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采用线弹性-塑性荷载传递函数，导出了成层地基中桩的轴向荷载-沉降曲线的解析递推公式。通过拟会实测Q-S曲线，可得到桩上系统的工程力学参数，并由此计算得到桩身轴力及侧摩阻力分布曲线。经许多工程验证，该方法有广泛的适用性及较高的分析精度，对分析桩的荷载传递机理、指导桩的工程设计及工程测试具有实用价值。
Using the linear elastic-plastic load transfer function, analytical recursion formulas for the axial load-settlement curves of piles in layered soils are derived. Through the actual measurement of the Q-S curve, the engineering mechanical parameters of the pile system can be obtained, and the axial force and lateral friction resistance distribution curve of the pile body can be obtained from this calculation. It has been verified by many projects that this method has wide applicability and high analysis accuracy. It has practical value for analyzing the pile load transfer mechanism, guiding pile engineering design and engineering test.