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
Twin-tube road tunnel under the River Thames, 2 x 1,400 m long, internal diameter 10.66 m, external diameter 11.45 m, Access ramps, 600 m in length
Storage sewer at Berlin's Mauerpark will prevent sewer overflow into the Spree and Pranke rivers in the future.
New storage channel in Brussels East stores up to 8,000 m³ of rainwater and provides relief during heavy rainfall.
A new sewerage canal through the southwest of Munich relieves the existing canal system.