Abstract
More than 400 friction piles of a highway bridge in northern China were detected by both acoustic transmission method and low strain reflection method,while the integrity levels of the piles were judged different by the two methods, they were finally identified by means of drilling core-taking or drilling television. The misjudgment of the acoustic transmission method and the low strain reflection method are counted, and classified statistics were conducted according to the location and type of defects, while the reasons of misjudgment are analyzed. Some suggestions for the comprehensive application of the acoustic transmission method and the low strain reflection method are put forward, which can be for the reference of the testing technician.
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