Due to the diversity of the wet-sprayed fiber reinforced concrete lining structure physico-mechanical parameters and the difficulty of the explicit expression of limit state failure function for concrete strength

the reliability analysis for the wet-sprayed concrete lining structure is difficult to perform. The response surface method is proposed to calculate the reliability of the wet-sprayed concrete lining structure. The calculation process is given.In the determination calculation of the rockmass and tunnel lining structure

the nonlinear finite element method is used while the second order response method is used in the reliability analysis. As a case study

the wet-sprayed fiber reinforced concrete tunnel lining structure for Ganzhou-Longyan Jinhuashan Railway tunnel in soft and weak rockmass

the reliability analysis for the tunnel lining structure is performed using the method proposed. The numerical analysis result shows that the reliability index for the wet-sprayed concrete tunnel lining structure is higher and the tunnel lining structure is in safe state.