隧道衬砌结构病害风险优度评价

Risk priority degree assessment of structural diseases on tunnel lining

为预防衬砌结构病害导致的事故,对衬砌结构进行周期性风险评价.在确立隧道病害风险等级基础上,构建包括7种特征指标的衬砌病害风险优度评价指标体系;基于可拓原理建立特征指标与风险等级的关联度函数;采用改进的熵权法计算评价指标权重,从而实现对隧道衬砌病害风险的优度评价;根据优度评价法对实际工程隧道衬砌结构进行风险评价.研究结果表明:隧道工程监测实际与优度评价结果具有较高一致性.研究结论初步突破了对传统的隧道衬砌结构病害风险评价认识,有助于更加准确辨识隧道衬砌结构病害风险,制定有效控制措施.

In order to prevent the accidents caused by lining structure diseases,periodic risk assessment of lining structure is carried out.On the basis of establishing the risk level of tunnel lining structure diseases,the risk priority degree assessment index system of lining diseases including seven characteristic indexes is constructed.The correlation function between characteristic index and risk grade is established based on matter element extension principle.The weights of evaluation index is calculated with improved entropy method,so the risk priority degree assessment of tunnel lining diseases is realized.The results show that the monitoring practice of tunnel engineering is in good agreement with the priority degree assessment results.The research conclusion initially breaks through the understanding of the traditional risk assessment of tunnel lining structure diseases,and it is helpful to more accurately identify the disease risk of tunnel lining structure and formulate effective control measures.