Guided waves in embedded concrete piles

Richard J. Finno*, Hsiao Chou Chao

*Corresponding author for this work

Research output: Contribution to journalArticle

17 Scopus citations

Abstract

Results of a three dimensional (3D) guided wave evaluation of the stress waves generated by the impulse response method show that the conventional interpretation technique based on ID wave propagation theory is essentially a special application of the first branch of longitudinal wave modes with frequency components up to several thousand hertz. To extend the frequency range and incorporate special wave characteristics of higher modes so that the integrity of an embedded pile can be evaluated in a more thorough manner, a frequency-controlled method capable of exciting waveforms with higher and selective frequency components is introduced to nondestructively evaluate prototype concrete piles. Experimental results on a prototype pile are analyzed by processing the responding signals in the joint time-frequency domain, then comparing the processed waveforms with the theoretically computed results. These results show that the mode attributes of the experimentally excited waves are consistent with the results of theoretical evaluations. Based on this finding, this guided wave approach can be applied to evaluate the integrity of a drill shaft with appropriately determined parameters of the soil-pile system.

Original languageEnglish (US)
Pages (from-to)11-19
Number of pages9
JournalJournal of Geotechnical and Geoenvironmental Engineering
Volume131
Issue number1
DOIs
StatePublished - Jan 1 2005

Keywords

  • Concrete piles
  • Drilled shafts
  • Energy dissipation
  • Nondestructive tests
  • Wave propagation

ASJC Scopus subject areas

  • Geotechnical Engineering and Engineering Geology
  • Environmental Science(all)

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