Study on the Risk Assessment of Tunnel Collapse—Application of Fuzzy Analytic Hierarchy Process(AHP)Optimization Model by Introducing Borda Sequence Value Method
[Purposes]With the implementation and advancement of the Belt and Road Initiative,all kinds of tunnels are continuously constructed,and some engineering accidents also come one after an-other,especially the collapse of karst tunnels.In order to ensure the safety of tunneling.The risk assess-ment of collapse of karst tunnels has become a top priority.[Methods]Aiming at the shortcomings of fuzzy AHP which is insufficient for quantitative analysis,this paper introduces the Borda sequence value method in calculating the weight values,selects five indicators,including the level of surrounding rock,excavation span,depth of burial,groundwater,construction technology and management level,and estab-lishes a karst tunnel collapse risk assessment model with the optimized fuzzy Borda sequence value method.[Findings]The optimized fuzzy AHP was used to assess the risk of collapse of the tunnel,and the final risk level was judged to be Class Ⅲ.[Conclusions]By introducing the Borda sequence value method,the subjectivity of the fuzzy AHP can be effectively reduced,and the risk level of tunnel collapse in karst area assessed by using the model is basically consistent with the actual situation of the case,which indicates that the model has good practicability.
karst tunnelrisk assessmentfuzzy AHPBorda sequence value method
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