Method and apparatus for reducing impedance or core material in

Details Method and apparatus for reducing impedance or core material in Method and apparatus for reducing impedance or core material in

1985-04-01

1989-10-17

Taylor, Dennis L.

Hydraulic and earth engineering

Foundation

Columnar structure

405232, E02D 1500

Patent

active

048742708

ABSTRACT:
A compliant foam is introduced into the bottom of a pile casing being resonantly sonically driven into the ground. The foam mixes with earthen material which has entered the interior of the casing and is presenting impedance to the sonic driving of the pile. This foam material effectively makes the earthen material more compliant and thus effectively lowers the impedance presented by such material, thereby increasing the accoustical "Q" of the resonantly vibrating pile member.

REFERENCES:
patent: 3076513 (1963-02-01), Heaphy
patent: 3312295 (1967-04-01), Bodine
patent: 3375884 (1968-04-01), Bodine
patent: 3766741 (1973-10-01), Hartzell

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