The Mechanical Properties Analysis For Cement Concrete Pavement Which Have Stress-absorbing Layer

A variety of reasons emerging cement concrete pavement cracking, breaking boards, wrong units, mud pump and other damage,leading to the road quality and efficiency quickly lower, impacting on the traffic safe seriously. Some of the construction of concrete roads not only failed to achieve the intended purpose, but on the contrary a more serious disease of the road, shorten the life of the road, and in the community which had a negative impact on the economy caused by a more big waste of cement concrete roads have had a doubt. Cement Concrete Pavement stress absorbing layer can be set to a certain extent, to enhance road performance.Of cement concrete pavement performance and structural analysis of the technical requirements of layers can be aware that in the cement concrete panels and semi-rigid layer between the added stress can effectively alleviate the damage to roads, to enhance the use of cement concrete pavement performance. Cement Concrete Pavement stress absorber settings, not only can reduce the panel of concrete pavement, and at the same time can also reduce infiltration of surface water damage to the grass-roots level on the road, because the grass-roots level to prevent damage caused by the destruction of pavement. This paper presents a set of cement concrete pavement stress absorbing layer, and through finite element analysis, respectively, from the static load, temperature, load and static load of the coupling, three aspects of dynamic load on the set to absorb the stress of the concrete pavement layer structure of the stress analysis.In this paper, finite element analysis software ansys, respectively, from the static load, temperature, load and static load of the coupling, three aspects of dynamic load on the set to absorb the stress of the concrete pavement layer structure and no stress absorbing layer of cement concrete pavement for the finite element analysis found that added stress can effectively reduce the absorption layer of cement concrete pavement panels have been the greatest tensile stress. When the cement concrete pavement and stress absorption coefficient of friction between layers of 1.0 under static load of cement concrete pavement reduces the tensile stress of 11.6%. Under dynamic load of cement concrete pavement at the end of the maximum tensile stress can be reduced by 17～24.3%. In this paper, by analyzing the different situations of cement concrete pavement panels suffered the greatest tensile stress, the recommendation of the best stress-absorbing layer thickness, in order to stress the promotion of the absorption layer to provide a theoretical basis.