Saint-Julien-Montdenis site

France - Tranchée couverte
France - Tranchée couverte

ENTRANCE TUNNEL TO THE BASE TUNNEL | WORK IN PROGRESS

Work on the cut-and-cover commenced in first quarter of 2019, namely the artificial tunnel that will be the entrance to the base tunnel at Saint-Julien-Montdenis in the Villard Clément area. It will take 32 months to complete the work.

Progress

01.08.2020
43%

TELT has broken down the work into three large phases for minimum interference with traffic on the surrounding main roads and motorways. This construction site is worth 32 million Euros.

IMG_0042_Copyright_Caroline_MOUREAUX
A functional work

The cut-and-cover is a surface concrete “box”, under the elevated platforms of the A43 motorway and the RD1006 highway. It was begun by moving the highway and motorway to the side of the current site in order to avoid interrupting the traffic, and excavating the ground to the desired depth. Subsequently, the floor and the side walls were built, and lastly the excavation was covered.

Data key

90 m of length

20 m wide

32 months of work

40 workers

News from the sites

La Praz
The first 9 km of the base tunnel completed

The excavation of the first 9 km of the Turin-Lyon base tunnel has ended: the “Federica” ​​boring machine has now broken down the last section of rock and has completed the first phase of the great European infrastructure.