Cross Hole Sonic Logging
The Cross Hole Sonic Logging test is performed to determine the quality and consistency of the concrete of bored cast-in-situ piles, drilled shafts, slurry walls, and other types of concrete foundations.
Once the concrete foundation is prepared with PVC or steel tubes during construction, transceivers are lowered into the access tubes and probe one will transmit a high frequency signal that travels through the concrete and is detected by the other probes which are acting as receivers. This action is repeated with the other probes being automatically configured as transmitters sequentially, allowing up to six profiles to be scanned with a single pull. As these sensors are raised and/or lowered along the length of the foundation, the CHAMP-Q displays and records the strength of the received signal, as well as the time from signal emission to signal arrival as a function of depth.
The data acquired is analysed further for the following
- 2D and 3D tomography for pile profile within the reinforcement cage
- Relative wave energy reduction and First Arrival Time (FAT) to classify the foundation pile as a) Acceptable, b) Conditionally acceptable and c) Highly abnormal as per DFI guidelines
SGES Experience/Credentials:
- 500+ bored cast-in-situ piles including infrastructure and real estate projects
- More than 20 PDCA/PDI certified engineers with Advanced and Expert Rating
