Assessment of Corroded Rock Bolts with Pulse Echo Tests
Why this work is in the frame
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Bibliographic record
Abstract
Visual inspection of rock bolts could give some indications on their condition and performance. However, it might be misleading because most of the rock bolts are embedded in concrete or grouted in rock mass. Nondestructive methods have to be used for a proper diagnosis of the condition of rock bolts. This study deals with the determination and the location of the corrosion in rock bolts embedded in concrete using a pulse-echo test. Complementary tests were performed using an acoustic emission (AE) test, and measuring the mass loss from corrosion current. Pulse-echo test results showed that a decrease of the energy of the back echo and the trailing wall echo is indicative of the corrosion state. This method enables locating the flaws associated with the corrosion of rock bolts by the calculation of the normalized energy ratio between the echoes coming from the threads of healthy and corroded rock bolts. Results of acoustic emission and imposed electrochemical potential provide information on the corrosion initiation. This research indicates that the pulse-echo is an effective measurement technique for corrosion detection.
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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 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| 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 it