Evaluation of concrete quality in deep foundations by the Crosshole Sonic Logging method (CSL)
Assesses concrete quality and consistency of drilled shafts, slurry walls, bored piles, cast-in-situ piles and other types of concrete foundations
Performs real-time analysis on site, as well as data transfer capability to a PC for further analysis with CHA-W reporting software
PDI-TOMO software available for superior tomographic results providing intuitive 3-D identification of questionable areas, as well as allowing for a quick and easy quantitative, comprehensive, engineering analysis
The Cross-Hole Analyzer evaluates the quality of the concrete of deep foundations by the Crosshole Sonic Logging (CSL) method. It also performs Single Hole Sonic Logging (SSL).
Receiver and Transmitter in Sturdy Brass Housing
The CHAMP-XV consists of a main unit with 60 GB internal solid state drive (SSD) and Windows 7 OS, a receiver and a transmitter in sturdy brass housing, two independent depth measuring devices, a tripod for assembling the test, and the powerful software CHA-W. Options include the Motorized Probe Deployment System that relieves the operator from pulling the cables manually, making testing more comfortable and the PDI-TOMO software.
Drilled shafts and other cast-in-place concrete foundations are prepared for the test by installation of PVC or steel tubes during their construction. During the test, a transmitter is lowered down one of the tubes and sends a high-frequency signal to a receiver inserted in another tube. Transmitter and receiver move down each pair of tubes, scanning the entire length of the shaft. Cables for the receiver and transmitter are available in various lengths, and may each be positioned at different depth levels for maximum testing flexibility.
The attractive enclosure of the CHAMP-XV cross-hole analyzer is still light and small, but its color touch-screen display is 5 cm larger than the previous model and visible in all lighting conditions. The replaceable internal battery frees the tester from a power source, allowing easy movement between shafts. This allows for essential analysis to be performed in the field in real time. In addition, data entry is optimized for speed of testing and to minimize erroneous input.
Field data is transferred to a computer through USB ports and further analyzed by the CHA-W software, which outputs graphs such as First Arrival Time, Wave Speed, Waterfall Diagram and Energy Plot, and aids in test report preparation.
The CHAMP-XV meets or exceeds the specifications for cross-hole sonic logging required by D6760 Standard Test Method for Integrity Testing of Concrete Deep Foundations by Ultrasonic Crosshole Testing.
CHA-W processes Cross-Hole Analyzer data. Its analysis tools include evaluation of signal strength, the helpful Edge Finder to detect the First Arrival Time (the moment the signal sent by the transmitter first reaches the receiver, also known as FAT) and Defect Analysis, a visual aid for easy defect identification. CHA-W reporting tools comprise user customized graphs and tables.
The mean and standard deviation of the measured wave speed and the location of defect is displayed. Graphs include signal strength versus time and depth (Sonic Map, also called Waterfall Diagram), FAT versus depth, wave speed versus depth and signal strength versus depth.