Mechanical behavior of Ypresian plastic clays
Mechanical behavior of Ypresian plastic clays
Ypresian plastic clays are formations with a complex behavior, particularly due to their anisotropy and their swelling properties, which can make it difficult to interpret the results observed during laboratory or in situ tests campaigns. It is therefore sometimes necessary to use different methods to better understand their mechanical behavior. This communication presents the results of tests carried out in laboratories as part of several projects in the Paris region on Ypresian Clay formation. The soils studied come from deep core drillings taken between 20 and 70 m deep during various geotechnical investigation campaigns. The tests include both static and dynamic tests, making it possible to observe the mechanical behavior evolution of the material according to the stress path used. The different results were achieved using the cyclic triaxial, the resonant column, the shear wave propagation measurements from the Bender Elements, the stress paths and K0 measurements at the triaxial. An analysis of the decrease in the shear modulus is then carried out, which will feed a rheological model and calibrate it according to the confining pressure.
Sonia Fanelli; Lamis Makki; Emmanuel Bourgeois; Fabien Szymkiewicz; P. Reiffsteck
18th European Conference on Soil Mechanics and Geotechnical Engineering (ECSMGE2024)
D - Current and new construction methods
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