AN INVESTIGATION OF THE THREE-DIMENSIONAL CREEP PROPERTIES OF CLAY

THE STRAIN-LOG TIME CURVE FOR AN INCREMENT IN DEVIATOR STRESS UNDER UNDRAINED TRIAXIAL COMPRESSION CONDITIONS IS SHOWN TO BE ESSENTIALLY A STRAIGHT LINE OVER MOST OF THE RANGE. THE SLOPE INCREASES RAPIDLY AS THE EFFECTIVE STRESS RATIO INCREASES FROM THE KO CONDITION TO FAILURE. IF THE INCREMENT IS PRECEDED BY EITHER SECONDARY CONSOLIDATION OR A PROLONGED STRAIN UNDER A LOWER DEVIATOR STRESS, THE STRAINS AND PORE PRESSURES IN THE EARLY STAGES ARE CONSIDERABLY REDUCED AND A 'DELAY' IS INTRODUCED BEFORE THE LINEAR RELATIONSHIP IS ESTABLISHED. THIS BEHAVIOR IS SHOWN TO BE A FUNCTION OF PREVIOUS STRAIN RATHER THAN OF TIME. THE EFFECTIVE STRESS RATIO-STRAIN CURVE IS SHOWN TO BE INDEPENDENT OF LOADING PROCEDURE TO A FIRST APPROXIMATION. FINALLY A MODEL IS PRESENTED WHICH ATTEMPTS TO TAKE THE OBSERVED PROPERTIES INTO ACCOUNT. /AUTHOR/

• Authors:
  • Newland, P L
• Publication Date: 1971

Language

• English

Media Info

• Features: Figures; References;
• Pagination: p. 132-7
• Serial:
  • Proc Aust-n.Z. Conf Geomech /Australia/
  • Volume: 1

Subject/Index Terms

• TRT Terms: Clay; Compression; Deformation; Deformation curve; Stress ratio; Time; Triaxial shear tests
• Uncontrolled Terms: Triaxial compression
• Old TRIS Terms: Time factor
• Subject Areas: Geotechnology; Highways;

Filing Info

• Accession Number: 00237057
• Record Type: Publication
• Source Agency: Transport and Road Research Laboratory (TRRL)
• Report/Paper Numbers: Conf Paper
• Files: TRIS
• Created Date: Nov 18 1973 12:00AM