Product name: 

Kortazar tunnel. Sector 3 of Vitoria-Bilbao-San Sebastián High Speed Line (Spain).

Description: 

Tunnel project: 1901.60 m long, with an evacuation gallery to the outside, two viaducts, and a pile wall at the tunnel entrance. Excavation was carried out in phases, given the average cross-section of 63 m² during the advance and 45 m² during the bench.

Web: 

https://www.nortunel.com/