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研究水平承载桩反应特性的传统方法,如K法、C法及M法等,都是基于土反力与桩水平位移关系随深度按某种规律变化的假设。本文在分析实测资料的基础上,得出了一个可精确描述水平承载桩弯矩的数学表达式,并以弹性梁理论为基础,得到了剪力、土反力以及桩水平位移特性的计算公式。由本文方法反算的P-Y曲线与美国API规范推荐方法的结果吻合很好。本文还举出了如何用于设计的例题,并与有限元分析结果进行了比较。
The traditional methods for studying the response characteristics of horizontally loaded piles, such as K method, C method, and M method, are all based on the assumption that the relationship between the soil reaction force and the horizontal displacement of piles varies with depth according to a certain law. Based on the analysis of measured data, this paper obtains a mathematical expression that can accurately describe the horizontal bearing pile bending moment. Based on the theory of elastic beam, the calculation formulas of shear force, soil reaction force, and horizontal displacement of pile are obtained. . The P-Y curve backcalculated by this method is in good agreement with the results of the US API specification. This article also gives examples of how to use it for design and compare it with the results of finite element analysis.