Validation of Coupled Simulation of Excavations in Saturated Clay: Camboinhas Case History
Publication: International Journal of Geomechanics
Volume 11, Issue 3
Abstract
This paper presents the results of an elastoplastic finite-element back analysis of an excavation made on a saturated soft organic clay deposit in Rio de Janeiro, Brazil. The excavation was conducted as part of an urbanization program, in which artificial islands were to be created in a swamp along the margins of the Camboinhas Lagoon. An extensive laboratory testing program was performed on undisturbed soil samples to characterize the stress-strain-strength behavior of the involved materials. Results from this laboratory testing program were used to calibrate a nonassociated elastoplastic constitutive model implemented in the ANLOG (Nonlinear Analysis of Geotechnical Problems) code. This code is based on the finite-element method and is capable of conducting fully coupled analyses by using a variety of constitutive models. Coupled analyses were performed to simulate the Camboinhas excavation, which was conducted under plane strain condition. Field measurements of both displacements and pore-water pressures obtained during the excavation are compared with the results of the numerical simulation. Analyses of the results show that monitored in situ and numerical results are in good agreement.
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Acknowledgments
The writers are grateful for the financial support received by the first writer from CAPES (Coordinating Agency for Advanced Training of High-Level Personnel—Brazil). They also acknowledge Prof. John P. White and Harriet K. Reis for their editorial review.
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Information
Published In
International Journal of Geomechanics
Volume 11 • Issue 3 • June 2011
Pages: 202 - 210
Copyright
© 2011 American Society of Civil Engineers.
History
Received: Dec 17, 2009
Accepted: Jul 1, 2010
Published online: Jul 30, 2010
Published in print: Jun 1, 2011
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