Author(s)

L. Montrasio

Abstract

This paper presents a simplified method for the assessment of the safety factor of slopes, potentially at risk of soil-slip (superficial plane sliding movements). These are slopes consisting of a bedrock and a thin superficial sheet of relatively weakly-bonded, primarily muddy soil with sand and clay interbedding. It deals with the hypothesis determining the definition of the safety factor deriving from the limiting equilibrium method, and with the factors contributing to put a slope at risk. The diagrams of the variation of the safety factor in time according to the variation of factors that most influence its course are presented. The analysis results highlight the decisive role played by pluviometric diagram and soil water downflow as the two key factors. Finally, an analysis has been carried out of the variation of the safety factor of a slope subject to soil-slips during the flood that hit the Pi

Keywords