EXPERIMENTAL STUDY ON BEARING CAPACITY OF SECANT PILED-BUCKET FOUNDATION FOR ONSHORE WIND TURBINE

Wang Haijun; Wu Mengdi; Guo Yaohua; Yi Likun; Xu Ying

doi:10.19912/j.0254-0096.tynxb.2024-1811

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Acta Energiae Solaris Sinica ›› 2026, Vol. 47 ›› Issue (2) : 539-545. DOI: 10.19912/j.0254-0096.tynxb.2024-1811

EXPERIMENTAL STUDY ON BEARING CAPACITY OF SECANT PILED-BUCKET FOUNDATION FOR ONSHORE WIND TURBINE

Wang Haijun^1,2, Wu Mengdi^1,2, Guo Yaohua^1,2, Yi Likun³, Xu Ying^1,2

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Abstract

Based on an actual engineering prototype, a 1∶40 secant piled bucket foundation model was designed, and indoor model tests were conducted in homogeneous sand. The bearing capacity of the foundation and the instability mode of the foundation were studied under horizontal bending moment load and vertical load. Finite element modeling and analysis of the same size scaled model were compared. The results showed that： 1） under the action of horizontal bending moment load, the bite pile skirt has good integrity with the internal soil, and the instability mode of the foundation is mainly characterized by large rigid body rotation and a small amount of overall horizontal sliding; The deviation between the ultimate bearing capacity results of the same size model test and finite element analysis during foundation instability is 4.9%. The soil pressure on the rear wall of the cylinder gradually increases, while the soil pressure on the front wall of the cylinder first increases and then decreases. The soil pressure is relatively high at about one-third of the burial depth, indicating that the foundation has undergone translational and rotational movements. 2） Under the action of vertical load, the skirt of the cylindrical foundation and the bearing platform drive the internal soil to deform together, and the foundation mainly undergoes overall shear failure. The deviation between the ultimate bearing capacity results of the test and finite element analysis during foundation instability is 6.05%, and the soil pressure on the cylinder side first decreases and then increases.

Key words

onshore wind power / secant piled bucket foundation / bearing capacity / model experiments / finite element simulation

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Wang Haijun, Wu Mengdi, Guo Yaohua, Yi Likun, Xu Ying. EXPERIMENTAL STUDY ON BEARING CAPACITY OF SECANT PILED-BUCKET FOUNDATION FOR ONSHORE WIND TURBINE[J]. Acta Energiae Solaris Sinica. 2026, 47(2): 539-545 https://doi.org/10.19912/j.0254-0096.tynxb.2024-1811

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