珠海金琴快线某车行隧道排水系统设计

Design of Jinqin Expressway Road Tunnel Drainage System in Zhuhai

城市车行隧道是城市立体交通的重要组成部分,是改善城市交通畅通运行的重要设施,高效的排水系统设计是保障其正常运行的关键之一。以珠海金琴快线(港湾大道-梅华立交)北师大车行隧道工程为例,介绍其排水系统的设计。车行隧道总汇水面积约为1.54 hm2,排水泵房设计规模为1 260 L/s,采用独立的排水系统,由4台(3用1备)潜污泵抽排至隧道东侧现状金凤路排洪渠,项目建成后运行良好,可为类似项目提供参考。

Urban road tunnel is an important part of urban three-dimensional transportation and significant facility for improving the smooth operation of urban transportation.The design of efficient drainage system is one of the key factors for keeping a tunnel in good function.This paper introduced the design of Beijing Normal University road tunnel drainage system of Jinqin Expressway between Gangwan Avenue and Meihua Interchange in Zhuhai.The water catchment area of the tunnel is about 1.54 hm2,and the design flow of the drainage pumping station with an independent drainage system is 1 260 L/s.There are four submersible sewage pumps(three in use and one as backup) to pump the rainwater to the current Jinfeng Road flood discharge channel on the east side of the tunnel.The project has been running well after completion,which can provide reference for similar projects.