Finite Element Analysis of Vacuum Consolidation With Modified Compressibility and Permeability Parameters

Deng, Y; Kan, ME; Indraratna, B; Zhong, R

Finite Element Analysis of Vacuum Consolidation With Modified Compressibility and Permeability Parameters

Deng, Y Kan, ME Indraratna, B

Zhong, R

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Publisher:: Springer
Publication Type:: Journal Article
Citation:: International Journal of Geosynthetics and Ground Engineering, 2017, 3, (2), pp. 1-13
Issue Date:: 2017-06-01

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Field	Value	Language
dc.contributor.author	Deng, Y
dc.contributor.author	Kan, ME
dc.contributor.author	Indraratna, B https://orcid.org/0000-0002-9057-1514
dc.contributor.author	Zhong, R
dc.date.accessioned	2022-09-01T05:08:24Z
dc.date.available	2022-09-01T05:08:24Z
dc.date.issued	2017-06-01
dc.identifier.citation	International Journal of Geosynthetics and Ground Engineering, 2017, 3, (2), pp. 1-13
dc.identifier.issn	2199-9260
dc.identifier.issn	2199-9279
dc.identifier.uri	http://hdl.handle.net/10453/161186
dc.description.abstract	Laboratory tests and case history studies indicate that soil subjected to vacuum preloading may not behave the same as ground treated by traditional surcharge preloading. In detail, soil compression under vacuum pressure is smaller than or equal to that induced by positive pressure with the same magnitude; soil rebound after stopping the vacuum is not as high as after removing the surcharge; and the consolidation rate is usually faster under vacuum pressure than with surcharge preloading. Analysis of vacuum consolidation with existing methods cannot gain all these differences. Thus, in this study, three factors for adjusting compressibility and permeability are proposed based on past laboratory and field results which are used in a finite element analysis of soft soil foundation under vacuum-assisted preloading. This proposed method can be incorporated in existing computer programs associated with classical soil models (e.g., the modified Cam-Clay model and the Soft-Soil model); it is then examined via three distinct simulation scenarios including a laboratory model test and two prototype field cases. The improved accuracy in relation to consolidation by the proposed method is demonstrated and practical ranges for the adjustment factors are discussed.
dc.language	en
dc.publisher	Springer
dc.relation.ispartof	International Journal of Geosynthetics and Ground Engineering
dc.relation.isbasedon	10.1007/s40891-017-0092-8
dc.rights	info:eu-repo/semantics/closedAccess
dc.subject	0905 Civil Engineering
dc.title	Finite Element Analysis of Vacuum Consolidation With Modified Compressibility and Permeability Parameters
dc.type	Journal Article
utslib.citation.volume	3
utslib.for	0905 Civil Engineering
pubs.organisational-group	/University of Technology Sydney
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology/School of Civil and Environmental Engineering
utslib.copyright.status	closed_access	*
pubs.consider-herdc	false
dc.date.updated	2022-09-01T05:08:22Z
pubs.issue	2
pubs.publication-status	Published
pubs.volume	3
utslib.citation.issue	2

Abstract:

Laboratory tests and case history studies indicate that soil subjected to vacuum preloading may not behave the same as ground treated by traditional surcharge preloading. In detail, soil compression under vacuum pressure is smaller than or equal to that induced by positive pressure with the same magnitude; soil rebound after stopping the vacuum is not as high as after removing the surcharge; and the consolidation rate is usually faster under vacuum pressure than with surcharge preloading. Analysis of vacuum consolidation with existing methods cannot gain all these differences. Thus, in this study, three factors for adjusting compressibility and permeability are proposed based on past laboratory and field results which are used in a finite element analysis of soft soil foundation under vacuum-assisted preloading. This proposed method can be incorporated in existing computer programs associated with classical soil models (e.g., the modified Cam-Clay model and the Soft-Soil model); it is then examined via three distinct simulation scenarios including a laboratory model test and two prototype field cases. The improved accuracy in relation to consolidation by the proposed method is demonstrated and practical ranges for the adjustment factors are discussed.

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http://hdl.handle.net/10453/161186