Laboratory studies of near surface permafrost conditions in fine-grained soils from the Mackenzie valley, NWT
Laboratory studies were conducted on fine-grained soils from the Mackenzie valley, N.W.T., Canada, to study the transient layer. Two laboratory models simulating repeated freeze-thaw cycles were placed in a walk-in freezer. Temperatures and pore water pressures were monitored along the soil columns...
Main Author: | |
---|---|
Format: | Thesis |
Language: | English |
Published: |
Université d'Ottawa / University of Ottawa
2009
|
Subjects: | |
Online Access: | https://dx.doi.org/10.20381/ruor-19271 http://www.ruor.uottawa.ca/handle/10393/28451 |
id |
ftdatacite:10.20381/ruor-19271 |
---|---|
record_format |
openpolar |
spelling |
ftdatacite:10.20381/ruor-19271 2023-05-15T16:37:03+02:00 Laboratory studies of near surface permafrost conditions in fine-grained soils from the Mackenzie valley, NWT Cormier, Jacqueline 2009 https://dx.doi.org/10.20381/ruor-19271 http://www.ruor.uottawa.ca/handle/10393/28451 en eng Université d'Ottawa / University of Ottawa Engineering, Geological. Engineering, Civil. Text Thesis article-journal ScholarlyArticle 2009 ftdatacite https://doi.org/10.20381/ruor-19271 2021-11-05T12:55:41Z Laboratory studies were conducted on fine-grained soils from the Mackenzie valley, N.W.T., Canada, to study the transient layer. Two laboratory models simulating repeated freeze-thaw cycles were placed in a walk-in freezer. Temperatures and pore water pressures were monitored along the soil columns during eleven freeze-thaw cycles. At the end of the testing program, soil moisture conditions and cryostructures were examined. Temperature and pore water pressure data were compared to computed results and the thaw consolidation theory, respectively. In both laboratory models, an ice-rich zone developed at the active layer and permafrost interface as a result of moisture migration to the freezing front. The high ice content zone was altered under extreme air temperature conditions. Distinct cryostructures were created after repeated freeze-thaw processes. The formation and shifting of the ice-rich zone provide useful information on moisture conditions and the cryostructures for further understanding the transient layer. Thesis Ice Mackenzie Valley permafrost DataCite Metadata Store (German National Library of Science and Technology) Canada Mackenzie Valley ENVELOPE(-126.070,-126.070,52.666,52.666) |
institution |
Open Polar |
collection |
DataCite Metadata Store (German National Library of Science and Technology) |
op_collection_id |
ftdatacite |
language |
English |
topic |
Engineering, Geological. Engineering, Civil. |
spellingShingle |
Engineering, Geological. Engineering, Civil. Cormier, Jacqueline Laboratory studies of near surface permafrost conditions in fine-grained soils from the Mackenzie valley, NWT |
topic_facet |
Engineering, Geological. Engineering, Civil. |
description |
Laboratory studies were conducted on fine-grained soils from the Mackenzie valley, N.W.T., Canada, to study the transient layer. Two laboratory models simulating repeated freeze-thaw cycles were placed in a walk-in freezer. Temperatures and pore water pressures were monitored along the soil columns during eleven freeze-thaw cycles. At the end of the testing program, soil moisture conditions and cryostructures were examined. Temperature and pore water pressure data were compared to computed results and the thaw consolidation theory, respectively. In both laboratory models, an ice-rich zone developed at the active layer and permafrost interface as a result of moisture migration to the freezing front. The high ice content zone was altered under extreme air temperature conditions. Distinct cryostructures were created after repeated freeze-thaw processes. The formation and shifting of the ice-rich zone provide useful information on moisture conditions and the cryostructures for further understanding the transient layer. |
format |
Thesis |
author |
Cormier, Jacqueline |
author_facet |
Cormier, Jacqueline |
author_sort |
Cormier, Jacqueline |
title |
Laboratory studies of near surface permafrost conditions in fine-grained soils from the Mackenzie valley, NWT |
title_short |
Laboratory studies of near surface permafrost conditions in fine-grained soils from the Mackenzie valley, NWT |
title_full |
Laboratory studies of near surface permafrost conditions in fine-grained soils from the Mackenzie valley, NWT |
title_fullStr |
Laboratory studies of near surface permafrost conditions in fine-grained soils from the Mackenzie valley, NWT |
title_full_unstemmed |
Laboratory studies of near surface permafrost conditions in fine-grained soils from the Mackenzie valley, NWT |
title_sort |
laboratory studies of near surface permafrost conditions in fine-grained soils from the mackenzie valley, nwt |
publisher |
Université d'Ottawa / University of Ottawa |
publishDate |
2009 |
url |
https://dx.doi.org/10.20381/ruor-19271 http://www.ruor.uottawa.ca/handle/10393/28451 |
long_lat |
ENVELOPE(-126.070,-126.070,52.666,52.666) |
geographic |
Canada Mackenzie Valley |
geographic_facet |
Canada Mackenzie Valley |
genre |
Ice Mackenzie Valley permafrost |
genre_facet |
Ice Mackenzie Valley permafrost |
op_doi |
https://doi.org/10.20381/ruor-19271 |
_version_ |
1766027355277492224 |