Modelling of stone columns reinforces railway embankments: Coupled DEM-FDM Analysis

Ngo, T; Indraratna, B; Rujikiatkamjorn, C

Modelling of stone columns reinforces railway embankments: Coupled DEM-FDM Analysis

Ngo, T Indraratna, B

Rujikiatkamjorn, C

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Publisher:: American Society of Civil Engineers (ASCE)
Publication Type:: Conference Proceeding
Citation:: Geotechnical Special Publication, 2023, 2023-March, (GSP 339), pp. 235-245
Issue Date:: 2023-01-01

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Field	Value	Language
dc.contributor.author	Ngo, T
dc.contributor.author	Indraratna, B https://orcid.org/0000-0002-2346-8250
dc.contributor.author	Rujikiatkamjorn, C https://orcid.org/0000-0001-8625-2839
dc.date.accessioned	2023-05-04T03:36:50Z
dc.date.available	2023-05-04T03:36:50Z
dc.date.issued	2023-01-01
dc.identifier.citation	Geotechnical Special Publication, 2023, 2023-March, (GSP 339), pp. 235-245
dc.identifier.isbn	9780784484708
dc.identifier.issn	0895-0563
dc.identifier.uri	http://hdl.handle.net/10453/170190
dc.description.abstract	Stone columns have been increasingly adopted as an environmentally friendly and cost-effective method for stabilizing and reinforcing soft ground embankments. This paper presents a coupled modelling using the discrete element method and continuum modeling approach to study the load-deformation responses of stone columns. In the coupled discrete-continuum model, a soft soil domain under an embankment is simulated by the continuum method (i.e., finite difference method-FDM), while a stone column is simulated by the discrete element method (DEM). A series of interface elements are introduced to facilitate the force-displacement transmission of both domains. The DEM transfers moment and contact forces to the FDM, and then the FDM moves displacements back to the DEM. The model is calibrated and further validated by experimental data. Contact force distributions and shear stress contours developed in the stone column and surrounding clay are captured to provide a better understanding of the load-deformation responses of the stone column from a micromechanical perspective.
dc.language	en
dc.publisher	American Society of Civil Engineers (ASCE)
dc.relation.ispartof	Geotechnical Special Publication
dc.relation.ispartof	Geo-Congress 2023
dc.relation.isbasedon	10.1061/9780784484661.025
dc.rights	info:eu-repo/semantics/openAccess
dc.subject.classification	Geological & Geomatics Engineering
dc.title	Modelling of stone columns reinforces railway embankments: Coupled DEM-FDM Analysis
dc.type	Conference Proceeding
utslib.citation.volume	2023-March
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	open_access	*
dc.date.updated	2023-05-04T03:36:48Z
pubs.issue	GSP 339
pubs.publication-status	Published
pubs.volume	2023-March
utslib.citation.issue	GSP 339

Abstract:

Stone columns have been increasingly adopted as an environmentally friendly and cost-effective method for stabilizing and reinforcing soft ground embankments. This paper presents a coupled modelling using the discrete element method and continuum modeling approach to study the load-deformation responses of stone columns. In the coupled discrete-continuum model, a soft soil domain under an embankment is simulated by the continuum method (i.e., finite difference method-FDM), while a stone column is simulated by the discrete element method (DEM). A series of interface elements are introduced to facilitate the force-displacement transmission of both domains. The DEM transfers moment and contact forces to the FDM, and then the FDM moves displacements back to the DEM. The model is calibrated and further validated by experimental data. Contact force distributions and shear stress contours developed in the stone column and surrounding clay are captured to provide a better understanding of the load-deformation responses of the stone column from a micromechanical perspective.

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http://hdl.handle.net/10453/170190