BRIDGE REPLACED IN SECTIONS - AT NIGHT : THE LIONS GATE BRIDGE TRUSS AND DECK SECTIONS WERE REPLACED DURING 10-HOUR NIGHT CLOSURES
Bibliographic record
Abstract
An unprecedented rehabilitation project in Vancouver, British Columbia, Canada saw the replacement of Lions Gate Bridge section by section over 10 hour periods in the night, while the bridge remained in service during the day. The $80 million effort on the 45 year old bridge involved seismic retrofitting, which included three primary elements: 1) build-up of the existing H-bents in order to longitudinally anchor the structure; 2) allow piers to rock transversely; and, 3) add piled foundations in areas where liquefaction potential is high. The project also included widening of sidewalks, as well as replacement of the suspended span deck. This article details the efforts taken in the restoration process. It is believed that the Lions Gate Bridge is the first major suspension bridge that was seismically retrofitted under a design/build format. In addition to being vulnerable to high winds, the bridge is also thought to be the first major suspension bridge that had its deck completely replaced while maintaining traffic.
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| 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 | 0.002 | 0.000 |
| Scholarly communication | 0.001 | 0.000 |
| Open science | 0.001 | 0.001 |
| Research integrity | 0.001 | 0.001 |
| Insufficient payload (model declined to judge) | 0.009 | 0.001 |
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 source (direct Gemma or distilled Codex), 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".