Laboratory devices

Localised sinkhole simulation

A new laboratory device has been developed to simulate a cavity by both processes (trapdoor and progressive cavity diameter opening process) for various ratio between the height of the platform and the diameter of the cavity. Tests performed on different soils and geosynthetics allow to define the shape of the soil area affected by the sinkhole (cylindrical or tronconical), to determine the value of the expansion coefficient and to analyse the shape of the load distribution at the reinforced platform base. It permits to create a database on which numerical calculations will be validated.