ANALYSIS OF PILES IN SOIL UNDERGOING LATERAL MOVEMENT

The author, in the closure to the discussion of his paper observes that the simplified representation of the pile as a strip is commonly used in both elastic and subgrade reaction analyses of laterally loaded piles because of mathematical convenience. The pile-soil "stress," p, on any element is not a real stress but rather a traction which is determined by the requirements of compatibility of pile and soil displacements. It represents the resultant of all tractions acting on the element, e. g., in the case of a thin strip in a purely elastic soil, it is the resultant of equal compressive and tensile tractions in front of and behind the strip, respectively. The effect of pile shape could be incorporated into the analysis by introducing additional elements with corresponding tractions to represent, e. g. the sides of a rectangular pile. Additional compatibility equations may then be set up and solved for these tractions. However, preliminary analyses along these lines have shown that the decrease in deflection for normal piles is not great (less than 10 percent) and that only for piers would the effects of the sides be of practical significance. Comments are made on the discussers remarks about the value for Es. It is observed that despite the simplifications involved in the analysis, it has been found capable of producing load-deflection relationships which agree well with those observed in field and model tests. The suggestion that the finite element method gives a better simulation of the problem is not disputed provided that due caution is exercised in choosing the outer boundaries of the problem and in setting up a suitably accurate mesh.

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  • Supplemental Notes:
    • Paper presented may, 19738, by Harry G. Paulous Proceeding Paper 9740.
  • Corporate Authors:

    American Society of Civil Engineers

    345 East 47th Street
    New York, NY  USA  10017-2398
  • Discussers:
    • POULOS, H G
  • Publication Date: 1974-10

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  • Accession Number: 00265152
  • Record Type: Publication
  • Report/Paper Numbers: Proc Paper 10838 Proceeding
  • Files: TRIS
  • Created Date: Feb 11 1975 12:00AM