DESIGN OF UNPAVED ROADS AND TRAFFICKED AREAS WITH GEOGRIDS. POLYMER GRID REINFORCEMENT: PROCEEDINGS OF A CONFERENCE SPONSORED BY THE SCIENCE AND ENGINEERING RESEARCH COUNCIL AND NETLON LTD AND HELD IN LONDON 22-23 MARCH 1984

An increasing number of unpaved roads and trafficked areas, such as parking lots and drilling pads, are built using geogrids. These unpaved structures are composed of a base layer placed on a subgrade soil and reinforced with one or several layers of geogrids. At the present time, no design method for these structures is available. This paper presents the initial development of a design method for geogrid-reinforced unpaved structures. The paper reviews the mechanisms through which geogrids can improve the performance of an unpaved structure. An analysis of published full-scale unpaved road data is presented. The analytical development of the design method is described, as is the preparation of design charts. The charts give base layer thickness as a function of the subgrade soil undrained shear strength, geogrid tensile stiffness, traffic, and allowable rut depth of the unpaved structure. The use of the charts is illustrated by a design example. It is pointed out that the design method is still undergoing development and that field and/or laboratory verification of the method is required. When fully developed, the method will allow designers to evaluate the cost effectiveness of geogrids as compared with other methods for constructing unpaved roads and trafficked areas. For the covering abstract of the symposium see IRRD 284425. (TRRL)

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/isbn/0727702270
• Corporate Authors:

  Thomas Telford Limited

  London,   United Kingdom 
• Authors:
  • Giroud, J P
  • Ah-Line, C
  • Bonaparte, R
• Publication Date: 1985

Media Info

• Features: Figures; References;
• Pagination: p. 116-127
• Serial:
  • Publication of: Telford (Thomas) Limited
  • Publisher: Thomas Telford Limited
  • ISSN: 0002-2853

Subject/Index Terms

• TRT Terms: Base course (Pavements); Cost effectiveness; Design methods; Geogrids; Geotextiles; Pavement layers; Rutting; Stiffness; Subgrade (Pavements); Thickness; Traffic loads; Undrained shear strength; Unpaved roads
• Uncontrolled Terms: Rut depth
• Subject Areas: Design; Freight Transportation; Geotechnology; Highways; Materials;

Filing Info

• Accession Number: 00462492
• Record Type: Publication
• Source Agency: Transport Research Laboratory
• ISBN: 0-7277-0227-0
• Files: ITRD, TRIS
• Created Date: Feb 28 1987 12:00AM