单侧冲刷对海上风电筒型基础稳定性影响研究  

RESEARCH ON EFFECTS OF UNILATERAL EROSION ON STABILITY OF OFFSHORE WIND BUCKET FOUNDATION

作　　者：刘润[1] 王迎春[1] 汪嘉钰 练继建[1] 杨旭[1] Liu Run;Wang Yingchun;Wang Jiayu;Lian Jijian;Yang Xu(State Key Laboratory of Hydraulic Engineering Simulation and Safety,Tianjin University,Tianjin 300072,China)

机构地区：[1]天津大学水利工程仿真与安全国家重点实验室,天津300072

出　　处：《太阳能学报》2022年第1期73-79,共7页Acta Energiae Solaris Sinica

基　　金：国家杰出青年科学基金(51825904)。

摘　　要：海上风电筒型基础在位工作期间长期受到海流的冲刷,基础的稳定性受到一定影响。通过模型试验和数值方法研究粉土地基中,单侧冲刷工况单筒多舱筒型基础的水平向和抗倾覆极限承载力与冲刷率之间的关系,以及冲刷对基础水平向-倾覆荷载(H-M)复合承载特性的影响。研究结果表明,筒型基础的水平向和抗倾覆承载力主要由筒外前侧和筒内土体提供,随着冲刷率的增大,基础水平向及抗倾覆极限承载力逐渐降低;单侧冲刷工况下,基础的H-M包络线不关于原点中心对称,随着冲刷率的增大,包络线局部向内收缩。The stability of offshore wind bucket foundation will be affected by erosion of ocean current for a long time,during in-situ operation of the foundation.Under unilateral erosion condition,the relationship between horizontal,anti-overturning ultimate bearing capacity,as well as H-M composite bearing capacity of bucket foundation in silty soil and erosion rate is studied by means of model experiment and numerical modeling.The results show that it mainly affects the soil in front of and inside the bucket when the foundation is subjected to horizontal and overturning loads.With the increase of erosion rate,horizontal and anti-overturning ultimate bearing capacity of the foundation decrease gradually.Under unilateral erosion condition,the H-M failure envelope of the foundation is not central symmetric about the origin of coordinate system.As erosion rate increases,the failure envelope gradually shrinks locally inward.

关 键 词：海上风电 冲刷 承载力 数值模拟 筒型基础 H-M包络线 

分 类 号：TU432[建筑科学—岩土工程]