FORECASTING THE CONSOLIDATION RATE OF STRUCTURAL FOUNDATIONS. CHAPTERS 4 AND 5 /IN RUSSIAN/

CHAPTERS 4 AND 5 OF A BOOK ON THE CONSOLIDATION AND CREEP OF MULTI-LAYER SOILS DEAL WITH THE PROBLEM OF ACCELERATED CONSOLIDATION OF LOADED MUD LAYERS BY MEANS OF VERTICAL SAND DRAINS. TWO NEW CONCEPTS ARE INTRODUCED: (1) STRUCTURAL COMPRESSIVE STRENGTH OF THE SOIL FRAMEWORK, E.G. MAXIMUM COMPRESSIVE STRESS THAT THE FRAMEWORK CAN WITHSTAND BEFORE FAILURE, AND (2) LIMIT HYDRAULIC GRADIENT ABOVE WHICH THE WATER FLOW STOPS. VERTICAL SAND DRAINS CAN ONLY BE USED IN SATURATED CLAYEY AND PEATY SOIL WHICH IS SUBJECTED TO STRESSES HIGHER THAN ITS STRUCTURAL STRENGTH. STANDARD CONSOLIDATION EQUATIONS ARE USED IN CONJUNCTION WITH THE FOLLOWING FACTORS: CREEP OF THE SOIL FRAMEWORK AND COMPRESSIBILITY OF THE INTERSTITIAL FLUID DUE TO ENTRAINED GASES. SOME TERZAGHI ASSUMPTIONS ARE REEXAMINED, NOTABLY THAT OF THE INITIAL DISTRIBUTION OF INTERSTITIAL PRESSURE. AN EQUATION IS GIVEN EXPRESSING THE STATE OF THE COMPRESSIBLE INTERSTITAL LIQUID CONSISTING OF WATER AND ENTRAINED AIR TOGETHER WITH ANOTHER EQUATION EXPRESSING THE RHEOLOGICAL STATE OF THE FRAMEWORK TAKING CREEP INTO ACCOUNT. A DIFFERENTIAL EQUATION OF CONSOLIDATION IS DRAWN UP WHICH TAKES INTO ACCOUNT THE CREEP OF THE FRAMEWORK OF A POROUS MEDIUM FILLED WITH A LINEARLY COMPRESSIBLE LIQUID. THIS EQUATION CAN BE USED FOR VARIOUS LIMIT CONDITIONS. RELATIONS ARE PROPOSED BETWEEN STRESSES APPLIED AND SHORT-TERM INTERSTITIAL PRESSURE. THE CONSOLIDATION OF NON-SATURATED, DRAINED AND UNDRAINED SOILS IS ALSO EXAMINED, AND AN EXPERIMENTAL METHOD FOR DETERMINING CREEP PARAMETERS OF THE FRAMEWORK OUTLINED. /LCPC/RRL/

  • Supplemental Notes:
    • pp 76-156, 21 FIG, 6 TAB, 72 REF
  • Corporate Authors:

    Izdatelstvo Pit Stroitelstvu /Ussr

    ,    
  • Authors:
    • Tsytovich, N A
    • Zaretskii, Y K
    • Malyshev, M V
    • Abelev, M Y
  • Publication Date: 1967

Subject/Index Terms

Filing Info

  • Accession Number: 00234826
  • Record Type: Publication
  • Source Agency: Transport and Road Research Laboratory (TRRL)
  • Files: TRIS
  • Created Date: Oct 18 1971 12:00AM