A STUDY AND ANALYSIS OF TIMBER CRIB RETAINING WALLS

TIMBER CRIB RETAINING WALLS HAVE BEEN USED EXTENSIVELY FOR MANY YEARS, PARTICULARLY IN CONJUNCTION WITH LOGGING AND MINING ACTIVITIES IN THE PACIFIC NORTHWEST. ALTHOUGH OTHER KINDS OF RETAINING WALLS HAVE LARGELY REPLACED THE TIMBER CRIB FOR MANY USES, THE DEMAND FOR TIMBER CRIB WALLS IS GREAT ENOUGH TO JUSTIFY THE AVAILABILITY OF SEVEN BASIC WALL DESIGNS. COMPARISONS WERE MADE OF VARIOUS TYPES OF RETAINING WALLS, INCLUDING THE TIMBER CRIB, WITH RESPECT TO SITE ADAPTATION, MATERIALS, FOUNDATION SUPPORT AND ECONOMICS. MANY IN-SERVICE TIMBER CRIB AND OTHER TYPES OF WALLS WERE VISUALLY OBSERVED TO EVALUATE THEIR PERFORMANCE. CRIB-TYPE RETAINING WALLS ARE INFLUENCED BY A NUMBER OF SOIL-STRUCTURE INTERACTIONS ASSOCIATED WITH BOTH THE INTERNAL STRESSES AND EXTERNAL STABILITY OF THE RETAINING WALL. IN THIS STUDY, EARTH PRESSURE INSIDE THE TIMBER CRIBS AND THE RESULTING STRESSES IN THE CRIB MEMBERS AND CONNECTIONS HAVE BEEN CALCULATED USING BIN PRESSURE THEORY DEVELOPED BY JANSSEN. THEIR RESISTANCE TO SLIDING AND OVERTURNING WAS DETERMINED IN THE SAME MANNER AS FOR OTHER GRAVITY RETAINING WALLS. THE INFLUENCE OF DIFFERENTIAL SETTLEMENT WAS STUDIED. BECAUSE OF THE MYRIAD OF NAUTRALLY OCCURRING SOILS, FOR HYPOTHETICAL GROUPS OF SOILS CONSIDERED SUITABLE FOR RETAINING WALL CRIBFILL AND BACKFILL WERE USED. IN ORDER TO PREDICT THE RELATIVE PERFORMANCE OF THE TIMBER CRIB WALL DESIGNS, EACH DESIGN WAS COMPLETELY ANALYZED FOR INTERNAL STRESSES AND EXTERNAL STABILITY WITH EACH OF THE FOUR HYPOTHETICAL SOIL GROUPS. THE BACKFILL GEOMTERY WAS ALSO VARIED FROM A LEVEL TO A SLOPING BACKFILL. PERFORMANCE OF EACH OF THE WALL DESIGNS WAS THEN COMPARED AND CONCLUSIONS WERE DRAWN ABOUT THE CHARACTERISTICS AND PERFORMANCE OF THE VARIOUS WALL DESIGNS. /AUTHOR/

  • Supplemental Notes:
    • CIV ENG REPT NO 73-13 APP
  • Corporate Authors:

    University of Idaho, Moscow

    Moscow, ID  United States  83844
  • Authors:
    • SCHUSTER, R L
    • Jones, M V
    • Smart, S M
    • Sack, R L
  • Publication Date: 1973-4

Media Info

  • Features: Figures; References; Tables;
  • Pagination: 143 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00233424
  • Record Type: Publication
  • Files: TRIS
  • Created Date: May 15 1974 12:00AM