South Europe Atlantic High Speed Railway Line Tours – Bordeaux, France

The Tours-Bordeaux South Europe Atlantic (SEA) HSL is the first High-Speed Line project based on the Public- Private Partnership (PPP) model in France. It will involve 340 km of new line, including 302 km of high-speed line and around 40 km for connection to the existing line. With the aim of commissioning in 2017 for a concession period of 50 years, various preparatory works and studies necessary for the first construction operations have been underway since 2010.

TERRASOL has been taking part in this project since the summer of 2011 on several geotechnical construction missions (G3) to assist various teams in the design and construction sub-group COSEA:

  • Standard (52) and specific (4) civil engineering structures of section B (work sections 3 & 4);
  • Viaducts (4) with prefabricated segments crossing the Auxance, the Indre and the Claix rivers (with taking into account of the karstic context);
  • Hydraulic retention tank in Ambarès-et-Lagrave;
  • Soil reinforcement under the Dordogne Valley embankments.

Terrasol’s achievements:

  • Design of standard civil engineering structures
  • Design of 4 viaducts
  • Design of the foundations for a retention tank
  • Design of soil reinforcement for a large embankment on soft soils
Characteristics
PERIOD :  2011 - 2013
Owner : LISEA
General Contractor : COSEA-C
Client : COSEA-C
Main specifications :  

  • High Speed Railway Line: 302 km
  • 500 Civil Engineering structures

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