EARTH PRESSURE AGAINST BRACED EXCAVATIONS

A SOLUTION IS PRESENTED FOR FINDING THE RESULTANT EARTH PRESSURE AGAINST BRACING USING THE LOGARITHMIC SPIRAL METHOD. THE SOLUTION CONSIDERS BOTH ADHESION AND FRICTION BETWEEN THE BRACING AND THE SOIL. THE ANALYSIS IS ON A TOTAL STRESS BASIS ONLY. THE SHEARING RESISTANCE OF THE SOIL IS BASED ON THE MOHR-COULOMB FAILURE CRITERION. THE SOLUTION IS OBTAINED BY TRIAL AND ERROR, USING A DIGITAL COMPUTER AND VARYING THE POSITION OF THE FAILURE SURFACE UNTIL MAXIMUM PRESSURE AGAINST THE BRACING IS OBTAINED. THE VARIABLES USED FOR THE SOLUTION ARE: THE ANGLE OF INTERNAL FRICTION OF THE SOIL, THE ANGLE OF WALL-FRICTION, THE RATIO OF THE DISTANCE FROM THE BOTTOM OF THE EXCAVATION TO THE POINT OF APPLICATION OF THE RESULTANT EARTH PRESSURE TO THE TOTAL HEIGHT OF THE VERTICAL FACE, AND THE PRODUCT OF THE UNIT WEIGHT OF THE SOIL AND THE TOTAL HEIGHT OF THE VERTICAL FACE. VALUES FOR THE MAGNITUDE OF THE RESULTANT EARTH THRUST ARE PRESENTED IN A TABLE.

  • Supplemental Notes:
    • Vol 95, No SM6, PP 1518-1584, 1 FIG, 1 TAB, 1 REF
  • Authors:
    • Kim, J S
    • Preber, T
  • Publication Date: 1969-11

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Filing Info

  • Accession Number: 00235581
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Feb 9 1970 12:00AM