Hjertet av Zürich-prosjektet

The new underground transit station at Löwenstrasse forms the heart of the Zurich Cross-City Link. Positioned 16 meters below the existing tracks, the station was built during normal railway operations, presenting significant challenges for all involved.

Cut-and-cover metode brukt

To allow railway operations to continue, the cut-and-cover method was employed for the construction of the underground station, with the excavation pit secured primarily using diaphragm walls. The project faced additional logistical difficulties due to the busy main train station and constrained working heights of less than 7 meters in some areas.

Håndtering av Sihl-elven

The Sihl River flows beneath the transit station, necessitating the draining of some river sections during construction. To ensure groundwater flow after the station's completion, three culverts were installed through the structure. Extensive jetting and injection work were also required to underpin the old station building and create a sealing block in the tunnel boring machine's access zone.

Omfattende tekniske detaljer

Detailed services included the installation of 16,200 square meters of diaphragm walls, 13,150 meters of micropiles, and 3,500 meters of temporary anchors. Large and small filtering wells, totaling 2,040 meters, were also installed. Additional works involved 2,000 square meters of concrete infill for underpinning, 1,500 square meters of injection sealing walls, and 500 square meters of jetting.

Fullført til rett tid

The project's complex nature stemmed from the limited space, the need to maintain railway operations, and the necessity for shift work around ongoing railway traffic. Despite these challenges, the project was completed on time, with construction starting in May 2008 and concluding in October 2011.