Unconfined compression tests on anisotropic frozen soils from Thompson, Manitoba
Laminated frozen soils, consisting of alternate horizontal layers of dark brown clay and light brown silt, with ice lenses between the layers, are found in the northern area of ancient glacial Lake Agassiz. Laboratory tests confirmed the results of in situ ground anchor, penetrometer, and pressureme...
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1983
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ftnrccanada:oai:cisti-icist.nrc-cnrc.ca:cistinparc:20386482 2024-09-15T18:11:41+00:00 Unconfined compression tests on anisotropic frozen soils from Thompson, Manitoba Baker, T. H. W. Johnston, G. H. 1983 text https://nrc-publications.canada.ca/eng/view/ft/?id=e4fb42b8-2420-4f5a-b61c-0fea3d772019 https://nrc-publications.canada.ca/eng/view/object/?id=e4fb42b8-2420-4f5a-b61c-0fea3d772019 https://nrc-publications.canada.ca/fra/voir/objet/?id=e4fb42b8-2420-4f5a-b61c-0fea3d772019 eng eng Permafrost. 4th International Conference, Proceedings, Permafrost: 4th International Conference, July 17, 1983, Fairbanks, Alaska, United States, ISBN: 0-309-03435-3, Publication date: 1983, Pages: 40–45 report_number:DBR-P-1168 permafrost pergélisol soils sol (terre) frozen soils sol gelé creep fluage anisotropy anisotropie compression tests essai de compression properties of soils caractéristique du sol laminated frozen soils clay silt ice lenses ancient glacial lake agassiz ground anchor penetrometer pressuremeter tests article 1983 ftnrccanada 2024-08-05T14:05:07Z Laminated frozen soils, consisting of alternate horizontal layers of dark brown clay and light brown silt, with ice lenses between the layers, are found in the northern area of ancient glacial Lake Agassiz. Laboratory tests confirmed the results of in situ ground anchor, penetrometer, and pressuremeter tests performed at Thompson, Manitoba, which showed these soils to be stronger in the horizontal direction, parallel to the layers, than in the vertical direction. Undisturbed block samples of these laminated ( varved) frozen soils were obtained and test specimens were prepared at various orientations to the direction of layering. Unconfined compression tests, using both naturally frozen and remolded frozen specimens, have shown the extent of strength anisotropy due to the natural anisotropic soil structure. On trouve dans la partie nord de l'ancien lac glaciaire Agassiz des sols gelés laminés, constitués de couches alternées horizontales d'argile brun sombre et de limon brun clair, entre lesquelles sont intercalées des lentilles de glace. Des essais conduits en laboratoire ont confirmé les résultats des essais in situ avec ancrages au sol, pénétromè tres et capsules manométriques à Thompson, au Manitoba. Ces essais avaient démontré que les sols présentaient une meilleure résistance mécanique dans le sens horizontal, parallèlement aux couches, que dans le sens vertical. On a échantillonné des blocs non perturbés de ces sols gelés laminés (à varves), et préparé des éprouvettes, orientées de facons diverses par rapport à la direction de la stratification. Des essais de résistance à la compression sans étreinte latérale, effectués sur des échantillons naturellement gelés, et sur d'autres remaniés et artificiellement gelés, ont démontré l'importante anisotropie de la résistance mécanique due à l'anisotropie naturelle de la structure du sol. Peer reviewed: Yes NRC publication: Yes Article in Journal/Newspaper Ice permafrost pergélisol National Research Council Canada: NRC Publications Archive |
institution |
Open Polar |
collection |
National Research Council Canada: NRC Publications Archive |
op_collection_id |
ftnrccanada |
language |
English |
topic |
permafrost pergélisol soils sol (terre) frozen soils sol gelé creep fluage anisotropy anisotropie compression tests essai de compression properties of soils caractéristique du sol laminated frozen soils clay silt ice lenses ancient glacial lake agassiz ground anchor penetrometer pressuremeter tests |
spellingShingle |
permafrost pergélisol soils sol (terre) frozen soils sol gelé creep fluage anisotropy anisotropie compression tests essai de compression properties of soils caractéristique du sol laminated frozen soils clay silt ice lenses ancient glacial lake agassiz ground anchor penetrometer pressuremeter tests Baker, T. H. W. Johnston, G. H. Unconfined compression tests on anisotropic frozen soils from Thompson, Manitoba |
topic_facet |
permafrost pergélisol soils sol (terre) frozen soils sol gelé creep fluage anisotropy anisotropie compression tests essai de compression properties of soils caractéristique du sol laminated frozen soils clay silt ice lenses ancient glacial lake agassiz ground anchor penetrometer pressuremeter tests |
description |
Laminated frozen soils, consisting of alternate horizontal layers of dark brown clay and light brown silt, with ice lenses between the layers, are found in the northern area of ancient glacial Lake Agassiz. Laboratory tests confirmed the results of in situ ground anchor, penetrometer, and pressuremeter tests performed at Thompson, Manitoba, which showed these soils to be stronger in the horizontal direction, parallel to the layers, than in the vertical direction. Undisturbed block samples of these laminated ( varved) frozen soils were obtained and test specimens were prepared at various orientations to the direction of layering. Unconfined compression tests, using both naturally frozen and remolded frozen specimens, have shown the extent of strength anisotropy due to the natural anisotropic soil structure. On trouve dans la partie nord de l'ancien lac glaciaire Agassiz des sols gelés laminés, constitués de couches alternées horizontales d'argile brun sombre et de limon brun clair, entre lesquelles sont intercalées des lentilles de glace. Des essais conduits en laboratoire ont confirmé les résultats des essais in situ avec ancrages au sol, pénétromè tres et capsules manométriques à Thompson, au Manitoba. Ces essais avaient démontré que les sols présentaient une meilleure résistance mécanique dans le sens horizontal, parallèlement aux couches, que dans le sens vertical. On a échantillonné des blocs non perturbés de ces sols gelés laminés (à varves), et préparé des éprouvettes, orientées de facons diverses par rapport à la direction de la stratification. Des essais de résistance à la compression sans étreinte latérale, effectués sur des échantillons naturellement gelés, et sur d'autres remaniés et artificiellement gelés, ont démontré l'importante anisotropie de la résistance mécanique due à l'anisotropie naturelle de la structure du sol. Peer reviewed: Yes NRC publication: Yes |
format |
Article in Journal/Newspaper |
author |
Baker, T. H. W. Johnston, G. H. |
author_facet |
Baker, T. H. W. Johnston, G. H. |
author_sort |
Baker, T. H. W. |
title |
Unconfined compression tests on anisotropic frozen soils from Thompson, Manitoba |
title_short |
Unconfined compression tests on anisotropic frozen soils from Thompson, Manitoba |
title_full |
Unconfined compression tests on anisotropic frozen soils from Thompson, Manitoba |
title_fullStr |
Unconfined compression tests on anisotropic frozen soils from Thompson, Manitoba |
title_full_unstemmed |
Unconfined compression tests on anisotropic frozen soils from Thompson, Manitoba |
title_sort |
unconfined compression tests on anisotropic frozen soils from thompson, manitoba |
publishDate |
1983 |
url |
https://nrc-publications.canada.ca/eng/view/ft/?id=e4fb42b8-2420-4f5a-b61c-0fea3d772019 https://nrc-publications.canada.ca/eng/view/object/?id=e4fb42b8-2420-4f5a-b61c-0fea3d772019 https://nrc-publications.canada.ca/fra/voir/objet/?id=e4fb42b8-2420-4f5a-b61c-0fea3d772019 |
genre |
Ice permafrost pergélisol |
genre_facet |
Ice permafrost pergélisol |
op_relation |
Permafrost. 4th International Conference, Proceedings, Permafrost: 4th International Conference, July 17, 1983, Fairbanks, Alaska, United States, ISBN: 0-309-03435-3, Publication date: 1983, Pages: 40–45 report_number:DBR-P-1168 |
_version_ |
1810449267390676992 |