新疆CHE水利枢纽渗流条件下岩质边坡稳定性分析

Analysis on Rock Slope Stability under the Condition of Seepage in CHE Water Control Project in Xinjiang Uygur Autonomous Region

基于GEO-STUDIO软件,运用统计岩体力学理论,对新疆CHE水利枢纽不同工况下的边坡稳定性进行分析。结果表明:研究区工程地质条件复杂,断层、挤压破碎带及岩脉广泛发育,左右岸均存在5组优势结构面;对左右岸参数敏感性分析,两岸强卸荷岩体的粘聚力c对应的稳定性系数的曲线斜率远大于摩擦角φ对应的稳定性系数的曲线斜率,因此在一定范围内,坡体稳定性对粘聚力c值的变化更为敏感;研究区边坡在自然条件、蓄水条件及库水快速降升条件稳定系数K>1,即边坡处于稳定状态。

Based on the GEO STUDIO software, appling the theory ol statistical mechanics ol rock mass, slope stability under different working conditions in CHE Water Control Project in Xinjiang Uygur Autonomous Region has been analyzed. As show by the results, engineering geological conditions are complicated in the study area. Faults, compressed fragmentized belts and rock veins developed widely. There are 5 groups preferred structural planes in both sides ol the slope. The sensitivity ol the parameters in both sides have been analyzed. The stability factor rate curve slope ol lull ol cohesive force is larger than the fr ic tio n angle, so the slope stability is more sensitive to the change ol cohesive lorce value. The stability factor is greater than 1 in natural condition, storage condition and quick rising and falling ol water level. That is to say, the slope is in steady state.