The Applicational Research Of Asphalt Treated Permeable Base In Freeway Of LiLong In ZheJiang Province

Many roads in our country damage of varying degrees during the initial period of building, which caused by water that is one of the main causes of early-damage of the pavement. How to effectively reduce the water-damage , extend the life of the road has become very concerned about social issues and a question need to solve now. This article from the perspective of road drainage structures, made stable by setting clear drainage gravel the grassroots level (ATPB) to prevent and reduce water-damage to the road approach.In this paper, by relying on the project which is located in Zhejiang Province to investigate the road damage and traffic survey analysis, put forward a set of drainage pavement structure drainage for the grass-roots level the importance and necessity of the the ATPB design method.ABAQUS finite element software used to establish the structure of the surface model, an analysis of the structure of layer after setting ATPB stress intensity factor with crack length changes, by comparing the original structure of the road and set up ATPB surface layer cracks, as well as cutting-edge stress intensity factor of asphalt pavement forecast fatigue life to study the stability of gravel asphalt Asphalt inhibitory reflex in the role of cracks. The results show that stable asphalt gravel drainage can effectively reduce the crack tip in the grass-roots level of stress concentration , with delay and suppression of semi-rigid asphalt surface cracks extended to the role.ATPB for the structure and functional requirements, its performance is verified. Thus, Research results will be carried out into the indoor, Styrofoam in Zhejiang province highway paving asphalt test the stability of the grass-roots level gravel road drainage, to explore the stability of the asphalt gravel grass-roots method of drainage and the sections of the drainage capacity of the actual detection ,asphalt for the stability of our country to further promote asphalt treated permeable base accumulated experience.