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Geotech Chapter 7: Consolidation
Review of concepts for Geotech Midterm from the 2nd Edition of Fundamentals of Geotechnical Engineering by Braja M Das
8
Civil Engineering
Undergraduate 3
12/12/2010

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Term
Immediate Settlement
Definition
caused by the elastic deformation of dry soil and of moist and saturated soils without any change in the moisture content
Term
Primary Consolidation Settlement
Definition
the result of a volume change in saturated cohesive soils because of the expulsion of water that occupies the void spaces
Term
Secondary Consolidation Settlement
Definition
result of the plastic adjustment of soil fabrics
Term
Over-consolidation Ratio (OCR)
Definition
preconsolidation pressure/present effective vertical pressure
Term
Preconsolidation Pressure
Definition
The historical maximum effective pressure exerted on the soil
Term
Normally Consolidated
Definition
present effective pressure is equal to the preconsolidation pressure
Term
Compression Index (C_c)
Definition
slope of the e-log sig'_0 plot
Term
Swell Index (C_s)
Definition
slope of the unloading curve, soil swells back up after unloading
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