2) railway ballast layer
铁路碎石道碴层
1.
The railway ballast layer can be regarded as a highly porous medium,which has good ventilation characteristics.
铁路碎石道碴层能被看作高渗透率的多孔介质,由于其具有较好的通风特性,它的存在改变了寒区铁路路基的顶部热交换条件,对路基温度场产生不可忽视的影响。
3) ballastless track high-speed railway
无碴轨道高速铁路
1.
A data processing method for the precision surveying of ballastless track high-speed railway is put forward:first, choosing the compatible points in the control network by quasi-stable adjustment, then, adjusting the control network with the adjustment model of indirect observation in which the Baarda gross errors detection and Helmert variance component estimation are used.
提出一种适合无碴轨道高速铁路精密工程测量的数据处理方法:先采用拟稳平差选择兼容的起算点,然后应用间接平差模型平差;在平差过程中,用Baarda粗差探测的方法逐个剔除粗差,再用Helmert方差分量估计方法合理地确定边、角的权比。
4) fragment subgrade
道碴路基
1.
On the construction and quality control of road fragment subgrade;
道碴路基的施工及质量控制
5) traditional ballast embankment
传统道碴路基
6) ballast
[英]['bæləst] [美]['bæləst]
道碴
1.
Laboratory experiment study on the ballast and ventilated railway embankment in permafrost regions;
多年冻土区道碴、通风管结构铁路路基室内试验研究
2.
Test and Study on Ballast Elasticity and Accumulated Deformation;
道碴弹性与累积变形的试验研究
3.
Effects of Ballast Thickness on Rail Track Structure;
道碴厚度对轨道结构的影响
补充资料：道碴
1.即道砟。参见"道砟"。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条