水对滑坡作用机理分析
首发时间:2009-04-23
摘要: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。
关键词: 水 地应力 诱发 水-地应力-岩土体耦合作用
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The Mechanism of Water on Landslides
Abstract:Water is one of the main natural factors, which affect stability of slopes. The change of underground water caused by pervasion of rainfall is the direct factor of the most landslides. Surface water has effects of washing, erosion and permeation on surface of landslides, at the same time, underground water affect on landslides through lubricating, suffusion, mollification, leaching process. Besides, the change of seepage field because of the movement of the content of underground water, head, dynamic pressure and hydrostatic pressure leads to the change of the earth stress field. Landslides occur because of the dual action of surface water and underground water, the model of coupled water-stress-rock process and its action on landslides are discussed.
Keywords: water earth stress trigger coupled water-stress-rock process
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