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    • 1. 发明授权
    • Method and apparatus for forming enlarged pile heads
    • 用于形成放大桩头的方法和装置
    • US06168350A
    • 2001-01-02
    • US09255728
    • 1999-02-23
    • Graham John Bartlett
    • Graham John Bartlett
    • E02D538
    • E02D5/385E02D27/16E02D2200/1607E02D2250/0007E02D2250/0038E02D2300/002
    • A method of forming a cast-in-situ pile with an enlarged head, wherein a collar (1,13) is releasably affixed to the lower end of a piling tool (10) and the piling tool (10) and the collar (1,13) are driven to a first depth and the collar (1,13) is released from the piling tool (10). The piling tool (10) is then driven to a second depth, the piling tool (10) passing freely through a central aperture (2,14) of the collar (1,13), which remains at the first depth. The piling tool (10) is then withdrawn, and concrete or grout (20) is supplied to the lower end of the piling tool so as to form a cast-in-situ pile (22). When the lower end of the piling tool (10) again reaches the first depth, the collar (1,13) is lifted from the ground and concrete or grout (20) is supplied into the void left thereby so as to form a pile (22) with an enlarged head (23).
    • 一种形成具有扩大头部的原位桩的方法,其中,将套环(1,13)可释放地固定到打桩工具(10)的下端和打桩工具(10)和套环(1) ,13)被驱动到第一深度并且所述套环(13,13)从所述打桩工具(10)释放。 打桩工具(10)然后被驱动到第二深度,打桩工具(10)自由地穿过保持在第一深度的套环(1,13)的中心孔(2,14)。 然后抽出打桩工具(10),并将混凝土或灌浆(20)供应到打桩工具的下端,以便形成浇注桩(22)。 当打桩工具(10)的下端再次达到第一深度时,将套环(1,13)从地面提起,并将混凝土或浆料(20)供给到左边的空隙中,以便形成桩 22)具有扩大的头部(23)。