FROST PROTECTION OF NORWEGIAN ROAD TUNNELS

LITT OM FROSTSIKRING AV NORSKE VEGTUNNELER

In Norway there are about 10-15 km of road tunnels built annually, a large proportion of the tunnels are situated in areas with severe frost. Problems invariably arise in this context in that part of the tunnel's frost zone where the leakages do not freeze dry. Accumulation of ice along walls and in ditches often clogs up the drainage paths, causing water to spill on to the road where it freezes, making driving hazardous and creating difficulties for the maintenance crews. The three main methods of permanent frost protection are: - injection, - insulated aluminium sheets, - concrete lining waterproofed with membrane. Injection is only used where the leakages are fairly small and are considered easy to stop. A satisfactory frost protection can then be attained at low costs. The method most used, however, is the use of insulated aluminium sheets for the whole length of the frost zone after safeguarding the rock-face with bolts, possibly combined with metal bands and/or wire mesh. The cost of this solution is in the region of nkr 4000-5000 per linear metre. Where the rock is of a poor quality and accompanied by major leakages, a concrete lining, waterproofed with membrane, is the only acceptable solution being, however, rather expensive at a stipulated nkr 20000-25000 per metre.(a)

  • Corporate Authors:

    Royal Norwegian Council for Scientif & Ind Res

    Gaustadalleen 25
    Oslo 3,   Norway 
  • Authors:
    • PEDERSEN, K B
  • Publication Date: 1977-12

Language

  • Norwegian

Media Info

  • Features: Figures; Photos; References;
  • Pagination: p. 27-33
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00179624
  • Record Type: Publication
  • Source Agency: Transport and Road Research Laboratory (TRRL)
  • Files: ITRD, TRIS
  • Created Date: Aug 27 1978 12:00AM