The ultra sonic signal assists evaluation of pile integrity, continuity, and consistency of the pile material. But do not assist evaluation of pile physical dimensions (that is, cross-sectional area).
ASTM/D6760 (2016) Standard Test Methods for Ultrasonic Crosshole Integrity Testing of Deep Foundations The USPIT detects any defects between two profiles in cast in-situ bored piles, caissons, barrettes, diaphragm walls and other concrete structures.
Test Limitation The signal cannot detect the pile defects outside the access tubes. The signal cannot detect the pile defects at the 50mm pile base. If the pile is too large and the access tubes are too few, then it may miss to detect some defects along the pile.
Tube Material Metal Pipes (quantity : min 2)
|ASTM/D6760 (2016) Standard Test Methods for Ultrasonic Crosshole Integrity Testing of Deep Foundations