Back Analysis of a Slope Failure in Permafrost in the Mackenzie Valley, Canada
Bibliographic record
Abstract
A small landslide was observed next to an existing large slide in the Travaillant Lake area in summer 2005. The area was burned by forest fire in 1998. Information available from air photos, field observations and recent photographs indicated that the observed slope failure is relatively new (probably within the last year or two). This paper describes field investigations conducted in the area in late summer 2005, and slope stability studies carried out to back analyze the slope failure mechanisms. Test pits were excavated in the area to investigate subsurface soil conditions and soil samples were taken for geotechnical laboratory testing. Field vane shear tests were conducted on the active layer to measure the shear resistance. Laboratory tests showed that the moisture content in the active layer increased with depth. The field vane shear tests indicated very low undrained shear strength of the fine-grained active layer soils. Slope stability analyses revealed that the slope would be in a critical condition when the vane shear strength parameters were used. The studies provided insights into understanding initiation of landslides in the region. The analyses also indicated that the field vane could be a useful tool for slope stability studies in fine-grained permafrost soils.
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.001 | 0.001 |
| Science and technology studies | 0.001 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.001 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one source (direct Gemma or distilled Codex), not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".