Reinforced lime columns: a new technique for heave control
Bibliographic record
Abstract
Excessive volume changes of expansive soil cause severe damage to civil structures, which costs billions of dollars in annual repairs. In this paper, the optimum ratio of lime to soil weight to maximise the efficiency of lime columns as a technique to reduce the swelling of expansive soil is investigated. A new technique to further enhance the efficiency of the lime columns technique in reducing soil swelling is also investigated, namely reinforced lime columns. The new technique involves reinforcing the lime columns using reinforcement bars attached to the foundation of the structure. The experimental study involved laboratory-scale tests of expansive soil beds treated with lime columns supporting model foundations. The experimental results showed that the optimum lime content is 6% (by weight) of the soil within the column. It was found that the lime columns technique minimised the swelling of the expansive soil by 33%. In the meantime, the reinforced lime columns reduced the swelling of an identical soil bed by 69%. The results also showed that the swelling of the expansive soil decreased with an increase in the ratio L col /D soil (the ratio of the length of lime columns to the depth of expansive soil). Des changements de volume excessifs dans les sols expansifs endommagent gravement les structures civiles, ce qui entraŷne des réparations annuelles se chiffrant à des milliards de dollars. Dans cet exposé, nous étudions la proportion pondérale optimum de chaux dans la terre en tant que technique servant à réduire le gonflement d´un sol expansif. Nous é tudions é galement une nouvelle technique destinée à améliorer encore davantage l´efficacité de la technique à colonnes de chaux pour réduire le gonflement du sol, nommément des colonnes de chaux renforceès. Cette nouvelle technique consiste à renforcer les colonnes de chaux en utilisant des barres de renfort attachées aux fondations de la structure. L´étude expérimentale passe par des essais en laboratoire sur des lits de sol expansif traité avec des colonnes de chaux supportant des fondations modélisées. Les résultats montrent que la teneur optimum en chaux est de 6% (en poids) de sol à l´intérieur de la colonne. Nous avons trouvé que la technique des colonnes de chaux réduit de 33% le gonflement du sol expansif. Par ailleurs, les colonnes de chaux renforcées réduisent de 69% le gonflement d´une couche de sol identique. Les résultats ont montré é galement que le gonflement d´un sol expansif diminue en proportion avec l´augmentation du taux L col / Dsol (longueur des colonnes de chaux par rapport à la profondeur du sol expansif).
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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 | 0.000 | 0.000 |
| 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) | 0.000 | 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".