The utility model relates to the technical field of highways, and discloses a highway
subgrade bearing structure which comprises a soil base layer, a stone base layer and an
asphalt surface layer, the stone base layer is arranged on the upper surface of the soil base layer, and the
asphalt surface layer is arranged on the upper surface of the stone base layer; the soil base layer comprises a stable soil layer, a limestone layer and a
cement layer, the limestone layer is arranged on the upper surface of the stable soil layer, and the
cement layer is arranged on the upper surface of the limestone layer; the stone base layer comprises a
cement macadam layer and a cement gravel layer, and the cement gravel layer is arranged on the upper surface of the cement macadam layer; the
asphalt surface layer comprises a lower surface layer, a middle surface layer and an upper surface layer, the lower surface layer, the middle surface layer and the upper surface layer are sequentially laid from bottom to top, the lower surface layer adopts a coarse grain type modified asphalt layer, the middle surface layer adopts a medium grain type modified asphalt layer, and the upper surface layer adopts a
fine grain type modified asphalt layer. According to the utility model, the soil, the stone and the asphalt material are combined, so that the density and the structural strength of the roadbed are improved, the
bearing capacity of the roadbed is improved, and the service life of a road is prolonged.