Geogrids in unpaved road design: a parametric study

In Malaysia, the usage of geogrids in road pavement design on soft subgrade soils has gained acceptance in the recent years. This paper investigates some of the factors affecting the performance of geogrids in unpaved road design by conducting a series of numerical parametric study based on the theory outlined by Giroud and Noiray (1981). The factors examined in this study were the shear strength of subgrade soils (in terms of CBR value), number of traffic passes and secant modulus of geogrids. This study found that the thickness of aggregate layer can be reduced to more than 25 per cent when a geogrid is used for unpaved road with soft subgrade soils. In addition, the benefit of geogrids is shown to be more significant when the subgrade CBR value is equal to or lower than 1.0 per cent, especially when the secant modulus of the geogrid used as the reinforcement is high.

• Authors:
  • Hwa, O T
• Conference:
  • Malaysian Road Conference, 6th, 2004, Kuala Lumpur, Malaysia
• Publication Date: 2004

Language

• English

Media Info

• Pagination: 8p
• Serial:
  • Issue Number: 14

Subject/Index Terms

• TRT Terms: Geogrids; Gravel roads; Highway design; Pavement performance; Rolling contact; Shear strength; Soils; Subgrade (Pavements); Thickness; Unpaved roads
• ATRI Terms: Geogrid; Pavement performance; Road design; Shear strength; Soil; Subgrade; Thickness; Unsealed road; Vehicle pavement interaction
• Subject Areas: Geotechnology; Highways;

Filing Info

• Accession Number: 01391138
• Record Type: Publication
• Source Agency: ARRB
• Files: ATRI
• Created Date: Aug 23 2012 5:19AM