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 DEVELOPED FROM MODEL PILE TESTS. A STUDY IS MADE TO DETERMINE THE QUALITATIVE AFFECTS THAT THE SOIL PARAMETERS HAVE ON THE PREDICTED CAPACITY. RESULTS 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 SHOWING AN APPARENT RELATIONSHIP BETWEEN THE FRICTION DAMPING PARAMETER AND THE PLASTICITY INDEX OF A CLAY SOIL. /AUTHOR/

  • Supplemental Notes:
    • Research RePT 125-5, 54 PP, 19 FIG, 4 TAB, 15 REF, 1 APP
  • Corporate Authors:

    Texas Transportation Institute

    Texas A&M University System, 1600 E Lamar Boulevard
    Arlington, TX  United States  76011
  • Authors:
    • Bartoskewitz, R E
    • Coyle, H M
  • Publication Date: 1970-12

Subject/Index Terms

Filing Info

  • Accession Number: 00209424
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Jun 22 1971 12:00AM