City rail tunnel Karlsruhe

Lowering of an existing tram in the centre of Karlsruhe

When public transport reaches its limits

Due to the continuous expansion of the local transport network and the accompanying increase in the number of passengers, the transport hubs in Karlsruhe’s city center have reached their capacity limits. Relief with further future growth potential is only offered by the underground relocation of the existing tram over a length of approx. 4.6 km with seven stops and the construction of an above-ground tram with three stops with a corresponding lowering of the road traffic over a length of approx. 1.6 km . This overall project is referred to as a combination solution.

The role of GC GROUP

The executing consortium commissioned the “Planning Community Stadtbahntunnel Karlsruhe” with the execution planning (structural planning) for the south branch. GC GROUP was in leading in the planning community. The planning included the securing of the construction pit in the inner-city area with adjoining development as well as the engineering structures within the construction pit with a section tunnel in the open construction method and stops in the cover construction method. In the course of the planning, groundwater models of all stops were also calculated for the construction dewatering.