谈城市下穿隧道排水系统设计

Design of waster water engineering system for urban underpass tunnel

城市下穿隧道排水系统分为雨水系统、废水系统,结合厦门市环岛路(鳌山路—高殿二号路段)工程下穿隧道工程,对城市下穿隧道排水系统设计进行分析,比较不同设计重现期的隧道引道段雨水量。为保障隧道排水安全,隧道雨水设计重现期取50年;废水泵房内加设备用泵;隧道低点废水泵房压力出水管采用双向双路敷设方式,并进行独立排放。

The waster water engineering system of urban underpass tunnel is divided into storm water system and wastewater system. In this paper,combined with the underpass tunnel project of Huandao Road(Aoshan Road-Gaodian Section 2) in Xiamen,the design of waster water engineering system of urban underpass tunnel is analyzed,and the storm water quantity of tunnel approach section in different design recurrence periods is compared. In order to ensure the safety of tunnel drainage,the recurrence interval for tunnel storm water design should be 50 years,spare pumps should be added to the storm water pumping station,and the pressure outlet pipe of the low-point wastewater pumping station in the tunnel should be laid in two-way and discharge independently.