First ICE Trains Roll Over Filstal Viaduct

New landmark in Baden-Wurttemberg nears completion

The newly built DB railway line between Wendlingen and Ulm crosses the Filstal valley. For the project participants, the required viaduct presents special boundary conditions because of the tunnel-bridge-tunnel sequence within the existing topography of the Filstal with its very steep valley sides. 

The connecting tunnels with 30 metres track distance require two independent bridges. Thus, two single-tracked bridge structures have been designed as jointless continuous girders of 485 m and 472 m length, reaching over six spans and built by semi-integral construction method. In the area of the Y-shaped main piers, the arch is shaped with flatly inclined oblique struts. The superstructure is a single-cell hollow box, prestressed in longitudinal direction and mildly reinforced in transverse direction. The third highest railway viaduct in Germany crosses the Filstal valley with a clear height of 75 m. The larges span width amounts to 150 m. 

A big challenge during design and construction was the formation of the monolithic connections as well as the longitudinal force distribution of the semi-integral structure with its slender piers.  

The chosen construction method planned to erect the superstructure in sections by means of a launching truss on temporary towers as intermediate support during construction. After completion of the superstructure, the oblique struts were concreted on a suspended scaffolding; at the connections to the superstructure self-compacting concrete was used.  

The project will soon be completed – at the end of 2022 both tracks will be operated. Currently, high-speed tests are run on the right track bridge, and the left track’s superstructure is under construction. 

More information about the project can be found here.