4-Lane-Road-Tunnel Waltershofer Damm, Hamburg, Germany

Southern portal of the structure Client: Free and Hanseatic City of Hamburg Construction Costs: approx. 12 mill.€ Service: General planning, project management, construction supervision Period: March 1998 - early 2001 Cooperation: Joint Venture Unterführung Waltershof

Frequent traffic jams characterised the main land access to the two largest container terminals of Hamburg Port (Burchardkai and Eurokai) because of a level road railway crossing close to the gates. Therefore a 4 lane road tunnel has been built.

The total length of the structure is 248 m (70.5 m tunnel and 82.0 m resp. 95.5 m ramps).

The tunnel structure is formed by a closed reinforced concrete frame supported by concrete piles. A concrete wall separates the lanes in the tunnel section supporting the railway bridge. The span of the tunnel varies in the range 20 24 m because of the S-curved alignment of the overall structure.

The tunnel base level is NN 7.0 m, a storm water detention basin has been constructed with its base at NN 5.0 m.

Large circular openings in the mid concrete wall provide transparency supported by an illumination concept.

The project was declared as Structure of the Year 2002 by the Association of Architects and Engineers, Hamburg.

Sellhorn was partner of a tracking joint venture and responsible for the engineering design including foundation, storm water detention basin and railway trading. In addition Sellhorn served during design and implementation as Project Manager.