高温暴雨双因子扰动下强风化泥岩边坡稳定性演化分析OA

To address the severe threats posed by extreme rainstorms and rising temperatures to the stability of highway cut slopes,this study establishes a dynamic evaluation model based on temperature and moisture content by integrating laboratory direct shear tests,variable-temperature permeability tests,and matric suction tests with the Green-Ampt(GA)and Van Genuchten(VG)models.The model simulates the dynamic evolution of wetting front depth and slope safety margins under dual-factor disturbances.The results indicate that soil cohesion follows a parabolic relationship with moisture content,peaking between 15%and 17%.As temperature increases,the permeability coefficient rises while the soil-water characteristic curve(SWCC)shifts downward and to the right,reflecting a significant reduction in soil water-holding capacity.Furthermore,the synergistic effect of high temperature and high moisture content markedly accelerates the advancement rate of the wetting front,leading to a substantial decrease in the slope's safety margin.These conclusions provide critical theoretical support for the early warning and disaster prevention of slopes in extreme climate regions.