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

The utility model discloses a box-type frame for a roadbed and a reinforced concrete box-type frame roadbed, which are formed by longitudinally arranging a preset number of box-type frames for the roadbed, 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 plateand at least two side wall plates located between the top plate and the bottom plate. The upper ends and the lower ends of the side wall plates are connected with the top plate and the bottom plate correspondingly. 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 a top plate, a bottom plate and side wall plates. The top plate and the bottom plate extend for a preset length on