发明授权
US06402432B1 Method for installing load bearing piles utilizing a tool with blade means 失效
使用刀片装置安装承重桩的方法

Method for installing load bearing piles utilizing a tool with blade means
摘要:
A method and apparatus for installing a pile or load-bearing element into soft ground, wherein a non-percussive force, rather than a percussive force such as that applied by a hammer or a jack, is applied to the top of a hole-forming tool or pile (1) so as to push the hole-forming tool or pile (1) in a substantially continuous motion to a first depth into the ground, and wherein the hole-forming tool or pile (1) is then pushed in a non-percussive manner to a second depth while being simultaneously rotated. A cast-in-situ pile is formed in soft ground by pushing a hole-forming tool (1) provided with fins (3) at its base into the ground. Once the required level has been reached, the hole-forming tool (1) is rotated and concrete or grout is pumped through the body of the hole-forming tool so as concomitantly to help displace and replace the soil swept away by the fins (3). The hole-forming tool (1) is then withdrawn, and further concrete or grout is supplied so as to form a predictably-shaped pile with enhanced bearing capacity.
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