The management and maintenance of the tunnels currently in service require the application of techniques for the inspection of linings and facilities, using high performance systems. Besides, many of the contracts of maintenance of the infrastructures, including those of tunnels, are managed through contracts of service quality indicators. In order to assess the different indicators of the state of the tunnels, it is necessary to have objective inspection tools (not only visual inspection performed by surveyors) to measure the evolution of deterioration. The paper presents different automated techniques, some of them already fully implemented in the infrastructure maintenance market, such as the Lidar, and some of them which are brand new and make it possible to complete the information for the inspection of deterioration in all kinds of lining. We will see how the results obtained in different tunnels through to visual inspections performed by specialist surveyors can be completed with the information obtained through state-of-the-art techniques mainly based on imaging and laser. The automated inspection offers a better knowledge of the state of the tunnel and avoids subjectivity problems associated to traditional inspection. This paper will show how these techniques may function as a basis for accepting new tunnels and uploading all the digital information to the database for its later exploitation with BIM-type systems (Building Information Modeling systems).
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