Vulnerability Assessment Of Rainstorm Waterlogging Of Buildings Along Underground Rail Transit In Zhengzhou City

In recent years,due to the changes in the precipitation runoff process and the lack of urban drainage capacity caused by urbanization construction,Zhengzhou City has experienced frequent floods in the event of heavy rains,and underground rail transit is difficult to resist floods and floods because it is below the surface.Overcoming the inherent disadvantages,once guilty will bring threats to people's lives,it will also cause huge economic losses.In view of this,this paper constructs the vulnerability assessment system of the underground rail transit in Zhengzhou City by comprehensively considering the attribute data,meteorological conditions,topographical geology,drainage capacity,social economy and other influencing factors of the underground entrance and exit of Zhengzhou rail transit.Based on the analytic hierarchy process(AHP),the vulnerability of the subway entrance and exit is systematically analyzed.At the same time,according to the ground characteristics of Zhengzhou City,the GIS technology and SWMM model are used to construct the internal enthalpy model of the underground rail transit in Zhengzhou City.The simulation analysis of the internal and external traffic conditions at the entrance and exit of the traffic was carried out.Based on the analytic hierarchy process combined with quantitative and qualitative analysis,the vulnerability assessment of storms within the underground rail transit was carried out,and the protection measures for flood control and disaster prevention of underground rail transit were proposed..The main research contents are as follows:(1)Based on the definition of vulnerability of heavy rains in buildings along the underground rail transit of Zhengzhou City,considering the characteristics of urban development and heavy rain,using stress factors,sensitivity and coping capacity as evaluation criteria,based on the representativeness,rationality and science of indicators Sexuality and accessibility,etc.,constructed 20 indicators of Zhengzhou City underground rail transit along the building rainstorm intrinsic vulnerability evaluation index system.(2)Based on the GIS platform and SWMM model,identify the key factors affecting the vulnerability of buildings along the underground rail transit in Zhengzhou City,and on this basis,propose the vulnerability level of storms in the buildings along the underground rail transit,and The level of vulnerability is divided into four levels: slightly fragile,fragile,fragile,and severely vulnerable.(3)Based on the analytic hierarchy process(AHP),the vulnerability of buildings in the underground rail transit of Zhengzhou City is evaluated.Through the comparative analysis of different scenarios,the vulnerability level of storms in each site is calculated,and the buildings along the underground rail transit of Zhengzhou City are analyzed.On the basis of the vulnerability of the torrential rain,the countermeasures against guilt were put forward.