Stability of Granite Residual Soil Slopes Under Different Rainfall Conditions
YU Wei
GAO Pinhong
ZHENG Xingmin
Abstract：Rainfall-induced slope landslide is the most common geological disaster in the world.In order to reduce the occurrence of related disasters,taking a slope in Canglan County as a case study,and a three-dimensional slope calculation model coupling stress-seepage-deformity was established using Flac 3D software.The changes in slope soil saturation,horizontal displacement of slopes,and plastic zone,as well as the time-varying law of slope safety factor under different rainfall intensities and duration,were analyzed.The results show that with the increase in rainfall duration,the saturation of the slope surface develops from the middle to the bottom,gradually reaching saturation;under heavy rainfall conditions,the maximum horizontal displacement of the middle and lower parts of the slope reaches 2.51 cm;under long-term rainfall conditions,the failure mode of the slope gradually changes from tensile failure to shear failure;under heavy rainfall conditions,the slope safety factor decreases the fastest,reaching 1.189 after 24 hours,which is lower than the standard value,resulting in slope instability.The research results provide references for the research on the stability of granite residual soil slopes under similar rainfall conditions.
Keywords：SlopeStabilityRainfall intensityRainfall durationSafety factor
Publication Date：2024-09-30
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：10( 109-118 )