NONDESTRUCTIVE EVALUATION OF BRIDGE FOUNDATIONS

This paper focuses on the applications of new developments in stress wave techniques for the identification and quantification of defects in bridge foundations. The two methods discussed in this paper are Crosshole Sonic Logging (CSL) and Crosshole Tomography (CT). The Crosshole Sonic Logging method measures the travel time of stress waves as they travel between tubes or coreholes in concrete or stone structures. While CSL technology is very effective in detecting anomalies and defects, it also provides a good indication of defect size, position, and severity within a foundation. Crosshole Tomography is a technique that produces a "slice" or a plot of the concrete condition between the tubes. This plot clearly shows the defect size, severity, and position between the tubes. Crosshole Tomography uses multiple CSL logs taken around a defect and a powerful computer program to calculate the position and severity of the defect. Discussed in this paper are two case studies on two drilled shaft foundations in California, where Crosshole Sonic Logging and Crosshole Tomography tests were performed.

  • Corporate Authors:

    Technomic Publishing Company, Incorporated

    851 New Holland Avenue, Box 3535
    Lancaster, PA  United States  17604
  • Authors:
    • Aouad, M F
    • Olson, L D
  • Conference:
  • Publication Date: 1996

Language

  • English

Media Info

  • Features: Figures; References;
  • Pagination: p. 293-298

Subject/Index Terms

Filing Info

  • Accession Number: 00725893
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Sep 16 1996 12:00AM