阳江沙扒海上风电三桶吸力桩防冲刷试验研究  

Study on Scour Prevention Test of Three-Bucket Suction Piles for Offshore Wind Farms in Shapa,Yangjiang

作　　者：刘博 马兆荣 刘晓建 郭辉群 LIU Bo;MA Zhaorong;LIU Xiaojian;GUO Huiqun(China Energy Engineering Group Guangdong Electric Power Design Institute Co.,Ltd.,Guangzhou 510663,China;Pearl River Water Resources Research Institute,Pearl River Water Resources Commission of the Ministry of Water Resources,Guangzhou 510610,China)

机构地区：[1]中国能源建设集团广东省电力设计研究院有限公司,广东广州510663 [2]珠江水利委员会珠江水利科学研究院,广东广州510610

出　　处：《人民珠江》2023年第7期55-63,共9页Pearl River

基　　金：广东省级促进经济高质量发展海洋专项(GDNRC〔2021〕41);广东省基础与应用基础研究基金(2021A1515110428);广州市基础与应用基础研究项目(202102021286);水沙科学与水灾害防治湖南省重点实验室开放基金(2020SS02);海岸灾害及防护教育部重点实验室(河海大学)开放基金(202209)。

摘　　要：通过建立正态物理模型,研究了阳江沙扒海上风电场三桶吸力桩近区海床防冲刷情况。针对吸力桶基础冲刷问题,提出了抛石、沙袋、仿生草等防护措施。结果表明:未实施防护方案时50年一遇桩周最大冲刷深度为2.34 m;实施防护方案后桶周冲刷深度显著降低,其中规则布置沙袋时冲深减小44%,随机布置沙袋时冲深减小32%,抛石防护时冲深减少达74%,而仿生草措施不仅减少了桩周冲刷深度,也促进了附近悬沙落淤,桶周冲深较防护前减小约90%以上。By establishing a normal physical model,the scour prevention of the seabed near three-bucket suction piles for offshore wind farms in Shapa,Yangjiang was studied.In view of the scour problem of the suction bucket foundation,protective measures such as riprap,sandbags,and bionic grass were put forward.The results show that when no protection scheme is implemented,the maximum scour depth around the pile in 50 years is 2.34 m;when the protection scheme is implemented,the scour depth around the bucket is significantly reduced and dropped by 44%when sandbags are regularly arranged.The scour depth is reduced by 32%when sandbags are randomly arranged and by 74%when riprap protection is adopted.In addition,the bionic grass not only reduces the scour depth around the pile but also promotes the suspended sand siltation nearby,and the scour depth around the bucket is reduced by about 90%compared with that before protection.

关 键 词：海上风电场 三桶吸力桩 波流作用 冲刷防护 

分 类 号：P752[天文地球—海洋科学]