Modelling Bio-geochemical Clogging affecting Piezometers in Acid Sulfate Soil Terrain

Athuraliya, S; Indraratna, B; Medawela, S; Rowe, RK; Thamwattana, N

Modelling Bio-geochemical Clogging affecting Piezometers in Acid Sulfate Soil Terrain

Athuraliya, S Indraratna, B Medawela, S Rowe, RK Thamwattana, N

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Publisher:: Canadian Science Publishing
Publication Type:: Journal Article
Citation:: Canadian Geotechnical Journal

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Field	Value	Language
dc.contributor.author	Athuraliya, S
dc.contributor.author	Indraratna, B
dc.contributor.author	Medawela, S
dc.contributor.author	Rowe, RK
dc.contributor.author	Thamwattana, N
dc.date.accessioned	2023-05-15T11:05:20Z
dc.date.available	2023-05-15T11:05:20Z
dc.identifier.citation	Canadian Geotechnical Journal
dc.identifier.issn	0008-3674
dc.identifier.issn	1208-6010
dc.identifier.uri	http://hdl.handle.net/10453/170341
dc.description.abstract	<jats:p> This study offers an analytical solution for radial consolidation that captures the bio-geochemical clogging effect in acid sulfate soils. Field sites and personal communication with industry practitioners have provided evidence of piezometers exhibiting retarded pore pressure readings that do not follow conventional soil consolidation and seepage principles when installed in coastal acidic floodplains. This retarded response together with a variation in pH, ion concentrations, and piezometric heads provided evidence of clogging at and around the piezometers. This paper uses the proposed bio-geochemical clogging model, which is an analytically derived system of equations to estimate the excess pore water pressure (EPWP) dissipation of piezometers installed in clogging-prone acid sulfate soils. The inclusion of the total porosity reduction attributed to biological and geochemical clogging improves the predictions of the retarded dissipation of excess pore pressure, especially after about 1 year. This method is validated for two previously identified acidic field sites in coastal Australia, where piezometers measured a very slow rate of dissipation. It is concluded that this model has potential to accurately monitor the performance of critical infrastructure such as dams and embankment foundations built on acidic terrain. </jats:p>
dc.language	en
dc.publisher	Canadian Science Publishing
dc.relation.ispartof	Canadian Geotechnical Journal
dc.relation.isbasedon	10.1139/cgj-2023-0004
dc.rights	info:eu-repo/semantics/closedAccess
dc.subject	0905 Civil Engineering, 0907 Environmental Engineering
dc.subject.classification	Geological & Geomatics Engineering
dc.title	Modelling Bio-geochemical Clogging affecting Piezometers in Acid Sulfate Soil Terrain
dc.type	Journal Article
utslib.for	0905 Civil Engineering
utslib.for	0907 Environmental 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	2023-05-15T11:05:18Z
pubs.publication-status	Published online

Abstract:

This study offers an analytical solution for radial consolidation that captures the bio-geochemical clogging effect in acid sulfate soils. Field sites and personal communication with industry practitioners have provided evidence of piezometers exhibiting retarded pore pressure readings that do not follow conventional soil consolidation and seepage principles when installed in coastal acidic floodplains. This retarded response together with a variation in pH, ion concentrations, and piezometric heads provided evidence of clogging at and around the piezometers. This paper uses the proposed bio-geochemical clogging model, which is an analytically derived system of equations to estimate the excess pore water pressure (EPWP) dissipation of piezometers installed in clogging-prone acid sulfate soils. The inclusion of the total porosity reduction attributed to biological and geochemical clogging improves the predictions of the retarded dissipation of excess pore pressure, especially after about 1 year. This method is validated for two previously identified acidic field sites in coastal Australia, where piezometers measured a very slow rate of dissipation. It is concluded that this model has potential to accurately monitor the performance of critical infrastructure such as dams and embankment foundations built on acidic terrain.

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http://hdl.handle.net/10453/170341