Stress Analysis Of The Layer Between Asphalt Pavement Under Over-Loading Vehicles

Failure mechanism of asphalt pavement is always being a key point for researchers in road engineering, Vehicle loads is one of important factors to lead pavement damage. The stress state of asphalt surface layer is so complex due to varying statement of running vehicles, for example its starting, barking, acceleration and deceleration, and different road structure.Slippage and crowding of asphalt surface layer are two ordinary kinds failure situation occurred in road engineering practice, it is close to the horizontal load introduced by Vehicles and the connect state of interface between Asphalt layer and base-layer; and physical characteristic lead to road damage under vehicle loads can be clear out accurately by Finite Element Method (FEM). The horizontal force and vertical force made by running vehicles are obtained by set one half model of lorry in the paper; Companies with field strength shear test of selected roads(connect two cities) , the FEM model of the roads is set and different road structure (two style structural road ) is simulated with computer simulation technique by the author too. Finally, the stress distribution of shear stress between asphalt surface layer and base-layer is list and the ability of anti shear stress of the two structures of the roads is comparing under EQ1141G Lorry.The field shear strength testing between asphalt surface layer and base-layer is very important to the analyzing of connect state between two layers. The field shear strength testing is made with the testing system which made by the team. The connect state is get out by the results. Finally, the results of the testing are analyzed by the Coulomb-Moore's intensity theory of soil mechanics.