LIAO Gai-xia,LIU Xing,GUO Zhi-jie.Design of Haicang Tunnel Drainage System in Xiamen[J].China Water & Wastewater,2024,40(14):63-68.
厦门海沧隧道排水系统设计
- Title:
- Design of Haicang Tunnel Drainage System in Xiamen
- Keywords:
- submarine tunnels; drainage system; internal structure seepage; firefighting wastewater; wastewater pumping room
- 摘要:
- 厦门海沧隧道内排水系统设计的重难点是废水排除。为解决排水系统设计的关键技术问题，对隧道的排水量、废水泵房及污水泵房的形式、排水泵选型及数量、隧道运营初期的临时排污泵设计、废水泵房的出水总干管等进行分析。结果表明：对于矿山法海底隧道，其内部的结构渗水与消防废水等宜采用清污分排；位于隧道最低点的废水池建议设计为共墙的2格水池，其内部可围绕废水泵设计不锈钢检修平台；废水泵房可选用长轴式深井排污泵；隧道运营初期可采用2台临时排污泵进行排水；废水泵房的出水总干管建议1用1备，可采用316L不锈钢管与内外涂环氧树脂钢管相组合的设计。
- Abstract:
- The design of wastewater discharge in Xiamen Haicang tunnel poses a significant and challenging issue within its drainage system. This paper analyzed the determination of tunnel drainage volume, the configuration of wastewater pumping room and sewage pumping room, the selection and quantity of drainage pumps, the design of temporary sewage pumps during initial tunnel operation, and the main outlet pipe of wastewater pumping room, so as to address the key technical challenges in drainage system design of Haicang tunnel. Regarding the undersea tunnel constructed using mining method, it was essential to ensure that the internal structure seepage, and firefighting wastewater were discharged separately. The proposed design for the wastewater tank at the lowest point of the tunnel was a two?cell tank with a common wall. Additionally, a stainless steel maintenance platform was designed around the wastewater pump in the wastewater tank. For the lowest point wastewater pumping room of the long-distance submarine tunnel, it was recommended to utilize a long-shaft deep-well sewage pump. Temporary sewage pumps might be utilized for tunnel drainage during the initial stage of operation. It was recommended to use a main outlet pipe for the wastewater pumping room with a backup, and consider adopting a design that combined 316L stainless steel pipe with epoxy resin coated steel pipe both inside and outside.
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