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本文对复合载体夯扩桩进行了有限元分析，在分析中通过现场取样和模型试验确定夯扩挤密区范围，通过分段线性插值确定夯扩影响区土单元的材料参数，从而能够较为准确地分析这种桩承载力的特殊性状。本文根据计算结果讨论了桩身的荷载传递规律、承载力的计算及最优夯扩体直径的确定，同时也比较了这种桩与扩底灌注桩在承载力特性方面的区别，从而揭示了复合载体夯扩桩承载力性状的基本规律，说明了复合载体夯扩桩是一种承载力性能优越的桩型。
In this paper, finite element analysis of composite carrier rammed-expanded pile is carried out. In the analysis, the range of rammer compaction zone is determined by field sampling and model test, and the material parameters of rammer-affected zone are determined by piecewise linear interpolation so as to be more accurate To analyze the special characteristics of the pile bearing capacity. Based on the calculation results, the paper discusses the law of load transfer, the calculation of the bearing capacity and the determination of the diameter of the optimum ram. At the same time, the differences between the bearing capacity characteristics of the pile and the expanded bottom pouring pile are also discussed. The basic law of bearing capacity of composite carrier compaction expanded pile shows that the composite carrier compaction expanded pile is a pile with superior bearing capacity.