Safety Resilience Assessment of Mountain Tunnel Construction based on Grey Correlation Degree

Based on the concept and characteristics of tunnel resilience, combined with the situation of mountain tunnels, the concept of safety resilience of mountain tunnel construction is proposed.Consider the four indicators of resilience: robustness, resourcefulness, rapidity, redundancy, characteristics of mountain tunnels, engineering geology, and emergency management, seven tunnel construction resilience indicators were determined, including average water infiltration, tunnel burial depth and lining strength.In view of the shortcomings of the traditional analytic hierarchy method, the G1 method is introduced to obtain the subjective weight of each index, which makes full use of the experience of experts.However, in order to cope with the drawbacks of subjective judgment, the gray correlation analysis method is introduced to obtain the objective weight.The combined weights are obtained in a ratio of 3:2.Combined with redundancy, the five levels of tunnel resilience are obtained.Based on this, the construction safety resilience evaluation model of mountain tunnels was constructed, and the resilience level was determined.Taking the Benxi-Ji' an Expressway as an engineering example, according to calculating the tunnel resilience, construction safety resilience grade is grade IV, which is low.Combined with the specific engineering situation, it can be seen that the measures to prevent drainage should be strengthened during the tunnel construction process.