Liquefaction risk assessment of embankment dikes in lower Rhône valley
The general objective and scope of this project is to assess the liquefaction risk potential in hydraulic embankment structures (dams and dikes) in lower Rhone valley by a multidisciplinary approach. The project will focus on the case of the Camargue dikes.
The specific objectives of this project are:
- Involvement and collaboration between various disciplines: history, seismotectonics, civil engineering, soil mechanics, economics;
- A better understanding of the evolution over time of the Camargue dikes, their held during the seasonal floods and causes of failures of these dikes during the great floods of the Rhône (historical approach);
- Characterization of the seismic hazard of the Camargue by a seismotectonic model built on the basis of a synthesis of the state of knowledge of the seismicity and tectonics of the Camargue (seismotectonic approach);
- Geotechnical database (in-situ and laboratory) for the dikes of the Camargue in order to analyze in depth the phenomenon of liquefaction;
- A better understanding of the phenomenon of liquefaction and liquefaction potential characterization of materials of dikes in Camargue from experimental results in the laboratory (soil mechanics approach) and from numerical modeling of dike sections analyzed (civil engineering approach);
- An assessment of the economic impact of a dike failure in Camargue (economic approach).