基于应力增量的单桩p-y曲线分析方法

发布时间：2019-07-23 13:20

【摘要】：p-y曲线研究进展一直缓慢,究其原因是缺乏一套成熟的理论体系作支撑。通过考虑桩侧土的实际应力状态,引入Vesic圆孔扩张理论对水平受荷桩p-y曲线进行研究,建立了新的基于应力增量的p-y曲线分析方法。该方法综合考虑了桩侧土体径向应力增量、纵向应力增量效应及桩体深层转动挠曲对水平土抗力的贡献,是一种考虑多种因素的p-y曲线解,可适用于不同桩型条件下的单桩受力分析。算例结果表明:基于应力增量的p-y曲线分析方法在水平受荷桩应用中赋有很好的正确性和准确性,较Reese法、API法和Kim法对大变形问题有更高计算精度。以上研究成果对p-y曲线的发展及深入研究具有重要意义。
[Abstract]:The development of p-y curve has been slow, the reason is lack of a set of mature theoretical system to support. By considering the actual stress state of the pile-side soil, the p-y curve of the horizontal load-bearing pile is studied by introducing the Vestiic circular hole expansion theory, and a new method for analyzing the p-y curve based on the stress increment is established. The method comprehensively considers the contribution of the radial stress increment, the longitudinal stress increment effect and the deep rotation deflection of the pile side to the horizontal soil resistance, which is a p-y curve solution considering various factors, and can be applied to the stress analysis of the single pile under different pile type conditions. The results show that the method of p-y curve based on stress increment has good accuracy and accuracy in the application of horizontal load pile, and the method of Reese method, API method and Kim method have higher calculation accuracy. The above results are of great significance to the development and in-depth study of p-y curve.
【作者单位】：东南大学岩土工程研究所;东南大学江苏省城市地下工程与环境安全重点实验室;
【基金】：国家重点研发计划项目(No.2016YFC0800201) 江苏省建设系统科技项目资助(No.2014ZD66) 中央高校基本科研业务费专项资金资助江苏省普通高校研究生科研创新计划资助项目(No.KYLX16_0244)~~
【分类号】：TU473.1

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