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Numerical Analysis of Grouting Reinforcement Effects on Deep Foundation Pits Adjacent to Elevated Railways

Author

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  • Guofei Zhu

    (College of Civil and Transportation Engineering, Shenzhen University, Shenzhen 518060, China)

  • Xianlong Wu

    (College of Civil and Transportation Engineering, Shenzhen University, Shenzhen 518060, China)

  • Xuhui Li

    (Shenzhen Raw Water Co., Ltd., Shenzhen 518000, China)

  • Le Chang

    (Sinohydro Bureau 14 Co., Ltd., Kunming 650041, China)

  • Yongjie Li

    (Shenzhen Raw Water Co., Ltd., Shenzhen 518000, China)

  • Chuang Lv

    (College of Civil and Transportation Engineering, Shenzhen University, Shenzhen 518060, China)

  • Rui Wang

    (College of Civil and Transportation Engineering, Shenzhen University, Shenzhen 518060, China)

  • Yingpeng Li

    (College of Civil and Transportation Engineering, Shenzhen University, Shenzhen 518060, China)

Abstract

To mitigate the impact of foundation pit construction on adjacent existing structures, grouting reinforcement techniques are often employed to enhance the deformation strength of the soil. This study focuses on the expansion project of the Dayun Comprehensive Hub in Shenzhen, conducting full-scale numerical simulations of the excavation of deep foundation pits adjacent to existing elevated railways and examining the effects of different grouting reinforcement schemes. The results indicate that the single-row and double-row grouting schemes increased the bearing capacity of the foundation piles by 23.7% and 31.9%, respectively, significantly enhancing the structural bearing performance. After reinforcement, the maximum deformation position of the elevated bridge foundation piles shifted upward, and the settlement distribution of the cap beam became more concentrated, indicating that grouting reinforcement effectively controlled the ground settlement and the deformation of the foundation piles. Furthermore, compared to controlling the deformation of the retaining structures, grouting reinforcement was more effective in controlling ground settlement and pile deformation, highlighting its advantages in complex environments. Although the double-row grouting scheme demonstrated superior technical performance, the single-row scheme remains the preferred option considering reinforcement efficiency and economic factors.

Suggested Citation

  • Guofei Zhu & Xianlong Wu & Xuhui Li & Le Chang & Yongjie Li & Chuang Lv & Rui Wang & Yingpeng Li, 2024. "Numerical Analysis of Grouting Reinforcement Effects on Deep Foundation Pits Adjacent to Elevated Railways," Sustainability, MDPI, vol. 16(22), pages 1-14, November.
  • Handle: RePEc:gam:jsusta:v:16:y:2024:i:22:p:9984-:d:1522004
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    References listed on IDEAS

    as
    1. Qiqi Lin & Yuhe Zhang & Chenjun Yang & Xiaohua Wang & Tao Lei & Chengwei Ju & Zhanyong Yao & Kai Yao, 2023. "Evaluation of Differential Settlement of Subgrade for Highway-Widening Projects," Sustainability, MDPI, vol. 15(4), pages 1-14, February.
    2. Huajun Xue, 2023. "Research on the Control of Excavation Deformation of Super Deep Foundation Pit Adjacent to the Existing Old Masonry Structure Building," Sustainability, MDPI, vol. 15(9), pages 1-14, May.
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