ABSTRACT
ABSTRACT: Subgrade and pavement mainly bear the vehicle loads. The vehicle loads are dynamic loads and cyclic in nature. Subgrade produces residual plastic deformations under cyclic dynamic loads. The residual plastic deformations accumulate according to the strength of subgrade filling materials and the level of applied dynamic stress. Through the full size model tests, the variation laws of dynamic strain and stress and total deformation of the subgrade, which was a fill material with the full weathering granite, the cement stabilized soil and the reinforced soil with geogrid are discussed in this paper. Then, strength and modulus design norms of these three filling materials are described. According to the results of the model tests, the reliability and application scope of full weathering granite, cement stabilized soil and reinforced soil with geogrid in highway subgrade were assessed. The treatment effects were evaluated and the quality control standards of the subgrade were proposed.
