Tunnel inspection investigation innovation in Japan

A new approach to tunnel inspection technology in Japan could yield major benefits in determining quality and safety. A team comprising specialists from Japan’s Institute for Laser Technology and the Japan Atomic Energy Agency is having evaluating the use of lasers for upgrading tunnel inspection methods as part of a two year research programme. The new technique is said to allow inspectors to examine tunnel wall conditions at a higher frequency of 25 times/second. The technology also allows tunnel wall
January 14, 2016 Read time: 2 mins
A new approach to tunnel inspection technology in Japan could yield major benefits in determining quality and safety. A team comprising specialists from Japan’s Institute for 3098 Laser Technology and the Japan Atomic Energy Agency is having evaluating the use of lasers for upgrading tunnel inspection methods as part of a two year research programme.

The new technique is said to allow inspectors to examine tunnel wall conditions at a higher frequency of 25 times/second. The technology also allows tunnel wall conditions to be inspected to a depth of 10cm under the surface. The new method uses a combination of laser technology and ultrasonic flaw detectors to evaluate conditions to greater depths than would previously have been possible.

Key features of the system include the use of a special lens as well as water-cooling in the laser to reduce heat generated by the equipment and boost performance.
Road Structures

For more information on companies in this article

Related Content

  • Novel twin layer paving technology saves time
    February 28, 2012
    German paver specialist Vögele reports that market acceptance is growing for its novel twin layer paving technology
    Read More
  • Importance of road/tunnel drainage systems
    April 10, 2012
    A variety of systems are available for quickly and efficiently removing water from roads as Patrick Smith reports The presence of water in a highway layer reduces the bearing capacity of the road, and in doing so it also reduces the structure's lifetime. Indeed, the recent extremely cold winter in many parts of Europe has shown that in colder climates there is a risk of frost damage when water is present resulting in costly potholes, so drainage systems performing properly are important in road design.
    Read More
  • Importance of road/tunnel drainage systems
    May 8, 2012
    A variety of systems are available for quickly and efficiently removing water from roads as Patrick Smith reports. The presence of water in a highway layer reduces the bearing capacity of the road, and in doing so it also reduces the structure's lifetime. Indeed, the recent extremely cold winter in many parts of Europe has shown that in colder climates there is a risk of frost damage when water is present resulting in costly potholes, so drainage systems performing properly are important in road design.
    Read More
  • Cost-saving compact twin layer asphalt paving
    February 28, 2012
    Twin-layer paving offers high quality, long lasting road surfaces to be constructed. Paver manufacturer Dynapac is one of the pioneers of the twin-layer paving technique, which it calls Compactasphalt. According to Dynapac this method offers major benefits to contractors and clients alike as roads surfaced using this technique last longer and are cheaper to maintain. To ensure contractors have maximum utilisation of their machines, Dynapac offers a modular paver system that can be operated using the convent
    Read More

Highlighted Content