ACS provides Pile Integrity Testing (PIT), a “low strain” non-destructive testing procedure, which uses the pulse-echo method to check the length of, or detect defects in cast-in-place or driven piles. This test is routinely used to determine lengths for existing piles under existing structures.
The testing procedure entails temporarily attaching a sensor to the top of the pile. The pile is then struck with a calibrated hammer, and the wave propagates down and back through the concrete. The wave is analyzed to determine pile integrity and size.
Below is an example of a typical PIT readout as well as some of the equipment used during the testing.
Click Here for a PDF version of the sample PIT plot.
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