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当特高拱坝地下厂房受地形、地质条件限制,需建在坝肩较近位置时,厂房的开挖施工和长期运行常会影响坝肩安全稳定。首先以乌东德大坝为例,分析大坝与厂房布置的特点,然后从力学的角度分析大坝和地下厂房的力学和安全稳定的相互作用机制;并采用Drucker-Prager屈服准则,对大坝与厂房开展精细非线性三维有限元分析,重点研究大坝和厂房在正常荷载和超载荷载下的变形、应力、拱推力、坝肩基础、整体安全度分布以及相互作用机制,得到大坝与厂房相互影响稳定的工作状态条件。研究成果可供类似工程设计分析提供参考。
When the underground powerhouse of UHV arch dam is limited by the topography and geological conditions and needs to be built closer to the dam abutment, excavation and long-term operation of the power plant often affect the safety and stability of the dam abutment. Firstly, taking the Wudongde Dam as an example, this paper analyzes the characteristics of the layout of the dam and the factory building, and then analyzes the mechanics and safety and stability interaction mechanism between the dam and the underground plant from the perspective of mechanics. By using the Drucker-Prager yield criterion, Dam and plant to carry out three-dimensional nonlinear finite element analysis, focusing on the dam and plant under normal load and overload load deformation, stress, arch thrust, dam foundation, the overall safety of the distribution and interaction mechanisms to be dam and Plant mutual influence and stability of the working conditions. The research results can provide reference for similar engineering design and analysis.