【作者】 李宁； 何敏； 张鹏； 于冲；

【Author】 Li Ning He min Zhang peng Yu chong (Institute of geotechnical engineering, Xi’an University of Technology, Xi’an 710048 China; State Key Lab. of Frozen Soil Eng., Cold and Arid Region Environmental and Engineering Research Institute, CAS, LAN Zhou 730000, China)

【机构】 西安理工大学岩土工程研究所；

【摘要】 锦屏一级水电站各水工建筑物岩体在开挖过程中将形成一系列高边坡,自然边坡达到1000 m,开挖边坡的高度达到了300～500m,边坡问题十分突出。针对左岸边坡由于深部裂缝,断层f42-9,f5(f8),煌斑岩脉组成巨大变形拉裂体岩体导致边坡稳定性问题,进行了精细三维非线性有限元分析,首先分析了边坡分层开挖过程中的应力场与变形场,并分别采用传统的安全系数与有限元强度折减法对边坡的稳定性进行了评价,指出了两种分析方法计算所得安全系数量级上的差异,主要是两者反映边坡破坏的机理不同。更多还原

【Abstract】 There are some unfavorable geologic conditions such as fault f5, f8 and deep-buried release cracks S144-1, which definitely affect the slope stability in Jingping Hydropower Project. To evaluate the stability of the slope, 3-D finite element analysis is implemented. The safety factor is given based on traditional safety method and strength reduction method, and also the mechanism of the difference between them is pointed out.更多还原