Mo, P-Q and Yu, H-S (2018) Drained cavity expansion analysis with a unified state parameter model for clay and sand. Canadian Geotechnical Journal, 55 (7). pp. 1029-1040. ISSN 0008-3674
Abstract
This paper presents an analytical solution for drained expansion in both spherical and cylindrical cavities with a unified state parameter model for clay and sand (CASM). The solution developed here provides the stress and strain fields during the expansion of a cavity from an initial to an arbitrary final radius. Small strains are assumed for the elastic region and large strains are applied to soil in the plastic region by using logarithmic strain definitions. Since its development, the unified CASM model has been demonstrated by many researchers to be able to capture the overall soil behaviour for both clay and sand under both drained and undrained loading conditions. In this study, the CASM model is used to model soil behaviour whilst a drained cavity expansion solution is developed with the aid of an auxiliary variable. This is an extension of the undrained solution presented by the authors in 2017. The parametric study investigates the effects of various model constants including the stress-state coefficient and the spacing ratio on soil stress paths and cavity expansion curves. Both London clay and Ticino sand are modelled under various initial stress conditions and initial state parameters. The newly developed analytical solution highlights the potential applications in geotechnical practice (e.g., for the interpretation of cone penetration test data) and also provides useful benchmarks for numerical simulations of cavity expansion problems in critical state soils.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | This article is protected by copyright. All rights reserved. This is an author produced version of a paper published in the Canadian Geotechnical Journal. Uploaded in accordance with the publisher's self-archiving policy. |
Keywords: | cavity expansion analysis; analytical solution; drained analysis; unified state parameter model; cone penetration test |
Dates: |
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Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Engineering & Physical Sciences (Leeds) > School of Civil Engineering (Leeds) |
Depositing User: | Symplectic Publications |
Date Deposited: | 30 Jan 2018 16:13 |
Last Modified: | 16 Jul 2018 14:44 |
Status: | Published |
Publisher: | NRC Research Press |
Identification Number: | 10.1139/cgj-2016-0695 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:126776 |