Volume 40 Issue 2
Apr.  2026
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WEI Renjie, YAN Liming. Application and deformation characteristics study of pile-brace-anchor support in deep and thick miscellaneous fill foundation pit[J]. GEOTECHNICAL ENGINEERING TECHNIQUE, 2026, 40(2): 231-236. doi: 10.20265/j.cnki.issn.1007-2993.2024-0541
Citation: WEI Renjie, YAN Liming. Application and deformation characteristics study of pile-brace-anchor support in deep and thick miscellaneous fill foundation pit[J]. GEOTECHNICAL ENGINEERING TECHNIQUE, 2026, 40(2): 231-236. doi: 10.20265/j.cnki.issn.1007-2993.2024-0541
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Application and deformation characteristics study of pile-brace-anchor support in deep and thick miscellaneous fill foundation pit

doi: 10.20265/j.cnki.issn.1007-2993.2024-0541

  • China Shipbuilding Industry Institute of Engineering Investigation & Design Co., Ltd., Shanghai 200063, China

  • Received Date: 2024-11-22
  • Accepted Date: 2025-04-09
  • Rev Recd Date: 2025-04-09
    • Available Online: 2026-04-09
  • Publish Date: 2026-04-09
    Abstract
  • Taking a comprehensive environmental improvement project in Jiangyin as the background, this article introduces the pile-anchor-brace support form in deep miscellaneous fill foundation pits. Based on the characteristics of miscellaneous fill and the protection requirements of surrounding buildings, corresponding construction measures were proposed. By combining PLAXIS 2D finite element simulation with theoretical calculations, the internal forces and deformation characteristics of the retaining structure, as well as the settlement patterns of the surrounding ground, were analyzed. The research results show that: (1) the overall displacement of lateral deformation of the retaining structure mainly occurs in the upper miscellaneous fill layer; (2)the surface settlement is spoon shaped, with the maximum settlement value located at about 0.5 times the excavation depth at the edge of the foundation pit; (3) there are some differences between the bending moment and shear force values simulated by finite element and the theoretical calculation values, but the overall variation pattern of the curves is basically the same, indicating that the established calculation mode and selected soil and rock parameter are all reasonable.

     

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