Study On Stress And Rutting Prevention Of Asphalt Pavement On Longitudinal Slope

Based on the investigation on diseases of asphalt pavement of longitudinal grade, the article analyzes reasones that cause damage of the asphalt pavement of longitudinal grade. The rut mechanism and prediction method are proposed according to the cause of damage. Furthermore, with the economic development in China , the article proposes methods to improve the durability of the pavement of longitudinal grade from the material selection, pavement structure design and construction. The index in active design method of asphalt pavement cannot satisfy asphalt pavement of longitudinal grade, so some improving methods are proposed.This research mainly includes the following aspects:1,Analyzing the reason of damage of asphalt pavement of longitudinal grade. This research analyzes reasones that cause damage of the asphalt pavement of longitudinal grade from the force on road and vehicles,grade,speed,length of grade and the change of stress on pavement with slope,the load and depth. Based on thecharacteristics of damage , destruction of evaluation indexes of asphalt pavement of longitudinal grade are proposed.2,Reasching the rut of asphalt pavement of longitudinal grade. This research analyzes the main reason of rut in asphalt pavement of longitudinal grade , for the formation mechanism of rut and the mechanical characteristics of asphalt pavement of longitudinal grade, and proposes the corresponding prediction method of rut.3,Reasching the durability of asphalt pavement of longitudinal grade. Based on the characteristics of damage, this research proposes the method to improve the durability of the asphalt pavement of longitudinal grade , from material selection, mix proportion design, pavement structure design and construction control.4,Reasching the design of pavement structure of asphalt pavement of longitudinal grade. With the differences of mechanical characteristics and damage characteristics in asphalt pavement of longitudinal grade and general asphalt pavement, some improving methods are proposed.