Manufacturers' claims for the performance of pavement edge fin drains are examined and the progress on the preparation of a complete specification is reviewed. Fin drains are planar geocomposite structures with a polymer core and geotextile filter layers on the outside designed to transmit groundwater vertically or horizontally. Effective edge drains can substantially prolong the life of a pavement by keeping the sub-grade dry and fin drains offer significant savings in cost and materials when compared with conventional forms of drainage. Little information is available on what to use and where to use it and a more thorough document than the Department of Transport 'Highway Construction Details' is needed. It is claimed that a design is permitted in that document that can suffer from blocked filter medium due to penetration of fines. Many geotextile manufacturers are pressing for a tighter specification for edge pavement drains to encourage the use of fin drains. Results from experimental work received highlights the need for caution in the choice of fin drain products and materials should be continuously sampled to counter variability. (TRRL)

  • Availability:
  • Corporate Authors:

    D.R. Publications Limited

    Faversham House, 111 St James Road
    Croydon, Surrey CR9 2TH,   England 
  • Authors:
    • Webb, C
  • Publication Date: 1991-1


  • English

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 00617615
  • Record Type: Publication
  • Source Agency: Transport and Road Research Laboratory (TRRL)
  • Files: ITRD, TRIS
  • Created Date: Nov 30 1991 12:00AM