Performance of Composite PVD-SC Column Foundation under Embankment through Plane-Strain Numerical Analysis

Nguyen, BP; Nguyen, TT; Nguyen, THY; Tran, TD

Performance of Composite PVD-SC Column Foundation under Embankment through Plane-Strain Numerical Analysis

Nguyen, BP Nguyen, TT Nguyen, THY Tran, TD

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Publisher:: American Society of Civil Engineers (ASCE)
Publication Type:: Journal Article
Citation:: International Journal of Geomechanics, 2022, 22, (9), pp. 04022155
Issue Date:: 2022-09-01

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Field	Value	Language
dc.contributor.author	Nguyen, BP
dc.contributor.author	Nguyen, TT
dc.contributor.author	Nguyen, THY
dc.contributor.author	Tran, TD
dc.date.accessioned	2023-04-11T03:32:49Z
dc.date.available	2023-04-11T03:32:49Z
dc.date.issued	2022-09-01
dc.identifier.citation	International Journal of Geomechanics, 2022, 22, (9), pp. 04022155
dc.identifier.issn	1532-3641
dc.identifier.issn	1943-5622
dc.identifier.uri	http://hdl.handle.net/10453/169543
dc.description.abstract	The combination of soil-cement (SC) columns and prefabricated vertical drains (PVDs) has indicated great success in improving ground stabilization in recent years; however, there is a lack of proper plane-strain numerical modeling to detail the role of PVDs in improving the performance of the SC column method. This study thus presents a numerical analysis of soft soil ground improved by the coupled PVD-SC column method based on a proposed equivalent plane-strain model considering the combined effects of PVDs and SC columns in the ground. The model is verified by applying it to a test embankment where long PVDs were installed in soft soil in combination with floating SC columns. To investigate the role of PVDs in the composite foundation, the numerical analysis is then conducted for two cases, with and without PVDs. The effects of discharge capacity of PVDs on the SC column behavior are also examined. The results show that the PVDs significantly improve performance of the composite foundation as they considerably reduce both postconstruction settlement and lateral displacement, while increasing the efficiency of soil arching and the bending moment capacity in SC columns. The numerical results obtained from the proposed model are in good agreement with the field data. The current study also shows that the discharge capacity of PVDs should be larger than 20 m3/year to enhance the positive influence of PVDs on the entire performance of the composite foundation.
dc.language	en
dc.publisher	American Society of Civil Engineers (ASCE)
dc.relation.ispartof	International Journal of Geomechanics
dc.relation.isbasedon	10.1061/(ASCE)GM.1943-5622.0002494
dc.rights	info:eu-repo/semantics/closedAccess
dc.subject	0905 Civil Engineering, 0914 Resources Engineering and Extractive Metallurgy
dc.subject.classification	General Mathematics
dc.title	Performance of Composite PVD-SC Column Foundation under Embankment through Plane-Strain Numerical Analysis
dc.type	Journal Article
utslib.citation.volume	22
utslib.for	0905 Civil Engineering
utslib.for	0914 Resources Engineering and Extractive Metallurgy
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	*
dc.date.updated	2023-04-11T03:32:48Z
pubs.issue	9
pubs.publication-status	Published
pubs.volume	22
utslib.citation.issue	9

Abstract:

The combination of soil-cement (SC) columns and prefabricated vertical drains (PVDs) has indicated great success in improving ground stabilization in recent years; however, there is a lack of proper plane-strain numerical modeling to detail the role of PVDs in improving the performance of the SC column method. This study thus presents a numerical analysis of soft soil ground improved by the coupled PVD-SC column method based on a proposed equivalent plane-strain model considering the combined effects of PVDs and SC columns in the ground. The model is verified by applying it to a test embankment where long PVDs were installed in soft soil in combination with floating SC columns. To investigate the role of PVDs in the composite foundation, the numerical analysis is then conducted for two cases, with and without PVDs. The effects of discharge capacity of PVDs on the SC column behavior are also examined. The results show that the PVDs significantly improve performance of the composite foundation as they considerably reduce both postconstruction settlement and lateral displacement, while increasing the efficiency of soil arching and the bending moment capacity in SC columns. The numerical results obtained from the proposed model are in good agreement with the field data. The current study also shows that the discharge capacity of PVDs should be larger than 20 m3/year to enhance the positive influence of PVDs on the entire performance of the composite foundation.

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http://hdl.handle.net/10453/169543