Method for forming pier foundation columns

Details Method for forming pier foundation columns Method for forming pier foundation columns

1977-10-27

1979-08-21

Shapiro, Jacob

Hydraulic and earth engineering

Foundation

Columnar structure

405222, 405257, E02D 540

Patent

active

041651987

ABSTRACT:
This invention comprises a technique for constructing concrete foundation columns in underwater locations, wherein the steel casing members used to form the columns may be recovered for subsequent re-use. In the technique, an inner and outer casing are partially imbedded in the ground submerged in the water and in concentric relationship with one another. The annulus formed between said inner and outer casing is filled with unconsolidated sand, while the inner casing is filled with reinforcing material and concrete to form the column. The inner casing is then vibrated at a suitable frequency to reduce the friction between it and the sand and concrete, whereby the inner casing may then be drawn upwardly and from between said concrete and the sand. The sand will then support the concrete until after said concrete has hardened, whereupon the outer casing may then be removed, either by vibration or by conventional techniques.

REFERENCES:
patent: 3316723 (1967-05-01), Schutte
patent: 3385070 (1968-05-01), Jackson
patent: 3543525 (1970-12-01), Phares
patent: 3973408 (1976-08-01), Paverman

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