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.
Railway tunnel provides a modern connection of Zaventem airport close to Brussels to the European high-speed railway system and to E 19 motorway.
Tunnel construction in a very restricted area requires a multitude of construction methods to carry out the structure with as little interference as possible with the neighbourhood.
Biggest individual construction project within the scope of the traffic project Deutsche Einheit (German unity) 8.2 New section Erfurt – Leipzig/Halle.
Simultaneous drive of two tunnel tubes with two EPB shields for the high-speed Channel Tunnel Rail Link.