| 摘要 |
PROBLEM TO BE SOLVED: To provide a rotary embedding method for a pile by which a quantity of an excavated removal earth is reduced, a rotary toque is reduced upon rotary embedding of the pile, and displacement of a pile core or a bend (escape) hardly occurs. SOLUTION: After a ground 3 is excavated with a diameter larger than an outer diameter of a body of the pile 5 and smaller than the outer diameter of a spiral blade 5a, an expansively excavated hole 4b is formed at the front end part of the small-diameter excavated hole 4a, and the expansively excavated hole 4b is filled with a hardening material. Then a predetermined position from the expansively excavated hole 4b to the surface of the ground 3 is excavated by means of hauling up with a diameter larger than the outer diameter of the spiral blade 5a. The pile 5 is rotatively embedded in the excavated hole 4 so that the spiral blade 5a may be settled inside the expansively excavated hole 4b. COPYRIGHT: (C)2005,JPO&NCIPI
|
