[1] Zhang Puyang, Xiong Lichao, Le Conghuan, Dong Hongji, et al. Comparison analysis of the bearing capacity of rock-socketed piles and sand piles for offshore wind turbines [J]. Journal of Southeast University (English Edition), 2023, 39 (4): 384-392. [doi:10.3969/j.issn.1003-7985.2023.04.007]

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Comparison analysis of the bearing capacity of rock-socketed piles and sand piles for offshore wind turbines()

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Journal of Southeast University (English Edition)[ISSN:1003-7985/CN:32-1325/N]

Volumn:

39

Issue:

2023 4

Page:

384-392

Research Field:

Civil Engineering

Publishing date:

2023-12-20

Info

Title:

Comparison analysis of the bearing capacity of rock-socketed piles and sand piles for offshore wind turbines

Author(s):

Zhang Puyang;  Xiong Lichao;  Le Conghuan;  Dong Hongji;  Ding Hongyan

State Key Laboratory of Hydraulic Engineering Simulation and Safety, Tianjin University, Tianjin 300072, China

Keywords:

offshore wind power;  rock-socketed pile(RSP);  laboratory test;  bearing capacity

PACS:

TU473

DOI:

10.3969/j.issn.1003-7985.2023.04.007

Abstract:

The bearing capacity of rock-socketed piles(RSPs)and sand piles under horizontal loads was compared and analyzed through laboratory-scale model tests. The tests were conducted using phosphogypsum to simulate the underlying rock and compacted sand as the upper layer. Particle analysis tests were conducted prior to the tests to confirm soil uniformity. Cone penetration test(CPT)was performed to evaluate the soil, confirming similar soil conditions for all experimental groups, indicating that any errors arising from soil properties could be neglected. The bearing capacity of RSPs was verified through finite element simulation, the results of which closely matched those of the tests. The results show that the bending moment distribution of RSPs and sand piles is consistent, with their maximum bending moment occurring at a depth of 2-3 times the pile diameter(5 cm). However, the location of the maximum bending moment for RSPs is about 1 pile diameter(5 cm)deeper than that of the sand piles. When the upper layer of sand is shallow, the bearing effect of RSPs is more significant, with an increase in the bearing capacity of about 41% compared to sand piles. In addition, due to the squeezing effect of the rock, the cross-sectional deformation of the RSPs is significantly lower than that of the sand piles.

References:

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Memo

Memo:

Biograph:Zhang Puyang(1978—), male, doctor, associate professor, zpy@tju.edu.cn.
Foundation item: The National Natural Science Foundation of China(No.52171274).
Citation: Zhang Puyang, Xiong Lichao, Le Conghuan, et al. Comparison analysis of the bearing capacity of rock-socketed piles and sand piles for offshore wind turbines[J].Journal of Southeast University(English Edition), 2023, 39(4):384-392.DOI:10.3969/j.issn.1003-7985.2023.04.007.

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