为了准确预测自升式海上平台桩靴入泥深度，基于扩展型桩靴在多个海上风场驻位时采集的工程数据对多种桩端承载力理论与基础承载力理论进行检验，经浅持力层与深持力层工程检验原位测试法应用于扩展型桩靴承载力计算具有良好的结果，可准确推测扩展型桩靴入泥深度。原位测试法在浅持力层误差不大于2.6 m时准确率达到100%，若在安装平台范围内深持力层土层发生变化时，桩靴入泥深度准确率达65%，该方法中粉土与粉质粘土地质桩靴阻力修正系数在0.05～0.06之间。
In order to accurately predict the spud-can penetration depth of jack-up offshore platform, multiple pile tip bearing capacity theories and foundation bearing capacity theories were tested based on the depth data of extended spud-can at the standing time. The in-situ testing method has a good agreement with the calculation results of the bearing capacity of extended spud-can after testing the engineering data of shallow and deep bearing stratum. When the error of shallow bearing stratum is less than 2.6m, the accuracy of in-situ testing method can reach 100%. If the depth of bearing stratum changes within the range of offshore platform, the accuracy of the penetration depth can reach 65%. In in-situ testing method, the resistance correction coefficient of silty soil and silty clay geological spud-can ranges from 0.05 to 0.06.
2023,45(14): 104-107 收稿日期：2023-3-22
DOI：10.3404/j.issn.1672-7649.2023.14.019
分类号：U661.4
基金项目：国家自然科学基金委员会面上项目（51778312）
作者简介：杨苏春(1988-),男,博士,工程师,研究方向为桩基工程。
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