熊根,张俊臣,金超,赵松烈,李炜,周永.基于现场试桩的海上大直径桩侧摩阻力研究[J].海洋工程,2019,37(2):120~126
基于现场试桩的海上大直径桩侧摩阻力研究
Study on the shaft friction of offshore large diameter pile based on field pile test
  
DOI:10.16483/j.issn.1005-9865.2019.02.014
中文关键词:  大直径桩  现场试验  桩侧摩阻力  拟合法  API规范法
英文关键词:large diameter piles  field test  pile shaft friction  fitting method  API standard method
基金项目:国家自然科学基金面上项目(51579227);国家自然科学基金青年科学基金项目(41206075)
作者单位E-mail
熊根 中国电建集团华东勘测设计研究院有限公司浙江 杭州 311122 xiong_g@ecidi.com 
张俊臣 国电电力浙江舟山海上风电开发有限公司浙江 舟山 316131  
金超 国电电力浙江舟山海上风电开发有限公司浙江 舟山 316131  
赵松烈 国电电力浙江舟山海上风电开发有限公司浙江 舟山 316131  
李炜 中国电建集团华东勘测设计研究院有限公司浙江 杭州 311122  
周永 中国电建集团华东勘测设计研究院有限公司浙江 杭州 311122  
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中文摘要:
      海上风机基础长期受到巨大的水平荷载和倾覆力矩,设计的基础结构需要具有足够的刚度和抗压强度来抵抗风、波浪、海流等环境荷载。依托某海上风电场试桩工程,通过现场基桩轴向抗压静载试验,分析土层的荷载位移曲线,并根据位移突变段确定基桩的极限荷载。借助拟合法和API规范法,分别得到τ-s曲线,从而计算出基桩的极限侧摩阻力以及初始刚度。分析对比可以看出软黏土土层和砂土土层在不同深度通过拟合法和API规范法计算得到的结果不同,二者有不同的适用范围。因此需要进一步研究桩基侧摩阻力的各种确定方法,才能最大限度地开发利用桩基的承载能力。
英文摘要:
      Offshore wind turbine foundation always subjects to significant horizontal loads and overturning moments. The foundations designed require adequate rigidity and compressive strength to resist marine environmental loads, such as wind wave and current. Based on an offshore wind farm field pile test, the load displacement curves of soil layers obtained from the axial compression pile test can be used to determine the ultimate load of pile foundation according to the abrupt change of displacement. With the help of the fitting method and the API standard method, the τ-s curves are obtained respectively to calculate the ultimate shaft friction and the initial stiffness of the test pile. It can be seen that the results obtained by the fitting method and the API method at different depths are different in soft clay and sand, and they have different scopes of application. Therefore, methods for determining the shaft friction of pile should be further studied, and the selecting of the methods should be considered at different depths in different soils so that the capacity of pile foundation can be developed and utilized to the maximum extent in a safe and economical way.
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