Structural Monitoring and Maintenance

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Robotized inspection and health monitoring in the Gran Sasso National Laboratory

  • Rinaldi, Cecilia (Department of Civil Architectural and Environmental Engineering, University of L'Aquila) ;
  • Di Sabatino, Umberto (Department of Civil Architectural and Environmental Engineering, University of L'Aquila) ;
  • Potenza, Francesco (Department of Engineering and Geology, University G. d'Annunzio of Chieti-Pescara) ;
  • Gattulli, Vincenzo (Department of Structural and Geotechnical Engineering, Sapienza University of Rome)
  • Received : 2020.05.02
  • Accepted : 2020.11.18
  • Published : 2021.03.25
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Abstract

The Gran Sasso National Laboratory (LNGS) is the largest underground research center in the world devoted to neutrino and astroparticle physics. It is located in galleries below about 1400 meters of rock mass. In this environment, inspection and monitoring actions are challenging for the maintenance and the safety of the infrastructures and they require a combined use of different strategies. The paper address issues related to the structural safety of the whole environment by proposing solutions for inspection and monitoring of different areas and elements, such as the gallery vaults, the structures of the experimental prototypes, the plants and the machinery. A generic framework is discussed to evidence the features of each specific solution and the interaction between different systems. Tunnel structural healthy is the most difficult to evaluate because the vaults are coated by not removable panels which waterproof and insulate the environment. Therefore, specific solutions are proposed for the inspection and monitoring of the vaults which are visible only in the interspace realized from such cladding panels. In this respect, different methodologies based on the use of robotic systems are presented and discussed in order to implement a suitable inspection and monitoring program. The complementary requirements to perform a mechatronic survey are defined also as basis of ongoing activities currently performed in LNGS.

Keywords

Acknowledgement

The research leading to these results has received funding from the Italian Government under Cipe resolution no. 135 (Dec. 21, 2012), project INnovating City Planning through Information and Communication Technologies. This work is part of a project that has received funding from the Research Fund for Coal and Steel under grant agreement No 800687. The authors wish to thank Eng. Paolo Martella (Head of Design Service at LNGS) for the very useful technical information and documents on the Laboratories' infrastructures.

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