海上风机大直径钢管桩基础水平承载特性试验研究

Experimental study on horizontal bearing capacity of large diameter steel pipe pile for offshore wind farm

东海大桥风电场二期工程进行了2根1.7 m直径钢管桩的现场水平试验,实测了桩顶荷载-位移关系、桩身变形和桩身弯矩。现场试验结果表明,API规范p-y曲线法计算偏保守,S?rensen修正的p-y曲线计算结果与实测推算结果吻合较好,建议海上风电基础设计应通过细致的地勘或试验,确定符合实际地质特征的p-y曲线或对规范p-y曲线进行修正。

The in- situ tests on lateral monotonic loading are carried out for two offshore large diameter pipe piles which diameter is 1.7 m based on East Sea Bridge offshore wind farm phase Ⅱ project. Good agreement is found between the test results and the S?rensen's correction method based on size effect on py curves and the results of API p-y curves method is conservative. It is recommended that detailed geological exploration or testing should be carried out to determine a realistic field of engineering geological characteristics of p-y curves,or the specification recommended p-y curves should be corrected in the design of large diameter steel pipe pile of offshore wind turbine foundations.