Hole-boring method and system for making cast-in-situ piles
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United States of America Patent
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-
Dec 27, 2005
Grant Date -
May 15, 2003
app pub date -
Oct 15, 2002
filing date -
Oct 24, 2001
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The invention relates to a method of boring a hole using a boring system constituted by a simple auger and a dip tube slidably mounted in said auger, said dip tube being provided at its bottom end with a tool. The method comprises the following steps: causing said auger and said dip tube to descend and to rotate simultaneously, said tool on the dip tube being substantially level with the bottom end of the auger; interrupting the descent and rotation of said auger so that the auger constitutes anchor means for anchoring the boring system in the ground; and causing the dip tube to descend and rotate on its own, whereby the tool of the dip tube performs boring by displacing ground at the bottom end of the borehole, thereby compacting the ground.
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