asphalt cemented ballast bed 沥青道床
width of ballast bed 道床宽度
ballast bed finisher 平整道碴机
track on ballast bed 碎石道床轨道
plate ballast bed 板式道床
The measurement parameters include clearance limit for overhead contact wire, ballast bed section, contour of bridge and tunnel, distance of adjacent line, and other clearance size. These parameters play an important role in train safe and rapid running.
线路全断面尺寸的测量是铁路安全高速运行的基础,其主要检测内容包括：接触网高度、道床断面、桥隧涵轮廓、临线间距及其他限界尺寸等,这些参数对于列车能否安全快速运行起着非常重要的作用。
参考来源 - 车载式线路全断面检测系统研究·2,447,543篇论文数据，部分数据来源于NoteExpress
With the standard finite element analysis tension stress appears in the ballast bed in violation of the condition real.
现行的有限元分析方法，得到道床内出现拉应力的分析结果，这与实际情况是相违背的。
In this paper, aiming at the characteristics of urban track traffic, research has been done mainly on support spacing of rail on integrated ballast bed of viaduct.
因此本文针对城市轨道交通的特点，着重对高架桥上整体道床的钢轨支承间距进行研究，计算分析了不同轨枕间距对轨道结构力学特性的影响。
Road bed is the subgrade on which are laid the ballast, ties and rails.
路基就是上面铺着道渣，枕轨和钢轨的底基。
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