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针对锦屏一级水电站右岸导流洞衬砌结构开裂、破坏现象,基于锦屏一级水电站右岸地下厂房和导流洞地质资料,建立了三维地质概化模型,利用三维数值模拟方法模拟了其破坏机制,分析了右岸导流洞衬砌结构破坏的成因。结果表明,右岸导流洞所赋存的地质环境是其开裂破坏的基本条件,复杂的受力条件和受主厂房持续开挖卸荷的影响以及副厂房端墙和导流洞之间岩柱应力场发生过大规模持续地叠加调整,引起持续重复地扰动是其开裂破坏的主要原因,为导流洞加固设计提供了技术支撑。
In view of the cracking and destruction of the lining structure of the diversion tunnel on the right bank of Jinping first stage hydropower station, based on the geological data of underground powerhouse and diversion tunnel on the right bank of Jinping first stage hydropower station, a three-dimensional geological generalization model was established and the damage was simulated by three-dimensional numerical simulation Mechanism, analyzed the cause of the failure of the right bank diversion tunnel lining structure. The results show that the geologic environment in the diversion tunnel on the right bank is the basic condition of cracking and failure, the complicated stress conditions and the continuous excavation and unloading of the main plant and the rock column between the end wall of the auxiliary plant and the diversion tunnel Large-scale continual superimposition and adjustment of stress field cause the continuous and repeated disturbance to be the main reason for cracking and cracking, which provides technical support for the reinforcement design of diversion tunnel.