Study On Structure Design Of Asphalt Pavement Under Heavy Load Traffic

With rapid economic development of China, the number of road traffic in the lane and the truck are increasing. The pavement which is designed by standard specifications has been unable to meet the requirement of the gradual increase of large cargo transport vehicles for road use.According to the action mode of the tire to ground under heavy load in conjunction with the standard load drawing, This paper proposes an asphalt pavement load schema under heavy traffic. It studies on the failure mechanism of the pavement structure based on the layered and elastic theory. According to two different load drawings, it calculates and researches on the indicators of the road surface deflection, tensile stress in the bottom layers of the structure, rutting, subgrade compressive strain on top calculation. Through each indicator regression analysis of the mechanism of destruction of the pavement structure, it proposes heavy-duty asphalt pavement axis conversion method based on every equivalent indicator. By studying on road construction mechanical characteristics and material properties in heavy traffic asphalt pavement structure design. It presents material parameters for heavy asphalt pavement design. Researching and summarizing on heavy-duty asphalt pavement design specifications, traffic parameters, structure thickness and combinations and so on, this paper presents overloaded asphalt pavement design method systematically. Combining with a project example, it analyzes and summarizes to the use of local road conditions and materials by calculating and analyzing and justifies the heavy-duty asphalt pavement design method.