Geotechnical and structural monitoring - Capodimonte Tunnel, Naples Ring Road, Italie
In the heart of Naples, SOCOTEC Italia supports AMPLIA Infrastructures in the geotechnical and structural monitoring activities related to the construction of the new bypasses of the Capodimonte Tunnel, along the Naples Ring Road. A project of high technical complexity, where the safety of the works and the protection of the existing infrastructure are the top priority, guaranteed by a continuous control system and advanced monitoring technologies.
Key information
- Project Name: Geotechnical and structural monitoring - Capodimonte Tunnel, Naples Ring Road
- Date: 2025
- Client: AMPLIA Infrastructures S.p.A. and Tangenziale di Napoli S.p.A.
- Location: Naples
Project details
As part of the programme of structural improvement and plant upgrading of the axis tunnels of the Naples Ring Road (A56 Motorway), AMPLIA Infrastructures has entrusted SOCOTEC Italia with the geotechnical and structural monitoring activities related to the construction of two bypasses connecting the arches of the Capodimonte Tunnel.
The main objective of the project is to guarantee the safety of the existing works and infrastructures during all excavation phases, through continuous monitoring of geotechnical and structural parameters. The monitoring system allows the early detection of any movements or deformations of the ground and structures, enabling preventive and targeted intervention to protect both workers and the work as a whole.
The activity is part of the extraordinary maintenance and infrastructure resilience measures promoted by Tangenziale di Napoli, aimed at improving the safety and durability of urban tunnels.
Job details
SOCOTEC Italia built an integrated instrumentation and geotechnical monitoring system, including sensors installed both inside the new excavated bypasses, and on the existing boreholes and external contour areas.
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Main activities :
Surface monitoring
- Installation of 8 wall inclinometers in the forest and along the boundary wall of the stables and archbishop's building.
- Installation of 3 multi-base strain gauges in borehole at depths of 5, 13 and 24 metres at the bypass excavation.
- Management of the digital monitoring platform with emission of graphs and continuous control reports.
Tunnel Monitoring
- 2 load cells at the base of the ribs and 5 pressure cells placed on the footings, kidneys and key of the section.
- 4 strain gauge bars for each of the three bypass sections, applied on the slab, piers and key.
- 8 sections of vibrating rope strain gauge bars on the existing arches (piers, kidneys and key), before and after the excavation face, on both barrels.
The readings were taken with high-precision topographic instrumentation, allowing three-dimensional measurement of displacements and convergences during and post-operam.
The automatic acquisition system, connected to the SOCOTEC platform, ensures real-time control and complete traceability of the data, contributing to proactive safety management during construction.
In a complex urban context such as the Capodimonte Tunnel, safety is a top priority. Thanks to continuous monitoring, it is possible to prevent critical situations and ensure the stability of structures during each phase of excavation. This approach reflects SOCOTEC's mission: to provide tools and expertise to make infrastructure and the people working in it safer.
