Pile cross-hole sonic logging

Cross-hole sonic logging measures the ultrasonic transit time between preinstalled reservation tubes in order to assess concrete quality between these tubes.

Prior to pile casting, a number of sealed steel tubes are attached to the reinforcing cage. These tubes are then filled with water right before the test. During the test, two probes capable of transmitting acoustic energy are lowered in two adjacent tubes. Once the probes are at the bottom, a continuous series of measurements is made as the probes are raised up the tubes, providing a vertical profile of signal transit time and transferred energy between the two tubes.

The measurement is then repeated for each couple of tubes, yielding 3 profiles for 3 tubes, 6 profiles for 4 tubes, etc.

Contact us

We perform cross-hole logging following the French NF P 94-160-1 and the American D6760-16 standards.