水位降落期间土质岸坡稳定性劣化机理及趋势  

Mechanism and Trend of Stability Deterioration of Soil Bank Slope during the Course of Water Level Declining

作　　者：刘厚成[1] 唐红梅[1] 谷秀芝[1] 

机构地区：[1]重庆交通大学岩土工程研究所,重庆400074

出　　处：《重庆交通大学学报（自然科学版）》2009年第3期565-568,共4页Journal of Chongqing Jiaotong University(Natural Science)

基　　金：国家自然科学基金项目(50678182);重庆市重点自然科学基金(2008BA0015)

摘　　要：以三峡库区典型的土质岸坡为研究对象,通过GeoStudio软件对库区岸坡进行数值模拟,计算水库蓄水期间,水位由175 m降落到145 m的工况下,岸坡的饱和-非饱和渗流场的变化趋势,研究土质岸坡稳定性劣化机理。计算结果表明:库水位降落期间,随着渗透系数的减小,土质岸坡稳定系数下降得越快,且岸坡稳定系数曲线有相似的下降趋势。Typical soil bank slopes of Three Gorges Reservoir area are taken as research object. Geostduio software is adopted to carry out the numerical simulation of soil bank slope. The trend of transformation of the saturation-instauration infiltration field is calculated on the condition that the reservoir water level is declining from 175m to 145m during the reservoir operation; moreover, the mechanism of stability deterioration of soil bank slope is studied. The calculation results demonstrate that during the course of water level of reservoir declining, as the permeability coefficients of soil bank slope declines, the stability coefficients of slope decline faster; and the stability coefficients has similar downward trend.

关 键 词：岩土力学 土质岸坡 稳定性劣化 变化趋势 渗透系数 

分 类 号：P642[天文地球—工程地质学]