subgrade

subgrade Definition

sub·grade (sub′grād′)

noun

a layer of rock or earth leveled and graded for a foundation, as of a road

subgrade Usage Examples

Modifies a noun

stiffness: Scope: The objective of the research was to devise a method for assessing and improving railroad subgrade stiffness without disrupting operational services.

Noun used with modifier

railroad: Scope: The objective of the research was to devise a method for assessing and improving railroad subgrade stiffness without disrupting operational services.
clay: The site had a clay subgrade and demonstrated considerable problems on the heavily loaded up-line, which carried steel freight trains from South Wales.

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