深埋地下车站排水设计探讨

研究深埋地下车站污水系统、废水系统的设计难点和技术解决方案。以地下埋深约 60 m 的青秀山站为例，提出深埋车站污水系统、废水系统排水提升的设备选型和排水方式。通过技术分析和方案比选，明确青秀山站污 水系统采用半真空污水提升装置并采用二次接力提升的排水方式；对于站厅层和站台层间实土层约为 20 m、废水无法重力流到站台层排水沟的现象，采用站厅层设置集水坑的方案。站台层及以上楼层的废水均通过设置于站厅 层的集水坑收集，再经潜水泵二次接力，就近排入集水坑或直接提升排至室外。站台层的主废水泵房提升泵不采 用潜水式的潜水泵，而是采用置外型立式泵提升方式。青秀山站的污水系统、废水系统的排水方式在实际运维中 运行良好，为深埋地下车站的排水系统设计提供了新思路。

Drainage Design of Deep-Buried Underground Stations

The challenges and technical solutions of sewage and wastewater systems in deep underground stations are studied. Selection and drainage methods for the sewage and drainage systems of deep-buried stations are proposed based on the example of the Qingxiushan station, which has an underground burial depth of approximately 60 m. Based on technical analysis and scheme selection, it is clear that the Qingxiushan Station sewage system uses a semi-vacuum sewage lifting device and a secondary relay lifting drainage method. Because of a 20 m thick layer of soil between the station hall and the platform floors, the wastewater cannot flow under gravity to the drainage ditch on the platform floor. Therefore, a plan was adopted to install water puddle at the station hall floor level. Wastewater from the station hall floor and above is collected in collection puddles setup on the station hall floor and discharged into the collection puddles or directly lift drainage to the external sewage system. The main waste pump station lifting pump on the platform is not of submersible type but uses a vertical lifting method. The sewage system and the drainage method of the wastewater system installed at Qingxiushan station perform well in actual operating conditions; thus, the effective implementation of the novel idea for an underground station drainage system is demonstrated.