In the marine landfill sites, the alluvial clay layer is mainly used as the impermeable layer at the bottom of the site. This paper provides initial findings regarding the utilization of tire-derived geomaterials (TDGM) in the form of a horizontal layer placed between waste and alluvium clay layers in marine landfill sites. The purpose of installing the reinforcement layer is to protect the alluvium clay layer (Impermeable layer) from waste input. On the other hand, the reinforcement layer is also placed underneath the waste to ensure the collection and drainage of leachate during the degradation and the consolidation of waste. The effectiveness of such configuration is investigated numerically with the PLAXIS 2D software. The Sekiguchi-Ohta model (Viscid model) and hardening soil model are used as the material model, so that the settlement behavior was captured. The purpose of this research is to evaluate the effectiveness of horizontal reinforcing inclusion made from TDGM in mitigating settlement and damage of the alluvium clay layer.