REPRODUCIBILITY OF JOINT ORIENTATION MEASUREMENTS IN ROCK

An investigation has been made into the reproducibility of measurement of joint orientation in rock. The rocks studied were sandstone, mudstone and limestone exposed in the kielder aqueduct tunnels; the same limestone exposed in a nearby quarry was also studied. It was found that for six observers measuring a 10M long scanline, the orientation of particular joints recorded can have a mean maximum variation of plus or minus 10 degrees for dip direction and plus or minus 5 degrees for dip angle without there being any real difference in the joint orientation. However, the joint orientation diagrams produced by the six observers were in broad general agreement, and allowed the major joint sets to be identified. When the effects of the observed variation were compared with the joint orientation rating adjustment in Bieniawski's rock mass classification it was seen that they were insignificant. However, the effects of variation need to be taken into account when dealing with the stability of individual blocks of rock. (Author/TRRL)

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/02667045
• Corporate Authors:

  Transport and Road Research Laboratory (TRRL)

  Wokingham, Berkshire  United Kingdom 
• Authors:
  • Ewan, V J
  • WEST, G
• Publication Date: 1981

Media Info

• Features: Figures; Photos; References; Tables;
• Pagination: 18 p.
• Serial:
  • Publication of: Transport and Road Research Laboratory
  • Publisher: Transport and Road Research Laboratory (TRRL)
  • ISSN: 0266-7045

Subject/Index Terms

• TRT Terms: Classification; Limestone; Mass; Measurement; Mudstones; Rock jointing; Rocks; Sandstones; Test procedures
• Uncontrolled Terms: Orientation; Reproducibility; Rock mass
• Old TRIS Terms: Rock joints
• ITRD Terms: 6427: Angle; 8513: Classification; 4098: Dip (geol); 4089: Joint (geomorphol); 4131: Limestone; 6136: Measurement; 4179: Mud; 5927: Reproducibility; 4154: Rock; 4104: Sandstone; 5783: Slope stability; 3374: Tunnel
• Subject Areas: Geotechnology; Highways;

Filing Info

• Accession Number: 00349542
• Record Type: Publication
• Source Agency: Transport Research Laboratory
• Report/Paper Numbers: NSR 702 Monograph
• Files: ITRD, TRIS
• Created Date: Jun 30 1982 12:00AM