2) closed ballast layer
封闭道碴层
1.
In order to study the cooling effect of the closed ballast layer on permafrost on the Tibetan Plateau,a test field with a closed ballast pit and a gravel surface was built near the Beiluhe test site of the Qinghai-Tibet Railway,and the ground temperatures beneath the test field have been monitored.
为了研究封闭道碴层对其下部多年冻土是否具有积极的保护作用,在青藏铁路北麓河试验段附近建立了封闭碎石道碴坑和卵石地表对比试验场,并对下部地温进行监测。
3) 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。
4) 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
5) ballastless track
无碴轨道
1.
Precisely survey for ballastless track in the passenger dedicated railway line;
客运专线无碴轨道精密定轨测量技术研究
2.
A new method for dynamics modeling of ballastless track;
一种无碴轨道动力学建模的新方法
3.
Influenced of train speed on dynamic characteristics of ballastless track subgrade;
列车速度对无碴轨道路基动力特性的影响
6) tunnel debris
隧道碴
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