水平循环荷载作用下沉降可调式风电机组基础承载特性模型试验研究

李仁杰; 卢向星; 张昴辉; 雷树立; 魏焕卫; 刘聪

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

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太阳能学报 ›› 2025, Vol. 46 ›› Issue (12) : 708-717. DOI: 10.19912/j.0254-0096.tynxb.2024-1337

水平循环荷载作用下沉降可调式风电机组基础承载特性模型试验研究

李仁杰¹, 卢向星¹, 张昴辉^2~4, 雷树立^2~4, 魏焕卫^2~4, 刘聪^2~4

作者信息 +

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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文章历史 +

摘要

沉降可调式基础是一种适用于深厚排土场地层的新型主动沉降调控式风电机组基础形式,为探究该新型基础结构在水平荷载作用下的承载特性,采用模型试验方法,探究水平单调和循环荷载作用下传统重力式风电机组基础和沉降可调式风电机组基础在运行期间各构件受力响应以及变形规律的差异性。试验结果表明：水平单调加载条件下,沉降可调式基础极限承载力优于传统重力式基础,约提高160%;水平等幅短期循环加载条件下,风电机组基础转角改变量与循环荷载幅值呈正相关,相同荷载幅值下沉降可调式基础转角变化量明显小于重力式基础;水平变幅长期循环加载条件下,沉降可调式基础的转角、累积位移及土压力变化量小于重力式基础。沉降可调式基础在加载过程中桩身轴力不断增大,但增长速率逐渐变缓,轴力增量随着桩身深度的增加而逐渐减小。

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.

导出引用

李仁杰, 卢向星, 张昴辉, 雷树立, 魏焕卫, 刘聪. 水平循环荷载作用下沉降可调式风电机组基础承载特性模型试验研究[J]. 太阳能学报. 2025, 46(12): 708-717 https://doi.org/10.19912/j.0254-0096.tynxb.2024-1337

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

中图分类号： TU476.1

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