Design of Telt - Interchange niches “Maddalena Tunnel”
Client
TELT: Lot CO4A. Interchange niches “Maddalena Tunnel”
Location
Chiomonte (Turin), Italy
Status
In progress
Services
Executive design
Technical Information
Lot CO4A. Interchange niches (23) as recesses along the exploratory tunnel, "Maddalena tunnel", for the Lyon-Turin line
The work is part of the larger TELT project, the High Speed/High Capacity line planned under the Alps to connect Turin and Lyon, an important piece of the Trans-European Transport Network (TEN-T), the European Union's ambitious sustainable mobility initiative to connect the continent's rail networks and increase the transport of people and goods by rail instead of road.
The Maddalena tunnel, located in Chiomonte (Turin), is one of the construction sites of the Italian side of the Turin-Lyon railway line. It was created as a geognostic tunnel with the aim of providing the geological information useful to proceed with the excavation of the base tunnel on the Italian side of the TELT railway line, which will connect Turin with Lyon.
The construction site variant that moved the excavation of the base tunnel from Susa to Chiomonte has been approved. The site will be used not only to conduct a geological survey of the rocks, but also for the construction of 22 niches to adapt the tunnel to the passage of construction vehicles.
The niches, given the small size of the tunnel, will be 30 to 65 meters long, about 4.50 meters deep, and will allow vehicles to cross safely. They will be excavated with traditional methods over a period of 20 months, and will be used for service access for vehicles and equipment that will operate in the construction site of the base tunnel. The intervention also includes the formation of a driveway preparatory to the execution of the work, and laying of the coating of the first phase along the entire development of the tunnel.