To reduce the horizontal displacement of a pile head and a bending moment arising at the pile head to improve the horizontal resistance of the pile.
A drilled hole 4 for placing a pile 5 therein and a foundation consolidating part 4B for supporting the pile 5 are formed on the ground 3, using a drill bit 2. Fillers including removed soil removed upon drilling the drilled hole 4 are put back in the drilled hole 4, and the ground 3 near the head of the pile 5 is stirred as a hardener is injected onto the ground 3, and then the pile 5 is set in an underground position. It is preferable that the drilling bit 2 having an expandable drilling edge 6 capable of radial expansion be used when the drilled hole 4 and the foundation consolidating part 4B are formed, and that the expandable drilling edge 6 be pulled up without expanding it at a part 4A near the pile head that is the subject of soil improvement when the drilling bit 2 is pulled out.
| JPH02308088 | DRILL DEVICE |
| JP2005068797A | 2005-03-17 | |||
| JP2003003462A | 2003-01-08 | |||
| JP2003082648A | 2003-03-19 |
Toshifumi Onuki
Akihiko Eguchi
Kazuhiko Naito