| 摘要 |
PROBLEM TO BE SOLVED: To provide a jack-up method for drive-into working platform which can be installed at the same level with the ground without disturbing the work of slab concrete for ground floor. SOLUTION: Bolt holes in the height direction are drilled at predetermined intervals to both the upper side surfaces of a body platform pile 11, a jack 22 and a push-up support 23 are suspended from a sleeper 15 at one side surface side among both the side surfaces, at the other side surface side, a height adjusting member 24 and a jack 25 below the height adjusting member are suspended from the same sleeper at the other side surface side, supports 26 are suspended below the jack respectively, each push-up support and the support 26 are alternately pushed out along the body platform pile while alternately fixing to the body platform pile with bolts and nuts, a reaction is obtained for the push-up support 23 or the support 26 and the floor beam is raised to a predetermined height where the height adjusting member can be inserted from the upper end portion of the body platform pile by the jack, then the sleeper is raised by the jack provided at the push-up support into which the height adjusting member can be inserted from the upper end portion of the body platform pile by the jack, thereafter, the sleeper is supported by the push-up support fixed to the body platform pile and the jack located at the upper portion and, at that time, the work for installing the height adjusting member between the sleeper and the upper end portion of the body platform pile is carried out.
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