Hu, N, Shang, X-Y and Yu, H-S (2018) Theoretical Analysis of Pressure-Dependent K₀ for Normally Consolidated Clays Using Critical State Soil Models. International Journal of Geomechanics, 18 (3). 04017159. ISSN 1532-3641
Abstract
The coefficient of earth pressure at rest (K0) for normally consolidated clays increases nonlinearly with increasing consolidation pressure toward a steady value under high pressure rather than remaining constant. Analytical expressions for evaluating pressure-dependent K0 were derived from three representative critical state soil models: modified Cam-clay model (MCC), original Cam-clay model (OCC), and clay and sand model (CASM). In formulations, the authors relaxed a well-adopted assumption that stress ratio is kept constant during one-dimensional (1D) compression. It is found that the constant stress ratio, corresponding to the well-adopted assumption, is essentially a limit value of the stress ratio as predicted by MCC and CASM under high pressure during 1D compression. The predicted relationship between K0 and consolidation pressure is significantly affected by the critical state stress ratio. Without considering the effect of high pressure, the value of K0 may be considerably underestimated. The results predicted by the proposed formula based on CASM agree well with experimental data, showing the capability of this formula for predicting pressure-dependent K0.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2017 American Society of Civil Engineers. This is an author produced version of a paper published in International Journal of Geomechanics. Uploaded in accordance with the publisher's self-archiving policy. |
Keywords: | Clay; Pressure dependent; Critical state soil models; Coefficient of earth pressure at rest. |
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: | 24 Jan 2018 12:16 |
Last Modified: | 25 Jan 2018 06:49 |
Status: | Published |
Publisher: | American Society of Civil Engineers |
Identification Number: | 10.1061/(ASCE)GM.1943-5622.0001075 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:126588 |