COMPRESSION CHARACTERISTICS OF SPREAD FILLS FROM BLAST ROCK SETTLEMENTS OF FOOTINGS

FILLS OF BLAST ROCK, WHICH FOR MANY YEARS HAVE BEEN USED IN DAM CONSTRUCTION, HAVE RECENTLY BEEN FOUND TO BE OF GREAT VALUE IN HIGHWAY CONSTRUCTION AND LAND LEVELLING OPERATIONS. TODAY, WITH THE FREQUENT FOUNDATION OF BUILDINGS ON COMPACTED ROCKFILLS, THE NEED FOR KNOWLEDGE ABOUT DEFORMATION PROPERTIES OF THIS TYPE OF FILLS HAS INCREASED. THE REPORT CONTAINS A BRIEF REVIEW OF LITERATURE ON THE SUBJECT. VERY FEW EXPERIMENTS WITH IN-SITU CAST CONCRETE FOOTINGS ON FILLS OF BLAST ROCK HAVE BEEN MADE TO DATE. IT APPEARS THAT THE GRAIN SIZE, THE VOID RATIO AND THE SHAPE OF THE GRAIN ARE SIGNIFICANT FACTORS FOR THE FORCES IN A GRAIN SKELETON. DEFORMATION OCCURS AT THE POINTS OF CONTACT AND MAY BE ELASTOPLASTIC OR SIMPLY THE RESULT OF CRUSHING AND REARRANGEMENT OF GRAINS. THE SUITABILITY OF DIFFERENT TYPES OF ROCK FOR USE AS FILL IS DISCUSSED IN THE LIGHT OF THE MECHANICAL EFFECT. OBSERVATIONS ON SETTLEMENT IN SPREAD FILLS OF BLAST ROCK ARE EXAMINED IN THE REPORT, ALTHOUGH THE NUMBER OF THESE OBSERVATIONS IS VERY LIMITED. THE AUTHOR'S OWN EXPERIMENTS INCLUDED STUDY OF THE FRACTURING PROCESS IN A ROCK CONTACT SUBJECTED TO LOAD, STUDY OF COMPRESSION PROPERTIES IN ROCK FILL WITH GRAINS ONE TENTH THE FIELD SIZE, AND MODEL TESTS ON SETTLEMENT IN A FOOTING. /AUTHOR/

  • Corporate Authors:

    Nat Swedish Building Res Summaries

    ,    
  • Authors:
    • Lindblom, U
  • Publication Date: 1973

Media Info

  • Features: Figures;
  • Pagination: 176 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00236519
  • Record Type: Publication
  • Source Agency: Nat Swedish Inst Building Research
  • Report/Paper Numbers: R12: 1973
  • Files: TRIS
  • Created Date: Sep 17 1973 12:00AM