至今世界各国铁路仍主要沿用传统的起道捣固机具,作为整正铁路轨道因在列车重复荷载作用下,而产生的残余变形积累所引起的轨道高低不平顺。英国铁路近年来的试验研究表明,轨道在起道捣固作业完成后,不久又恢复到捣固前的形态,而且起道量与捣固后下沉复原之间存在有一定关系,即起道愈高,则下沉愈大,线路质量状态愈坏,则下沉复原愈快, Up to now, the railroads in the world are still mainly using the traditional tamping tools for starting up the railway. As a result, the track height caused by the accumulated residual deformation caused by the repeated loading of the railway track is not smooth. The experimental studies conducted by the British Railways in recent years show that the orbit was restored to the shape before the tamping soon after the tamping operation of the starting road was completed and that there was a certain relationship between the starting amount and the post-tamping subsidence recovery, The higher, the greater the sink, the worse the line quality status, the faster sinking recovery,