二次衬砌支护参数对围岩稳定性影响分析

Analysis on influence of secondary lining supporting parameters on surrounding rock stability

在水工隧洞施工中,不仅要重视工程的安全性,还应该兼顾工程的经济性。文章以辽宁省大风口水库新建输水隧洞为例,构建FLAC3D三维有限元模型,利用数值模拟的方法,对二次衬砌混凝土参数进行优化研究。根据研究成果,建议二次衬砌选用厚40 cm的C25混凝土。

In the construction of hydraulic tunnel,we should not only pay attention to the safety of the project,but also give consideration to the economy of the project.In this paper,the FLAC3D three-dimensional finite element model is established by taking the newly-built water conveyance tunnel of Dafengkou Reservoir in Liaoning Province as an example.The parameters of secondary lining concrete are optimized by numerical simulation method.According to the research results,it is suggested that C25 concrete with a thickness of 40 cm should be used for the secondary lining.