水电站坝面光伏组件荷载对坝坡安全性影响分析

Influence of Photovoltaic Module Load on the Safety of Dam Slope in Hydropower Stations

对水电站面板堆石坝下游坝坡增设光伏设备进行受力分析。首先采用满足力与力矩平衡的刚体极限平衡垂直条分法即边坡稳定分析的Spencer法对土条受力情况展开分析,建立安全系数控制方程;然后以坝底和坝高分别作为横纵坐标轴选取尽可能少的未知变量,将问题转化为在满足约束条件下确定未知变量的优化模型来确定滑裂面,按照设计标准和安全指标对坝坡安全性进行分析表明,其下游坝坡抗滑稳定性能够满足要求。

Stress and stability analysis are carried out on the slope of the concrete face rockfill dam in a hydropower station considering the photovoltaic equipment installed on the downstream dam surface.Firstly,the rigid body limit equilibrium vertical slice method which satisfies both the balance of force and moment,i.e.the Spencer method for slope stability analysis,is adopted to analyze the stresses of the soil slices and establish a safety factor equation.Then,taking the dam bottom and the dam height as the horizontal and vertical axes,and selecting unknown variables as less as possible,the problem is transformed to an optimization model in which the unknown variables are determined considering constraint conditions to define the sliding surface.The safety of the dam slope is analyzed and evaluated according to the design standards and safety factors.The results show that the stability of the downstream dam slope against sliding can meet the requirement.