CABLE METHOD OF IN SITU ROCK TESTING

ONE OF THE PROBLEMS IN APPLYING LOADING TO MASSIVE ROCK IN SITU IS THE QUESTION OF OBTAINING A SUITABLE REACTION POINT. THIS IS OVERCOME USUALLY BY CONFINING SUCH TESTS TO TUNNELS OR SLITS IN ROCK. AN ALTERNATIVE METHOD SUGGESTED RELIES ON THE USE OF CABLES ANCHORED AT SOME DEPTH IN A BOREHOLE. WITH THIS ARRANGEMENT LARGE FORCES CAN BE APPLIED TO THE ROCK SURFACE DIRECTLY AND IN ANY DIRECTION DESIRABLE. IF TWO PARALLEL CABLES ARE USED FURTHER ADVANTAGES ACCRUE. THE VOLUME OF ROCK INFLUENCED BECOMES GREATER AND AN ADDITIONAL JACKING LOAD PARALLEL TO THE ROCK SURFACE CAN BE APPLIED BETWEEN THE 'HEADS'. THUS ANISOTROPY OF ROCK PROPERTIES CAN BE DETECTED AND IN THE LIMIT, BY CARRYING THE TEST TO FAILURE, THE SHEAR STRENGTH CAN BE FOUND. THE ANALYSIS, BASED ON THE BOUSSINESQ AND CERRUTTI SOLUTIONS, IS EXTENDED TO COVER THE CASE OF TRANSVERSE ISOTROPY AND PILOT FIELD TRIALS ARE DESCRIBED. /RRL/A/

  • Availability:
  • Supplemental Notes:
    • Vol 4, No 3, PP 273-300, 22 FIG, 1 TAB, 57 REF
  • Authors:
    • Zienkiewicz, O C
    • Stagg, K G
  • Publication Date: 1967-7

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 00234534
  • Record Type: Publication
  • Source Agency: Road Research Laboratory /UK
  • Files: TRIS
  • Created Date: Apr 10 1994 12:00AM