Force analysis of tensile reinforcement in bilaterally-encapsulated geogrid-reinforced earth embankments

The force characteristics of the reinforcement materials in bilaterally wrapped geogrid-reinforced earth embankments play a crucial role in the deformation and stability of the embankment structure. Based on the general pattern of reinforcement force determined by model tests, the static equilibrium method is used to theoretically analyze the force on the reinforcement of bilaterally wrapped geogrid-reinforced earth embankments. A sensitivity discussion is conducted on the relevant parameters affecting the reinforcement force, and the specific characteristics of the influence of these parameters are analyzed. The study found that the shear stress on the surface of the reinforcement material exhibits a two-stage single-peak curve distribution pattern, with the location of the peak points of the curve closely related to the intersection points of each layer of reinforcement-sliding surfaces. The axial force of the reinforcement material shows an asymmetric single-peak curve distribution pattern. The sensitivity of the factors affecting the maximum axial force of the reinforcement from greatest to least is cohesion, slope angle, internal friction angle, top load, and soil weight. As the spacing between reinforcements increases, the position where the maximum axial force of the reinforcement takes on gradual shifts towards the center of the embankment; the peak point of the shear stress on the reinforcement surface gradually moves towards the interior of the embankment in the free segment, while it remains essentially unchanged in the anchorage segment.