STUDY ON RECTIFICATION RESPONSE AND JACKING FORCE CALCULATION FOR PILE-TYPE ADJUSTABLE WIND TURBINE FOUNDATIONS

Wei Huanwei; Lei Shuli; Liu Cong; Tan Fang

doi:10.19912/j.0254-0096.tynxb.2024-0614

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Acta Energiae Solaris Sinica ›› 2025, Vol. 46 ›› Issue (8) : 85-95. DOI: 10.19912/j.0254-0096.tynxb.2024-0614

STUDY ON RECTIFICATION RESPONSE AND JACKING FORCE CALCULATION FOR PILE-TYPE ADJUSTABLE WIND TURBINE FOUNDATIONS

Wei Huanwei^1,2, Lei Shuli¹, Liu Cong^1,2, Tan Fang^1,2

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Abstract

To study the rectification response of the foundation of the pile-type adjustable wind turbine during the jacking process and the calculation method of the jacking force, a comprehensive research method combining indoor model tests and numerical simulations was adopted to explore the responses of the reaction piles and the surrounding soil during the jacking process, and to conduct factor analysis on the correction jacking force. This approach aims to delve into the complex interaction between the reaction pile and the surrounding soil during jacking process, while also conducting a thorough factor analysis of the jacking force. Based on the principle of energy conservation, a method for calculating the jacking force tailored to this type of foundation is proposed. The reliability and effectiveness of this method are subsequently verified through numerical simulations and laboratory model tests. The findings reveal that upon application of a jacking force, the compression surface located on the non-rectification side of the foundation continuously decreases. Furthermore, the rectification neutral axis of the foundation shifts towards the non-rectification side, resulting in the settlement of each pile change. It is noteworthy that factors such as soil gravity, cohesion, and upper load exert insignificant influencing on the scope of jacking impact, but they demonstrate a linear correlation with the jacking force. Conversely, the internal friction angle of the soil and the embedded depth of pile significantly influence the shear range of soil, resulting in nonlinear variations in the jacking force. Specifically, a negative correlation is observed between the jacking force and the internal friction angle, whereas a positive correlation is evident with the embedded depth. The proposed method for calculating the jacking force aligns well with the results obtained from both model testing and numerical simulations.

Key words

wind turbines / factor analysis / energy conservation / rectification / laboratory model tests

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Wei Huanwei, Lei Shuli, Liu Cong, Tan Fang. STUDY ON RECTIFICATION RESPONSE AND JACKING FORCE CALCULATION FOR PILE-TYPE ADJUSTABLE WIND TURBINE FOUNDATIONS[J]. Acta Energiae Solaris Sinica. 2025, 46(8): 85-95 https://doi.org/10.19912/j.0254-0096.tynxb.2024-0614

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