Lyon urban area rail bypass - Crossing over the river Rhône
Measuring the hydraulic impact of bridges on flows during floods.
Context
Lyon urban area rail bypass – Crossing over the river Rhône (France) - Client: RFF - Scale: 1:80
In the context of the Lyon urban area rail bypass project, the owner and manager of the French railway network, Réseau Ferré de France (RFF), commissioned Artelia to perform a physical model study of the bridge carrying the new railway line across the Rhône, located at the eastern end of the Miribel Jonage island near the town of Niévroz, to the East of Lyon.
Purpose of the physical model
Qualitative and quantitative characterisation of the hydraulic impact of the planned structures on flows during floods
Optimisation of the structures and the construction requirements in order to minimise these impacts
Stages in the study
Calibration of instrumentation
Lyon rail bypassTesting in the existing configuration
Adjustment of the model
Testing in the design configuration
Testing in the optimised design configuration.
Description of the physical model
Representation of the Rhône and its flood plain
Bridges over the Rhône for the A432 motorway and the high-speed railway line, then the planned rail bypass (viaduct and relief structures)
Continuous measurement and recording of the levels by 22 ultrasound sensors
Automated adjustment of the downstream level by 4 hinged flaps.
