LONG-TERM PULLOUT BEHAVIOR OF POLYMERIC GEOGRIDS

Polymeric geogrids are widely used in engineering applications of a geotechnical, transportation, and environmental nature. Reinforced soil walls, steep slopes, and landfill expansions are among the major uses of geogrids. Current design practices are based on limit equilibrium techniques in which the geogrid is assumed to resist failure by mobilizing appropriate tensile resistance within the potential failure zone. In addition, the geogrid must extend a sufficient distance beyond the potential failure surface to ensure anchorage resistance and thus resistance to pullout failure. This paper concentrates on the anchorage behavior of geogrids under short- and long-term conditions. Five different geogrids in granular soil are tested under two different normal stresses. The geogrid length equals 0.9 m, which is often the requirement for the minimum anchorage length beyond the failure plane. Results are presented as load displacement curves and time displacement curves. Findings reveal that pullout strength after 1,000 hours sustained loading is equal to the short-term pullout strength provided sufficient length of the geogrid is available to mobilize its full strength and/or the structural integrity of the geogrid is maintained during pullout over its length.

Language

  • English

Media Info

  • Features: Appendices; Figures; References; Tables;
  • Pagination: p. 723-728
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00711633
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Sep 30 1995 12:00AM