INFLUENCE OF ROCK ANISOTROPY AND TIME-DEPENDENT DEFORMATION ON THE STRESS-RELIEF AND HIGH-MODULUS INCLUSION TECHNIQUES OF IN SITU STRESS DETERMINATION

TWO OF THE MOST POPULAR TECHNIQUES USED IN THE DETERMINATION OF IN SITU ROCK STRESSES ARE THE STRESS-RELIEF AND HIGH-MODULUS INCLUSION METHODS. DEFORMATION AND STRAINS OBSERVED IN THE MEASURING INSTRUMENTS ARE USUALLY INTERPRETED ON THE ASSUMPTION THAT THE ROCK BEHAVES AS A HOMOGENEOUS, ISOTROPIC, LINEARLY ELASTIC MEDIUM, A SITUATION WHICH IS NOT EVEN APPROXIMATELY CORRECT IN SOME PRACTICAL CASES. THIS PAPER PRESENTS A THEORETICAL ANALYSIS OF THE INFLUENCE OF' /1/ ROCK ANISTROPY, OF THE TRANSVERSELY ISOTROPIC KIND, ON THE THE ACCURACY OF VALUES OF IN SITU STRESSES DETERMINED FROM THE USUAL ISOTROPIC ANALYSIS AND /2/ TIME-DEPENDENT ROCK DEFORMATION, REPRESENTED AS LINEAR, ISOTROPIC, VISCOELASTIC CREEP, ON THE STRESSES DEVELOPED IN HIGH-MODULUS PLUGS. IT IS SHOWN THAT SIGNIFICANT ERRORS /OVER 50 PER CENT FOR ONE STRESS-RELIEF EXAMPLE CHOSEN/ MAY BE INTRODUCED BY NEGLECTING THESE FACTORS. /AUTHOR/

• Supplemental Notes:
  • No 402, pp 190-206, 5 FIG, 1 TAB, 8 REF, 2 APP
• Authors:
  • Berry, D S
  • Fairhurst, C
• Publication Date: 1965-10

Media Info

• Serial:
  • Am Soc Testing & Matls Spec Tech Publ

Subject/Index Terms

• TRT Terms: Anisotropy (Physics); Creep; Deformation; Field tests; Isotropy; Plugs (Fillers); Rocks; Stresses; Theory; Time; Viscoelasticity
• Old TRIS Terms: Anisotropy; Determination; Insitu methods
• Subject Areas: Geotechnology; Highways;

Filing Info

• Accession Number: 00234154
• Record Type: Publication
• Files: TRIS
• Created Date: Sep 5 1994 12:00AM