针对砂砾石过渡料与沥青混凝土所形成的接触面进行了力学特性试验研究。试验结果表明：接触面的抗剪强度与法向应力基本成线性关系；接触面的切向应力应变关系未出现明显的应变软化；接触面剪应力与相对剪切位移呈现出较好的双曲线关系，随着接触面上法向应力的增大，达到峰值强度所需的剪切位移也增大，所形成双曲线的初始段的斜率也增大。将试验所得参数值代入Clough-Duncan非线性弹塑性模型进行拟合，结果表明平均级配和上包线级配砂砾石的剪切应力与剪切位移的试验曲线与拟合曲线的形式整体趋势基本吻合，说明砂砾石过渡料与沥青混凝土所形成的接触面可以用该非线性模型进行模拟。  

 A series of experiments about the mechanical behavoirs of interface between the asphalt - concrete and the aggregate are conducted. It is confirmed that shear strain and the normal stress of this interface are in linear relation, that there are not obviously softening points on the curve of the stress - strain, and that the shear stress and the relative shear displacement present better hyperbola - curve relation. As the normal stress increases, the shear displacement needed to reach the peak strength increases also and the initial slope of the hyperbola - curve is more inclined; when the parameters of the experiments are calculated by the model of Clough - Duncan, it indicates that the experimental curves and the fitting curves of the shear stress and t he shear displacement with the average grade and the higher strength envelope grade are basically coincide, and meanwhile, it indicates that this interface can be analyzed by the above methold.