Method of setting a pile without noise or vibration and apparatu

Details Method of setting a pile without noise or vibration and apparatu Method of setting a pile without noise or vibration and apparatu

1977-07-14

1979-03-20

Purser, Ernest R.

Boring or penetrating the earth

Cutter element laterally shiftable below ground

Cutter element shifted by longitudinally relatively movable...

175 67, 175171, 405237, E21B 926, E02D 724

Patent

active

041449428

ABSTRACT:
This invention relates to a method of setting a pile without causing any noise or vibration. A hollow pile is erected along a leader fixed on the ground, a screw auger is inserted through the hollow center of the pile, the screw auger is hung on the leader in such a manner that it can freely move up and down and freely rotate, and the pile is sunk by its own weight as the soil below the bottom of the pile is excavated and the excavated soil is carried above the ground. The present invention further relates to an apparatus for executing the above method. The lower part of the screw auger is constructed in such a manner that it is divided into two parts, inner tube and outer tube, and both tubes can rotate through a certain angle and move up and down in a certain range relatively to each other. Excavating nozzles are disposed at the lower part of the screw auger in such a manner that they can be unfolded at several stages by the relative rotation and the vertical movement of the fluid is directed laterally from the nozzles to enlarge the hole below the pile.

REFERENCES:
patent: 3077235 (1963-02-01), Govin
patent: 3642078 (1972-02-01), Dornfeld et al.
patent: 3839875 (1974-10-01), Matushita
patent: 3848683 (1974-11-01), Persson
patent: 3864923 (1975-02-01), Tunzillo
patent: 3869003 (1975-03-01), Yamada et al.
patent: 3938344 (1976-02-01), Asayama

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