Lateral Resistance of Helical Pile Groups—Case Study
Why this work is in the frame
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Bibliographic record
Abstract
Helical piles are used frequently in western Canada to support transmission line towers due to their high tensile capacities and their ease of installation in difficult soil conditions such as soft clays or organic materials. There are several studies documenting their performance under lateral loads. However, most of the available studies are for single piles. The use of group of piles to support the foundations of transmission line towers is very common. Depending on the type of tower (i.e., tangent, light angle, heavy angle, or dead end) and loading conditions, groups of two to five piles are frequently used. In the present study, two pile groups, each of them with two piles, were presented. The paper documents the pile configuration and installation details of pile groups. The pile groups were installed into very stiff clay till so that one pile was vertical and the trailing pile was inclined at batter angle of either 20 or 30°. Soil stratifications and groundwater conditions were also summarized. Lateral load tests were performed using ASTM standard ASTM D3966 (ASTM 2013) for lateral load tests and the results were summarized in the paper. The results of the load tests were compared to a theoretical model using nonlinear p-y curves for lateral loading and t-z curves for axial loading. Based on the results of this study, it was found that a group of two helical piles can develop considerable resistance to lateral loads and that the lateral resistances of the pile group are highly dependent on the batter angle.
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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 it