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The Köhlbrand bridge has been connecting Wilhelmsburg Elbe Island with the national A7 motorway since 1974. The bridge spans the 325 m wide Köhlbrand, an arm of the Süderelbe. The construction represents the second longest road bridge in Germany with a total length of 3,618 m. The bridge is divided in three intersections:
• Cable-stayed bridge (520 m)
• Two concrete adjoined ramp bridges on the east (2,050 m) and west (1,048 m) side
The east concrete ramp bridge is interrupted by two movement joints. They are located on top of the “Gerber” joints in axes 15 and 30. These joints are designed for a movement capacity of up to 760 mm.
A total of 81,000 cubic meters of concrete and 12,700 tons of steel were used to build the bridge. The construction was completed after four years and amounted to a total cost of 82 million EUR (160 million DM). In March 2014, a comprehensive rehabilitation of the bridge was launched. The bridge features four lanes and is used daily by approximately 30,000 vehicles.
In axes 0 (east) and 100 (west), the movements of the three bridge sections are recorded. These expansion joints have a movement capacity of up to 1,140 mm.
The expansion joints in axes 15 and 30 are located above the “Gerber” joints. Therefore they are not accessible from the bottom. Our QUICK-EX-System offers the advantage, that in the case of a damage, the expansion joints can be quickly removed without causing any work at the asphalt, concrete or sealing.
This method will not only assure long-term cost efficiencies, it will also guarantee a continuous smooth operation of an internationally important gateway.
The following services were carried out by mageba as general contractor for Axis 0 + 100:
• 17,60 m TENSA-MODULAR SILENT Type LR10 LS 100 with steel connection
• 17,60 m TENSA-MODULAR SILENT Type LR12 LS 100 with steel connection
• 170 m ROBO-DUR support ribs to prevent lane grooves (installed before and after the expansion joint constructions)
Reconstruction of the steel cross beams in the axes 0 and 100. The supporting edges of the original roller shutter assembly had to be removed and replaced by new load introduction brackets for the slat extensions. As a final step the total construction was re-welded to the end crossbeams.
TENSA-MODULAR LR8 „QUICK-EX-System“, TENSA-MODULAR SILENT LR8- LS100 „QUICK-EX-System“ with ROBO-DUR Stützrippen, TENSA-MODULAR SILENT LR10 / LR8-LS100 mit ROBO-DUR support ribs
Hamburg Port Authority (HPA)
Paul Boué, Egon Jux, Hans Wittfoht