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在各种边坡变形破坏的诸多影响因素中,地下水活动往往是许多滑坡发生的重要原因。水对滑坡稳定性的影响可归纳为两方面:一方面它消弱岩(土)体抗滑力,改变滑坡的力学性能,降低滑坡的强度,尤其是软弱结构面的抗剪强度;另一方面它改变坡体的应力状态,增加水压力(包括动、静两部分)。地下水对滑坡稳定性的作用力主要是指静水压力(浮力)和动水压力(渗透力)。
Among various influencing factors of deformation and failure of various slopes, groundwater activities are often the important reasons for many landslides. The influence of water on landslide stability can be summed up in two aspects: on the one hand, it weakens the anti-slip force of rock and soil, changes the mechanical property of landslide, and reduces the strength of landslide, especially the shear strength of weak structural plane; It changes the state of slope stress, increasing water pressure (including the dynamic and static parts). The effect of groundwater on landslide stability mainly refers to hydrostatic pressure (buoyancy) and hydrodynamic pressure (penetration).