Application of an Enhanced Anisotropic Bounding Surface Model in Simulating Deep Excavations in Clays
Publication: Journal of Geotechnical and Geoenvironmental Engineering
Volume 142, Issue 11
Abstract
Finite-element simulations are conducted to assess the capability of an anisotropic bounding surface model in simulating ground response due to deep excavations. The model assumes a nonassociative flow rule that allows for the simulation of not only strain-hardening, but also strain-softening response. It can be degenerated into anisotropic and isotropic forms of the bounding surface model employing associative flow. After integrating the model into a commercial finite-element code, two deep excavation case histories were simulated. The simulation results are compared with published field measurements and with those obtained using the anisotropic Sekiguchi-Ohta and MIT-E3 models. Satisfactory agreement between finite-element simulations and field measurements in terms of lateral wall deflections and ground surface settlements was realized. The difference in results between the nonassociative and associative versions of the anisotropic bounding surface model was found to be rather small given the fact that most parts of the ground likely did not approach failure and did not exhibit softening. Comparing the results obtained from the anisotropic bounding surface model with the Sekiguchi-Ohta and MIT-E3 models indicated a slight difference.
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Published In
Journal of Geotechnical and Geoenvironmental Engineering
Volume 142 • Issue 11 • November 2016
Copyright
© 2016 American Society of Civil Engineers.
History
Received: Apr 8, 2015
Accepted: Mar 4, 2016
Published online: Jul 8, 2016
Published in print: Nov 1, 2016
Discussion open until: Dec 8, 2016
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