城市下穿式隧道排水设计

Discussion on Drainage Design of Urban Underpass Tunnel

摘要:

近年来城市下穿式隧道的洪涝灾害时有发生，除造成交通运输中断外，还可能造成较大的经济损失甚至人员伤亡。结合广州地区下穿式隧道排水设计，总结下穿式隧道排水泵站设计方法、特点和主要技术参数，对排水泵站的位置、数量、型式、集水池容积、出水管和水雨情监测预警系统等进行逐一分析，并对隧道排水工程设计的常见问题，包括横截式排水设置、集水池设置闸门、隧道雨污分流、水泵并联运行流量折减和排水泵站与海绵城市结合等进行探讨，为类似隧道工程排水设计提供一些有用的借鉴。

Abstract:

In recent years, the flood disaster of urban underpass tunnel occurs from time to time, which will not only cause the traffic interruption, but may also cause the great economic losses and casualties. Combined with the drainage design of underpass tunnel in the area of Guangzhou, the design method, characteristics and main technical parameters of underpass tunnel drainage pumping station are summarized. The position, quantity and type of drainage pumping station, the volume and effluent pipe of catchment tank, and the water and rain monitoring and early-warning system are analyzed one by one. The common problems in the design of tunnel drainage engineering including the arrangement of transverse drainage, the installation of gates in catchment tank, the separation of tunnel rainwater and sewage, the flow reduction of parallel operation of pumps, and the combination of drainage pumping station and sponge city are discussed, which can provide some useful reference for the drainage design of similar tunnel projects.