Various testing methods are available to determine the integrity of drilled shafts, which are Crosshole Sonic Logging (CSL), Gamma-Gamma testing, and Thermal Integrity Profiling (TIP). TIP is the preferred testing method, as it is done during the curing of the concrete and does not delay construction. Other methods are approved based on the priorities of the project. Bridge Division has developed a Special Specification for TIP testing titled “Thermal Integrity Profiler (TIP) Testing of Drilled Shafts.”

TIP or other integrity testing should be considered for use under one or more of the following conditions:

Number and frequency of tests is at discretion of foundation engineer and dependent on site specific conditions and redundancy designed into the foundation system.

Consult with the TxDOT Bridge Division Geotechnical Branch to determine if a specific project might be considered a candidate for TIP or other integrity testing.