Temporary supporting device in hoisting box for block dismantling of concrete box girder bridge

The utility model discloses a temporary supporting device in a hoisting box for block dismantling of a concrete box girder bridge, which belongs to the field of bridge engineering and comprises a girder body, the girder body is sequentially divided into a plurality of groups of block cutting box girders from the middle to two sides according to cutting positions, and a temporary reinforcing device is arranged at a cavity at one end of each block cutting box girder. The temporary reinforcing device comprises a top steel plate and a bottom steel plate, a supporting steel pipe is arranged between the top steel plate and the bottom steel plate, second steel plates are welded to the upper end and the lower end of one side of the supporting steel pipe, diagonal bracing channel steel is arranged on one sides of the second steel plates, drilled holes are formed in the top side of the cavity, and threaded steel is installed in the drilled holes. One end of the deformed steel bar and the bottom steel plate are firmly w