Ground freezing and sampling of foundation soils at Duncan Dam
In situ ground freezing to obtain undisturbed samples of a loose sand beneath the Duncan Dam in British Columbia is described. This was the first known use of ground freezing to assist in obtaining samples at depth greater than 10 m in Canada. Once frozen, the sand was cored and brought to the surfa...
Published in: | Canadian Geotechnical Journal |
---|---|
Main Authors: | , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Canadian Science Publishing
1994
|
Subjects: | |
Online Access: | http://dx.doi.org/10.1139/t94-109 http://www.nrcresearchpress.com/doi/pdf/10.1139/t94-109 |
id |
crcansciencepubl:10.1139/t94-109 |
---|---|
record_format |
openpolar |
spelling |
crcansciencepubl:10.1139/t94-109 2024-09-15T18:02:40+00:00 Ground freezing and sampling of foundation soils at Duncan Dam Sego, D.C. Robertson, P.K. Sasitharan, S. Kllpatrick, B.L. Pillai, V.S. 1994 http://dx.doi.org/10.1139/t94-109 http://www.nrcresearchpress.com/doi/pdf/10.1139/t94-109 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Geotechnical Journal volume 31, issue 6, page 939-950 ISSN 0008-3674 1208-6010 journal-article 1994 crcansciencepubl https://doi.org/10.1139/t94-109 2024-08-08T04:13:37Z In situ ground freezing to obtain undisturbed samples of a loose sand beneath the Duncan Dam in British Columbia is described. This was the first known use of ground freezing to assist in obtaining samples at depth greater than 10 m in Canada. Once frozen, the sand was cored and brought to the surface using a Cold Regions Research and Engineering Laboratory core barrel, which is used extensively in permafrost regions. The design, installation, and performance of the liquid nitrogen freezing systems are described in detail. The drilling, sampling, and preparation of the frozen core for transport to the testing facility are also outlined. The quality of the core retrieved during the sampling was judged to be excellent, and good agreement was found between the void ratios measured using both the frozen core and high-quality gamma–gamma density logging techniques, which were performed adjacent to ground-freezing and sampling locations. Key words : ground freezing, cohesionless soils, undisturbed sampling. Article in Journal/Newspaper Cold Regions Research and Engineering Laboratory permafrost Canadian Science Publishing Canadian Geotechnical Journal 31 6 939 950 |
institution |
Open Polar |
collection |
Canadian Science Publishing |
op_collection_id |
crcansciencepubl |
language |
English |
description |
In situ ground freezing to obtain undisturbed samples of a loose sand beneath the Duncan Dam in British Columbia is described. This was the first known use of ground freezing to assist in obtaining samples at depth greater than 10 m in Canada. Once frozen, the sand was cored and brought to the surface using a Cold Regions Research and Engineering Laboratory core barrel, which is used extensively in permafrost regions. The design, installation, and performance of the liquid nitrogen freezing systems are described in detail. The drilling, sampling, and preparation of the frozen core for transport to the testing facility are also outlined. The quality of the core retrieved during the sampling was judged to be excellent, and good agreement was found between the void ratios measured using both the frozen core and high-quality gamma–gamma density logging techniques, which were performed adjacent to ground-freezing and sampling locations. Key words : ground freezing, cohesionless soils, undisturbed sampling. |
format |
Article in Journal/Newspaper |
author |
Sego, D.C. Robertson, P.K. Sasitharan, S. Kllpatrick, B.L. Pillai, V.S. |
spellingShingle |
Sego, D.C. Robertson, P.K. Sasitharan, S. Kllpatrick, B.L. Pillai, V.S. Ground freezing and sampling of foundation soils at Duncan Dam |
author_facet |
Sego, D.C. Robertson, P.K. Sasitharan, S. Kllpatrick, B.L. Pillai, V.S. |
author_sort |
Sego, D.C. |
title |
Ground freezing and sampling of foundation soils at Duncan Dam |
title_short |
Ground freezing and sampling of foundation soils at Duncan Dam |
title_full |
Ground freezing and sampling of foundation soils at Duncan Dam |
title_fullStr |
Ground freezing and sampling of foundation soils at Duncan Dam |
title_full_unstemmed |
Ground freezing and sampling of foundation soils at Duncan Dam |
title_sort |
ground freezing and sampling of foundation soils at duncan dam |
publisher |
Canadian Science Publishing |
publishDate |
1994 |
url |
http://dx.doi.org/10.1139/t94-109 http://www.nrcresearchpress.com/doi/pdf/10.1139/t94-109 |
genre |
Cold Regions Research and Engineering Laboratory permafrost |
genre_facet |
Cold Regions Research and Engineering Laboratory permafrost |
op_source |
Canadian Geotechnical Journal volume 31, issue 6, page 939-950 ISSN 0008-3674 1208-6010 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/t94-109 |
container_title |
Canadian Geotechnical Journal |
container_volume |
31 |
container_issue |
6 |
container_start_page |
939 |
op_container_end_page |
950 |
_version_ |
1810440096479969280 |