混凝土轨枕线路是用刚度大的混凝土轨枕代替弹性好的木枕。混凝土轨枕线路的弹性主要由轨下弹性垫层和道床提供。因此,当道床材质和厚度一定时,作为整个轨道结构,其弹性能否满足列车运行的需要,关键是弹性垫层的材质及厚度。目前,我国普通橡胶垫层的弹 Concrete sleeper line is a rigid concrete sleeper instead of a good elastic wooden pillow. The elasticity of the concrete sleeper line is mainly provided by the under-rail elastic cushion and the ballast bed. Therefore, when the material and thickness of the track bed are constant, the elasticity of the track structure as a whole track structure can meet the needs of train operation. The key point is the material and thickness of the elastic cushion layer. At present, China’s ordinary rubber cushion shells