隧道时效大变形灾害的数值模拟与处治技术研究

The numerical simulation and treatment technology research on tunnel time-dependent large deformation disaster

随着我国社会经济的快速发展,高速铁路、公路和水利水电等工程的大规模建设,隧道软岩流变带来的大变形灾害越来越多。依托福建永宁高速石林隧道软岩大变形灾害相关问题,采用流变本构对大变形段进行了数值模拟分析,确定了二次衬砌最佳支护时段,并结合工程实际提出了大变形段围岩变形的控制技术。

With the rapid development of social economy in China,and the large-scale constructions of highspeed railway,highway,water conservancy,and hydropower projects,the disasters are becoming more and more caused by tunnel soft rock rheology.Based on the related issues of tunnel soft rock large deformation disasters in Shilin tunnel of Fujian Yongning high-speed,the numerical simulation analysis to large deformation sections have been made in this paper by using rheological constitutive model.The optimal supporting time of secondary lining has been determined.It also proposes the control technology of rock deformation in large deformation sections combining with practical engineering constructions.