Revision No: First Issue

Date of Issue:

DOCUMENT RELEASE AUTHORIZATION

Prepared by : ____________________________

Reviewed & Approved By : ____________________________

“This document is a property of GPT Infraprojects Limited and is not to be reproduced, copied, handed over to a third party or used for any purpose other than that for which it has been loaned.”

I. History of Revisions

Revision No.

Revision Date Chapter / Clause No. & Text affected

Reason for Revision

R0 First Issue

II. Document Distribution

Sr.No. Issued to No. of Seats Submitted123456

INDEX

CHAPTER PAGE NO.

1. PURPOSE 5

2. SCOPE 5

3. DEFINITIONS 5

4. CROSS REFERENCES 5

5. CONSTRUCTION PROCEDURE 6

5.1 Materials for Foundation Works

5.2 Concrete Mix for Foundation

5.3 Plants and Equipment’s for Well Foundation Work

6. CONSTRUCTION METHODOLOGY FOR WELL FOUNDATION 8

6.1 Setting out

6.2 Island, Cofferdam & Barge Operation

6.3 Cutting Edge

6.4 Well Curb

6.5 Well Steining and Sinking

6.6 Plugging of Well and Well Cap

6.7 Time Cycle

7. INSPECTION & TESTING 19

8. OHS & ENVIRONMENT MANAGEMENT PLAN 19

9. ATTACHMENTS 21

10.DISTRIBUTION 21

11.RECORDS 21

1. PURPOSE:

The purpose of this document is to provide detail construction methodology, resources deployment, and safety & environment system/procedures to be adopted by GPT and its sub-contractors during execution of well foundation in connection with construction of Major Bridge over Yamuna River at Kalpi (1275/2)

2. SCOPE:

The scope of this methodology covers the following activities:

Preliminary works Selection, testing and acceptance of materials and mixes for permanent works Deployment of plants, equipment’s and machinery etc. Construction methodology for well foundation. Quality Assurance and Quality Control during construction work and post installation

checks, tests etc. Construction Methodology for Well Foundation in water ( Caissons, details will be

submitted separately)

Physical Scope of work is as follows:

For dimension details of well please ref drg no: AA/1626/KALPI-SUB/WC & CE/02/R2.

3. DEFINITIONS:

The words like Contract, Contractor, Engineer (Synonymous to Engineers Representative), Drawing, Employer, Government, Works, Worksite used in this methodology considered shall be considered to have the meaning as understood from the definitions of these terms given in the General conditions of the contract.

4. CROSS REFERENCE:

The methodology shall be read in conjunction with the following documents:

RVNL Technical Specification. IRS codes (Concrete Bridge Code etc.) MORTH - Specification for Well Foundation. BIS/ASTM/BS standards/ codes referred elsewhere in this methodology. Good for Construction – Drawing for Kalpi Yamuna Rail Bridge.

5. CONSTRUCTION PROCEDURE:

5.1 Materials for Foundation Works:

The following materials shall be used for the activity:

5.1.1 Cement:

The cement is Ordinary Portland Cement of 43 grade & Portland Pozzolona Cement conforming to IS 8112 & IS 1489 codes respectively and shall meet all physical and chemical requirements as specified in RVNL spec, MORTH spec & Contract Spec.

5.1.2 Coarse & Fine Aggregate:

Coarse & Fine aggregate conforming to IS 383 shall be used. Gradation of combined aggregates of different sizes (Coarse Aggregate only) shall be in accordance with IS 383.

Various mechanical properties of coarse aggregates and properties of fine aggregate are to be conformed to IS 2386 Series and the tests shall be conducted as per relevant test codes as described in RVNL spec, Contract Spec.

5.1.3 Water:

Portable water shall be used for concreting and shall be conforming to RVNL Spec.

5.1.4 Reinforcement Steel:

Reinforcement steel for works shall be Fe 500D grade and conforming to IS 1786, only TMT bars to be used.

5.1.5 Concrete Admixture:

Admixture to be used shall be conforming to IS 9103 and prior approval from Engineer shall be obtained for the use of Admixture. Dosage of admixture shall be as per manufacturer’s instructions and as per workability requirements, which shall be finalized during design mix and trials.

5.2 Concrete Mix for Foundation

Concrete mix design shall be carried out as per RVNL Specification and IS 10262 or any other standard accepted mix design guidelines and grade of concrete to be used shall be as per drawing / specification.

The concrete shall be designed to achieve desired degree of workability for specific grade of concrete to facilitate concreting operation. Trials shall be conducted and cubes shall be cast, tested before acceptance of Design mix.

Grade of Concrete for Well Curb: M 35 Grade of Concrete for Well Steining: M 25 Grade of Concrete for Bottom Plugging: M 25 Grade of Concrete for Top Plug: M 25 Grade of Concrete for Well Cap: M 35

5.3 Plants & Equipment’s for Well Foundation work:

The following Plant/Equipment shall be used for execution of Well Foundation:

Sr. No.

Plant Description Make / Capacity No Required

Remarks

1 Crawler Crane 20 T, TATA 02 For well sinking & shifting purpose.

2 Shell Grab 0.5 - 0.9 02 For well excavation3 Diesel generator 82.5 KVA 01 For power supply.4 Welding M/C 04 For cutting edge fab,

shuttering/staging etc.5 Batching Plant Schwing Stetter 02 18 cum/hr

6 Transit mixer TATA 04 06 cum capacity7 Concrete pump Schwing Stetter 028 Total station Leica 01 For survey9 Auto level M/C Sokia 01 For level work

10 JCB 3D 02 For handling well excavated soil.

11 Vibrators Electric 05 For concreting.

6. CONSTRUCTION METHODOLOGY FOR WELL FOUNDATION

6.1 Setting Out

Necessary reference points shall be fixed, away from the zone of blow-ups or possible settlements resulting from well sinking operations. Such reference points shall be connected to the permanent total stations with the base lines on the banks. Reference points shall be also be fixed to mark X-X axis (Usually along the traffic direction) and Y-Y axis (Normal to X-X axis) accurately. A temporary bench mark shall also be established near to the well, away from the zones of blow-ups and or possible settlement.

6.2 Island, Cofferdam & Barge Operation

Wells in water (Above 4.0m depth):- The area is more than 4.5m deep water, formation of protected island by constructing cofferdam alternative methods shall be adopted. The material to be used for construction of cofferdam shall be as per design and drawing depending on the operating water level with tidal effect.

The material shall be either MS steel shell or Steel Sheet pile of required size fabricated at centralized yard and shall be transported to site by trailer or truck.

Sand shall be filled into the cofferdam by grab or manually. In plan dimension there shall be minimum 2m working place in protected island formation. (For reference please refer annexure drawing for cofferdam with sheet pile and sheet shell)

Barge Operation

To tackle the well foundation works in water spans, deployment of flatbed floating barge shall be required to approach for transportation of materials and machineries to well foundation and as well as to execute the well sinking works.

The barge shall be designed for operating water level taking into account for draft requirement and freeboard with anticipated operating dead load consists of well sinking crane, crew, and dredged muck and self-load. Well sinking barge shall be feed up with materials and services to be provided by another barge. Tug boats shall be for movement and anchoring/mooring of barges. Total 2 sets of well sinking barge with required number of Tugboats to complete the well sinking works in time. Please refer schematic drawing of well sinking by Barge.

6.3 Cutting Edge

Sr.No. Description Location Used

1 Angles 150 X 150 X 16 Outer Tee2 Angles 75 X 75 X 8 Brackets3 MS Plate 20 mm Cutting Edge Plate4 MS Plate 12 mm Bent Plate & Stiffeners5 MS Plate 10 mm Skin Plate

The cutting edge shall be fabricated with mild steel structural sections and plated of specified grade as per approved drawings. Fabrication of cutting edge may be carried out at site or at a shop. The cutting edges shall be fabricated in pieces / segments. During the process of fabrication and handling / erection suitable temporary supports are to provided / maintained to render rigidity and to keep shape of the segments and / or parts thereof. Number of segments shall be decided prior to start of fabrication depending on easement of handling and transport. Checks are to be made on dimension and shape of the segments.

For bending the structural members, V – cuts may be made and after bending such V – cuts are to be closed by welding. Joints in the length of structural sections shall be made with fillet welds with a single cover plate or as shown in the drawings.

Tools and Plants for Cutting Edge Fabrication:

Rolling machine / Hydraulic Jacks for bending. Drilling machine. Electrical welding machine. Pug cutting machine. Hand grinding machine / Table mounted wheel grinder.

Fabrication:

Working Platform

The working platform is made up of used plain steel plates welded to each other’s over levelled concrete surface at the central fabrication yard. The fabrication of the cutting edge involved the following steps.

Preparation of back angles:-

Layout of cutting edge is marked on working platform. Angle sections are cut of required length. A pair of angles shall be placed together back to back and shall be bent to the

required radius by hydraulic press on bending platform and same shall be checked with curvature template and corrected if required.

Preparation of MS plates:-

The required width and length of the plate as per drawing shall be marked and cut using pug cutting machine.

Plate shall be bent to the required radius. The same shall be checked with curvature template and corrected if required.

Preparation of Brackets:-

Layout of Brackets is marked on working platform. Angle sections are cut of required length. The angles are welded as per the drawing, the same is to checked on the layout

platform and corrected if required.

Assembly:-

The MS plate shall be connected with angle by tack weld and checked for the required radius. After final checking welding shall be done as mentioned.

Stiffeners shall be welded in required spacing. Bent plates shall be welded as per the drawing. Fabricated pieces of cutting edge segments are to be shifted to site by truck of

trailer.

Prefabricated segments of the cutting edges shall be brought to site of work and assembled at the well location. Segments of cutting edge shall be erected on firm & levelled ground or prepared island base at the predetermined position. Temporary support as required to facilitate assembly and keeping the entire assembly in true shape shall be provided. Placement of the segments shall be made with the help of a crane on wooden sleepers placed along the periphery of the cutting edge.

Dimensions, shape & size, alignment and level shall be checked by the Engineer and splice plate shall be welded at every joints and final welding shall be completed.

6.4 Well Curb

The following steps are involved in construction of well curb.

1. Placement of Cutting Edge.2. Fixing of formwork and rebar’s.3. Concreting.4. Curing.5. Removal of formwork.6. Sinking of Well Curb.

Placement of Cutting Edge:

Accurate survey shall be carried out by Total Station for fixing the well locations. Permanent reference pillars are to be provided at the four sides i.e. along and

across centre line of bridge. The ground is levelled by removing the top loose soil and compacted and rescued

levels are recorded jointly with the Engineer’s representative. Centre point of well is marked. The fabricated cutting edge segments shall be shifted to site by truck / trailer up to

the jetty location the same shall be shifted to well location by barge. Wooden sleepers are placed at a interval of 1.50m along the circumference of the

cutting edge. Cutting Edge is placed over wooden sleepers using crane aligned and joined with

respect to centre lines. After alignment joints are to be welded. Level and alignment of cutting edge shall be checked finally using the established

horizontal controls. If required minor rigid bracing are provided for maintaining proper level.

Dowel bars are welded to Cutting Edge as shown in the drawing.

Formwork and Rebar’s Fixing:

Inner formwork:

Inner form panels are first cleaned and standard form releasing agent is applied on the surface.

To make the shutter joints leak proof suitable foam sheets between shuttering joints and/or masking tape at joints are used to seal the joints.

Inner formwork shall be erected and all the form panels shall be joined to form the true shape as per the concrete profile, horizontal and diagonal supports erected. The erection of inner formwork shall be as per enabling drawing issued by enabling dept. The formwork shall be handled by crane.

Fixing of Rebar:

Rebar’s are cut and shaped at the central rebar yard as per the approved bar bending schedule and transported to site using truck/trailer up to the jetty location. The bars shall be transported to well location by barge.

Adequate number of 75 mm cement concrete cover blocks shall be placed to maintain cover along the periphery of formwork and also at the bottom to maintain specified cover.

Outer vertical bond bars shall be welded with angle. All other reinforcement bars along with any stiffeners / spacers are fixed in position as per drawing and approved bar bending schedule.

The rebar are checked jointly with Engineer’s representative.

Fixing of Outer Formwork:

Before fixing of outer formwork entire floor area shall be cleaned. Form panels shall be fixed as per drawing. To ensure the leak proof joints, thin foam packing shall be provided between

adjacent shuttering panels. Alternatively masking adhesive tape shall be applied over the shuttering joints.

Access platform using landing mats are provided for inspection and concrete purpose.

Coil anchors shall be embedded in concrete, at appropriate locations for erection of shuttering for the next lift.

Final checking shall be done jointly with Engineers representative.

Concreting:

Concrete shall be done by static concrete pump located on barge. Concrete shall be transported from the nearest batching plant through transit

mixers and ferried to well location by the barge. Concrete shall be placed in a continuous pour. Shear key shall be provided at each

lift construction joint. Adequate illumination arrangement shall be ensured to provide safe working

during night hours to satisfy supervision and safety requirements. Preparation of construction joint shall be done by green cutting (removing the

laitance) using hard steel/nylon brushes before the final setting is over at each joint to receive the succeeding lift of concrete.

Curing:

Curing shall be done by spraying water on surface covered with hessian cloth. Curing can also be done by using approved curing compound.

De-shuttering and Gauge marking:

Outer formwork shall be removed within 24 hours. Inner formwork shall be removed after 72 hours Gauge marking shall be done along both axes at four outer face location of the well

by using template.

Sinking of Well Curb:

After removal of inner form panel, gunny bags filled with sand shall be placed in between wooden sleepers along the periphery at the bottom of cutting edge.

Grounding of the curb shall be done after removing the inner forms. The curb is sunk to the ground level by manual dredging in the dredge hole. When

the dredging is partially complete, the loose material is removed from the dredge hole using the plate gran and is dumped outside the area of well, later this dredged material shall be disposed to nearby area provided by engineer.

The sinking history would be recorded in the format as provided in the technical specification (Appendix 1200/I, MoRT&H).

The sinking level is monitored at regular intervals of 500mm.

6.5 Well Steining and Sinking:

The steps involved in the Steining are:-

1. Inner and outer formwork.

2. Rebar fixing.

3. Concreting and curing.

4. Sinking.

Inner and outer formwork:

Inner and outer formwork is made of 4mm MS Steel plates and rolled steel sections fabricated for a lift of 2.5m.

3.0 mm thick foam sheet adhesive tape at the location of joints are used to seal the joints.

Form releasing agent shall be applied on the inner face of the panels coil anchors/ nuts, which are to be embedded in concrete for erection of lift are fixed at appropriate locations.

The inner form panels are erected for the subsequent lifts, the form work is supported on the coil nut arrangement with the bottom lift concrete. The rebar are fixed in position followed by fixing of outer formwork. Over the inner formwork, rigid horizontal supports shall be provide to keep the shutters profile and it shall be used for platform after placing the landing mats

Final checking of formworks shall be carried by jointly with Engineers rep.

Rebar fixing:

Re bar are cut and bent at the central rebar yard as per the approved bar bending schedules and transported from the yard by truck/ trailer.

Re bars are fixed as per drawing and schedule. Adequate cement concrete cover blocks shall be provided along the periphery of

the formwork to maintain the cover of rebar.

Concreting and curing: Placement of concrete shall be done as described for the well curb. Shear key shall be provided at each construction joints. The concrete surface shall be cleaned thoroughly and surface preparation is made

to receive the succeeding layer of concrete. Before casting the last lift of steining it shall be checked and verified for

appropriate steel for false steining, grooves for precast beams to support false work for well cap.

De - shuttering:

The inner and outer form panels are removed after 12 hours of the concrete finished time.

Steining Sinking:Following the de shuttering of steining lift, gauge marking is carried out at both axes in line with well curb marking and reference height is marked on the wall surface. The sinking operation would be started after 16 hrs of concreting for steining.

Sinking of wells shall be carried out by dredge hole method by using the following steps:

Sinking operation:

The sinking operation involves lowering of the well by dredging in the dredge hole. Plate grab shall be used in case of soft strata like sandy silt, soft clay, dense sand,

etc. In case of hard clay, stiff clay strata heavy-duty chisel shall be used, followed by

dredging using Tyne grab. Levels and alignment of well shall be checked regularly interval of 1hr of sinking to

observe the tilt and shift of the well at closer intervals if the visual observation demands.

Sinking operation shall be preferably carry out round the clock under skilled supervision.

Dredged materials shall be disposed off to locations designated by the Engineer.

The above cycle of well steining and sinking shall be repeated up to the last lift of the well until well reaches to the founding level.

Precautions during sinking:

When the wells have sunk close to each other and clear distance between them is not greater than the diameter of wells, sinking shall be taken up on all wells and they shall be sunk alternately.

Before seasonal floods all wells on which sinking is in progress shall be to sufficient depths below the designed scour level.

Very deep sump shall not be made below the well curb. The depth of sump shall not exceed 3.0m below the level of cutting edge unless otherwise specifically permitted by Engineer.

Dewatering is avoided if sand blows are expected.

Tilts and Shifts:

The wells shall be sunk into earth with in permissible limit of tilt and shift:-

The dredging operation shall be carried out uniformly over the dredge hole area. When the minor tilt and shift occurs the same shall be corrected by controlled grabbing or partial dredging in the direction opposite to tilt.

In case of tilt/shift is excessive, following method shall be adopted for correcting the same.

1. Eccentric Kentledge Loading.2. Providing Temporary obstacles beneath the cutting edge.3. Pull the well by winches.

Procedure for monitoring Tilts and shifts:

Tilts and shifts is monitored by:-

Checking the levels at fixed gauge mark on both of the opposite faces along axes of well. Levels are checked from the reference pillars along the axes established in advance for this purpose. The difference in level will establish the tilt along the axis. It is designated as ratio of difference in level to dia of well. Such checking and recording of tilts and shifts are done at regular intervals depending upon the rate of sinking but at least once a day, provided there has been sinking of the well.

The tilt of any well shall not be exceed 1 (horizontal) in 80 (vertical), and the shift at the well base shall not be more than 150mm in any resultant direction. Measurement for tilt shall be taken every day are recorded.

Sinking history of well shall be maintained in the format given in Appendix 1200/I, MORT&H

6.6 Plugging of well and well cap:

Following are the details for:-

1. False Steining.2. Bottom Plug.3. Sand Filling.4. Intermediate Plug.

5. Top Plug.6. Water Filling.7. Well Cap.

False Steining:

False steining is cast wherever required and mentioned as per drawing.

Bottom plug:

Once the cutting edge has reached the founding level as shown in the drawing or as decided by the engineer, a sump of required shape and shape as shown in the drawing or decided by the Engineer shall be formed. It is desirable to have a good idea of the shape of the sump either by probing or by sending divers.

After completion soundness test of bottom plug filling inside the well shall commence after a period of 3 days.

Sand filling:

After the bottom plug and waiting period is over, sand filling shall be started. Good quality sand shall be filled in dredge hole after 3 days of bottom plug concrete up to required level.

After sand has been filled in the well, water remaining on top of the sand shall be bailed outers. Top level of sand to be checked and top plug / intermediate plug of required grade of concrete and thickness shall be laid as shown in the drawing, and balance work of well cap shall be taken up.

Intermediate / Top plug:-

Intermediate / Top plug will be carried out after sand filling as per drawing.

Water filling:

Water filling in the steining wherever mentioned in the drawing shall be taken into consideration.

Well Cap Casting:

Well cap reinforcement

Layout for the well cap reinforcement shall be given on top plug and well steining concrete. Already cut, bent and shifted reinforcement shall be tied in position as per approved drawings. Clear cover blocks made from same grade of concrete as that of well cap shall be tied to reinforcement.

Well cap formwork

The normal streel forms shall be the fixed in position as well cap outer side forms as per drawing. Supporting arrangement shall be done as per drawing. Well cap shuttering shall be done as per shape and size of well where false steining is not there.

Well cap concrete

The concrete mixed at central batching plant shall be delivered through transit mixers. Concrete shall be placed through Concrete pumps. Concrete shall be vibrated with high frequency needle vibrators. It shall be ensured that concreting is done continuously and completed in a single pour without any cold joint.

Time cycle

A Well curb casting: Duration (days)i) Ground preparation for cutting edge placing 1.0ii) Fabricated cutting edge placing 1.0iii) Cutting Edge Welding 5.0iv) Well curb inside shuttering / staging 2.0v) Vertical bars fixing – welding etc. 2.0vi) Binders / links fixing 1.0vii) Outside shuttering fixing 2.0viii) Checking & Concreting 2.0ix) De - shuttering 1.0

Total duration 17B Well Sinking 1m / day, so 4 m lift 4C Well Steining Lift 2.5mi) Reinforcement fixing 2.0ii) Inner and outer shuttering 3.0iii) Checking and concreting 2.0iv) De shuttering & Sinking 2.0

Total duration 9.0D Bottom Plug, Sand filling, Well capi) Cleaning, checking 7 clearance for bottom plugging. 1.0ii) Bottom plugging 1.0iii) Sand filling 4.0iv) Top plugging 1.0v) Reinforcement for well cap 3.0vi) Outer shuttering for well cap 2.0vii) Checking and concreting 1.0viii) De shuttering 1.0

Total duration 14.0

8. INSPECTION & TESTING:

All the Inspection and Testing requirements to be prepared in the form of inspection and test plans for various activities described under different clauses of this methodology as per relevant M.O.R.T&H Specifications, Contract Technical Specification and other Codes/Standards as mentioned in Reference Chapter by the site Quality Control representative.

These inspection and test plans shall consist of type of inspection and name of the test to be conducted for product realization, frequency of testing, acceptance criteria and category for inspection.

Inspection and test plans shall be revised whenever there is any change in methodology and specifications etc. Various field and laboratory test formats referred in inspection and test plans shall be mentioned in respective ITP’s for various activities.

Any Non-conformity shall be observed, recorded, corrective/preventive actions and closing of NCR’s shall be as per the established document procedure described in Project Quality Plan.

Various Documents/Records required to be maintained for the present segmental methodology shall be listed by project quality plan.

9. OHS & ENVIRONMENT MANGEMENT PLAN:

The OH & Safety and Environmental Management Plan for the project shall be prepared to meet the various safety and Environmental Management requirements as mentioned in contract documents and also as per the established OH& Safety and Environmental Management Systems and procedures of GPT INFRA PROJECTS LTD.

General Safety Arrangements:

All employees, workmen and labour of GPT INFRA PROJECTS LTD. And its subcontractor engaged for bridge work shall be wearing proper P.P.E before entering the site.

Barricading shall be provided to cover the entire length of working area. The barricading shall be provided as per the approved scheme. Painting of barricading shall be done with approved colour scheme for prominent visibility.

All the vehicles engaged for the work shall be fitted with proper indicator systems. Reverse light rear view mirror and reverse horn shall be fitted with all the vehicles. Break, steering condition, tire pressure shall be checked periodically. Proper speed limit shall be maintained within the project site. Driver shall not drive vehicle when he is not fit mentally and physically. Proper caution boards, flag boys be placed to caution the vehicle movement at

unloading points. Trained supervisors shall be deployed at working sites.

Unauthorized persons and visitors shall not be allowed within the critical area/hard hat area.

Trained Flag Boy and warning systems shall be provided. Periodic training shall be provided to drivers, helpers, and bank men and flag boys.

Tool box talks shall be carried at frequent intervals by safety personnel/site in charge. Proper supervision and proper planning of the activity shall be done. Proper illumination shall be provided during night work. Good housekeeping shall always be maintained nearby working area to prevent any

kind of hazards. Any lifting equipment’s shall be engaged in work after proper checking and load

testing as per relevant requirement. Periodic maintenance shall be done for all lifting equipment’s/devices deployed at work. Record shall be maintained in prescribed format.

All necessary and required safety measures/precautions during the execution of job shall be undertaken. It shall be ensured that the construction materials, equipment and facilities will not cause damage to existing property or interfere with the operation of the project. All equipment such as lifting tools tackles, cranes, excavators, dumpers, Roller and Dozer etc. shall be checked periodically to ensure its safe working. It shall be complied with all applicable provision of safety regulations; clean-up program and other measure that is in force at the site.

It shall be comply with the instruction given by the client safety engineer or his authorized nominee regarding safety precautions. Protective measures, clean-up requirements etc.

For all major activities potential risks shall be identified and eliminated/minimized at planning stage by the project safety officer, Project Manager and Works Manager. The risk assessment analysis considers the risk index (risk index guide contains Tasks hazard identification, risk assessment & risk control measures.) as H-High and M-medium or moderate and L-low (acceptable/tolerable risk).

The project safety officer will refer to risk index guide for determining risk index. Activity & associated risk when High or medium is recorded and suitable measures shall be taken to control the risks. The works Manager and Line supervisors along with project safety officer shall be review, high and medium risk activities, in order to reduce level of the risk.

Corporate occupational health& Safety department shall be informed about actions taken to contain the risks. H-High and M-medium risk shall be bought under control by taking suitable measures. Where the activity/risk is not covered in risk index guide, it is further evaluated and included in risk index guide by the corporate occupational health & Safety Department for further references.

The risk management at project level shall be carried out for every new activity undertaken, where the project is ongoing and the measures identified for risk control shall be recorded in risk control document by the project site. New measures may be required

in the form of addition of new work method/precaution/improved safety equipment / additional occupational health & safety training / safety signs / posters etc.

10. ATTACHMENTS:

Annex 1: Details of Cutting Edge for 19.15 x 9.15 m dia well curb for Kalpi Yamuna Rail Bridge Project.

Annex 2: Details of Well Steining for 19 x 9 m dia well for Kalpi Yamuna Rail Bridge Project.

Annex 3: Fabrication details of Inner and Outer formwork for well curb for Kalpi Yamuna Rail Bridge Project.

Annex 4: Fabrication details of Inner and Outer formwork for well steining for Kalpi Yamuna Rail Bridge Project.

Annex 5: MORT&H Sinking Details to be used.

11.DISTRIBUTION:

The document shall be distributed to all concerned users.

12.RECORDSThis segmental methodology shall be retained till project completion.