城市下穿隧道排水系统设计综述

Summary on Design of Drainage System for Urban Underpass Tunnel

本文结合江苏省某市新区市政工程对城市下穿隧道排水系统中雨、废水泵房设置位置及数量,雨水流量设计参数(包括设计重现期、坡面集水时间、汇水面积)及雨、废水泵房水泵配置的设计进行阐述,并结合隧道养护管理经验,提出设计中还应着重注意隧道及雨、废水泵房增设给水冲洗措施、管道清淤措施、隧道最低点增设水位尺及摄像头与监控中心联网,为日后城市下穿隧道排水系统设计提供一定参考。

This article describes the design of drainage systems in urban under-crossing tunnels,location and number of rainwater and waste water pump rooms,design parameters for rainwater flow(including recurrence interval,time of overland flow concentration,catchment area),and the configuration of water pumps for rainwater and waste water pump rooms by municipal engineering of a new area in a city in south China’s Jiangsu Province.Based on management experience in under-crossing tunnel maintenance,this article points out that it is critical to adopt additional measures such as flushing water supply pipes,dredging pipelines,installing water level gauges at the lowest point of the tunnels,and networking the surveillance cameras to the monitoring center in the tunnels and the rainwater and waste water pump rooms,providing some reference for the design of future drainage systems in urban under-crossing tunnels.