波流共同作用下桩基局部冲刷范围与方量计算方法研究

潘晓春; 顾晓庆; 任治军; 束加庆; 王晓惠

doi:10.19912/j.0254-0096.tynxb.2024-1987

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太阳能学报 ›› 2026, Vol. 47 ›› Issue (3) : 367-374. DOI: 10.19912/j.0254-0096.tynxb.2024-1987

波流共同作用下桩基局部冲刷范围与方量计算方法研究

潘晓春, 顾晓庆, 任治军, 束加庆, 王晓惠

作者信息 +

RESEARCH ON CALCULATION METHOD FOR LOCAL SCOUR RANGE AND VOLUME AROUND PILE FOUNDATIONS UNDER COMBINED ACTION OF WAVES AND CURRENT

Pan Xiaochun, Gu Xiaoqing, Ren Zhijun, Shu Jiaqing, Wang Xiaohui

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文章历史 +

摘要

为合理确定冲刷防护措施及工程量,需准确预估桩基局部冲刷范围与方量。该文在对泥沙颗粒内摩擦角、水下休止角和冲刷坑边坡角等概念辨析的基础上,采用江苏盐城某海上风电场240组、广东湛江某海上风电场96组无防护措施下的桩基冲刷监测有效数据,将局部冲刷坑概化为环形圆椎体,统计分析了局部冲刷坑边坡角与冲刷深度的经验关系,提出波流共同作用下桩基局部冲刷方量与范围的计算新方法。采用预留的60组冲刷监测数据的检验表明,按现行规范中的基于内摩擦角的公式计算的桩基局部冲刷范围及方量明显偏小,而按该文方法计算的冲刷方量与实测方量整体上相当接近。桩基局部冲刷坑位于床面以下,坡面泥沙颗粒不必处于临界起动状态,边坡角小于水下休止角与内摩擦角,现行规范中的局部冲刷范围计算公式应据此予以修正。该文方法为采取有针对性的冲刷防护措施,以及研制可靠的冲刷防护装置提供了依据,但今后仍需继续积累海上桩基局部冲刷监测数据,以不断提高冲刷方量与范围的计算精度。

Abstract

In order to reasonably determine the scour protection measures and engineering quantities, it is necessary to accurately estimate the local scour range and volume of the pile foundations. Based on the analysis of concepts such as internal friction angle of sediment particles, underwater angle of repose, and slope angle of scour pits, this article uses effective data from 240 sets of unprotected pile foundation scour monitoring at an offshore wind farm in Yancheng, Jiangsu and 96 sets at an offshore wind farm in Zhanjiang, Guangdong. Local scour pits are generalized as annular circular cones, and the empirical relationship between local scour pit slope angle and scour depth is statistically analyzed. A new method for calculating the local scour volume and range of pile foundations under the combined action of waves and current is proposed. The verification using the reserved 60 sets of scour monitoring data showed that the local scour range and volume of the pile foundation calculated according to the formula based on internal friction angle in the current specifications were significantly smaller, while the scour volume calculated by the method in this paper was quite close to the measured volume as a whole. The local scour pit of the pile foundation is located below the bed surface, and the sediment particles on the slope do not need to be in a critical incipient-motion. The slope angle is smaller than the underwater angle of repose and internal friction angle. The calculation formula for local scour range in current standards should be revised accordingly. This method provides a basis for adopting targeted scour protection measures and developing reliable scour protection devices. However, in the future, it is still necessary to continue accumulating local scour monitoring data of offshore pile foundations to continuously improve the calculation accuracy of scour volume and range.

导出引用

潘晓春, 顾晓庆, 任治军, 束加庆, 王晓惠. 波流共同作用下桩基局部冲刷范围与方量计算方法研究[J]. 太阳能学报. 2026, 47(3): 367-374 https://doi.org/10.19912/j.0254-0096.tynxb.2024-1987

Pan Xiaochun, Gu Xiaoqing, Ren Zhijun, Shu Jiaqing, Wang Xiaohui. RESEARCH ON CALCULATION METHOD FOR LOCAL SCOUR RANGE AND VOLUME AROUND PILE FOUNDATIONS UNDER COMBINED ACTION OF WAVES AND CURRENT[J]. Acta Energiae Solaris Sinica. 2026, 47(3): 367-374 https://doi.org/10.19912/j.0254-0096.tynxb.2024-1987

中图分类号： P751

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