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Article

Bearing Characteristics of Helical Pile Foundations for Offshore Wind Turbines in Sandy Soil

by
Yifeng Lin
1,
Jiandong Xiao
1,*,
Conghuan Le
2,*,
Puyang Zhang
2,3,
Qingshan Chen
2 and
Hongyan Ding
2,3
1
Shanghai Investigation, Design & Research Institute Co., Ltd., Shanghai 200355, China
2
School of Civil Engineering, Tianjin University, Tianjin 300072, China
3
State Key Laboratory of Hydraulic Engineering Simulation and Safety, Tianjin University, Tianjin 300072, China
*
Authors to whom correspondence should be addressed.
J. Mar. Sci. Eng. 2022, 10(7), 889; https://doi.org/10.3390/jmse10070889
Submission received: 23 May 2022 / Revised: 19 June 2022 / Accepted: 23 June 2022 / Published: 28 June 2022
(This article belongs to the Special Issue Offshore Wind Turbine Foundations)
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Abstract

Helical pile foundations are a new foundation type for offshore wind power applications with high bearing capacity and good recovery that can be quickly and easily constructed. In this study, the finite element method was used to simulate the bearing characteristics of helical pile foundations after installation. For simulations, a blade, deeply buried in a single layer of sand, was selected. Through numerical simulations, the vertical bearing characteristics of a single helical screw pile and an ordinary pile without blades were compared, and the compression and uplift characteristics of the helical pile were revealed. In addition, the effects of pitch, blade diameter, inclination angle, number of blades, and blade spacing on the bearing characteristics of a single helical pile were analyzed. The results show that the single helical pile has the highest bearing capacity and bearing efficiency when the pitch is 0.02 times the blade buried depth, the blade diameter is 2.5 times the pile diameter, the multi-blade spacing is more than two times the blade diameter, and the number of blades is less than or equal to three. However, compared with the straight pile, the vertical bearing capacity of the single inclined helical pile did not improve significantly.
Keywords: helical pile; bearing capacity; numerical simulation helical pile; bearing capacity; numerical simulation

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MDPI and ACS Style

Lin, Y.; Xiao, J.; Le, C.; Zhang, P.; Chen, Q.; Ding, H. Bearing Characteristics of Helical Pile Foundations for Offshore Wind Turbines in Sandy Soil. J. Mar. Sci. Eng. 2022, 10, 889. https://doi.org/10.3390/jmse10070889

AMA Style

Lin Y, Xiao J, Le C, Zhang P, Chen Q, Ding H. Bearing Characteristics of Helical Pile Foundations for Offshore Wind Turbines in Sandy Soil. Journal of Marine Science and Engineering. 2022; 10(7):889. https://doi.org/10.3390/jmse10070889

Chicago/Turabian Style

Lin, Yifeng, Jiandong Xiao, Conghuan Le, Puyang Zhang, Qingshan Chen, and Hongyan Ding. 2022. "Bearing Characteristics of Helical Pile Foundations for Offshore Wind Turbines in Sandy Soil" Journal of Marine Science and Engineering 10, no. 7: 889. https://doi.org/10.3390/jmse10070889

APA Style

Lin, Y., Xiao, J., Le, C., Zhang, P., Chen, Q., & Ding, H. (2022). Bearing Characteristics of Helical Pile Foundations for Offshore Wind Turbines in Sandy Soil. Journal of Marine Science and Engineering, 10(7), 889. https://doi.org/10.3390/jmse10070889

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