Slipform apparatus for vertical bores

Details Slipform apparatus for vertical bores Slipform apparatus for vertical bores

E - Fixed Constructions

21

D

61/60

E21D 5/04 (2006.01) E21D 5/00 (2006.01)

Patent

CA 1088331

TITLE: SLIPFORM APPARATUS FOR VERTICAL BORES Abstract of the Disclosure A slipform apparatus is described for forming a continuous up- right monolithic lining within a preformed upright shaft. The slipform is provided in three independently movable sections that may be lowered into the shaft. Wet concrete is delivered to the sections and dispensed outwardly of the sections to form the lining. The formed sections hold the wet concrete against the walls of the shaft and progressively form a cylindrical upright bore within the shaft. As concrete is delivered to the slipform, the individual sections are moved in an "inchworm" effect in conjunction with an expansion mechanism to automatically lift itself upwardly within the shaft as the lining is being formed. A steering mechanism is provided to enable selective angular movement of the slipform in a nonvertical plane.

314797

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