Numerical modelling of rigid inclusion reinforced road platform, under surface loading and mobile loading
Numerical modelling of rigid inclusion reinforced road platform, under surface loading and mobile loading
In the context of the French National Project ASIRI+, the behaviour of rigid inclusion systems with thin platforms has been studied using physical centrifuge models. These systems are particularly useful in cases of road construction on soft soil subjected to significant settlement, or for studying the behaviour of rigid inclusion systems during construction phases. However, these systems differ from classic reinforcement systems with rigid inclusions due to the specificity of the loading. Indeed, on linear infrastructure or circulating platforms, the loadings are limited to small areas, potentially loading only one inclusion at a time and failing to generate a beneficial arching effect. Moreover, these loadings are usually moving over time, which modify load transfer and repartition in the rigid inclusions. To complement the centrifuge model study, we propose a numerical study in this paper to compare results and help analyse the behaviour of these systems. We first discuss the model fitting on the centrifuge results, followed by a parametric study to analyse the effect of key parameters on load transfer and failure mechanisms. Lastly, we developed a model representing the behaviour of these structures under mobile loading. This allowed us to study the evolution of the load transfer mechanism and the elastic-plastic behaviour of the load transfer platform under several loading cycles.
Thibault Badinier; N. Ouechten; T. Dubreucq; Luc Thorel
18th European Conference on Soil Mechanics and Geotechnical Engineering (ECSMGE2024)
A - New developments on structural design
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