The September 5, 1987, landslide on the La Grande River, James Bay, Quebec, Canada
The September 5, 1987, landslide at kilometre 82.5 on La Grande River affected a slope about 60 m high inclined at about 35°. The site had been identified as presenting high risks of a major landslide and had been under observation for several years. The conditions existing before the landslide are...
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Canadian Science Publishing
1991
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crcansciencepubl:10.1139/t91-032 2023-12-17T10:33:01+01:00 The September 5, 1987, landslide on the La Grande River, James Bay, Quebec, Canada Lefebvre, Guy Rosenberg, Peter Paquette, Jean Lavallée, J. G. 1991 http://dx.doi.org/10.1139/t91-032 http://www.nrcresearchpress.com/doi/pdf/10.1139/t91-032 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Geotechnical Journal volume 28, issue 2, page 263-275 ISSN 0008-3674 1208-6010 Civil and Structural Engineering Geotechnical Engineering and Engineering Geology journal-article 1991 crcansciencepubl https://doi.org/10.1139/t91-032 2023-11-19T13:38:36Z The September 5, 1987, landslide at kilometre 82.5 on La Grande River affected a slope about 60 m high inclined at about 35°. The site had been identified as presenting high risks of a major landslide and had been under observation for several years. The conditions existing before the landslide are relatively well documented from a deep boring put down in 1975 at the slide location and from prior observations and photographs of the river bank erosion. The overburden deposit, sand at the ground surface changing to a silty clay at depth, was normally consolidated but affected by a strong underdrainage. Stability analyses confirm the strong underdrainage deduced from the 1975 piezometric reading. The slide retrogressed 290 m from the river on a surface inclined at 6°. The location of the retrogression surface appears related to the undrained shear strength profile. Key words: landslide, earthflow, sensitive clay, groundwater, river erosion, slope stability. Article in Journal/Newspaper La Grande River James Bay Canadian Science Publishing (via Crossref) Canada Canadian Geotechnical Journal 28 2 263 275 |
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Open Polar |
collection |
Canadian Science Publishing (via Crossref) |
op_collection_id |
crcansciencepubl |
language |
English |
topic |
Civil and Structural Engineering Geotechnical Engineering and Engineering Geology |
spellingShingle |
Civil and Structural Engineering Geotechnical Engineering and Engineering Geology Lefebvre, Guy Rosenberg, Peter Paquette, Jean Lavallée, J. G. The September 5, 1987, landslide on the La Grande River, James Bay, Quebec, Canada |
topic_facet |
Civil and Structural Engineering Geotechnical Engineering and Engineering Geology |
description |
The September 5, 1987, landslide at kilometre 82.5 on La Grande River affected a slope about 60 m high inclined at about 35°. The site had been identified as presenting high risks of a major landslide and had been under observation for several years. The conditions existing before the landslide are relatively well documented from a deep boring put down in 1975 at the slide location and from prior observations and photographs of the river bank erosion. The overburden deposit, sand at the ground surface changing to a silty clay at depth, was normally consolidated but affected by a strong underdrainage. Stability analyses confirm the strong underdrainage deduced from the 1975 piezometric reading. The slide retrogressed 290 m from the river on a surface inclined at 6°. The location of the retrogression surface appears related to the undrained shear strength profile. Key words: landslide, earthflow, sensitive clay, groundwater, river erosion, slope stability. |
format |
Article in Journal/Newspaper |
author |
Lefebvre, Guy Rosenberg, Peter Paquette, Jean Lavallée, J. G. |
author_facet |
Lefebvre, Guy Rosenberg, Peter Paquette, Jean Lavallée, J. G. |
author_sort |
Lefebvre, Guy |
title |
The September 5, 1987, landslide on the La Grande River, James Bay, Quebec, Canada |
title_short |
The September 5, 1987, landslide on the La Grande River, James Bay, Quebec, Canada |
title_full |
The September 5, 1987, landslide on the La Grande River, James Bay, Quebec, Canada |
title_fullStr |
The September 5, 1987, landslide on the La Grande River, James Bay, Quebec, Canada |
title_full_unstemmed |
The September 5, 1987, landslide on the La Grande River, James Bay, Quebec, Canada |
title_sort |
september 5, 1987, landslide on the la grande river, james bay, quebec, canada |
publisher |
Canadian Science Publishing |
publishDate |
1991 |
url |
http://dx.doi.org/10.1139/t91-032 http://www.nrcresearchpress.com/doi/pdf/10.1139/t91-032 |
geographic |
Canada |
geographic_facet |
Canada |
genre |
La Grande River James Bay |
genre_facet |
La Grande River James Bay |
op_source |
Canadian Geotechnical Journal volume 28, issue 2, page 263-275 ISSN 0008-3674 1208-6010 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/t91-032 |
container_title |
Canadian Geotechnical Journal |
container_volume |
28 |
container_issue |
2 |
container_start_page |
263 |
op_container_end_page |
275 |
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1785586884632641536 |