Chief Peguis Trail Extension - Rothesay Street Overpass: Rapid Design and Construction of an Integral Abutment Bridge with MSE Walls and Cellular Concrete Backfill
Bibliographic record
Abstract
The Rothesay Street Overpass is one component of a significant Public Private Partnership (P3) project, the Chief Peguis Trail (CPT) Extension, in Winnipeg, Manitoba. Due to changes in the P3 Contractor's design/construction team, the overpass subcontractor was required to hire a design engineer for the Rothesay Street Overpass, and had less than one year to complete the design and construction of the structure. In the preliminary stages of the CPT project it was decided to raise the overpass 3 m from the original at-grade design in order to eliminate a costly lift station that would have been required for land drainage with a 6 m deep underpass. The overpass is in a congested urban/residential location, and raising the structure required the addition of narrow approach embankments over poor soil conditions between residential housing. Due to the compressed schedule, Mechanically Stabilized Earth (MSE) retaining walls were selected to create the narrow approach embankments, abutment backwalls, and grade changes required to fit the structure into the project's right-of-way. To compensate for the poor underlying soils and high anticipated settlement, lightweight cellular concrete backfill, up to 5 m in depth, was required. The use of cellular concrete around integral abutments provided unique challenges, and innovative details were developed to allow performance of the integral abutments in a relatively rigid backfill. Preliminary design through to construction completion and overpass opening on December 1, 2011, took approximately 11 months, and the design and construction was completed on budget and on schedule. For the covering abstrac of this conference see ITRD number 201211RT334E.
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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 | 0.001 |
| 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".