| 摘要 |
PROBLEM TO BE SOLVED: To provide a replacement device and a replacement method for a main colum material that do not require chipping of concrete or excavation of the soil around a foundation body.SOLUTION: A replacement device for a main column material includes a fixture fixed on each of a plurality of neighboring main column materials connected on both ends of a main column material to be replaced, and a support member installed between the fixtures with a jack inserted. The fixture on at least one side is installed while being overlapped with a part of a lap joint, and includes: a plate-form connection metal fitting installed so as to come into contact with both flange surfaces of a neighboring main column material; a temporary fastening bolt inserted into a bolt hole of the lap joint of the neighboring main column material from a bolt hole of the connection metal fitting, the temporary fastening bolt having a nominal length that equals the total of the thicknesses of the connection metal fitting and the neighboring main colum material; a bolt holding metal fitting positioned so as to hold down a bolt head of the temporary fastening bolt, and connected to the connection metal fitting for holding the bolt head of the temporary fastening bolt from both sides; and a holding metal fitting connected with the connection metal fitting for holding the neighboring main column material from both sides. |
