Infrastructure,
Tunnelling,
Transport tunnels
TELT, CO08 - Villard Clément
joins the historic Turin-Modane line. In particular, the line requires the construction of a 57.5 km long twin-tube tunnel with one track in each direction, the so-called "Montcenis base tunnel", as well as the construction of a twin-tube tunnel of about 2 km between Susa and Bussoleno, the so-called [...] cut between the existing cut of Lot 9a to the west and the spandrel of the excavated tunnel to the east. The two tubes of the base tunnel in the direction of Saint-Martin-la-Porte, i.e. 2839 m, 509 m of which are screen vaults in already consolidated ground (jet grouting), mark the beginning of the base[...]