| 摘要 |
PURPOSE:To shorten a construction period by mounting a large number of downward protruded projections to a footing section and preventing a side slipping. CONSTITUTION:A recessed groove 4 is formed at approximately the center of the upper surface of a footing section 2 precast-molded in an approximately plane-shaped section, and a large number of projections 7 with triangular section are shaped to a lower surface section. A foundation 3 is inserted into the recessed groove 4 for the footing section 2 installed after excavating the ground, and a lower-end male screw section 9b for a long-sized anchor bolt 9 inserted into a through-hole 8 for the body 3 is screwed to a buried nut 5 in the recessed groove 4 while a fixed nut for an upper-end screw section in the bolt 9 projected to the upper section of the body 3 is tightened, thus unifying the body 3 with the footing section 2. Accordingly, the projections intrude into the ground, and the side slipping of the footing section is prevented, thus eliminating the need for broken stone foundation, then shortening a construction period.
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