| 摘要 |
PURPOSE:To effectively drive a pile by a method in which a pit is drilled in hard ground only by jet water, and a pile is driven along the pit. CONSTITUTION:A small-diameter pit 7 is drilled in the hard ground 3 by means of jet water directed to the same direction as the driving direction of a pile from a nozzle 6 attached to the tip of a jet pipe 5. The pits 7 are connected annularly to form an annular hole 8, and a steel tubular pile is driven along the hole 8. |
