ECONOMIC PILE TESTING

This article reviews two economical methods of testing the structural integrity of piles - sonic coring and vibration testing. Sonic coring is essentially a tool for measuring the integrity or homogeneity of the concrete. Recent developments in sonic coring have reduced the size of the probes to 25 mm diameter compared with the original 20 mm, automatically reducing the cost of the tubes. Sonic coring detects the following faults: honeycombing, necking of concrete, the presence of soil, clay or mud, and horizontal lenses of extraneous materials in the concrete if the probes are set at different levels. It does not, however, tell how the fault will affect pile behavior. The vibration test gives a twofold result by testing the concrete at high frequencies for structural integrity and by vibrating the soil-pile system together at low frequencies to give a measurement of stiffness which may be related to load/settlement test results. The cost of sonic coring and vibration testing is approximately 40-45 lb (93-104 dollars) per pile. They offer an opportunity of testing both the structural integrity of the concrete and the stiffness of a large number of piles in order to locate which piles, if any, are questionable and thus which piles need to be load-tested to prove their load carrying ability.

  • Availability:
  • Corporate Authors:

    Foundation Publications Limited

    7 Ongar Road
    Brentwood CM15 9AU, Essex,   England 
  • Authors:
    • DAVIS, A G
    • ROBERTSON, S A
  • Publication Date: 1975-5

Media Info

  • Features: Figures; References;
  • Pagination: p. 40-43
  • Serial:
    • GROUND ENGINEERING
    • Volume: 8
    • Issue Number: 3
    • Publisher: EMAP CONSTRUCT LIMITED
    • ISSN: 0017-4653

Subject/Index Terms

Filing Info

  • Accession Number: 00099001
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Nov 5 1975 12:00AM