| Titre | In-situ measurements of ground response to heat penetration induced by removal of organic cover in fine-grained permafrost soils |
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| Auteur | Wang, B; Saad, B |
| Source | Proceedings of the First North American Landslide Conference; 2007 p. 1595-1604 |
| Image |  |
| Année | 2007 |
| Séries alt. | Secteur des sciences de la Terre, Contribution externe 20070061 |
| Réunion | First North American Landslide Conference; Vail; US; juin 3-8, 2007 |
| Document | livre |
| Lang. | anglais |
| Media | papier; CD-ROM; numérique |
| Province | Territoires du Nord-Ouest |
| SNRC | 107B/10 |
| Région | Mackenzie Valley; Inuvik |
| Lat/Long OENS | -133.5000 -133.0000 68.7500 68.5000 |
| Sujets | dépôts de glissement de terrain; glissements de terrain; dépôts de pentes; glissements de pentes; stabilité des pentes; analyses de la stabilité des pentes; pergélisol; transport des sediments;
températures au sol; géologie de l'ingénieur; géologie de l'environnement |
| Illustrations | croquis cartographiques; photographies; graphiques; graphiques |
| Diffusé | 2007 01 01 |
| Résumé | (disponible en anglais seulement)
This paper presents initial results of a geotechnical investigation conducted near an active landslide in the Mackenzie Valley, Northwest Territories (NWT),
Canada. The purpose of the study is to investigate the triggering mechanism of landslides in fine-grained permafrost soils. A test plot was created near an active landslide north of Inuvik, NWT to examine ground condition changes due to excessive
heat penetration. The surface organic cover was removed from a test area of about 20 m by 20 m to increase heat penetration into the ground. Geotechnical instruments were installed to monitor ground condition changes in and around the test plot. Data
were collected for the first summer following the installation of the instruments. The monitoring data and field observations indicate that the removal of the surface organic cover caused an increase of the thaw depth by about 17 cm during the first
summer. The increase is slightly greater than the thickness of the transient layer between the active layer and the permafrost. A slope movement of about 17 mm was detected within the test plot. The data and the field observations indicate that
landslide may start if thawing penetrates through the transient layer. |
| GEOSCAN ID | 223797 |
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