Study On Heavy-Duty Asphalt Pavement In Tianjin Binhai New Area

With the development of national economy and road transportation, more and more vehicles of oversize and overload are operating on road, which causes the distresses such as fatigue, rutting etc, The tianjin binhai new area road also appeared the phenomenon,which "this year had builded,in the next year the road has crack". The reason is overloaded vehicles in the binhai new area and current pavement design specification is standard axle load 100kN basis, if the volume of the big for heavy roads, road will appear one-time damage.Based on previous research results and in orde to solve this anxious problem which in Tianjin Binhai new area, through the means of traffic and axle load survey, axle load of sensitivity analysis and the conversion same cumulative yield under different axial times, puts forward the standard axle load heavy axle load standard is 130kN in binhai new area;Through the basic asphaltum highway surface, the mechanics of semi-rigid semi-rigidity surface layer thickness, the most unfavorable for shear modulus of basic position, the best value for pavement structure design, and provide some guidance,Through the Mechanics analysis on Semi-rigid bituminous pavement, get the conclusion on overloading of asphalt pavement condition semi-rigidity surface Proper layer thickness, the most disadvantageous position for shear and The best grassroots modulus,this will be provide some guidance for pavement structure design; Through the structural base thickness and subbase the reasonable selection of thickness, and the corresponding mechanics calculation and analysis of lifetime, eventually,recommend the asphalt pavement structure types, its suitable for overloading conditions in the Tianjin Binhai new area.