GNGTS 2021 - Atti del 39° Convegno Nazionale

GNGTS 2021 S essione 3.2 440 interface soil structure. For this purpose, Cross hole Electrical Resistivity Tomography (CHRT) and GPR were used to characterize and monitor the foundation structures and the disposition of the rebar for the reinforced concrete frame. In the second part of this work, geoelectric and electromagnetic methodologies were used for the engineering characterization applied on an old railway tunnel located in Marsico Nuovo, Basilicata, Italy (Fig.2). The tunnel is part of the Athena-Foggia railway line which was never completed (the last stop is Marsico Nuovo) and was closed in the 1960s. The geophysical investigations were carried out from the outside of the tunnel from the topographic surface of the slope of the mountain and from inside the tunnel. The geophysical investigations conducted, without altering the structure and in a fast manner, obtains important information concerning the construction of the tunnel, and the interaction between the infrastructure and surrounding rock, in that area that we define infrastructural critical zone. The study conducted aims to highlight the potential and any limitations of the use of geophysical techniques applied on the tunnel without having any information of the infrastructure project and emphasizing the emerging role of urban geophysics for the importance and topicality of its contents as well as the important innovations that the use of these techniques they can contribute to the hazardous processes. References Lapenna, V. 2017: Resilient and sustainable cities of tomorrow: the role of applied geophysics. Bollettino di Geofisica Teorica ed Applicata , 58 (4), 237-251. Corresponding author: giacomo.fornasari@unife.it Fig. 2 - Old railway tunnel located in Marsico Nuovo (Basilicata region, Italy)