Rendiconti Online della Società Geologica Italiana - Vol. 60/2023

Geological-technical study for the design of an underground variant of S.S. 52 “Carnica” in the Passo Mauria area (Carnic Alps)

Angelo Ballaera1, Anna Breda2, Mario Floris2, Giovanni Monegato3, Giacomo Tedesco4 & Gianluca Marcato4
1Alma Mater Studiorum University of Bologna - Department of Civil, Chemical, Environmental and Materials Engineering - Viale Risorgimento 2, 40126 Bologna, Italy.
2University of Padova - Department of Geosciences, Via Gradenigo 6, 35131 Padova, Italy.
3Italian National Research Council (CNR), Research Institute for Geo-Hydrological Protection (IRPI), Corso Stati Uniti 4, 35127 Padova, Italy.
4Italian National Research Council (CNR), Research Institute for Geosciences and Earth Resources (IGG), Via Gradenigo 6, 35131 Padova, Italy.
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Volume: 60/2023
Pages: 126-132


This study aims to define a preliminary geological model of the Passo Mauria tunnel, designed as an alternative underground route to the current S.S.52 to ensure a safer connection over the top way Belluno (A27 Highway) Tolmezzo (A23 Highway), on which various tourist and economic activities revolve. The survey stage has allowed us to describe and represent the cartographic elements that describe the geology of the study area. The study has mainly focused on the investigation of the presumed entrances of the tunnel, characterized by specific geological and geomorphological conditions. The aerial photogrammetric survey supported the reconstruction of the geometry of discontinuities in the non- accessible areas. Besides, this study has allowed the definition of the possible behaviour of the rock mass subjected to the tunnel excavation and of sections with homogeneous mechanical properties. The drafting of a survey plan supplements the study to determine a geological and geotechnical model, for the subsequent investigation and design phases.


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