A theoretical model for total suction effects by tree roots

Pathirage, U; Indraratna, B; Pallewattha, M; Heitor, A

A theoretical model for total suction effects by tree roots

Pathirage, U Indraratna, B

Pallewattha, M Heitor, A

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Publication Type:: Journal Article
Citation:: Environmental Geotechnics, 2016, 6, (6), pp. 353-360
Issue Date:: 2016-05-04

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Field	Value	Language
dc.contributor.author	Pathirage, U
dc.contributor.author	Indraratna, B https://orcid.org/0000-0002-9057-1514
dc.contributor.author	Pallewattha, M
dc.contributor.author	Heitor, A
dc.date.accessioned	2020-04-29T21:43:59Z
dc.date.available	2020-04-29T21:43:59Z
dc.date.issued	2016-05-04
dc.identifier.citation	Environmental Geotechnics, 2016, 6, (6), pp. 353-360
dc.identifier.issn	2051-803X
dc.identifier.issn	2051-803X
dc.identifier.uri	http://hdl.handle.net/10453/140334
dc.description.abstract	© 2019 ICE Publishing: All rights reserved. Strengthening soft and weak soil by way of root reinforcement is a well-known strategy that is adopted worldwide. In Australia, native gum trees remain evergreen throughout the year and have been utilised to stabilise transportation corridors by way of reinforcement provided by the roots and the suction generated within the root domain as a function of evapotranspiration through the canopy. A mature gum tree can induce a missive total suction pressure exceeding 30 MPa through its root water and solute uptake in terms of matric plus osmotic suction. This cumulative effect of matric and osmotic suctions contributes to the overall shear strength of the soil, but the significant osmotic suction is often ignored in classical geotechnical engineering that does not consider the presence of trees. This study is an attempt to demonstrate the important role of osmotic suction, because it is directly proportional to the solute concentration in the soil and the solute uptake mechanisms of the surrounding vegetated ground.
dc.language	en
dc.relation.ispartof	Environmental Geotechnics
dc.relation.isbasedon	10.1680/jenge.15.00065
dc.rights	info:eu-repo/semantics/closedAccess
dc.subject	0905 Civil Engineering, 0907 Environmental Engineering
dc.title	A theoretical model for total suction effects by tree roots
dc.type	Journal Article
utslib.citation.volume	6
utslib.for	0905 Civil Engineering
utslib.for	0905 Civil Engineering
utslib.for	0907 Environmental Engineering
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
pubs.organisational-group	/University of Technology Sydney
utslib.copyright.status	closed_access	*
dc.date.updated	2020-04-29T21:43:57Z
pubs.issue	6
pubs.publication-status	Published
pubs.volume	6
utslib.start-page	353
utslib.citation.issue	6

Abstract:

© 2019 ICE Publishing: All rights reserved. Strengthening soft and weak soil by way of root reinforcement is a well-known strategy that is adopted worldwide. In Australia, native gum trees remain evergreen throughout the year and have been utilised to stabilise transportation corridors by way of reinforcement provided by the roots and the suction generated within the root domain as a function of evapotranspiration through the canopy. A mature gum tree can induce a missive total suction pressure exceeding 30 MPa through its root water and solute uptake in terms of matric plus osmotic suction. This cumulative effect of matric and osmotic suctions contributes to the overall shear strength of the soil, but the significant osmotic suction is often ignored in classical geotechnical engineering that does not consider the presence of trees. This study is an attempt to demonstrate the important role of osmotic suction, because it is directly proportional to the solute concentration in the soil and the solute uptake mechanisms of the surrounding vegetated ground.

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http://hdl.handle.net/10453/140334