| Under the background of global climate change,extreme rainfall weather becomes the most common and disaster-prone natural disaster.Its increasing frequency has brought huge threats to urban development and the safety of resident’s lives and properties on a global scale.Urban rail transit is gradually becoming one of the significant urban transportation infrastructures in major cities in China due to its large capacity,energy saving,environmental protection,and safety and punctuality.However,because of its special geographical location,urban rail transit is more susceptible to waterlogging caused by extreme rainfall.In recent years,several of urban rail transit systems in China have ceased operation due to waterlogging.Therefore,it is important and necessary to study the resilience of urban rail transit under waterlogging caused by extreme rainfall,so as to improve the stability and safety of urban rail transit,even to realize the sustainable development of urban rail transit.Combined with system disaster theory,resilience theory,and sustainable development theory,literature analysis method,SPRC model,dualistic factor contrast method,entropy weight method and cloud model are used to study resilience assessment of underground stations of urban rail transit under waterlogging caused by extreme rainfall.Firstly,the mechanism of resilience of underground stations of urban rail transit under waterlogging caused by extreme rainfall are analyzed in order to proposes 20 resilience influencing factors of underground stations of urban rail transit from dimensions of resistance,restoration and adaptation.Secondly,based on the idea of comprehensive evaluation,the resilience evaluation model of underground stations of urban rail transit under waterlogging caused by extreme rainfall is constructed.Finally,taking 13 underground stations of urban rail transit in Chongqing as the research objects,through the collection and sorting of data,the resilience level of 13 stations of urban rail transit under waterlogging caused by extreme rainfall are calculated as an empirical analysis.The results shows that Nanping Station,Guanyinqiao Station,Lianglukou Station,Shiyoulu Station,Chongqing North Station North Square,Ranjiaba Station,Xiejiawan Station belong to the comprehensive resilience level Ⅳ,and Hongqihegou Station,Jiaochangkou Station,Chongqing North Station South Square,Shapingba Station,Chongqing West Station and Beibei Station belong to the comprehensive resilience level III.On the basis of the evaluation results,an analysis of the reasons for the resilience level from dimensions of resistance,restoration and adaptation is conducted,and corresponding decision-making suggestions are proposed for improving the resilience level of urban rail transit to realize the sustainable development. |
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