Clarke, SD, Gilbert, M and Smith, CC (2013) Modelling discrete soil reinforcement in numerical limit analysis. Canadian Geotechnical Journal, 50 (7). 705 - 715 (11). ISSN 0008-3674
Abstract
Soil reinforcement is widely used in geotechnical engineering. While there are various means of accounting for the presence of soil reinforcement in limit analysis and limit equilibrium type calculations, these are often highly problem specific. In this paper a general means of incorporating soil reinforcement within numerical limit analysis calculations is presented. A key feature of this implementation is that the reinforcement is modelled 'in parallel' with the soil model such that allows the soil to flow past the reinforcement as might occur for soil nailing. To illustrate this the Discontinuity Layout Optimization (DLO) numerical analysis procedure is used, and the efficacy of the approach is evaluated via application to reinforced slope problems involving rigid soil nails under plane-strain conditions. The analyses are calibrated against a two-part wedge analysis method such as presented in British Standard BS8006:1995 or AASHTO LRFD Bridge design specifications. It is shown that the DLO-based procedure produces identical results only when the two-part wedge collapse mechanism is prescribed in advance (achieved by artificially strengthening the soil except along predefined failure planes). A more critical mechanism is otherwise predicted, with the soil strength at collapse required to be approximately 10% higher than predicted by the two-part wedge method (or alternatively soil nail lengths required to be approximately 20% greater).
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2013 NRC Research Press. This is an author produced version of a paper subsequently published in Canadian Geotechnical Journal. Uploaded in accordance with the publisher's self-archiving policy. |
Dates: |
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Institution: | The University of Sheffield |
Academic Units: | The University of Sheffield > Faculty of Engineering (Sheffield) > Department of Civil and Structural Engineering (Sheffield) |
Depositing User: | Symplectic Sheffield |
Date Deposited: | 13 Aug 2013 10:58 |
Last Modified: | 15 Sep 2014 03:19 |
Published Version: | http://dx.doi.org/10.1139/cgj-2012-0387 |
Status: | Published |
Publisher: | NRC Research Press |
Identification Number: | 10.1139/cgj-2012-0387 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:75928 |