ISSN 2096-4498

   CN 44-1745/U

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Tunnel Construction >

2023 , Vol. 43 >Issue 8: 1316 - 1326

DOI: https://doi.org/10.3973/j.issn.2096-4498.2023.08.006

Measurement Analysis of Multi-Divisional Foundation Pit Excavation and Deformation of Adjacent Shield Tunnel

  • WEI Gang ,
  • GUO Binglai ,
  • WU Haifeng ,
  • WANG Zhe ,
  • CHEN Bo ,
  • SUN Bo
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  • (1. Key Laboratory of Safe Construction and Intelligent Maintenance for Urban Shield Tunnels, Hangzhou City University, Hangzhou 310015, Zhejiang, China; 2. Zhejiang Engineering Research Center of Intelligent Urban Infrastructure， Hangzhou City University, Hangzhou 310015, Zhejiang, China; 3. College of Civil Engineering, Zhejiang University of Technology, Hangzhou 310014, Zhejiang, China; 4. Zhejiang Urban Construction Survey and Research Institute Co., Ltd., Hangzhou 311112, Zhejiang, China; 5. College of Information Engineering, Zhejiang University of Technology, Hangzhou 310014, Zhejiang, China)

Online published: 2023-09-11

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Abstract

In order to control the deformation of the adjacent shield tunnel caused by the excavation of the foundation pit in the neighboring zones, the monitoring data of foundation pit zones and their adjacent metro tunnel are analyzed to elucidate the influence of the law of foundation pit zoning excavation on the deformation of adjacent metro tunnel. Moreover, the effect of the foundation pit excavation on the adjacent tunnel is analyzed, and the connection between the pit deformation and the deformation of the adjacent tunnel is explored. The results reveal the following: (1) The shield tunnel′s longitudinal deformation growth is greater during the pit structure′s construction phase than during the pit′s excavation phase; the increased horizontal displacement during the construction of the structure is approximately three times the excavation phase. (2) There is a lag of approximately 60 days between the pit sidewalls′ development and the adjacent tunnel′s longitudinal deformation. However, the horizontal convergence of the tunnel has good consistency with the deformation law of the sidewall of the foundation pit.

Key words： foundation pit excavation; adjacent shield tunnel; multidivisional excavation; measurement analysis of deformation

Cite this article

WEI Gang , GUO Binglai , WU Haifeng , WANG Zhe , CHEN Bo , SUN Bo . Measurement Analysis of Multi-Divisional Foundation Pit Excavation and Deformation of Adjacent Shield Tunnel[J]. Tunnel Construction, 2023 , 43(8) : 1316 -1326 . DOI: 10.3973/j.issn.2096-4498.2023.08.006

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