Mandrel closure and process for in situ pile formation

Details Mandrel closure and process for in situ pile formation Mandrel closure and process for in situ pile formation

1980-07-22

1983-05-24

Corbin, David H.

Hydraulic and earth engineering

Foundation

Columnar structure

405243, E02D 542

Patent

active

043848095

ABSTRACT:
A hollow mandrel has a chute at one side near its top through which concrete is poured, and an open top through which re-inforcing steel is inserted. An expansible closure having an air conduit leading to its lower end is lowered into the mandrel below the chute and expanded, and air is forced into the mandrel while a lifting force is applied to it.

REFERENCES:
patent: 2656684 (1953-10-01), Rios et al.
patent: 3209546 (1965-10-01), Lawton
patent: 3385070 (1968-05-01), Jackson
patent: 4158518 (1979-06-01), Rusche

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