沥青层底面拉应变的预估及工程应用

Prediction and application of tensile strains of asphalt layer bottom

现行沥青路面设计规范中沥青层底拉应力是设计指标值之一,但在现场沥青层底拉应力却无法检测.沥青路面弯沉盆的理论研究和分析表明,沥青层底拉应变与不同位置的弯沉之间存在着一定关系.因此,在现场测得路面不同位置的弯沉,即可计算得到沥青层底拉应变.根据沥青层底拉应变可评估沥青层的使用寿命.实例说明该方法简便可行.

In current specification for the design of asphalt pavement,tensile strain of asphalt layer bottom is a design index.However,the design index can not be detected in field.Theory research and analysis of deflection bowl show that there is a relationship between tensile strains of asphalt layer bottom and deflections in different positions.For this reason,when the deflections in different positions are detected,the tensile strains of asphalt layer bottom are obtained through calculation.On the basis of the te...