Apparatus for forming a dead-end anchorage of a post-tension system
First Claim
1. An apparatus for forming an anchorage of a post-tension system comprising:
- a housing;
a piston member positioned within said housing, said piston member being movable relative to said housing;
a cylindrical member connected to said piston member, said cylindrical member defining a space therewithin; and
a plunger axially movable within said space in said cylindrical member.
2 Assignments
0 Petitions
Accused Products
Abstract
A method and apparatus for forming an anchorage of a post-tension system in which a tendon is positioned within a cavity of an anchor such that an end of the tendon extends outwardly of the cavity, a plurality of wedges are mechanically inserted within the cavity between the tendon and a wall of the cavity, and pressure is applied to an end of the tendon such that the tendon and the wedges are in interference-fit relationship with the cavity. A compression mechanism is used having a cylindrical member and a plunger extending in a channel of the cylindrical member. The wedges are attached to the cylindrical member and the cylindrical member is moved toward the cavity such that the wedges enter a space between the tendon and the wall of the cavity. The plunger applies a compressive force to the end of the tendon when the end of the tendon is in the channel of the cylindrical member.
62 Citations
15 Claims
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1. An apparatus for forming an anchorage of a post-tension system comprising:
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a housing;
a piston member positioned within said housing, said piston member being movable relative to said housing;
a cylindrical member connected to said piston member, said cylindrical member defining a space therewithin; and
a plunger axially movable within said space in said cylindrical member. - View Dependent Claims (2, 3, 4, 5, 6, 7)
a frame receiving said housing therein and having a portion extending outwardly beyond an end of said cylindrical member; and
a fixture having an area suitable for receiving an anchor therein, said portion of said portion of said frame having a surface suitable for abutting a surface of an anchor.
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3. The apparatus of claim 1, further comprising:
a plurality of wedges releasably affixed to an end of said cylindrical member.
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4. The apparatus of claim 3, said plurality of wedges being magnetically affixed to said end of said cylindrical member.
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5. The apparatus of claim 1, said cylindrical member being resiliently mounted within said piston member, said cylindrical member having an end extending outwardly of an end of said piston member.
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6. The apparatus of claim 1, said plunger connected to said piston so as to move through said space within said cylindrical member when a resistive force is applied to an end of said cylindrical member.
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7. The apparatus of claim 1, further comprising:
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an anchor positioned so as to have a wide end of a cavity thereon facing said cylindrical member; and
a tendon extending through said cavity so as to have an end extending outwardly thereof, said space of said cylindrical member having a size suitable for receiving said end of said tendon therein.
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8. A method for forming an anchorage of a post-tension system comprising:
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positioning a tendon within a cavity of an anchor such that an end of the tendon extends outwardly of said cavity;
mechanically inserting wedges within said cavity between said tendon and a wall of said cavity;
applying pressure onto said end of said tendon such that said tendon and said wedges are in interference-fit relationship within said cavity; and
forming a compression mechanism having a cylindrical member and a plunger interior of said cylindrical member. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15)
attaching said wedges to said cylindrical member; and
moving said cylindrical member toward said cavity such that said wedges enter a space between said tendon and said wall of said cavity.
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10. The method of claim 9, said step of attaching comprising:
magnetically affixing a wide end of said wedges onto an end of said cylindrical member.
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11. The method of claim 8, said cylindrical member defining an interior space therewithin, said plunger being axially movable through said interior space.
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12. The method of claim 11, said step of applying pressure comprising:
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moving said cylindrical member toward said cavity such that said end of said tendon resides within said interior space of said cylindrical member; and
moving said plunger toward said end of said tendon such that an end of said plunger applies pressure onto said end of said tendon within said space.
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13. The method of claim 8, further comprising:
affixing said anchor within a fixture such that a wide end of said-cavity faces said wedges.
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14. The method of claim 12, further comprising:
retracting said cylindrical member and said plunger from said end of said tendon after pressure is applied to said end of said tendon.
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15. The method of claim 14, further comprising:
applying pressure against a flange of said anchor during said step of retracting.
Specification