FIELD OBSERVATIONS ON THE LOAD-STRAIN-TIME BEHAVIOUR OF GEOGRID REINFORCEMENT

Field data are reported that describe the load-strain-time relationship of geogrid reinforcement in a reinforced soil structure. The data are for a period exceeding 5 years and reveal a continued strain in the reinforcement, which occurs at nearly constant load. The response to loading is attributed to creep of the polymeric material. A comparison of the field data with laboratory isochronous load-strain curves, from rapid loading creep tests performed at a temperature similar to the mean annual temperature in the backfill soil, shows the curves describe very well the magnitude of creep strains observed in the field. Implications of the load-strain-time performance data are assessed with reference to the use in design of a tensile strength established from the rapid-loading creep test and wide-width strip test. The need to clarify, in design of polymeric reinforced soil structures, between a safe and allowable tensile strength is emphasized. (A)

• Corporate Authors:

  National Research Council of Canada

  1200 Montreal Road
  Ottawa, Ontario  Canada  K1A 0R6
• Authors:
  • FANNIN, R J
• Publication Date: 1994-8

Language

• English

Media Info

• Features: References;
• Pagination: p. 564-569
• Serial:
  • CANADIAN GEOTECHNICAL JOURNAL
  • Volume: 31/4
  • Publisher: National Research Council of Canada

Subject/Index Terms

• TRT Terms: Creep; Deformation; Geotextiles; Lattices; Mechanically stabilized earth; Strength of materials; Tension
• ITRD Terms: 4732: Creep (mater); 5595: Deformation; 4568: Geotextile; 3463: Lattice; 3349: Reinforced earth; 5544: Strength (mater); 5502: Tension
• Subject Areas: Geotechnology;

Filing Info

• Accession Number: 00780696
• Record Type: Publication
• Source Agency: Transportation Association of Canada (TAC)
• Files: ITRD
• Created Date: Jan 7 2000 12:00AM