Longitudinal jacking device for closure segment of continuous rigid frame bridge

The utility model discloses a longitudinal jacking device for a closure segment of a continuous rigid frame bridge. The longitudinal jacking device comprises two stiff roof frameworks arranged above the closure segment. One end of each stiff roof framework is fixedly connected with a first main beam roof on one side of the closure segment. Reaction frames corresponding to the stiff roof frameworks one to one are arranged on a second main beam roof on the other side of the closure segment. The position between the other end of each stiff roof framework and the corresponding reaction frame is provided with a jack used for jacking the stiff roof frameworks so that the distance between main beams on the two sides of the closure segment can be increased. The longitudinal jacking device for the closure segment of the continuous rigid frame bridge is convenient to operate, saves labor and also saves a lot of time so that concrete at the closure segment can be cast as early as possible after the stiff roof frameworks and stiff floor frameworks are locked.