FACTORS AFFECTING COEFFICIENT OF EARTH PRESSURE KO

THE COEFFICIENT OF EARTH PRESSURE AT REST CAN BE ACCURATELY DETERMINED BY CONDUCTING CONSTANT STRESS RATIO TESTS IN THE TRIAXIAL APPARATUS (INTERPOLATION METHOD). THIS METHOD IS STRESS CONTROLLED AND THUS THE ERRORS IN STRAIN MEASUREMENTS DO NOT INTERFERE WITH THE TEST PROCEDURE AND CAN BE CORRECTED FOR AFTER THE TEST IS FINISHED. STRAINS IN A K SUB O TEST ARE COMPOSED OF ELASTIC COMPONENT CAUSING A DIAMETER DECREASE, AND SLIDING COMPONENT CAUSING A DIAMETER INCREASE. THE TWO COMPONENTS MUST BE EQUAL FOR NO LATERAL STRAIN CONDITION. THE RESULTS INDICATE THAT K SUB O INCREASES WITH: (1) THE INCREASE IN POROSITY, CRUSHING, AND THE MODULUS OF ELASTICITY OF THE MINERAL PARTICLES; AND (2) THE DECREASE IN THE TRUE ANGLE OF FRICTION BETWEEN THE PARTICLES. THE EFFECTS OF ALLOWING SMALL LATERAL STRAINS AND THE RESTRAINING DIRECTION ON THE VALUE OF K SUB O ARE EXAMINED. /ASCE/

  • Availability:
  • Supplemental Notes:
    • PROC PAPER 9863 2 APP
  • Authors:
    • ANDRAWES, K Z
    • EL-SOHBY, M A
  • Publication Date: 1973-7

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Filing Info

  • Accession Number: 00236699
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Jun 5 1974 12:00AM