Penultimate shifting cycle of the Overfly bridge over the Nuremberg East motorway junction successfully completed

The penultimate shifting cycle of the Overfly bridge structure was successfully completed by the Donges SteelTec assembly team.

The so-called extradosed bridge was moved into its final position using the incremental launching method. The steel superstructure of the bridge is prefabricated in sections at one end of the bridge on the pre-assembly site. From there, it is then moved to the opposite end of the bridge.

The incremental launching method makes it possible to avoid interfering with traffic as far as possible, as the bridge is moved across the motorway junction above the clearance of the lanes.

The Overfly bridge, including the already installed pylons and cables, is shifted in 6 cycles with a maximum shifting distance of 115 metres. The 50-metre-long stem spade bridges the free spans during the shifting process and compensates for the deflection of the bridge due to its own weight when it hits the next pier. Shifting takes two days per cycle. It takes place on special shifting rockers and is carried out with the aid of special shifting plates that allow the steel structure to slide forwards successively. This allows the shunting load that the hydraulic presses have to apply to be reduced accordingly.

The composite steel construction, which is 588 metres long in total, spans the individual support spans of 115 metres impressively with a total of 5 pairs of pylons. Up to 55 stranded cables form the cables of the stay cables. A total of approx. 8,600 tonnes of steel will be used for the 588 m long bridge.

The components of the 6th cycle will be assembled over the next few months. The final shifting will take place in autumn 2024.