Application of Distributed Acoustic Sensing to Seismic Hazard Assessment

Project description

"The objective of the project is to evaluate the DAS (Distributed Acoustic Sensing) technology for site characterization as a complement and thanks to a close collaboration with ANR MONIDAS which does not cover this objective. Thus we have the opportunity to have the Febus Optique interrogator free of charge. Preliminary numerical tests with sensor arrays comprising only horizontal components, such as those that can be realized with fiber optics, have shown that it is possible to extract the Rayleigh and Love dispersion curves simultaneously. Each fiber crossing represents a two-component sensor. The aim of this project is to verify these conclusions by means of an experimental device recording ambient vibrations on a campus lawn with an aperture of about 80 m. Conventional measurements of ambient vibrations have already been performed during M1 TP and will be repeated at the same time as the SAR measurements. The aim is to test the impact of the coupling (aerial fiber, buried or in a duct) but also to evaluate the complexity of this type of installation. It is a project centered around methodological developments validated by local experts, made possible thanks to the collaboration between the ERM and Waves teams, and in line with the transversal risk axis."