Study On The Structure Design And Typical Structure Of Guizhou Mountainous Area Cold Recycled Asphalt Pavement

After years of development, China’s highway construction has been in the past, at present there are a large number of highway maintenance is required, therefore it is imperative to research on the technology of maintenance. This article will combine the guizhou province transport for scientific research project "the cold regeneration technology application research on" study of in situ regeneration on the surface of the asphalt pavement structure.This article mainly aims at the cold regeneration of asphalt pavement is studied on the base of the cement stable macadam mixture, first of all, reading lots of literature at home and abroad, to the technology at home and abroad, summarized the research and application results of summary, provide a reference for later study. And then to cool regenerated technology in guizhou province in the field application status and the existing regenerative structure study of axle load adaptability, through to the guizhou province comprehensive investigation in the field of cold regeneration technology application, to use in guizhou on-site cold recycling machinery, technology, structure form and material before and after regeneration on the surface of the trunk highway traffic characteristics and regeneration of posterior major diseases and so on the understanding; Through the application of the technology is relatively mature in guizhou region the focus of the investigation, and learned the usage of the existing pavement structure in guizhou and the class structure of traffic axis load adaptability;Through the investigation and theoretical analysis, comparative analysis of the existing structure of cold regeneration in guizhou actual affordable can bear the difference of traffic flow, traffic volume and theory and accordingly summarizes the good experience in the technology application in guizhou, and the scene in the application of cold regeneration technique in guizhou is analyzed. In the cool regenerated technology in guizhou has carried on the preliminary investigation, the research of cold reclaimed asphalt pavement structure design will be based on new theory and method of asphalt road surface design, optimization, so that it can be applied to a good site in the design of cold recycled asphalt roadbed structure. Mainly through field test and laboratory test of the cold recycled asphalt pavement structure design parameters are studied, and the road through the experiment to optimize the design of the existing method, to put forward combining with the material composition design of the cold recycled asphalt pavementstructure design process. According to the above research results, the cold recycled asphalt pavement typical structure in guizhou is studied, based on the traffic volume, the cold regeneration of the thickness of the layer of the basal intension of regeneration layer design sensitivity analysis, will be 12 million times the following traffic is divided into seven grades, will be greater than 70 mpa basal intensity is divided into four grades;By means of in situ regeneration structure subgrade pavement design sensitivity analysis of parameters, and combined with previous research analysis results of guizhou province, put forward a relatively reasonable field of cold reclaimed asphalt pavement structure combination, and based on the theory of finite element mechanics analysis and comparison of the class structure combination; On the basis of the foregoing through the theoretical calculation of different strength grade of the basement has been put forward,the level of different traffic at the scene of the typical cold reclaimed asphalt pavement structure.Through the study of this article, to live in guizhou cold regeneration of asphalt pavement structure selection provides the basis. Through adaptability evaluation summarizes traffic capacity of the existing structure can be used in guizhou, to the application of structural design research put forward the optimization of cold reclaimed asphalt pavement structure design process, through typical structure research, proposed more than one hundred points, secondary and tertiary road in typical structure forms,which can be chosen by the practical engineering.