Cross-Hole Sonic Logging Test

Cross-hole sonic logging (CSL) is one of several methods which are employed to assess the integrity of cast-in-situ piles. CSL is an indirect integrity evaluation method which needs interpretation. The testing is carried out following the guidelines outlined in ASTM-D6760 using the Pile Dynamics Inc. Cross Hole Analyzer device.

During the construction, closed ended PVC or steel tubes are installed around the inner perimeter of the steel reinforcement cage. The transceivers are then simultaneously lowered into a pair of access tubes. The first probe transmits a high-frequency signal that travels through the concrete and is detected by the second probe acting as a receiver. As the sensors move up and down along the foundation's length, the device records and displays the energy of the received signal and the time it takes for the signal to travel from emission to arrival as a function of depth. 

The quality of the concrete and the presence of any defects or anomalies in the concrete column can be evaluated based on the transmission time (the first arrival time, or FAT), and the relative proportion of the transmitted energy which is received. 

Pile QA has extensive experience with the data collection and interpretation of various integrity test methods for deep foundations. Depending on the region and your need, we may provide different combination of services including: total data collection by our trained personnel, provide testing equipment for hire, analysis, interpretation and reporting. Even if you are a new born testing consultant or if you are a piling contractor starting to have your in-house testing department, we stand by your side by training and supervising your own personnel.

Pile QA is not just a professional piling and testing consultant, but also is structured to serve you at all levels as your back-office engineering support. Write to us about your projects or personnel requirements and we will get back to you with a fair solution!

*Training, Analysis and Reporting are provided worldwide. Please check if data collection and hiring services are available in your area. Terms and conditions apply.


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