摘要
城市下凹式立交桥因其桥下路面常低于周边区域地形,极易形成城市区域的"人为滞水点",在遭遇降雨时频繁发生内涝积水灾害,对城市交通、行人和车辆的安全构成了严重的危害。因此,有效模拟城市立交桥区域的暴雨洪水淹没程度,对城市防洪减灾和交通应急管理具有重要的现实意义,同时可以为解决城市内涝问题提供重要的科技支撑。以济南市历下区立交桥为例,采用Mike Urban模型和Mike21FM模型,依据研究区域数字高程数据,2007年7月18日黄台桥雨量站实测3h降雨数据以及不同重现期的设计降雨过程,对立交桥区域的暴雨积水程度进行模拟计算与分析。研究结果表明,2007年"7·18"暴雨发生时,济南市历下区立交桥桥下最低洼区域积水深度可达近1.95m左右,其积水深度高于济南市100年一遇暴雨的积水深度。
The urban concave overpass bridges can easily become"artificial waterlogging zone"since the area beneath the bridge is usually lower than the surrounding areas,which leads to frequent waterlogging disasters,endangering the safety of urban traffic,pedestrians,and vehicles.Therefore,effective simulation of rainstorm waterlogging processes in urban overpass bridge area will have important practical significance for urban flood control,disaster reduction,and traffic emergency management.It can provide important technical support for solving the urban waterlogging problems.In this study,both Mike Urban and Mike21 FM models were used to simulate the waterlogging processes of the 3 h rainstorm observed in July 18,2007 at Huangtai Bridge rain gauge station and the design precipitation with different return periods at the Lixia overpass bridge area in Ji′nan city.The results of this study showed that the depth of waterlogging in the lowest area under the Lixia overpass bridge could reach about 1.95 m during the 2007.07.18 rainstorm event,which was higher than that in a 100-year rainstorm in Ji′nan city.
作者
任梅芳
徐宗学
初祁
汪中华
杜成玉
REN Meifang;XU Zongxue;CHU Qi;WANG Zhonghua;DU Chengyu(College of Water Sciences,Beijing Normal University,Beijing 100875,China;Beijing Key Laboratory of Urban Hydrological Cycle and Sponge City Technology,Beijing 100875,China;Ji′nan Hydrology Bureau,Ji′nan 250014,China;Binzhou Hydrology Bureau,Binzhou 256609,China)
出处
《南水北调与水利科技》
CSCD
北大核心
2018年第5期9-15,共7页
South-to-North Water Transfers and Water Science & Technology
基金
济南市海绵城市水循环演变与水文过程模拟项目(230200064)~~
关键词
暴雨积水
立交桥
MIKE模型
rainstorm waterlogging
overpass bridge
MIKE model
