RESEARCH ON EVALUATION METHOD OF COMPOSITE LOAD-BEARING PERFORMANCE OF PILE-ANCHOR FOUNDATION IN LAYERED SOILS

Li Da; Fu Dianfu; Zhang Hui; Sun Guodong; Yang Fengwei; Fu Dengfeng

doi:10.19912/j.0254-0096.tynxb.2025-0506

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Acta Energiae Solaris Sinica ›› 2026, Vol. 47 ›› Issue (8) : 627-637. DOI: 10.19912/j.0254-0096.tynxb.2025-0506

RESEARCH ON EVALUATION METHOD OF COMPOSITE LOAD-BEARING PERFORMANCE OF PILE-ANCHOR FOUNDATION IN LAYERED SOILS

Li Da¹, Fu Dianfu¹, Zhang Hui¹, Sun Guodong¹, Yang Fengwei², Fu Dengfeng²

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Abstract

Regarding the deep‐water pile anchor for the floating wind turbine, its bearing performacne and failure mechanisms in a typical single‐layer soil are investigated by finite element analysis method.Based on a site-specified geotechnical conditions of a offshore clean energy project, the failure envelope method is then systematically applied to analyze the bearing performance of pile anchor in the multi-layered soil under the combined V-H （vertical-horizontal）, V-M （vertical-moment）, and H-M （horizontal-moment） loading, resepectively. Then an approach of estimating capacities of pile anchors is developed underlying the failure envelope theory. From this study, V-H load space envelopes are applicable for assessing bearing performance if the pull-out and lateral sliding modes are dominated at failure. Furthermore, the special attention must be paid to moment load effects induced by mooring point eccentricity. Increasing positive moment loads （defined in the study） are found to significantly reduce the pull-out capacity of pile anchors and vice versa.

Key words

offshore wind power / pile foundations / bearing capacity / layered soil / numerical simulation / failure envelope

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Li Da, Fu Dianfu, Zhang Hui, Sun Guodong, Yang Fengwei, Fu Dengfeng. RESEARCH ON EVALUATION METHOD OF COMPOSITE LOAD-BEARING PERFORMANCE OF PILE-ANCHOR FOUNDATION IN LAYERED SOILS[J]. Acta Energiae Solaris Sinica. 2026, 47(8): 627-637 https://doi.org/10.19912/j.0254-0096.tynxb.2025-0506

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