2. Site reconnaissance
2.1 Geology and geomorphology
Some geological formations are renowned for their frequently unstable slopes:
Lias black marls in Lorraine, Burgundy and Aveyron;
Gault clays in Normandy ;
Varved quaternary clays south of Grenoble, etc.
The first step in a slope stability study is to establish the geological structure of the site: nature of the bedrock, thickness of surface formations, presence of faults, etc. It is important that the geological study extends over a wider area than the precise location of the unstable zone. It is important that the geological study extends over a wider area than the precise location of the unstable zone....
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Site reconnaissance
Stability calculations
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