Method of forming consolidating earth columns by injection, the

Details Method of forming consolidating earth columns by injection, the Method of forming consolidating earth columns by injection, the

1991-07-26

1993-06-15

Taylor, Dennis L.

Hydraulic and earth engineering

Foundation

Columnar structure

405240, 405248, 405237, E02D 1504, E02D 27012

Patent

active

052192474

ABSTRACT:
A method apparatus, and product of forming consolidated earth columns of cement grout or mortar to be used, for instance, in building foundations. The method is designed to drastically reduce the time taken to form consolidation columns and to allow consolidation of earth particularly difficult to bore. The method consists of injecting the consolidating grout during the ascent of the drilling tool from the earth supplying air, at the same time, to the pneumatic percussion tool used to make the preliminary drilling.
The plant to put the method into effect comprises a rotating joint manifold (6) at the upper end of the boring drill (11), equipped with tangentially arranged inlets, even inclined; an air manifold (15) to supply compressed air to the pneumatic percussion tool through the external annular chamber (28) of said boring drill (11); a grout distributor (36) equipped with ejection nozzles (38) the axes of which are inclined with respect to the axis of the drill. The column (46) is cylindrical in shape, with transversal projections (47).

REFERENCES:
patent: 1501643 (1924-07-01), Blumenthel et al.
patent: 2920455 (1960-01-01), Ryser et al.
patent: 3228200 (1966-01-01), Dufresne
patent: 3499293 (1970-03-01), Kato
patent: 3507124 (1970-04-01), Turzillo
patent: 4397588 (1983-08-01), Goughnour

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