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黄登水电站坝址上游约1公里处分布有高陡倾倒松弛岩体边坡,该边坡具有较为独特的复杂变形特征,可能会影响大坝等1级水工建筑物的安全。本文基于极限平衡理论,采用SLIDE边坡计算软件,对该倾倒松弛岩体边坡稳定进行分析和研究。经计算,采用极限平衡理论分析的成果基本满足规范要求,且计算出的整体安全系数较高,只是边坡表面局部松散覆盖层安全系数较低,但不影响边坡的整体稳定。本文采用极限平衡理论分析倾倒松弛岩体类型的高陡边坡,经与其他方法比较,计算成果也具有一定参考性。
About 1 km upstream of the dam site of Huangting Hydropower Station, there is a high-steep-dumping slack rock slope with unique complex deformation features that may affect the safety of Grade-1 hydraulic structures such as dams. Based on the theory of limit equilibrium, SLIDE slope calculation software is used to analyze and study the slope stability of the dumping loose rock mass. The results of calculation using limit equilibrium theory basically meet the requirements of the code, and the calculated overall safety factor is high, but the safety coefficient of local loose cover on the slope surface is relatively low, but it does not affect the overall stability of the slope. In this paper, the limit equilibrium theory is used to analyze the high-steep slopes of the type of dumping loose rock mass. Compared with other methods, the calculated results also have certain reference.