THE PRINCIPLE OF REINFORCED EARTH

REINFORCED EARTH IS A MATERIAL FORMED BY COMBINING EARTH AND REINFORCEMENT. IN ACTUAL CONSTRUCTION, THE REINFORCED EARTH STRUCTURES ARE COMPOSED OF EARTH AND REINFORCING ELEMENTS IN THE FORM OF STRIPS DISPOSED IN HORIZONTAL LAYERS. IN THESE LAYERS, THE STRIPS ARE SET AT CERTAIN INTERVALS. ON THE FACING OF THE STRUCTURE, A CERTAIN TYPE OF BOUNDARY, OR SKIN, IS REQUIRED TO RETAIN THE EARTH PARTICLES THAT ARE NOT IN CONTACT WITH REINFORCING STRIPS. THE COHESION OF REINFORCED EARTH ARISES FROM FRICTION OF GRAINS OF EARTH AGAINST THE REINFORCING MEMBERS. THERE IS A TRANSMISSION OF FORCES BY FRICTION BETWEEN THE GRAINS AND THE REINFORCEMENTS, INTRODUCING TRUE COHESION TO THE WHOLE MASS. THE STRESSES DEVELOPED IN THE REINFORCEMENT DEPEND ON THE SUM OF THE CONTACT ACTIONS BETWEEN THE EARTH PARTICLES. ONCE THE PROPER CONTACT BETWEEN EARTH AND REINFORCEMENT IS ESTABLISHED, THE PROBLEM BECOMES ONE OF CALCULATING THE STRESSES IN THE REINFORCEMENT AND IN THE EARTH. WHEN THESE STRESSES ARE KNOWN, ONLY A SIMPLE FORMULA IS NEEDED FOR COMPUTATION. THE PRINCIPAL CASES OF PURE COMPRESSION AND PURE TENSION ARE CALCULATED WITH THE SAME DEGREE OF ACCURACY AS FOR CONVENTIONAL STRUCTURES. SCALE MODELS ARE SIMPLE TO CONSTRUCT AND OFFER A VERY EFFECTIVE METHOD OF CHECKING THE THEORETICAL CALCULATIONS. FOR STRUCTURES OF ANY SHAPE, TWO METHODS OF DESIGN HAVE BEEN PREPARED. THESE METHODS ARE DESCRIBED. WHEN THESE TWO METHODS WERE APPLIED TO THE DESIGN OF THE SAME WORK, THE RESULTS WERE IN CLOSE AGREEMENT. BUILDING REINFORCED EARTH STRUCTURES IS SIMPLE AND FAST. BECAUSE OF ITS RELATIVE SIMPLICITY, THE ECONOMY ACHIEVED IN COMPARISON WITH CONCRETE IS GREAT. IN FRENCH HIGHWAY EXPERIENCE, REINFORCED EARTH STRUCTURES COST APPROXIMATELY HALF WHAT CONCRETE STRUCTURES WOULD HAVE COST FOR COMPARABLE USES. THERE IS NO HEIGHT LIMIT TO STRUCTURES MADE WITH THE REINFORCED EARTH PRINCIPLE, AND ITS ECONOMIC ADVANTAGE INCREASES WITH THE HEIGHT. THE REINFORCED EARTH PRINCIPLE AND ITS APPLICATIONS, ARE PATENTED IN THE UNITED STATES AND MOST OTHER COUNTRIES.

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  • Supplemental Notes:
    • Paper sponsored by Department of Soils, Geology and Foundations. Distribution, posting, or copying of this PDF is strictly prohibited without written permission of the Transportation Research Board of the National Academy of Sciences. Unless otherwise indicated, all materials in this PDF are copyrighted by the National Academy of Sciences. Copyright © National Academy of Sciences. All rights reserved
  • Authors:
    • Vidal, Henri
  • Publication Date: 1969

Media Info

  • Media Type: Print
  • Features: Figures;
  • Pagination: pp 1-16
  • Monograph Title: Soil theories: reinforced earth, displacements, bearing, and seepage
  • Serial:

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Filing Info

  • Accession Number: 00235555
  • Record Type: Publication
  • Files: TRIS, TRB
  • Created Date: Oct 21 1994 12:00AM