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.

• Supplemental Notes:
  • No 27, pp 42-51, 6 FIG, 3 TAB, 5 REF
• 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

• Serial:
  • Highway Research News

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