Bad Zurzach eastern bypass

The bypass around the historic "Flecken" district increased the attractiveness of Bad Zurzach as a place to live and work. Basler & Hofmann was responsible for the overall management of the project from the preliminary project to commissioning. A new two-lane road around one kilometer long was built for the bypass in the east of the town. This directs north-south traffic out of the town center. As the route lies in a slope cut, a permanently anchored retaining wall had to be built over a length of just over 100 meters. The heart of the project begins after the retaining walls: a 527-metre cut-and-cover tunnel, which is also located in the slope. The cut-and-cover method was chosen as the construction method. A total of 1,143 in-situ concrete bored piles served on the one hand as excavation support and on the other as walls for the tunnel. An approximately one and a half meter thick, partially transversely prestressed tunnel ceiling was built on the bored piles. The tunnel could be excavated under the "protection" of this. A meeting zone with paths for pedestrian and bicycle traffic was created on the tunnel.

An SBB railroad bridge also had to be replaced as part of the new construction. A particular highlight during the construction work was the lifting of the new 210-tonne trough bridge with a span of 17 meters during a weekend closure.