西静河水库位于地震频发区, 近坝库岸坡陡峻, 其左岸边坡是否稳定一直是困扰水库安全运行的主要问题之 一。根据西静河水库库区地质勘察资料和坝址区水文地质条件, 对西静河水库库岸滑坡带进行了详析, 在此基础上 采用不平衡推力法对左库岸失稳边坡进行了稳定性分析, 结果表明: 西静河水库左岸边坡趋于稳定, 但在持续暴雨 或加载地震力的情况下边坡中段有滑坡风险, 该结论得到了现场勘察情况的支持。

Xijinghe Reserv oir is lo cated in an active ear thquake zo ne, and the slopes near the dam are steep. Hence, the stability of the slopes has alw ays been o ne o f the pro blems affect ing the reserv oir secur ity. Based o n t he g eolog ical survey data and hydro2 g eolog ical conditio ns in the Xijinghe Reserv oir , the landslide zo ne in the embankment of the Xijinghe Reserv oir was analy zed in detail. T he stability analysis o f the slopes o n the left bank was perfo rmed using the imbalance thrust for ce method. T he results show ed that the slopes o n the left bank of the Xijing he Reserv oir is stable under the natural co nditions; how ever, landslides may occur in the middle par t o f the slopes under the sustained heavy r ains or ear thquakes co nditions. The co nclusio ns wer e consistent wit h the in2situ survey results.

国家自然科学基金( 51209145; 51179108; 51209144) ; 南京水利科学研究院院基金( Y713010)