Research On Cement Concrete Road Upgrading And Reconstruction Of Shenyang-Dandong First-Class Road

The main reasons for the road improvement and reconstruction are : the highway has already reached the service life, and its function can no longer meet the application reqiuements, so it must be improved and rebuilded; although the road has not achieved the design service life, it could not satisfy the road usage requirement, its reasons are: (1) in the initial period of a project, when formulating the project scale and technology standards for an old road engineering, underestimate the volume of traffic growth result in the traffic capability has already saturated before the end of service life, and traffic jams happen frequently, the service level is low; (2), because of the serious phenomenon of overload or the deficience of pavement design and construction, some cement concrete pavement has been destroyed before the design life. This paper takes the reconstruction project of cement concrete arterial road from Shenyang to Dandong as an example to put forward the methods of road improvement and the reconstruction strategy based on the synthesis evaluation of the original road surface's technical state and analysis of reasons for each road disease respectively. The test results indicate that after the old cement road surface smashed and stabilization treatment, it is reasonable to adopt deflection value as designing and examing target. Not only the deflection value is operated easily, but also the bearing capacity after treatment on the old surface could be controled efficiently. According to the research of resurfacing asphalt pavement on the original road surface separately in the state of good, bad, and worse road condition, this paper proposed improving plans and the deflection control indexs. The reseach results will be great useful to upgrade and rebuild the similar old cement concrete pavement in future.