Stability analysis methods for the bedrock shallow slope considering rainfall types

The rainfall is a main factor causing shallow slope landslides. Most of the methods for analyzing the bedrock shallow slope stability are based on the assumption of constant rainfall, ignoring the influence of rainfall intensity changes on the slope stability. The theory for analyzing the stability of bedrock shallow slopes under rainfall action is still not perfect. In this paper, the conventional types of rainfall intensity-time type are established. Types of uniform rainfall, incremental rainfall, decreasing rainfall and peak rainfall are unified by controlling the parameters. Based on the seepage theory and the infinite slope models, a method for analyzing the stability of bedrock shallow slopes considering the rainfall characteristics is proposed in this paper. A MATLAB program is used to calculate the slope stability. The results show that the rainfall types have a great influence on the stability of bedrock shallow slopes and the influence is time-dependent. The influence of rainfall characteristics on the slope stability should be considered in the practical engineering.