Final breakthrough in the Vispertal Tunnel
On 22nd August 2016, excavation of the northern tube of the Visp tunnel was at last celebrated as the final section of the breakthrough. The two tunnels joined together after 1,026 and 1,509 metres of excavation work in the geologically-challenging Rhone-Simplon fault zone on the edge of Branch Construction Site I, where a loose rock fall back in January had delayed the driving works. However, tunnellers were now also able to successfully tackle this last section without any incidents.
The final driving works will soon be completed on the side wall and base. Having achieved this milestone, the site is now preparing to install the vault cladding in the northern tube – work on this had already started in the southern tube back in April 2016.