Comprehensive comparison of various scenarios to groundwater control for a deep metro excavation in highly-permeable aquifers
Author:
Affiliation:

1.College of Civil and Transportation Engineering, Shenzhen University, Shenzhen 518060, Guangdong, P. R. China;2.Shenzhen Key Laboratory of Green, Efficient and Intelligent Construction of Underground Metro Station, Shenzhen University, Shenzhen 518060, Guangdong, P. R. China;3.Key Laboratory for Coastal Urban Resilient Infrastructures of Ministry of Education, Shenzhen University, Shenzhen 518060, Guangdong, P. R. China

Clc Number:

TU924

Fund Project:

National Natural Science Foundation of China (No. 51938008); China Postdoctoral Science Foundation (No. 2021T140474)

  • Article
  • |
  • Figures
  • |
  • Metrics
  • |
  • Reference
  • |
  • Related
  • |
  • Cited by
  • |
  • Materials
  • |
  • Comments
    Abstract:

    For comparison and selection of groundwater control scenarios for subway deep foundation pits in deep and high permeable aquifers, this paper presents the qualitative and quantitative comparison and selection framework by using analytic hierarchy process, fuzzy comprehensive evaluation and numerical calculation methods. Comprehensive comparison of various scenarios to groundwater control for a deep metro excavation in highly-permeable aquifers is established. Taking Shuibu metro station in Fuzhou as an example, five different groundwater control scenarios (i.e. open dewatering, fully penetrating curtains, deep horizontal bottom sealing curtain, partially penetrating curtains with dewatering, underwater excavation) are evaluated and analyzed using the proposed method. The results show that the scenario of both partially penetrating curtains and dewatering is the best for groundwater control. Then, the numerical simulation is used to analyze the surrounding surface settlement caused by dewatering. The results show that the surface settlement is in the range of 12-23 mm, which shows that the partially penetrating curtains with 42 m length can effectively control the surface settlement caused by dewatering. This method provides a solution for comparison and design of groundwater control scenarios for subway foundation pits in deep and high permeable aquifers.

    Reference
    Related
    Cited by
Get Citation

曹成勇,彭远胜.深厚强透水含水层地铁深基坑地下水控制方案综合比选方法[J].土木与环境工程学报(中英文),2024,46(4):82~90

Copy
Share
Article Metrics
  • Abstract:
  • PDF:
  • HTML:
  • Cited by:
History
  • Received:January 11,2022
  • Revised:
  • Adopted:
  • Online: July 07,2024
  • Published:
Article QR Code