Consolidation Behavior of Soils Subjected to Asymmetric Initial Excess Pore Pressure Distributions
Publication: International Journal of Geomechanics
Volume 10, Issue 5
Abstract
Although the consolidation settlements beneath foundations and embankments are rarely one dimensional, Terzaghi’s one-dimensional consolidation theory is often applied to these situations to approximate consolidation behavior. This paper investigates the consolidation behavior of a soil stratum subjected to various initial excess pore pressure distributions which occur under one-dimensional loading. The results show that analysis in terms of average degree of consolidation provides an incomplete representation of the consolidation behavior. While the average degree of consolidation curves for all uniform and linearly varying initial distributions are identical, the degree of consolidation isochrones for each distribution are unique. Furthermore, the application of a bottom-skewed initial excess pore pressure distribution results in a redistribution of pore pressures toward the skewed region so that an increase in excess pore pressure occurs at some depth after consolidation has already commenced. As a result, conventional consolidation relationships are considered inappropriate for these cases, and an alternative method of consolidation analysis in terms of normalized pore pressures is proposed.
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Published In
International Journal of Geomechanics
Volume 10 • Issue 5 • October 2010
Pages: 181 - 189
Copyright
© 2010 ASCE.
History
Received: Aug 24, 2009
Accepted: Feb 18, 2010
Published online: Sep 15, 2010
Published in print: Oct 2010
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