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January 28, 2020

 Road tunnels and technology in an operational perspective
Arild Petter Sovik, Tunntech Global News

Several innovative businesses are working with new better materials to provide tunnel owners with construction elements that uses materials well suited for other more demanding industries. But are we ready to challenge the traditional materials?

11 - 14 June 2018, Trondheim, Norway.                          

the 8th International Symposium on the modern use of wet-mix sprayed concrete for underground support. One of the goals of the symposium is to share knowledge about sprayed concrete. 

In some cases there is a need to fire-proof narrow tunnels or tunnels with an inner structure that can not withstand high weight. This can be solved by using fire resistant concrete that is light, do not take much space and can withstand high temperatures.

The road owner seek solutions that can give a light and maintenance-friendly tunnel, that also feel safe for the motorists. White coating can contribute to make the tunnel lighter. The right amount of tunnel lighting can also be used, often in a combination with lining and coating. 

The overall aim of passive systems is to contain the fire by use of protection to prevent the fire and smoke from moving from one compartment to another, delaying the collapse of the building structure or/and delaying the growth of the fire.

Increased quality in order to extend the constructions lifetime to 100 years and thereby avoid renovations or new construction. This is one of the the arguments for using full cast vault in road tunnels.

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