TELT, CO08 - Villard Clément

Short description

Construction of the base tunnel from the Villard Clément portal attacks.

The project

The cross-border section of the new Lyon-Turin line is a new railway line of about 67 km connecting Saint-Jean-de-Maurienne with Susa in Italy and Bussoleno, where it joins the historic Turin-Modane line. In particular, the line requires the construction of a 57.5 km long twin-tube tunnel with one track in each direction, the so-called "Montcenis base tunnel", as well as the construction of a twin-tube tunnel of about 2 km between Susa and Bussoleno, the so-called "connecting tunnel".

On the French side, the civil engineering of the base tunnel is divided into 4 Operational Worksites (OW), numbered from 5 to 8, including OW 08 "Construction works on the base tunnel from the Villard Clément portal".

Services in detail

This civil engineering contract includes the realisation of :

  • The open space structures on the Villard-Clément platform, including the cut between the existing cut of Lot 9a to the west and the spandrel of the excavated tunnel to the east.
  • The two tubes of the base tunnel in the direction of Saint-Martin-la-Porte, i.e. 2839 m, 509 m of which are screen vaults in already consolidated ground (jet grouting), mark the beginning of the base tunnel. The rest of the excavation was carried out using traditional blasting methods.
  • Communication branches between R0 and R1 type tubes contained in this line, i.e. 11 units on the probable line,
  • The niches contained in it are probably linear, i.e. 6 units,
  • The installation of external conveyor belts for the removal of materials.

Task

Planning and execution of the work

Type of work

  • Earthworks
  • Jet grouting
  • Micro-Berlinoise
  • Umbrella vault
  • Tunnel lining and covering
  • Cutting and covering

Construction

Traditional blasting

Further information

Construction time - dates

2021-2027

Contract amount

228 M€

Own share

34%

Use of the book

Railway line

Construction methods

Traditional blasting

Main works and features

CO08 :

  • Earthworks (300,000m3)
  • Jet grouting (28 500m)
  • Micro-Berlinoise
  • Umbrella vault (509m)
  • Traditional excavation (blasting) and tunnel lining (2x2809m) + 11 frames
  • Covered trench (137mm)
 

Customer

TELT

Master builder

INALPAGE-Gruppe bestehend aus EGIS (Leiter) - INGEROP - ALPINA - GEODATA

Transferring person CEE

-

Name of the grouping

IMPLENIA - NGE - ITINERA - RIZZANI de ECCHER

Person responsible for the grouping

M. Alain RICHELY

Composition of the grouping

IMPLENIA (34%)

NGE (25%)

ITINERA (25%)

RIZZANI DE ECHER (16%)

The role of Implenia in the group

Agent

Own share of grouping

34%