Large-Scale Triaxial Experiments on the Creep Behavior of a Saturated Rockfill Material
Publication: Journal of Geotechnical and Geoenvironmental Engineering
Volume 144, Issue 7
Abstract
Large-scale triaxial compression and creep experiments were conducted with a saturated limestone rockfill material. The relationships between dilatancy ratio and stress ratio during loading and creeping were analyzed. It was found that the dilatancy ratio during both loading and creeping decreased nonlinearly when the stress ratio increased. In addition, the positive dilatancy ratio was considerably higher in creep than in vertical loading under the same stress state. Experimental data also showed that creep strains evolve linearly with the logarithm of time after a certain period, and both the final amounts of creep strains at the end of experiments and their rates are influenced by the stress states. A higher confining pressure and higher deviatoric stress lead to larger creep strains and higher strain rates. Empirical equations relating the final amounts of creep strains and their rates to the stress states are suggested.
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Acknowledgments
This work was supported by the national Natural Science Foundation of China (NSFC) Grant Nos. 51379130 and 51679149. Financial support from the Ministry of Water Resources (MWR) Grant No. 201501035 was also greatly appreciated.
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Published In
Journal of Geotechnical and Geoenvironmental Engineering
Volume 144 • Issue 7 • July 2018
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©2018 American Society of Civil Engineers.
History
Received: Jun 20, 2017
Accepted: Jan 10, 2018
Published online: May 3, 2018
Published in print: Jul 1, 2018
Discussion open until: Oct 3, 2018
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