在进行路面结构层模量反演时 ,如果忽略土基模量的非线性反应特性 ,而按线性特性反演 ,将使得土基模量偏大 .因此采用一简单的非线性土基模型 ,基于系统识别原理对土基模量进行反演、分析 .正问题采用轴对称四边形剖分有限元方法计算 ,并同BISAR计算结果进行比较 ;反问题针对蓝派冲击压实的工程实际 ,采用非线性模型进行模量反算 ,对其压实效果进行分析、评估 ,取得了较好的实用效果 In the inversion of the modulus of pavement structure layer, if we neglect the nonlinear response of soil-based modulus, and the linear characteristic inversion, will make the modulus of soil-based large, so using a simple nonlinear soil-based model, Based on the principle of system identification, the subgrade modulus is inverted and analyzed. The positive problem is solved by using the axisymmetric quadrilateral finite element method and compared with the BISAR calculation results. The linear model carries out modulus backcalculation, analyzes and evaluates its compaction effect, and achieves good practical results