An Analysis of Dehiscence Stress of the Transportation Load on Semi-Rigid Base Bituminous Pavement

During the period in which semi-rigid base bituminous pavement is being constructed and used, the pavement structure is completely exposed to the natural environment, and undergoes the atmospheric influence as well as the transportation vehicles-combined action which continues to change. The semi-rigid base has every kind of cracks, whether those cracks will develop into the bituminous pavement, they will have very tremendous influence on the pavement structure performance and the service life. This article mainly studies the effects the semi-rigid base dehiscence has on the bituminous pavement structure function, and analyzes bituminous pavement stress concentration situation. Our calculations and research prove that, under the pure action of the transportation load, the surface layer cracks which are caused by the basic unit crack can be reduced when the surface layer is made thicker.