Volume 39 Issue 1
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Article Navigation >  GEOTECHNICAL ENGINEERING TECHNIQUE  > 2025  >  39(1): 113-121
Zhu Yu, Gong Huaishi, Luo Yehua, Yan Xiaozhou, Zeng Ziyue, Li Hongbin, Zeng Yong. Reinforcement effect of support trolley in ultra-small clearance stacking line section of shield tunnel[J]. GEOTECHNICAL ENGINEERING TECHNIQUE, 2025, 39(1): 113-121. doi: 10.20265/j.cnki.issn.1007-2993.2023-0918
Citation: Zhu Yu, Gong Huaishi, Luo Yehua, Yan Xiaozhou, Zeng Ziyue, Li Hongbin, Zeng Yong. Reinforcement effect of support trolley in ultra-small clearance stacking line section of shield tunnel[J]. GEOTECHNICAL ENGINEERING TECHNIQUE, 2025, 39(1): 113-121. doi: 10.20265/j.cnki.issn.1007-2993.2023-0918
shu

Reinforcement effect of support trolley in ultra-small clearance stacking line section of shield tunnel

doi: 10.20265/j.cnki.issn.1007-2993.2023-0918
  • 1.

    Guangzhou Metro Group Co., Ltd., Guangzhou 510300, Guangdong, China

  • 2.

    The Second Engineering Company of CCC Fourth Harbor Engineering Co., Ltd., Guangzhou 510220, Guangdong, China

  • 3.

    School of Civil Engineering, Southwest Jiaotong University, Chengdu 610031, Sichuan, China

  • Received Date: 2023-12-14
  • Accepted Date: 2024-05-09
  • Rev Recd Date: 2024-04-18
  • Publish Date: 2025-02-21
    Abstract
  • In the construction of shield tunnels within ultra-small clear distance stacked line sections, the control of the deformation and stress state of the tunnel lining segments is critical for ensuring construction safety. During the construction of Guangzhou Metro Line 12, the leading tunnel was reinforced using a support trolley. To examine the efficacy of this reinforcement, a computational model was developed utilizing the finite difference software FLAC 3D. Comparative analysis was conducted on the deformation and stress state settlement of tunnel segments under two conditions: without reinforcement measures and with the use of supporting trolleys. The findings indicated that the influence of tunnel segment deformation extended approximately 5 m from the excavation face. The application of the support trolley significantly reduced the maximum vertical and lateral deformations of the segments by 42.7% and 56.7%, respectively. Additionally, the vertical deformation of adjacent existing tunnels was reduced by 14.4% to 24.71%, thereby enhancing operational safety. Furthermore, the use of the support trolley did not induce cracking in the segments but resulted in localized stress concentrations.

     

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