(1.中佑勘察设计有限公司， 吉林 长春 132000;
吴远志（1977—）， 男， 本科， 总工程师， 从事市政设计工作。
In recent years, the extreme weather events are frequently, and there are serious flood disasters in many cities. Guangzhou is located in the southernmost part of China and has the abundant rainfall all the year round. The rainstorm weather in Guangzhou is more frequent and destructive than in the past. And there are many instantaneous rainfalls exceeding the historical extremes, which cause the serious pressure on the road traffic in Guangzhou, especially for the safety of urban tunnels. The project team has made relevant research on the flood control emergency of the tunnel project under the municipal roads in Guangzhou. It is proposed that when the water in the tunnel reaches the warning water level, the signal light will be on, and the barrier gates will be automatically put down at both ends of the tunnel to prohibit the vehicle traffic. The brief introduction of tunnel drainage, and the objectives and principles of tunnel flood control emergency design are proposed. Combined with the application analysis of the system, the necessity of flood control emergency system in the new urban tunnel projects and the existing urban tunnel projects are proposed, and its application is discussed.