Mechanised tunnelling
In the past Wayss & Freytag was significantly involved in the development of mechanized tunnelling techniques. For example, they initiated the support of the tunnel face by means of a bentonite suspension and air-cushion. With the so-called “slurry shield” this technique was brought to operational maturity. Wayss & Freytag is a pioneer of this technique and has in the meantime driven more than 150 km of tunnel using slurry shields. In addition, more than 80 km of tunnel were driven using earth pressure balance shields and 30 km using hard rock TBMs.
Related Projects
New traffic connection for Paris. Europe's largest infrastructure project improves transportation networks in the greater Paris area.
Second Main Line of Munich Suburban Railway Germany
Due to swelling events and the associated heave and damage to the tunnel inner lining, it was planned to install protective netting in the area of the tunnel roof and the upper side walls.