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This study aims at the problems of the enclosure structure in the excavation of deep foundation pits in the subway, taking the Yucun South Road Station of the first phase project of Shijiazhuang Rail Transit Line 4 as an example to explore the application of the “soil nailing + spray concrete” enclosure form. In order to solve the problems of low efficiency and long construction period of deep excavation pits in subway stations, this enclosure form significantly saves the length of enclosure piles and the number of steel supports. Composite soil nail support not only retains the function of soil nail walls, but also solves the problems of water isolation and self-reliance of soil, ensuring the safety, quality and progress of foundation pit excavation construction, and achieving good economic benefits. This study can provide a reference for similar projects.

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Application of “Soil Nailing + Shotcrete” Enclosure in Deep Foundation Pit Excavation of Subway

  • 会议论文

  • 发表日期：

    2025年

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  • Zhijia Peng,
  • Shilin Xu,
  • Ying Liu,
  • Guodong Cheng

摘要

This study aims at the problems of the enclosure structure in the excavation of deep foundation pits in the subway, taking the Yucun South Road Station of the first phase project of Shijiazhuang Rail Transit Line 4 as an example to explore the application of the “soil nailing + spray concrete” enclosure form. In order to solve the problems of low efficiency and long construction period of deep excavation pits in subway stations, this enclosure form significantly saves the length of enclosure piles and the number of steel supports. Composite soil nail support not only retains the function of soil nail walls, but also solves the problems of water isolation and self-reliance of soil, ensuring the safety, quality and progress of foundation pit excavation construction, and achieving good economic benefits. This study can provide a reference for similar projects.