Strabag completes work on Brunau bridge
Schlieren ZH/Zürich - Strabag wird die Instandsetzung der Brunaubrücke über die Sihl im November abschliessen. Die letzte Bauphase umfasst Abdichtungsarbeiten sowie die Belagsfinalisierung und eine Behandlungsanlage für Strassenabwasser.
The Schlierem construction company Strabag has been working on the repair of the Brunau Bridge since February 2023. The bridge carries the A3 motor traffic over the Sihl. According to a media release, the work should be completed by the end of November. The final construction phase includes waterproofing work and the finalisation of the pavement. To complete the project, Strabag is building a road wastewater treatment plant (SABA) that will enable the bridge’s road water to be purified, the release said.
In September 2021, the Zurich City Council had approved CHF 3.76 million in committed expenditure for repair work on the Brunaubrücke bridge. The Brunaubrücke, which carries the Allmendstrasse over the Sihl, is an important motorway access road to the A3 and is also important for the Sihltal-Zurich traffic axis, the statement said. The 58-metre-long and 24-metre-wide bridge has two lanes in and two lanes out of the city. There are also footpaths on both sides on which bicycles are also permitted in mixed traffic. Various damages were found on the Brunaubrücke bridge, especially to the decking and the waterproofing.
The Brunau Bridge is a historic structure for Zurich and the Sihl Valley, says the Strabag press release: In the 1950s, the civil engineering office of the city of Zurich developed a project that led the Allmendstrasse over the Sihl. At that time, there was a large paper factory on the Sihl. The feeder traffic had to reach the factory on a suitable traffic axis. Construction began in August 1957. The company Ed. Züblin & Cie. (today Strabag) was commissioned with the entire civil engineering and concrete work. the bridge went into operation in 1958.