| 摘要 |
PROBLEM TO BE SOLVED: To provide a casing driving method which makes a cylindrical pile body applicable to a landslide preventive pile, steel pipes different in type, etc., when the cylindrical pile body is driven into hard ground, bedrock, etc., can arbitrarily select separate locations from a driving apparatus to arbitrarily drive the pile, and can drive a casing but facilitates correction if a bent hole, etc., are formed, to thereby drastically enhance the working efficiency of the driving apparatus. SOLUTION: The driving apparatus 7 is set on the hard ground, then a pedestal is set on a cut, and after confirmation of the verticality of the apparatus by a transit and a plumb bob, an air line and a cap tire cable are connected to the apparatus. Under the above conditions, an air hammer is aligned with a pile core, and the verticality of the casing is confirmed by the transit, the plumb bob, etc., at right angles along two directions, to thereby carry out driving by a down-the-hole hammer. At this time, rotary drilling is carried out by an excavation mechanism, then an injecting apparatus is press-connected to the cylindrical pile body 8' from the outside thereof, and a projection is attached to the external surface 8' of the cylindrical pile body. In this manner, vertical propulsion of the pile body is carried out, and separate locations 11, 12, 13,... can be arbitrarily selected, to thereby carry out driving work. |
