Corrosion evaluation of helical steel piles in unsaturated tropical soils: a case study
Bibliographic record
Abstract
This note presents a case study which aimed to identify the environmental effects that may cause or accelerate the corrosion of helical steel piles installed in a typical site of Brazilian unsaturated tropical soil. For this study, an experimental investigation was carried out based on a detailed examination of two helical piles, fabricated with weathering steel, exhumed after approximately 4 years of installation. The pile corrosion was evaluated through qualitative and quantitative interpretations. The results indicate that the corrosiveness increases markedly as the zone of groundwater table fluctuation was approached, and at the top-soil zone, due to the higher oxygen concentration. Insignificant corrosion was detected along the length of pile embedded below the groundwater table. Additionally, the inner surface of the examined closed-end steel pipe piles, which was not in contact with the soil, is much less affected by corrosion compared with the outer surface.
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How this classification was reachedexpand
Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.001 | 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 | 0.001 |
| 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 teacher head, 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".