Study On The Mechanism Of Structural Forces Of Continuously Reinforced Concrete Pavement

At present, China highway mainly uses two kinds of pavement structure, asphalt concrete and concrete form. However, both of them exists a variety of problems which cannot be ignored. In foreign countries, continuously reinforced concrete pavement (CRCP) has been successfully applied to several decades, which has also drawn increasing attention in our country. Continuously reinforced concrete pavement is the form of rigid pavement structure which configuration according to a certain reinforcement ratio with a continuous longitudinal reinforcement in the concrete slab surface. In addition to a special place set the horizontal seams, the surface layer almost without any form of contraction joints, forming a continuous, complete carriageway surface, overcoming the ordinary cement concrete pavement because of a variety of diseases caused by various types of joints. The pavement performance is much better than ordinary Portland cement concrete pavement.This article relies on research projects "demonstration projects and key technology research of Continuously Reinforced Concrete Pavement", in Guizhou Province Communications Department. Using three-dimensional finite element method established a CRCP load stress analysis of finite element model, and analyzing the pavement thickness, the grass-roots thickness, reinforcement ratio, reinforcement location and other structural parameters on the influence of the load stress.Obtained Steel and concrete stress and displacement formula through theoretical derivation under the influence of the temperature drop and shrinkage to CRCP, and analyzing crack spacing, reinforcement ratio and other calculation parameters on the influence of the temperature stress. Then, through the crack width and crack spacing analysis, proposed control measures for cracks from design, construction, etc. Finally, the article introduced continuously reinforced concrete pavement structural design methods according to the specific circumstances of the project physical works.The results provide a theoretical basis for the continuously reinforced concrete pavement design and construction. It is important to play the advantages of continuously reinforced concrete pavement further, which has important practical significance and practical value to improve the highway quality in Guizhou Province and extend the pavement service life.