Abstract: Slope stability is a relatively complicated problem in geotechnical engineering. Among many factors that affect the slope stability, water is the main inducing factor that affects the slope instability. This paper presents the analysis of the landslide in a soft rock slope and its mitigation methods. The results show that the infiltration of rainwater caused the increase of the moisture content in soil and the sharp decrease of shear strength of the soil within a certain depth of the slope, resulting in the landslides. In order to mitigate the landslide, the deformation characteristics, reasons, development trends, etc. should be fully evaluated, and the appropriate geotechnical characteristics indices should be analyzed and selected. In addition, the combination of retaining structure, load reduction, back pressure, intercepting and drainage measures should be adopted based on different working conditions.

Key words: Landslide, Stability Analysis, Infiltration of Rainwater, Integrated Mitigation Measures