2018 Cologne Cathedral / Main Station Renovation Project
Comment: The cathedral wobbles, but it does not waver.
The cathedral vibrates. Every day. For centuries. Or at least since the central station was built next to it. And because the suburban and intercity express trains roll across the Hohenzollern Bridge. It gets shaken and jolted and has even survived earthquakes. And now it's receiving more shaking and jolting, because underground line 5, which opened five years ago, runs underneath it, producing measurements from earthquake researchers.
From 2013 until September 2018, line 5 ran through an old underground tunnel that had been unused for years. The KVB had to travel more slowly on the short stretch to the Town Hall to avoid vibrations. The tracks in the central Cathedral / Main Station underground station were about twenty years old. That made track renovation unavoidable.
In the process, the track beds were completely excavated, section by section, and fully lined with profiled Calenberg USM® 1000-W track bed mat, which was also used as the side mat. USM 1000-W was developed especially for challenging situations of this kind and was proposed for the renovation by a renowned building dynamics firm. This measure reduces the entry of harmful energy into the train tracks and substructure, so the immediate surroundings remain spared from disturbing vibrations and structure-borne sound. Furthermore, this ensures a long service life for the track and a consistently good track position. Platforms in the underground stop will be renovated and points will be replaced at the same time. To this end, the central Cathedral / Main Station stop will remain closed over the entire autumn holiday. The work is scheduled for completion on 29 October 2018.
The project has also attracted considerable attention in the media. For example, WDR broadcast a television report on 15.10.2018. The Cologne Cathedral master builder also inspected the implementation on 15.10.2018 and explained that he found the renovation of particular interest, because the area to be renovated was at the same elevation as the cathedral treasury.
Calenberg Ingenieure GmbHAm Knübel 2-4
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