Numerical Simulation of Reinforced Granular Blanket over Granular Pile Under Vertical Loading

Granular pile installation is a typical method for treating soft clay soils. In the current study, Mohr–Coulomb failure criteria were considered for the granular pile, granular blanket, expansive soil, and geogrid layers as reinforcement. Finite-element analyses were carried out to simulate the behaviour of multilayer geosynthetic-reinforced granular beds over granular pile-reinforced soft soil using the PLAXIS 2D. Those from the experiments strongly validate the findings of the current review. To better understand the mechanism of the load settlement curve in cases of regular granular piles (OGPs) and Reinforced Granular Blanket (RGB) over Granular Pile (GP) under Vertical Loading, significant research was undertaken. Additionally, parametric analyses were performed to examine the effects of variables like the number of variations in the reinforcing geogrid and its placement in the granular blanket over the granular pile. The findings showed that reducing the maximum settlement is not as successful when using multiple geosynthetic reinforcements with granular piles. However, when granular piles are not employed, a multilayer reinforcement system effectively reduces the maximum settling. Additionally, it demonstrated that the amount of stress concentration proportion increases significantly in the presence of geosynthetic reinforcement compared to the amount when it is absent. According to numerical results, placing a GB over a granular pile with a geogrid layer accelerates stress transformation to the depth of OGP. Thus, the higher zone of the OGP experiences a reduction in stress concentration.