Stress and deflection measurement in subgrade materials

As part of a laboratory investigation into subgrade material behaviour under simulated wheel loading, an attempt was made to correlate deflections measured in a triaxial sample with the surface deflection of the prototype sand mass. The paper describes the procedures used to measure the deflections at various locations in both the triaxial sand sample and the sand mass. The high accuracy obtained in the triaxial sample measurements showed that, even with carefully controlled conditions, irregularities in the strain distribution still occur. Using small earth pressure cells, the measurement of pressures in the sand mass is described and the procedures necessary for obtaining realistic values are outlined. Typical results of measured pressures show that previously reported inconsistencies in earth pressure measurements can be overcome (A).

• Record URL:
  http://arrbknowledge.com
• Authors:
  • Lee, I K
  • Morgan, J R
• Conference:
  • Australian Road Research Board (ARRB) Conference, 3rd, 1966, Sydney
• Publication Date: 1966

Language

• English

Media Info

• Pagination: 1168-77
• Serial:
  • Volume: 3
  • Issue Number: 2

Subject/Index Terms

• TRT Terms: Deflection; Earth pressure; Measurement; Measuring instruments; Pressure gages; Sand; Stresses; Subgrade (Pavements); Triaxial shear tests
• ATRI Terms: Deflection; Earth pressure; Measurement; Measuring equipment; Pressuremeter; Sand; Stress; Subgrade; Triaxial test
• Subject Areas: Geotechnology; Highways; Pavements;

Filing Info

• Accession Number: 01441515
• Record Type: Publication
• Source Agency: ARRB
• Files: ATRI
• Created Date: Aug 24 2012 11:43PM