Post-Earthquake Repair and Improvements, San Vicente, Chile
Bibliographic record
Abstract
The magnitude 8.8 earthquake of February 2010 in Chile dealt a heavy blow to the 600-meter (2,000-ft) wharf structure at Berths 1, 2, and 3 of the San Vicente Terminal Internacional in the Biobio region of Chile. Earthquake-induced liquefaction and lateral spreading in the upland fill and wharf slope resulted in permanent wharf lateral deflections in excess of 600 mm (24 in), along with associated damage to concrete piling and pile-to-cap connections. This paper presents the post-earthquake repair and rehabilitation program for the wharf structure. The proposed rehabilitation strategy consisted of two phases: first, a structural assessment of the post-earthquake conditions with recommendations for short-term repairs and restrictions on operating criteria, followed by a structural retrofit program designed to stiffen the existing structure and provide a new lateral-force resisting system. An innovative approach to the seismic retrofit was used, which incorporates a combination of new plumb piles behind the wharf with ground improvement to ensure ample lateral strength and ductility capacity of the structure. The wharf retrofit also included a new apron structure in front of the wharf, designed to improve the local stability of existing slender piling (impacted by P-delta effects), with the added benefit of providing support for future crane rail installation and increased dredge depth. Finally, a 200-meter (656-ft) finger pier extension was included in the program, bringing the structurally retrofitted 4-berth system to a total combined 800 meters in length, designed to the most current seismic design standards.
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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 | 0.000 | 0.001 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.001 | 0.000 |
| Science and technology studies | 0.001 | 0.000 |
| Scholarly communication | 0.001 | 0.000 |
| Open science | 0.001 | 0.001 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.010 | 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".