The paper describes a method of analysing the magnitude and rate of reduction of negative skin friction on piles. The method combines a pile-soil interaction analysis (based on elastic theory) with a diffusion analysis for pore water flow under an electrical gradient. The method has been applied to predict the behaviour of a pile subjected to electro-osmosis in two cases: (I) a full-scale field trial carried out in Boston some years ago in which one pile in a group supporting a bridge abutment was cut, released from the pile cap and then subjected to electro-osmosis. "class a" predictions were made of the pile deflection at various stages in the trial, and comparisons are described between the predictions and the measurements. (II) a laboratory model test, in which negative friction has been induced in a pile by consolidation of the surrounding soil and then brief periods of electro-osmotic treatment have been applied to the pile. Prediction of the downdrag load versus time relationship are compared with the observed relationships (A). (TRRL)

  • Corporate Authors:

    University of Sydney

    School of Civil Engineering, Parramatta Road
    Sydney, New South Wales  Australia  2006
  • Authors:
    • Davis, E H
    • POULOS, H G
  • Publication Date: 1980-5

Media Info

  • Features: Figures; References; Tables;
  • Pagination: 30 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00325314
  • Record Type: Publication
  • Source Agency: ARRB
  • Report/Paper Numbers: Res Rpt. No. R 367
  • Files: ITRD, TRIS
  • Created Date: May 21 1981 12:00AM