THE SHEARING BEHAVIOR OF A JOINTED ROCK MODEL

THE MODEL WAS CONSTRUCTED FROM REGULAR SQUARE PRISMS MANUFACTURED FROM PLASTER MORTAR TO SIMULATE CLOSELY THE COMPRESSIVE AND TENSILE STRENGTH AND YOUNG'S MODULUS OF MOST ROCKS. DETAILS ARE GIVEN OF THE DIRECT SHEAR BOX USED IN THE TESTS AND THE SHEAR LOAD APPLIED. THE ORIENTATION OF THE JOINTS IN THE SHEAR BOX AND THE NORMAL STRESS LEVEL WERE THE TWO VARIABLE FACTORS. IN EACH TEST, THE LOAD-DISPLACEMENT CHARACTERISTICS AND THE SHEAR STRENGTH OF THE MODEL WERE MEASURED; THE DEVELOPMENT OF THE FAILURE MODE WAS RECORDED PHOTOGRAPHICALLY. SEVERAL TYPES OF FAILURE MODE WERE OBSERVED: SLIP ALONG A SINGLE JOINT PLANE, SLIP ALONG SEVERAL JOINT PLANES OF ONE JOINT SET, FORMATION OF A SLIP ZONE IN WHICH THE BLOCKS ROTATED, SHEAR FAILURE PASSING THROUGH THE PLASTER MATERIAL AND ALONG THE JOINT PLANES, AND CRUSHING OF THE PLASTER MATERIAL, WITH THE SPECIMEN BEING DISPLACED SIDEWAYS OUT OF THE SHEAR BOX. /TRRL/

  • Corporate Authors:

    Ground Engineering

    7 Ongar Road
    Brentwood CM15 9AU,   England 
  • Authors:
    • Walker, P E
  • Publication Date: 1972-3

Language

  • English

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 00236995
  • Record Type: Publication
  • Source Agency: Transport and Road Research Laboratory (TRRL)
  • Files: TRIS
  • Created Date: May 29 1973 12:00AM