PROBLEM TO BE SOLVED: To prevent a pile center deviation in which a center deviation of a precast pile from a predetermined position occurs when the precast pile is embedded in a steel pipe soil cement pile method, other pre-boring method or the like.;SOLUTION: This device comprises a base board having a hole with the diameter larger than the precast pile to be installed, a guide cylinder having an inner diameter larger than that of the precast pile to be installed which is fixed concentrically to the hole of the base board, and a bearing for rotation mounted to the inner surface of the guide cylinder, and at least three bearings for rotation are installed to the inner surface of the guide cylinder.;COPYRIGHT: (C)2002,JPO
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