DEVICE FOR ERECTING CAST-IN-PLACE PILE Russian patent published in 1996 - IPC

FIELD: civil engineering. SUBSTANCE: device has casing and ramming plate attached to it. Conical concrete conduit passes through the ramming plate. Free face of the ramming plate has screw surface with asymmetric opening of the concrete conduit in its upper part. Casing and conical concrete conduit are made so that continuous partition is placed along their cavities to form two passages. Lower portion of the partition placed in the concrete conduit is of arched cross section. The center of the arch is coincident with lengthwise axis of the casing. Partition edge is projected beyond the level of upper portion of the screw surface of the ramming plate. In so doing the casing and conical concrete conduit are made so that additional continuous partition is placed along their cavities to form additional passage. Lower portion of the additional partition in the concrete conduit is of arched cross section with the center of the arch being coincident with lengthwise axis of the casing. Pipelines to pressurize liquid phase of corrosion resistant insulating material may be placed along cavities of the casing conical concrete conduit. EFFECT: high productivity. 3 cl, 5 dwg