Research On Design And Construction Technology Of Pavement In Kuancheng C Twenty-two Road

In recent years, with the rapid development of China’s urban road, the early damage of asphalt pavement has become the focus of attention. Research shows that the damage causes of asphalt pavement is mainly due to the infiltration of water, plus long-term vehicle load and natural environmental factors, which results in asphalt pavement structure and material damage, cracks, pits and track diseases. These diseases greatly reduce the use of asphalt pavement performance, the service life, the driving safety and comfort having produced a threat that can not be ignored. Jilin is located in the northeast, and it is a typical seasonal frozen soil area,with hot and rainy in summer and cold in winter frost, the asphalt pavement are destroyed more serious in high rainfall erosion and low temperature freezing thawing process, coupled with irrational urban sewage discharge, making urban asphalt road improvement problem imminent.To solve this problem,mainly two issues need to be considered,one is the design optimization of asphalt pavement material, improve the water stability of asphalt pavement; the second is to improve the urban road drainage performance, making arrangement of drainage facilities more scientific, reasonable.Therefore, based on the road design and construction of Changchun City, Jilin Province, this paper has carried on the following research:(1) The climatic characteristics of Changchun city in recent years were summarized and analyzed, and the hydrogeological conditions of the construction section of the twenty-two road were investigated. The types and characteristics of soil water quality were summarized and analyzed.(2) According to the climatic characteristics and environmental factors of asphalt pavement materials for optimization design, using the grey correlation degree analysis method to determine the optimum dosage of agent changing in asphalt binder, and optimize the design of asphalt mixture forming process and optimum asphalt aggregate ratio by response surface methodology.(3) According to the formula of hydraulic experience, considering the road longitudinal slope, cross slope and ditches in the internal flow factors synthetically,and make a research on cross-sectional, longitudinal section, flat profile and kerbs etc of urban road. Put forward reasonable improvement methods and measures, to alleviate the problem of urban road water.(4) Practice the pavement asphalt material design and drainage design in Changchun City C twenty-two Road, and put forward in the road pavement materials and drainage construction technical problems and matters needing attention.