DESIGN ASPECTS OF ROAD DRAINAGE

ONTWERPASPECTEN VAN WEGDRAINAGE

RESEARCH HAS BEEN CARRIED OUT BASED UPON EXISTING KNOWLEDGE OF TILE DRAINAGE OF ROADS. IT IS MENTIONED THAT HIGH GROUND WATER LEVELS IN ROADS OCCUR MAINLY IN THE CLAY AND SILT SOIL PROFILES IN THE WESTERN PARTS OF THE NETHERLANDS AND OCCASIONALLY, UNDER SPECIFIC CONDITIONS, IN THE SANDY LOAM DEPOSITS IN THE EASTERN PARTS OF THE COUNTRY. BY MEANS OF A SPRINKLER INSTALLATION THE RELATION WAS ESTABLISHED BETWEEN THE AMOUNT OF PRECIPITATION ON THE ROAD AND THE GROUND WATER LEVEL IN THE SANDBED. IT APPEARED THAT EVEN BY LITTLE PRECIPITATION A RAPID RISE OF THE GROUND WATER-LEVEL OCCURRED PROBABLY DUE TO SMALL STORAGE CAPACITY AS A RESULT OF TRAFFIC COMPACTION. FROM INVESTIGATIONS INTO THE RELATION BETWEEN WATER CONTENT AND WATER SUCTION (PF-CURVE) ON ONE HAND AND WATER CONTENT AND STABILITY OF THE SANDS (C.R.B.- VALUE) ON THE OTHER HAND IT FOLLOWED THAT FOR SANDBEDS OF VERY HEAVILY LOADED ROADS IN THE NETHERLANDS A DEWATERING DEPTH OF 0,80 M WITH RESPECT TO THE TOP OF THE SAND SUBBASE IS REQUIRED. FOR DETERMINING THE NECESSITY OF A DRAINAGE SYSTEM IN ROADS, GENERALLY IN THE FORM OF A SANDBED TILE- DRAINAGE, A CALCULATION METHOD WAS DEVELOPED. HOWEVER, THIS CALCULATION-METHOD CAN ONLY BE APPLIED TO A ROAD PROFILE WITH SIDE DITCHES. TO ILLUSTRATE MORE COMPLICATED SITUATIONS SUCH AS VIADUCT DRAINAGE SYSTEMS, DRAINAGE OF ROADS IN URBAN AREAS, AND THE CASE OF UPWARD SEEPAGE, FOUR EXAMPLES OF DRAINAGE SYSTEM ARE INCLUDED.

  • Corporate Authors:

    SCW Werkgroep ei 'Drainage van Het Weglichaam'

    Arnhem,   Netherlands 
  • Publication Date: 1974-6

Language

  • Dutch

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 00083842
  • Record Type: Publication
  • Source Agency: Transport and Road Research Laboratory (TRRL)
  • Report/Paper Numbers: No. 36 R&D Rpt.
  • Files: ITRD, TRIS
  • Created Date: May 1 1975 12:00AM