mbilal89
Structural
- Feb 26, 2012
- 22
Hello everyone,
I have a few questions regarding interpretation of low strain pile integrity test graphs. Attached with my post are the results of four piles tested using PDI's Pile integrity tester. All that I have read on the internet and in books regarding the analysis process is that we have to apply a low pass filter not more than one tenth of the length, high pass filter not less than three times the pile length, the magnification delay is set at 20% by default and changing the wavelength removes the noise in the results. What I don't know is how much should I magnify the waves in order to identify if a toe reflection is achieved.
I have tried to analyse the raw results, in pile 1 and 4, I certainly have noise most probably due to the protruding dowels, which I am not able to remove even by applying wavelet analysis. But I am confused in case of pile 2 and 3, whether it is actually the toe reflection or noise. It cannot be noise since I don't see a source for it. But how can I be certain??
I have a few questions regarding interpretation of low strain pile integrity test graphs. Attached with my post are the results of four piles tested using PDI's Pile integrity tester. All that I have read on the internet and in books regarding the analysis process is that we have to apply a low pass filter not more than one tenth of the length, high pass filter not less than three times the pile length, the magnification delay is set at 20% by default and changing the wavelength removes the noise in the results. What I don't know is how much should I magnify the waves in order to identify if a toe reflection is achieved.
I have tried to analyse the raw results, in pile 1 and 4, I certainly have noise most probably due to the protruding dowels, which I am not able to remove even by applying wavelet analysis. But I am confused in case of pile 2 and 3, whether it is actually the toe reflection or noise. It cannot be noise since I don't see a source for it. But how can I be certain??