Structure design of asphalt pavement based on cross-anisotropy of macadam base

In order to analyze the effect of macadam cross-anisotropy on asphalt pavement structure design, and evaluate the performance of asphalt pavement with macadam base, state-space theory was used, cross-anisotropic layered elastic system theory was established, pavement structure analytical program ANISOLAYER was compiled, and asphalt pavement structure designs based on the crossanisotropy of subgrade and macadam base were analyzed. Five common asphalt pavement structures with macadam base were considered, the three-layered nomographs of thickness design for asphalt pavement structure were given, and the program design of asphalt pavement structure was carried out for a typical example. Analytic result shows that AC strains and surface deflections are close to 50% of their permitted values, the compressive strain at the top of subgrade is main critical pavement response, and the rutting is main pavement demolishing model.