subgrade


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Related to subgrade: subgrade modulus

subgrade

[′səb‚grād]
(civil engineering)
The soil or rock leveled off to support the foundation of a structure.

subgrade

1. The soil prepared and compacted to support a structure or a pavement system; the base portion of any surfaced area, the elevation of which is lower than that of the finished grade.
2. The elevation of the bottom of a trench in which a sewer or pipeline is laid.
References in periodicals archive ?
In addition, the subgrade under the embankment also has different characteristics.
The overall goal of this study was to demonstrate the benefits of geosynthetics reinforcement and lime stabilization for clayey pavement subgrade with high water content, with the detailed objective of this study being to compare the performance of geocell reinforcement, geotextile reinforcement, and lime stabilization by using these treatments solely and together.
Permeable pavements do not remove chemicals, salts, metals, or nutrients dissolved in the water, except by infiltration into the soil subgrade.
A resulting chart presents thinner subbases at the lower end of a 0-120-day range of exposure to standing water compared to the ICPI standard, which assumes high exposures to saturated subgrades and subbases in all design cases.
Researches of the Engineering Characteristics of Weathered Rock Subgrade Filling
Spain--in is necessary to strengthen sub-ballast layers of subgrade and to achieve uniformity of the parameters of transition zones of different structures;
Runway pavement evaluation starts with subgrade strength, thickness requirement, and quality of pavement structure, and it uses a design procedure pattern to determine the aircraft loading that a pavement can support (International .
Several studies have been conducted to address the applicability of geogrid in flexible pavement with unbound aggregate base and subgrade layers.
Geotechnical exploration or borings will reveal the presence of moisture in the subbase and subgrade, but it also adds costs to the investigation.
The telescopic pipe can be easily adjusted to the subgrade.
Even in dry weather, the subgrade may remain wet or damp indefinitely.