difference between compaction and consolidation of soil pdf

Difference Between Compaction And Consolidation Of Soil Pdf

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What is the difference between compaction grouting and fracture grouting?

In geotechnical engineering , soil compaction is the process in which stress applied to a soil causes densification as air is displaced from the pores between the soil grains. When stress is applied that causes densification due to water or other liquid being displaced from between the soil grains, then consolidation , not compaction, has occurred. Normally, compaction is the result of heavy machinery compressing the soil , but it can also occur due to the passage of, for example, animal feet. In soil science and agronomy , soil compaction is usually a combination of both engineering compaction and consolidation, so may occur due to a lack of water in the soil, the applied stress being internal suction due to water evaporation [1] as well as due to passage of animal feet. Affected soils become less able to absorb rainfall , thus increasing runoff and erosion. Plants have difficulty in compacted soil because the mineral grains are pressed together, leaving little space for air and water, which are essential for root growth. Burrowing animals also find it a hostile environment, because the denser soil is more difficult to penetrate.

What are the differences among consolidation, compression and. Angular distortion between two points under a structure is equal, to the differential settlement between the points divided by the distance between them. It is the difference of settlement between various locations of the structure. Consolidationstarts afterconstruction of structure 3 soil experiences dynamicloadingforvolume. This broader definition encompasses the overall concept of soil compaction, subsidence, and heave.

Difference Between Compaction and Consolidation of Soil

A review is made of published evidence on the physical properties of unsaturated and compacted clays with the object of recognising the more important factors affecting the consolidation process in such soils. An attempt is then made to formulate and solve a set of general equations to describe the consolidation process. Because of the complexity of these equations it is found desirable to sub-divide the process into a number of less general treatments, each being relevant to a particular range of saturation values. The treatments include the effects of decreasing permeability and a compressible pore fluid, and the resulting non-linear partial differential equations are solved by finite difference approximations on a digital computer. The computed results exhibit the two important characteristics found in consolidation tests on unsaturated clay, viz.

Fowler, C. A 3-D theory of groundwater flow and consolidation that allows for compressibility of the soil or sediment matrix is that due to Biot However, this theory is inapplicable to virgin consolidation tests, where the deformation of the soil along the critical state surface is accomplished by elastic—plastic flow. In fact, Biot's model cannot even be applied to overconsolidated soils where the deformation is elastic, as it does not conserve the mass of the solid. In this paper, we provide a modified version of the model, and show how it can be extended to allow for elastic—plastic deformation and large-amplitude deformations in elastic—plastic compaction. A particular example of the potential application of this theory is to the groundwater flow induced by the compaction of sediments by an overriding ice sheet, and we show how the commonly used Dupuit approximation can be employed to simplify the theory.

Textbook: Consolidation of Soils - Testing and Evaluation

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Difference between compaction and consolidation of soil pdf

All Rights Reserved. The occurrence and distribution of soils in nature varies from location to location. The type of soil depends on the rock type, its mineral constituents and the climatic regime of the area. Soils are used as construction materials or the civil engineering structures are founded in or on the surface of the earth. Geotechnical properties of soils influence the stability of civil engineering structures. Most of the geotechnical properties of soils influence to each other. In this paper, different geotechnical properties of soils such as specific gravity, density index, consistency limits, particle size analysis, compaction, consolidation, permeability and shear strength and their interactions and applications for the purpose of civil engineering structures have been discussed.

The term consolidation describes the process by which a soil mass decreases in volume in response to either natural or man-made loadings. Natural loadings that induce consolidation result from geological processes such as sedimentation. Man-induced consolidation is a result of surface loadings associated with the construction of buildings or soil embankments and of subsurface load changes associated with underground excavations and the extraction of subsurface fluids see Vol.

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Differences between compaction and consolidation process of Soil mass

Compaction Compaction purposes and processes Compaction as a construction process Objectives of compaction Factors affecting compaction Types of compaction plant Compaction is a process of increasing soil density and removing air, usually by mechanical means. The size of the individual soil particles does not change, neither is water removed. Purposeful compaction is intended to improve the strength and stiffness of soil. Consequential or accidental compaction, and thus settlement, can occur due to vibration piling, traffic, etc. Compaction purposes and processes.

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WHAT IS THE DIFFERENCE BETWEEN SOIL COMPACTION AND CONSOLIDATION?

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Compaction vs. Consolidation of Soils

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2 comments

Summer P.

Consolidation is a natural process where soil below the building and other structure compacted by the transferred load to the soil through the provided foundation.

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