基于集对分析法的山岭隧道坍塌风险评价

坍塌是山岭隧道施工中主要的地质灾害之一.为了有效评估隧道坍塌风险,为风险控制提供依据,提出了一种基于集对分析理论的山岭隧道坍塌风险评价方法.首先,综合考虑隧道坍塌孕险环境和致险因子,选取围岩级别、地下水、不良地质、初期支护刚度、开挖方法等主要影响因素作为评价指标.其次,将评价指标与风险等级标准相结合建立集对,并将坍塌风...

Collapse Risk Assessment of Mountain Tunnels Based on Set Pair Analysis Theory

Collapse is a major geological disaster that frequently occurs during mountain tunnel construction.In order to evaluate the collapse risk and provide a basis for risk control,a risk assessment method for mountain tunnel collapse based on set pair analysis(SPA)theory is proposed.First,the risk environment and risk factors of tunnel collapse were considered,and the main influencing factors,such as surrounding rock grade,groundwater,unfavorable geology,initial support stiffness and excavation method,were selected as evaluation indices.Second,a set pair was established with the combination of the evaluation indices and the standards of risk grade.Then,the evaluation indices of collapse were divided into two main types:benefit type and cost type indices.Based on SPA,the graded connection degrees of evaluation indices were calculated.Finally,a collapse risk evaluation model based on SPA is established and applied to No.2 tunnel in Binfang on the line of the Jinghai Expressway in China.The evaluation result was in good agreement with the actual situation.The results showed that set pair analysis method is simple,feasible and easy to implement,which is an effective method for collapse risk assessment and has good prospects for further engineering applications.