某引水隧洞为大型供水工程中的重要工程,全面系统地验证其衬砌结构的安全稳定性对工程意义重大。首先采用荷载-结构法对典型断面衬砌结构的配筋情况进行复核,其次采用地层-结构法,借助三维数值软件FLAC~(3D)对典型断面衬砌结构进行仿真模拟分析,并评估衬砌结构的混凝土强度是否满足要求。结果表明,引水隧洞衬砌结构应力满足混凝土强度要求,承载能力满足安全要求,为引水隧洞加固设计提供了参考。 A diversion tunnel is an important project in a large-scale water supply project. It is of great significance to verify the safety and stability of the lining structure comprehensively and systematically. Firstly, the load-structure method is used to check the reinforcement of the typical section lining structure. Secondly, by using the stratum-structure method, the three-dimensional numerical software FLAC 3D is used to simulate and analyze the typical section lining structure, Whether the strength to meet the requirements. The results show that the stress of the lining structure of diversion tunnel meets the requirements of concrete strength and the bearing capacity meets the safety requirements, which provides a reference for the reinforcement design of the diversion tunnel.