STUDY ON HORIZONTAL BEARING CAPACITY OF MARINE STEEL PIPE PILE FOUNDATIONS BASED ON SEABED DISPLACEMENT STANDARDS

Liang Chao; Sun Liangwei; Liu Run; Wang Le

doi:10.19912/j.0254-0096.tynxb.2024-2255

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Acta Energiae Solaris Sinica ›› 2026, Vol. 47 ›› Issue (4) : 397-404. DOI: 10.19912/j.0254-0096.tynxb.2024-2255

STUDY ON HORIZONTAL BEARING CAPACITY OF MARINE STEEL PIPE PILE FOUNDATIONS BASED ON SEABED DISPLACEMENT STANDARDS

Liang Chao, Sun Liangwei, Liu Run, Wang Le

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Abstract

As a common foundation type for offshore wind turbines, the pile-soil interaction mechanism of large-diameter marine steel pipe pile foundations is significantly different from that of traditional small-diameter piles. The commonly used API specifications are unable to accurately assess the load-bearing performance of large-diameter marine steel pipe pile foundations. This study employs numerical analysis methods to investigate the influence of different pile-soil stiffness ratios in sandy soils on the horizontal load-bearing characteristics of large-diameter single piles. It reveals the influence laws of pile-soil stiffness ratios and displacement selection conditions on the horizontal load-bearing capacity of single piles. The results indicate that, as the pile-soil stiffness ratio increases, the horizontal load-bearing capacity of single piles tends to decrease. Moreover, with the increase in pile diameter, the sensitivity of the horizontal load-bearing capacity to the pile-soil stiffness ratio weakens. The horizontal load-bearing capacity of single piles exhibits a logarithmic relationship with the pile-soil stiffness ratio under different seabed displacements. Based on the influence of horizontal load-bearing mechanisms, displacement conditions, and soil strength on the horizontal load-bearing capacity, a normalized horizontal load-bearing capacity calculation method for large-diameter single piles is established.

Key words

offshore wind power / large-diameter single pile / horizontal bearing capacity / pile-soil stiffness ratio / horizontal loading response

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Liang Chao, Sun Liangwei, Liu Run, Wang Le. STUDY ON HORIZONTAL BEARING CAPACITY OF MARINE STEEL PIPE PILE FOUNDATIONS BASED ON SEABED DISPLACEMENT STANDARDS[J]. Acta Energiae Solaris Sinica. 2026, 47(4): 397-404 https://doi.org/10.19912/j.0254-0096.tynxb.2024-2255

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