| After decades of development, the provincial trunk highways is an important component part of road network, for the national economy has brought the very big development, to undertake a large number of regional transport tasks, can say the development of regional economy cannot leave the provincial trunk highway service. In the mountains of provincial trunk constantly improve at the same time, many on the surface of the asphalt performance gradually decline, road disease, need to undertake large and medium-sized repair. Therefore, for the maintenance of the province main work widely attention. Maintenance methods varied, but different methods have different adaptation range, and different areas have different characteristics of road environment, therefore, need a detailed investigation, comparison and analysis, choose the road that is suitable for the characteristics of economic, environmental and maintenance methods. Road maintenance quality assurance is also widespread concern,therefore, how to improve the quality of road maintenance, guarantee the asphalt surface performance, and maintenance workers need to attach importance to the problem. Sign on this, this article will be on the mountains GuoShengDao road maintenance methods and maintenance quality assurance to study these two issues.At first, this paper analyzed the characteristic of mountain roads and mountains as a provincial trunk line, for example, field tests and analysis of road disease, use of pavement damage and pavement structure bearing capacity of these two indicators to evaluate the old pavement, through the model was carried out on the field survey data calculation, analysis of the main sections of road disease situation, combined with the existing regeneration method of adaptive scope, requirement analysis and specification,cold mountain roads suitable for in situ regeneration. Then, from two aspects to study the quality control of asphalt cold in-place recycling method, on the one hand, from the mixture design phase is studied, the optimal mixture ratio; On the other hand, from the construction process, sum up out in the construction process of quality control points.Finally, through the actual case analysis to evaluate the effect of cold regeneration in situ, the results showed that the in situ regeneration is suitable for cold mountain provincial trunk line. |
