125-5 "WAVE EQUATION PREDICTION OF PILE BEARING CAPACITY COMPARED WITH FIELD TEST RESULTS"

THE BEARING CAPACITIES OF FULL-SCALE INSTRUMENTED FRICTION PILES IN CLAY ARE PREDICTED BY USING A NUMERICAL METHOD FOR SOLVING THE ONE DIMENSIONAL WAVE-EQUATION. THE PREDICTED CAPACITIES ARE COMPARED WITH FIELD DATA FROM STATIC LOAD TESTS. THE RESULTS OBTAINED BY USING CURRENTLY ACCEPTED SOIL PARAMETERS, WHICH CHARACTERIZE THE DYNAMIC RESPONSE OF A SOIL TO IMPACT LOADING, ARE COMPARED TO THOSE ATTAINED BY USING SOIL PARAMETERS WHICH WERE RECENTLY DEVELOPED FROM MODEL PILE TESTS. A STUDY IS MADE TO DETERMINE THE QUALITATIVE EFFECTS THAT THE SOIL PARAMETERS HAVE ON THE PREDICTED CAPACITY. RESULTS OF THE PARAMETER STUDY INDICATE THAT THE RATIO OF POINT LOAD TO TOTAL LOAD HAS A SIGNIFICANT INFLUENCE ON THE ACCURACY OF THE PREDICTED PILE CAPACITY. CONVERSELY, THE SOIL QUAKE, THE TIP DAMPING PARAMETER, AND THE DISTRIBUTION OF FRICTIONAL SOIL RESISTANCE DO NOT HAVE A SIGNIFICANT INFLUENCE ON THE PREDICTED CAPACITY. WAVE EQUATION ANALYSES OF DATA FROM FULL-SCALE PILE TESTS AT THREE DIFFERENT LOCATIONS SHOW THAT A SINGLE VALUE FOR THE FRICTION DAMPING PARAMETER WILL NOT YIELD AN ACCURATE PREDICTED CAPACITY FOR ALL CLAY SOILS. DATA ARE PRESENTED WHICH SHOW AN APPARENT RELATIONSHIP BETWEEN THE FRICTION DAMPING PARAMETER AND THE PLASTICITY INDEX OF A CLAY SOIL. /AUTHOR/

  • Corporate Authors:

    Texas Transportation Institute

    Texas A&M University System, 1600 E Lamar Boulevard
    Arlington, TX  United States  76011

    Texas State Department of Highways & Public Transp

    11th and Brazos Streets
    Austin, TX  United States  78701

    Federal Highway Administration

    1200 New Jersey Avenue, SE
    Washington, DC  United States  20590
  • Authors:
    • Bartoskewitz, R B
    • Coyle, H M
  • Publication Date: 0

Subject/Index Terms

Filing Info

  • Accession Number: 00230733
  • Record Type: Publication
  • Source Agency: Federal Highway Administration
  • Files: TRIS, USDOT, STATEDOT
  • Created Date: Apr 1 1971 12:00AM