[1] DING Hongyan, HAN Tianqi, ZHANG Puyang, LUO Jianhua, et al. Influence of helical blades on the horizontal bearing capacity of spiral piles for offshore wind power [J]. Journal of Southeast University (English Edition), 2025, 41 (3): 314-324. [doi:10.3969/j.issn.1003-7985.2025.03.007]
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Influence of helical blades on the horizontal bearing capacity of spiral piles for offshore wind power(
)
螺旋叶片对海上风电螺旋桩水平承载力的影响
)Journal of Southeast University (English Edition)[ISSN:1003-7985/CN:32-1325/N]
- Volumn:
- 41
- Issue:
- 2025 3
- Page:
- 314-324
- Research Field:
- Civil Engineering
- Publishing date:
- 2025-09-11
Info
- Title:
- Influence of helical blades on the horizontal bearing capacity of spiral piles for offshore wind power
- 螺旋叶片对海上风电螺旋桩水平承载力的影响
- Author(s):
- DING Hongyan, HAN Tianqi, ZHANG Puyang, LUO Jianhua, LE Conghuan
- State Key Laboratory of Hydraulic Engineering Intelligent Construction and Operation, Tianjin University, Tianjin 300072, China
- Keywords:
- offshore wind power; spiral pile; helical blade; bearing capacity
- PACS:
- TU473.1
- DOI:
- 10.3969/j.issn.1003-7985.2025.03.007
- Abstract:
- Spiral pile foundations, as a promising type of foundation, are of significant importance for the development of offshore wind energy, particularly as it moves toward deeper waters. This study conducted a physical experiment on a three-spiral-pile jacket foundation under deep-buried sandy soil conditions. During the experiment, horizontal displacement was applied to the structure to thoroughly investigate the bearing characteristics of the three-spiral-pile jacket foundation. This study also focused on analyzing the bearing mechanisms of conventional piles compared with spiral piles with different numbers of blades. Three different working conditions were set up and compared, and key data, such as the horizontal bearing capacity, pile shaft axial force, and spiral blade soil pressure, were measured and analyzed. The results show the distinct impacts of the spiral blades on the compressed and tensioned sides of the foundation. Specifically, on the compressed side, the spiral blades effectively enhance the restraint of the soil on the pile foundation, whereas on the tensioned side, an excessive number of spiral blades can negatively affect the structural tensile performance to some extent. This study also emphasizes that the addition of blades to the side of a single pile is the most effective method for increasing the bearing capacity of the foundation. This research aims to provide design insights into improving the bearing capacity of the foundation.
- 螺旋桩基础作为一种有前途的基础形式，研究其承载特性对海上风电向着深远海发展具有重要意义。本文开展了三螺旋桩导管架基础在深埋砂土条件下的物理实验。实验过程中，通过对结构施加水平位移，研究三螺旋桩导管架基础的承载特性，分析普通桩与不同叶片数目螺旋桩的承载机制。设置了3种不同工况，对结构的水平承载力、桩轴力以及螺旋叶片土压力等关键数据进行测量与对比分析，揭示了螺旋叶片对基础受压侧和受拉侧产生的不同影响。研究结果表明，在受压侧，螺旋叶片可以有效增加土体对桩基的约束，而在受拉侧，过多的螺旋叶片在一定程度上会影响结构的抗拉性能。同时指出在单桩侧增加叶片是提高基础承载力最有效的方法。该研究可以为提高基础承载能力提供设计思路。
References:
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Memo
- Memo:
-
Received 2024-09-29,Revised 2025-02-17.
Biographies: Ding Hongyan (1963 —), male, doctor, professor; Zhang Puyang (corresponding author), male, doctor, professor, zpy_td@163.com.
Foundation item:The National Natural Science Foundation of China (No. 52171274).
Citation:DING Hongyan,HAN Tianqi,ZHANG Puyang,et al.Influence of helical blades on the horizontal bearing capacity of spiral piles for offshore wind power[J].Journal of Southeast University (English Edition),2025,41(3):314-324.DOI:10.3969/j.issn.1003-7985.2025.03.007.DOI:10.3969/j.issn.1003-7985.2025.03.007