CONSTRUCTION PRACTICES AND DEFECTS IN DRILLED SHAFTS

Certain construction practices can lead to defects in drilled shafts. Defects can occur in the form of voids; degraded or debonded concrete; entrapped cuttings, slurry, or groundwater; and geometric errors. They are considered generically according to the place in the construction cycle at which the defect occurs: general defects, defects due to drilling, defects arising from casing management, defects arising from slurry management, and defects related to design. Examples are presented, and suggestions are made for post-construction integrity evaluation techniques that might be effective in locating a given defect and defining its extent. Methods are also suggested for avoiding defects, which often involve subtle factors. Because of modern construction techniques, experienced contractors, and knowledgeable inspectors, relatively few defective drilled shafts are currently constructed.

• Record URL:
  http://onlinepubs.trb.org/Onlinepubs/trr/1991/1331/1331-002.pdf
• Record URL:
  https://scholar.google.com/scholar_lookup?title=CONSTRUCTION+PRACTICES+AND+DEFECTS+IN+DRILLED+SHAFTS&author=M.+O%27Neill&publication_year=1991
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• Supplemental Notes:
  • This paper appears in Transportation Research Record No. 1331, Integrity Testing of Foundations 1991. Distribution, posting, or copying of this PDF is strictly prohibited without written permission of the Transportation Research Board of the National Academy of Sciences. Unless otherwise indicated, all materials in this PDF are copyrighted by the National Academy of Sciences. Copyright © National Academy of Sciences. All rights reserved
• Authors:
  • O'Neill, Michael W
• Publication Date: 1991

Media Info

• Features: Figures; References; Tables;
• Pagination: p. 6-14
• Monograph Title: Integrity testing of foundations, 1991
• Serial:
  • Transportation Research Record
  • Issue Number: 1331
  • Publisher: Transportation Research Board
  • ISSN: 0361-1981

Subject/Index Terms

• TRT Terms: Construction management; Defects; Evaluation; Prevention; Structural analysis
• Uncontrolled Terms: Drilled shafts; Structural integrity
• Old TRIS Terms: Post-construction
• Subject Areas: Construction; Highways; Security and Emergencies; I50: Construction and Supervision of Construction;

Filing Info

• Accession Number: 00622270
• Record Type: Publication
• ISBN: 0309051681
• Files: TRIS, TRB
• Created Date: May 31 1992 12:00AM