中文摘要：

地震作用下岩质高边坡的稳定性历来是边坡稳定性研究中的重点,难度比较大.总结了对地震边坡进行工程地质分析的方法,并结合西藏某拟建水电站所在区工程地质条件,对地震作用下该水电站的边坡的稳定性进行工程地质分析;建立数值模型,采用有限差分程序FLAC 3D 对地震作用下该边坡的动力稳定性进行分析.由工程地质分析可知,该边坡在地震作用下整体处于稳定状态;拟静力法计算可知,地震对该边坡的稳定性有一定影响;通过地震动力时程分析可知,地震对边坡顶部和坡面附近的影响较大,因而这些地方危险较大;同时还分析了地震波频率、振幅对稳定性的影响以及断层对地震波传播的影响规律.

英文摘要：

The stability of rock slope under the effect of earthquake plays a significant role in slope stability study,which is difficult to analyze. The paper, based on the engineering geological conditions in the area where the hydropowerstation is to be located, analyzed the dynamic stability of the slope in combination with engineering geologyanalysis. Then a numerical model was built based on real condition, and the analysis of the stability of theslope under earthquake action was conducted with finite difference program FLAC 3D. Through comparison, theresults of numerical simulation verified the correctness of the conclusions of engineering geology analysis, andprovided evidence for the design and construction of the hydropower station, also provided ideas for the similarslope seismic stability evaluation.