Analysis of Strain Law of Structural Layer of Semi-rigid Base Asphalt Pavement with Graded Crushed Rock

Based on the long-life test road project of Yunluo expressway in Guangdong province, the strain law of the semi-rigid asphalt pavement with graded crushed rock was analyzed and studied. Firstly, the ANSYS finite element analysis model was established according to the structure of Yunluo long-life test road, and the strain data of corresponding points were extracted according to the strain arrangement scheme of Yunluo test road. Secondly, FWD was used as the loading device, and the strain data of different points of the corresponding structure layer were obtained according to the test scheme of the long-life test road of Yunluo. Finally, through the analysis of the theory and the measured strain data, the strain law of the semi-rigid base asphalt pavement with graded gravel rock was obtained. To grasp the mechanical response law of this type of asphalt pavement structure, it would provide useful help for the design, construction and maintenance of the semi-rigid base asphalt pavement structure with the graded crushed rock. (paper)