The official TELT website has changed: from August 2022, telt-sas.com becomes telt.eu. If you have any problems or need help, please contact us.
DECLINE AND BASE TUNNEL | 14,7 KM | WORK IN PROGRESS
After a first phase of activity between 2003 and 2010, the work is resumed from 2015 for the excavation of the second descent. From summer 2016 until September 2019, the TBM Federica dug 9 km in the axis and diameter of the south pipe of the base tunnel.
The construction of the 9 km-long geognostic tunnel, with the traditional 1.5 km-long section digged into the carboniferous fault, has made it possible to gain a better understanding of a geologically sensitive area in view of the final works.
The TBM boring this tunnel was designed to tackle certain specific geological characteristics of the area. Made in France, at the NFM Technologies facility in Creusot (Saône-et-Loire), it is fitted with an 11.26-metre-diameter head that holds 76 cutters and has a power of 5 Megawatt, the equivalent of 8 Formula 1 engines. The TBM’s average progress was 10 m per day.
TELT, while maintaining the leadership of the project, entrusted the work to a grouping of enterprises that includes six companies – three French and three Italian – specialising in public works, led by Spie Batignolles TPCI. Between the grouping of companies, the contractors and the subcontractors, the construction site employed 480 people.
8.700 m of tunnel to excavate with the TBM
+4.000 visitors until 2019
1.3 millions of rocks to be excavated
480 people employed during peak phases
The companies of the UXT consortium, led by Itinera, signed the Sustainability and Security Pacts with TELT.
The contract worth EUR 1 billion was awarded to the binational group of companies composed by Itinera (agent), Spie Batignolles and Ghella.
SNCF has awarded the tender for the above-ground works between the Lyon-Turin base tunnel and the historic line.
At Saint-Julien-Montdenis, work began on the French entrance of the Mont Cenis base tunnel.
By continuing to use the site, you agree to the use of cookies | Continuando ad utilizzare il sito, accetti l'uso di cookie | En continuant à utiliser le site, vous acceptez l'utilisation de cookies | PLUS
The cookie settings on this website are set to "allow cookies" to give you the best browsing experience possible. If you continue to use this website without changing your cookie settings or you click "Accept" below then you are consenting to this.
