Sener has provided assistance in the tender of two turnkey contracts on tunnels in Norway for the future high-speed Follo Line, which will connect the Norwegian capital with the city of Ski. There will be a total of 22 km of double track of which 19 km will run through a twin tunnel, making it the largest in the country.
The first contract is for the conventional tunnels and will include the civil engineering work for a triple track tunnel (140 m), the new inbound Østfold line (1,200 m), and D&B of the two twin tunnels (530 m), as well as crossings under several roads and oil transport tunnels and a change of routing of the Alna River.
The second contract is for tunnels to be dug with tunnel boring machines (TBMs) and covers the civil engineering work and the electrical, mechanical and telecommunications systems for the 19 km twin bore tunnel, the assembly caverns for the TBMs and tunnels for the rescue station, located in the Asland area.