The invention relates to an expansion shell bearing plate. The expansion shell bearing plate comprises a tapered bearing plate, a through hole allowing a rod body of an anchor rod is formed in the center of the tapered bearing plate in the axial direction, the tapered bearing plate is provided with a flat plate part and a tapered part, a connecting end and a free end are arranged at the two ends of the tapered part in the axial direction, the outer
diameter of the connecting end is larger than that of the free end, an annular
extrusion table is formed at the joint of the connecting end and theflat plate part, and the annular
extrusion table is provided with a first annular yielding pad. According to the anchor rod, when prestress is applied, due to the fact that the first annular yieldingpad is arranged on the annular
extrusion table, a second annular yielding pad is fixed to the end face of the free end, and the tapered bearing plate can release certain deformation when extruding agrouting material, that is, certain 'yielding' deformation is produced. In the process of 'yielding', the tapered surface of the tapered part can extrude the surrounding grouting material in the radial direction, thus the grouting material produces radial expansion, then extrudes surrounding rock and earth
mass, consequently normal stress of the interface between the grouting material and the rockand earth
mass is greatly increased, the
bonding strength of the interface between the grouting material and the rock and earth
mass can be significantly enhanced, and thus the uplift
bearing capacity of the anchor rod is greatly improved.