Volume 38 Issue 5
Oct.  2024
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Article Navigation >  GEOTECHNICAL ENGINEERING TECHNIQUE  > 2024  >  38(5): 560-565
Li Wenqian, Huang Gaoliang, Zhu Xiaoang, Liu Minghong, Chen Yuchao, Hu Anfeng. Influence of Double Track Shield Tunnel Overpassing Construction on Existing Subways Based on HSS Model[J]. GEOTECHNICAL ENGINEERING TECHNIQUE, 2024, 38(5): 560-565. doi: 10.3969/j.issn.1007-2993.2024.05.009
Citation: Li Wenqian, Huang Gaoliang, Zhu Xiaoang, Liu Minghong, Chen Yuchao, Hu Anfeng. Influence of Double Track Shield Tunnel Overpassing Construction on Existing Subways Based on HSS Model[J]. GEOTECHNICAL ENGINEERING TECHNIQUE, 2024, 38(5): 560-565. doi: 10.3969/j.issn.1007-2993.2024.05.009
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Influence of Double Track Shield Tunnel Overpassing Construction on Existing Subways Based on HSS Model

doi: 10.3969/j.issn.1007-2993.2024.05.009
  • 1.

    China Railway Tenth Bureau Group Urban Rail Transit Engineering Co., Ltd., Guangzhou 510000, Guangdong, China

  • 2.

    Hangzhou Construction Project Quality and Safety Supervision Station, Hangzhou 310005, Zhejiang, China

  • 3.

    Research Center of Coastal and Urban Geotechnical Engineering, Zhejiang University, Hangzhou 310030, Zhejiang, China

  • Received Date: 2023-08-26
  • Accepted Date: 2024-05-09
  • Rev Recd Date: 2024-04-24
    • Available Online: 2024-10-09
  • Publish Date: 2024-10-09
    Abstract
  • A three-dimensional finite element model was established based on the HSS constitutive model for a newly constructed shield tunnel adjacent to an existing subway project. The correctness of the numerical calculation was verified by comparing it with measured data. On this basis, further analysis was conducted on the vertical deformation characteristics of existing tunnels caused by the construction of new tunnels, as well as the influence of the two parameters of tunnel horizontal clearance and overlap angle on the deformation of existing tunnels. The results show that the calculated results of HSS model are in good agreement with the measured values, and can effectively predict the deformation of existing subway tunnel. Under the influence of the new tunnel overpassing, the existing subway tunnel has vertical uplift deformation, and the deformation mainly occurs in the range of 1.5 times the diameter of the new tunnel before the shield tunneling under-crossing to 2 times the diameter of the new tunnel after the crossing. The uplift peak point of the existing subway tunnel will shift with the second crossing of the shield, and its vertical deformation curve shows a "double peak" trend. Increasing the horizontal clearance of double track tunnels and the overlapping angle of new and old tunnels can reduce the deformation of existing tunnels.

     

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