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US 4,575,283 AGranted
Device and process for making unclad concrete piles
OwnerClaudio Guandalini, Fausto Massariinventors
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OwnerClaudio Guandalini, Fausto Massariinventors
Estimating the term…
The device comprises: a beating cap (1) provided with a conduit (2) for introduction of the concrete under pressure; a pipe form (3) to be sunk and pulled out gradually as the concrete is introduced, the pipe form having a fastening (4) connected to a pressure gauge (4') for reading of the pressures acting on the concrete; a chuck (5) located between the pipe form (3) and having a conduit for passage of the concrete (2) under pressure and a cylindrical sheath (6) for reducing volume; two expandable tubular rings (7,7') to make a seal for the air under pressure in the air chamber (8) between the pipe form (3) and the chuck (5) to achieve locking between the chuck (5), the pipe form (3) and the beating cap (1); a one-time bottom (9) to prevent penetration of dirt in the pipe form during sinking; The raising of the pipe form (3) gradually as the concrete is introduced being facilitated by the pressure that is exerted in air chamber (8) by the effect of the introduction of the concrete.
An apparatus for making unclad concrete piles, comprising a beating cap having a conduit for the introduction of concrete under pressure, a pipe form to be sunk and pulled out gradually as the concrete is introduced, the pipe form having a connection to a pressure gauge for reading the pressures acting on the concrete, sealing means sealing between the beating cap and the pipe form to seal air under pressure within the pipe form, a bottom at the base of the pipe form to prevent dirt from penetrating into the pipe form during sinking, the bottom having securing means to hold reinforcement of the concrete pile, whereby the pipe form can be gradually raised as concrete is introduced and the air pressure within the pipe form rises due to the introduction of the concrete, the securing means preventing the reinforcement from rising with the pipe form.
A process for making unclad concrete piles, comprising placing a hollow pipe form on the ground at the desired location for the pile, hammering the pipe form into the ground with a bottom closing the pipe form, until the desired depth is reached, introducing concrete reinforcing means into the pipe form, sealing the top of the pipe form, pumping concrete into the pipe form until a predetermined pressure is reached within the pipe form by virtue of the introduction of the concrete into the sealed pipe form, and gradually raising the pipe form during introduction of further concrete while maintaining the air pressure in the pipe form above the concrete at about said predetermined pressure.
Dependencies are inferred from the claim text.