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Investigating Surface Settlements During Shield Tunneling Using Numerical Analysis

Author

Listed:
  • Ruixia He

    (Department of Civil and Transportation Engineering, Henan University of Urban Construction, Pingdingshan 467036, China
    Department of Civil Engineering, University of Ottawa, Ottawa, ON K1N 6N5, Canada)

  • Ziwen Zhou

    (Department of Civil Engineering, University of Ottawa, Ottawa, ON K1N 6N5, Canada
    Nanjing Institute of Environmental Sciences, Ministry of Ecology and Environment of the People’s Republic of China, Nanjing 210042, China)

  • Shuai Li

    (Department of Civil and Transportation Engineering, Henan University of Urban Construction, Pingdingshan 467036, China)

  • Sai Vanapalli

    (Department of Civil Engineering, University of Ottawa, Ottawa, ON K1N 6N5, Canada)

Abstract

The development of the subway system in Shenyang City, China, plays a vital role in alleviating traffic congestion and promoting sustainable societal growth. However, the deformation of the surface caused by the tunneling of the shield presents a significant threat to the structural integrity of Shenyang Subway Line 2 and adjacent geotechnical structures. To tackle this challenge, a set of FEA (finite element analysis) simulations were carried out to examine surface deformation under various construction scenarios for Line 2. These simulations were compared with empirical formulas and numerical analyses conducted using Midas GTS NX 2019 software, in addition to actual site measurements. The outcomes of the finite element analysis (FEA) demonstrated a closer alignment with the empirical data than with traditional formulas. The maximum deformation was observed to be approximately twice as large as the equivalent diameter at the back of the excavation face. The analysis indicated that surface deformation is inversely correlated with overburden thickness ( H ), soil elasticity ( E ), and the grout filling rate of the shield tail ( ψ ), while it is directly proportional to the shield’s outer diameter ( D ). This study provides important methods used in the shield tunneling process employed in the Shenyang subway and suggests that the developed methodologies may be applicable to similar subway projects.

Suggested Citation

  • Ruixia He & Ziwen Zhou & Shuai Li & Sai Vanapalli, 2024. "Investigating Surface Settlements During Shield Tunneling Using Numerical Analysis," Sustainability, MDPI, vol. 17(1), pages 1-18, December.
    • Handle: RePEc:gam:jsusta:v:17:y:2024:i:1:p:20-:d:1551716
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    References listed on IDEAS

    as
    1. Rui Xu & Xunchang Li & Wei Yang & Minou Rabiei & Chenglong Yan & Songtao Xue, 2019. "Field Measurement and Research on Environmental Vibration due to Subway Systems: A Case Study in Eastern China," Sustainability, MDPI, vol. 11(23), pages 1-12, December.
    2. 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.
    3. Yanxia Gao & Yiwen Liu & Pengju Tang & Chunqiao Mi, 2022. "Modification of Peck Formula to Predict Surface Settlement of Tunnel Construction in Water-Rich Sandy Cobble Strata and Its Program Implementation," Sustainability, MDPI, vol. 14(21), pages 1-11, November.
    Full references (including those not matched with items on IDEAS)

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