A multi-sensor approach for monitoring a road bridge in the Valencia harbor (SE Spain) by SAR Interferometry (InSAR)

Matteo Del Soldato (a,b,c), Roberto Tomás (c), Javier Pont (c), Gerrardo Herrera (d), Juan Carlos García Lopez-Davalillos (d) & Oscar Mora (e)
(a) Department of Earth Sciences, Environment and Resources, Federico II University of Napoli, Largo San Marcellino. E-mail: matteo.delsoldato@unina.it (b) Department of Earth Sciences, University of Firenze, Via La Pira 4, 50121 Florence, Italy (c) Departamento de Ingeniería Civil, University of Alicante P.O. Box 99, E-03080 Alicante, Spain (d) Área de Investigación en Peligrosidad y Riesgos Geológicos, Departamento de Investigación y Prospectiva Geocientífica, Instituto Geológico y Minero de España (IGME), Ministerio de Ciencia y Tecnología, c/ Alenza 1, E-28003 Madrid, Spain (e) Altamira Information, c/ Còrsega 381–387, 08037 Barcelona, Spain

Settlement and angular distortion affecting the construction can cause damages on structures and they could compromise the serviceability of the structure. This work focuses on the monitoring of a bridge located on the south part of the Valencia harbor that shows some opening joints and depressions in the pavement of both transition areas between the abutments and the embankments. For this purpose Advanced Differential Interferometry is used to exploit Synthetic Aperture Radar images (SAR) acquired by ALOS and Cosmo-SkyMed satellite sensors from February 2007 to July 2010 and from May 2010 to August 2012, respectively. This approach permitted to estimate surficial displacements, to identify areas of bridge affected by settlements and angular distortion and to relate them with the observed damages.

angular distortion, bridge, harbor, PSInSAR, settlement