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Calculation Method for Investigating the Behavior of Ground Surface Settlement of Underpass Buildings in TBM Double-Line Tunnels

Author

Listed:
  • Ting Ren

    (School of Civil Engineering, Chongqing Three Gorges University, Chongqing 404020, China)

  • Hailong Zhang

    (School of Civil Engineering, Chongqing University of Arts and Sciences, Chongqing 402160, China)

  • Yuancheng Guo

    (School of Civil Engineering, Chongqing Three Gorges University, Chongqing 404020, China)

  • Yang Tang

    (School of Civil Engineering, Chongqing University of Arts and Sciences, Chongqing 402160, China)

  • Qinglin Li

    (School of Resources and Security, Chongqing University, Chongqing 400045, China)

  • Seisuke Okubo

    (Department of Geo-System Engineering, The University of Tokyo, Tokyo 113-8656, Japan)

Abstract

This study aims to investigate the behavior of ground surface settlement in TBM double-line tunnels constructed under existing buildings and to devise a calculative representation for that behavior. Numerical simulation and field monitoring methods were used to examine the Zhongcong Tunnel in Chongqing Metro Line 9. The ground surface settlement was analyzed using an orthogonal test of 3D numerical simulation methods. The results showed that ground surface settlement was influenced by TBM tunneling parameters and the location of the existing building in the following manner. The existing building reduced the settlement trough width. Surface settlement was increased by frictional and palm surface thrust forces but reduced by grouting pressure. The settlement trough width of the first excavation i z correlated with that of the last excavation i y . To accommodate the influence of existing buildings, the tilt factor of the settlement trough T R was introduced to improve the formula for calculating the ground surface settlement of TBM double-line tunnels. The improved formula was validated by comparing the calculated results with actual measurements.

Suggested Citation

  • Ting Ren & Hailong Zhang & Yuancheng Guo & Yang Tang & Qinglin Li & Seisuke Okubo, 2022. "Calculation Method for Investigating the Behavior of Ground Surface Settlement of Underpass Buildings in TBM Double-Line Tunnels," Sustainability, MDPI, vol. 14(20), pages 1-14, October.
    • Handle: RePEc:gam:jsusta:v:14:y:2022:i:20:p:13410-:d:945824
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    References listed on IDEAS

    as
    1. Jiaxin Liang & Xiaowu Tang & Tianqi Wang & Weikang Lin & Jing Yan & Chunqing Fu, 2022. "Analysis for Ground Deformation Induced by Undercrossed Shield Tunnels at a Small Proximity Based on Equivalent Layer Method," Sustainability, MDPI, vol. 14(16), pages 1-18, August.
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