ABSTRACT
New tunnel inspection tools using state-of-the-art technologies for high-performance image acquisition are developed to better address the operational constraints faced by tunnel managers in organizing inspections. To date, there is no regulation or technical guideline setting a framework of practices for the use of these tools. CETU, in partnership with tunnel managers and three operators developing innovative inspection tools, has conducted field tests to compare the results obtained with the one of traditional inspection as defined by the French regulation ITSEOA. The present paper focuses on the key parameters that ensure a good quality acquisition for identifying structural defects on two-dimensional images. It also aims at providing tunnel managers with a first insight of how to define their specifications and organize the intervention on site.
