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Record W2142022104

Experiences with the Caisson Sinking Method

2005· article· en· W2142022104 on OpenAlex
Roger Woodhead, Kevin Main

Why this work is in the frame

A frame that forgets how it found something cannot be audited. These are the routes that admitted this work.

aboutThe title or abstract carries a Canadian signal from the geographic lexicon.
no affNo Canadian affiliation: this work is invisible to an affiliation-only frame.
No Canadian affiliation. An affiliation-only frame, the usual design, would never have seen this work. It is one of the works that make the case for inverting the frame.

Bibliographic record

VenueACI Concrete International · 2005
Typearticle
Languageen
FieldEngineering
TopicGeotechnical Engineering and Underground Structures
Canadian institutionsnot available
Fundersnot available
KeywordsCaissonEngineeringGeotechnical engineeringRetaining wallCivil engineeringStructural engineering
DOInot available

Abstract

fetched live from OpenAlex

The caisson sinking method is one way to construct underground concrete structures, such as bridge piers, intake structures, pump houses and dumper pits, in soils with a high water table. In this method, a caisson is constructed on the unexcavated site, with the caisson comprising only the walls of the final structure. Then excavating is conducted inside the walls so that the caisson sinks under its own weight. This article describes the use of the caisson method in the construction of three large underground structures in Vancouver, British Columbia. The structures were a pump house at a wastewater treatment plant and two rail-car dumper pits. The first and largest dumper pit presented the biggest construction challenges. Many of the problems were encountered in the final stage of the operation, when the caisson was taken to its final depth. Sloughing was widespread and progress was very slow. It was found that boulders were holding up the steel shoe that was placed at the bottom of the exterior walls to assist the sinking process. Several contingency methods were needed to allow the caisson to reach its final depth. Refinements to the cassion sinking procedure based on this first experience allowed for easier construction of the other underground structures.

Fetched live from OpenAlex and de-inverted. Abstracts are not stored in this database: the inverted indexes are 8.6 GB of the frame’s 9.3 GB of text, and the host has 13 GB free.

Full frame distilled prediction

Teacher imitation

Not 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.

metaresearch head score (Codex)0.000
metaresearch head score (Gemma)0.000
Version: codex-gemma-dda1882f352aValidation status: machine_predicted_unvalidated
Candidate categoriesnone
Consensus categoriesnone
DomainCandidate signal: none · Consensus signal: none
Study designCandidate signal: Simulation or modeling · Consensus signal: none
GenreCandidate signal: Empirical · Consensus signal: Empirical
Teacher disagreement score0.481
Threshold uncertainty score0.246

Codex and Gemma teacher scores by category

CategoryCodexGemma
Metaresearch0.0000.000
Meta-epidemiology (narrow)0.0000.000
Meta-epidemiology (broad)0.0000.000
Bibliometrics0.0000.000
Science and technology studies0.0000.000
Scholarly communication0.0000.000
Open science0.0000.000
Research integrity0.0000.000
Insufficient payload (model declined to judge)0.0000.000

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.

Opus teacher head0.006
GPT teacher head0.229
Teacher spread0.223 · how far apart the two teachers sit on this one work
Validation statusscore_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from it