Mo, PQ and Yu, HS (2016) Plasticity Solutions of an Undrained Cavity Contraction for the Prediction of Soil Behaviour around Tunnels. In: Geotechnical Special Publications. Fourth Geo-China International Conference (Geo-China 2016), 25-27 Jul 2016, Shandong, China. American Society of Civil Engineers (ASCE) , pp. 150-157.
Abstract
Cavity contraction method has been used for decades for the design of tunneling and the prediction of ground settlement, by modelling the cavity unloading process from the in-situ stress state. Analytical solutions of undrained cavity contraction in a unified state parameter model for clay and sand (CASM) are used in this paper to predict the soil behaviour around tunnels. CASM is a critical state soil model with two additional material constants, which has the ability to capture the overall behaviour of clay and sand under both drained and undrained loading conditions. Large-strain and effective stress analyses of cavity contraction provide the distributions of stress/strain within elastic and plastic regions around tunnels. The effects of ground condition and soil model parameters are investigated from the results of stress paths and cavity contraction curves. Comparisons are also provided between the predicted and measured behaviour of tunneling, using data of centrifuge tunnel test in clay. To account for the effect of free ground surface, Loganathan & Poulos's method using undrained gap parameter is incorporated to estimate tunneling induced ground surface settlement.
Metadata
Item Type: | Proceedings Paper |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | (c) 2016, American Society of Civil Engineers. This is an author produced version of a paper published in Geotechnical Special Publications. Uploaded in accordance with the publisher's self-archiving policy. |
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: | 13 Dec 2017 16:20 |
Last Modified: | 14 Dec 2017 12:23 |
Status: | Published |
Publisher: | American Society of Civil Engineers (ASCE) |
Identification Number: | 10.1061/9780784480038.019 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:125146 |