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Stuttgart’s urban railway network is being extended by 2.5 km this year, as the U6 line will run all the way to Fasanenhof.

In order to protect the surrounding residential areas, Getzner Werkstoffe is responsible for ensuring top-notch protection against vibrations. This will be implemented over a stretch of about two kilometers in the open cut sections and in tunnels.

As part of the planning process, the engineering office Beyer carried out a vibration study, the results of which made it clear that various kinds of vibration-mitigating measures were necessary.

As a result, the track construction company installed a total of around 7,000 m2 of ballast mats and 1,000 m2 of side mats made of the vibration-isolating material Sylomer®. The mats were installed on a compacted mineral subgrade and on the tunnel floor. For a 30-meter long stretch of track in a grass bed, a full-surface mass-spring system was also installed.

In the bored tunnel section, ARGE U6 Stadtbahnanschluss installed strip bearings for a mass-spring system on a 130-meter track section. The bearings, made of stiff Sylomer®, are 70 mm thick, with a width of 400 mm. Similar bearings have been successfully used for many years in various underground projects, such as the Munich subway network.