广州萝岗新城外环路下穿北二环高速隧道防洪排涝方案优化

Optimization of Flood Control and Waterlogging Drainage Scheme for Guangzhou Luogang New City Outer Ring Road Underpassing North 2 nd Ring Expressway Tunnel

随着经济和社会的发展,城市机动车保有量迅速增长,原有道路的平交模式难以适应现代汽车交通的需要,阻碍着汽车化在城市的实现。为此广州也修建了大量的城市下穿隧道和立交桥。但近年来由强降雨引起的城市下穿隧道及立交桥下低洼处存在大量积水的现象时有发生,且有愈演愈烈的趋势。城市内涝积水给人们的出行带来了很大的不便,严重时竟引发行人的死亡和失踪事件,造成巨大损失、教训深刻。以广州市某临河下穿隧道工程为例,结合“5.21-5.22”广州特大暴雨数据,通过对汇水区域的重新梳理,对该隧道进行防洪排涝方案进行优化,并增设防汛安全告警系统,为广州等南方多雨地区其他城市隧道工程提供了有益的参考。

With the development of economy and society,the number of motor vehicles in the cities has increased rapidly.The original intersecting mode at grade of roads is difficult to meet the needs of modern automobile traffic,which hinders the realization of automobile in the cities.For this reason,a large number of urban underpass tunnels and overpasses have been built in Guangzhou.However,in recent years,the phenomenon of a large number of waterlogging at the low-lying places of urban underpass tunnel and interchange caused by heavy rainfall has occurred from time to time,and there is a tendency to get worse.The urban waterlogging has brought the great inconvenience to the travel of the people,and even led to the death and disappearance of issuers in serious cases,which result in huge losses and profound lessons.Taking a river underpass tunnel project in Guangzhou as an example,combined with the"5.21-5.22"heavy rain data in Guangzhou,through re-sorting up the catchment areas,the flood control and waterlogging drainage scheme of the tunnel is optimized,and the flood control safety alarming system is added,which provide a useful reference for the other urban tunnel projects in the southern rainy areas such as Guangzhou.