VISCOUS EFFECTS OBSERVED IN TESTS ON AN ANISOTROPICALLY NORMALLY CONSOLIDATED SILTY CLAY. TECHNICAL NOTE

Research is reported that provides quantitative evidence, for a silty clay, that the undrained shear behavior of cohesive soils is rate-dependent. A method, in qualitative terms, is suggested for modelling the general viscoelastic behavior of soils. Undrained triaxial tests were performed at a range of strain rates on specimens of an anisotropically normally consolidated silty clay derived from keuper marl. The results from these tests were used to formulate a simple model based on critical state soil mechanics concepts. The study found that the strength of K sub o anisotropically consolidated triaxial specimens of silty clay was dependent on the rate at which the test was performed. The concept of a viscous yield locus was postulated. This surface exists simulataneously with the static yield locus. The concept of viscous plasticity is found to be useful in understanding the behavior of fine-grained soils during cyclic loading in which viscous effects are important.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/00168505
• Corporate Authors:

  Institution of Civil Engineers

  One Great George Street, Westminster
  London,   United Kingdom  SW1P 3AA
• Authors:
  • O'REILLY, M P
  • BROWN, S F
  • Overy, R F
• Publication Date: 1989-3

Media Info

• Features: Figures; References; Tables;
• Pagination: p. 153-158
• Serial:
  • GEOTECHNIQUE
  • Volume: 39
  • Issue Number: 1
  • Publisher: Thomas Telford Limited
  • ISSN: 0016-8505

Subject/Index Terms

• TRT Terms: Anisotropy; Cohesive soils; Fine grained soils; Mechanical strain; Repeated loads; Silty clays; Soil mechanics; Triaxial shear tests; Undrained shear strength; Viscosity
• Uncontrolled Terms: Strain rate
• Old TRIS Terms: Anisotropy; Consolidated deposits; Soil behavior
• Subject Areas: Geotechnology; Highways; I42: Soil Mechanics;

Filing Info

• Accession Number: 00485070
• Record Type: Publication
• Files: TRIS
• Created Date: Jun 30 1989 12:00AM