Expressway Tunnel Operation Risk Assessment Model Based on Improved Critic Method and Cloud Model

The safety risk assessment of expressway tunnel operations, which is a multi-factor complex system evaluation problem, can be considered as a critical process of expressway operation management. From the perspective of the operating company, the risk evaluation index system of expressway tunnel operations can be established through actual operation conditions, and the objective weight of the evaluation index can be calculated through the CRITIC weighting method, after that, the digital characteristics of the risk index could be obtained through the cloud model. The comprehensive certainty value that belongs to each risk level could be gained, and the result should be determined according to the principle of maximum value. Finally this model could be applied to the overall risk assessment of the tunnel, and it is shown that the risk assessment result of expressway tunnel obtained by this model is similar to the actual operation conditions of expressway tunnels.