Abstract: In order to study the effect of the rainfall intensity on the 2# Landslide body of Sichuan-Tibet Highway Route 102 landslide groups on plastic strain and displacement, this paper presents a simplified numerical landslide model established by using ABAQUAS finite element software. In the numerical analysis, the seepage-stress coupling method was used to simulate the plastic strain and displacement in landslide body different rainfall intensity but the same duration conditions. Numerical analysis results show that, under the same rainfall duration, with the increase in rainfall intensity, the plastic strain and displacement increase. Under the rainfall intensity of 12mm/day, 24mm/day, 36mm/day, respectively, the plastic strain and displacement in the landslide body are small. When the slope is under a steady state with the rain intensity of 48mm/day, and the plastic strain is rapidly increased after 6 days. A continuous plastic strain zone was formed in the potential landslide body and the slope instability was occurred.

Key words: Seepage-Stress Coupling, Plastic Strain, Displacement and Deformation, Landslide Instability