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Communication Dans Un Congrès Année : 2022

Numerical and Experimental Characterization of the Seismic Parameters of a Soft Soil Reinforced with Rigid Inclusions

Résumé

The characterization of the properties of soft soils reinforced with periodically placed cylindrical rigid inclusions is essential to improve the lifetime of railway tracks submitted to the critical speed issue. This work is about the use of numerical and experimental resources to characterize the velocity of surface waves of these reinforced media. The numerical approach is presented, using the spectral elements method (SEM3D) coupled with non-periodic homogenization. The homogenized medium is used to modify a discontinuous media into a medium with smoother contrasts of properties. Into the context of numerical simulations, it allows to suppress the sharp discontinuities, and thus reduces the cost of the computation linked to the mesh refinement. A cross-validation is made with a reduced scale experimental model, performed with the high-quality measurement bench MUSC. Two different configurations are studied, the first one with three inclusions is used to cross-validate the use of the homogenization method with the experimental measurements and the second is made on more complex case containing a high number of inclusions on the same type of resins.
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Dates et versions

hal-04485332 , version 1 (01-03-2024)

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Citer

M. Darche, Donatienne Leparoux, Yann Capdeville, Olivier Durand. Numerical and Experimental Characterization of the Seismic Parameters of a Soft Soil Reinforced with Rigid Inclusions. NSG2022 28th European Meeting of Environmental and Engineering Geophysics, Sep 2022, Belgrade, Serbia. pp.1-5, ⟨10.3997/2214-4609.202220126⟩. ⟨hal-04485332⟩
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