Variant to SS 1 “Via Aurelia” (Aurelia bis) – Access road network to the Port Hub of La Spezia – Interconnection between the A12 tollgates and the Port of La Spezia – 3rd lot between Felettino and the motorway link. Executive Design for partial section and completion C – 3rd functional segment.

Project objective

The intervention aims to complete Section C of the 3rd lot of the Aurelia bis between the San Venerio interchange (north abutment of the “San Venerio II” viaduct) and the Melara interchange connecting to the motorway link, bringing the section into operation and integrating it with the other sections under construction, in continuity with the urban road network and the motorway system. This is a completion intervention: the approved alignment and horizontal/vertical design data remain unchanged, while the completions and local upgrades required for safety, regulatory compliance and commissioning are implemented.

Main works

VI11 San Venerio II viaduct: completion of the deck edge beam (reinforcement/casting/finishes), safety and noise barriers, joints and edge sealings, additional waterproofing/drainage at deck edges, pavement and signage on tie-ins.

GA02 Felettino II artificial tunnel: main structural works already executed (Ø1200 diaphragm walls, cover on prestressed beams with slab; backfilling nearly completed); completion of internal excavation, reinforced-concrete invert slab, backfilling/kerbs and redirecting profiles, water management; residual waterproofing at the north portal and gravel traps at portals.

GN03 Felettino III natural tunnel: completion of tunnel excavation previously interrupted due to the evolution of an instability condition and restoration of the tunnel profile in sections with deformed primary lining; completion of crown/sidewalls and remaining waterproofing; drainage works; niches/lay-bys and portals (north and south) with extension of the artificial tunnel at the south portal for slope stabilisation.

GN04 Fornaci I natural tunnel: completion of excavation with two critical interferences—the Vorticosa railway tunnel and the railway embankment with limited cover; completion of crown/sidewalls and remaining waterproofing, and construction of an artificial tunnel with a monolithic thrust-resistant structure at the south portal (underpass of Via Sarzana) connecting to GA Fornaci II.

GA03 Fornaci II artificial tunnel: completion of diaphragm walls / jet-grouting bottom plug; then cover slab, internal excavation and invert slab, backfilling and finishing works.

GN05 Fornaci III natural tunnel: upon completion of GA Fornaci II, completion of the last excavation round of the natural tunnel with related lining/waterproofing, and completion of the artificial tunnel at the south portal with the associated backfilling/linings.

GN06 Fornaci IV natural tunnel: upon completion of GA Fornaci II, completion of the last excavation round of the natural tunnel with related lining/waterproofing, and backfilling/linings of the already-built artificial tunnel at the south portal.

Melara interchange (motorway link interconnection): completion of ramps N, P, S, W. On Ramp N (VI12) completion of piers 8–10–11 and construction of the deck; on Ramps P (VI13), S (VI14) and W (VI15) substructures are already built (on S the elevation of abutment A is missing) and in all three cases the entire deck is still to be constructed with beam placing, slab and joints.
Rearrangement of local road network (Via Melara Nuova, Via Sarzana roundabout) for accessibility and urban integration.

Minor structures and tunnel systems: completion of walls/diaphragms, hydraulic protections and electrical substation; installation of tunnel systems.