myGeobrugg
Initial situation
The rockfall problem at La Roche-Blanche came back to memory in Summer 2019 when large blocks detached from the limestone cliff above the village of La Roche-Blanche. They stopped in the nearest garden without causing much damage. Subsequently, the village ordered a survey of the rockface. The conclusion of this survey on the 22nd of December 2019 detailed the presence of a large fracture with the potential of imminent failure. A total of 1700 m³ was estimated to potential fail. It was decided to evacuate temporarily the residents living closest to the rockface, a tough decision to take just before Christmas.
Description
The authorities opted for a two-fold solution with a custom-made rockfall curtain just under the steep slope and a rockfall protection barrier RXE-5000 beneath it.
The construction of the rockfall curtain had just been completed, and the posts of RXE-5000 set, when most of the unstable volume, 1500 m³, collapsed in mid-February. The rockfall curtain held back most of the material, nevertheless some parts of the ringnet barrier were damaged. After replacing parts, the installation was finally completed in March 2020.
Customer
Contractor
Protected object
Building, Residential area
Corrosion protection
GEOBRUGG SUPERCOATING
Engineering
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