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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。
The progress of the p-y curve has been slow, because of the lack of a mature theoretical system for its support. By considering the actual stress state of pile side soil, the Vesic circular hole expansion theory is introduced to study the p-y curve of horizontal piles, and a new p-y curve analysis method based on stress increment is established. The method takes into consideration the contribution of the radial stress increment, the longitudinal stress increment effect and the deep bending deflection of the pile body to the horizontal soil resistance, which is a py curve solution considering various factors and can be applied to different Stress Analysis of Single Pile under Pile Type Condition. The results show that the p-y curve analysis method based on stress increment has good accuracy and accuracy in the application of horizontal piles. Compared with the Reese method, the API method and the Kim method, the p-y curve analysis method has higher computational accuracy. The above research results have great significance for the development of p-y curve and further study.