Particular Behaviors of Quasi-Plastic Viscous Elastic Model under Consolidation
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Volume 16, Issue 4
Abstract
Hypothesis A in clay rheology is widely used in practical engineering. It is important to explore its theoretical basis and proper scope of application in practical engineering. To build the relation between Hypotheses A and B, a quasi-plastic viscous concept is defined on the basis of hyperviscoplasticity. An equivalent-time nonlinear rheological model is proven to be one of the elastic quasi-plastic viscous models. From the perspective of the quasi-plastic viscous concept and this model, modified Hypothesis A is proven to be approximately equivalent to Hypothesis B under constant vertical stress in one-dimensional compression when the separation condition is satisfied. The consolidation behavior of clay with large quasi-preconsolidation pressure and vertical drains is numerically analyzed. A new phenomenon is predicted qualitatively and quantitatively in this clay, indicating that the larger the secondary consolidation coefficient is, the higher the degree of consolidation is when the original effective stress, the original void ratio, the original absolute equivalent time, the swelling index, and the compressive index remain constant.
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Acknowledgments
The work was supported by the National Natural Science Foundation of China (Grant No. 51178419); their generous support is gratefully acknowledged.
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International Journal of Geomechanics
Volume 16 • Issue 4 • August 2016
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© 2016 American Society of Civil Engineers.
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Received: Feb 10, 2015
Accepted: Oct 13, 2015
Published online: Jan 22, 2016
Discussion open until: Jun 22, 2016
Published in print: Aug 1, 2016
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