Modeling Electroosmosis and Surcharge Preloading Consolidation. I: Model Formulation
Publication: Journal of Geotechnical and Geoenvironmental Engineering
Volume 142, Issue 4
Abstract
A numerical model, EC2, is developed to simulate the consolidation of a soil layer subjected to combined electroosmosis and surcharge preloading. EC2 includes the capabilities of a previous model, EC1, in accounting for large-strain-induced nonlinear changes in the physical and geoelectrical properties that take place on a layer, with the additions of two-dimensional consolidation, coupled loading and electric fields, time-dependent loading and current density, and an external hydraulic gradient. A highlight of the EC2 model is the superposition of multiple streams between small elements, which improves the prediction accuracy of the rate of flow and the degree of consolidation. The consolidation algorithm of EC2 is one-dimensional and conducted using finite-difference and piecewise-linear methods. This paper presents the theoretical and numerical development of the EC2 model. A companion paper presents the validation of the model and the results of simulations that illustrate the optimization of the consolidating processes for some interesting design scenarios.
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Acknowledgments
The authors commenced the study in Hohai University and continued and completed it after the first writer moved to the University of Adelaide. The methodology and computer code in this study were developed under the insights gained from Fox and Berles (1997) and Fox et al. (2003), which are much appreciated. The writers are also thankful to the anonymous reviewers for their comments to improve the paper.
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Published In
Journal of Geotechnical and Geoenvironmental Engineering
Volume 142 • Issue 4 • April 2016
Copyright
© 2015 American Society of Civil Engineers.
History
Received: Jul 16, 2014
Accepted: Aug 12, 2015
Published online: Dec 11, 2015
Published in print: Apr 1, 2016
Discussion open until: May 11, 2016
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