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The log delta log t method for the determination of the coefficient of consolidation

Sridharan, A and Prakash, K (1997) The log delta log t method for the determination of the coefficient of consolidation. In: Geotechnical Engineering, 125 (1). pp. 27-32.

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The behaviour of saturated soils undergoing consolidation is very complex, It may not follow Terzaghi's theory over the entire consolidation process, Different soils may behave in such a way as to fit into Terzaghi's theory over some specific stages of the consolidation process (percentage of consolidation), This may be one of the reasons for the difficulties faced by the existing curve-fitting procedures in obtaining the coefficient of consolidation, c(v). It has been shown that the slope of the initial linear portion of the theoretical log U-log T curve is constant over a wider range of degree of consolidation, U, when compared with the other methods in use, This initial well-defined straight line in the log U-log T plot intersects the U = 100% line at T = pi/4, which corresponds to U = 88.3%, The proposed log delta-log t method is based on this observation, which gives the value of c(v) through simple graphical construction, In the proposed method, which is more versatile, identification of the characteristic straight lines is very clear; the intersection of these lines is more precise and the method does not depend upon the initial compression for the determination of c(v).

Item Type: Journal Article
Publication: Geotechnical Engineering
Publisher: Thomas Telford
Additional Information: Copyright of this article belongs to Thomas Telford.
Department/Centre: Division of Mechanical Sciences > Civil Engineering
Date Deposited: 22 Jun 2011 06:40
Last Modified: 22 Jun 2011 06:40
URI: http://eprints.iisc.ac.in/id/eprint/38539

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