Downhole Seismic Testing within Existing Steel Cased Sonic Boreholes
Bibliographic record
Abstract
Downhole seismic (DHS) data was reliably recorded in steel cased sonic drilled boreholes without the usual additional time or materials required to grout and prepare the boreholes. DHS results compared well with adjacent seismic cone penetration test (SCPT) results (sonic holes were located within a few metres (m) of existing SCPTs). This technique works well in uncemented granular and fine-grained soils when sufficient time is allowed for the induced dynamic effects to dissipate. However, a drawback of this technique is that a rapid assessment of the data is necessary to ensure that sufficient records have been collected for a complete profile. Once the casing has been pulled the opportunity to collect data is lost, unlike a grouted casing installation that can be revisited to complete additional testing, if necessary. As sonic drilling is becoming more common in geotechnical investigations, this paper demonstrates how sonic holes can be utilized without the added expense and time of a grouted installation to obtain shear wave velocity (Vs) measurements.
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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 | 0.001 |
| Meta-epidemiology (narrow) | 0.001 | 0.001 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.001 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.001 |
| 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".