Techniques

Ground anchors

A ground anchor is a load transfer system designed to transfer the forces applied to it to a competent stratum. An anchor is said to be temporary if it has a lifespan of under two years and permanent if the lifespan is over two years.


An anchor comprises three parts:
- The head, transmitting the anchor force to the structure via the bearing plate.
- The free length of tendon, from the head to the near end of the anchorage.
- The grouted anchorage, which is the length of tendon by which the tensile force is transmitted to the surrounding ground through the grout.



There are "active" and "passive" soil anchors:
• A passive anchor is only tensioned by the structure itself applying load to it. It does not usually have a free length of tendon. Generally speaking, the tendon is made of steel or an alloy.
An anchor is said to be temporary if it has a lifespan of under two years and permanent if the lifespan is over two years
• An active anchor is pre-tensioned before it takes up the load, which prevents distortion of the structure. The tendon is usually made of pre-tensioned steel cables.


Réalisations

Voie des Mercureaux - Head of Bois du Peu Tunnel

Work : ROAD STRUCTURES,TUNNELS | Year : 2004 | Location : FRANCE

Anchored walls to reinforce side embankments and portals of a double-tube tunnel head.

A449.pdf

Climespace Refrigerating Plant

Work : REHABILITATION OF STRUCTURES AND UNDERPINNING WORKS,URBAN EXCAVATIONS | Year : 2005 | Location : FRANCE

Special foundations for the construction of a refrigeration plant under the Palais de Tokyo in Paris.

A500.pdf

Isséane

Work : BUILDING,URBAN EXCAVATIONS | Year : | Location : FRANCE

Deep foundations works for a household waste treatment plant.

A498.pdf

Nile City - Cairo

Work : BUILDING,URBAN EXCAVATIONS | Year : 1998-1999 | Location : EGYPT

Retaining wall and foundations for 36-storey property with four basement levels.

A350.pdf

Oxygene tower, Lyon

Work : BUILDING,URBAN EXCAVATIONS | Year : 2007 2008 | Location : FRANCE

The 115m high Tour Oxygène building backs on to the Part Dieu shopping centre in the heart of the business quarter of Lyon.

A511.pdf

Industria Minerve

Work : URBAN EXCAVATIONS | Year : 2008 | Location : MONACO

Excavation with Berlin-type walls for the construction of 4 residential buildings with 267 parking places.

A521.pdf

Culture and Exhibition Centre

Work : BUILDING,URBAN EXCAVATIONS | Year : 1996 | Location : MONACO

A turnkey 17 000 m2 excavation.

A302.pdf

Carrefour Romarin - La Madeleine

Work : ROAD STRUCTURES | Year : 2006 | Location : FRANCE

Sensitive geotechnical works for the Grand Boulevard roadway drop.

A512.pdf

T 33 Tunnel

Work : ROAD STRUCTURES,TUNNELS | Year : 2005-2006 | Location : MONACO

Road tunnel excavated through rock, 55 to 85 m² excavated section

A510.pdf

Concarneau dry dock

Work : MARITIME WORK | Year : 2001 | Location : FRANCE

Design and construction as main contractor of dry dock, length 130m, width 27m, depth 10.80m.

A390.pdf

Baudoyer car park

Work : UNDERGROUND CAR PARKS ,URBAN EXCAVATIONS | Year : 1995 | Location : FRANCE

Design and construction of 5-level 320 place underground car park.

A311.pdf

McDermott Terminal

Work : MARITIME WORK | Year : 2009 | Location : MEXICO

Construction of a terminal for constructing and launching offshore oil platforms

A540.pdf

Brest - dry dock no1

Work : MARITIME WORK | Year : 2006-2008 | Location : FRANCE

Widening and modernisation of Dry Dock N°1 at the Brest Port de Commerce.

A477.pdf

Carré Royal - Reims

Work : REHABILITATION OF STRUCTURES AND UNDERPINNING WORKS,URBAN EXCAVATIONS | Year : 2006 | Location : FRANCE

Facades underpinning and creating a new excavation within the perimeter of the former Galeries Rémoises.

A523.pdf

Toulouse metro, B Line, Contract No 3

Work : METROS,RAILWAY WORKS,SHAFTS,TUNNELS | Year : 2001 - 2005 | Location : FRANCE

Construction of 1.1 km of tunnel, an underground station and 2 shafts.

A528.pdf

Larvotto hotel complex

Work : BUILDING,URBAN EXCAVATIONS | Year : 2003 | Location : MONACO

Deep foundations constructed on a quay reclaimed from the sea which comprised loosely placed larger rock ballast to form the embankment.

A439.pdf

Port 2000 quayside 1 to 4

Work : MARITIME WORK | Year : 2001-2005 | Location : FRANCE

Realisation of the first 4 quayside berths for Port 2000 operation (1,602m of length)

A462.pdf

Provence Opera building

Work : UNDERGROUND CAR PARKS ,URBAN EXCAVATIONS | Year : 1992 | Location : FRANCE

Heavy duty, composite material ground soil anchors.

A204.pdf

Rivière des Pluies viaduct - Saint-Denis, La Réunion island

Work : ROAD STRUCTURES | Year : 2006-2007 | Location : FRANCE

Foundations of the viaduct and protection of the embankment works.

A530.pdf

Safina Dry Dock - Hydrolift

Work : MARITIME WORK | Year : 2005 - 2006 | Location : UNITED ARAB EMIRATES

The Dubai Drydocks naval shipyard has extended its capacities by commissioning a hydrolift for the construction and repair of floating equipment. This structure was entirely completed by Soletanche Bachy acting as the main contractor under a design and build contract.

A509.pdf

Monacan institute of sports medicine

Work : BUILDING,URBAN EXCAVATIONS | Year : 2005 | Location : MONACO

The construction of retaining walls 38m high in a cliff and earthworks tunneled with explosives.

A451.pdf


Voyage au coeur de l'ingénierie de pointe

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