Rainfall's Effect on the Stability of Unsaturated Slopes
Kong Yufei,Song Erxiang,Yang Jun,Zhang Longying,Shi Honggang and Liu Jian
DOI:10.11835/j.issn.1674-4764.2013.06.003
Received ,Revised , Accepted , Available online July 01, 2015
Volume ,2013,Pages 16-21
- Abstract
Aimed to analyze the influence of rainfall on slope stability. The finite element method (FEM) is used for the calculation of 2-D transient seepage in the unsaturated slope, while the method of limit equilibrium is used for computing its safety factor. The change of pore water pressure, slip surface and safety factor are investigated through numerical calculations with consideration of various intensity and duration of rainfall. Special attention has been paid to slope stability after rainfall. It is found that sometimes the minimum safety factor may occur several hours or several days after the rainfall, instead of the time during the rainfall or when the rain just stops.