Ground-penetrating Radar and Geotechnical Analyses to Investigate the Foundation Settlements of an Indiana House in NW Spain

Solla, Mercedes; López-Leira, José Manuel; Alonso-Díaz, Alex; Rodríguez, Juan Luis Rodríguez

doi:10.1080/15583058.2022.2138631

Cited by 1 publication

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“…In comparison with other NDT (non-destructive testing) methods, the GPR provides high-resolution images of the subsoil, and it has the advantage of covering a wide area in a relatively short period of time with a reduced effort [63]. GPR studies focused on the assessment of the structural stability of buildings mainly include the inspection of foundation floor systems, damage in pavements, backfill soil analysis and condition status, and ground subsidence and settlement phenomena [64][65][66][67][68][69][70][71][72][73].…”

Section: Gpr Data Acquisition and Processingmentioning

confidence: 99%

Using InSAR and GPR Techniques to Detect Subsidence: Application to the Coastal Area of “A Xunqueira” (NW Spain)

et al. 2023

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Climate change represents an important cause of subsidence, especially in coastal cities affected by changes in surface water level and water table. This paper presents a complementary study of Interferometric Synthetic Aperture Radar (InSAR) and Ground Penetrating Radar (GPR) for the early detection of subsidence and sinkhole phenomena. The methodology was applied to a coastal urban area in Galicia, northwest Spain (humid region), showing apparent signs of subsidence and building settlement during the last two years. Two different InSAR methods are compared for the period from June 2021 to March 2022: PSI (Persistent Scatterer Interferometry) and SBAS (Small Baseline Subsets), and the average deformation velocities obtained resulted in −3.0 mm/yr and −4.1 mm/yr, respectively. Additional GPR data were collected in January 2022 to validate the InSAR results, which detected subsidence in agreement with the persistent scatters obtained from the PSI method. This is crucial information to plan preventive maintenance.

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