Pile foundations cast in situ present a unique problem in non-destructive testing since only the top of the foundation is accessible even though the entire depth of the foundation is required to be tested. The problem is particularly acute in the case of deep pile foundations, and there is a keenly felt need in this field for a satisfactory non-destructive method of checking the concrete in the foundation. Of the many methods available for non-destructive testing of concrete, the ultrasonic pulse method is one which affords the possibility of checking the foundation at any desired depth. In the work reported in this paper, pipes 2.5cm in diameter were embedded along the depth of the foundation while it was being cast. The transmitting and receiving probes were introduced into the pipes, and a fluid was used for acoustic coupling between the transducers and pipes. Laboratory tests were conducted by simulating defects which normally occur in the field. Pile foundations were constructed, in which different types of defects were introduced. From ultrasonic tests conducted on these foundations it was found that these tests could indicate the existence of defects and distinguish between the regions of good concrete and of defective ones. The method can be used for testing pile foundations up to 75cm in diameter and 20M in depth.(a) /TRRL/

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  • Corporate Authors:

    Cement Marketing Company of India Limited

    Cement House, 121 Maharshi, Karve Road
    Bombay 400-020,   India 
  • Authors:
    • Rajagopalam, P R
    • PRAKASH, J
  • Publication Date: 1975-12

Media Info

  • Features: Figures; References; Tables;
  • Pagination: 4 p.
  • Serial:
    • Indian Concrete Journal
    • Volume: 49
    • Issue Number: 12
    • Publisher: Associated Cement Companies Limited
    • ISSN: 0019-4565

Subject/Index Terms

Filing Info

  • Accession Number: 00137739
  • Record Type: Publication
  • Source Agency: Transport and Road Research Laboratory (TRRL)
  • Files: ITRD, TRIS
  • Created Date: Apr 13 1977 12:00AM