LOWER AND UPPER BOUNDS FOR STABILITY OF EARTH-RETAINING STRUCTURES

TWO COLLAPSE THEOREMS OF PLASTICITY THEORY ARE APPLIED TO THE PLANE STRAIN CASE OF EARTH-RETAINING STRUCTURES. INTERNAL KINEMATIC CONDITIONS (FLOW RULES) ARE TAKEN INTO ACCOUNT. THE THEOREMS ARE FORMULATED FOR PURELY COHESIVE AND PURELY FRICTIONAL DILATING SOILS. FOR GETTING LOWER LIMITS USE IS MADE OF RECTILINEAR STRESS DISCONTINUITIES. FOR UPPER LIMITS, FAILURE MECHANISMS CONSISTING OF VELOCITY DISCONTINUITIES ARE PROPOSED. THE NECESSITY OF MORE REFINED FAILURE MECHANISMS THAN THE USUAL SLIP CIRCLE IS PROVED BY THE EXAMPLE OF AN ANCHORED BULKHEAD IN PURELY COHESIVE SOILS. FOR DILATING FRICTIONAL SOILS THE ADMISSIBLE SLIP LINES ARE STRAIGHT LINES OR SPIRALS. THE FRICTIONAL RESISTANCE DEPENDS ON THE ANGLE OF FRICTION AND THE ANGLE OF DILATANCY. THE INFLUENCE OF EXTERNAL AND INTERNAL KINEMATIC CONDITIONS IS SHOWN IN THREE SIMPLE EXAMPLES OF EARTH PRESSURE. FINALLY, TYPICAL FAILURE MECHANISMS FOR RETAINING WALLS WITH COHESIONLESS BACKFILL ARE PRESENTED. /TRRL/

Media Info

  • Features: Figures; References;
  • Pagination: p. 21-8

Subject/Index Terms

Filing Info

  • Accession Number: 00236945
  • Record Type: Publication
  • Source Agency: Transport and Road Research Laboratory (TRRL)
  • Report/Paper Numbers: Conf Paper
  • Files: TRIS
  • Created Date: Feb 19 1973 12:00AM