Analysis of Mechanical Response of Asphalt Pavement with Double-Layer Continuously Paved Cement Stabilized Macadam Base

Abstract

静态层状弹性体系是我国沥青路面结构设计计算及力学响应分析的理论基础，该方法通过路面结构路表弯沉、基层层底拉应变及沥青层层底拉应变的大小来表征路面结构强度。本文通过有限元分析软件，计算了某国道改建工程两种路面结构形式的力学响应情况，计算结果表明：水泥稳定碎石基层采用双层连铺施工工艺比传统三层连铺的路表弯沉、基层层底拉应变和沥青层底拉应变均较小，路面结构抵抗疲劳荷载和协调变形能力更佳。 The static layered elastic system is the theoretical basis for the design calculation and mechanical response analysis of the asphalt pavement structure in our country. This method characterizes the strength of the pavement structure through the surface deflection of the pavement structure, the tensile strain of the base layer and the tensile strain of the asphalt layer. This paper uses finite element analysis software to calculate the mechanical response of the two pavement structures of a national road reconstruction project. The calculation results show that the cement stabilized macadam base layer adopts double-layer continuous paving construction technology than the traditional three-layer continuous paving road surface deflection. The tensile strain at the bottom of the base layer and the tensile strain at the bottom of the asphalt layer are both small, and the pavement structure has better resistance to fatigue loads and coordinated deformation.