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.
Design of Haicang Tunnel Drainage System in Xiamen
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第40卷
Number:
第14期
Page:
63-68
Column:
Date of publication:
2024-07-17
- Keywords:
- submarine tunnels; drainage system; internal structure seepage; firefighting wastewater; wastewater pumping room
- 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.
Last Update:
2024-07-17