| 摘要 |
PURPOSE:To easily repair a foundation in a short time by a method in which small-diameter long holes 9 are continuously drilled in the foundation, the repairing portion is divided into blocks, hard spheres are inserted into the long holes of the bottom of the blocks, and the blocks are removed. CONSTITUTION:Small-diameter long holes 9 are continuously drilled from the outside A of a foundation 5 by using a concrete cutter 8, the repairing section is blocked, and hard spheres 10 are inserted into the long holes 9 to reduce friction. Also, using the small spheres as rollers, the blocks are drawn out by a chain block 11 and removed, and a temporary receiving base 12 is set to prevent the inclination of a machine 1. In the same way, small-diameter long holes 9 are continuously drilled in the inside portion B, the portion is blocked, hard spheres are inserted into the long holes 9, and the blocks are drawn out by the chain block 11, etc., by using the hard spheres as rollers. A formwork 6 is lastly put between the foundation 5 and the machine 1 and a non-shrink cement material is packed into the formwork.
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