Tunnel du Mont-Sagne
In the Mont-Sange Tunnel, as in the Loges Tunnel, the brick lining is being demolished over a distance of approx. 140m and replaced with a shotcrete lining. Somereprofiling work still have to be carried out, work which could not be done during the first phase of work due to the electric rail installations.
Tunnel de Combe Convers
The Combe-Convers tunnel will be completely renovated during the 5-month construction period. For this purpose, the two portals will be reinforced with a pipe umbrella vault, steel girders, and a concrete vault will be constructed on the first 2 meters. The cross-section of the 250 m long tunnel will be widened between about 50cm to 1m, secured with shotcrete and sealed with a spray seal. After the building of the invert and the verges, the track ballast is already being placed again. After a snowy start, the works are on track and the various works have to be finished before the next snow falls again.
You can find more exciting facts on the reference sheet.