GEOGRID REINFORCED ROADWAY STRUCTURE, NORTH EAST BRITISH COLUMBIA, CANADA

This case history of a geotextile reinforced roadway structure in north east BC, Canada, describes its design concept, geotextile installation procedure, field performance to date, and plans for future evaluation. The design procedures generally followed those outlined in the Tensar Corporation's technical notes. To resolve a dilemma about geogrid placement, the following two different test designs were selected: (1) Test Design A, with 225mm of crushed base overlying 225mm of sub-base, with geogrid between them; and (2) Test Design B, with the geogrid shifted 75mm up into the crushed base layer. Three separate sections of geogrid reinforced base were used in the reconstruction of 1.8km of Road 702. There was one 230m long section of Test Design A and two sections, of lengths 200m and 300m, of Test Design B. The technique of placing base aggregate over the geogrid was refined as the project developed. A performance evaluation programme, using the Benkelman beam method, showed that the geogrid reinforced sections performed at least as well as the thicker standard roadway design. For the covering abstract see IRRD 865821.

  • Availability:
  • Corporate Authors:

    BiTech Publishers, Limited

    173-11860 Hammersmith Way
    Richmond, British Columbia V7A 5G1,   Canada 
  • Authors:
    • POLYSOU, N C
    • LACHMUTH, G A
  • Publication Date: 1993

Language

  • English

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 00668210
  • Record Type: Publication
  • Source Agency: Transport Research Laboratory
  • ISBN: 0-9696924-0-4
  • Files: ITRD
  • Created Date: Nov 2 1994 12:00AM