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Factors Influencing Ground Settlement during Tunnel Proximity Construction

Author

Listed:
  • Xun Yuan

    (China Railway Eryuan Engineering Group Co., Ltd., Chengdu 610031, China)

  • Hongchao Wang

    (China Railway Eryuan Engineering Group Co., Ltd., Chengdu 610031, China)

  • Shun Kang

    (School of Emergency Management, Xihua University, Chengdu 610039, China)

  • Changwu Liu

    (College of Water Resource & Hydropower, Sichuan University, Chengdu 610065, China)

  • Yulin Chen

    (College of Water Resource & Hydropower, Sichuan University, Chengdu 610065, China)

  • Xianliang Zhou

    (School of Emergency Management, Xihua University, Chengdu 610039, China)

  • Chengzhe Wu

    (China Chengda Engineering Co., Ltd., Chengdu 610096, China)

  • Haowei Zhu

    (Sichuan Highway Planning, Survey, Design and Research Institute Ltd., Chengdu 610041, China)

  • Changyu Yang

    (China Railway Eryuan Engineering Group Co., Ltd., Chengdu 610031, China)

  • Yong Zhu

    (China Railway Eryuan Engineering Group Co., Ltd., Chengdu 610031, China)

  • Hua Wu

    (China Railway Eryuan Engineering Group Co., Ltd., Chengdu 610031, China)

Abstract

Adjacent tunnel excavation has an adverse impact on existing structures. Based on the engineering project of the Donghuashan Tunnel under-crossing an existing tunnel, this paper designed 25 sets of orthogonal numerical simulation tests to investigate the influential mechanisms of five parameters on ground displacement and deformation. The influential factors are skew angle ( α ), proximity distance ( l ), buried depth ( h ), clearance ( D ), and ratio of tunnel clearances ( ν ). The orthogonal test results revealed that (1) the new tunnel clearance is the main impact factor of both ground settlement and curvature deformation, (2) ground horizontal movement is most significantly influenced by the skew angle between the existing tunnel and the new tunnel, and (3) the new tunnel buried depth is the key influential parameter for ground tilt deformation as well as horizontal deformation. The conclusions of this research suggest that during the period of railway planning, it is very important to plan the buried depths and spans of new tunnels rationally to minimize disturbance to existing tunnels.

Suggested Citation

  • Xun Yuan & Hongchao Wang & Shun Kang & Changwu Liu & Yulin Chen & Xianliang Zhou & Chengzhe Wu & Haowei Zhu & Changyu Yang & Yong Zhu & Hua Wu, 2023. "Factors Influencing Ground Settlement during Tunnel Proximity Construction," Sustainability, MDPI, vol. 15(17), pages 1-19, September.
    • Handle: RePEc:gam:jsusta:v:15:y:2023:i:17:p:13270-:d:1232807
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