锦屏一级水电站右岸导流洞衬砌破坏特征三维数值模拟

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。

Three-dimensional Numerical Simulation of Damage Characteristics of Lining of Right Bank Diversion Tunnel in Jinping I-level Hydropower Station

Aiming at the cracking and damage phenomena in lining of right bank diversion tunnel in Jinping I-level hydropower station, three-dimensional geological generalization model was established based on the geological data of underground powerhouse and diversion tunnel. The cracking and damage mechanism in lining of right bank diversion tunnel were deeply analyzed through three-dimensional numerical simulation. Then the damage evolution law of the lining was studied. The results show that the relatively large cracking and damage phenomena in lining of right bank diversion tunnel are caused essentially by the geological conditions. The other main reasons include the complex loading process, the influence of main powerhouse continued excavation unloading, and continuous disturbances caused by large-scale continuous adjustment in stress field of rock pillar between the vice powerhouse end wall and diversion tunnel. The research provides technological support for reinforcement of right bank diversion tunnel.