Void Beneath Slab Of Cement Concrete Pavement Working Condition Analysis And Pavement Evaluation Method Research

With the mass built of cement concrete pavement, which is associated with a large number of cement concrete curing and maintenance. Direct cause of the cement concrete damage is due to the void beneath slab. It increases the deflection and stress in slab. And lead to the board rapid destruction. Correct understanding with disengaging and using the corresponding of Maintenance and repair measures. To improve service ability and the durability of cement concrete pavement has the vital significance. This paper based on the cement concrete pavement disengaging as the research object. Analysis the working conditions of empty board. Further research the evaluation methods. Put forward the Maintenance and repair measures. For pavement of cement concrete pavement void beneath slab special treatment technology to do some exploring.This paper mainly contains four parts. First of all, the author analyzes the reasons of void under slab. Then introduce the disengaging form of pavement cement concrete pavement and its law of development. And put forward the analysis form in this paper. And introduce the model and analysis theory used in this paper. The second part uses the numerical calculation based on the finite element theory of disengaging cement concrete pavement. Analysis the deflection and stress conditions at the disengaging of pavement cement concrete pavement. And by changing the parameters of pavement structure analysis of pavement structure parameters were different deflection and stress characteristics. At the same time impose dynamic loads on cement concrete pavement. Analysis the deflection and stress in dynamic load characteristics. The third part first carried out on the pavement plate. The third parts first grade division to the void beneath slab. Then according to the plate deflection under different pavement structure parameters put forward assessment method about empty board. The fourth part according to the grade division put forward repair measures about the void beneath slab of cement concrete pavement. According to the maintenance projects divided the disengaging maintenance to daily maintenance, Minor repair, overhauls. And design the content about the maintenance projects.