根据不同的路面结构———刚性路面、半刚性基层沥青路面和柔性基层沥青路面 ,分别采用临界荷位的板底拉应力、半刚性基层底部拉应力和土基顶面压应变作为控制指标 ,分析不同轴限对道路路面设计厚度的影响 ,得出了路面增加厚度与轴限的关系曲线。并计算了不同轴限下所需增加的道路建设费用 ,为轴限方案的比较提供了依据 According to different pavement structure --- rigid pavement, semi-rigid base asphalt pavement and flexible asphalt pavement, the bottom tensile stress of the critical load, the bottom tensile stress of the semi-rigid base and the top surface compressive strain of the soil foundation are taken as the control indexes respectively. The influence of different shaft limits on the thickness of road pavement is analyzed. The relation curve between the thickness of the pavement and the shaft limit is obtained. And calculates the additional road construction costs required under different shaft limits, providing a basis for the comparison of the shaft limit programs