Mo, P, Gao, X, Yang, W et al. (1 more author) (2020) A cavity expansion–based solution for interpretation of CPTu data in soils under partially drained conditions. International Journal for Numerical and Analytical Methods in Geomechanics, 44 (7). pp. 1053-1076. ISSN 0363-9061
Abstract
A cavity expansion–based solution is proposed in this paper for the interpretation of CPTu data under a partially drained condition. Variations of the normalized cone tip resistance, cone factor, and undrained‐drained resistance ratio are examined with different initial specific volume and overconsolidation ratio, based on the exact solutions of both undrained and drained cavity expansion in CASM, which is a unified state parameter model for clay and sand. A drainage index is proposed to represent the partially drained condition, and the critical state after expansion and stress paths of cavity expansion are therefore predicted by estimating a virtual plastic region and assuming a drainage‐index–based mapping technique. The stress paths and distributions of stresses and specific volume are investigated for different values of drainage index, which are also related to the penetration velocity with comparisons of experimental data and numerical results. The subsequent consolidation after penetration is thus predicted with the assumption of constant deviatoric stress during dissipation of the excess pore pressure. Both spherical and cylindrical consolidations are compared for dissipation around the cone tip and the probe shaft, respectively. The effects of overconsolidation ratio on the stress paths and the distributions of excess pore pressure and specific volume are then thoroughly investigated. The proposed solution and the findings would contribute to the interpretation of CPTu tests under a random drained condition, as well as the analysis of pile installation and the subsequent consolidation.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2020 John Wiley & Sons, Ltd.. This is the peer reviewed version of the following article: Mo, P‐Q, Gao, X‐W, Yang, W, Yu, H‐S. A cavity expansion–based solution for interpretation of CPTu data in soils under partially drained conditions. Int J Numer Anal Methods Geomech. 2020; 44: 1053– 1076. https://doi.org/10.1002/nag.3050 , which has been published in final form at https://doi.org/10.1002/nag.3050. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions. Uploaded in accordance with the publisher's self-archiving policy. |
Keywords: | CPTu; cavity expansion method; excess pore pressure; partially drained condition |
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 Mar 2020 10:47 |
Last Modified: | 06 Feb 2021 01:39 |
Status: | Published |
Publisher: | Wiley |
Identification Number: | 10.1002/nag.3050 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:158270 |