砂土地基中海上风机吸力桶基础水平承载特性试验研究

寇海磊 周楠 杨丹良 冯军威 田华

寇海磊, 周楠, 杨丹良, 等.2021.砂土地基中海上风机吸力桶基础水平承载特性试验研究[J].工程地质学报, 29(6): 1752-1758. doi: 10.13544/j.cnki.jeg. 2021-0202
引用本文: 寇海磊, 周楠, 杨丹良, 等.2021.砂土地基中海上风机吸力桶基础水平承载特性试验研究[J].工程地质学报, 29(6): 1752-1758. doi: 10.13544/j.cnki.jeg. 2021-0202
Kou Hailei, Zhou Nan, Yang Danliang, et al. 2021. Study on horizontal bearing capacity of suction bucket foundation for offshore wind power in soil [J]. Joumal of Engineering Geology, 29(6): 1752-1758. doi: 10.13544/j.cnki.jeg.2021-0202
Citation: Kou Hailei, Zhou Nan, Yang Danliang, et al. 2021. Study on horizontal bearing capacity of suction bucket foundation for offshore wind power in soil [J]. Joumal of Engineering Geology, 29(6): 1752-1758. doi: 10.13544/j.cnki.jeg.2021-0202

砂土地基中海上风机吸力桶基础水平承载特性试验研究

doi: 10.13544/j.cnki.jeg.2021-0202
基金项目: 

国家自然科学基金 51879246

详细信息
    作者简介:

    寇海磊(1983-),男,博士,副教授,博士生导师,主要从事海洋岩土的教学与科研工作. E-mail: hlkou@ouc.edu.cn

    通讯作者:

    周楠(1997-),男,硕士生,主要研究方向为海洋岩土. E-mail: znmr134@163.com

  • 中图分类号: TU43

STUDY ON HORIZONTAL BEARING CAPACITY OF SUCTION BUCKET FOUNDATION FOR OFFSHORE WIND POWER IN SOIL

Funds: 

the National Natural Science Foundation of China 51879246

  • 摘要: 砂性土地基中海上风机吸力桶基础水平承载特性对海上风机稳定性至关重要。本文通过室内模型试验,对不同荷载循环比作用下砂性土地基吸力桶基础水平承载特性进行了研究。试验表明:当循环荷载比ζb=0.33时,吸力桶基础累积变形在循环过程中变化不大; 当循环荷载比ζb=1.0时,吸力桶基础累积变形随循环次数增加一直增大并且有继续增大的趋势,循环结束后,ζb=0.33及ζb=1.0的循环累积变形分别为0.006D、0.149D。在ζb=0.33及ζb=1.0的水平循环荷载作用下,50次循环结束后累积旋转角度分别为不同循环荷载比作用下第1次循环累积转角的1.43倍和1.76倍,随着循环次数增加,旋转中心的位置逐渐向上移动,最终稳定在砂面以下0.8L处左右。研究结果可为砂性土地基海上风机吸力桶基础的设计与施工提供理论依据。
  • 图  1  室内模型装置

    a. 示意图; b. 实物图

    Figure  1.  Model device

    图  2  土粒试样颗粒级配曲线

    Figure  2.  Grain grading curve

    图  3  吸力桶模型

    a. 示意图; b. 实物图

    Figure  3.  Caisson model

    图  4  贯入点布置

    Figure  4.  Penetration point layout

    图  5  水平静载荷试验

    Figure  5.  Horizontal static load test

    图  6  0.01kN水平力循环过程荷载-位移关系

    Figure  6.  Load displacement relationship of 0.01kN horizontal load

    图  7  0.03kN水平力循环过程荷载-位移关系

    Figure  7.  Load displacement relationship of 0.03kN horizontal load

    图  8  桶形基础累积变形与循环次数N之间的关系

    Figure  8.  Relationship between cumulative deformation of bucket foundation and number of cycles N

    图  9  (θN-θ1)/θs-N关系曲线

    Figure  9.  Relation curve between (θN-θ1)/θs and N

    图  10  旋转角测定示意图

    Figure  10.  Schematic diagram of rotation angle measurement

    图  11  旋转中心变化趋势

    Figure  11.  Change trend of rotation center

    表  1  土粒试样物理力学参数

    Table  1.   Mechanical parameters of sand

    物理参数 平均粒径d50/mm 最小干密度ρd,min /g·cm-3 最大干密度ρd,max /g·cm-3 相对密度Dr 内摩擦角φ /(°) 重度γ /kN·m-3
    量值 0.71 1.37 1.72 51.39% 34 20
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出版历程
  • 收稿日期:  2021-04-09
  • 修回日期:  2021-09-07
  • 刊出日期:  2021-12-25

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