关键词: 道路工程, 响应面法, 石质路基, 结构层厚度, 疲劳开裂次数

Abstract: In order to improve the performance of asphalt pavement structure of stone subgrade, the response surface method was applied to optimize the pavement structure of asphalt surface, graded macadam base and stone subgrade. According to the new design index of the new specification for highway asphalt pavement design, the influence of the thickness of each pavement structure layer on the new index was analyzed. Taking the thickness of each surface layer and the thickness of base layer as constraints, the response surface optimization model was established by taking the number of fatigue cracking of asphalt mixture, the permanent deformation of asphalt mixture layer and the vertical compressive strain of roadbed top as response factors. The results show that the thickness of the surface layer has a significant effect on the permanent deformation, the number of fatigue cracks and the vertical compressive strain of roadbed top; while the thickness of graded macadam base layer has a little effect on the above three indexes.

Key words: highway engineering, response surface method, stone subgrade, thickness of structure layer, the number of fatigue cracking