摘要
复杂的海洋环境下海上风电单桩基础周围会出现局部冲刷现象,因此研究冲刷条件下单桩基础的承载特性具有重要的工程意义。采用现场勘测和数值模拟相结合的研究方法,开展江苏辐射沙洲海域局部冲刷条件下某单桩基础水平承载特性研究,得到以下主要结论:①多波束测深系统勘测显示,典型6 MW单桩基础桩周最大冲刷深度达8.6 m;②ABAQUS数值分析显示,冲刷坑导致单桩基础水平承载力下降约18.2%;③桩身挠度曲线在距离冲刷26.7 m处出现了明显的拐点,导致p-y曲线特征参数发生显著变化。上述研究结果表明,该海域海上风电场冲刷现象严重,会影响单桩基础承载特性。
Under complex marine environment,there will be local scour around the offshore wind power monopile foundation.Therefore,it is of great engineering significance to study the bearing characteristics of monopile foundation under scour condition.Combining on-site survey and numerical simulation methods,the research on the horizontal bearing characteristics of monopile foundation under local scour conditions in Jiangsu radiation sandbar sea area is carried out,and the following main conclusions are obtained:(a)the multi-beam sounding system survey shows that the maximum scour depth around the pile of a typical 6 MW monopile foundation is 8.6 m;(b)ABAQUS numerical analysis shows that the scour pit causes the horizontal bearing capacity of monopile foundation to drop by about 18.2%;and(c)the deflection curve of pile body has an obvious inflection point at a distance of 26.7 m from the scour pit,resulting in a significant change in the characteristic parameters of p-y curve.The above research results show that the scouring phenomenon of offshore wind farms in this sea area is serious,which will affect the bearing characteristics of monopile foundations.
作者
许海波
卿启忠
詹懿德
胡忠平
郑莉
XU Haibo;QING Qizhong;ZHAN Yide;HU Zhongping;ZHENG Li(PowerChina Huadong Engineering Corporation Limited,Hangzhou 311122,Zhejiang,China;Zhejiang East China Engineering Consulting Co.,Ltd.,Hangzhou 311122,Zhejiang,China;China Railway Construction Port and Navigation Bureau Group Co.,Ltd.,Zhuhai 519000,Guangdong,China;Ocean College,Zhejiang University,Zhoushan 316021,Zhejiang,China)
出处
《水力发电》
CAS
2023年第6期88-91,98,共5页
Water Power
基金
浙江省联合基金重点项目(LHZ22E090002)
中国电建集团华东勘测设计研究院有限公司科技项目(KY2021-ZX-03)。
