海上风机单桩基础冲刷防护试验研究  

Experimental study on scour protection for wind turbine monopile foundations

作　　者：蒋玲智 高洋洋 JIANG Lingzhi;GAO Yangyang(Ocean College,Zhejiang University,Zhoushan 316021,Zhejiang,China;Hainan Institute of Zhejiang University,Sanya 572025,Hainan,China)

机构地区：[1]浙江大学海洋学院,浙江舟山316021 [2]浙江大学海南研究院,海南三亚572025

出　　处：《地基处理》2025年第2期116-126,共11页Journal of Ground Improvement

基　　金：国家自然科学基金项目(52371291,52238008)。

摘　　要：本文开展了极端波流条件下的单桩冲刷以及防护研究,研究纯流和波流组合作用下的局部冲刷发展速度和最终平衡冲刷深度。基于冲刷结果开展防护研究,防护包括抛石防护、抛石−土工布组合防护、抛石−护圈组合防护。研究结果表明:无防护时,在极端流和波流组合作用下,桩基础周围的最大冲刷深度分别为1.160D和0.653D(D为桩径),纯流条件下的冲刷发展速度小于波流组合作用;对于防护而言,抛石防护、抛石与土工布组合防护的防护效果随抛石厚度的增大而增强。本实验中,厚度为3D_(50)(D_(50)为抛石中值粒径)的抛石与护圈组合防护的防护效果最好,其防护效果在纯流和波流组合作用下分别为91.47%和81.01%。研究成果可为海上风电工程的不同冲刷防护措施设计提供技术参考。This study conducted experimental research on monopile scour and its protection under extreme wave and current conditions.It investigates the scour development and the final equilibrium scour depth under both pure current and combined wave-current actions.The protective measures considered riprap protection,combined riprap-geotextile protection and combined riprap-collar protection.The results show that without protection,the maximum scour depths around the pile foundation under extreme current and combined wave-current conditions are 1.160D and 0.653D(D is the pile diameter),respectively,with the scouring development under pure current being slower than that under combined wave-current action.Regarding protection,the effectiveness of riprap protection and combined riprap-geotextile protection increases with increasing thickness of the riprap.In this experiment,the combined riprap-3D collar protection,with riprap thickness of 3D_(50),showed the best performance,achieving protection efficiencies of 91.47%under pure current and 81.01%under combined wave-current conditions.The research results can provide technical reference for the design of different scour protection measures for offshore wind power projects.

关 键 词：风机单桩 纯流作用 波流组合 抛石防护 组合防护 平衡冲刷深度 

分 类 号：P752[天文地球—海洋科学]