Impulse-Response Testing for Quality Assessment of Cast-In-Place Concrete Pile Foundations

Impulse-Response testing is a nondestructive test method which can be readily used for quality control and integrity assessment of cast-in-place concrete foundation piles. Two case studies are presented demonstrating how Impulse- Response was used to evaluate the installation and quality issues of auger cast-in-place (ACIP) piles and dry-cast concrete piles (i.e., Franki piles). In both case studies, the dynamic properties (e.g., dynamic stiffness and mobility response spectra) determined from testing were correlated to the observed condition of selected piles evaluated through boring, material sampling (i.e., core extraction and petrographic studies), and sub-surface assessment (i.e., excavation and examination). The results indicated that the test method was effective for identifying nonconformities in tested piles of different construction methods much more quickly and efficiently than physical sampling or excavation alone.



  • Finno, R. J., and Gassman, S. L., 1998, “Impulse response evaluation of drilled shafts.” J. Geotech. and Geoenvir. Engrg. , ASCE 123(10), pp 965-975.
  • ASTM D5882-16 Standard Test Method for Low Strain Impact Integrity Testing of Deep Foundations, ASTM International, West Conshohocken, PA, 2016,
  • ACI 228.2R-13 Report on Nondestructive Test Methods for Evaluation of Concrete in Structures, American Concrete Institute, Committee 228, Farmington Hills, MI, 2013.


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