The stability of shallow soil slope under rainfall conditions is complex and uncertain,making it difficult to eval-uate objectively and accurately based on a single factor.In order to explore the variation law of stability of a shallow soil slope in Huangping County under different rainfall intensity and duration conditions,a combination of geotechnical testing and numerical simulation was used to dynamically couple the rainfall effect on slope stability by writing FISH language.The permeability coefficients of miscellaneous fill and clay layers were obtained through geotechnical testing.The FLAC3D numerical simulation adopting the fluid-solid coupling theory can comprehensively consider the true influence of rainfall conditions and soil characteristics on slope stability.The results show that the decrease of soil strength due to water seep-age,the miscellaneous fill-clay interface is the potential unstable weak structure,the maximum pore water pressure con-centration area gradually shifts to the slope interior with increasing rainfall intensity.Slope cracking can quickly direct surface runoff formed by heavy rain(100mm/d)into the miscellaneous fill-clay interface to accelerate its activation,and the slope enters an unstable state more quickly(Fs=1.15).
维普
万方数据
