西南某水电站右坝肩开挖边坡稳定性三维有限元分析

3-D Finite Element Analysis of the Right Abutment Solpe Stability at a Hydropower Station

正在建设中的西南某水电站,在开挖过程中,右坝肩岩体的不同部位出现了不同程度的变形破坏迹象,局部出现了小规模的跨塌现象。为了评价开挖对边坡的影响,根据施工开挖的顺序,应用三维弹塑性有限元数值法对坝肩边坡开挖后的变形、应力状况及破坏区分布进行模拟,揭示边坡可能的失稳的部位,并对边坡的支护方案提出建议。

Some evidences of failure by rupture appeared on the right dam abutment slope of a southwestern hydropower station during the excavation, and collapses took place in some local zones. In order to evaluate the effect of excavation, according to the order of the excavation, the method of 3-D elastoplastic finite element analysis is used to simulate the deformation, the distribution of stress and failure area, so the possible failure location of the slope can be revealed, moreover table a proposal about the support blue-print.