This works concerns SS1 Nuova Aurelia design and construction, acess roads to Savona Port Hub, connection between A10 tollbooth Savona and Albisola and Savona and Vado harbours. Road starts in Savona with a junction in Corso Ricci , near the Letimbro torrent to the north of motorway (Svincolo Letimbro), and ends in Albisola Superiore (Svincolo Sansobbia), at the intersection with Via Saettone. More than 75% of the road lays underground, with realization of 4 natural tunnels: Capuccini (1125 m), San Paolo (2051m), Basci (530m) excavation with TBM diameter 13.60m and Grana (188m) excavation realized by traditional method.
SGAI S.r.l. did Detailed design of major and minor works, design hydraulics road platform, hydraulic studies to dispose rainwater and dripping water, study road paving concrete solution, fire protection and ventilation system, geotechnical and geological planning. For all tunnels SGAI S.r.l. made analysis of soil behavior during underground excavation, identification of consolidation interventions, pre-coating, definitive coating, definition of monitoring program for excavation control. SGAI S.r.l. also did design and study of entrances realized by prefabricated ashlars laided on piers cast in situ. SGAI S.r.l. did geothecnical study and risk valutation about TBM passage inside a residential area with low covering and its effects on buildings and works (for example under crossing of hightway tunnels). For this reason is made a registration of all buildings that can be interesting and bi dimensional and 3D FEM.