Hi Casey, great content, thanks for posting. I have a question on the CSL tube spacing, when you do your measurements at the top of pile, are you making an assumption that the spacing is the same throughout the pile shaft? If the spacing varies will it show up as an anomaly?
Thank you. It is common see variation in access tube spacing throughout a shaft. This results in variations in the computed "apparent" sonic velocity. Usually such variations are gradual. True concrete anamolies in a drilled shaft have rather abrupt reductions in both signal energy and apparent sonic velocity. Check out my other CSL videos where I show true shaft anomalies.
Hi Casey, great content, thanks for posting. I have a question on the CSL tube spacing, when you do your measurements at the top of pile, are you making an assumption that the spacing is the same throughout the pile shaft? If the spacing varies will it show up as an anomaly?
Thank you. It is common see variation in access tube spacing throughout a shaft. This results in variations in the computed "apparent" sonic velocity. Usually such variations are gradual. True concrete anamolies in a drilled shaft have rather abrupt reductions in both signal energy and apparent sonic velocity. Check out my other CSL videos where I show true shaft anomalies.