考虑碎石基层横观各向同性的沥青路面结构设计

为了分析碎石材料横观各向同性特性对沥青路面结构设计的影响,评价其使用特性,运用状态空间理论,基于横观各向同性层状弹性体系理论解,使用路面结构分析程序ANISOLAY-ER,对基于土基和碎石类材料横观各向同性特性的路面结构设计进行了分析,给出了5种典型沥青路面结构三层体系设计诺谟图,并对一碎石基层沥青路面结构厚度进行了程序化设计。结果表明:在考虑沥青路面关键性设计指标的情况下,对于碎石基层沥青路面结构,沥青层底部拉应变和路表弯沉都普遍比容许值小50%左右,其控制设计指标主要为路基顶部的压应变,车辙为其主要破坏模式。

Structure design of asphalt pavement based on cross-anisotropy of macadam base

In order to analyze the effect of macadam cross-anisotropy on asphalt pavement structure design,and evaluate the performance of asphalt pavement with macadam base,state-space theory was used,cross-anisotropic layered elastic system theory was established,pavement structure analytical program ANISOLAYER was compiled,and asphalt pavement structure designs based on the crossanisotropy of subgrade and macadam base were analyzed.Five common asphalt pavement structures with macadam base were considered,the three-layered nomographs of thickness design for asphalt pavement structure were given,and the program design of asphalt pavement structure was carried out for a typical example.Analytic result shows that AC strains and surface deflections are close to 50% of their permitted values,the compressive strain at the top of subgrade is main critical pavement response,and the rutting is main pavement demolishing model.2 tabs,3 figs,12 refs.