通过将P Y曲线与有限元法相结合,探讨了多层地基中水平承载桩非线性受力特性分析的简捷、精确方法.该方法假定桩间土对桩单元的水平抗力按线性分布,引入线性插值函数模拟单元约束反力,导出了桩土相互作用的P Y曲线非线性有限元计算模型,利用直接迭代算法进行编程求解.工程实例分析表明:计算结果与m法相比具有良好的一致性,该方法简便,稳定性好,便于工程设计应用. By combining the PY curve with the finite element method, a simple and accurate method for analyzing the nonlinear behavior of horizontal loaded piles in multi-layered foundations is discussed. The method assumes that the horizontal resistance of pile-soil elements to pile elements is linearly distributed and introduces linear interpolation Function is used to simulate the reaction force and the PY curve nonlinear finite element model of pile-soil interaction is deduced. The direct iterative algorithm is used to solve the problem. The engineering example shows that the calculated result is in good agreement with that of m method. Simple, good stability, easy to engineering design and application.