A simplified solution for buried continuous pipe rehabilitated by liner under the effect of surface load and soil void
Bibliographic record
Abstract
Underground pipelines play a crucial role in the rapid urbanization of cities. Steel pipelines, renowned for their high strength, durability, and excellent weldability, are extensively employed in water supply systems. However, as these pipelines age, the soil beneath them may experience subsidence, resulting in void formation that can severely threaten the pipeline's integrity and even compromise the surface above. This study investigates the mechanical behavior of steel pipelines rehabilitated with liners, subjected to surface loads and soil voids, based on the principles of elastic foundation beams. The process is thoroughly detailed. Subsequently, the derived analytical model is validated through the finite element method, and the effects of various parameters—such as void width, distance from the void to the load center, load width, soil stiffness, burial depth, pipeline diameter, and pipe wall thickness—on the mechanical performance of the pipeline are explored. The failure limit state of the pipeline is also examined. The findings reveal that when the load center aligns with the void center, liner stress reaches its peak. Liner stress initially increases with void width but gradually stabilizes as it approaches yield stress. Moreover, for pipes with higher diameter-to-thickness ratios, the pipe thickness becomes more critical as stress intensifies.
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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 | 0.000 |
| 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 | 0.001 |
| 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".