With a suggested displacement model , this dissertation takes the interaction of soil and piles into consideration and derives an analytical - function of compressive deformation of stabilized layer of composite foundation under embankment . analytical - functions are also derived of frictional resistance between pile and soil and of the pile - soil stress ratio 本文在假设的位移模式下,考虑桩土相互作用,通过力学推导,得到了路堤荷载下复合地基桩侧摩阻力、加固区桩间土压缩量和桩土应力比的解析表达式。