THE STRESS ANALYSIS OF ASPHALT OVERLAY STRUCTURE WITH THE PRESENCE OF CONCRETE PAVEMENT BASE VOID AND THE TREATMENTS

摘要

A model was created to analyze the stress of asphalt composite structure, composed with concrete pavement and asphalt overlay above with the existence of concrete pavement base void. The results indicated that the stresses of composite structure are actively affected by the area of the void. The increase range is directly proportional to the degree of base void' area.The results have the important effect on the treatments to the base void.Because the low modulus and thin layer asphalt mixture was set up, the stresses were reduced in relief. Those results above displayed that the low modulus and thin layer asphalt mixture is a good structure, which can reduce the stresses of the asphalt overlay obviously. The mixture has an important direction of design for asphalt overlay on concrete pavement.