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.
A first in the Netherlands - TBM drive in the city centre: Hubertus tunnel, the longest inner-city road tunnel in the Netherlands, completes the Northern “Randweg” of The Hague.
Six kilometers of rail tunnels under the city center of Gothenburg, Sweden are the heart of the West Link Project - creating new connections.
The State of Queensland in Australia expects new urban development and economic opportunities from the Cross River Rail infrastructure project. Wayss & Freytag Ingenieurbau is involved in this ambitious infrastructure project.
Connection of the Düsseldorf main railway station with the airport, the Düsseldorf trade fair center and the Airport City business park, construction of an underground railway station at the airport terminal.