SONG Jia-mei,GAO Zhen,YANG Yuan-jing,et al.Design of Qianhai-Nanshan Deep Tunnel Drainage System in Shenzhen[J].China Water & Wastewater,2021,37(18 18):76-81.
Design of Qianhai-Nanshan Deep Tunnel Drainage System in Shenzhen
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第37卷
Number:
18 18
Page:
76-81
Column:
Date of publication:
2021-09-17
- Abstract:
- Qianhai-Nanshan deep tunnel drainage system in Shenzhen is the first complex deep tunnel project in China, which integrates three functions: sewage collection in the dry season, pollution control and urban flood drainage security in the rainy season. The project provides a new option to solve the drainage problem in old cities and central urban areas, and provides a typical case for exploring the comprehensive utilization of underground space in developed cities. In the project, the leaked sewage in the dry season and the initial rainwater in the rainy season with the highest pollution concentration are treated by the pretreatment station and transferred to Nanshan wastewater treatment plant. The effluent is discharged after enhanced treatment. The subsequent rainwater is regulated and stored by the volume of the tunnel, and then transferred to Nanshan wastewater treatment plant and discharged into the sea after primary enhanced treatment. When the rainfall continues to increase and the water level in the tunnel exceeds the starting water level of the drainage pump of the hub pump station, the drainage pump starts and the flood is directly discharged into the sea. The design of the inlet shaft, pretreatment station, main tunnel, hub pumping station of the system were introduced in detail, and the key points and difficulties of the design were summarized. The mathematical model simulation indicated that the drainage standard of Qianhai area will raise to 50-year return period after the completion of the relevant projects, and the water environment quality of Dachanwan Bay Area will be effectively improved.
Last Update:
2021-09-17