Research on Disaster Risk Assessment of Urban Underpass Tunnel Engineering Induced by Floods
In order to solve the problem of quantitative analysis of disaster risk of urban flood induced underpass tunnel engineering,the factors of disaster causing,disaster pregnant,disaster bearing and disaster reduction of tunnel engineering flood were analyzed,and the flood risk evaluation model of urban underpass tunnel engineering was constructed.The AHP-FCE model evaluation method is used to select an underpass tunnel project as an application example.The pairwise weight data of each level index are obtained by AHP method,and the evaluation scores of each level index are achieved by using the FCE method.The results show that:1)Tthe disaster prevention and mitigation ability index has the most significant impact on the flood disaster of tunnel engineering,and the vulnerability index of disaster bearing body has the greatest possibility to induce the flood disaster of tunnel engineering.The underpass tunnel has a"medium"risk level in the comprehensive evaluation,which has a great impact on the construction quality and progress,and basic preventive measures need to be taken.2)The paper puts forward the risk indicators that should be focused on and improved in the flood risk management of urban underpass tunnel,and realizes the quantitative rating of disaster risk of Underpass tunnel engineering under the flood scenario.
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