FINITE ELEMENT PROGRAM FEECON FOR UNDRAINED DEFORMATION ANALYSES OF GRANULAR EMBANKMENTS ON SOFT CLAY FOUNDATIONS

A FINITE ELEMENT ANALYSIS OF EMBANKMENT CONSTRUCTION (FEECON) WAS DEVELOPED TO ENABLE THE ENGINEER TO RATIONALLY ANALYZE THE STRESSES, PORE PRESSURES, AND UNDRAINED SHEAR DEFORMATIONS CAUSED BY RAPID CONSTRUCTION OF GRANULAR EMBANKMENTS IN A SERIES OF LIFTS PLACED ON SOFT CLAY FOUNDATION SOIL. ADDITIONAL LOADING COMMANDS ARE AVAILABLE IN FEECON TO ENABLE THE ANALYSIS OF OTHER TYPES OF ENGINEERING PROBLEMS, SUCH AS EXCAVATION. THIS TECHNIQUE DOES NOT CONSIDER DEFORMATIONS CAUSED BY CONSOLIDATION OF THE FOUNDATION OR BY CREEP. A CHOICE OF NONLINEAR, ISOTROPIC, ELASTIC STRESS-STRAIN DEFORMATION MODELS OF THE SOIL MATERIALS IS AVAILABLE TO REPRESENT THE UNDRAINED OR DRAINED SHEAR BEHAVIOR OF SOILS. TO DEMONSTRATE THE APPLICABILITY OF THE FEECON PROGRAM, THE SECOND STAGE CONSTRUCTION OF THE FORE RIVER TEST SECTION IN SOUTH PORTLAND, MAINE WAS ANALYZED. A GOOD AGREEMENT WAS OBTAINED WITH THE MOVEMENTS AND EXCESS PORE PRESSURES MEASURED IN THE FIELD. THE EXAMPLE ANALYSIS ALSO SHOWED THAT THE COMPUTED DEFORMATIONS CAN BE VERY SENSITIVE TO CHANGES IN SOME OF THE SOIL PARAMETERS, SUCH AS UNDRAINED SHEAR STRENGTH OF A SINGLE CLAY LAYER, BUT MAY BE INSENSITIVE TO OTHER MATERIAL PROPERTIES, SUCH AS THE INITIAL MODULUS OF THE FILL. /FHWA/

  • Supplemental Notes:
    • Contract No 1-1-1753
  • Corporate Authors:

    Massachusetts Institute of Technology

    Department of Civil Engineering, 77 Massachusetts Avenue
    Cambridge, MA  USA  02139

    Federal Highway Administration

    1200 New Jersey Avenue, SE
    Washington, DC  USA  20590
  • Authors:
    • SIMON, R M
    • Ladd, C C
    • Christian, J T
  • Publication Date: 1972-2

Media Info

  • Pagination: 100 p.
  • Serial:
    • Issue Number: 294

Subject/Index Terms

Filing Info

  • Accession Number: 00233745
  • Record Type: Publication
  • Source Agency: Federal Highway Administration
  • Files: TRIS, USDOT
  • Created Date: Apr 30 1973 12:00AM