Research on Risk Assessment of Complex Mountain Tunnels Based on AHP-FCE

Complex geological environment and difficulties in operation and maintenance of mountain tunnels result in a lot of damage during the operation period of mountain tunnels. Therefore, the risk assessment and reinforcement technologies for complex mountain tunnels during the operation period need to be developed and improved. As a result, in this paper, the research on safety influence factors and their weights during the operation period of complex mountain tunnels was conducted based on Fuzzy Comprehensive Evaluation (FCE) and Analytic Hierarchy Process (AHP), the fuzzy set of weights for risk influencing factors during the operation period of complex mountain tunnels was established, the membership functions of factors at the index level were determined, the comprehensive evaluation matrix of tunnel risks was obtained, and the fuzzy comprehensive evaluation method for risks of complex mountain tunnels was proposed. This method has been verified in the Jinjishan Tunnel, and its analysis results are credible. In addition, corresponding risk prevention and control measures were put forward based on the evaluation results, and they provided guidance and reference for similar projects.