THE EFFECT OF TEMPERATURE CHANGES DURING UNDRAINED TESTS

INCREASING THE TEMPERATURE OF A SATURATED SAMPLE OF SOIL WHILE PREVENTING DRAINAGE WILL RESULT IN AN INCREASE IN THE PORE-WATER PRESSURE IN THE SAMPLE. ASSUMING THAT THE ELECTRICAL FORCE FIELDS BETWEEN PARTICLES ARE MOST APPRECIABLY AFFECTED BY CHANGES IN TEMPERATURE, A RELATIONSHIP BETWEEN CHANGES IN TEMPERATURE AND CHANGES IN PORE-WATER PRESSURE HAS BEEN DERIVED WHICH IS IN GOOD AGREEMENT WITH EXPERIMENTAL DATA. THE ANALYSIS SHOWS THAT THE MOST SIGNIFICANT FACTOR IN THE RELATIONSHIP BETWEEN TEMPERATURE AND PORE PRESSURE IN SAMPLES DURING TEMPERATURE INCREASE IS THE SLOPE OF THE SWELLING CURVE FOR THE SOIL. SOILS WHICH SWELL THE LEAST FOR A GIVEN PERCENT REDUCTION IN EFFECTIVE STRESS ARE THE ONES WHICH WILL UNDERGO THE GREATEST INCREASE IN PORE PRESSURE FOR A GIVEN INCREASE IN TEMPERATURE. THE INCREASE IN PORE PRESSURE CAUSED BY INCREASE IN TEMPERATURE RESULTS IN A DECREASE IN UNDRAINED STRENGTH, JUST AS AN INCREASE IN PORE PRESSURE DUE TO DISTURBANCE RESULTS IN A DECREASE IN STRENGTH. THE DERIVED RELATIONSHIP MAY BE USED TO CALCULATE THE CHANGE IN EFFECTIVE STRESS ASSOCIATED WITH THE CHANGE IN TEMPERATURE FROM FIELD TO LABORATORY. IT MAY ALSO BE USED TO CALCULATE THE ACCEPTABLE RANGE OF FLUCTUATION IN LABORATORY TEMPERATURE FOR UNDRAINED TESTS ON ANY SOIL. /AUTHOR/

  • Supplemental Notes:
    • Rept No Te-65-10, 23 PP
  • Corporate Authors:

    University of California, Berkeley

    Soil Mechanics and Bituminous Materials Research Laboratory
    Berkeley, CA  United States 
  • Authors:
    • Duncan, J M
    • Campanella, R G
  • Publication Date: 0

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Filing Info

  • Accession Number: 00229011
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Aug 15 2004 2:11AM