PLACEMENT RATES FOR HIGHWAY EMBANKMENTS VOLUME 3: THEORETICAL BACKGROUND AND PROGRAMMED FORMULAE

THE GENERAL PRECOMPRESSION ANALYSIS FOR A HIGHWAY EMBANKMENT RESTING ON A SOFT SOIL CAN BE DIVIDED INTO FOUR PARTS WHICH DEAL WITH (A) THE INITIAL INCREASE IN PORE WATER PRESSURES DUE TO THE APPLICATION OF AN EMBANKMENT LOAD, (B) THE ASSOCIATED SETTLEMENTS, (C) THE PROCESS OF CONSOLIDATION, AND (D) THE STABILITY OF THE EMBANKMENT-FOUNDATION SYSTEM. THE FOUR PROBLEM AREAS ARE DESCRIBED, POSSIBLE APPROACHES REPORTED IN THE LITERATURE ARE INVESTIGATED, AND THE FORMULAE INCORPORATED INTO THE COMPUTER PROGRAMS ARE DERIVED. THE PORE WATER PRESSURES ARE COMPUTED BY USE OF SKEMPTON'S PORE PRESSURE COEFFICIENTS A AND B AND A SOLUTION FOR THE TOTAL STRESS DISTRIBUTION, ASSUMING LINEAR ELASTICITY AND PLANE STRAIN CONDITIONS. THE DISSIPATION OF EXCESS PORE WATER PRESSURES IS EVALUATED BY MEANS OF AN EXTENDED CONSOLIDATION THEORY, WHICH INCLUDES RADIAL FLOW TOWARD SAND DRAINS, VARIABLE COEFFICIENTS OF CONSOLIDATION, AND PARTIAL SATURATION. TOTAL SETTLEMENTS ARE COMPUTED ON THE BASIS OF CONSOLIDATION TEST RESULTS, EXCLUDING IMMEDIATE AND SECONDARY EFFECTS. THE STABILITY ANALYSIS IS PERFORMED IN TERMS OF TOTAL STRESSES, AND SHEAR STRENGTH INCREASES OF THE SOFT SOIL DUE TO CONSOLIDATION ARE TAKEN INTO ACCOUNT BY MEANS OF THE C/P RATIO.

  • Supplemental Notes:
    • Contract IHR-602
  • Corporate Authors:

    Northwestern University, Evanston

    Department of Industrial Engineering and Management Sciences
    Transportation Center, 1936 Sheridan Road
    Evanston, IL  United States  60208-4040
  • Authors:
    • Krizek, R J
    • Krugmann, P K
  • Publication Date: 1972-6

Media Info

  • Pagination: 261 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00214557
  • Record Type: Publication
  • Source Agency: Illinois Department of Transportation
  • Files: TRIS
  • Created Date: Jul 31 1974 12:00AM