多层地基中横向承载变刚度桩的计算与实践

提出了层状地基中横向承载变刚度桩内力和位移的计算理论，该理论不但适用于抗力系数任意变化的单层或多层线弹性地基，而且适用于刚度沿轴线任意变化的桩，完全统一了横向承载线弹性地基桩计算方法，开发了应用程序，并对程序的计算结果进行了实验检验，介绍了一个工程应用实例。实践证明，该计算理论和应用程序通用性强，计算结果可靠，精度足够，可以应用于桥梁工程中的桩基计算。

Theory and spplication on base pile with varying rigid in layers foundation under action of horizontal loads

The paper puts forward a theory to calculate inner force and displacement of piles in layers foundation under the action of horizontal force, the theory is not only adapted for single layer or many layers liner elastic foundation, but also adapted to piles with varying rigid along its axis, so the calculation methods have been unified completely. An applied program was worked out and calculated results of the program were tested with experiments. An applied instance of engineering is also introduced. Practice shows the program can be commonly used and the calculated result is reliable, the precision is enough.The program can be applied to calculate base piles of bridge engineering.