New Westminster Columbia Section Rehabilitation—Large Diameter Sliplining
Bibliographic record
Abstract
Metro Vancouver is responsible for the conveyance and treatment of wastewater for the Greater Vancouver area which is home to approximately 2.5 million residents. Sections of the wastewater conveyance system are reaching the end of their design life or have experienced accelerated degradation due to corrosive conditions. One such sewer is the New Westminster Interceptor (NWI) Columbia Section, which is a 1.6 km concrete sewer ranging from 1,067- to 1,524-mm diameter. Metro Vancouver has performed temporary repairs along the Columbia Section over the past 20 years. Jacobs was retained as the design engineer to develop a long-term solution and provided construction engineering services for trenchless rehabilitation of the NWI Columbia Section by sliplining the existing concrete pipe with new fiber-reinforced polymer (FRP) pipe. This paper provides an overview of the project and presents a case study of the challenges as they relate to the Owner, Engineer, and various stakeholders.
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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 | 0.001 | 0.001 |
| Science and technology studies | 0.007 | 0.001 |
| Scholarly communication | 0.002 | 0.001 |
| Open science | 0.001 | 0.002 |
| Research integrity | 0.001 | 0.001 |
| Insufficient payload (model declined to judge) | 0.012 | 0.002 |
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".