DEVICE FOR ALTERNATELY JACKING ADDED STOREY OF BUILDING WITH HIGH-STRENGTH CONCRETE COLUMNS AND STEEL SLIDEWAYS AND CONSTRUCTION METHOD THEREFOR

The present invention provides a device for jacking and adding story of a building with high-strength concrete columns and steel slideways alternately and a construction method thereof. The device includes steel slideways (2) respectively provided on each frame column (1) and movable steel brackets provided on opposite side surfaces of the frame column (1). The movable steel bracket includes an upper fixed bracket (3) and a lower lifting bracket (4). The upper fixed bracket (2) is fixed to the frame column (1), and the lower lifting bracket (4) is hung on the steel slideway (2). The lower lifting bracket (4) is provided thereon with a jack (5). The bottom of the jack (5) is mounted at the top of the lower lifting bracket (4), and the top of the jack (5) abuts against the bottom of the upper fixed bracket (3). The construction method of using the device can expand a usable space under the premise of ensuring the original appearance of a building, with a short construction period and low costs.