| 摘要 |
PURPOSE:To enable formation of an oblique pile, by a method wherein the base end of a leader is laterally pivotally secured to the front of a retainer body, the upper part of the leader is mounted to the rear of the retainer body, and is retained by a back stay having an expanding and contracting device. CONSTITUTION:With an expanding and contracting device 9, installed to a back stay 6, actuated, a leader 4 is inclined around a pin 5 to bring it into a backward inclining orientation. Then, an elevator frame 13 is suspended from the top part of the leader 4 through a wire 16, and an elevator table 18 is suspended below the leader 4 through a wire 21. With a rotation driving device 22 operated, a casing 17 is rotated, the wire 16 is unwound, and the casing 17 is penetrated into a ground. Thereafter, sand is charged into a fixed pipe 25 through a hopper 26, and after, with a vertical driving device 28 for an inner tube 27 and a vibrator 29 actuated, sand is consolidated, the sand is pushed out from the lower end of the casing 17 to form an oblique pile. |
