Evaluating Thermal Integrity Profiling Defects and Rating Criteria-Video

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Video Summary

GTR researchers evaluated thermal integrity profiling (TIP) defects using three full-scale drilled shafts containing deliberately constructed anomalies. They compared field measurements with thermal simulations and cross-hole sonic logging, examining how defect size, shape, location, and construction affected temperature readings. The project’s four-year duration was extended by permitting delays and COVID-19.<br /><br />The study compared its results with published data and current acceptance methods based on effective radius and local cover. It proposes supplemental temperature criteria: acceptable defects produce an average temperature reduction of up to 2°F or a local reduction of up to 5°F; marginally acceptable results are above those limits but no more than 5°F average or 9°F local; larger reductions are unacceptable. Nearly all data points aligned with the proposed criteria, with one exception involving a cube positioned directly on a sensor wire, which caused a pronounced local temperature drop. The researchers recommend further study to refine the criteria and improve interpretation of TIP results.

Keywords

thermal integrity profiling

TIP defects

drilled shafts

temperature criteria

cross-hole sonic logging

structural anomalies