中文摘要：

首先对CFG桩复合地基的研究现状和常用的沉降计算方法进行了简要的概述和分析，找出当前算法中所亟需解决的问题；再针对桩间土的位移模式中存在的缺陷对其进行了算法上的改进，将基于路堤荷载作用下的沉降计算过程进行了建立，改进时对具有非同步性的土体形变和桩土相对滑移进行了考虑；然后通过实际的工程应用案例对文中改进的算法进行了进一步的验证，并与规范的沉降算法、荷载传递算法进行了对比，表明了方法的可行性、可靠性和合理性。

英文摘要：

Firstly, summarizes and analyzes briefly the research status of CFG pile composite foundation and the common settlement calculation method, find out the solutions needed in the algorithm. Then, aiming at the existing defects of displacement modes of soil between piles in the improved algorithm, the calculation of the process of settlement under embankment load based on the establishment of improved soil and pile soil deformation with non synchronous slip were considered. And then through the actual engineering application case was further verified the improved algorithm in this paper, and compared with the normalized settlement algorithm, load transfer algorithm. The results show that f the proposed method is feasible, reliable and reasonable.