Nachträgliche Verankerung von Querspanngliedern

Subsequent anchorage of transverse prestressing cables clamping devices to rebuild Deelböge Bridge

In a collaboration of the Agency of Roads, Bridges and Waters of the Free and Hanseatic City of Hamburg (LSBG), the Grassl Consultant Engineers and the Institute of Concrete Structures at the Ruhr-University of Bochum, a clamping device to subsequently anchor transverse prestressing bars is developed. It transfers the released prestressing forces via shear friction to clamping steel plates and then by direct compressive contact to the surrounding concrete. The device is applied to stepwise rebuild the Deelböge Bridge in Hamburg continuously ensuring an ongoing traffic on one side of the bridge during building activities. The contribution lays out the conceptual design of the bridge rebuilt, the theoretical and technical elaboration of the clamping device as well as its successful application on site.