lpetrich wrote: ↑Mon Nov 08, 2021 9:54 am
- Lot 3: 3 km of tunnels(?) between the entrance portal at Saint-Julien-Montdenis and Saint-Martin-de-la-Porte.
Regarding the ? :
If you look at the drawing here : https://www.pini.group/en/pini/news/TELT-News/TELT1
Lot 1 is the 21.8 km tunnel section between
the two lateral connection tunnels marked Villarodin-Bourget Moudane and La Maddalena, i.e. the cross-border section.
Lot 2 is the part with the red, blue and green arrows. Between Saint-Martin-la-Porte and La Praz a 9 km-long exploration tunnel has been separately dug already, finished in 2019. The lot is about expanding this construction (along 23 km length) for the full two tunnels as well as for the La Praz emergency stop. Construction for these starts from sideways access tunnels that were also already dug - i.e. not from the entrance portal.
Lot 3 is about simply building the part between Lot 2 and the entrance portal. This section will also have a different gradient than the main tunnel.
The 9.4 km section from La Maddalena over to La Susa is the "Italian Lot" that hasn't been awarded yet.