Open caisson type box culvert structure

An open caisson type box culvert structure comprises a plurality of open caissons, each open caisson comprises a blade foot, an end expansion section open caisson wall and a standard section open caisson wall, a plurality of bottom plate transverse supports are arranged at the connecting positions of the blade feet and the two open caisson walls, and bottom plates are laid between the bottom plate transverse supports; two reserved holes which are formed in the open caisson at intervals through a middle partition wall are formed in the open caisson, a first supporting beam is arranged on the middle partition wall, second supporting beams with the same height as the first supporting beam are arranged on the wall of each open caisson, and a plurality of top plate cross braces are laid between the second supporting beams and connected with the first supporting beams. A soil outlet hole for laying a top plate is formed between the two supporting beams and the top plate cross brace; the open caisson walls of the en