- Client: ERE – EIFFAGE RAIL EXPRESS
- General Contractor: CLERE – CONCEPTION LIGNE EIFFAGE RAIL EXPRESS
- Assignment: Mission G2: Study of earthworks + foundations OA (design); Mission G4
- Total cost of work: €1,538k
- Completion date: 2011-2015
PROJECT DESCRIPTION AND CHARACTERISTICS
The high-speed line (LGV) Bretagne – Pays de la Loire is an extension of the LGV Atlantique Paris – Le Mans. It crosses the regions Brittany and Pays de la Loire and the departments of Sarthe, Mayenne and Ille et Vilaine. The total length of the route is 182 km plus 32 km of connection to the existing network. As part of its participation, GEOS worked on the 30km section B from Laval to Vitré.
ASSIGNMENT
GEOS conducted G2-AVP & PRO studies in the design phase. The studies include:
- definition, monitoring and control of geotechnical investigations;
- earthworks (stability of earthworks, reuse / recovery of materials, design specifications, geotechnical models);
- engineering structures (type of foundation, design specifications, etc.);
- the Vicoin estacade (an engineering structure consisting of nine spans with a total length of 260m).
The design mission was complemented by a supervision of geotechnical mission G4, including supervision of studies (VISA) and supervision of execution follow-up (DET).
