GEOGRIDS AS A REINFORCEMENT METHOD

JORDFOERSTAERKNING MED GEONAET

The purpose of this work has been to study geogrids as a reinforcement method. Geogrids have principally been examined in steep slopes and under asphalt surface on weak ground. Soil armament with geogrids has been used abroad and has undergone a refinement since the 1950:s, but it has not until now started to be in common use in Sweden. Steel strips, aluminium strips and so-called geogrids of polymers are being used for armament, the latter being the most common material today. In some cases, strong geoclothes of synthetic material are being used. There is a range of different testing-methods, which can give large differences in test results. It is above all the deformation speed that determines which break strength one can achieve. The difference in testing speed is a problem today. It varies between 2% and 100% per minute for different products, which creates uncertainties and different possibilities for interpretation at dimensioning. If all products were to be tested with the same deformation speed, under 20% per minute, it would be easier to compare them to each other. The trade should furthermore gain by the long run. Another problem is the adaptation of meshwidth to the cross materials d50-limit. The relation between them is of great importance to achieve full interlock. It is also important to adjust the strain in the armament so that the force in it can be mobilised before the movement in the soil has been so great that the soil already has collapsed. (A)

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/14021617
• Corporate Authors:

  KUNGLIGA TEKNISKA HOEGSKOLAN, AVD. FOER JORD- OCH BERGMEKANIK

  STOCKHOLM,   Sweden  S-100 44
• Authors:
  • ERIKSSON, P
  • JERNBERG, M
• Publication Date: 1994

Language

• Swedish

Media Info

• Features: References;
• Pagination: 54 p.
• Serial:
  • EXAMENSARBETE
  • Issue Number: 6
  • Publisher: LULEAA TEKNISKA UNIVERSITET, INST FOER SAMHAELLSBYGGNADSTEKNIK, AVD FOER TRAFIKTEKNIK
  • ISSN: 1402-1617

Subject/Index Terms

• TRT Terms: Calculation; Compaction; Earth pressure; Geotextiles; Lattices; Loads; Material reinforcement; Measurement; Pavements; Size; Soils; Strength of materials; Structural strengthening; Test procedures
• Uncontrolled Terms: Active earth pressure
• Geographic Terms: Sweden
• ITRD Terms: 6464: Calculation; 3686: Compaction; 9014: Dimension; 5726: Earth pressure (active); 4568: Geotextile; 3463: Lattice; 5567: Load; 6136: Measurement; 9111: Reinforcement (gen); 4156: Soil; 3096: Strengthening (pavement); 8109: Sweden; 6288: Test method
• Subject Areas: Geotechnology; Highways; Pavements;

Filing Info

• Accession Number: 00682195
• Record Type: Publication
• Source Agency: Swedish National Road and Transport Research Institute (VTI)
• Files: ITRD
• Created Date: Aug 17 1995 12:00AM