Unsaturated seepage and stability of double-layer slope under rainfall infiltration

Taking a homogeneous double-layer soil slope as an example, the SEEP/W module and SLOPE/W in finite element analysis software GeoStudio were used this paper. Then, changes of pore water pressure stability under different rainfall patterns parameters studied. Finally, variation curves safety factor with time obtained. The results show that: Soil m are directly proportional to factor, while n is inversely factor. Under condition continuous rainfall, decreasing rate intensity.Under patterns, advanced normal will cause decline then gradually recover, delayed averaged continuously.In addition, there lag period change whole lasts about 6 hours. During period, inside began decrease, continued decrease. starts recover after ends.