Special Geotechnical Applications Complex Retaining ... piles Ø1.00/1.50m, length 11.00m with...

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Special Geotechnical ApplicationsComplex Retaining Systems and StructuresElefsina – Korinthos – Patras – Pyrgos - Tsakona Motorway, Concession Project Central & Southern Greece

ProjectFinal Designs for construction of retaining wall system with single ordouble pile-walls and application of permanent prestressed anchorsfor the secure execution of highway works in adverse geotechnicaland geometrical areas

Construction CostTotal project’s cost: approx. € 9 m.

Project ScheduleDesign: 2009 - 2011Construction: -

Project DescriptionTotal length of complex retaining systems: ~1000mMaximum height of retaining systems: 35 m

GeologyPliocene and Plio-pleistocene Marls, Conglomerates, Alternations ofMarl-Conglomerates, Alluvial Deposits, Weathered slope materials,Sands, Gravels, Clay-Silts

Our Services• Geotechnical interpretation and design parameter assessment• Geotechnical parameters optimization with slope stability back

analysis• Specific load check of the retaining system from random sliding

surfaces• Serviceability check of the retaining system• Check and dimensioning of prestressed anchors according to

EC7• Assessment and determination of the seismic load according to

the area’s geotechnical profile• Final Detailed Design

Clients• OLYMPIA JOINT VENTURE

(HOCHTIEF Construction AG - AKTOR S.A.)• AKTOR S.A.

Cross Section of retaining wall at geometrically adverse areas

Κεφαλόδεσμος από οπλισμένο σκυρόδεμα C30/37διαστάσεων 1.35mX1.10m (πλάτος X ύψος)Pile Cap 1.35mX1.10m (width X height)with C30/37 reinforced concreteαπόστραγγιστική τάφρος

Dra inage trench

Πέτασμα οπλισμένου σκυροδέματοςC30 /37 στατικού πάχους 25cmFinal lin ing of reinforced concreteC30 /37, 25cm static thickness

Τοίχος προστασίας επίχωσηςαπό οπλισμένο σκυρόδεμα C30/37Protection wall o f backfillingwith C30/37 reinforced concrete

Existing ground level from Road Design

ΕπίχωσηBackfil

Λεπτομερής τοπογραφική απότύπωση από επιτόπου εργολάβο AW1Detailed topographical survey by AW1 contractor

hydraulic arrangementsΔιάτρητος τσιμεντοσωλήνας Φ200με ελάχιστη κλίση 1%Perforated cement pipe Φ200with minimum 1% inclina tion

Στραγγιστήριο με γεωύφασμα κα ι χονδρόκοκκουλικό σύμφωνα με παρ.38 της Τ.Σ.Υ.Drain from big size granu la r material coveredwith geotextile according to pa r. 38 of T.C.C.

Φρεατοπάσσαλο ι από οπλισμένο σκυρόδεμα C20/25διαστάσεων Ø1.0 0/1.50 m, μήκους 11 .00mBored piles Ø1.00/1.50m, length 11.00mwith C20/25 reinforced concrete

Μόνιμες περιφραγματικές απόστραγγιστικές οπές μήκους 10.0m,ονομαστικής διαμέτρου 3 '', ενδιαμέσως των πασσάλων, μεανωφερική κλίση 10°, με δύο απόστραγγιστικούς σωλήνες απόPVC (π.χ. διπλοί σωλήνες DURVINIL ), με υλικό φίλτρουαπότελούμενο από θερμοπλαστικές σφαίρες ή χαλαζιακή άμμο.Permanent double wall screen drainage holes, 10.0m long,nominal d iameter 3'', between the piles, with 10° minimum upwardinclination, consisting o f two concentric drainage PVC pipes (e.g.DURVINIL double wall screen), with filtering material which iscomposed by thermoplastic spheres or quartz sand.

38

1.551.60

11.45

14.984.20

3:2

1.00

.25

11.0

0

.50

1.10

1.35

.30

2.80

.60

1.30

.75

.50

.25

.39

.58

1 0°

3.00

5° or 15°

.50

Σκυρόδεμα διαμόρφωσης κλίσεων C8/10 10εκConfigu ration concrete C8/10 10cm

Φράχτης ανάσχεσης βραχοπτώσεων ο οποίοςθα καθοριστεί σε επόμενη φάση μελέτηςRockfall protection barrier which should bedefined a t a next design phase

Εγκοπή επί του πετάσματος (Λεπτ."Α")Slot on the pile lining (Detail "A")

Σκυρόδεμα εξομάλυνσης C8/10 10εκLean concrete C8/10 10cm

3.50

9.00

8.50

9.50

7.00

16.50

17.50

Μόνιμα προεντεταμένα αγκύρια μήκους , αριθμού τενόντωνκαι φορτίου προέντασης ως σχετικό πίνακα.Εναλλάξ εφαρμογή κλίσης αγκυρίων 5° και 15° ανά πάσσαλο.P ermanent p re-stressed anchors with length, number ofstrands and p restressed load according to the relevant table.Varia tion of anchor inclination from 5° to 15° per pile.

8

69

64

SR

30L

Cross section of composite retaining system with prestressed anchors

Cross section of composite triple retaining system with prestressed anchors



Special Geotechnical Applications

Retaining Works inside a Landslided AreaPathe Section Maliakos – Kleidi Motorway, Concession Project Central Greece

ProjectConstruction of retaining wall system with single or double pile-wallsfor the secure execution of highway works inside landslided area

Construction CostTotal project’s cost: approx. € 1,5 m.

Project ScheduleDesign: 2010 - 2011Construction: -

Project DescriptionConstruction of retaining wall system with single or double concretecantilever pilewalls for the secure execution of highway works insidea landslided areaTotal length of pilewall system: ~300mMaximum height of pilewall system: 10mTotal slope height: 30m

GeologyThe bedrock of the landslide area includes ophiolite rocksThe overlying soil materials consist of a sequence of slided masses

Our Services – Design Details• Detailed final design of permanent open cut• Geotechnical interpretation and design parameter assessment• Special design and dimensioning of the pile system with finite

elements software• Specific load check of the retaining system from random sliding

surfaces• Serviceability check of the retaining system• Assessment and determination of the landslided area’s seismic

load

ClientMALIAKOS KLEIDI CONSTRUCTION JV(HOCHTIEF - AKTOR – J&P AVAX – VINCI CGP – AEGEK – ATHENA)

Foot-wall founded on conventional embankment in combination with EPS fill

Layout depicting the landslided areas

Plan view of the excavations and the retaining system structure

Cross Section with double retaining wall pile series




Mechanically Stabilized Earth WallsPathe Section Maliakos – Kleidi Motorway, Concession Project Central Greece

ProjectMechanically Stabilized Earth Walls with height 10-16m constructed by gabions as retaining walls or bridge abutments

Construction CostTotal project’s cost: approx. € 5 m.

Project ScheduleDesign: 2009 - 2011Construction: 2011 -

Project DescriptionMechanically Stabilized Earth Walls with height 10-16m constructed by gabions as retaining walls or bridge abutmentsTotal MSEW length: ~500mMaximum height: 10-16mMSEW slope: 85o up to vertical

GeologyGU 10 ~ 14: Recent deposits, PhyllitesGU 16 ~ 19: Recent deposits, ophiolithic sequence, limestones

Our Services – Design Details • Final Detailed Geotechnical Design • Geotechnical interpretation and design parameter assessment• Stability evaluation of MSEW with specialized software• Internal and External stability checks• Appropriate Geogrid application according to fill material

characteristics• Gabion modulation in geometrically complex areas

ClientMALIAKOS KLEIDI CONSTRUCTION J/V(HOCHTIEF – AKTOR – J&P AVAX – VINCI CGP – AEGEK – ATHENA)

Excavation layout of MSEW foundation area

Plan view and details of grid and gabion connection

Longitudinal section of MSEW bridge abutment




Jet Grouting Diaphragm Wall Egnatia Highway, Section 2.4 – 3.1Northern Greece

ProjectJet Grouting diaphragm wall, for the reduction of water inflows in order to construct the foundations of M2 to M6 piers of T10 bridge at Metsovitikos River

Construction CostTotal cost: approx.€ 6 m.

Project ScheduleDesign: 2007Construction: 2007-2008

Project Description • Jet Grouting diaphragmatic wall with secant ground piles• Central diaphragm wall, with 3 rows ground piles• 4 additional diaphragm walls at the foundation areas of the piers• Diameter: Ø 80, Length 10m-20m• Total Walls Length: 365m

Geology • Riverbed deposits (sands, breccia argillaceous materials)• Conglomerates with high permeability• High river flood discharge• High groundwater table

Our ServicesDetailed Final Geotechnical Design

Construction Details• Dam construction for the arrangement of the riverbed • Rip - rap construction for the protection of the main diaphragm

wall

Client AKTOR S.A.

Jet grouting Construction Stages



ProjectRetaining wall for the protection of the highway

Construction CostTotal cost: approx. € 2,1m.

Project ScheduleDesign: 2003Construction: 2003 - 2004

Project DescriptionRetaining wallLength: 375mHeight: 2,0m-9,75m

GeologyLimestones, scree in a seismically active area

Our ServicesDetailed Final Geotechnical & Structural Design

Construction Details• 32 concrete sections• Surface foundation in 16 sections• Pile foundation in 6 sections

ClientAKTOR S.A.

Retaining Wall

Retaining Wall T16PATHE Highway, Kakia Skala SectionCentral Greece

Typical cross sections

Construction of piles for the foundation of the retaining wall



Project2-floor underground parking facilities in 2-floor store building

Construction CostTotal cost: approx. € 0,3 m.

Project ScheduleDesign: 2005Construction: 2005 - 2006

Project DescriptionLength: 65mWidth: 40mDepth: 8m

Construction MethodPile anchored walls Modulation of excavation slopes with gradient 1:1 in 1 or 2 benches

GeologySoil materials (clay, clayey sand)Clayey marlAquifer

Our Services• Final detailed design • Construction drawings of the retaining structures

Construction Details• Construction of 3 pile walls: 15m up to 29m length with

reinforced concrete piles Φ0,8 of total length 6-8m, incombination with cap beams of height 1,1m and width0,9m

• Installation of shotcrete over the piles surface• Construction of drainage wholes• Construction of 6 pumping shafts with cross section

Φ800

ClientΑΚΤΟR S.A.

Underground Parking

Store Building with two underground parking facilitiesAttiki

Plan view of building excavations

Excavation section



ProjectRetaining wall for the construction of industrial building

Construction CostTotal cost: approx. € 0,2 m.

Project ScheduleDesign: 2006Construction: 2006

Project Description• Retaining wall at the east and south side of the

building• Modulation of excavation foot at a distance of 0,75m

from the wall and at a parallel direction• Modulation of excavation with gradient 7:1

(height: width) and max. height 13m• Backfilling between the slope and the retaining wall

GeologyThick-bedded to unsorted limestones

Our Services• On site geological imprinting• Modulation of rock mass urges and backfilling of the

retaining wall• Assessment and dimensioning of retaining slopemeasures

ClientΑΚΤΟR S.A.

Retaining Wall

Distribution Center ofProcter & GambleAspropyrgos, AttikiCentral Greece

Backfilling works of slopes modulation in the east side of the building

General view of the area of the building construction



Underground Parking

Viohalko BuildingAthens, Greece

ProjectUnderground parking facilities in nine-floor building

Construction CostTotal cost: approx. € 15 m.

Project ScheduleDesign: 2003Construction: 2003-2004

Project DescriptionWidth: 37mTotal Length: 100mDepth: 28m

Construction Method• Retaining structure with pile walls and prestressed anchors

GeologyMan-made deposits, soils, Athenian schist

Our ServicesDetailed Final Geotechnical Design

ClientELLINIKI TECHNODOMIKI S.A.

NE view of the construction

North view of the construction

Special Geotechnical Applications Complex Retaining ... piles Ø1.00/1.50m, length 11.00m with...

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