Study on mechanical rules of double-lining in creeping surrounding rock

In order to analyze the mechanical rules of double-lining in creeping surrounding rock tunnel,a finite element model is established based on the finite element program ANSYS. Using generalized Kelvin constitutive relation,the mechanical rules of double-lining are analyzed when secondary lining is applied at different support time or different stiffness. The analysis results indicate that the stress of secondary lining increases gradually,and then tends to be stable when it is applied at differen...