STUDY OF p-y CURVES OF SUCTION PILE DRUM FOUNDATIONS FOR OFFSHORE WIND TURBINES IN SANDY SOILS

Jiang Jianping; Wang Luya

doi:10.19912/j.0254-0096.tynxb.2024-0712

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Acta Energiae Solaris Sinica ›› 2025, Vol. 46 ›› Issue (9) : 26-33. DOI: 10.19912/j.0254-0096.tynxb.2024-0712

STUDY OF p-y CURVES OF SUCTION PILE DRUM FOUNDATIONS FOR OFFSHORE WIND TURBINES IN SANDY SOILS

Jiang Jianping, Wang Luya

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Abstract

Offshore wind turbine suction pile foundation has been widely used. As known as suction bucket foundations, they are large concrete or steel barrel structures, closed at the top, open at the bottom, and equipped with a pumping/drainage port at the top. Firstly, the validity of the model is verified by the finite element software ABAQUS based on the data of actual test piles; then the finite element model of suction pile barrel foundation with pile diameter of 4-9 m in sandy soil is established to analyze the bending moments and displacement responses of the pile body under different horizontal loads; finally, on the basis of the hyperbolic p-y curve model, the initial foundation reaction modulus and ultimate soil reaction force calculation method are corrected by considering the effects of soil depth and pile diameter size, and a suitable p-y curve model is proposed. The results show that the suction pile barrel foundation in sandy soil mainly shows rotation mode under horizontal load, and accompanied by a little bit of translation, the value of the pile bending moment increases and then decreases along the soil depth direction, and the change of the horizontal load size basically has no effect on the location of the maximum value of the pile bending moment, the API method p-y curve overestimates the initial foundation reaction modulus and underestimates the ultimate soil reaction force, which is not suitable for its calculation and analysis, while the agreement between the modified p-y curve model and the results of the numerical modeling is better.

Key words

offshore wind turbines / pile foundations / ABAQUS / sand / p-y curve / pile-soil interaction

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Jiang Jianping, Wang Luya. STUDY OF p-y CURVES OF SUCTION PILE DRUM FOUNDATIONS FOR OFFSHORE WIND TURBINES IN SANDY SOILS[J]. Acta Energiae Solaris Sinica. 2025, 46(9): 26-33 https://doi.org/10.19912/j.0254-0096.tynxb.2024-0712

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