The construction of Reinforced Earth® walls
for the South-Europe-Atlantique (SEA) high-speed line (LGV) linking
Tours to Bordeaux was completed in September 2014.
Eleven structures totalling 20 walls were built, mainly to support the railway tracks on both sides of flyovers.
The highest structure is 12.70 m high.
For two of these structures, the commercial speed of trains on the track is 320 km/hr.
For research and development purposes, a wall which support a track which will be trafficked with speeds up to 352 km/h (at the time of speed trials before the commercial opening of the line) was instrucmented in collaboration with IFSTTAR (the French institute of science and technology for transport, spatial planning, development and networks), to enable a better understanding of the diffusion of dynamic stresses within the structure during the passage of trains. These measures are planned for the second half of 2016.
In addition to the reduction of costs and faster operation, this type of construction offers a proven compatibility with the dynamic stresses introduced by the passage of trains.
Opening of the tracks is planned for 2017.
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