Discrete element study of method for installation forces of screw piles in sand under different advancement ratios

WANG Le; LI Yu; XU Zhijun; LIU Bo; ZHANG Chunhui; TIAN Yinghui

doi:10.11779/CJGE20230204

Volume 46 Issue 6

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Chinese Journal of Geotechnical Engineering > 2024 > 46(6): 1166-1176. > DOI: 10.11779/CJGE20230204

WANG Le, LI Yu, XU Zhijun, LIU Bo, ZHANG Chunhui, TIAN Yinghui. Discrete element study of method for installation forces of screw piles in sand under different advancement ratios[J]. Chinese Journal of Geotechnical Engineering, 2024, 46(6): 1166-1176. DOI: 10.11779/CJGE20230204

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Discrete element study of method for installation forces of screw piles in sand under different advancement ratios

WANG Le^1,,
LI Yu¹,
XU Zhijun²,
LIU Bo^3, ,,
ZHANG Chunhui^{4, 5},
TIAN Yinghui⁶

1.
State Key Laboratory of Hydraulic Engineering Simulation and Safety, Tianjin University, Tianjin 300350, China
2.
School of Civil Engineering, Henan University of Technology, Zhengzhou 450001, China
3.
Department of Civil and Environmental Engineering, Hong Kong Polytechnic University, Hong Kong 999077, China
4.
School of Civil Engineering, Hebei University of Science and Technology, Shijiazhuang 050018, China
5.
Hebei Technological Innovation Center of Disaster Prevention and Mitigation Engineering of Geotechnical and Structural System, Shijiazhuang 050018, China
6.
Department of Infrastructure Engineering, The University of Melbourne, Victoria 3010, Australia

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Received Date: March 08, 2023
Available Online: June 04, 2024

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Abstract

Abstract

The installation of a screw pile, as a potential offshore wind power foundation form, is the key to its successful application in offshore wind power engineering. Based on the discrete element method, the installation forces of the screw pile installed under different advancement ratios in sand and the interaction between the screw pile and the surrounding soil are simulated with PFC^3D. On the macro-level, the effects of the installation advancement ratio on the installation forces acting on the shaft, base and upper and lower surfaces of the helix of the screw pile are studied. Microscopically, the changes in porosity, coordination number and stresses in the surrounding soil during the installation of the screw pile are analyzed. The research shows that with the reduction of the advancement ratio, both the vertical force and the torque acting on the screw pile decrease, and the disturbance caused by installation of the screw pile to the surrounding soil also reduces. The mechanisms of installation of the screw pile are different for advancement ratios equal to or below 1. The research results provide some insights into the conditions required for the installation of screw piles under different advancement ratios.
- screw pile,
- advancement ratio,
- sand,
- discrete element method

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References (29)

References

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