单侧冲刷对海上风电筒型基础稳定性影响研究

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,...

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

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.