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道床是轨道的重要组成部分之一,它的基本作用是:(1)均匀传布轨枕荷载于较大的路基面上;(2)提供纵、横向阻力,保持轨道的正常位置;(3)使轨道具有必要的弹性和缓冲性能;(4)碎石道床具有排水和反滤作用。 传统的有碴轨道的特点,决定了轨道的变形主要取决于道床的变形,为了消除轨道几何尺寸超限和残余变形,需要用70～80％的维修
The track bed is one of the important parts of the track. Its basic functions are as follows: (1) uniformly distributing the sleeper load on the large subgrade surface; (2) providing the vertical and horizontal resistance to maintain the normal position of the track; (3) The track has the necessary elasticity and cushioning performance; (4) The ballast bed has the function of drainage and filtration. The characteristics of the traditional ballasted track determine the deformation of the track depends mainly on the deformation of the track bed, in order to eliminate orbital geometry over-size and residual deformation, the need to use 70 to 80% of the maintenance