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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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Water-based ceiling coating improves tunnel visibility, safety and aesthetics in the Changwon Tunnel. In this case it was important for the tunnel operator to choose tunnel finish materials that had the right reflectivity, adaptability, cleanability, durability and safety effects for the road user.
The RockDrain water-proofing concept is a special designed system for waterproofing, fireproofing, insulating and frost proofing of underground facilities and tunnels.
How will the implementation of autonomous and cooperative car technology effect management, operation and safety in tunnels. And what issues have to be considered when it comes to tunnels? The purpose of starting a work with Intelligent Traffic Systems (ITS) station concept has been to establish a method of communicating between tunnel and vehicle using a standard platform.
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.
When a given event is to be handled, the operator must seek information in a variety of sources and decide what information is relevant. Its important to treat this information in a smart and secure way to ensure the right actions.
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.
Road authority are seeking smarter tunnels to meet new requirements from the autonomous and cooperative car technologies. Its important to consider opportunities and consequences for design, technical systems and operations in tunnels. Digital technologies have developed rapidly over the past years and they are increasingly being introduced in transport. While Intelligent Transport Systems (ITS) focus on digital technologies providing intelligence placed at the roadside or in vehicles, C-ITS (Cooperative Intelligent Transportation Systems) focuses on the communication between those systems – whether it is a vehicle communicating with another vehicle, with the infrastructure, or with other C-ITS systems.
New research from Belgium conclude that mobile fans can be used for controlling smoke in tunnels. However there are limitations on how effective mobile fans is, but also the conditions that which is the basis for research. However mobile fans are so much more than a single fan, it can provide additional water, have adjustment options in height and be used to move vehicles and debris.
Cavidrain® is a preformed geocomposite drainage system designed to relieve water penetration and reduce hydrostatic pressure within tunnel constructions. A satisfactory tunnel design anticipates drainage needs by managing the build up of hydrostatic pressure on the waterproofing layer and by transporting water away in the tunnel invert.
Norway is first to close down the FM broadcast in favour of Digital Audio Broadcast (DAB) technology. A bold decision that have raised a lot of questions about installation, reception conditions and safety issues for the road users. About 40% of the radio listening is from a car in Norway. DAB will therefore not be a full range of radio offer without reception conditions in the tunnels.
Last week, in the well-known Applus+ "San Pedro de Anes" Experimental Centre, we where presented the latest design within ventilators and explained how a proper design can optimise the airflow. Not only will a optimised design save costs, but also increase safety, says Dr. Fathi Tarada.
