Study On Stress Analysis And Design Index For Asphalt Surface Of Continuously Reinforced Concrete Base Asphalt Pavement

Recently highway transportation in china has developed into the trend of large flow and heavy load, so it put a high standard for the structural strength and performance of pavements. Combining soft with rigid, Continuously reinforced concrete base asphalt pavement (AC/CRC) has good performance, long life and low cost during its life-cycles, that the features adapt to the current trends of highway transportation, account for it's excellent quality, AC/CRC will have broad prospects and more developments in heavier transportation and highway application. In China, but continuously reinforced concrete asphalt pavement is still a new concept, it's structural design was almost blank.By use of the finite element method and referring to the domestic and foreign research results, this paper take the analysis for AC/CRC's load stress and the impact of asphalt surface to the temperature stress of continuously reinforced concrete base, which deduced design basis of the base thickness and asphalt thickness in this kind of pavement's structure design.By use of the finite element method and multiplayer elastic system program, this paper analyzes the interlaminar shear stress and the drawn(or crush) stress in the bottle of asphalt surface in this kind of pavement, that concluded the interlaminar shear stress is an important design index in determining the asphalt surface's thickness, however, the drawn stress in the bottle of asphalt surface may be not the design index of asphalt surface's thickness.Through the analysis of the shear stress, Rutting and comfortable index, this paper gives the range of asphalt surface's thickness, and raises the design index of asphalt surface's thickness and steps for this kind of pavement.