EFFECT OF CONTINUOUS OVERLOAD ON A RETAINING WALL /IN RUSSIAN/

A SMALL-SCALE MODEL IS USED TO STUDY THE INFLUENCE OF AN EVENLY DISTRIBUTED OVERLOAD ON THE VALUES OF THE ACTIVE EARTH PRESSURE EXERTED ON A RETAINING WALL. THE VALUES ARE DETERMINED AS A FUNCTION OF THE MOISTURE CONTENT OF THE SOIL, THE PLACE OF APPLICATION OF THE OVERLOAD IN RELATION TO THE TOP OF THE WALL, AND DISPLACEMENTS OF THE WALL. THE LATTER, 190 CM. HIGH, RETAINS AN EMBANKMENT BUILT WITH FINE QUARTZ SAND. THE DRY SPECIFIC GRAVITY AND THE ANGLE OF INTERNAL FRICTION OF THE SAND USED ARE GIVEN. A SPECIAL DEVICE IMPOSES ON THE WALL CONTROLLED TRANSLATIONS WHICH ENABLE THE VARIATIONS IN ACTIVE EARTH PRESSURE TO BE STUDIED AS A FUNCTION OF THE DISPLACEMENT OF THE MODEL. THE FOLLOWING OBSERVATIONS WERE MADE: (1) EXPERIMENTAL DIAGRAMS OF ACTIVE EARTH PRESSURE DIFFER CONSIDERABLY FROM THOSE ESTABLISHED BY ANALYTICAL METHODS. THE SATURATION OF THE SOIL PLAYS ONLY A SMALL PART IN THE SHAPE OF THE CURVES, (2) INCREASES IN ACTIVE EARTH PRESSURE DUE TO THE STRESS ON THE SURFACE CAUSED BY A UNIFORM OVERLOAD ARE 20 TO 30 PER CENT HIGHER THAN THE VALUES OBTAINED WITH THE COULOMB THEORY, (3) THE INFLUENCE OF THE OVERLOAD IS A FUNCTION OF THE DEPTH AND IS NOT CONSTANT AS IS USUALLY ASSUMED IN CALCULATIONS, () THE OVERLOAD APPLIED BEHIND THE LIMIT OF THE SLIDING PRISM CONTRIBUTES SLIGHTLY TO THE REDUCTION IN THE ACTIVE EARTH PRESSURE ON THE UPPER PART OF THE WALL, (5) THE INFLUENCE OF THE OVERLOAD DIMINISHES PROPORTIONALLY TO THE DISPLACEMENTS OF THE WALL, LEADING TO A REDUCTION IN ACTIVE EARTH PRESSURE ON THE LOWER PART OF THE RETAINING WALL. /LCPC/RRL/

  • Supplemental Notes:
    • No 3, pp 8-10, 3 FIG, 1 TAB
  • Authors:
    • Vargin, M N
  • Publication Date: 1968

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Filing Info

  • Accession Number: 00234631
  • Record Type: Publication
  • Source Agency: Road Research Laboratory /UK
  • Files: TRIS
  • Created Date: Oct 10 1971 12:00AM