Volume 39 Issue 1
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Li Chuang, Wang Ruifang. Deformation control and analysis of pre-stressed fish-belly beem steel support system pit[J]. GEOTECHNICAL ENGINEERING TECHNIQUE, 2025, 39(1): 97-104. doi: 10.20265/j.cnki.issn.1007-2993.2023-0886
Citation: Li Chuang, Wang Ruifang. Deformation control and analysis of pre-stressed fish-belly beem steel support system pit[J]. GEOTECHNICAL ENGINEERING TECHNIQUE, 2025, 39(1): 97-104. doi: 10.20265/j.cnki.issn.1007-2993.2023-0886
shu

Deformation control and analysis of pre-stressed fish-belly beem steel support system pit

doi: 10.20265/j.cnki.issn.1007-2993.2023-0886

  • School of Urban Construction, Wuhan University of Science and Technology, Wuhan 430065, Hubei, China

  • Received Date: 2023-11-26
  • Accepted Date: 2024-05-09
  • Rev Recd Date: 2024-04-24
  • Publish Date: 2025-02-21
    Abstract
  • Taking a deep foundation pit in Wuhan as an example, the control effectiveness of the pre-stressed fish-bellied beam steel support system on the overall deformation was analyzed. The influence of the degree of pre-stress, the pile diameter of the enclosing piles and the spacing of the piles on the deformation of the fish-belly beam steel support system was studied. The study shows that: the lateral deformation of the steel support structure system of the fish-belly beam, the deep lateral displacement of the enclosure structure and the ground settlement outside the pit do not exceed the warning value of the pit, and the application of pre-stress can effectively control the maximum lateral displacement of the enclosure structure, and the control effect is better at the position of the fish-belly beam, and the overall safety of the construction of the pit is greatly improved. Increasing the degree of pre-stress, the diameter of the enclosing piles, and reducing the pile spacing can reduce the overall deformation of the foundation pit to a certain extent. Within a reasonable range, compared with the spacing of the enclosing piles, the change of pile diameter has a greater influence on the maximum lateral deformation of the fish-belly beam steel support system, the maximum lateral displacement of the deep layer of the enclosing structure, and the maximum settlement of the ground surface outside the pit, which has a more significant effect on the overall deformation of the foundation pit.

     

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