Study On Prediction Of Asphalt Pavement Performance Of Trunk Highway In Hunan

With the rapid development of Hunan economy,the construction of the national and provincial trunk highways also have been flourishing.With the continuous increase of traffic load,the pavement performance of trunk highways are decreasing year by year.In recent years,the trunk highways have entered the overhaul engineering of asphalt pavement.The most concern for the highway management department is how to determine the maintenance timing and the allocation of maintenance funds after the pavement overhaul.Combined with the actual demand of trunk highway maintenance in Hunan,the following research has been done.First of all,the national and provincial trunk highway of Hunan province are taken as the object of investigation,the asphalt pavement diseases,drainage facilities and maintenance status of asphalt pavement in each city are investigated,then the analysis are carried out,which contains the causes of asphalt pavement diseases,the criterion of curing time is obtained by according to the timing of actual maintenance and the measures adopted in the current regulation.Secondly,the impact of precipitation,temperature and maintenance level on pavement performance is explored,based on the actual survey.In order to accurately reflect the decay law of asphalt pavement,Asphalt pavements in Hunan province are reasonable divided after considered the difference of climatic factors and maintenance levels.In addition,the test data is analyzed,combined with the road network partition data integration,and the suitable forecast model to forecast data is selected,considered the test database established for a short time.Finally,the decay equation of the performance of the typical structure of asphalt pavement in various regions of Hunan Province is put forward,based on the analysis of the decay law of asphalt pavement in each region.The decay equation of the typical structure of each network area is established,based on the actual situation of the road network area.The decay of the law is revealed,which from the performance of different types of overhaul structures in different regions,and the practicability of the paper model is verified by comparing the application of different models,and the timing of conservation has been predicted for the province to provide a theoretical basis for the allocation of funds.