1D Constitutive Model for Expansive Soils
Publication: International Journal of Geomechanics
Volume 21, Issue 3
Abstract
Modeling the element behavior of expansive soil with cyclic variations of its water content in stress and time dimensions is a challenging topic. In this paper, a one-dimensional (1D) model will be proposed to provide an estimation of soil deformation. To simplify the model, the effect of suction in an expansive soil will be considered indirectly in the values of the model parameters, and the model parameters will be determined via current testing methods. This paper aims to describe the behavior of unsaturated soil in a relatively simple and pragmatic manner, meanwhile, the model parameters will be determined via methods that engineers are familiar with. The performance of the model will be demonstrated and verified against experimental data for two categories of soil behavior: (1) time-dependent swelling behavior, and (2) stress-induced compression behavior. The practical approach used in this paper could be useful and eventually help to find solutions for some complicated practical problems where the influence of both categories of soil behavior need to be taken into consideration.
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Acknowledgments
The authors would like to express their thanks and appreciation to Dr. Beatrice Baudet for her very valuable comments and suggestion on this paper. The second author acknowledges the Thailand Research Fund (Grant No. RGU6280001) and the Ratchadapisek Sompoch Endowment Fund (2020), Chulalongkorn University (763014 Climate Change and Disaster Management Cluster). The third author acknowledges the National Science and Technology Development Agency under Chair Professor (Grant No. P-19-52303).
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Published In
International Journal of Geomechanics
Volume 21 • Issue 3 • March 2021
Copyright
© 2020 American Society of Civil Engineers.
History
Received: Feb 25, 2020
Accepted: Sep 18, 2020
Published online: Dec 16, 2020
Published in print: Mar 1, 2021
Discussion open until: May 16, 2021
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