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
Landsberger Straße Sewer System Rehabilitation, Section 2, Munich
2 parallel tunnel tubes with a length of 1.645 km each, inner diameter 10,15 m; 6 cross passages driven under the protection of ground freezing; 2 access ramps, which at the same time function as start and target shafts, Passing under A4/A133 motorways incl. connection to existing infrastructure
