Fels- und Hangsicherung in Mauel Strecke 2651, km 59,345 | Bauleistung KIB

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Rock and slope stabilization in Mauel Section 2651, km 59.345 Deutsche Bahn plans the stabilization of a rockfall-prone rock and slope embankment along DB line 2651 (Cologne-Deutz – Berzdorf) in the section between rail km 59.344 and km 59.387, south of the Mauel tunnel. This is a single-track, electrified main line with passenger and freight traffic, running in the section Windeck-Nord – Windeck-Süd. Following special assessments after several rockfall events, it was determined that the affected rock section shows significant instability due to the weathering of the underlying sandstone and unfavorably oriented, partly widely opened fracture sets. These geological structures promote both sliding and tilting movements of individual rock bodies. Additionally, frost-thaw cycles and root pressure from vegetation act destabilizing and promote the progressive weakening of the rock. At several locations, fresh detachment traces and recent fall events have been documented, repeatedly affecting the operational safety of the line. Based on the geotechnical assessment and the stability analysis, securing the rock cut is recommended. The planned measures include the installation of a…

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