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Leveraging Multi-Temporal InSAR Technique for Long-Term Structural Behaviour Monitoring of High-Speed Railway Bridges

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Pubblicato in:Remote Sensing vol. 16, no. 17 (2024), p. 3153
Autore principale: Winter, Kim
Altri autori: Lee, Changgil, Byung-Kyu, Kim, Kim, Kihyun, Lee, Ilwha
Pubblicazione:
MDPI AG
Soggetti:
China
Accuracy
Arch bridges
Radar
Railway bridges
Deformation
Concrete
Railway engineering
Satellite imagery
High speed rail
Remote monitoring
Deformation effects
Deformation analysis
Post-tensioning
Superhigh frequencies
Data points
Interferometric synthetic aperture radar
Construction
Spacecraft recovery
Prestressed concrete
Infrastructure
Image enhancement
Pattern analysis
Urban areas
Satellites
Bridges
Parameters
Structural behavior
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Abstract:The effective monitoring of railway facilities is crucial for safety and operational efficiency. This study proposes an enhanced remote monitoring technique for railway facilities, specifically bridges, using satellite radar InSAR (Interferometric Synthetic Aperture Radar) technology. Previous studies faced limitations such as insufficient data points and challenges with topographical and structural variations. Our approach addresses these issues by analysing displacements from 30 images captured by the X-band SAR satellite, TerraSAR-X, over two years. We tested each InSAR parameter to develop an optimal set of parameters, applying the technique to a post-tensioned PSC (pre-stressed concrete) box bridge. Our findings revealed a recurring arch-shaped elevation along the bridge, attributed to temporal changes and long-term deformation. Further analysis showed a strong correlation between this deformation pattern and average surrounding temperature. This indicates that our technique can effectively identify micro-displacements due to temperature changes and structural deformation. Thus, the technique provides a theoretical foundation for improved SAR monitoring of large-scale social overhead capital (SOC) facilities, ensuring efficient maintenance and management.
ISSN:2072-4292
DOI:10.3390/rs16173153
Fonte:Advanced Technologies & Aerospace Database