Abstract: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.
