竖向裂隙对降雨条件下边坡稳定性的影响

The Influence of Vertical Fissures on Land Slope Stability After Rainfall

对降雨条件下边坡稳定性进行分析时,通常未考虑坡体竖向裂隙的影响。实际工程中,边坡由于前期变形可能会在坡体不同的位置形成竖向裂隙。为研究降雨条件下竖向裂隙对边坡稳定性的影响,利用Geo-Studio软件对降雨工况坡体有无裂隙以及裂隙处于坡体不同位置时边坡稳定性随时间的动态变化进行了模拟和比较。结果表明,降雨条件下竖向裂隙的存在会使边坡的稳定性更大幅度地降低;竖向裂隙的位置对边坡的稳定性影响显著,裂隙底部越接近地下水位,越容易降低边坡的稳定性。

The analysis of the slope stability under rainfall condition usually fails to take vertical fissures into consideration.However, in practical engineering, vertical fissures may be formed due to early deformation at different positions in the slope. To ex-amine the influence of vertical fissures on the slope stability after rainfall, the software of Geo-Studio is applied to simulate condi-tions with the absence or presence of fissures and with fissures at different positions in slope, and the dynamic changes of the slopestability over time after rainfall under each condition, and to compare changes of related parameters. The results show that the verti-cal fissures after rainfall greatly reduces the slope stability and their positions have significant effects on the slope stability： the clos-er the bottom of the fissures is to the underground water level, the easier it is to lower the slope stability.