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Study on the Stability and Seepage Characteristics of Underwater Shield Tunnels under High Water Pressure Seepage

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  • Luhai Chen

    (Key Laboratory of In-Situ Property-Improving Mining of Ministry of Education, Taiyuan University of Technology, Taiyuan 030024, China
    Department of Mining Engineering, Taiyuan University of Technology, Taiyuan 030024, China)

  • Baoping Xi

    (Key Laboratory of In-Situ Property-Improving Mining of Ministry of Education, Taiyuan University of Technology, Taiyuan 030024, China
    Department of Mining Engineering, Taiyuan University of Technology, Taiyuan 030024, China)

  • Yunsheng Dong

    (Key Laboratory of In-Situ Property-Improving Mining of Ministry of Education, Taiyuan University of Technology, Taiyuan 030024, China
    Department of Mining Engineering, Taiyuan University of Technology, Taiyuan 030024, China)

  • Shuixin He

    (Key Laboratory of In-Situ Property-Improving Mining of Ministry of Education, Taiyuan University of Technology, Taiyuan 030024, China
    Department of Mining Engineering, Taiyuan University of Technology, Taiyuan 030024, China)

  • Yongxiang Shi

    (Key Laboratory of In-Situ Property-Improving Mining of Ministry of Education, Taiyuan University of Technology, Taiyuan 030024, China
    Department of Mining Engineering, Taiyuan University of Technology, Taiyuan 030024, China)

  • Qibo Gao

    (Key Laboratory of In-Situ Property-Improving Mining of Ministry of Education, Taiyuan University of Technology, Taiyuan 030024, China
    Department of Mining Engineering, Taiyuan University of Technology, Taiyuan 030024, China)

  • Keliu Liu

    (Key Laboratory of In-Situ Property-Improving Mining of Ministry of Education, Taiyuan University of Technology, Taiyuan 030024, China
    Department of Mining Engineering, Taiyuan University of Technology, Taiyuan 030024, China)

  • Na Zhao

    (College of Water Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, China)

Abstract

The construction of underwater shield tunnels under high water pressure conditions and seepage action will seriously impact the stability of the surrounding rock. In this study, an analytical model for the strength of the two-lane shield tunneling construction under anisotropic seepage conditions was established, and a series of simulations were carried out in the engineering background of the underwater section of Line 2 of the Taiyuan Metro in China, which passes through Yingze Lake. The results show that: (1) the surface settlement has a superposition effect, and the late consolidation and settlement of the soil body under seepage will affect the segment deformation and the monitoring should be strengthened; (2) under the influence of the weak permeability of the lining and grouting layers, the pore pressure on both sides of the tunnel arch girdle is reduced by about 72% compared with the initial value, with a larger hydraulic gradient and a 30% reduction at the top of the arch; (3) within a specific range, the tunneling pressure can be increased, and the grouting pressure and the thickness of grouting layer can be reduced to control the segment deformation; (4) the more significant the overlying water level is, the larger the maximum consolidation settlement and the influence range of surface settlement. This study can provide a reliable reference for underwater double-lane shield tunnel design and safety control.

Suggested Citation

  • Luhai Chen & Baoping Xi & Yunsheng Dong & Shuixin He & Yongxiang Shi & Qibo Gao & Keliu Liu & Na Zhao, 2023. "Study on the Stability and Seepage Characteristics of Underwater Shield Tunnels under High Water Pressure Seepage," Sustainability, MDPI, vol. 15(21), pages 1-17, November.
    • Handle: RePEc:gam:jsusta:v:15:y:2023:i:21:p:15581-:d:1273301
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    References listed on IDEAS

    as
    1. Zhengde Wei & Yanpeng Zhu, 2021. "A Theoretical Calculation Method of Ground Settlement Based on a Groundwater Seepage and Drainage Model in Tunnel Engineering," Sustainability, MDPI, vol. 13(5), pages 1-12, March.
    2. Xilin Lu & Haoran Wang & Maosong Huang, 2014. "Upper Bound Solution for the Face Stability of Shield Tunnel below the Water Table," Mathematical Problems in Engineering, Hindawi, vol. 2014, pages 1-11, October.
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