欢迎访问《太阳能学报》官方网站,今天是 分享到:
ISSN 0254-0096 CN 11-2082/K

太阳能学报 ›› 2023, Vol. 44 ›› Issue (2): 172-180.DOI: 10.19912/j.0254-0096.tynxb.2021-1166

• • 上一篇    下一篇

基于静力触探的黏土中桩基p-y曲线研究

刘金昊1,2, 张帆1,2, 戴国亮1,2   

  1. 1.东南大学混凝土及预应力混凝土结构教育部重点实验室,南京 211189;
    2.东南大学土木工程学院,南京 211189
  • 收稿日期:2021-09-26 出版日期:2023-02-28 发布日期:2023-08-28
  • 通讯作者: 戴国亮(1975—),男,博士、教授、博士生导师,主要从事岩土工程教学和科研工作。daigl@seu.edu.cn
  • 基金资助:
    国家自然科学基金面上项目(52078128)

RESEARCH ON p-y CURVE OF PILE FOUNDATION IN CLAY BASED ON CPT DATA

Liu Jinhao1,2, Zhang Fan1,2, Dai Guoliang1,2   

  1. 1. Key Laboratory of Concrete and Prestressed Concrete Structures of Ministry of Education, Southeast University, Nanjing 211189, China;
    2. School of Civil Engineering, Southeast University, Nanjing 211189, China
  • Received:2021-09-26 Online:2023-02-28 Published:2023-08-28

摘要: 将华能灌云海上风电场试桩试验实测数据与4种基于CPT测试的黏土p-y曲线方法的理论计算结果进行对比。对比显示:传统的p-y曲线因其原始试验的局限性会显著低估桩侧土体的极限土反力,使桩基设计偏于保守;而双曲线型的p-y曲线虽然高估桩侧土反力,但是对桩侧土体初始刚度预测较准。根据以上对比分析结果,采用Matlab回归函数进行模型集成,将传统型p-y曲线模型与双曲线型p-y曲线模型结合,提出一种基于CPT测试的适用于黏土的复合p-y曲线模型。最后通过与已有工程实例实测数据进行对比,验证了新提出方法的可靠性。该方法可为黏土中水平受荷桩基计算提供新途径。

关键词: 海上风电, 静力触探, 模型集成, p-y曲线

Abstract: This paper uses the measured load test data of the pipe pile of Huaneng Guanyun Offshore Wind Farm to verify the applicability of the four proposed p-y curve methods for clay. The parameters of p-y curves are obtained using cone penetration tests (CPT). The comparison results show that the traditional p-y curve will significantly underestimate the ultimate resistance of the surrounding soil due to the limitations of the original test, leading to a conservative pile design, while the hyperbolic p-y curve may overestimate the soil resistance, therefore the initial stiffness can be accurately predicted. On this basis, model ensembling is used and a new p-y curve is established by combining the traditional p-y curve model with the hyperbolic p-y curve model . Finally, a case study is used to verify the reliability of the new p-y method. This method can provide a new way to analyze the lateral loaded pile in clay.

Key words: offshore wind turbines, cone penetration tests, ensemble averages, p-y curve

中图分类号: