Also known as formation level
thumb|right|Layers in the construction of a mortarless pavement: A.) Subgrade B.) Subbase (pavement)|Subbase C.) [[Base course D.) Paver base E.) Pavers F.) Fine-grained sand]] 450px|thumb|right|Section through railway track and foundation showing the sub-grade In transport engineering, subgrade is the term used in the US for the native material underneath a constructed road, pavement or railway track (US: railroad track). In British English it is called formation level.
Wikidata facts
- Instance of
- fixed construction
- Part of
- road
Show 1 more fact
- different from
- planum
Sources (3)
via Wikidata · CC0
Article · 中文
路基是一种带状构造物，在铁路和公路中，路基是路面的基础。路基位于路面以下，承受由其传来的行车载荷，对路面起支撑作用。 根据使用条件不同，路基使用土方、石料等材料或混合材料建成。高于原地面的路基称路堤，路堤分为上路堤和下路堤。低于原地面的路基称路堑。
Abstract from DBpedia / Wikipedia · CC BY-SA