Analysis of the Selection of Calculation Points for Permanent Deformation of Asphalt Pavement and the Influence of Base Layer Thickness
In order to clarify the calculation points for permanent deformation of asphalt pavement and reduce computational workload,the vertical compressive stress on the top surface of each layer of as-phalt mixture layer at different points under different pavement structure combinations is calculated based on the theory of elastic layered system through common asphalt pavement structure combina-tions,and the influence of base layer thickness on the permanent deformation of asphalt mixture layer is analyzed.The results show that under different structural combinations,the maximum vertical compressive stress on the top surface of each layer of the asphalt mixture layer is located at the center of the double circle uniformly distributed load(point A).In the combination design of asphalt pave-ment structure,the thickness of the base layer has little effect on the permanent deformation of the as-phalt mixture layer,and only has an impact when the thickness of the inorganic binder stabilized base layer is less than 350 mm.
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