A SOIL BORE-HOLE DIRECT-SHEAR TEST DEVICE

A RELATIVELY SIMPLE NEW DEVICE WAS DEVELOPED FOR MEASURING INTERNAL FRICTION AND COHESION IN SOILS. TWO CURVED CONTACT PLATES ARE EXPANDED INSIDE A BORE-HOLE. TO THE RESULTANT NORMAL STRESS ACHIEVED, A SHEARING STRESS IS APPLIED BY PULLING OR PUSHING THE EXPANDED DEVICE AXIALLY ALONG THE HOLE. THE RESULT IS ESSENTIALLY A DIRECT SHEAR TEST ON SOIL AT THE SIDES OF THE BORE-HOLE. FIELD TRIALS AND COMPARISONS TO LABORATORY TRIAXIAL AND DIRECT SHEAR DATA INDICATE THAT THE BORE-HOLE TESTS IN A SAND, A LOAM, SEVERAL SILTS AND A CLAY INDICATE CLOSE AGREEMENT WITH LABORATORY CONSOLIDATED- UNDRAINED TRIAXIAL AND/OR DIRECT SHEAR TEST DATA, AND COMPARABLE PRECISION. A COMPLETE DETERMINATION OF THE MAXIMUM SHEAR VS. NORMAL STRESS FAILURE ENVELOPE MAY BE MADE IN 15 MIN TO 1 HOUR, DEPENDING ON THE CONSOLIDATION TIME REQUIRED FOR A PARTICULAR SOIL.

• Record URL:
  • https://onlinepubs.trb.org/Onlinepubs/hrnews/hr-news-27-01.pdf
• Supplemental Notes:
  • No 27, pp 42-51, 6 FIG, 3 TAB, 5 REF. Distribution, posting, or copying of this PDF is strictly prohibited without written permission of the Transportation Research Board of the National Academy of Sciences. Unless otherwise indicated, all materials in this PDF are copyrighted by the National Academy of Sciences. Copyright © National Academy of Sciences. All rights reserved.
• Corporate Authors:

  Transportation Research Board

  500 Fifth Street, NW
  Washington, DC  United States  20001
• Authors:
  • Handy, R L
  • Fox, N S
• Publication Date: 1967

Language

• English

Media Info

• Media Type: Digital/other
• Pagination: pp 42-51
• Serial:
  • Highway Research News
  • Issue Number: 27

Subject/Index Terms

• TRT Terms: Alternatives analysis; Boreholes; Cohesion; Development; Direct shear tests; Expansion; Field tests; Internal friction; Laboratory tests; Measuring instruments; Shear stress; Soil tests; Soils; Structural plates; Triaxial shear tests
• Uncontrolled Terms: Plates
• Old TRIS Terms: Contact
• Subject Areas: Geotechnology; Highways;

Filing Info

• Accession Number: 00228927
• Record Type: Publication
• Files: TRIS, TRB
• Created Date: Aug 15 2004 1:48AM