Volume 39 Issue 1
Feb.  2025
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Wang Huinian, Kang Bo, Xie Enlin, Li Pengfei, Pang Yuekui, Li Bing. Influence caused by reinforcement range of connecting passage on main tunnels[J]. GEOTECHNICAL ENGINEERING TECHNIQUE, 2025, 39(1): 25-34. doi: 10.20265/j.cnki.issn.1007-2993.2024-0252
Citation: Wang Huinian, Kang Bo, Xie Enlin, Li Pengfei, Pang Yuekui, Li Bing. Influence caused by reinforcement range of connecting passage on main tunnels[J]. GEOTECHNICAL ENGINEERING TECHNIQUE, 2025, 39(1): 25-34. doi: 10.20265/j.cnki.issn.1007-2993.2024-0252
shu

Influence caused by reinforcement range of connecting passage on main tunnels

doi: 10.20265/j.cnki.issn.1007-2993.2024-0252
  • 1.

    Sinohydro Bureau 5 Co., Ltd., Chengdu 610066, Sichuan, China

  • 2.

    Beijing University of Technology, Beijing 100124, China

  • Received Date: 2024-06-06
  • Accepted Date: 2024-08-29
  • Rev Recd Date: 2024-08-12
  • Publish Date: 2025-02-21
    Abstract
  • The influence caused by the reinforcement range of the connecting passage on the main tunnel during the construction process of the connecting passage of subway shield tunnels was investigated. Through numerical simulation, the influence of the reinforcement range of the stratum on the mechanical behavior of the main tunnel segment, such as the overall deformation of the main tunnel segment, the stress and displacement of the special segment, and the stress state of the bolts between the special and ordinary segments, was comprehensively analyzed. The results show that: (1) Ground reinforcement can significantly reduce the maximum tensile stress of special segments, but it will significantly increase the maximum compressive stress, and the control effect on lateral expansion displacement and vertical convergence displacement was limited. (2) Proper reinforcement can significantly reduce the maximum tensile stress of the bolt, greatly reduce the top settlement displacement of the transverse channel, and slightly reduce the bottom uplift displacement, which is conducive to the overall deformation control of the transverse channel. However, when the reinforcement range is too large, the maximum tensile stress of the bolt rises significantly. Considering the factors such as the economy and construction effect, full-length reinforcement should be avoided.

     

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