Standard: ASTM D6760
For Crosshole and Single Hole Sonic Logging
The Cross-Hole Analyzer determines the quality and consistency of the concrete of drilled shafts, slurry walls, bored piles, cast-in-situ piles and other types of concrete foundations. It may be used for crosshole sonic logging (CSL) of drilled shafts or single hole sonic logging (SSL) of smaller augered cast-in-place piles.
The tablet-like CHAMP-XV continues the tradition of light but rugged Cross-Hole Analyzers. Still small enough to be portable, the CHAMP-XV features a larger color LCD touch screen that is highly visible in all lighting conditions. Enhancements over previous models include a seamless top surface, replaceable battery, USB ports and Windows 7 operating system. Data entry has been optimized.
The CHAMP-XV performs essential real time analysis (waterfall diagram) on site. USB ports now make it simpler to transfer data to a computer for review and additional analysis with CHA-W and for report preparation.
Shafts that will be tested with a Cross-Hole Analyzer are built with steel (preferred for CSL) or PVC (required for SSL) tubes that span their length. A transmitter in one tube sends a high frequency signal that travels through the concrete and is detected by a receiver in another tube (or in the same tube for SSL). As these sensors are raised and/or lowered along the length of the foundation, the CHAMP-XV displays and records the strength of the received signal, as well as the time from signal emission to signal arrival at the receiver, versus depth. In CSL, scanning various tube combinations for the entire shaft allows evaluation of concrete quality and defect location along the length and by quadrant. Only one tube is used in SSL. The optional Motorized Probe Deployment System relieves the operator from pulling the cables manually, making testing more comfortable.