白鹤滩水电站边坡稳定控制因素与破坏模式研究

通过总结影响白鹤滩水电站边坡稳定的控制性因素,分析了该边坡可能发生的破坏模式,进而对其稳定性进行了工程地质分析。结果表明,右岸边坡可分为4个区域,Ⅳ区和Ⅰ区拱坝下游边坡因断层切割和开挖可能顺层滑移,其他部位边坡稳定性主要受节理控制,以小规模楔形体、倾倒和坠落等破坏形式为主。研究成果可为工程施工提供参考。

Study on dominant factors and failure mode of slope stability of Baihetan Hydropower Station

The dominant factors those impact the slope stability of Baihetan Hydropower Station are studied, and the modes of the failures possibly occur therein are analysed, furthermore, a engineering geological analysis on the stability of the slope is made as well. The results show that the slope of the right bank can be divided into 4 regions and the bedding-slips could occur within the region IV and the downstream slope of the arch dam in the region I due to the cut from fault and excavation, while the stabilities of the other regions are mainly controled by the joints therein with the major failure modes of small wedge sliding, toppling deformation and rock falling, etc. The study results can provide some references for the construction of the similar project concerned.