DISCUSSION OF CONTROLLED GRADIENT CONSOLIDATION TEST

THE DISCUSSERS COMPLIMENT THE AUTHOR'S CONTRIBUTION TO THE STUDY OF CONSOLIDATION OF SOILS AND SETTLEMENT ANALYSIS FROM THE TRUE FIELD CONDITIONS. THEY AGREE THAT THE CONSOLIDATION TEST SHOULD SIMULATE AS CLOSELY AS POSSIBLE THE CONDITIONS WHICH EXIST FOR AN ELEMENT OF THE PROTOTYPE IN THE FIELD. IF A SOIL IS FULLY SATURATED IN ITS IN SITU CONDITION, USUALLY WHEN IT IS BELOW THE GROUNDWATER TABLE, TESTING IN THE LABORATORY SHOULD BE PERFORMED ON FULLY SATURATED SPECIMENS TO PROPERLY REPRODUCE FIELD CONDITIONS. THE PROBLEM IS DISCUSSED OF REMOVING A SAMPLE FROM THE GROUND IN WHICH THERE IS AN IMMEDIATE RELAXATION OF APPLIED STRESSES. THE APPLICATION OF THE BACK PRESSURE CAUSES GAS BUBBLES IN THE PORE SPACE TO BE REDISSOLVED IN THE PORE WATER. IF THE BACK PRESSURE IS MADE EQUAL TO THE IN SITU HYDROSTATIC PRESSURE, THE STRESS CONDITION WITHIN THE LIQUID PHASE OF THE SOIL IN SITU WILL BE SIMULATED. THIS WAS OBSERVED FROM TWO CONSOLIDATION TESTS WITH AND WITHOUT BACK PRESSURES ON AN UNDISTRUBED SAMPLE OF SILT SOIL MATERIAL. REPORTS ISSUED: CONTROLLED GRADIENT CONSOLIDATION TEST, JOHN LOWE III, ERNEST JONAS, VLADIMIR OBRICIAN, ASCE PROC. PAPER 6327, JANUARY 1969.

  • Supplemental Notes:
    • Vol 96, No SM 1, PP 307-308, REF, APP
  • Authors:
    • Majumdar, D K
    • Kalinoski, J J
  • Publication Date: 0

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Filing Info

  • Accession Number: 00229765
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Mar 25 1970 12:00AM