轨下基础 meaning in English

underrail foundation sub-rail foundation sub-rail track bed

This article introduces the construction technology of the new - type foundation under rail for shanghai rail transit pearl line , also puts forward the control standard and the acceptance standard of construction quality
摘要介绍上海市轨道交通明珠线新型整体轨下基础的施工工艺，提出了施工质量控制标准和验收标准。
In order to ensure the quality of filling and the construction stability of the high - speed railway subgrade . " prescription of design of line , bridge , tunnel and station of high - speed railway " regulated that the filling used in the bottom of high - speed railway subgrade must be the type of a , b or improved soil
即将修建的京沪高速铁路对路基的填筑质量要求很高，为了严格控制高速铁路路基的变形，使未来的高速铁路具有一个稳固的轨下基础，适应列车高速运行的要求，《京沪高速铁路线桥隧站设计暂行规定》对高速铁路的基床底层填料性能提出了具体要求，必须使用a 、 b组填料或改良土。