| Title | Geotechnical data from a prehistoric landslide site at Low, Quebec |
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| Author | Wang, B |
| Source | GeoHazards 7 - Canmore 2018: The 7th Canadian Geohazards Conference, proceedings; 103, 2018 p. 1-8 |
| Image |  |
| Year | 2018 |
| Alt Series | Natural Resources Canada, Contribution Series 20170307 |
| Publisher | Canadian Geotechnical Society |
| Meeting | GeoHazards 7 - The 7th Canadian Geohazards Conference; Canmore, AB; CA; June 3-6, 2018 |
| Document | book |
| Lang. | English |
| Media | paper; digital |
| File format | pdf |
| Province | Quebec |
| NTS | 31G/13 |
| Area | Low |
| Lat/Long WENS | -76.0000 -75.5000 46.0000 45.7500 |
| Subjects | surficial geology/geomorphology; engineering geology; landslides; marine clays; sensitive clays; soils; shear tests; penetrometers; shear strength; pore pressures; grain size distribution; plasticity;
plastic limit analysis; liquid limit analyses; Champlain Sea Clay; Phanerozoic; Cenozoic; Quaternary |
| Illustrations | location maps; geophysical images; tables; profiles; graphs |
| Program | Public Safety Geoscience Assessing Earthquake Geohazards |
| Released | 2018 06 01 |
| Abstract | Geotechnical site investigations were conducted at a prehistoric landslide site at Low, Quebec. The landslide occurred in Champlain Sea clay of up to 43 m thick. Cone penetrometer tests (CPT) and vane
shear tests resulted in a CPT bearing factor Nkt of 17.0 for the clay undisturbed by the landslide and 11.5 for that of the disturbed materials. A correlation of the peak undrained shear strength (Cu) of the undisturbed clay was found to be Cu = 28 +
1.42 H (kPa), where H (m) is depth from the pre-failure ground surface. |
| Summary | (Plain Language Summary, not published)
Geotechnical studies are being carried at a prehistoric landslide site in Low, Quebec. The landslide occurred in Champlain Sea clay and was triggered by
an earthquake about a thousand years ago. It is one of three landslides selected for a study to determine the magnitude of the earthquake. A field investigation program was carried out at the Low site. The program consisted of field measurements of
the sediment thickness, shear strength tests of the sediments, soil sampling and laboratory testing. The sediment was measured to be up to 43 m thick. The clay shear strength was found to follow a linear correlation with depth. A failure surface was
found to be about 10 to 18 m below the current ground surface. The paper presents the geotechnical data obtained from the field and laboratory tests. The results are expected to be useful for researchers and practitioners dealing with similar
problems in the region. |
| GEOSCAN ID | 306365 |
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