Study On Subgrade And Pavement Material And Typical Structure Of Rural Road For Ankang City

With the development of China's highway construction, rural road, as the support of arterial highway, has taken more and more attention by state and local governments, rural road construction are faced with unprecedented historical opportunities and favorable conditions. At the present, the rural road in Ankang city is very poor for its low grade, unreasonable layout, the low rate of road pavement and poor road conditions, which has seriously affect the development of local economy. This paper is to do detailed surey on the typical subgrade and pavement structure and material of rural Road for Ankang city based on the construction of current rural road and the scientific research subject "Study on Typical Subgrade and Pavement Structure and Material of Rural Road for Ankang City" of Shannxi Provincial Communication Department.This paper started with the analysis of natural environment feature,economic environment feature and traffic feature, we can conclude the traffic constitution, the structure, materials, diseases, of the road surface on the status investigation of ankang rural road, which provides elements for establishing typical structure. Then, by the surey of road construction materials and the analysis of elements influenced construction material selection, we recommended good-performance and economical materials as subgrade filing and pavement materials of ankang rural road. Thirdly, we ascertain the genre of dry or wet and the strength of the subgrade according to the subgrade feature of ankang rural road, and propose the design points of subgrade. Finally, through theoretical analysis, according to natural and economic environment feature, we build up the typical structure of asphalt and cement concrete pavement for Ankang rural road on the base of traffic classification, subgrade classification and the selection of pavement materials. And also, we suggest some other suitable pavement structure—stone pavement and cement concrete block pavement. And we evaluate the pavement structure proposed from aspects of economic, technical adaptability, performance and environmental impact.