Abstract:
Quality control and integrity evaluation for cast in place foundations (e.g. augercast piles and drilled shafts) may be performed using several non-destructive test (NDT) methods including Thermal Integrity Profiling (TIP) and Crosshole Sonic Logging. For TIP testing, pile/shaft integrity is evaluated by measuring the temperature of hydrating cementitious material along with knowledge of pile/shaft installation details. For CSL testing, shaft integrity is evaluated by measuring the arrival time and energy of ultrasonic waves between two or more parallel access tubes cast within the shaft. This presentation provides a brief overview of the testing theory and project specific details before offering a comparative discussion of the integrity testing performed for several drilled shafts with a focus on the analysis considerations as well as the potential limitations and requirements of evaluating integrity.