STRUCTURAL INVESTIGATIONS FOR RESTORING THE EAV TUNNEL SECTION OF CIRCUMFLEGREA

Carrying out investigations on the existing structures, preparatory to the drafting of the executive project of the "Static rehabilitation of the old Camaldoli tunnel" works for the restoration of the functionality of the double track line of the EAV railway of the Circumflegrea along the Traiano-Pianura section, currently strongly conditioned by the availability of only the recently built tunnel, due to the numerous collapses and instabilities that affected the original underground route ("vecchia camaldoli") dating back to the post-war period in the 2000s.

The investigations concerned both masonry and reinforced concrete structures; in the first case, 10 flat jacks were carried out, with the double technique and 10 endoscopic investigations, while in the vicinity of a portion of reinforced concrete. 2 cores and 3 steel bars were taken, as well as 3 pachometric tests and 3 combined Sonreb tests were carried out.