【摘要】 基于陕蒙高速长寿命路面结构组合形式,借助弹性层状体系理论分析沥青层内水平拉应变的变化规律,提出消除或缓和沥青层内水平拉应变曲线驼峰现象的措施.结果表明:当沥青联结层与沥青基层的模量比≥1.5时,沥青层内应变曲线驼峰出现,并且随模量比的增大,驼峰现象加剧.高模量层的存在是沥青层内驼峰现象出现的根本原因.只有当沥青联结层与沥青基层的模量比较接近时,沥青层内应变曲线的驼峰现象才有明显改善.分析结果为长寿命路面结构设计提供了理论基础.更多还原

【Abstract】 Based on the pavement structure of Shaanxi and Inner Mongolia Expressway,tensile strain variation regularity in asphalt layer has been analyzed by elastic multi-layered system theory.The method that can get rid of or release the hunchback of strain curve has also been presented.The results show that high modulus layer was the cause of strain hunchback curve of asphalt layer.When the ratio of intermediate layer modulus to base layer modulus is not less than 1.5,the hunchback of strain curve appears.And hunchback phenomenon is more serious with the ratio of intermediate layer modulus to base layer modulus increasing.Only when the intermediate layer modulus is close to base layer modulus can hunchback phenomena of strain curve be ameliorated.The results can give theoretic reference to the design of the long-life asphalt pavement.更多还原