TELT has awarded to the Joint Venture Itinera (leader), Ghella and Spie Batignolle the EUR 1.1 bn contract for CO3/4 lot for the excavation of the Italian Chiomonte-Susa section of the base tunnel under the new Lyon-Turin railway link project: This will be a 28.5 km tunnel.  

The involved sites will be at Chiomonte where the TBMs will be launched and at Salbertrand where the segments factory will be built.  

The 2 bimodal TBMs will be used for driving 18 km through 6 geological formations: first rock, then unknown ground below the water, which will require the use of a freezing technique and then there will be rock again. In the last 400 m in Susa, the serpentinites could contain a small percentage of asbestos. If this were the case, the rocks will be packed in big bags and stored in the Maddalena tunnel, without ever going outside.  

The first TBM will start in 2025 and will excavate 10.5 km, the second TBM will start in 2027 and will excavate 7.4 km.  

In Salbertrand an area of approximately 11,800 m2 will allow the storage of up to 1680 segments equivalent to 210 rings. The manufacturing plant will have a production capacity of 70 -105 segments per day.  The works will last approximately 91 months and will start after the formalization of the contract (1-1.5 months) and the issuance of the executive order (2 months). 

Contact Tunnel Euralpin Lyon Turin SAS, Le Bourget-du-Lac, tel +33 479685650, fax +33 479685683, email fonction.contrats@telt-sas.com. Visit https://www.telt.eu/ and http://ted.europa.eu/udl?request=Seek-Deliver&language=en&docid=753973-2023.  Ref. T13. 35/23.