Subsurface Investigation and Landslide Monitoring as a Basis for Planning Protection Measures - Case Study Doren Landslide -

Thomas FRANDL and Margarete WÖHRER-ALGE

Large or widespread slope movements are often characterised by a very complex interplay of various mass movement processes which are in turn caused by saturated water conductivity regimes in the underground that are difficult to assess or model. The planning of protection measures is therefore often met with great challenges. The importance of monitoring measures for determining protection measures is to be demonstrated using the example of the Doren landslide in Austria. The oral tradition about this landslide, situated on the orographic right hand side of the Weißach river, dates back to the year 1847. The first geological investigations, stabilization measures and monitoring measures were carried out after a mass movement in 1935. Due to unfavourable rock properties and a complex water regime, stabiliziation measures which were successfully implemented in other landslides in Austria failed in the Doren landslide. In the summer and autumn of 2014 two different systems to stabilize the head scarp of the Doren landslide were tested.

2018/1 373-379