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Capability Statement

UNDERGROUND CONSTRUCTION & MAINTENANCE June 2013

OTB Engineering Capability Statement ‐ Underground Construction & Maintenance Page 1

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TB Capability Statemen

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aintenance 2013 v2.doc

OTB Engineering OTB Engineering is a Partnership company of highly qualified and experienced professionals dedicated to the ingenuity and implementation of practical and innovative solutions that develop, support and maintain infrastructure throughout the world.

OTB Engineering was formed in 2005 by a number of similar-minded experienced civil, tunnel and geotechnical engineers who felt that the industry needed an organisation that could provide a high level of service in terms of its technical capability but highly focused on the needs of its customers and the needs of their projects. The aim of the business is to be both practical and innovative in whatever measure demanded, by using our experience to implement well tried and established (though often forgotten) or innovative solutions and to seek new or alternative ways of doing things. In many instances what is innovative in one sector of our business is often well-tried in another and it is this cross-fertilisation of ideas that OTB Engineering seeks to promote.

As a consequence of its experience and approach OTB has been engaged to provide strategic advice, resolve complex engineering design problems or provide management skills by numerous major organisations. Our UK and international client base includes project owners, funding agencies (government, banks and insurers) infrastructure operators, international contractors, multi-disciplinary consultants etc.

The company is staffed and managed by highly qualified and experienced professionals drawn from a wide range of backgrounds including civil engineers, tunnelling engineers, road and railway specialists, electrical and mechanical engineers, geologists and risk, contract and legal analysts.

OTB is constantly looking for the brightest graduates, the best project managers, designers and experienced professionals to contribute to and become part of its future.

Services OTB Engineering provides a range of feasibility, design and construction services:

Space planning and tunnel geometry selection.

Temporary traditional and sprayed concrete linings.

Permanent linings in either sprayed or in-situ concrete reinforced or unreinforced.

Excavation and support sequencing.

Materials and equipment selection.

Rockbolting, anchoring and piling design.

Sprayed concrete mix design.

Health & Safety procedures.

Quality control procedures.

Asset protection.

Waterproofing.

Grouting.

Fire protection.

Ground characterisation and construction performance.

2D and 3D finite element analysis.

Estimation of ground movements and their impact on existing infrastructure.

Construction optimisation.

Risk assessment.

Design audit.

Instrumentation and monitoring.

Design checking.

Construction verification.

Refurbishment and maintenance advice, design and supervision.

Expert opinion.

Due diligence.

Legal and contractual advice.



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Human Resources OTB Engineering is a led by six Partners and two Associate Partners and supported by a further technical and administrative staff of seven plus a number of associated consultants who considerably enlarge the services offered by the company. The firm has a branch office in the North of England and a Vietnam registered subsidiary company based in Hanoi.

Key staff Anthony Umney BSc CEng FICE – Non-executive Chairman Anthony established Haswell (now Atkins China) in Hong Kong in the early seventies and went onto be the

head of British Mass Transit Consultants in Taipei. On returning to the UK he joined Maunsell (now Aecom) as their global director responsible for tunnelling worldwide. Anthony has been responsible for a wide range of tunnelling projects internationally. Anthony was responsible for much of the design of the initial phases of the Hong Kong MTRC and also the Taipei Metro. He was the Project Director responsible for the design of Waterloo and Westminster Stations on the Jubilee Line Extension and also the Docklands Light Railway extension into Bank, the initial phase of the Copenhagen and Bangkok metros, as well as Second Avenue Subway in New York. He has also managed the design of a number of important highway tunnels. Anthony is a past Chairman of the British Tunnelling Society. Anthony is the Non-executive Chairman of OTB Engineering and provides strategic advice on a number of major tunnelling projects worldwide.

Jasper Cook BSc MSc PhD CGeol MIHT FGS – Senior Partner Jasper has 40-years' experience as an engineering geologist, geotechnical engineer and highway specialist. He

combines his practical experience with both appropriate research and a proven track record in technology transfer. Jasper runs OTB Engineering’s office in Hanoi where he is responsible for international bank and aid funded improvements of rural infrastructure throughout Sub-Saharan Africa and South-East Asia. He is also a specialist advisor to the World Bank. Jasper held the posts of Senior Lecturer at the University of Strathclyde and was formerly the Head of Geology at Wimpey Laboratories and a consultant to the UK’s Transport Research Laboratory. He has extensive experience in the design, supervision, management and interpretation of engineering geological and geotechnical projects in the UK, Middle East, the Caribbean, Africa, SE Asia, Russia and Australia. Jasper is a leading authority on the investigation, characterisation and engineering performance of tropically weathered rock and soil and is the author of a number of books and numerous technical papers.

David Hindle BSc MSc DIC CEng EurIng MInstRE MICE – Senior Partner David’s career commenced in the 1970s in deep level underground mining in central Africa where he was

responsible for the introduction of a number of modern rock mechanics methods. He went on to become Technical Director of Travers Morgan, responsible for tunnelling and a Managing Director of Dr G. Sauer (UK), a specialist tunnelling consultant. David is consulted internationally for his expertise in tunnel design and for the solution of construction problems. He recently advised on 22 highway tunnels in Madeira a 6km long, 500m deep highway tunnel in Albania and is currently advising on underground station construction for Ottawa LRT. David lectures to the British Tunnelling Society on the design of rock support and also the use and application of NATM. David has over 35 year’s practical experience in the design and construction of tunnels worldwide.

Max Brooker BSc (Eng) MBA MIMechE MAPM – Senior Partner

With over 33 years post-graduate engineering experience, Max has developed a talent for assessing project technical and financial viability together with the development of project risk mitigation strategies that can improve project business performance. He has led risk and Lender’s due diligence assignments across several sectors including; rail, roads, ports, canals, air traffic control, power and defence. Max originally developed his engineering and project management skills in the UK Defence Industry on Systems Engineering Projects. He was Project Manager Japan for Thompson Marconi Sonar Systems and latterly managed the upgrading of the UK Nuclear Submarine Combat Systems for BAE Systems. Max has developed a good reputation for international PPP/PFI due diligence assignments in blue chip UK based Consultant Engineers. His ability has been recognized by the UNECE and he is a member of their PPP team of specialists.

Jon Austin BEng (Civil Engineering) MICE IOSH – Senior Partner Jon has over 30 years experience in the design, construction, operation and rehabilitation of London

Underground’s infrastructure, in particular tunnelling within the operational railway environment. Jon was a former employee of London Underground and Infraco JNP/Tubelines. Through his continued association with LUL, Jon is uniquely qualified to plan, coordinate and lead the necessary physical works within the constraints of the railway environment. Before co-founding OTB, Jon was the Managing Director of Dr G Sauer Company responsible for the design of sprayed concrete tunnel linings for CTRL Contract 250 and the design of the re-development of Shepherd’s Bush Station. He is an LU accredited Suppliers Representative and held Civil Engineering Manager and Engineer in Charge posts for coordinating all works associated with the operational railway for a number of major underground construction projects in London. He is currently working on Crossrail Contracts system wide.

Phil Astle BSc (Eng) MSc CEng MIMMM – Partner Phil has over 25 years experience in the design and construction of geotechnical and civil engineering

works, including tunnels, retaining walls, foundations, ground improvement and slope stabilisation. He is particularly experienced in the design of tunnels and underground structures in both rock and soft ground. He has been the lead tunnel designer of a number of important metro, road and rail schemes including: Athens Metro (Monastriaki Station), Santiago Metro, Jubilee Line (London Bridge Station), Channel Tunnel Rail Link, Docklands Light Railway and Boston Transitway. Phil specialises in numerical modelling, analytical design methods and computer aided design. He is also an experienced temporary works designer familiar with the design of steel, concrete and timber.



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Darren Page BSc MSc (Eng) CEng CGeol MIMMM FGS – Partner Darren is both a chartered engineer and a chartered geologist with over 22 year’s experience, the majority

of which has been spent working in multi-disciplinary and multi-cultural project team on major international construction projects. He has a wide range of experience in geotechnical engineering and engineering geology across a broad range of market sectors. Darren has acted as an expert in witness in the resolution of construction disputes arising from geotechnical issues and is experienced in investigating geotechnical related construction failures on behalf of insurers and in disputes. Darren’s major project experience includes the Channel Tunnel, Jubilee Line Extension, Hong Kong MTRC Tsueng Kwan O Extension, Singapore MRT Circle Line, Tel Aviv Metro, London’s Thames Tideway and Crossrail.

Stephen Goulding BSc CEng MICE – Associate Partner

Stephen has held a wide range of management positions in the railway and construction industry. His proven record of creating, planning, leading and delivering significant business and customer benefits through all aspects of commercial and programme management provide the unique experience behind the professional expertise now offered in: commercial management, programme management, project management and business solutions. He has developed particular interests and abilities in the field of programme and commercial management of major railway and construction industry projects during the last 30 years, with particular emphasis on infrastructure enhancements, especially tunnels. He has over 20 years experience leading programme teams delivering major UK construction schemes. Most recently, Stephen has been providing support to major contractors on projects under-performing financially and promoting opportunities for improving their performance.

Steve Beauchamp BSc (Hons) MSc MCSM GEng MIMMM – Associate Partner

Steve is a mining and engineering geologist with 30 years experience in the mining and civil engineering industries. After graduating from the Camborne School of Mines in 1981 he joined the General Mining Union Corporation of South Africa as an exploration and mine geologist. Following his MSc he joined mining consultants Mackay & Schnellman, who were later taken over by civil engineering consultants Howard Humphreys, with whom he worked on the A55 North Wales tunnels. In the late 1990s Steve became an Associate of Geotechnical Consultancy Services of Manchester then a Senior Lecturer in Applied Geology and Consultant for the Centre for Environmental Technology, Staffordshire University Division of Natural Sciences. Since 2000 Steve has operated as an Independent Geological and Geotechnical Consultant to a wide range of companies, including, site investigation contractors, mineral extraction operators, water engineering and mineral planning consultancies . In 2012 Steve joined OTB to head up our new Chester office,

Anthony Swain BSc PhD CEng MICE FRSI – Associated Consultant

Prior to joining University College London some 9 years ago as Emeritus Professor of Transport Infrastructure Engineering, Tony had worked in contracting, a New Town Development Corporation, a County Council and most recently as Chief Engineer to consultants WS Atkins. His wide-ranging experience covers bridge design, foundations, buildings, power, water, ports and harbours, oil and gas, tunnelling and industrial research. In recent years his most noticeable involvement in major projects has been as Design Manager for London Bridge Station on the Jubilee Line Extension; for the upgrading of the Thames Tunnel on the East London Line and for the Mei Foo to Tsuen Wan section of the Kowloon-Canton Railway in Hong Kong. Tony acted as Civil Engineering Manager for the bids for the London Underground Public Private Partnership (PPP) Metronet contract. His research interests cover the fields of, asset management, delivery Infrastructure to developing countries and soil/structure interaction. Recent consultancy work has been related to introduction of asset management to London boroughs, the PPP of London Underground, and tunnelling projects in London. He is a Royal Society Industry Fellow.

Gordon Ince HNC CEng MIME – Associated Consultant

Gordon Ince is one of the World’s foremost authorities in mechanised tunnelling technology. He is a mechanical engineer with over 40 years experience worldwide on numerous major infrastructure tunnelling projects including: water transfer, sewerage, stormwater drainage, railway, metro, highway and power supply. Gordon has also consulted on the design and implementation of tunnel segment factories. During the 1970s he became Chief Engineer of specialist TBM manufacturers W Lawrence & Son London Ltd and Managing Director at the end of the decade. In 1980 he became a Director of Grosvenor Tunnelling International, later bought by James Howden & Co Ltd., where he was responsible for their Tunnelling Division supplying TBMs and roadheaders to major projects including: Singapore MTS, Cairo Waste Water, Channel Tunnel, Chatillon Paris, London Ring Main, Athis Valenton Paris, Palermo Sicily, Staten Island New York, Orly Airport Paris, Danish Great Bealt, and Genoa Metro. In1988, Gordon was awarded the James Clarke medal from the British Tunnelling Society.

Robert Wagstaff – Associated Consultant

Robert has over 30 years experience in the manufacture of precast concrete for a wide range of civil engineering applications and in particular concrete segments for tunnels and shafts. He has undertaken major projects worldwide where his experience in planning, setting up and operating pre-cast concrete factories has been key to the successful delivery of the tunnelling scheme. Rob has consulted on several major international tunnelling and civil engineering projects involving pre-cast concrete work including the SMART project in Kuala Lumpur and several projects in Iran, India and SE Asia. During his career Rob has pioneered, developed and implemented the introduction of new manufacturing technology which increased production capacity and reduced overheads. He has managed or been consulted on some of the largest and most efficient pre-cast concrete tunnel segment factories worldwide.

Tony Smith LLB – Associated Consultant A UK qualified lawyer experienced in the development and operation of PPP frameworks and international

infrastructure projects. Tony is Head of the United Nations PPP Specialists ‘Rapid Reaction’ Team set up to aid countries in their PPP implementation programmes and procurement a member of the Business Advisory Board and the PPP Specialists Bureau of the U.N.E.C.E. and an Associate Expert of UNDP Asia Pacific. Tony conducts capacity building training and lectures extensively on PPP related topics. His PPP experience is vast and includes roads projects in India, Mongolia, Indonesia, Philippines as well as the UK and Ireland. In India, Tony is currently training procurement authority staff and advising the National Highways Authority of India to speed up the delivery of 12,000km of new P3 road projects, most are four-lane highways.



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Curtis Small MSc MCIT MCIB – Associated Consultant

Curtis has over 20 years experience, the majority of which has been spent working within the safety critical railway environment for London Underground and Railtrack on safety, quality and environmental aspects of major projects or for specialist departments. He is highly qualified in these particular subjects and is highly sought after for work mainly on-site as part of planning, assurance and regulatory teams for rail-related projects. From 2002, Curtis helped London Underground deliver their Connect Project and was responsible for the development, maintenance and management of the SQES audit and assurance programme. This included management under CDM (as both a Principle Contractor and Client) and also a major programme of works undertaken to remove asbestos. Curits was recently the CDM Coordinator for the construction of an extension of the Docklands Light Railway to Stratford and the Olympic Park and also for the new tunnels forming the upgrade of the underground works at Victoria Station.

Jerry Conway BSc MSc CEng MIMMM – Associated Consultant

Jerry Conway is an engineering geologist and rock mechanics engineer with more than thirty years international experience in rock slope engineering, underground excavation engineering and geohazard assessments for projects in the hydropower, water supply, mining, transportation, oil and gas, and radioactive waste management sectors. His career began on the Dinorwic Pumped Storage Scheme and following further tunnel construction experience in Kenya, he worked on the investigation and design of major highway tunnels in the UK, and water supply tunnels in the Near East. Over a five-year period in the USA, he was involved in underground testing for radioactive waste management facilities, as well as design and construction of numerous civil tunnelling and mining projects. He returned to the UK as rock-mechanics engineer on Pen-y-Clip tunnel, and since that time he has worked on a wide range of tunnelling and underground excavation projects in the UK and overseas, advising both client organisations and contractors, particularly in the areas of geotechnical risk evaluation and hazard assessment. Jerry is currently assisting in the design and development of oil/gas storage caverns in Singapore.

Dorian Baker MSc MCIT MCIB – Associated Consultant Dorian Baker has over 30 years’ experience in the railway industry and in particular, of rolling stock and associated

railway systems. He was in British Railways Chief Engineer’s office on matters connected with maintenance and renewal of all types of built infrastructure railway systems on the network. Dorian has worked for leading rail wagon and lightweight passenger rail car manufacturers and has been responsible for extensive R&D in the EU. He has been recognised as an expert in the dynamic characteristics and systems of railway rolling stock and has written various published papers on these matters and has advised the UK Government, Scottish Enterprise, Eurotunnel, as well as rail wagon manufacturers from Europe and the U.S.A. Also, Dorian has developed expertise in the interface between static structures above the railway line and the dynamics of wagon and intermodal combinations that travel below. During the past fifteen years Dorian has advised many client organisations on a range of railway systems technical matters, particularly problems concerned with the interfaces and interactions between engineering disciplines, operations and commercial demands. More recently, he has worked on loading gauge problems, the kinematic envelope and rolling stock design for optimum infrastructure solutions

Robert Vaclavek Eng Tech (Austria) – Senior Engineer Robert is qualified engineer with 17 years experience in tunnel design and geotechnical engineering. Projects

include the design and supervision of ground investigation contracts and designing Sprayed Concrete Lining (SCL) tunnels, retaining walls and piled foundations. He has also worked on slope stabilisation design, earthworks, soil pre-consolidation and has knowledge of other specialist geotechnical monitoring and construction techniques. Robert has experience in working on tunnelling projects in London including the Chanel Tunnel Rail Link and LUL station upgrade work at Shepherds Bush, Green Park, Tottenham Court Road, Bond Street and Victoria. He has undertaken overseas tunnelling projects in Austria, Iran, Spain & USA and he has recently completed work on the design and construction of two TBM tunnels and cross passages, together with two cut and cover stations for Delhi Metro in India.

Emilio Linde BSc (Spain), MSc DIC (UK) – Senior Engineer Emilio is an engineering geologist with more than ten years experience in the construction and tunnelling

industries. He has been involved in some of the most important infrastructure projects in his native country of Spain, leading geotechnical design teams and also assuming key positions during tunnel construction. Previous employers include Spanish consultancies (GOC and SEINCO) and major international contractors such as DST (Portugal), FCC Construction (Spain) and COMSA (Spain). Emilio has recently completed postgraduate studies at Vigo University and Imperial College, London. He joined OTB Engineering in the summer of 2011 and is currently providing geotechnical advice and supervision on tunnelling and shaftsinking to the contractor for Crossrail Contract 305 in London.

Naomi Wheeler MSc ACGI – Engineer

During her Sixth Form studies Naomi worked towards the Engineering Education Scheme at Gold Level as part of a team of five students and was selected to represent the UK at the 17th European Young Scientist Contest in Moscow in 2005. Since graduating from Imperial College London in 2009 Naomi has worked for OTB on a number of tunnelling and geotechnical projects in London and the UK including: Tottenham Court Road and Bond Street station improvements, Jubilee Line tunnel strengthening, Dudley Canal Tunnel Portal Stabilisation, Sumner Street Cable Tunnel, Corrib Onshore Gas pipeline Tunnel, Dorchester Hotel Service Tunnel and the LUL Green Park Step free Access Shaft.

Dionysios (Dennis) Vlachos BEng (Greece), BSc MSc (UK) – Engineer

Dennis began his career in Greece as a electronics engineer having graduated from the Technological Institute of Piraeus, but in 2006 he took a position as Assistant Site Engineer, at the Athens Metro (Underground) Extension of Line 2 where his responsibilities included supervision of the ventilation shafts, excavation phase., site inspection and report authoring during the erection of the new tube station and set ting up and maintaining a computer network and engineering database. He then undertook a degree in civil engineering at Surrey University followed by a postgraduate degree in structural engineering for which he gained a distinction. He joined OTB in 2012 and has worked on various projects in UK including for London Underground and Crossrail.



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Recent & current tunnelling projects Crossrail Contract 300/410 Bond Street Station Client: Bam Nuttall/Ferrovial/Kier JV To facilitate the connection between the new Crossrail Underground Station to London

Underground's Bond Street Station Upgrade project, which is being undertaken at the same time, an existing London Underground Central Line ventilation tunnel requires diverting. OTB have been appointed designers for the temporary tunnelling works needed to undertake this difficult and complex undertaking involves a mix of traditional timbering, steel frame and cast iron construction together with modern sprayed concrete lining (SCL) tunnelling methods.

E-80 Bancarevo Motorway Tunnel, Serbia Client: Subterra A.S. –Ogranak Beograd Lot 3 of the new E-80 Trans-European motorway, the Prosek - Crvena Reka section

currently under construction in Serbia, includes a 2-lane, twin-tube 600m long bored and 150m cut and cover Bancarevo tunnel constructed through Tertiary and Oligocene flysch sequences of red sandstones, mudstones and siltstones. These are overlain by Quaternary alluvial, fluvial and deluvio-fluvial deposits of sandy-clay to clay soils. Funded by EIB under international competitive bidding rules, the successful tenderer, Subterra AS of Prague, has appointed OTB as specialist tunnelling consultant to advise on specialist contractual, construction and geotechnical issues.

Holywood Sewer Pipejack Tunnels, N Ireland Client - White Young & Green for Northern Ireland Water Northern Ireland Water's proposed new sewer scheme at Holywood, County Down comprises a network of new sewers to connect to the Kinnegar Waste Water Treatment Works and sections of these sewers will be constructed using trenchless techniques. OTB have been retained by the main consultants for the scheme to review the ground conditions and proposed construction methodology. The site area is located to the southeast of the treatment works, close to the A2 Holywood Bypass and Belfast to Bangor railway. The proposed tunnel sections would pass underneath both the railway line and the road as well as below a high pressure gas main.

Gibraltar Kings Lines Oil Fuel Depot Client: Pell Frischmann for MoD Defence Estates OTB have recently been engaged to undertake an assessment of the underground assets that currently form part of the now redundant military underground oil storage and transmission facility based on the island of Gibraltar. The assets are currently held by Defence Estates and are to be decommissioned and handed over to the Government of Gibraltar. An assessment is required to understand the nature and extent of the asset, in particular its current condition and likely behaviour in the future, including the requirement for remediation and ongoing inspection and maintenance of the facility. To date OTB have undertaken geotechnical, ventilation and file & life safety surveys of the underground tunnel complex together with a strategy for gaining safe access to the fuel cell caverns for future inspection and remedial works.

Crossrail Contract 360 Client: Costain SkanskaJV OTB are providing design and supervision services for the SCL works at Eleanor Street ventilation and emergency access shaft on the London Crossrail project. The work involves the preparation of an innovative design solution for the underground works that significantly reduces the amount of SCL tunnelling by simplifying the scheme layout. This should in turn result in substantial cost and programme savings with consequential reductions in risk to this and the accompanying running tunnel contract (C305), which OTB are also engaged on.

Bank Station Improvements Client: BFK JV for London Underground OTB have been engaged by Bam Nuttall/Ferrovial/Kier (BFK) joint venture to assist them in preparing proposals to London Underground for improvements to the Northern Line at Bank Station. This highly complex and congested station is a key central hub for the City of London and is scheduled for major upgrade work. This will involve creating a new platform alongside the exiting platforms, one of which would become the central passenger concourse, requiring a diversion of the southbound running tunnels via the construction of two turnout junctions to the north and south of the station. At these locations the available underground space is extremely constrained requiring innovative solutions for construction from OTB.

Netherton Canal Tunnel Refurbishment Client: Canal & River Trust Constructed in the 1850s, this 2.77km long brick-lined tunnel is one of the largest and deepest (canal tunnels in the UK. Since its construction it has had a history of ground movement and lining deflections with several phases of minor to major repair work having been carried out. Towards the centre of the alignment the tunnel is about 120 metres deep passing through a major fault and igneous intrusion in the Etruia Marl series. This has resulted in substantial ongoing stress-related deformations in the tunnel lining. Major refurbishment and stabilisation works are underway and in the most active central section a reinforced shotcrete arch supported on raking micropile and anchor foundations designed by OTB has been constructed using the RAMARCH ® system.



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Dingle Station Cavern Collapse Client: Groupama Insurances

On 24th July 2012 a collapse occurred in the former Liverpool Overhead Railway (LOHR) Dingle Station Cavern, Toxteth, Liverpool, resulting in the evacuation of the houses above. At the time of the collapse the tunnel was being used as a car repair business operated by Roscoe Engineering Limited who were forced to close, abandoning vehicles and equipment trapped underground. On behalf of Groupama Insurances, Ford & Warren Solicitors instructed OTB to carry out and inspection of the collapse and investigation into its cause, with recommendations for stabilising and repairing the damage.

Pleasant Gap Mine Client: Graymont (PA) inc The mine intends to install a conveyor in an enlarged and re-lined tunnel supported by steel ribs with KSL corrugated steel lagging. OTB were engaged to develop design and methodology for installation the support. Voids between the steel lagging and the existing/excavated rock profile were to be pneumatically filled with single sized river gravel. The system is founded on a reinforced concrete invert slab and drainage behind the lining is provided with adequate provision for maintenance to prevent the build up of hydrostatic groundwater loads behind the lining in the long-term.

Jubilee Line Tunnel Strengthening Trial Client: Costain for London Underground OTB were commissioned to design and supervise a trial for a new replacement steel lining to confirm the feasibility, establish a suitable safe construction methodology and clarify the risks involved in replacing a section of existing 3810 ID precast concrete expanded lining currently showing signs of distress on the southbound Jubilee Line between Baker Street and Bond Street Stations. The trial, replacing ten concrete rings, was successfully carried out on the same system of precast concrete expanded lining in the Charing Cross Sidings. The new lining and construction methodology was designed to be installed in Engineering Hours (01:30 Hrs to 04:00 Hrs) with daily hand-back of the track maintaining the line speed and clearance.

Jubilee Line South of Bond Street Remedial Grouting Client: Costain Laing O'Rourke for London Underground Following the discovery in mid-2010 of water and sand ingress into the 3850 ID grey cast iron linings of the Jubilee Line northbound and southbound running tunnels immediately to the south of Bond Street Station, a programme of monitoring and repairs was instigated by London Underground. OTB Engineering undertook a condition survey to define the affected lengths of each tunnel and the degree or severity to which each are affected. This was followed by recommendations for grouting and supervision of the repair works, which were successfully completed in 2012.

Cavanacaw Gold Mine Access Tunnel Client: Alan Auld Associates for Omagh Minerals The abandoned open pit lead mine at Cavanacaw in Northern Ireland is planned to be extended underground to exploit gold reserves at depth. As part of the planning requirements the open it will be infilled and the land reclaimed. An inclined tunnel from the surface to the base of the open pit will be installed during the filling process to provide access for the future underground workings. OTB have been commissioned by the mine designers Alan Auld Associates to provide the design of the access tunnel, which will be constructed in cast in situ and sprayed concrete.

Singapore NIPE Contract C4 Independent Project Risk Review Client: Penta Ocean Construction Co Ltd Penta-Ocean Construction Co. Ltd (POC) has been awarded a Contract by Singapore’s Public Utilities Board (PUB) for the design and construction of a 6m diameter segmentally lined tunnel and pipelines between Jurong Island and Gul Road/Pioneer Road Junction on the Singapore mainland, as part of its Newater Infrastructure Plan Extension (NIPE). This Contract is referred to as ‘NIPE Contract C4’. POC has instructed Hill International to provide them with commercial/contractual support and in turn Hill International has asked OTB to provide both POC and Hill International with independent technical support focussing on where this influences the likely commercial success of the project.

Expert Advice on Tunnel Works Client: Government of Hong Kong, Civil Engineering & Development Department

The Civil Engineering & Development Department of the Hong Kong Government has engaged OTB to provide expert tunnelling advice on forthcoming metro and heavy railway projects in the city area. To date, ten schemes have been examined involving major bored tunnelling works below the urban and surrounding environments. This has involved a review of the operational parameters for EPB and slurry shield TBMs, rockbolt & shotcrete supported drill and blast tunnels and requirements for ground treatment.

Glendoe Hydro Recovery Project Client: Dundas & Wilson for Scottish and Southern Energy

OTB has undertaken and independent review of the technical and commercial aspects of the recovery project for the major hydroelectric scheme in Scotland on behalf of the Board of Scottish and Southern Energy. This involved site inspections and consultations with the project team to review the cost and fitness for purpose of the ongoing repair works to the tunnel infrastructure following a collapse in the headrace tunnel shortly after it was commissioned in 2009. The facility is due to come back on line in mid-2012 and will provide a significant input to the power generating capacity of the region.



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Crossrail Contract 305 Client: Dragados Sisk JV

The largest contract let by Crossrail for the construction of the Eastern running tunnels Contract 305 comprises the construction of twin 6.2m diameter bored tunnels from a launch chamber at Limmo Peninsular through to the new Crossrail Farringdon station, length of drive approximately 8.3km; a launch chamber at Stepney Green through to Pudding Mill Lane Portal, length of drive approximately 2.7km; and a launch chamber at Limmo Peninsular through to Victoria Dock Portal, length of drive approximately 0.9km. The work involves the construction of temporary and permanent shafts and a major underground turnout cavern to be constructed in sprayed concrete. OTB is providing geotechnical advice to the Works Contractor Dragados Sisk JV and is undertaking temporary works design and checking together with supervision of the SCL works, in particular the Stepney Green twin turnout caverns, which when completed will be the biggest underground openings ever constructed in London. In addition, a detailed predictive geotechnical log is under preparation for the TBM driven running tunnels.

Jansen Project Service & Production Shafts Client: DMC Mining for BHP Billiton OTB was engaged by the shaftsinking contractor to undertake a 3rd Party review of the temporary works design for two 1,030m deep shafts to be constructed 140km SE of Saskatoon, Saskatchewan, Canada. The shafts are 6.5m ID hydrostatically-lined and will be constructed in three phases: Phase 1: Install ground freezing system to eliminate the risk of groundwater inflows in the water bearing zones during shaft sinking, excavate the shaft to 1,030m depth with various combinations of temporary ground support using rockbolts, welded wire fabric, lattice girders, shotcrete and structural liner plates. Phase 2: Install the permanent lining system from the bottom up. Phase 3: Install shaft furnishings from the top down. The design review considered the excavation of the shafts and the design of the ground support systems in the various geological strata/zones.

Crossrail Bond Street Station Ticket Halls Enabling Works Clients: McGee & Eirscott The enabling works for the ticket halls at Bond Street station on the Crossrail project include the construction of cable diversion tunnels, the demolition of existing structures and basements and the construction of temporary retaining walls. OTB was engaged by the demolition contractors McGee and Eirscott to undertake settlement and structural damage assessments of the various excavations on the adjacent Thames Water utilities and to undertake the design of a temporary retaining wall. The assessments and design were required to conform to Crossrail and London Underground standards for approval by the Thames Water delivery partner.

National Grid Cable Tunnels Client: Costain for National Grid

32km of new cable tunnels will be constructed beneath London. The plan is to lay cables that will enable National Grid to deal with increased demand and better handle rising energy flows across the city. The project calls for two tunnels, each between three and four metres in diameter and approximately 20 to 60 metres below ground. The first, at 20km, will run from Willesden via Kensal Green, St. John’s Wood and Islington to Hackney. The shorter 12km tunnel will run from Kensal Green to Wimbledon. OTB was engaged by the works Contractor under a Professional Services Agreement to undertake LU tunnel condition surveys, track condition surveys, circularity checks, track surveys and pre and post-crossing condition surveys at each of the 9 locations where the first tunnels cross the London Underground Victoria and Piccadilly Line tunnels.

Montgomery Road Sewer Tunnel, Belfast Client: WYG Ireland OTB was engaged to undertake a review of the feasibility of constructing the proposed

Montgomery Road sewer in Belfast using trenchless methods. The sewer forms part of the Loop River and East Belfast Flood Alleviation Scheme and comprises a straight 214.4m long, 1.5m internal diameter, class 120 concrete pipe, containing a dry weather flow channel. The study reviewed all types of trenchless tunnelling methods available and provided a risk assessment and recommendations for the procurement of the work. QA review of the selected contractor’s methodology was later carried out.

Gilon Ridge Tunnel, Israel Client: Northcroft for Israel Railways OTB was engaged to review the design of a 4,686.5m long twin-bore railway to be

constructed on the proposed Akko to Karmiel railway in the Upper Galilee region of Israel. The tunnel design showed construction using conventional tunnelling methods i.e. drill and blast and/or mechanical excavation and/or roadheaders in moderately hard rock. The ground exposed in the tunnel is to be temporarily supported using a combination of rock bolts, shotcrete and steel ribs. Each tunnel bore has the same cross-sectional geometry and an excavation cross-sectional area of 71.5m2. Cross-passages are spaced at 244m intervals and alternate cross-passages also serve as utility rooms. In the review OTB recommended that steel fibre reinforced concrete should be allowed and that contractors could propose a full-face TBM alternative construction method.



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Whiteball Tunnel Refurbishment Client: ISS Ltd for AMCO and Network Rail OTB has assisted the manufacturer, ISS Limited, in designing the RAMARCH® system for the refurbishment of the Whiteball Railway tunnel. Constructed by Brunel in the mid-19th century, this 9m diameter tunnel is located on the Main Line to the West Country, which allowed only limited closure of the railway to install the support to the deteriorating brick lining. The system was chosen because its ability to be rapidly installed using mechanically assisted methods thereby reducing risk. Here the RAMARCH® will initially secure the brick from loosening and, in an extended possession will be shotcreted to form a permanent reinforced concrete lining.

RAMARCH ® Client: ISS Ltd

OTB have helped to develop a new tunnel support system to replace lattice girders and wire mesh in sprayed concrete lined tunnels that simplifies and speeds up installation with improved safety to the tunnel crew. Manufactured entirely from standard welded wire fabric, the product is supplied in panel dimensions and geometries to suit the tunnel design and installation method, which can be almost entirely mechanised. The completed system is fully compatible with all recognised standards for concrete reinforcement and can accommodate conventional waterproofing, rockbolting and spiling. The open form allows effective encapsulation of the steel with shotcrete with little or no shadowing.

Farringdon Station – Crossrail, UK Client: GZ Consultants LLC/Mott MacDonald Crossrail is a major east-west railway through central London and seven major underground

stations are proposed. Concern has been expressed about the geological conditions at Farringdon, which were perceived to be particularly problematic. In conjunction with the British Geological Survey, a geological model was prepared using the software program GSI3D. The model identified the extent of faulting and the presence of higher permeability layers within the Lambeth Group. The model will be used to reduce risk and give greater confidence in the design and the construction methods used.

Bond Street Station Upgrade Client: Costain/Laing O’Rourke JV for London Underground

As part of its major ongoing station improvements London Underground is currently upgrading its key interchange station at Bond Street. OTB is providing site interface and asset protection for the improvement works to the station on behalf of the contractor joint venture. In addition, this has involved design and checking of temporary works together with surveys and recommendations.

Tottenham Court Road Station Upgrade Client: Vinci/BAM Nuttall JV for London Underground

Tottenham Court Road Station currently provides an interchange between the Central and Northern Lines and in the near future also Crossrail. The interchange is currently poor and the ticket hall small and cramped. Capacity enhancements are proposed that will provide a new ticket hall and improved interconnections between current and planned lines. OTB is engaged on the design of underground construction temporary works openings for existing tunnel break-outs, lifts and stairwells, overbridges and connecting tunnels. Many of these works are complex and have difficult and constrained access. Designs are developed using 3D modelling to ensure correct geometrical control. Both 2D and 3D finite element modelling are used to predict ground movements and structural response to the excavations. OTB is also designing and supervising construction of the sprayed concrete lined temporary openings as an alternative approach to traditional mining methods specified. In addition, OTB developed a method of forming an overbridge to the station platform tunnels, which was successfully implemented and is now being used on other London Underground station improvement projects. The scheme won the 2013 ICE London Civil Engineering Award.

Preston Tunnels and Shafts Client: Kier/Murphy JV Interserve JV In November 2010, the Western River Crossing beneath the River Ribble flooded unexpectedly. The 2.82m diameter tunnel was being constructed using an earth pressure balance machine in Glacial Till. OTB has carried out a forensic investigation as to the root-cause of the failure. This included and examination of all factors that may have given rise to the failure and the flooding of the tunnel. In addition, two diaphragm wall shafts failed during dewatering and again OTB was called in to investigate the root cause. OTB is also advised on methods of tunnel and shaft recovery and possible alternative methods of tunnelling including pipe thrusting, which was later successfully used.

Taipei Metro, Taiwan Client: PICC/Swiss Re

The insurers and re-insurers for underground and MRT type projects seek assurance from authorities’ client bodies that the project works are being constructed to internationally accepted codes of practice. During construction continuing assurance is sought by means of risk management surveys being carried out by independent engineers at regular intervals. OTB has been engaged undertake a risk management survey of a number of contracts currently under construction.



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Hong Kong – Macau – Zhuahai Fixed Link Crossing Client: PICC/Swiss Re

At a cost of 38 billion RMB (£3.7billion), this 48km long fixed crossing will link Hong Kong to Zhuhai and Macau. By World standards this project is extremely large and contains numerous elements encompassing a wide range of engineering disciplines. The crossing over the mouth of the Pearl River Estuary involves the construction of a 23km sea viaduct, a 7km long immersed tube (the longest in the world), 2 artificial islands, link roads and two large reclamations upon which will be sited boundary crossing facilities. OTB undertook a preliminary identification of major project risks on behalf of the re-insurer and has subsequently provided a team of experts including bridge and viaduct construction, land reclamation, corrosion, immersed tube tunnels, engineering geology and geotechnics. The team are to periodically audit the design and construction of the works and advise on the management of engineering risks.

Ningbo Metro, China Client: PICC/Swiss Re Ningbo and is one of China's oldest cities, with a history dating back to 4800 BC. It is

now a city of nearly 8 million people and a historically and modern sea port, second only to Shanghai situated some 200 km to the North. The city has just commenced building the first line of a new metro system. The 21km long metro has 20 stations, 15 of which are underground and 5 are elevated. The central section through downtown Ningbo is 15km long. Stations are being built by cut-and-cover methods and the running tunnels by EPBM. OTB has been engaged undertake a risk management survey of a number of contracts currently under construction involving periodic visits throughout the underground phase of the project.

Red Line Metro, Israel Client: Northcroft for NETA The Red Line is the first line of a light rail metro system to be developed in Tel Aviv. The

proposed line is 22km long and runs approximately from south to north-east from Bat Yam via Jaffa, Tel Aviv to Ramat Gan and Bnei Brak. A total of 33 stops are planned, 10 of which are underground and a number of which are civil defence shelters. OTB was engaged to review the bill of quantities, initial scheme drawings, and the specifications for the Red Line as issued to the consortium that had proposed to build the scheme under a Public Private Partnership contract, and to provide an estimate of the cost of the scheme in accordance with the bill of quantities being used by NTA. OTB provided specific expertise on civil works construction and the railway systems. More recent assignments include an independent assessment of the entire project programme for the delivery of the scheme.

Corrib Onshore Development, Ireland Client: Shell Exploration & Production The Corrib gas field lies 80km off the north west coast of Ireland and is being developed

by Shell. A pipeline has been constructed from the field to landfall on the Co. Mayo coast and receiving gas terminal has been constructed about 8km inland. OTB was engaged to investigate the feasibility of constructing the pipeline in a 5km long tunnel under Sruwaddacon Bay. The feasibility study was subsequently being used by Shell to develop an invitation to tender for the project and provide a framework for further engineering studies. On-going support is being provided to Shell on the form of contract, the scope of work, TBM specification and geotechnical baseline report. A detailed Engineer’s estimate was also prepared.

Thirre Tunnel, Albania Client: Bechtel Enka JV for the Ministry of Public Works and Transport, Government of Albania This 6.34km long twin bored two lane road tunnel forms an important link on the highway

between Durres on the Adriatic and the eastern Balkan states. The tunnel was constructed in altered basic and ultrabasic rocks by conventional (drill and blast/mechanical) tunnelling techniques under 500m of cover. Difficulties were experienced in tunnelling through altered ultrabasic rocks at a critical time when the deadline for opening the road approached. High convergence and lining deformations were being experienced that threatened the programme and works and potentially the safety of the tunnel.

OTB was initially asked to by the Contractor to review the health and safety implications and later to critically review the existing design and the construction methods employed and rapidly identified the causal factors. Numerical analysis indicated that the tunnel geometry, rock support, tunnel linings and construction sequencing would all need to be altered to allow phased opening of the road on time. However, in late 2009 a serious collapse of the southbound tunnel occurred (lower picture) and OTB were brought in to advise on the recovery of the tunnel and later to undertake a Root Cause Analysis of the incident

Dudley Canal Tunnel Portal, UK Client: May Gurney for British Waterways Dudley Canal was constructed in the late 18th Century and partly occupies old mine workings. The resulting structure is now architecturally listed and is an important heritage structure and tourist attraction. One of the portals within the tunnel complex was in an advanced stage of deterioration. OTB investigated the causes of deterioration and designed a simple solution using rockbolts and steel reinforced shotcrete to stabilise the surrounding rock and sensitively repair the brick canopy.



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East Side Access, New York Client: Dragados

In order to = bring the Long Island Railroad into a new underground terminal beneath Grand Central Station in Manhattan new approach tunnels were constructed below 63rd Street to connect the station with existing tunnels beneath the East River. To enable the main hard rock tunnelling drives constructed by TBM, two TBM erection chambers were required located side-by-side with a 4’ rock pillar between the two. One chamber was supported using rockbolts and the other with steel sets and lagging due to the close proximity of the NYC subway. OTB undertook the detailed design of initial ground support for these chambers and the lifting supports for TBM assembly.

DART Underground, Ireland Client: CIE Residents Association Larnród Éireann is promoting a new railway link called the DART Underground. The

railway will run through the centre of Dublin and will provide a cross-city connection from the west and south to the east and north. The7.5km railway link is 7.5km long and will involve the construction of 5 underground stations. OTB was approached by the local community to advise them on the impacts from the proposed works and the operation of the railway. The community felt that Irish Rail’s proposed design had not been fully considered and asked OTB to find viable alternatives to present to Irish Rail. The works are being fast-tracked through the planning process via new legislation.

XpandXTM Rock Anchors Client: Romtech Ltd This product was conceived, designed and developed by OTB to provide a high capacity anchorage in rock. Its novel design incorporates ‘splines’ which expand against the rock wall as the bolt is tightened and also again, when the bolt is loaded, further enhancing its capacity. The anchor has been extensively tested at Imperial College and in the USA to the requirements of the US Department of Labor, Mine Safety & Health Administration. The anchor exceeds the load bearing capacity of any other mechanical anchor on the market.

Pajares Tunnel, Spain Client: Dr Sauer Corp. for UTE Dragados-Obras Subterráneas A new high speed railway line will link Madrid with Costa Verde and where the railway crosses

the northern edge of the Iberian plateau the route will be in a 24.5km tunnel. OTB was asked by the tunnel contractor, to initially identify, based on the geological information available and the proposed railway alignment, the location of a TBM assembly cavern to be used to build the central portion of this tunnel and also provide a crossover for the second bore. At each possible location identified the risks associated with the construction were scored to allow the contractor to make an informed decision. A suitable location was found 800m beneath the Cantabrian Mountains. Advice was also given on the detailed design of the cavern to be excavated using conventional (drill and blast) tunnelling techniques.

ViaMadeira, Portugal Client: Northcroft for Millennium Investment Banking The remote volcanic island of Madeira rises up to 1862m from the Atlantic Ocean. The island, an autonomous region of Portugal, is characterised by high steep slopes and deeply incised valleys. A total of 31km of new highway is being constructed as part of a public concession. 18.6km is in tunnel over 500m in length and 2.4km is on viaduct. The highway tunnels are single bore bi-directional and contain provision for emergency escape/access. There are 24 tunnels and the longest is 6.3km. OTB has been responsible for approving technical aspects of all the highway tunnels and bridges on behalf of the investors including construction, installations and their operation.

Green Park Station Client: Tube Lines Ltd/Transport for London

The existing station ticket hall has been enlarged and a new lift shaft will provide direct and step-free access from the surface to the Victoria Line and Piccadilly Lines. The upgrade was completed in time for the London Olympics in 2012. OTB undertook the independent (Category III) check of the design of the lift shaft, lift lobby stub tunnel and interconnecting tunnels. The shaft and tunnels were formed using sprayed concrete linings. The works lie immediately above and adjacent to the Victoria Line platform tunnels and escalator. Strict control was required of ground and structure movements and 3D numerical methods are being used to assess impact.

Santiago Metro Client: Ingendesa Ara JV Serving a city of 6 million, this metro system currently comprises 75km of railway and

105 stations spread over 5 separate lines. Lines 1 and 5 are currently being extended by 4 km and 13.5km respectively – both are underground and due to open in 2009. OTB, on behalf of the tunnel consultant, acted as specialist advisors. OTB's role was to critically review the NATM/SCL design being carried out locally and to approve the drawings for construction. Periodic visits were also being made to audit the works during construction. The station tunnel caverns are typically up to 19m wide and 250m long, constructed in soft ground and located at a depth of typically 10m from the surface. The caverns are lined with permanent sprayed concrete.



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Delhi Metro – Airport Express, Line 1 Client: Alpine -Samsung-HCC JV This construction contract includes 2.2km of twin bored tunnel and 1.27km of cut-and-

cover tunnel, plus two underground stations at New Delho and Shivaji Stadium. The first two sections are 1,540m long and underlie the existing Connaught Place Metro Station at depths of up to 45m. Three cross-passages are to be constructed in Quaternary sandy silt with groundwater pressures up to 30m. OTB was commissioned to develop a suitable means of dewatering the ground to allow cross-passage construction using NATM which has been successfully implemented.

Composite Railway Tunnel Sleeper Client: SIS Ltd for Metronet

To improve the rate and quality of track replacement on London’s underground railway network, OTB has managed the development of a lightweight replacement sleeper suitable of being readily man-handled through underground stations during night time closures. Weighing less than 25 kg, the sleeper is made from GRP and once fitted it is infilled with grout, which also binds the rail to the track bed. It can be fitted with either bull-head or flat bottom rail chairs. The sleeper has undergone rigorous static and dynamic laboratory tests specified by London Underground and is presently awaiting field trials before being introduced onto the underground network.

Jubilee Line – Baker Street to Bond St Running Tunnels Client: Tube Lines Ltd OTB has been assisting with the implementation of steel straps around the circumference of the tunnel as a temporary measure to ensure the integrity of the tunnel lining which is showing signs of deterioration. London Underground is seeking a permanent solution to replace the existing pre-cast concrete wedge block lining, and OTB was asked to identify a number of feasible options that could be delivered within the stringent constraints of the operational railway. Options considered include replacement with sprayed concrete or cast iron segments. OTB also undertook the detailed design of the tunnel lining and the lining replacement method and supervised trials.

Thames Tideway Project Client: CH2MHill for Thames Water Utilities

The Thames Tideway scheme is being instigated to prevent sewage overflows into the River Thames. This £3.6 billion project will entail the construction of an up to 80m deep 9m diameter tunnel 32.2 km from Chiswick to upgraded treatment facilities at Beckton. The tunnel will intercept over 20 ‘problem’ CSOs. A further 6.8 km long tunnel currently under construction will also connect Thames Water’s treatment works at Beckton with the pumping station at Abbey Mills. OTB provided a combination of strategic advice and engineering services on the project. Tasks undertaken included project management, contract preparation, risk management, cost estimation, constructability assessment, geotechnical baseline reports, river bed geophysical surveying (picture) and interpretation, specifications and specialist major project and tunnel engineering direction. These works follow a Peer Review of the entire project carried out by OTB in 2007. OTB are currently Framework Consultants for the project and have undertaken further commissions on TBM specification and selection, tunnel lining procurement and hydrogeological aspects of tunnel construction.

The Dorchester Hotel Cable Tunnel Client: Alan Auld Associates for J. Gallagher A new service tunnel has been constructed between 45 Park Lane and The Dorchester –

the very prestigious hotel in central London. The works comprise two 3.7m internal diameter shafts, 12m deep and 120m long tunnel 3.5m in diameter. The shafts were constructed within the basements of the existing buildings and close to their piled foundations. OTB undertook the detailed design of the shafts and tunnel linings where they comprised sprayed concrete. The tunnels and shafts were finished with an in-situ concrete lining. The tunnel is located entirely in the London Clay though the shafts encountered a small amount of waterbearing River Terrace Deposits.

Crossrail – Expert Panel Client: Cross London Rail Links Ltd Crossrail is a new major east-west heavy rail route across London, serving the City,

Heathrow and Canary Wharf. The central portion of which will be in tunnel. New and enlarged underground stations will be developed at key sites across the Capital. A senior member from OTB was appointed to the project promoter’s Expert Advisory Panel with the responsibility of independently advising on tunnelling and major project design issues.

‘Safety in Rail Tunnels’ Client: Dept for Transport/TRL There has been no uniform approach to managing the risk of fire in rail tunnels in the UK.

The combination of inherited rail infrastructure and differing vintages of rolling stock has meant historical procedures have only been put in place in response to incidents, such as the Kings Cross Fire in 1987. OTB reviewed the standards and regulations in force in the EU so as to improve the industry’s understanding of their requirements and therefore guide acceptance bodies.



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Victoria Line, Mid-Tunnel Ventilation Upgrade Client: Costain for Transport for London

Following the success of OTB's on the tube cooling, OTB assisted our Client in winning further ventilation improvements to London’s underground. The Victoria Line is being upgraded to accommodate new rolling stock and additional tunnel cooling is to be provided through upgraded ventilation fans. OTB challenged the existing conceptual design and our recommendations were accepted by London Underground. OTB is responsible for the mechanical and electrical design of the new ventilation equipment comprising fan, attenuators and smoke control dampers. OTB is also helped the Contractor to manage the installation of the new equipment. The site is located in a quiet residential area of London and due care is being given to noise and vibration under continuous operation.

Dublin Metro North, Ireland Client: Bouygues/White Young Green Metro North will serve an 18 km corridor from Belinstown in the north to St. Stephen’s

Green in the city centre via Dublin Airport, DCU, Drumcondra with interchange to the DART and LUAS systems. The light railway was being procured on a design, build, finance and maintain basis with the 25 year maintenance contract commencing on opening of the railway service. As part of the bid prepared by Bouygues and its partners, OTB was responsible for the coordination of the health and safety aspects of rail tunnel design, construction and operation.

Tunnel Cooling Programme Client: Costain for Transport for London Envisaged by London Underground to provide a means of cooling London’s

underground railway network, this system comprises the installation of modular air-conditioners which use groundwater extracted via boreholes as a coolant that is circulated through a heat exchanger and then discharged back into the ground. OTB is responsible for the development, detailed design and testing of a prototype air-handling unit. The units would be installed above the platforms at stations.

Crossrail North Woolwich & Plumstead Portals Client: Capita Symonds Crossrail is a major east-west railway being constructed through central London. The

central section incorporates twin bored tunnels from Paddington to Stepney Green where the tunnels bifurcate to Stratford and Canary Wharf, London Docklands and North Kent. There are 5 portal locations. OTB undertook the construction planning and programming for the detailed design of the North Woolwich and Plumstead Portals and provided specialist construction advice to the design team.

Crossrail Royal Oak and Pudding Mill Lane Portals Client: Costain/Skanska JV

Crossrail is a major east-west railway being constructed through central London. The central section incorporates twin bored tunnels from Paddington to Stepney Green where the tunnels bifurcate to Stratford and Canary Wharf, London Docklands and North Kent. There are 5 portal locations. OTB assisted in the construction of Royal Oak portal near Paddington and at Pudding Mill Lane near to the site of the Olympics, which are being done under advanced works contracts. OTB’s role is to manage the interface between construction and the railway.

Skills, Training and Professional Development OTB’s technical staff are highly skilled, most have post-graduate degrees with first degrees either in civil engineering or geotechnics. All technical staff are members of at least one professional organisation and some have held leading posts with them.

All technical staff are encouraged to become professionally registered and training and mentoring is provided to achieve this goal. All staff adhere to the CPD requirements associated with their professional registration and are expected to keep up to date with changes and developments in their particular field.

Additional training is provided to ensure that all staff have the appropriate health and safety certification to carry out their duties safely without endangering others. All site-active technical staff are accredited with the Construction Skills Certification Scheme.

OTB operates an exchange scheme for graduate engineers in conjunction with specialist contractors to provide its staff with valuable site experience whilst enabling the Contractor's staff to gain an insight into the design process. In addition the firm provides opportunities for vacation employment to undergraduates together with mentoring and assistance with their dissertations. Senior OTB staff regularly present technical papers, and specialist course lectures on construction, geotechnical and contractual topics.



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Our Clients Include:

Contractors AMEC BAM Nuttall Balfour Beatty Barhale Bovis Brett Concrete Bryne Bros Carey Group Costain Dragados Dyer and Butler Enka (Turkish) Fothergill & Co Ferrovial Genseed Underground Services Hill Construction Keltbray Kennedys Kier Laing O'Rourke Linden Homes South East May Gurney McGee Morgan Sindall Murphy N M O’Sullivan Penta Ocean SES Contracting John Sisk Skanska Stephenson Subterra (Czech) Taylor Woodrow. TGT TMT Tunnelling Vinci

Owners & Developers Canal & Rivers Trust CEDD (Hong Kong Government) Crown Agents Docklands Light Railway DMC Mining Services (Canada) Godfrey Bradman Inchicore On-Track London Underground Ltd Metronet Ministry of Defence Estates Network Rail Omagh Minerals Ltd. Scottish & Southern Energy Shell E&P Ltd Thames Water Utilities Tower Hamlets Tube Lines United Learning Trust Welsh Water Westfield

Suppliers Adfil Ceresola EPC Barchip Foulstone Forge Hanson ISS NCD International Specialist Innovations Titan Enviromental Treatment Romtech

Funding Agencies, Banks & Insurers

AFCAP Asian Development Bank DfID DIF Infrastructure II (Dutch Investment Bank) Groupama Patent PSI (Taiwan Insurers) Swiss Re World Bank

Consultants AECOM Alan Auld Associates Arup Bechtel BPA Capita Symonds CH2MHill Chapman Geotechnics Chemonics International Clarkebond CMA Limited Donaldson Associates DPSS Dr Sauer & Partners (Austrian) DS&A Gall Ziedler Consultants (Austrian) Geodata (Italian) Global Transport Knowledge Partnership HAG Consult (Ghanaian) Halcrow High-Point Rendel Intech Associates Jan Hellings & Associates Leones Mineral Planning Group Mouchel Parkman Northcroft Pell Frischmann Project Leaders Rohill Services Transport Research Laboratory UMI (Austrian) URS UTC (Vietnamese) White Young & Green

Legal Curtis, Mallet-Prevost, Colt, Dundas & Wilson CS LLP Ford & Warren Solicitors Kennedys Law LLP Mosle LLP

Office Locations Head Office:

52 Lant Street, London, SE1 1RB, United Kingdom. Tel: +44(0)20 7099 2608 Fax:+44(0)20 7099 2611 Email: [email protected]

North of England Office: The Old Church Hall, Old Coach Road, Kelsall, Tarporley, Cheshire, CW6 OQJ, United Kingdom. Tel/Fax: +44(0) 1829 751980 Mob: +44(0) 780 1306734 Email: [email protected]

Vietnam Office: Suite 1313 Hanoi Towers, 49 Hai Ba Trung St., Hanoi, Vietnam. Tel: +84 (4) 3934 3959 Mob: +84 (0) 904 259 899 SKYPE: jaspcook EMail: jcook @otbeng.com

Websites www.otbeng.com & www.otbvn.com



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Quality Assurance Since 2008 OTB have operated a Quality Management system and from March 2011, OTB was certificated compliant under ISO9001:2008.

Health & Safety OTB have retained Peninsula Business Services Ltd. to provide competent advice on the management of Health & Safety within the business and to provide timely advice on Health & Safety and Welfare issues that arise in the course of the business.



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Building Accreditation OTB has achieved an Achilles 4‐star rating. Building Confidence accreditation agency Achilles is a supplier pre‐qualification and accreditation service for the UK construction industry.

Environmental Accreditation OTB has achieved a blue certified environmental status.

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