Analysis And Experimental Study Asphalt Pavement Graded Gravel Highway Of He Dou

Semi-rigid prone to shrinkage and temperature shrinkage cracks easily cause reflective cracking asphalt surface, and dense semi-rigid material, it is difficult permeable, easy to cause the occurrence of highway early disease. After grading macadam with good drainage and eliminate reflective cracking capabilities and excellent economy been recognized, including graded gravel flexible pavement structure flexible base pavement structure will also become China’s future high-level diversification one of the important structures, based on the above background, the paper graded on graded gravel road design methods and properties were studied.Firstly, the level of Guangxi region macadam base gradation range studied. Combined indoor CBR test, repeated load test and graded gravel rutting test applications and physical engineering, integrated multi-gradation, it is recommended to dynamic stability 1h and 2h indoor rutting test deformation of two indicators as a reference, as Guangxi hot and rainy mountainous highway graded aggregate base rutting performance evaluation criteria. Recommend suitable Guangxi regional macadam base gradation range.Then combined with elastic layer theory, with BISAR3.0 software there are four different highway asphalt pavement structure stress in different months were compared. According mechanical analysis model has been built to analyze the standard axle load under different months in different layers of bottom structure layer tensile stress, and changes in different months of the end of the asphalt layers of maximum tensile stress and semi-rigid layer bottom maximum tensile stress.Finally, the highway construction technology class macadam base summarizes the system proposed is suitable Guangxi highway construction quality graded gravel grassroots control targets, in practical engineering applications have achieved good results.