Investigation of a Significant Slide in the Embankment of an Old Dam
Bibliographic record
Abstract
Shortly after construction was completed, a significant slide occurred in the lower portion of the embankment of an earth dam built in the period 1920-22 but did not affect the function of the reservoir (140 x 180 feet in plain view).Between 1922Between -1930 various various remedies to fix the slide were tried but the slide kept moving downhill during rainy season.Monitoring of water table in the sliding area and stability analysis in the past (during 1970s) indicated a safe slope.The embankment was remodeled slightly in 1954, 1956, and 1971.However, the embankment section in the old slide area remained a matter of serious concern; because Hayward fault is located about 1000 ft.East of the dam and a preliminary analysis indicated the dam to be unsafe during an earthquake event.Yet, the movement was observed during the rainy season.Finally, in 1980, a comprehensive field and laboratory investigation revealed an important but significant information that escaped previous investigations.The stability analysis of the past had failed to identify the failure surface.The surface of sliding was due to a very thin and highly plastic clay layer that was discovered in 1980 by a combination of boring and in-situ cone testing.This combination was also helpful in reaching at the appropriate strength parameters of the highly plastic clay layer which was at its residual angle of friction.This lead to the conclusion to remove the clay layer.The paper presents the details of how the discovery of the thin clay layer.Also presented briefly the remedial measures adopted to replace the clay layer by a free draining granular soil layer.This was achieved by emptying the reservoir and excavating the overlying embankment material and re-compacted it back after the replacement of the clay layer.The paper discusses the importance of combining Geotechnical and Geological details in establishing what is down there (the subsurface profile).The paper briefly presents the remedial measures to fix the slide.
Fetched live from OpenAlex and de-inverted. Abstracts are not stored in this database: the inverted indexes are 8.6 GB of the frame’s 9.3 GB of text, and the host has 13 GB free.
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 | 0.000 |
| Science and technology studies | 0.000 | 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".