Box-type frame for roadbed and box-type frame roadbed

The utility model discloses a box-type frame for a roadbed and a box-type frame roadbed, the box-type frame roadbed comprises a preset number of box-type frames for the roadbed, the box-type frames for the roadbed are arranged longitudinally, and expansion joints with preset lengths are arranged between the adjacent box-type frames for the roadbed at intervals; the box type frame for the roadbed comprises a top plate, a bottom plate and at least two side wall plates located between the top plate and the bottom plate, and the upper ends and the lower ends of the side wall plates are connected with the top plate and the bottom plate respectively. The at least two side wall plates are transversely distributed on the top plate or the bottom plate, and a preset distance is reserved between every two adjacent side wall plates; the box type frame for the roadbed further comprises at least one transversely-closed rectangular cavity defined by the top plate, the bottom plate and the side wall plates. The top plate and