Citation

Sandegren E. Transp. Res. Rec. 1987; 1150: 43-48.

Copyright

(Copyright © 1987, Transportation Research Board, National Research Council, National Academy of Sciences USA, Publisher SAGE Publishing)

DOI

unavailable

PMID

unavailable

Abstract

Many of the tunnels and rock cuttings in the Swedish railway system are old and badly affected by frost action and frozen groundwater. This ice is a serious problem because in bad cases it may intrude on the track structure from the walls, and in periods of thaw it may loosen and fall on the track. It is therefore necessary to remove the ice. This work is both expensive and dangerous, and high costs and risks might be avoided if the seepage of water could be reduced or the water prevented from freezing. Deep drainage, widening the tunnel section, caulking with sprayed concrete, grouting, and insulation used to be used for this purpose. Since 1979 an entirely new method of insulating with cellular plastic has been used. Details of this method are discussed: choice of material, joining, installation and dimensioning, and cost. An account is given of the work that has been completed and of the results that have been achieved.

CONCLUSIONS that may be drawn from experience to date are presented.

Record URL:
http://onlinepubs.trb.org/Onlinepubs/trr/1987/1150/1150-007.pdf

Language: en

Keywords

Heat Insulating Materials - Plastics; Railroad Plant and Structures - Ice Problems; Tunnels and Tunneling