Study On The Technology Of The Complex Pavement In Short Road Sections

With the continuous development of highway construction, high-grade highways have been gradually shifted from cities to the nearby mountain plain area extend. Because of mountainous terrain, geology, natural environment, such as complex and changeable conditions, road construction to high technology has brought many problems, especially high-grade highway base throughout the mountains, the inevitable use of a lot of bridges and tunnels, is located between the tunnel transition section (often referred to as "short sections") will be followed, the transition from short sections (sometimes less than 200m), more complex road conditions, as the geology, topography and road conditions linear constraints, the design construction complicated than ordinary roads, there are many problems. Therefore, to the business community through the Qinba mountain highway and bridge when the bridge (tunnel) between the short sections of the project based on short sections of road to carry out structural analysis with the combination of the quality of road construction and engineering evaluation of the research has a good application value.In this paper, based on the characteristics of short sections, mainly to carry out the following five areas of research: (1) the use of three-dimensional finite element software to establish the structure of the model calculation, an analysis of the impact of steel fiber reinforced concrete slab load stress factors and the law, and in the light of norms of temperature stress and fatigue stress analysis, which estimates the minimum thickness of the board; (2) summarizes the characteristics of short sections, an analysis of the structure of short sections of road portfolio, determine the type of surface structure of asphalt concrete and steel fiber reinforced concrete composite road. By analyzing the role of the bonding layer of adhesive material to the technical requirements; (3) of steel fiber reinforced concrete in accordance with the basic theory, combined with regulatory requirements to determine the steel fiber reinforced concrete with the ratio; studied a view not of the same age, different steel fiber doped the volume of steel fiber reinforced concrete under fiexural strength and compressive strength and the changes of flexural modulus of elasticity and shrinkage performance, at the same time to improve concrete pavement performance, research the superplasticizer on the strength of steel fiber reinforced concrete impact; (4) in steel fiber reinforced concrete pavement construction, as construction of short sections, select a minicomputer is reasonable, in order to better control the quality of short sections of the construction, in the light of ordinary cement concrete pavement construction process, the short section of steel fiber reinforced concrete pavement construction process have been studied ; (5) to carry out the works on the short section of the quality of detection, the detection of low points, in order to enable the evaluation of short sections of a more scientific and rational, using the methods of mathematical statistics to determine the minimum capacity of the samples and to study the compaction quality of deflection, the formation of , the thickness and geometry, such as road subgrade reasonable evaluation.