MODEL EXPERIMENTAL STUDY ON BEARING CHARACTERISTICS OF SETTLEMENT-ADJUSTABLE WIND TURBINE FOUNDATION UNDER HORIZONTAL CYCLIC LOADS

Li Renjie; Lu Xiangxing; Zhang Maohui; Lei Shuli; Wei Huanwei; Liu Cong

doi:10.19912/j.0254-0096.tynxb.2024-1337

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Acta Energiae Solaris Sinica ›› 2025, Vol. 46 ›› Issue (12) : 708-717. DOI: 10.19912/j.0254-0096.tynxb.2024-1337

MODEL EXPERIMENTAL STUDY ON BEARING CHARACTERISTICS OF SETTLEMENT-ADJUSTABLE WIND TURBINE FOUNDATION UNDER HORIZONTAL CYCLIC LOADS

Li Renjie¹, Lu Xiangxing¹, Zhang Maohui^2~4, Lei Shuli^2~4, Wei Huanwei^2~4, Liu Cong^2~4

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Abstract

The settlement-adjustable wind turbine foundation is a new form of active settlement-regulated wind turbine foundation suitable for deep dump ground layer. The model test method was used to investigate the differences in the force response and deformation patterns of the various components of the traditional gravity wind turbine foundation and the settlement-adjustable wind turbine foundation during operation under horizontal cyclic loading. The test results show that： under horizontal monotonic loading conditions, the ultimate bearing capacity of the settlement-adjustable foundation is better than that of the traditional gravity foundation, with an increase of about 160%; under horizontal equal-amplitude short-term cyclic loading conditions, the amount of change in the inclination of the foundation of the same foundation form and the size of the amplitude of the cycle load are positively correlated, and the amount of change in the inclination of the settlement-adjustable foundation of the same amplitude of the load is obviously smaller than that of the gravity foundation; under horizontal variable-amplitude long-term cyclic loading conditions, the amount of change in the inclination of the settlement-adjustable foundation is significantly smaller than that of the gravity foundation. Under the condition of horizontal amplitude long-term cyclic loading, the amount of change of inclination, displacement and soil pressure of settlement-adjustable wind turbine foundation keeps obviously smaller than that of gravity-type foundation. The axial force of settlement-adjustable wind turbine foundation keeps increasing during the loading process, but the growth rate is gradually slowing down, and the increment of axial force decreases with the increase of monitoring depth of the pile body.

Key words

settlement-adjustable foundation / spoil disposal site / horizontal cyclic loading / model test / bearing characteristics / foundation cumulative rotation angle

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Li Renjie, Lu Xiangxing, Zhang Maohui, Lei Shuli, Wei Huanwei, Liu Cong. MODEL EXPERIMENTAL STUDY ON BEARING CHARACTERISTICS OF SETTLEMENT-ADJUSTABLE WIND TURBINE FOUNDATION UNDER HORIZONTAL CYCLIC LOADS[J]. Acta Energiae Solaris Sinica. 2025, 46(12): 708-717 https://doi.org/10.19912/j.0254-0096.tynxb.2024-1337

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