The topic is the modeling of geogrid-reinforced layers. The objective is to discuss possibilities that the numerical approach offers to study the problem, synthesizing the individual importance of some aspects related to the modeling by the Discrete Element Method (DEM). Soil-reinforcement interaction is still one of the geotechnical problems that require a better understanding. The three-dimensional configuration of geotextiles and geogrids shows complex behavior when granular media embedded these structures. Studying this behavior experimentally is often difficult since there are mechanisms of interaction between granular particles and geogrid members that are difficult to evaluate in a laboratory apparatus. In this case, the numerical approach represents a powerful alternative for the evaluation and development of this type of problem. DEM can handle the localized behaviors in the contacts as well as the nature of the granular material using a relatively small number of parameters. Thus, this work presents considerations for discrete modeling of geogrid-reinforced layers. An overview of three possible numerical approaches is presented, highlighting essential points for the problem. Given the potential for DEM modeling and the development of this approach recently, this paper emphasizes discrete modeling. Thus, it presents considerations on the modeling of granular and geogrid material, sample preparation, and types of simulation. The findings suggest great potential for geogrid modeling by deformable elements, which makes it possible to progress with purely discrete studies to understand the behavior of the interface between granular material and geogrid.
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