FROM THEORY TO FIELD EXPERIENCE WITH THE NON-DESTRUCTIVE VIBRATION TESTING OF PILES

The paper gives a brief outline of the principle of a non-destructive pile testing method by vibration and presents a summary of the parameters which may be obtained from velocity response graphs for cylindrical concrete piles excited by a vibrator. Consideration of the behaviour of ideal piles provides a means of interpreting these parameters. The effect of important defects in piles on the shape of their response graphs is considered by computer analysis of an electrical analogue of their mechanical behaviour. Examples of vibration test results on piles at five sites are given (two in France and three in Great Britain). With a knowledge of the geotechnical conditions of the site and of the type of pile used, it is shown that information can be obtained from the vibration tests about the length and continuity of the piles, their concrete quality and the quality of the Anchorage of the pile in the ground. This information is obtained from comparison of test results across any given site, and not from unique tests. A correlation between measured pile head stiffness and pile shaft diameter is suggested for end bearing piles 5-15 M long passing through soft deposits. /Author/TRRL/

Media Info

  • Features: Figures; Photos; References; Tables;
  • Pagination: p. 571-593
  • Serial:
    • Volume: 57

Subject/Index Terms

Filing Info

  • Accession Number: 00096877
  • Record Type: Publication
  • Source Agency: Transport and Road Research Laboratory (TRRL)
  • Files: ITRD, TRIS
  • Created Date: Sep 30 1975 12:00AM