Benjamin Gorget, civil engineer and project manager at the RATP Department for the Management of Infrastructures, explains that the RATP gives great importance to the integration of advanced technologies in their mission of providing a more secure, reliable and efficient transport service. The use of satellite technology has proven key for a comprehensive monitoring of the Parisian network as it enables to better anticipate any impact caused by ground motion.
The RATP implements a surveillance programme based on traditional methods which are very precise but less flexible, explains Benjamin Gorget. As these campaigns are on-site they need to be conducted during the night with no train circulation. Satellite monitoring represents the ideal complement of these methods.
A new study has recently been delivered to the RATP focusing on the monitoring of the aerial network covering a total area of 77km. Special attention has been paid to bridges and viaducts which are considered sensitive structures as their construction dates back to the 1960s. These updates keep the RATP constantly informed about any slightest movement detected likely to cause disorders on these structures.
The study was made with data from the TerraSAR-X satellite and the results delivered by TRE ALTAMIRA included 1,2 million of measurement points that confirmed that the area studied is generally stable.
Ground motion map of a section of the aerial network for the period studied (2011-2016).