Apparatus and method for constructing compacted granular or ston

Details Apparatus and method for constructing compacted granular or ston Apparatus and method for constructing compacted granular or ston

1991-10-24

1994-01-18

Reese, Randolph A.

Hydraulic and earth engineering

Foundation

Columnar structure

405233, 405240, 405248, E02D 546

Patent

active

052795020

ABSTRACT:
Compacted granular or stone columns are constructed in soil to increase the load-bearing capacities of the native soil. An elongated hollow tubular member is penetrated down into the soil to a predetermined depth and then the granular material or stone for constructing the column is fed down through this member and out the lower end thereof where it is then driven outwardly in a radial direction by an impeller which is exposed, at least in part, at the lower end of the tubular member, as the hollow tubular member is either penetrating or being withdrawn from the soil at a predetermined rate to thereby forceably compact this granular or stone material in a substantially radial direction to construct a stone column. Sufficient forces may be applied by the impeller to the granular or stone material to fracture the surrounding soil.

REFERENCES:
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patent: 3255592 (1966-06-01), Moor
patent: 3438212 (1969-04-01), Turzillo
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patent: 4126007 (1978-11-01), Mars
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patent: 4496011 (1985-01-01), Mazo et al.
patent: 4601613 (1986-07-01), Wolf
patent: 4637758 (1987-01-01), Tamaki et al.
patent: 4730954 (1988-03-01), Sliwinski et al.

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