A design (includes electrical and mechanical strain gauges) for instrumenting steel H piles to measure forces due to downdrag is presented which is sufficiently general to be adapted to many locations. The mechanism by which bitumen reduces downdrag is discussed, and the design of a bitumen layer for one installation is described. A bitumen layer 5 mm thick is considered a minimum for a slip layer for conditions in which 3 inches of settlement could occur in 10 days, and the maximum force in the pile is limited to 4 tons. Handling, storage and the pile driving aspects are considered, and comments are made on selecting the bitumen. Bitumen meeting the requirements can be produced by heating a soft asphalt and blowing air through it.

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  • Supplemental Notes:
    • This research sponsored by the Joint Highway Research Advisory Council of the University of Connecticut and the Connecticut Department of Transportation.
  • Corporate Authors:

    University of Connecticut, Storrs

    Department of Civil and Environmental Engineering, 261 Glenbrook Road
    Storrs, CT  United States  06269-2037
  • Authors:
    • Long, R P
  • Publication Date: 1976-2

Media Info

  • Features: Figures; References; Tables;
  • Pagination: 26 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00152492
  • Record Type: Publication
  • Report/Paper Numbers: Final Rpt.
  • Files: TRIS
  • Created Date: Aug 31 1977 12:00AM