Study on the structural safety evaluation method of the municipal tunnel

A method of fuzzy clustering analysis was proposed to evaluate the structural safety. Based on the study of the municipal tunnel behavior, this paper used the numerical simulation method to analyze the present condition of the tunnel, so as to obtain the present behavior and the influence law of the municipal tunnel. Four key factors were considered during the course of analysis, such as the reinforcement corrosion, the concrete crack, the tunnel water leakage and the soil liquid-plastic state. Then, used the fuzzy clustering analysis method to evaluate the safety of the tunnel. Moreover, take a typical electric power tunnel as an example, used the fuzzy clustering analysis to synthetically evaluate the safety grade, the results showed that the four factors above had different impact to the safety of the tunnel, through the results, we established a tunnel evaluation theory system to evaluate the structural reliability. The theory and method had important practical value to the tunnel engineering.