Stress Analysis and Optimization of Arc-Shaped Occlusal Pile Structure in Deep Foundation Pit

QIAN Ji; JIA Ruixin; LI Dong; ZHANG Li

doi:10.3724/j.gyjzG23081301

Volume 55 Issue 9

Sep. 2025

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QIAN Ji, JIA Ruixin, LI Dong, ZHANG Li. Stress Analysis and Optimization of Arc-Shaped Occlusal Pile Structure in Deep Foundation Pit[J]. INDUSTRIAL CONSTRUCTION, 2025, 55(9): 247-254. doi: 10.3724/j.gyjzG23081301

Citation:

QIAN Ji, JIA Ruixin, LI Dong, ZHANG Li. Stress Analysis and Optimization of Arc-Shaped Occlusal Pile Structure in Deep Foundation Pit[J]. INDUSTRIAL CONSTRUCTION, 2025, 55(9): 247-254. doi: 10.3724/j.gyjzG23081301

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Stress Analysis and Optimization of Arc-Shaped Occlusal Pile Structure in Deep Foundation Pit

doi: 10.3724/j.gyjzG23081301

QIAN Ji^1,2,
JIA Ruixin^{3
,
,},
LI Dong⁴,
ZHANG Li⁵

1. State Key Lab of Structural Dynamics of Bridge Engineering (China Merchants Chongqing Communications Technology Research & Design Institute Co., Ltd.,), Chongqing 400067, China;
2. School of Civil Engineering, Chongqing Jiaotong University, Chongqing 400074, China;
3. Beijing University of Technology, Beijing 100124, China;
4. Highway Research Institute, Beijing 100000, China;
5. China Railway Fourth Engineering Co., Ltd., Hefei 230000, China

Received Date: 2023-08-13
Available Online: 2025-11-05

Abstract

Abstract

Occlusal pile supporting structure has been widely applied in deep foundation pit engineering in recent years， due to its advantages of less disturbance to the surrounding foundation， higher reliability and integrity， and less environmental impact. However， when the pit depth is large and the site is limited， the linear and circular supporting structures are difficult to meet the requirements. In this paper， the arch support structure of a large arch bridge in the Minjiang River was taken as the case. Based on the calculation theory of thin shell， a theoretical calculation model of arc-shaped occlusion pile was established and compared with the three-dimensional finite element calculation results and the field measured data. At the same time， the important parameters of the structure were changed to optimize the reasonable design parameters of the supporting structure. The results showed that the horizontal displacement of the arc-shaped occlusal pile supporting structure increased gradually from the corner point to the edge center. The maximum depth of a 50 m deep foundation pit with a side length was 18.6 m， and the maximum deformation was only 10 mm， which can effectively resist the deformation of soil and water pressure. The calculated deformation of the supporting structure based on the theoretical model of the shell was in good agreement with the measured values. The diameter of the occlusal pile was 1.0 m to 1.4 m， and the addition of the pile top tie beam could greatly improve the supporting ability. The effect of the arrangement of the side， middle and outside was far better than that of the corner position. This research has certain guiding significance for the optimization of the arc occlusal pile supporting structure.
- deep foundation pit supporting structure,
- arc occlusal pile,
- shell theory,
- numerical analysis,
- optimization of structural parameters

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References(17)

References

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