Predicting the hydraulic conductivity of frozen coarse-grained soils

Teng, J; Dong, A; Yan, H; Tong, C; Zhang, S

Predicting the hydraulic conductivity of frozen coarse-grained soils

Teng, J Dong, A Yan, H Tong, C

Zhang, S

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Publisher:: ELSEVIER
Publication Type:: Journal Article
Citation:: Journal of Hydrology, 2023, 617
Issue Date:: 2023-02-01

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Field	Value	Language
dc.contributor.author	Teng, J
dc.contributor.author	Dong, A
dc.contributor.author	Yan, H
dc.contributor.author	Tong, C https://orcid.org/0000-0001-5907-2904
dc.contributor.author	Zhang, S
dc.date.accessioned	2024-04-23T00:59:58Z
dc.date.available	2024-04-23T00:59:58Z
dc.date.issued	2023-02-01
dc.identifier.citation	Journal of Hydrology, 2023, 617
dc.identifier.issn	0022-1694
dc.identifier.issn	1879-2707
dc.identifier.uri	http://hdl.handle.net/10453/178232
dc.description.abstract	Hydraulic conductivity is crucial to revealing the mechanisms of frost damage in cold regions, while the hydraulic conductivity of coarse-grained soils during freezing process has rarely been considered. In this study, a new pattern that ice grows from the pore wall is used to describe ice formation in coarse-grained soils. In this pattern, unfrozen water confined in the pore center provides flow channels for liquid water migration. The relationship between distribution characteristics of flow channels and hydraulic conductivity can be established by redefining parameters such as porosity ϕe, hydraulic radius RH¯ and tortuosity Γ in the Kozeny-Carman equation. It thus generates a new hydraulic conductivity model for frozen coarse-grained soils. Comparing with measured result in the literature, it shows that the proposed model gives a better prediction than existing models, especially for sand. The proposed model can provide a useful tool for simulating water-heat transfer process of coarse-grained soils in cold regions.
dc.language	English
dc.publisher	ELSEVIER
dc.relation	National Natural Science Foundation of ChinaU1834206
dc.relation.ispartof	Journal of Hydrology
dc.relation.isbasedon	10.1016/j.jhydrol.2022.129048
dc.rights	info:eu-repo/semantics/closedAccess
dc.subject.classification	Environmental Engineering
dc.title	Predicting the hydraulic conductivity of frozen coarse-grained soils
dc.type	Journal Article
utslib.citation.volume	617
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	2024-04-23T00:59:56Z
pubs.publication-status	Published
pubs.volume	617

Abstract:

Hydraulic conductivity is crucial to revealing the mechanisms of frost damage in cold regions, while the hydraulic conductivity of coarse-grained soils during freezing process has rarely been considered. In this study, a new pattern that ice grows from the pore wall is used to describe ice formation in coarse-grained soils. In this pattern, unfrozen water confined in the pore center provides flow channels for liquid water migration. The relationship between distribution characteristics of flow channels and hydraulic conductivity can be established by redefining parameters such as porosity ϕe, hydraulic radius RH¯ and tortuosity Γ in the Kozeny-Carman equation. It thus generates a new hydraulic conductivity model for frozen coarse-grained soils. Comparing with measured result in the literature, it shows that the proposed model gives a better prediction than existing models, especially for sand. The proposed model can provide a useful tool for simulating water-heat transfer process of coarse-grained soils in cold regions.

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http://hdl.handle.net/10453/178232