Approximate Calulation of Subgrade Stresses and Strains of Pavement Structure

Abstract:

Subgrade stresses and strains for a two-layer pavement structure under dual wheels are firstly studied. In different axles, loading positions and multilayer structure cases, the rules of compressive stresses and strains at subgrade depth are then analyzed. By introducing the concepts of side wheel coefficient ξ, adjacent axle coefficient ζ, position coefficient φ and generalizing approximate regression equations of them, universal and high precision computation expressions of subgrade vertical compressive stresses and strains under pavement structure are established.