拉西瓦水电站坝基边坡稳定分析及加固措施

Stability Analysis and Reinforcement Measures for Dam Foundation Slope in Laxiwa Hydropower Station

拉西瓦水电站两岸坝基边坡最大开挖坡高达220 m,其稳定问题是本工程安全的重要问题之一。采用赤平投影法对两岸坝基边坡可能存在的楔形体滑动进行稳定分析,采用刚体极限平衡法对可能滑动的楔形体进行数值计算。在此基础上,对两岸坝基边坡采用锚索、锚筋桩、锚杆及挂网喷锚等加固措施,从而达到了稳定边坡的目的。

The manual high slope of the dam foundation in Laxiwa Hydropower Station is nearly 220 meters high, so its stability problem is one of the important problems for project safety. The stereographic projection is used to analyze the stability of wedgeshaped blocks, which is possible slipping, then the rigid limit equilibrium method is used to compute its safety factor. Based on the analysis and computation, several reinforcement measures are used, such as the prestressed tendons, anchor piles, anchor bars, anchor and shotcrete supporting with wire mesh, and so on, so as to stabilize the high slope.