城市轨道交通系统排水工程设计探索

Exploration of Drainage Engineering Design for Urban Rail Transit System

轨道交通线产生的污水通常纳入污水管网,当污水无条件重力流进入污水管网时,通常采用污水泵或真空泵将污水压力外排。但少部分污水排放点附近无市政污水管网,为了减少污水对水环境质量的影响,需要将污水处理后排放。除污水外,轨道交通线雨水的重现期取值较大,雨水量大,当现有雨水管道无法容纳全部轨道交通系统产生的雨水,又无条件设专用雨水管道时,考虑错峰排入现有城市雨水管网,需要设置容积合理的雨水调蓄池,同时可以考虑回用部分雨水。轨道交通线的车辆基地的设计雨水量大,用水量大,设置雨水调蓄池是比较合理的。

Sewage drainage from urban rail transit was usually included in the sewage network. It was discharged by pressure or vacuum pumps into the network when the gravity flow was out of work. A little sewage was treated by in-situ treatment system before discharge when sewage network was absence. Recurrence interval of urban rail transit was bigger than that of normM facilities. When the municipal storm sewer cannot accommodate rainwater from urban rail transit, a separate storm water system should be set to trans- port the storm water into the near water body. Otherwise, reasonable rain water storage ponds should be designed to keep the rainfall from producing rain peaks. Reusing rainwater in storage ponds was economical and sustainable, and rainwater from urban rail base should be stored and reused because base need more water than other station.