Abstract: 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.

Key words: rock mechanics , soil bank slope , stability deterioration , change trend , permeability coefficients

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175m降落到145m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。

关键词: 岩土力学, 土质岸坡, 稳定性劣化, 变化趋势, 渗透系数