盖下坝水电站拱坝人工垫座优化设计

摘要

As the narrow Ⅴ-type valley in the dam site of Gaixiaba Hydropower Station, the artificial socket was designed for the construction of arch dam.In the construction design, the structure, dimension and excavation of socket were adjusted based on the actual rock conditions exposed by excavation.The socket stability and stress are analyzed by finite element method and rigid block limit equilibrium method, and the results show that the stability and stress of adjusted socket meet the requirements of specifications and the socket has no adverse impact on dam stress.%盖下坝水电站坝址河谷为狭窄的"V"形河谷,为此在拱坝坝基河谷设置了人工垫座.技施设计阶段根据实际开挖揭露的岩面线和岩石情况,对垫座结构尺寸及开挖形式作了适当调整.采用有限元法和刚体极限平衡法对垫座稳定及应力进行分析,结构调整后垫座的稳定和应力满足规范要求,对坝体应力没有不利影响.