铁路轨枕下的道碴下沉会引起线路变形,而修理和更换道床又是一件费工费钱的工作。荷兰Enka公司新技术小组和奥地利Graz大学铁道工程研究所及奥地利联邦铁路共同研制成一种新的轨下基础——加固枕垫(New Rein-forced Sleeperbed),并认为使用枕垫已经解决了沉陷问题。 The ballast subsidence under the railway sleeper can cause the line to deform, and repairing and changing the bed can be a laborious and costly task. A new new under-rail foundation, the Reinforced Sleeperbed, has been developed by a new technology group from Enka, Netherlands, together with the Institute of Railway Engineering at the University of Graz in Austria and the Austrian Federal Railroad and has considered the use of pillows to solve the problem of sinking .