Turin – Modane Railway – Modernization of the Frejus tunnel

— Project Description:

Due to the increasing traffic in last decades, the upgrade of the double-track tunnel was an urgency. The modernization of the Frejus Tunnel in the Italian side (8.5km) consisted of lowering underground the actual rail level by approximately 60cm and upgrading the technological apparatuses. After complex interventions of profile widening, consolidations of the structures and safety interventions, it was then possible to transport heavy trucks on train. All works relating to the civil engineering and the update of the installations were done by maintaining one rail under complete operation.

— Description of Services:

Critical analysis of the tender design, 3D profilometric surveys of the existing tunnel, geological and geotechnical investigations, detailed design of civil works and MEP of the interventions for the lining rehabilitation, detailed design of the section enlargement for lowering the rails, detailed design of the safety installations. Technical assistance during construction.