Structure and method for jacking absorption tower from middle segment

The invention discloses a structure and a method for jacking an absorption tower from a middle segment. In the structure, a plurality of supporting upright posts are welded on the inner wall below a cut part jacked in the middle segment of the absorption tower, a plurality of expansion loop clamping plates are welded on the inner wall above the cut part jacked in the middle segment of the absorption tower, expansion loops are positioned below the clamping plates, plugged at the inner side of the upper segment of the absorption tower and tightly expanded with the inner wall of the upper segment of the absorption tower, the supporting seats of hydraulic jacks are fixedly installed on the supporting upright posts, and the expansion loops are supported by ejector rods thereof from the bottom.After the absorption tower is cut into the upper segment and a lower segment, the upper segment of the absorption tower can be jacked by synchronously starting each hydraulic jack to realize jacking.In the jacking process, a special crane does not need to be used, and the invention also has no requirement for the surrounding environment of the absorption tower and is simple and convenient.