Applicable to investigating deep-foundation structures like: Bridges, Piers, jetties, towers and buildings, we conduct Sonic echo / Impulse response pile integrity testing (PIT) in accordance to ASTM D5882-16 and AS 2159-2009 procedure, data acquisition, processing and reporting. The method is effective in accurately determining: Depth, geometrical and condition parameters of unknown deep foundation or piles, hence handy for quality verification of on-going pile-foundation works.
Based on stress wave propagation and reflection theory; a stress wave (compression / tension) in a uniform rod is reflected if the wave encounters an impedance change or discontinuity. Structurally sound shafts made with concrete should have:
QA/QC: The characterization and location of defects is only as good as the accuracy of wave velocity determination and quality of the pile. Results may be categorized into: