| 摘要 |
PROBLEM TO BE SOLVED: To efficiently and accurately execute a cast-in-place pile safely at a low cost with longer and accurate vertical strength by using a small-sized mechanical device even in a narrow space site such as building or the like. SOLUTION: A truck 13 for an execution device is conveyed to a specific position to set, in a state to connect a cage 11 to a cover body 7 having a bit 8 around a leader thereof, the cage is set to a easing pipe 5 formed in advance, it is hung up by a wire 16 of the truck 13, a boring is made by an auger 5' of the casing pipe 5, the earth is moved by the auger 5', at the same time, the collapse of a hole wall is prevented, strength is increased, the boring is made and, at the same time, the set of the cage 11 is finished to cast concrete. A cast-in-place pile can be constructed at one action, and besides, a longer cast-in-place pile can be safely formed within a short period of time at one action by the same and small sized mechanical device as required, and it can be manufactured with high safety at a low cost within a short construction period of time.
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