Tunnelling,
Topics and projects
ceremonial breakthrough safety tunnel Cholfirst
Impressive key data for the safety tunnel since construction began in September 2020: around 45,000 man-hours , 4,800 grout anchors and 2,800 m3 of shotcrete were required to excavate the approximately 22, 000m3 of rock for the 1090m-long safety tunnel and the associated 6 connecting tunnels . Guido Biaggio, Vice-Director of FEDRO and Head of the Infrastructure East Division, […]