G21B-1037
GB-SAR INTERFEROMETRY FOR STRUCTURE MONITORING DURING INFRASTRUCTURE PROJECTS
Tuesday, 15 December 2015
Poster Hall (Moscone South)
Alejandro Serrano Juan1, Enric Vázquez-Suñé2, Oriol Monserrat3, Michele Crosetto3, Christian Hoffman4, Alberto Ledesma4, Rotman Criollo2, Estanislao Pujades5, Violeta Velasco2 and Alejandro García2, (1)UPC - CSIC, Barcelona, Spain, (2)GHS (CSIC), Institute of Environmental Assessment & Water Research (IDAEA), Barcelona, Spain, (3)Centre Tecnològic de Telecomunicacions de Catalunya (CTTC), Division of Geomatics, Remote Sensing Department, Castelldefels, Spain, (4)Polytechnic University of Catalonia, Geotechnical Engineering and Geo-Sciences, Barcelona, Spain, (5)Université de Liège, Liege, Belgium
Abstract:
Monitoring is a necessary task for infrastructure projects. Ground-based synthetic aperture radar (GB-SAR) has been used in a large variety of displacement measurements. However, it has not yet been applied as a monitoring tool during construction projects. This paper aims to demonstrate that GB-SAR can be very helpful for understanding the mechanisms that control structure deformations and for identifying unexpected events and sensitive areas during construction projects. This could be done in a cost-effective way, which complements the traditional displacement measurements. An experiment was performed in the future railway station of La Sagrera, Barcelona (Spain) to demonstrate the utility of GB-SAR on structure monitoring during construction projects. In this experiment, GB-SAR precisely quantified wall displacements induced by dewatering. Manual data and numerical models have been used to confirm the measurements with a correlation analysis and by comparing measurements and deformation patterns, which have produced similar results. These results validate the use of the GB-SAR technique as a monitoring tool during construction projects.
