Stress-Strain Behavior of Granular Soils Subjected to Internal Erosion
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Volume 142, Issue 12
Abstract
Internal erosion is a major cause of dam or dike failures and incidents. In this study, laboratory tests were conducted to investigate the deformation of two gap-graded soils during internal erosion and the stress-strain behavior of the soils that experienced loss of fine particles due to internal erosion. An erosion-controlled experimental method was adopted to achieve a designated loss of fine particles during internal erosion by adding a predefined amount of salt into the soil sample during sample preparation and dissolving the salt in water under a controlled stress condition. Both the radial and axial deformations during erosion were measured using a photographic method. Subsequently, drained triaxial compression tests were performed to study the stress-strain behavior of the soils that had lost different amounts of fine particles. The peak friction angle and critical friction angle of the soil decreased with the loss of fine particles. After a significant loss of fine particles, the stress-strain behavior changed from the initially dilative behavior to a more contractive behavior.
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Acknowledgments
This research was substantially supported by the Construction Industry Council Hong Kong (Grant No. CIC15EG02) and the Research Grants Council of Hong Kong SAR (Grants No. C6012-15G and No. T622-603/15-N).
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Published In
Journal of Geotechnical and Geoenvironmental Engineering
Volume 142 • Issue 12 • December 2016
Copyright
© 2016 American Society of Civil Engineers.
History
Received: Sep 9, 2015
Accepted: Apr 19, 2016
Published online: Jul 8, 2016
Published in print: Dec 1, 2016
Discussion open until: Dec 8, 2016
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