Performance evaluation of railway subballast stabilised with geocell based on pull-out testing

Biabani, MM; Ngo, NT; Indraratna, B

Performance evaluation of railway subballast stabilised with geocell based on pull-out testing

Biabani, MM Ngo, NT Indraratna, B

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Publisher:: ELSEVIER SCI LTD
Publication Type:: Journal Article
Citation:: Geotextiles and Geomembranes, 2016, 44, (4), pp. 579-591
Issue Date:: 2016-08-01

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Field	Value	Language
dc.contributor.author	Biabani, MM
dc.contributor.author	Ngo, NT
dc.contributor.author	Indraratna, B https://orcid.org/0000-0002-9057-1514
dc.date.accessioned	2022-07-28T00:32:02Z
dc.date.available	2022-07-28T00:32:02Z
dc.date.issued	2016-08-01
dc.identifier.citation	Geotextiles and Geomembranes, 2016, 44, (4), pp. 579-591
dc.identifier.issn	0266-1144
dc.identifier.issn	1879-3584
dc.identifier.uri	http://hdl.handle.net/10453/159245
dc.description.abstract	A large-scale apparatus was designed and built at the University of Wollongong to evaluate the pull-out strength of rail subballast reinforced with geocells. A series of tests were carried out to investigate the pull-out resistance, mobilised tensile strength (τtensile) and passive strength (τpassive) of a subballast-geocell assembly under a given range of overburden pressure (1 kPa ≤ q ≤ 45 kPa). The interface was held in a vertical alignment to better simulate the interaction between subballast and geocell in accordance with routine track practices. The test results show that the geocell reinforcement provides a considerable degree of passive resistance, where the opening area (OA) and lateral pressure (σn) over the geocell strip are found to be influential factors. A three-dimensional finite element simulation was also conducted. The numerical results show that the tensile strength mobilised in the geocell will increase as the geocell stiffness increases, but causes a reduction in τpassive. A parametric study was also developed to investigate the impact of geocell stiffness and friction coefficient on the passive resistance and mobilised tensile strength. These results indicate that the passive resistance and mobilised tensile strength increase with the increase in overburden pressure (q) and friction coefficient (δ).
dc.language	English
dc.publisher	ELSEVIER SCI LTD
dc.relation.ispartof	Geotextiles and Geomembranes
dc.relation.isbasedon	10.1016/j.geotexmem.2016.03.006
dc.rights	info:eu-repo/semantics/closedAccess
dc.subject	0905 Civil Engineering, 0915 Interdisciplinary Engineering
dc.subject.classification	Geological & Geomatics Engineering
dc.title	Performance evaluation of railway subballast stabilised with geocell based on pull-out testing
dc.type	Journal Article
utslib.citation.volume	44
utslib.for	0905 Civil Engineering
utslib.for	0915 Interdisciplinary 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	2022-07-28T00:31:56Z
pubs.issue	4
pubs.publication-status	Published
pubs.volume	44
utslib.citation.issue	4

Abstract:

A large-scale apparatus was designed and built at the University of Wollongong to evaluate the pull-out strength of rail subballast reinforced with geocells. A series of tests were carried out to investigate the pull-out resistance, mobilised tensile strength (τtensile) and passive strength (τpassive) of a subballast-geocell assembly under a given range of overburden pressure (1 kPa ≤ q ≤ 45 kPa). The interface was held in a vertical alignment to better simulate the interaction between subballast and geocell in accordance with routine track practices. The test results show that the geocell reinforcement provides a considerable degree of passive resistance, where the opening area (OA) and lateral pressure (σn) over the geocell strip are found to be influential factors. A three-dimensional finite element simulation was also conducted. The numerical results show that the tensile strength mobilised in the geocell will increase as the geocell stiffness increases, but causes a reduction in τpassive. A parametric study was also developed to investigate the impact of geocell stiffness and friction coefficient on the passive resistance and mobilised tensile strength. These results indicate that the passive resistance and mobilised tensile strength increase with the increase in overburden pressure (q) and friction coefficient (δ).

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http://hdl.handle.net/10453/159245