PILE DRIVING METHOD

To provide a pile driving method which can reinforce a pile head part of a pile driven into a ground, and can improve driving of a pile when the pile is retained at a high level.SOLUTION: A pile driving method incudes: a first driving step S2 of driving a steel pipe pile 1 into a ground 30 up to a position where a spiral blade 13 reaches a ground surface 31 while driving the steel pipe pile 1 into the ground while rotating a connection jig 10 in one direction by a driving machine 20; and a second driving step S3 of further driving the steel pipe pile 1 until a pile head part 1b in an exposed state is stored in a recessed part 32, while forming the recessed part 32 on the ground surface by compacting the ground by the spiral blade 13 while rotating the connection jig 10 in one direction by the driving machine 20, after the first driving step.SELECTED DRAWING: Figure 6 【課題】地盤に打ち込まれた杭の杭頭部を補強することができ、杭が高止まりしたときに杭の打ち込みを改善することができる杭の打設工法を提供する。【解決手段】杭の打設工法は、打設機２０で、接続治具１０を一方向に回転させながら、鋼管杭１を地盤に打ち込みつつ、螺旋翼１３が地表に到達する位置まで鋼管杭１を地盤に打ち込む第１打設工程Ｓ２と、第１打設工程後、打設機２０で、接続治具１０を一方向に回転させながら、螺旋翼１３で地盤３０を締め固めることにより地表３１に陥凹部３２を形成しつつ、陥凹部３２に杭頭部１ｂが露出した状態で収容されるまで鋼管杭１をさらに打ち込む第２打設工程Ｓ３と、を含む。【選択図】図６