Research On Mechanical Characteristic And Pavement Performance Of Graded Gravel Base Course

The paper master the research situation and the new development home and abroad ofthis problem according a lot of articles. Through many tests and theoretical research,this paper studies the aggregate, soil mixture base mechanics parameter, big and smalltriaxial test for the mixture shear property, the frost destroy mechanism, the factors toits water stability and its inflation with the time, which has an important realitysignificance.Through research the bearing capacity of the aggregate base course with non-linearmodel, and compare this theory with elastic layer system theory. The result show thatthe non-linear theory in this paper has an preferably theory value. The production of thispaper has some reference value to the research of road surface. The research of thispaper has an import reality value in nature aggregate subbase-course. The main contentand result are as following.(1) research on the match and proportion of material basic mechanical parameters:best water content, maximum dry density, shear strength parameters, elastic modulus,compressive strength, CBR value.(2) Stress and compression modulus between presents good a power function relation,can use the power function to return, get back for expression(3) The large and small triaxial test method to determine the grit stone mixture of thestrength parameters. Test obtained the internal friction Angle of present certainregularity, and sticky gathered force is not. Internal friction Angle display that rule is:three axis of the test of the obtained result than small triaxial test result of small3~5°;Whether junior shaft, or small triaxial test, with the content of gravel stones to reduceinternal friction Angle will reduce; Natural distribution in the grit stone mixture than theinternal friction Angle of close-grained distribution in the grit stone mixture slightlygreater than3°.