金沙江上游某水电站左岸拱肩槽边坡稳定性分析

以金沙江上游某水电站左岸拱肩槽边坡为研究对象,详细研究边坡岩体的结构特征,利用传递系数法分析边坡开挖后稳定性,并用Geostudio软件的SIGMA模块对开挖后边坡的应力-应变情况进行研究。结果表明:由结构面切割的2号块体易失稳,开挖后坡脚结构面发育附近出现拉应力集中,施工过程中,应加强支护与监测。

Analysis on Stability of Left Spandrel Groove Slope at a Hydropower Station by the Upper Reaches of Jinsha River

This paper,taking the left spandrel groove slope at a hydropower station by the upper reaches of Jinsha River as the object,studied the structural features of the slope rock mass in details,analyzed the stability thereof after the excavation of slope by transfer coefficient method,and then found out the conditions of stress and strain therein after excavation with the SIGMA module of Geosutdio software.The results show that the Block #2 cut by the structural plane is prone to failure and,after the excavation,tensile stress concentration may arise in the place near the slope toe where structural planes develop,thus supporting and monitoring are required in the construction.