A study was conducted in Taiwan of the quality control of drilled shafts using nondestructive testing. Ultrasonic borehole logging used for borehole quality control is introduced. Experiences from incorporation of nondestructive test methods into contract documents during the design phase, the use of a specification for acceptance of a pile during construction, and remedial measures are discussed. Three projects on quality control of drilled piles using nondestructive tests are evaluated. Interpretation based on the test results used to reach a decision for acceptance or rejection of a pile is discussed for the case studies.
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