DESIGN OF TUNNEL STRUCTURES AND LININGS FOR ICE PRESSURE

The normal procedure for design of tunnels in soil or rock is to drain out water that flow into the tunnel. In geotechnically sensitive areas where lowering of the ground water table will result in settlement of the soil, it is not allowed to drain out the water. An interesting question is then, if there is a risk for the formation of ice between the tunnel lining and the rock or soil. A computer program has been developed for the non-linear calculation of temperature variation in tunnel linings on soil and rock. Special emphasis was laid on the proper modelling of the non-linear ice forming energy loss and gain during the freeze and thaw process. It is believed that this problem has been solved by the program and the results are in close agreement with measurements and other applied tests. The calculation shows that the temperatures behind the linings could become below -2 degrees C during cold winters. The frost depth and the amount of water that could freeze is normally though not enough to form pressures greater than the load carrying capacity of the actual tunnel linings. (A) For the covering abstract see IRRD E101472.

Language

  • English

Media Info

  • Features: References;
  • Pagination: p. 193-202

Subject/Index Terms

Filing Info

  • Accession Number: 00766989
  • Record Type: Publication
  • Source Agency: Transport Research Laboratory
  • ISBN: 3-85748-096-3
  • Files: ITRD
  • Created Date: Aug 2 1999 12:00AM