A permafrost test on intact gneiss rock
Changes in permafrost conditions in high mountain rocks have increased the risk of dangerous instabilities. Ice segregation within the rock mass has been interpreted as one of the mechanisms involved in high mountain bedrock degradation. A long term laboratory test on a cube of intact gneiss has bee...
Published in: | International Journal of Rock Mechanics and Mining Sciences |
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Online Access: | http://hdl.handle.net/2117/81089 https://doi.org/10.1016/j.ijrmms.2015.02.003 |
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ftupcatalunyair:oai:upcommons.upc.edu:2117/81089 2023-10-09T21:52:16+02:00 A permafrost test on intact gneiss rock Duca, S Alonso Pérez de Agreda, Eduardo Scavia, Claudio Universitat Politècnica de Catalunya. Departament d'Enginyeria Civil i Ambiental Universitat Politècnica de Catalunya. MSR - Mecànica del Sòls i de les Roques 2015-07 10 p. application/pdf http://hdl.handle.net/2117/81089 https://doi.org/10.1016/j.ijrmms.2015.02.003 eng eng Elsevier http://www.sciencedirect.com/science/article/pii/S1365160915000404 Duca, S., Alonso, E., Scavia, C. A permafrost test on intact gneiss rock. "International journal of rock mechanics and mining sciences", Juliol 2015, vol. 77, p. 142-151. 1365-1609 http://hdl.handle.net/2117/81089 doi:10.1016/j.ijrmms.2015.02.003 http://creativecommons.org/licenses/by-nc-nd/3.0/es/ Open Access Àrees temàtiques de la UPC::Enginyeria civil::Geotècnia::Mecànica de roques Gneiss Ice segregation Laboratory test THM modeling Fracturing Wave propagation SLOPE STABILITY SALINE MEDIA FORMULATION MECHANISMS FRACTURE REGIONS FROZEN CURVE SOILS Roques metamòrfiques Article 2015 ftupcatalunyair https://doi.org/10.1016/j.ijrmms.2015.02.003 2023-09-12T23:08:38Z Changes in permafrost conditions in high mountain rocks have increased the risk of dangerous instabilities. Ice segregation within the rock mass has been interpreted as one of the mechanisms involved in high mountain bedrock degradation. A long term laboratory test on a cube of intact gneiss has been designed to reproduce field temperature gradients and water supply conditions. Test results demonstrate that ice crystallization in a permafrost fringe (T=0 degrees C to -3 degrees C) leads to the formation of continuous ice-filled cracks which explain the loss of rock continuity and the observed rock failures. A coupled thermo-hydro-mechanical model which incorporates the thermodynamics of ice-water mixtures has been used to reproduce test results. The model, which follows existing formulations for unsaturated porous media, was capable of capturing the main observations derived from the experiment. Calculated tensile stresses are close to the gneiss tensile strength. The analysis performed is a step forward in understanding field observations and in the application of computational tools to real cases. (C) 2015 Elsevier Ltd. All rights reserved. Peer Reviewed Postprint (author's final draft) Article in Journal/Newspaper Ice permafrost Universitat Politècnica de Catalunya, BarcelonaTech: UPCommons - Global access to UPC knowledge International Journal of Rock Mechanics and Mining Sciences 77 142 151 |
institution |
Open Polar |
collection |
Universitat Politècnica de Catalunya, BarcelonaTech: UPCommons - Global access to UPC knowledge |
op_collection_id |
ftupcatalunyair |
language |
English |
topic |
Àrees temàtiques de la UPC::Enginyeria civil::Geotècnia::Mecànica de roques Gneiss Ice segregation Laboratory test THM modeling Fracturing Wave propagation SLOPE STABILITY SALINE MEDIA FORMULATION MECHANISMS FRACTURE REGIONS FROZEN CURVE SOILS Roques metamòrfiques |
spellingShingle |
Àrees temàtiques de la UPC::Enginyeria civil::Geotècnia::Mecànica de roques Gneiss Ice segregation Laboratory test THM modeling Fracturing Wave propagation SLOPE STABILITY SALINE MEDIA FORMULATION MECHANISMS FRACTURE REGIONS FROZEN CURVE SOILS Roques metamòrfiques Duca, S Alonso Pérez de Agreda, Eduardo Scavia, Claudio A permafrost test on intact gneiss rock |
topic_facet |
Àrees temàtiques de la UPC::Enginyeria civil::Geotècnia::Mecànica de roques Gneiss Ice segregation Laboratory test THM modeling Fracturing Wave propagation SLOPE STABILITY SALINE MEDIA FORMULATION MECHANISMS FRACTURE REGIONS FROZEN CURVE SOILS Roques metamòrfiques |
description |
Changes in permafrost conditions in high mountain rocks have increased the risk of dangerous instabilities. Ice segregation within the rock mass has been interpreted as one of the mechanisms involved in high mountain bedrock degradation. A long term laboratory test on a cube of intact gneiss has been designed to reproduce field temperature gradients and water supply conditions. Test results demonstrate that ice crystallization in a permafrost fringe (T=0 degrees C to -3 degrees C) leads to the formation of continuous ice-filled cracks which explain the loss of rock continuity and the observed rock failures. A coupled thermo-hydro-mechanical model which incorporates the thermodynamics of ice-water mixtures has been used to reproduce test results. The model, which follows existing formulations for unsaturated porous media, was capable of capturing the main observations derived from the experiment. Calculated tensile stresses are close to the gneiss tensile strength. The analysis performed is a step forward in understanding field observations and in the application of computational tools to real cases. (C) 2015 Elsevier Ltd. All rights reserved. Peer Reviewed Postprint (author's final draft) |
author2 |
Universitat Politècnica de Catalunya. Departament d'Enginyeria Civil i Ambiental Universitat Politècnica de Catalunya. MSR - Mecànica del Sòls i de les Roques |
format |
Article in Journal/Newspaper |
author |
Duca, S Alonso Pérez de Agreda, Eduardo Scavia, Claudio |
author_facet |
Duca, S Alonso Pérez de Agreda, Eduardo Scavia, Claudio |
author_sort |
Duca, S |
title |
A permafrost test on intact gneiss rock |
title_short |
A permafrost test on intact gneiss rock |
title_full |
A permafrost test on intact gneiss rock |
title_fullStr |
A permafrost test on intact gneiss rock |
title_full_unstemmed |
A permafrost test on intact gneiss rock |
title_sort |
permafrost test on intact gneiss rock |
publisher |
Elsevier |
publishDate |
2015 |
url |
http://hdl.handle.net/2117/81089 https://doi.org/10.1016/j.ijrmms.2015.02.003 |
genre |
Ice permafrost |
genre_facet |
Ice permafrost |
op_relation |
http://www.sciencedirect.com/science/article/pii/S1365160915000404 Duca, S., Alonso, E., Scavia, C. A permafrost test on intact gneiss rock. "International journal of rock mechanics and mining sciences", Juliol 2015, vol. 77, p. 142-151. 1365-1609 http://hdl.handle.net/2117/81089 doi:10.1016/j.ijrmms.2015.02.003 |
op_rights |
http://creativecommons.org/licenses/by-nc-nd/3.0/es/ Open Access |
op_doi |
https://doi.org/10.1016/j.ijrmms.2015.02.003 |
container_title |
International Journal of Rock Mechanics and Mining Sciences |
container_volume |
77 |
container_start_page |
142 |
op_container_end_page |
151 |
_version_ |
1779315399173603328 |