REINFORCED EARTH AS A HIGHWAY STRUCTURE

IT IS BELIEVED THAT REINFORCED EARTH OFFERS ANOTHER DESIGN OF RETAINED FILL SECTIONS WHICH CAN BE ECONOMICAL, EXTREMELY FLEXIBLE AS TO FOUNDATION SUPPORT, QUICK AND EASY TO CONSTRUCT AND ESTHETICALLY PLEASING TO THE TRAVELLER. REINFORCED EARTH IS A PATENTED PROCESS IN WHICH STRIPS OF METAL USUALLY 0.125-INCH THICK BY 2.25. INCHES WIDE, ARE STRATEGICALLY PLACED WITHIN A MASS OF ESSENTIALLY GRANULAR SOIL TO FORM A GRAVITY SECTION CAPABLE OF WITHSTANDING VERY HIGH EXTERNAL LOADINGS. GRANULAR MATERIALS WORK BEST BECAUSE OF THEIR ABILITY TO ACTIVATE SUFFICIENT FRICTIONAL RESISTANCE WITHIN THE SOIL TO DEVELOP TENSION ALONG THE THIN LONGITUDINAL REINFORCING MEMBERS WITHOUT CAUSING SHEAR OF THE SOIL. DESIGNS ARE BASED ON A MINIMUM QUANTITY OF BACKFILL MATERIALS OR AN ANGLE OF INTERNAL FRICTION OF AT LEAST 25 DEGREES AND A MAXIMUM AMOUNT OF FINES OF 15 PERCENT. DEVIATION FROM THIS CRITERIA SHOULD BE ATTEMPTED ONLY WITH DETAILED EVALUATION BY FIELD TESTING. REINFORCED EARTH WALLS ARE DESIGNED (BY NORMAL SOIL MECHANICS PROCEDURES) FOR TWO CONDITIONS OF STABILITY: (1) THE INTERNAL STABILITY OF THE REINFORCED MASS; AND (2) THE EXTERNAL STABILITY OF THE GRAVITY SECTION OR BEARING CAPACITY, OVERTURNING, SLIDING OF FOUNDATION SOILS. THE RESPECTIVE MERITS OF METAL FACING AND CONCRETE FACE BLOCKS ARE DISCUSSED. REINFORCED EARTH WALL PROJECTS IN CALIFORNIA, GEORGIA, AND ALABAMA ARE DESCRIBED AND COST DATA ARE PRESENTED. FIGURES ILLUSTRATE SECTIONAL VIEWS.

  • Authors:
    • Gedney, D S
  • Publication Date: 1972-11-28

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  • Accession Number: 00236504
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Nov 18 1973 12:00AM