Currently the project „Marieholmstunnel“ is underway in the city of Gothenburg, Sweden. This project is to provide for an additional 3 traffic lanes (in each direction) as a downtown crossing of the river Göta Älv. These works are expected to significantly alleviate existing traffic congestion on both the adjacent Tingstadtunnel and bridge crossings.
The Marieholmstunnel is designed with a cross section of approx. 30 x 10 m. The middle section of the tunnel has a length of approx. 300 m and will be constructed as an immersed tunnel. The immersed tunnel is designed as 3 independent tunnel elements, each of approx. 100 m.
Each of the tunnel elements is constructed in a dry dock environment incorporating 22 (No.) bonded post-tensioned tendons. The post tensioning works were chosen on the project to guarantee both the stability and crack width control during the relocation of the tunnel element (swimming and lowering procedures). When brought into correct position the tunnels will then be immersed within a prepared channel dredged on the river bed.
BBV Systems commenced post tensioning works of the first element in the beginning of 2017, with works expected to be completed by mid-2018. The final completion of the tunnel and hand over to the client Trafikverket is scheduled for the end of 2020.
Contractor: Züblin Scandinavia AB
Design: ARUP – TEC – Centerlöf & Holmberg