Volume 39 Issue 5
Oct.  2025
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Ye Wei, Tang Bin, Cheng Yichong, An Ran, Wu Caide, Gong Dikuai. Design of large ring support system in soft soil area of Ningbo[J]. GEOTECHNICAL ENGINEERING TECHNIQUE, 2025, 39(5): 674-679. doi: 10.20265/j.cnki.issn.1007-2993.2024-0170
Citation: Ye Wei, Tang Bin, Cheng Yichong, An Ran, Wu Caide, Gong Dikuai. Design of large ring support system in soft soil area of Ningbo[J]. GEOTECHNICAL ENGINEERING TECHNIQUE, 2025, 39(5): 674-679. doi: 10.20265/j.cnki.issn.1007-2993.2024-0170
shu

Design of large ring support system in soft soil area of Ningbo

doi: 10.20265/j.cnki.issn.1007-2993.2024-0170

  • Zhejiang Huazhan Research and Design Institute Co., Ltd., Ningbo 315012, Zhejiang, China

  • Received Date: 2024-04-17
  • Accepted Date: 2024-10-29
  • Rev Recd Date: 2024-09-02
  • Publish Date: 2025-10-10
    Abstract
  • The design of the support system of the deep foundation pit in the soft soil area is directly related to the safety and efficiency of the project. In the design of a deep and large foundation pit support in the soft soil area of Ningbo, the horizontal support adopts a super-large circular concrete support with a diameter of 180 m, and the vertical support uses the static drilling rooted pile as the column pile, which realizes the prefabrication of the factory. Compared with the conventional foundation pit support system, the innovative support system can reduce the support coverage area by up to 20%, and greatly reduce the impact of the support on the construction operation under the premise of ensuring the safety of the foundation pit. The application of special column pile greatly reduces the project cost. The comparative analysis of the numerical simulation results and the engineering measurement results shows that the three-dimensional finite element method can reasonably predict the deformation of the super-large diameter annular brace foundation pit, and the super-large diameter annular brace can meet the deformation control requirements of deep and large foundation pits in soft soil areas.

     

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