TRANSDUCERS FOR MEASUREMENT OF PILE FORCES

An aluminum load cell was designed and constructed for the purpose of measuring the peak force that is developed at the top of a pile during driving. The load cell can be used on square concrete piles up to 16-in. (410-mm) square. It contains 9 sensing elements distributed over the active area to accurately measure inclined or eccentric loadings. The load cell is relatively lightweight and portable, and was designed to interface with an electronic peak force readout unit that was designed and constructed on an earlier project. An alternate peak force transducing means was model tested in the laboratory and field tested on full-scale piles. The method utilizes encapsulated electric resistance strain gages rigidly bonded to the exterior pile surface with a rapid-setting epoxy. Test data consisting of driving records and maximum pile forces at the pile heads are presented for four 55-ft (17-m) long piles driven in soft silty clay. An example wave equation problem is presented to illustrate the application and use of the measured peak force. /Author/

  • Supplemental Notes:
    • Sponsored by Texas State Department of Highways and Public Transportation. Performed in cooperation with DOT, Federal Highway Administration.
  • Corporate Authors:

    Texas Transportation Institute

    Texas A&M University System, 1600 E Lamar Boulevard
    Arlington, TX  USA  76011
  • Authors:
    • Bartoskewitz, R E
    • Milberger, L J
    • Coyle, H M
  • Publication Date: 1977-3

Media Info

  • Features: Appendices; Figures; References;
  • Pagination: 68 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00165557
  • Record Type: Publication
  • Report/Paper Numbers: TTI-2-5-76-31-1F Final Rpt.
  • Contract Numbers: Res Study 2-5-76-31
  • Files: TRIS
  • Created Date: Jan 30 1978 12:00AM