Research On Impact Of Temperature Difference In Different Aeras On Asphalt Pavement Structure Design

China enjoys vast territory. There can be seen the frigid, temperate and tropical zone from the north to the south, and 4000 meters altitude gap from the east to the west. Therefore, the natural environmental differences are prominent in different parts of China .The asphalt pavement, as a structure exposed to nature and shouldering the double effects of natural conditions and the pressure of vehicles, is damaged to some extent. In hot days at while in cold winter, it is suffering from rutting,flushing at while cracking. In the welting periods of spring, it's often damaged because of the instability of earth subgrade and water erosion. So avoiding these damages is a difficult problem and our top priority now.The current specifications for design of highway asphalt pavement in China adopt the asphalt-concrete compression rebound modulus and cleavage strength of 15℃and 20℃as the designing parameters.These given temperatures are taken into consideration in the construction asphalt pavements, but it is hard to cover all the temperature zones in the whole country.With the asphalt pavement influence of the temperature difference in different areas on the intensity and lifespan of pavement, the author, choosing semi-rigid type base and flexible base in 9 areas to be the study objects, discourses upon the influence of different temperature on the structural design of asphalt pavement by calculating the surface deflection and the base bed's tensile stress of asphalt pavement in different times and places, and thus measuring the fatigue life of each structural, this paper focuses on the following points.Tt was analied the temperature difference in different climate zones of China.Tt was produced the designing parameters for the construction materials under the condition of different temperatures in different months.It was calculated the deflection on the surface of asphalt pavement, bottom layer tensile stress and analied the differences in the standard of pavement designing. The forecast of the lifespan was conducted according to the tested tensional stress in different months of various areas, quantificationally summarizing the influence of temperature on the pavement structure design.Because the asphalt mixture is one type of viscous-elastic material, temperature exerts grave impact on the asphalt pavements. This study is attempted to calculate the deflection on the surface, the semi-rigid base and the fatigue lifespan of the asphalt pavements. According to the material parameters in different temperature, it is concluded with the influence of temperature on asphalt pavement.This study is hopeful to provide suggestion and implications for the design of the asphalt pavement structure and the standard modification.