Consolidation and Load Transfer Characteristics of Soft Ground Improved by Combined PVD-SC Column Method Considering Finite Discharge Capacity of PVDs

Nguyen, BP; Nguyen, TT; Le, TT; Mridakh, AH

Consolidation and Load Transfer Characteristics of Soft Ground Improved by Combined PVD-SC Column Method Considering Finite Discharge Capacity of PVDs

Nguyen, BP Nguyen, TT Le, TT Mridakh, AH

Permalink

Publisher:: SPRINGER INDIA
Publication Type:: Journal Article
Citation:: Indian Geotechnical Journal, 2023, 53, (1), pp. 127-138
Issue Date:: 2023-02-01

Closed Access

	Filename	Description	Size
	Consolidation and Load Transfer Characteristics of Soft Ground Improved by Combined PVD-SC Column Method Considering Finite Discharge Capacity of PVDs.pdf	Published version	1.73 MB	Adobe PDF	View/Open

Copyright Clearance Process

Recently Added
In Progress
Closed Access

This item is closed access and not available.

Full metadata record

Field	Value	Language
dc.contributor.author	Nguyen, BP
dc.contributor.author	Nguyen, TT
dc.contributor.author	Le, TT
dc.contributor.author	Mridakh, AH
dc.date.accessioned	2024-01-23T05:13:14Z
dc.date.available	2024-01-23T05:13:14Z
dc.date.issued	2023-02-01
dc.identifier.citation	Indian Geotechnical Journal, 2023, 53, (1), pp. 127-138
dc.identifier.issn	0971-9555
dc.identifier.issn	2277-3347
dc.identifier.uri	http://hdl.handle.net/10453/174879
dc.description.abstract	Prefabricated vertical drains (PVDs) can be installed with soil cement (SC) columns to enhance the efficiency of soft soil improvement. In this combined method, PVDs are first installed and then SC columns are established between the PVDs; this enables a larger spacing between SC columns resulting in a lower construction cost. As an embankment load is applied on composite foundation, time-dependent behavior occurs in the soft soil due to consolidation according to the radial flow toward PVDs, while the corresponding stress transfer takes place between the SC columns and the soft soil. This paper develops an axisymmetric finite element model to analyze the consolidation and stress transfer behaviors of composite foundation, in which an equivalent permeability of subsoil is proposed considering the effects of finite discharge capacity of PVDs. The developed model is applied to an embankment located in China to estimate the settlement of soft ground improved by the combined method. Subsequently, the current numerical model is applied to investigate consolidation characteristics and the stress transfer mechanism of composite foundation. The results show that the consolidation of soils can cause significant effects on the stress transfer process and the stress concentration ratio of the composite ground. The stress concentration mobilizes with the depth over time and stabilizes around the middle of the treated soil when the consolidation time exceeds 50 days. The magnitude of drain discharge capacity also contributes significantly to mobilizing stress concentration in the composite foundation.
dc.language	English
dc.publisher	SPRINGER INDIA
dc.relation.ispartof	Indian Geotechnical Journal
dc.relation.isbasedon	10.1007/s40098-022-00668-2
dc.rights	info:eu-repo/semantics/closedAccess
dc.subject	0905 Civil Engineering
dc.subject.classification	4005 Civil engineering
dc.title	Consolidation and Load Transfer Characteristics of Soft Ground Improved by Combined PVD-SC Column Method Considering Finite Discharge Capacity of PVDs
dc.type	Journal Article
utslib.citation.volume	53
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	*
dc.date.updated	2024-01-23T05:13:12Z
pubs.issue	1
pubs.publication-status	Published
pubs.volume	53
utslib.citation.issue	1

Abstract:

Prefabricated vertical drains (PVDs) can be installed with soil cement (SC) columns to enhance the efficiency of soft soil improvement. In this combined method, PVDs are first installed and then SC columns are established between the PVDs; this enables a larger spacing between SC columns resulting in a lower construction cost. As an embankment load is applied on composite foundation, time-dependent behavior occurs in the soft soil due to consolidation according to the radial flow toward PVDs, while the corresponding stress transfer takes place between the SC columns and the soft soil. This paper develops an axisymmetric finite element model to analyze the consolidation and stress transfer behaviors of composite foundation, in which an equivalent permeability of subsoil is proposed considering the effects of finite discharge capacity of PVDs. The developed model is applied to an embankment located in China to estimate the settlement of soft ground improved by the combined method. Subsequently, the current numerical model is applied to investigate consolidation characteristics and the stress transfer mechanism of composite foundation. The results show that the consolidation of soils can cause significant effects on the stress transfer process and the stress concentration ratio of the composite ground. The stress concentration mobilizes with the depth over time and stabilizes around the middle of the treated soil when the consolidation time exceeds 50 days. The magnitude of drain discharge capacity also contributes significantly to mobilizing stress concentration in the composite foundation.

Please use this identifier to cite or link to this item:

http://hdl.handle.net/10453/174879