High-altitude Areas In Yunnan Asphalt Mixture Performance Simulation

Yunnan,high-altitude areas, belong to the climatic characteristics on humid temperate - cold temperate climate, and the Qinghai-Tibet Plateau belong to semi-arid and dry - cold plateau monsoon climate, its rainfall is much higher than the inghai-Tibet Plateau. Because of different climatic conditions, making it different from the onditions of its roads, and roads in the Qinghai-Tibet Plateau are the main problems facing the permafrost problem, and high-altitude areas in Yunnan there is no permafrost problems, the main roads are seasonal freeze-thaw problem. Question on freezing and thawing, the Yunnan high altitude than the problem of freeze-thaw Freeze-thaw in northern China the problem is serious, mainly reflected in its freeze-thaw for long periods of time (up to 300 days), and the frequent freezing and thawing Change. Therefore, high-altitude areas in Yunnan, and roads, that is, should not apply the relevant construction experience in the Qinghai-Tibet Plateau region, and should not be applied to solve the northern region experience freeze-thaw problem. And must be based on high-altitude areas in Yunnan specific characteristics, targeted research and development of its road construction technology.With the high-altitude areas of Yunnan highway construction development, in recent years because of local reasons for the seasonal freezing and thawing that is, its special climate and environment, making road construction projects arising in the course of questions and use the early phase of situation all the more obvious damage. The current asphalt mixture gradation component design is still a traditional experiment - observe the phenomenon of the experience of study methods, the application of advanced computing tools, mechanical analysis tools, quantitative analysis of micro-or meso-scale asphalt mixture mechanical characteristics on a deep understanding of asphalt mixture mechanical mechanism and improve the composition of asphalt mixture design method has important significance. Current research work in the digital image acquisition and processing technology, virtual mechanics calculation software, and so on fractal principle has been the rapid development of these technologies has been the development of road engineering are very think there is some potential for research and development direction.Because of special geographical and climatic conditions, high-altitude areas in Yunnan Asphalt Pavement more complex than the other, in order to study high-altitude areas in Yunnan special climatic conditions of asphalt mixture mechanical properties, in this paper draw on relevant research results at home and abroad on the basis of combination of high-altitude areas in Yunnan special climatic conditions, set up for asphalt mixture Analog real discrete element model of the interaction of the virtual computer experiments, through the experimental results and numerical simulation results of comparative analysis, the establishment of macro-and micro-parameters of the relationship between. Analysis of laboratory test results at the basis of summing up, in access to scientific data based on theoretical analysis and evaluation...