水对滑坡作用机理分析

水是影响斜坡稳定性的主要因素之一，大多数滑坡都是以降雨下渗引起地下水状态变化为直接诱发因素。地表水对滑坡表面冲刷、侵蚀、渗透；地下水对滑坡岩土体有润滑、潜蚀、软化和淋滤作用，由于地下水含量、水头和动静水压力的变化，使得渗流场发生改变，导致地应力场和滑坡岩土体自身力学性质发生变化。在地表水和地下水的双重作用下，导致滑坡产生，本文分析了水-地应力-岩土体的耦合模式及其对滑坡的作用。

Analysis on Action Mechanism of Water to Landslide

Water is one of main factors, which affect the stability of slopes. Most landslides are induced by the change of underground water which is caused by the seepage of rainfall. The surface of slope is scoured, eroded and permeated by surface water. Meanwhile, rock soil mass is moistened, eroded, softened and leached by underground water. Besides, the variation of underground water content, head pressure, dynamic and hydrostatic pressure influences the seepage field, which leads to the change of ground stress field and the mechanics property of rock soil mass. Surface water and underground water have a double effect on the occurance of landslide. Water-ground stress-rock soil mass coupling mode and its effect on landslides are also analyzed.