Intermediate anchor and intermediate anchorage system for a post-tension system

• US 6,560,939 B2
• Filed: 03/19/2001
• Issued: 05/13/2003
• Est. Priority Date: 03/19/2001
• Status: Expired due to Term

• Current Assignee: Felix L. Sorkin
• Original Assignee: Felix L. Sorkin
• Inventors: Sorkin, Felix L.
• Primary Examiner(s): Friedman, Carl D.
• Assistant Examiner(s): Glessner, Brian E.
• Application Number:
  US09/810,272
• Publication Number:
  US 20020129570A1
• Time in Patent Office: 785 Days
• Field of Search: 522/236, 522/237, 522/231.3, 522/231.4, 527/421.4, 174/91, 174/92, 244/59, 244/64, 241/226, 403/374.1, 403/368, 403/369
• US Class Current: 52/223.13
• CPC Class Codes: E04C 5/12 Anchoring devices tools or methods for tensioning in situ E04G21/12
• CPC Class Codes: E04C 5/122 the tensile members are anchored by wedge-action
• CPC Class Codes: E04C 5/163 the reinforcements running in one single direction
• CPC Class Codes: Y10T 24/3909 Plural-strand cord or rope

Abstract

An anchor for an intermediate anchorage system including an anchor body having a first wedge-receiving cavity and a second wedge-receiving cavity. The first wedge-receiving cavity has tapered walls narrowing in diameter from the first side to the second side of the anchor body. The second wedge-receiving cavity has tapered walls narrowing in diameter from the second side to the first side of the anchor body. A polymeric encapsulation extends around the anchor body in liquid-tight sealing relationship therewith. A tendon is affixed within one of the first and second wedge-receiving cavities and extends outwardly from the anchor body.

Claims

1. An anchor for an intermediate anchorage system comprising:

a anchor body having a first wedge-receiving cavity and a second wedge-receiving cavity, said anchor body having a first side and a second side, said first wedge-receiving cavity having tapered walls narrowing in diameter from said first side to said second side, said second wedge-receiving cavity having tapered walls narrowing in diameter from said second side to said first side;

a polymeric encapsulation in liquid-tight sealing relationship with an exterior surface of said anchor body, said polymeric encapsulation defining a first cap-receiving receptacle extending outwardly of said first wedge-receiving cavity from said first side of said anchor body, said polymeric encapsulation defining a second cap-receiving receptacle extending outwardly of said second wedge-receiving cavity from said second side of said anchor body;

a first cap removably affixed in liquid-tight sealing relationship with said first cap-receiving receptacle; and

a second cap removably affixed in liquid-tight sealing relationship with said second cap-receiving receptacle.

2. The anchor of claim 1, said polymeric encapsulation defining a first tubular portion extending outwardly from said first wedge-receiving cavity and axially aligned therewith, said first tubular portion extending outwardly from said second side of said anchor body.

3. The anchor of claim 2, said polymeric encapsulation defining a second tubular portion extending outwardly from said second wedge-receiving cavity and axially aligned therewith, said second tubular portion extending outwardly from said first side of said anchor body.

4. The anchor of claim 1, said first and second caps being formed of a polymeric material.

5. An intermediate anchorage system for a post-tension system comprising:

an anchor body having a first wedge-receiving cavity and a second wedge-receiving cavity, said first wedge-receiving cavity narrowing in diameter from a first side to a second side of said anchor body, said second wedge-receiving cavity narrowing in diameter from said second side to said first side of said anchor body;

a first tendon received within said first wedge-receiving cavity;

a first plurality of wedges received in interference-fit relationship between said first tendon and a wall of said first wedge-receiving cavity, said first tendon having an end extending outwardly beyond said second side of said anchor body;

a polymeric encapsulation in liquid-tight sealing relationship with an exterior surface of said anchor body, said first tendon extending outwardly of said polymeric encapsulation, said polymeric encapsulation defining a first tubular portion extending outwardly from said first wedge-receiving cavity and axially aligned therewith, said first tendon extending through said first tubular portion;

a second tendon received within said second wedge-receiving cavity; and

a second plurality of wedges received in interference-fit relationship between said second tendon and a wall of said second wedge-receiving cavity, said second tendon extending outwardly beyond said first side of said anchor body, said polymeric encapsulation defining a second tubular portion extending outwardly from said second wedge-receiving cavity and axially aligned therewith, said second tendon extending through said second tubular portion.

6. The system of claim 5, said polymeric encapsulation defining a first cap-receiving receptacle extending outwardly from said first wedge-receiving cavity from said first side of said anchor body, the system further comprising:

a first cap removably affixed to said cap-receiving receptacle, said first tendon having an end positioned interior of said first cap.

7. The system of claim 5, said polymeric encapsulation defining a second cap-receiving receptacle extending outwardly from said second wedge-receiving cavity from said fsecond side of said anchor body, the system further comprising:

a second cap removably affixed to said second cap-receiving receptacle, said second tendon having an end positioned interior of said second cap.

8. A method of post-tensioning an intermediate anchorage in a post-tension system comprising:

forming a dead-end anchorage having a first tendon affixed thereto;

forming an anchor body having a first cavity and a second cavity in which the first cavity narrows in diameter from a first side to a second side of said anchor body, said second cavity narrowing in diameter from said second side to said first side of said anchor body, anchor also comprising a polymeric encapsulation in liquid-tight sealing relationship with an exterior surface of said anchor body, said polymeric encapsulation defining a first cap-receiving receptacle extending outwardly of said first cavity from said first side of said anchor body, said polymeric encapsulation defining a second cap-receiving receptacle extending outwardly of said second cavity from said second side of said anchor body;

affixing an end of a second tendon within said second cavity such that said second tendon extends outwardly from said first side of said anchor body;

positioning said dead-end anchorage and said anchor body within a form;

installing an end of said first tendon within said first cavity of said anchor body;

solidifying concrete around said dead-end anchorage and said anchor body within said form; and

tensioning said first tendon from said first side of said anchor body; and

affixing said first tendon in a tensioned state within said first cavity.

9. The method of claim 8, further comprising:

positioning a live end anchorage within another form, said live end anchorage having a cavity formed therein;

extending said second tendon through said another form so that an end of said second tendon is received within said cavity of said live end anchorage;

solidifying concrete around said second tendon and said live end anchorage within said another form;

tensioning an end of said second tendon at said live end anchorage; and

affixing said second tendon in a tensioned state within said cavity of said live end anchorage.

10. The method of claim 8, further comprising:

encapsulating said anchor body such that the end of said first tendon and the end of said second tendon are in liquid-tight sealing relationship within said anchor body.

11. The method of claim 8, said first tendon being affixed to said dead-end anchorage and said second tendon being affixed to said anchor body prior to said step of positioning within said form.