Title: Mechanics analysis of roads based on the attenuation of the subgrade strength
Abstract: According to structural combinations and overload conditions of semi-rigid asphalt pavement with various subgrade strength,pavement mechanics calculation by Bisar3.0software,mainly analyzing the base bottom tensile stress,surface compressive strain of base course and the pavement deflection are mainly analyzed in order to investigate the influential laws of changes.At the same time,through the analysis of fatigue life at the base course level,the influence of subgrade strength attenuation and the overload on the road durability are obtained.The results show that the fatigue life of the base course without subgrade strength attenuation or overloading is 2.76×106 times of the base course with 60% strength attenuation and 120% overload,which shows that the coaction of subgrade strength attenuation and the overload have a significant influence on the durability of the pavement.Based on the linear regression analysis of load repetition Nf,axle load Pand subgrade strength E0,their relationship is obtained,which can provide directions for the research on the relative mechanical index of the pavement structure.
Publication Year: 2015
Publication Date: 2015-01-01
Language: en
Type: article
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