基于动力学和弹塑性力学理论 ,采用轴对称有限单元法系统地分析了软土地基上半刚性基层沥青混凝土路面结构体的工作性状。以不同位置的竖向位移作为表征参量 ,探讨了不同车辆荷载周期、沥青混凝土的回弹模量、半刚性基层材料回弹模量和复合地基厚度等变化对表征参量的影响。本文结论可为软土地基上道路结构体工作性状评价及 FWD的反分析提供有益参考 Based on the theory of dynamics and elasto-plastic mechanics, the axial symmetry finite element method is used to systematically analyze the working characteristics of the semi-rigid base asphalt concrete pavement structure on soft soil foundation. The vertical displacements at different positions were taken as the characterization parameters. The influence of different load cycles of vehicles, the elastic modulus of asphalt concrete, the modulus of resilience of semi-rigid base material and the thickness of composite foundation on the characterization parameters were discussed. The conclusion of this paper can provide useful reference for the evaluation of working properties of road structures on soft soil foundation and the inverse analysis of FWD