To determine soil-geotextile bond the engineer has, at present, two main test techniques -the shear box and the pull-out test. A comparison of results for these two techniques has been made for three geotextiles -two fabrics and one geogrid -that have been used in the United Kingdom as soil reinforcement. Four test techniques have been employed with three of these being based on the shear box and the fourth technique being a pull-out test. The 300 mm x 300 mm shear box has been used in the fixed shear mode where the geotextile is bonded to a rigid base plate and the free shear mode where the geotextile is clamped to one end of the lower half of the shear box with soil above and below. Use of the 60 mm x 60 mm shear box has been limited to the fixed shear mode, analysis of the test results for any one geotextile show that the shear box results are in good agreement with one another. In most cases the angle of bond stress has been found to be independent of normal stress level. A quite different result was obtained for the pull-out test where the angle of bond stress was found to decrease with increasing normal stress level. The results are discussed in detail and it is concludes that although the shear box technique might prove useful as an index test the pull-out test, even with only qualitative interpretation, is the most suitable for systems testing by virtue of its ability to detect faults in the structure of the geotextile. (Author/TRRL)

  • Availability:
  • Corporate Authors:

    Foundation Publications Limited

    7 Ongar Road
    Brentwood CM15 9AU, Essex,   England 
  • Authors:
    • INGOLD, T S
  • Publication Date: 1984-11

Media Info

  • Features: Figures; Photos; References;
  • Pagination: v.p.
  • Serial:
    • Volume: 17
    • Issue Number: 8
    • ISSN: 0017-4653

Subject/Index Terms

Filing Info

  • Accession Number: 00396192
  • Record Type: Publication
  • Source Agency: Transport Research Laboratory
  • Files: ITRD, TRIS
  • Created Date: Jan 31 1986 12:00AM