Mont Cenis Base Tunnel
France, / Italy, St-Jean-de-Maurienne / Susa
2023 – today

57.5 kilometers will be the length of the twin-tube Mont Cenis Base Tunnel, which will become the heart of the new rail link between Lyon (France) and Turin (Italy). The Lyon-Turin rail link is, in turn, part of the Trans-European Network - Transportation (TEN-T), a section of the Mediterranean Corridor linking southern Spain with Hungary.

The tunneling consortia commissioned by the client, the French-Italian project company "Tunnel Euralpin Lyon Turin (TELT)", have so far ordered five tunnelling machines from Herrenknecht. For Lot 2 "Saint Martin - Villarodin / Modane", Herrenknecht will supply three Single Shield TBMs (Ø 10,340 mm) each for 8,300 meters of driving through hard rock. For the neighboring lot 1 "Villarodin / Modane - Val Clara", two Gripper TBMs (Ø 10,430 mm) will be used, each boring 18,000 meters.

The first two factory acceptances for Lot 2 were successfully completed in July and October 2023

Data Sheet

Country, Location

France, / Italy, St-Jean-de-Maurienne / Susa


2023 – today




Hard rock

Tunnelling length

47,400 m

Machine Data

3 x Single Shield TBM
Diameter: 10,340mm
Lining method: Segemntal lining
Cutterhead drive power: 4,500kW
2 x Gripper TBM
Diameter: 10,430mm
Lining method: Rock support
Cutterhead drive power: 4,900kW

Your contact person Contact us

Steffen Dubé President and General Manager Herrenknecht Tunnelling Systems USA Inc.
Gerhard Goisser Commercial Manager Herrenknecht Tunnelling Systems USA, Inc.