Cross fertilization in Geoscience: the contribution of ICT to enhance resilience by web-assisted geohazard monitoring for road infrastructures.

Non-structural mitigation measures, such as monitoring systems, are broadly used for risk reduction as their impact on the environment and on the vulnerable elements is quite low. However the need for a proper framework to organize, analyse and share data increases when the amount of information gathered from the monitoring network scales. To this aim ICT (Information and Communication Technology) becomes crucial to handle data, automatically identify failures of the system and to enable advance data analysis by a clear and user friendly representation of the monitoring data. In this framework, we implemented an integrated system in a road tunnel located in Passo della Morte (UD) that serves a National Road. A section of 300 m of the tunnel intersect a 24 million m3 rock slide and the slow but unremitting movements of the landslide induce tension cracks inside the tunnel near the sliding surface. To mitigate the hazard of sudden collapse of small portions of the crown of the structure and to monitor the whole phenomenon a system consisting of 8 clinometers and 24 crackmeters has been deployed. Every element of the monitoring system is now accessible through a user friendly web-based platform which allows researchers and the infrastructure manager to analyse data in real time. Moreover, the data is gathered and aggregated automatically by the system, that provides also alert if communication is lost. An optical fiber sensing system is going to be deployed in the following months: it will provide measures measurements of cumulative strain in large areas of the tunnel ceiling. Redundancy, scalability and integration of different types of sensors in the monitoring system, along with proper data handling, are the keys for an improved overall robustness of complex monitoring system. Ultimately, in the Passo della Morte road tunnel context or, in general, when fundamental infrastructures need to cross hazardous areas, resilience may come from real-time constant monitoring, and the associated in-depth knowledge of the phenomenon that such a monitoring definitely provides.