Coefficient of Consolidation by Inflection Point Method
Publication: Journal of Geotechnical and Geoenvironmental Engineering
Volume 125, Issue 8
Abstract
The coefficient of consolidation in the Terzaghi theory of consolidation has been commonly determined by fitting the theory to observed compression with time in an incremental loading oedometer test. The Terzaghi theory is applicable to compression and swelling. A similar coefficient governed by horizontal permeability is used in the Barron formulation of consolidation with vertical drains. The most widely used graphical methods of Casagrande and Taylor, which fit the theory to observed data at 50 and 90% primary compression, respectively, are rather laborious. The inflection point method requires only a visual identification of the inflection point on the compression versus log time curve. The values of coefficients of consolidation by the simple inflection point method are quite similar to those from the Casagrande method.
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References
1.
Ali, S. ( 1993). “Engineering properties of undisturbed samples of Boston blue clay,” PhD thesis, University of Illinois at Urbana-Champaign, Ill.
2.
Asaoka, A. (1978). “Observational procedure of settlement prediction.” Soils and Found., 18(4), 87–101.
3.
Casagrande, A., and Fadum, R. E. ( 1940). “Notes on soil testing for engineering purposes.” Publication 268, Graduate School of Engineering, Harvard University, Cambridge, Mass.
4.
Cepeda-Diaz, A. F. ( 1987). “An experimental investigation of the engineering behavior of natural shales,” PhD thesis, University of Illinois at Urbana-Champaign, Ill.
5.
Choi, Y. K. ( 1982). “Consolidation behavior of natural clays,” PhD thesis, University of Illinois at Urbana-Champaign, Ill.
6.
Feng, T. W. ( 1991). “Compressibility and permeability of natural soft clays, and surcharging to reduce settlements,” PhD thesis, University of Illinois at Urbana-Champaign, Ill.
7.
Hayat, T. M. ( 1992). “The coefficient of earth pressure at rest,” PhD thesis, University of Illinois at Urbana-Champaign, Ill.
8.
Mesri, G., and Choi, Y. K. (1985). “Settlement analysis of embankments on soft clays.”J. Geotech. Engrg., ASCE, 111(4), 441–464.
9.
Mesri, G., and Godlewski, P. M. (1977). “Time- and stress-compressibility interrelationship.”J. Geotech. Engrg., ASCE, 103(5), 417–430.
10.
Mesri, G., Lo, D. O. K., and Feng, T. W. (1994). “Settlement of embankments on soft clays.” Proc., of Settlement '94, Geotech. Spec. Publ., ASCE, Reston, Va., 40(1), 8–76.
11.
Mesri, G., Ulrich, C. R., and Choi, Y. K. (1978). “The rate of swelling of overconsolidated clays subjected to unloading.” Géotechnique, 28(3), 281–307.
12.
Robinson, R. G. (1997). “Consolidation analysis by an inflection point method.” Géotechnique, 47(1), 199–200.
13.
Sridharan, A., Murthy, N. S., Prakash, K. (1987). “Rectangular hyberbola method of consolidation analysis.” Géotechnique, 37(3), 355–368.
14.
Taylor, D. W. (1948). Fundamentals of soil mechanics. Wiley, New York.
15.
Terzaghi, K., Peck, R. B., and Mesri, G. (1996). Soil mechanics in engineering practice, 3rd Ed., Wiley, New York.
Information & Authors
Information
Published In
Journal of Geotechnical and Geoenvironmental Engineering
Volume 125 • Issue 8 • August 1999
Pages: 716 - 718
History
Received: Apr 9, 1998
Published online: Aug 1, 1999
Published in print: Aug 1999
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