PILE-SOIL SYSTEM RESPONSE IN CLAY AS A FUNCTION OF EXCESS PORE WATER PRESSURE AND OTHER SOIL PROPERTIES

RESEARCH WAS CONCERNED WITH AN INSTRUMENTED FIELD TEST PILE USED TO INVESTIGATE THE FAILURE MECHANISMS WHICH ARE DEVELOPED IN CLAY SOILS SUBJECTED TO PILE DRIVING AND FOUNDATION LOADINGS. THE ULTIMATE LOAD RESPONSE OF THE PILE- SOIL SYSTEM WAS EVALUATED FOR BOTH DYNAMIC AND STATIC LOADING. A TEST PILE INSTRUMENTED WITH PRESSURE TRANDUCERS, STRAIN GAGES, AND ACCELEROMETERS WAS DRIVEN INTO A SATURATED CLAY AT A SITE IN BEAUMONT, TEXAS. STRAIN AND ACCELERATION MEASUREMENTS OF THE PILE WERE TAKEN DURING DRIVING. PORE PRESSURE MEASUREMENTS WERE MADE AT THE PILE-SOIL INTERFACE FOR A CONTINUOUS PERIOD OF 30 DAYS AFTER DRIVING. STRAIN MEASUREMENTS WERE MADE DURING STATIC LOAD TESTS AT 13 DAYS AND 30 DAYS AFTER DRIVING. SOIL BORINGS WERE MADE FOR THE IN-SITE, REMOLDED, AND RECONSOLIDATED CONDITIONS AND AT SPECIFIC RADIAL DISTANCES FROM THE PILE. CONVENTIONAL TESTS WERE CONDUCTED ON THE SOIL SAMPLES TO MEASURE THE CHANGES IN ENGINEERING PROPERTIES FOR THE DIFFERENT CONDITIONS. DETERMINATION WAS MADE OF THE MODE OF FAILURE DEVELOPED WHEN A STEEL PILE IS DRIVEN AND LOADED IN A COHESIVE SOIL. THE STATIC AND DYNAMIC LOAD RESPONSES FOR THE PILE-SOIL SYSTEM CONSIDERED ARE A FUNCTION PREDOMINANTLY OF THE SOIL PROPERTIES WITHIN THE REGION OF LOCAL SHEAR FAILURE. THE REGION OF LOCAL SHEAR FAILURE IS A FUNCTION OF THE PILE DIAMETER. IT WAS DETERMINED THAT MEASUREMENTS OF THE MAGNITUDE, DURATION, AND DISSIPATION PATTERNS OF EXCESS PORE WATER PRESSURES CAN BE USED TO INDICATE THE DIMENSIONAL EXTENT OF SOIL DISTURBANCE IN FAILURE MECHANISMS STUDIED OF SATURATED CLAYS. THE DIMENSIONAL EXTENT OF SOIL DISTURBANCE WHICH GOVERNS THE MAGNITUDE AND DURATION OF EXCESS PORE WATER PRESSURES WAS SHOWN TO BE A FUNCTION OF THE SQUARE OF THE RADIUS OF THE PILE.

  • Supplemental Notes:
    • No 33-8, 37 PP, 49 FIG, 39 REF, 5 APP
  • Corporate Authors:

    Texas Transportation Institute

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

    Department of Transportation

    1200 New Jersey Avenue, SE
    Washington, DC  USA  20590

    Federal Highway Administration

    1200 New Jersey Avenue, SE
    Washington, DC  USA  20590

    Bureau of Public Roads /US

    400 7th Street, SW
    Washington, DC  USA  20590
  • Authors:
    • Airhart, T P
    • Hirsch, T J
    • Coyle, H M
  • Publication Date: 1967-9

Subject/Index Terms

Filing Info

  • Accession Number: 00234333
  • Record Type: Publication
  • Files: TRIS, USDOT
  • Created Date: May 13 1994 12:00AM