CLOSED ROAD DRAINS

DRAENERING UTAN OEPPNA DIKEN

The present report deals with different types of closed road drains. The purpose was to gather experience of earlier designs carried out and to report how drain pipes are being designed, laid and maintained in the nordic countries. The purpose also was to compare different kinds of materials for pipes and to discuss alternative designs of systems of closed drains. It is very rare that drain pipe malfunctioning has damaged the road. On the occasions when it has been necessary to dig up a malfunctioning drain pipe, the cause has mostly proved to be defects in the design. No country has reported precise methods for calculation of drain pipe dimensions, but instead the dimensioning is carried out by rule of thumb. All countries consider the question of design uncontroversial and the dimensions normally used today comply with requirements. The need of drain pipes in rock cuts has been questioned. Test results so far received indicate that drain pipes can be left out in rock cuts. Normally drain pipes are liad with the help of excavators and manual labour. However there should be great possibilities to develop methods and machines for laying drain pipes. The need for maintenance is uncertain. It is most common that the maintenance consists of inspection and removal of sediment from the wells. It is hard to establish the cost of drain pipe maintenance. Estimates however show that the maintenance cost of closed drains does not exceed the maintenance cost of open ditches. When considering pipe material it can be stated that those materials of current interest today - plastic, clay and concrete - all fulfil necessary requirements. The totally dominating material today is plastic. The choice of material for pipes is guided by economical and technical production factors. (TRRL)

  • Corporate Authors:

    Nordiska Vaegtekniska Foerbundet

    Statens Vaegverk
    Borlaenge,   Sweden 
  • Publication Date: 1980

Language

  • Swedish

Media Info

  • Features: Appendices; Figures; References; Tables;
  • Pagination: 60 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00324966
  • Record Type: Publication
  • Source Agency: Institute for Road Safety Research, SWOV
  • Report/Paper Numbers: NVF Rapp Nr 14:1980 Monograph
  • Files: ITRD, TRIS
  • Created Date: May 21 1981 12:00AM