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在传统式轨道结构中,石碴道床是一个薄弱环节。虽然道床石碴颗粒之间的相互摩擦和动能传播具有一定的粘弹性,但在列车重复荷载的压力和振动影响下,石碴道床的颗粒松散特性所产生的不稳定状态和永久变形的积累,是导致轨道和线路变形的主要原因之一。特别是随着铁路运量的增加、列车轴重和密度的不断增大以及速度的不断提高等,使为保持线路质量的道床养护维修作业日益繁重,而且可用于作业的列车封锁时间愈来愈少愈紧张,工效愈低。因此,加强道床稳定性的研究,已引起许多国家铁路部门的重视,其中关于改变道床
In the traditional track structure, ballast bed is a weak link. Although the mutual friction and kinetic energy transmission between ballast particles in ballast bed have certain viscoelasticity, under the pressure and vibration of train repetitive load, the unstable state and the permanent deformation caused by the loose characteristics of ballast bed, Is one of the main causes of deformation of the track and the line. In particular, with the increase of railway traffic volume, the continuous increase of train axle weight and density and the continuous increase of speed, more and more heavy maintenance work is required on ballast beds to maintain the quality of lines, and more and more railway train lock-up time can be used for operations Less tension, lower efficiency. Therefore, the study of strengthening the stability of ballast bed has drawn the attention of many national railway departments. Among them,