The inner lining system in Norwegian traffic tunnels

摘要

A number of different Water and Frost protection Systems, or so-called inner linings, have during the years been introduced and tested in Norwegian road tunnels. At present a limited number of such systems have been approved by the Norwegian Public Roads Administration (NPRA). these systems will all be described in brief. A system based on pre-cast concrete segments will Be described in details, including the installation procedure. Experience and limitations associated with this system will also be Discussed.