| Temperature segregation of asphalt mixture is widespread in the construction process ofasphalt pavement and not easy to be noticed a phenomenon. Because of the influence oftemperature segregation area of asphalt roadbed compaction degree of the non-uniform, roadsurface roughness is reduced, performance way the void ratio is too large, the early disruptionof asphalt, and also increase the cost of pavement maintenance.From the perspective of preventing temperature segregation, a good fleet configurationscheme should satisfy the requirement of the continuous, stable and balanced construction. Toeffectively control the temperature of the asphalt mixture segregation, this paper, analyzingthe whole construction process of asphalt pavement based on the asphalt pavementconstruction machines configuration theory, using the theory of stochastic service system tothe traditional asphalt pavement construction technology of "mixing, transportation, paving,rolling" fleet with the mathematical model is established. For lorry can intuitive observationof temperature changes in the asphalt mixture in transit, the temperature field simulation byfinite element software ABAQUS, in order to convenient to get to a certain time thetemperature of the asphalt mixture in the lorry and a node’s temperature change curve. Formore effective service to the construction line, using the visual basic programming languageto the established calculation and programming model configuration aircraft, developed asimple operation and visualization of calculation results fast, accurate calculation software.The conclusion is as follows:1. On the basis of the theory of asphalt pavement construction machines configuration,from the research content, logic analysis and the analysis of the engineering validation pointof view adopted random service theory analysis, establishment of construction machinesconfiguration model is feasible and reasonable;2. From the perspective of prevention of temperature segregation, paver to guaranteestable, continuous, on the basis of established a series of construction machines configurationprinciple, late as the prerequisite for dynamic configuration, and by the principle of thenumber of construction equipment, productivity, etc. The basic parameters for the initialconfiguration;3. Using the random service theory of "mixing, transportation, paving, rolling," mostlikely to occur in the temperature loss link-transportation are analyzed in focus, theconfiguration and main equipment of lorry, and dynamic configuration of its number; 4. Through finite element analysis software ABAQUS to transportation within the lorryasphalt mixture temperature in the process of simulation, can be relatively easy to get a part ofthe asphalt mixture temperature and temperature change curve, to evaluate the rationality ofthe construction machines configuration provides a effective way;5. Makes construction machines configuration model is programmed using VB language,has developed a friendly interface, simple operation and accurate visual calculation software,can quickly according to the specific configuration of the construction conditions of thereasonable construction scheme.This thesis research results can be more convenient, fast and accurately according to theconstruction conditions of a specific number of construction equipment, performance, and canreasonable evaluation model of construction quality by the software, for the construction of aline can effectively control the temperature segregation provides the theoretical support andtechnical services. |
