基于非接触式加载的海上风机桩土相互作用模型试验  

Model test of pile-soil interaction for offshore wind turbine based on non-contact loading

作　　者：于思冬 朱熊彪 Yu Sidong;Zhu Xiongbiao(College of Civil Engineering,Zhejiang University of Technology,Hangzhou 310000,China;China Construction Third Bureau Group East China Construction Co.,Shanghai 200000,China)

机构地区：[1]浙江工业大学土木工程学院,浙江杭州310000 [2]中建三局华东公司,上海200000

出　　处：《吉林水利》2025年第2期12-17,共6页Jilin Water Resources

摘　　要：海上风机桩周土在水平荷载下的变形特性是单桩水平承载特性的重要体现,考虑到现有接触式加载的误差和精度问题,提出了一套单桩非接触式电磁加载装置与方法。本文依托江苏某海上风机项目,根据相似定律开展缩尺模型试验,利用PIV技术对桩周土位移进行观测,并将其结果与接触式加载进行对比。试验结果表明,距离桩身40mm以内,随着深度的不断增加,桩周土位移呈现先减小后稳定的趋势,而40 mm以外基本不发生位移,非接触式电磁加载下桩顶位移与接触式砝码加载结果变化趋势一致,证明了电磁非接触式加载方法的有效性。The deformation characteristics of soil around offshore wind turbine piles under horizontal loads are an important reflection of the horizontal bearing capacity of single pile.Considering the inherent loading errors and precision issues of conventional contact loading methods,a non-contact electromagnetic loading device and method for single pile is proposed.Relying on an offshore wind turbine project in Jiangsu,a scaled model test was conducted based on similarity laws.PIV technology was used to observe soil displacement around the pile.The results were compared with those from contact loading.The test results indicate that within 40 mm from the pile,the horizontal displacement of the surrounding soil decreases with depth and then stabilizes,while beyond 40 mm,displacement is negligible.The displacement trends at the pile top under non-contact electromagnetic loading were consistent with those from contact weight loading,effectively demonstrating the validity of the electromagnetic non-contact loading method.

关 键 词：桩土作用 非接触式加载 PIV技术 

分 类 号：TU473[建筑科学—结构工程]