System structure with Gussasphalt on bridges

The Western Bypass Zurich, as a link between the A1 motorway [Zurich-Berne] and the A3 motorway [Zurich-Chur], as well as the future A4 motorway [Zurich – Central Switzerland] is a structure of national importance. It relieves several agglomeration municipalities of the commuter traffic and the city of Zurich of the transit traffic. The commissioned two twin bridges, as part of the Western Bypass, will be constructed with two lanes and one hard shoulder.

Execution of the waterproofing and Gussasphalt paving work was carried out in a managed lane system with a continuous paving sequence. Because of the new construction, the individual bridges were installed to a total width of approx. 10.0m, excl. verge, without joints. The leg lengths were between 333m and 495m.

Despite demanding gradient conditions [slope line 9%] at changing laying thicknesses, the waterproofing and paving work was conducted in a high quality. As the entire bridge areas were available without restriction, the construction programme was shortened by approx. 1 month overall.