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针对影响拱坝坝肩稳定性因素诸多问题,以乌东德高拱坝为例,采用非线性有限元数值分析法与矢量和安全系数法,分析了影响拱坝坝肩稳定的因素。计算结果表明,不同工况和影响因素下,坝肩岩体具有较高的矢量和安全系数;相对于比较方案,可研方案建基面的选择更合理;当裂隙连通率达到30%以上时,坝肩岩体不满足稳定性要求,需进行加固处理;拱端与上、下游基岩采用摩擦连接对拱端的受力更有利。
Aiming at many problems that affect the stability of arch dam abutments, taking Wudongde arch dam as an example, the factors influencing the stability of arch dam abutment are analyzed by nonlinear finite element method and vector and safety factor method. The calculation results show that under different conditions and influencing factors, the abutment rock mass has a higher vector and safety factor. Compared with the comparison scheme, the choice of feasibility study foundation is more reasonable. When the fracture connection rate reaches more than 30% , The abutment rock mass does not satisfy the stability requirements and needs to be reinforced; the friction between the arch end and the upstream and downstream bedrock is more favorable to the arch end.