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What is soil settlement?
In geotechnical engineering , settlement is defined as the vertical movement of the ground, generally caused be changes in stresses within the earth. ... Settlement is most likely to occur when increased vertical stresses are applied to the ground on or above soft or loose soil strata.
What is an Overconsolidated soil?
Overconsolidated Soil: A soil that has experienced a vertical effective stress that was. greater than its present vertical effective stress is called an overconsolidated (OC) soil.
What is over consolidation of soil?
Consolidation is the term that refers to slow expulsion of water from the soil mass and decrease in its volume due to some constant applied load. ... A ratio called over-consolidation ratio(OCR) is used to define the consolidation state of soil with respect to past.
What is soil OCR?
The "over-consolidation ratio" (OCR) is defined as the highest stress experienced divided by the current stress. A soil that is currently experiencing its highest stress is said to be "normally consolidated" and has an OCR of one.
What is consolidation settlement in soil?
Clay and Organic soil are most prone to consolidation settlement. Consolidation is the process of reduction in volume due to expulsion of water under an increased load. It is a time related process occurring in saturated soil by draining water from void.
What is elastic settlement?
ELASTIC SETTLEMENT OF FOOTINGS In cases where a loaded area such as a footing for a building, is located on a soil deposit, which may be idealized as an elastic solid, the settlement caused by the load may be calculated by means of the elastic displacement equation.
What is primary consolidation settlement?
Primary Consolidation. It is defined as the process in which the soil volume decreases. ... Here, e 0 is the initial void ratio, c is the consolidation settlement, are the final and initial vertical stress and H is the compressible soil height.
What is settlement in foundation engineering?
Settlement in a structure refers to the distortion or disruption of parts of a building due to. unequal compression of its foundations; shrinkage, such as that which occurs in timber-framed buildings as the frame adjusts its moisture content; or. undue loads being applied to the building after its initial construction.
What is the coefficient of volume compressibility?
coefficient of volume compressibility. The compression of a clay (aquitard) per unit thickness, due to a unit increase of effective stress, in the load range exceeding preconsolidation stress. It is expressed by the equation in which e0 is the initial void ratio. Units are usually cm2/kg .
What is Virgin compression?
Virgin compression. The term 'Virgin compression' as it applies to the area of reclamation can be defined as ' Compression corresponding to stresses greater than the preconsolidation stress'.