Re‐Analysis of Deep Excavation Collapse Using a Generalized Effective Stress Soil Model
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ER2010-gcajw.pdf
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1.18 MB
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23500cc2b73b3e5d99293be4dd08790b
Author(s)
Corral, Gonzalo
Whittle, Andrew
Date Issued
August 2010
Journal
Earth Retention Conference 3, Proceedings of the 2010 Earth Retention Conference
Publisher
American Society of Civil Engineers
Citation
Corral, Gonzalo, and Andrew J. Whittle. “Re-Analysis of Deep Excavation Collapse Using a Generalized Effective Stress Soil Model.” in Earth Retention Conference 3, Proceedings of the 2010 Earth Retention Conference, 1-4 August 2010, Bellevue, WA., USA. (Geotechnical Special Publications ; GSP 208)
Version
Author's final manuscript
Abstract
This paper re‐analyzes the well‐documented failure of a 30m deep braced excavation in underconsolidated marine clay using an advanced effective stress soil model (MIT‐E3). The collapse of the Nicoll Highway during construction of cut‐and cover tunnels for the new Circle Line in Singapore has been extensively investigated and documented. All prior analyses of the collapse have relied on simplified soil models with undrained strength parameters based on empirical correlations and piezocone penetration data. The current analysis use results from high quality consolidation and undrained triaxial shear tests that were only available after completion of the public inquiry. The current analyses achieve very reasonable estimates of measured wall deflections and strut loads using model parameters derived directly from the laboratory tests. The analyses confirm prior interpretations of the failure mechanism but provide a more rational basis for the modeling of soil‐structure interaction.
MIT Department
Massachusetts Institute of Technology. Department of Civil and Environmental Engineering
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Creative Commons Attribution-Noncommercial-Share Alike 3.0
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DOI of Published Version
https://doi.org/10.1061/41128(384)72
