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级配碎石可有效阻断地下毛细水上升、改善路基的温湿状况,并具有良好的应力消散作用,但应力依赖特性显著,其模量随其结构应力水平而变化。基于旧路加铺路面结构力学分析,研究了级配碎石沥青路面结构应力水平随半刚性基层厚度、沥青层厚度、路基模量、半刚性基层模量和沥青层模量的变化,推荐了各影响参数的取值,基于结构应力分析与级配碎石重复加载动三轴试验,提出了旧路加铺改建路面结构设计要点,为级配碎石模量参数、结构力学分析和旧路加铺改造设计提供依据。
Graded gravel can effectively block the rise of underground capillary water to improve the subgrade’s temperature and humidity conditions, and has good stress dissipation, but the stress-dependent characteristics of significant, its modulus changes with the structural stress level. Based on the mechanics analysis of the paved pavement structure of the old road, the change of the stress level of the graded broken asphalt pavement structure with the thickness of the semi-rigid base layer, the thickness of the asphalt layer, the subgrade modulus, the semi-rigid base layer modulus and the asphalt layer modulus Based on the analysis of structure stress and repeated loading triaxial tests of graded gravel, the main points of structural design of old pavement reconstruction pavement are proposed, which are the parameters of graded gravel modulus, structural mechanics analysis and old road Additional design to provide the basis for renovation.