Integration of InSAR and GPR techniques for monitoring transition areas in railway bridges

D'Amico, Fabrizio, Gagliardi, Valerio, Bianchini Ciampoli, Luca and Tosti, Fabio ORCID: https://orcid.org/0000-0003-0291-9937 (2020) Integration of InSAR and GPR techniques for monitoring transition areas in railway bridges. NDT & E International. ISSN 0963-8695

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Abstract

This paper reports the integration of the Ground Penetrating Radar (GPR) and the Interferometric Synthetic Aperture Radar (InSAR) techniques for the monitoring of the rail-abutment transition area in railway bridges. To this purpose, an experimental campaign was conducted on a rail truss bridge located in Puglia, Southern Italy. On one hand, GPR was used to obtain structural details of the subsurface (thickness of the ballasted layer, position of the sleepers, presence of clay/humidity spots) and to identify potential construction-related issues. Parallel to this, InSAR analyses were mainly addressed to monitor subsidence at the rail-abutment transition area. Outcomes of this investigation outlined presence of subsidence at both the areas of transition and have proven the proposed integrated approach as viable to achieve a more comprehensive assessment of the structural integrity of railway bridges.

Item Type: Article
Additional Information: The license for using the software ENVI SARscape® is granted by the ESA-approved project “MOBI: Monitoring Bridges and Infrastructure Networks” (EOhops proposal ID 52479). The COSMO-SkyMed StripMap HIMAGE images (CSK® Products) are © of the Italian Space Agency (ASI), delivered under the license to use. The authors would like also to express their sincere thanks to IDS GeoRadar (Part of Hexagon), for supplying part of the GPR systems, and Ferrovie del Gargano srl for providing facilities and availability of the survey site. Finally, the authors would like to acknowledge Mr. Spartaco Cera for the invaluable support provided in field activities.
Uncontrolled Keywords: Ground Penetrating Radar, GPR, Interferometric Synthetic Aperture Radar, InSAR, Permanent Scatterers, PS-InSAR, Data Fusion, Railway Monitoring, Transport Infrastructure Maintenance
Subjects: Construction and engineering > Civil and environmental engineering
Construction and engineering > Digital signal processing
Construction and engineering > Electrical and electronic engineering
Construction and engineering > Civil and structural engineering
Construction and engineering
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Depositing User: Fabio Tosti
Date Deposited: 14 May 2020 10:42
Last Modified: 14 May 2020 12:53
URI: http://repository.uwl.ac.uk/id/eprint/6944

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