High-strain dynamic testing is performed by obtaining and analyzing records of shaft force and velocity under drop weight impacts for evaluations of pile load carrying capacity, structural integrity, and load-movement and pile-soil load transfer relationship. High-strain dynamic testing is a non-destructive quick test and it is intended that the test pile be left in a condition suitable for use in production.
Due to the inherit uncertainties in design and construction methods, the impossibility and/or inadequacy of visual inspection, and the technical and economic limitations of conventional static loading tests, high strain dynamic testing methods for quality control and quality assurance of deep foundations are now being applied worldwide. This method coupled with its sophisticated software (CAPWAP) is proven to be faster and more economical than the conventional static load testing.
Many codes, specifications, and guidelines in effect in many countries worldwide cover dynamic testing and evaluation methods of deep foundations. The following is a short list: