On the effect of soil water saturation on buried steel pipe responses under external load
Bibliographic record
Abstract
Soil water saturation affects soil behavior when subjected to external loads and thus buried pipe deformation. To investigate this effect, full-scale tests were conducted on a buried steel pipe with a diameter of 600 mm. The deformed pipe ring transforms from a “heart” shape into an inclined “heart” shape due to the load redistribution within the soil after increasing soil water saturation. Then, a three-dimensional finite element model was created and validated based on the experimental data. A parametric study was thereafter performed to investigate the impact of factors including soil water saturation, cover depth, and pipe wall-thickness on buried pipe responses when subjected to external loads. Soil might be simply modeled as a linear elastic material at a large cover depth (>0.6 m) or a water saturation < 80%. Soil plasticity should be considered at a relatively low cover depth (≤0.6 m) and a high water saturation (≥80%). The pipe circumferential stress is inversely proportional to the square of pipe wall-thickness when the pipe–soil stiffness ratio is equal to or greater than 0.13.
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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 | 0.001 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 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) | 0.002 | 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".