水利水电技术（中英文）2022，Vol.53Issue(4)：41-54,14.DOI:10.13928/j.cnki.wrahe.2022.04.004
郑州市"7·20"特大洪水对地铁工程防洪影响研究
Study on 7·20 Extreme Rainstorm and metro line flood control in Zhengzhou
摘要
Abstract
Under the situation of global climate change,extreme weather and climate events are frequent,which have seriously affected the development of underground construction.Considering the extreme rainstorm occurred in July 20,2021 in Zhengzhou(7·20 Rainstorm),the generalized extreme distribution(GEV)model and the recurrence period calculation method are put for-ward.According to the theory of two-dimensional and non-constant flow,urban flood flow is simulated and an urban flood simula-tion model is constructed.Through calculation,it shows that the frequency of 7·20 rainstorm in Zhengzhou is greatly over once-in-a-thousand year.Metro Ring Line 5 is selected as a calculation example,and 36 flood control risk points are designed.The rainstorm simulation model is used to obtain the water depth at 36 flood control points along the Metro Line 5.Through improve-ment on the flood simulation model,the calculated flood process in Zhengzhou urban area can reasonably simulate water logging in low locations,street flood formation,the accumulated water depth at junction points between road and bridge.The improved model can also reasonably reflect the situation of channel water drainage.The results show that taking 7·20 rainstorm as a veri-fication standard,the submerged water depth would overpass 2.0 m for the most of flood control risk points,and the maximum submerged depth could be nearly 3.0 m.According to the flood simulation and recurrence period calculation results,the flood risk threshold and the metro project flood risk classification are proposed,and the early warning measures(for three stages)are put forward.It can be proved through verification that the study results have certain reference values for urban short-duration ex-treme rainstorm analysis,urban underground architecture flood control and metro line operation management.关键词
"7·20"特大暴雨/GEV分布模型/洪水模拟模型/地铁工程/防洪/郑州市/降水/气候变化Key words
7·20 Extreme Rainstorm/the GEV model/flood simulation/subway/flood control/Zhengzhou/precipitation/cli-mate change分类
建筑与水利引用本文复制引用
徐苏容,周振民..郑州市"7·20"特大洪水对地铁工程防洪影响研究[J].水利水电技术（中英文）,2022,53(4):41-54,14.基金项目
National Natural Science Foundation of China(50579020)国家自然科学基金项目(50579020) （50579020）
