Abstract
Aiming at the problem of risk evaluation of subway shield construction, a fuzzy comprehensive evaluation method based on WSR and combined weighting is proposed. Firstly, using the WSR methodology to analyze and select the risk indicators of the subway shield system from the three dimensions of “Wuli - Shili - Renli”, a risk assessment index system for subway shield construction was constructed. Then, fuzzy theory is introduced to establish a comprehensive evaluation model of subway shield construction based on combined weighting. Through the multiplication synthesis method, the weight values of the analytic hierarchy process and the entropy weight method are combined, and the principle of fuzzy relation synthesis is used to comprehensively evaluate the membership level. In the end, the shield tunnel in Qingdao Metro Line X is used as an example to calculate and demonstrate. The results show that the risk is at the “general” level, which is basically consistent with the actual situation. It shows the feasibility and applicability of the established evaluation method, which has guiding significance for reducing the risk of subway shield construction.
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