US3766609A - Anchoring body for key anchoring tension members - Google Patents

Anchoring body for key anchoring tension members Download PDF

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Publication number
US3766609A
US3766609A US00862774A US3766609DA US3766609A US 3766609 A US3766609 A US 3766609A US 00862774 A US00862774 A US 00862774A US 3766609D A US3766609D A US 3766609DA US 3766609 A US3766609 A US 3766609A
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United States
Prior art keywords
tendon
passage
anchoring
section
anchorage
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Expired - Lifetime
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US00862774A
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English (en)
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A Brandestini
H Siegwart
G Welbergen
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    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
    • E04C5/08—Members specially adapted to be used in prestressed constructions
    • E04C5/12—Anchoring devices
    • E04C5/122—Anchoring devices the tensile members are anchored by wedge-action
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T24/00—Buckles, buttons, clasps, etc.
    • Y10T24/39—Cord and rope holders

Definitions

  • the present invention relates to an anchorage body for anchoring tendons with wedges, such as strands, having a central passage for the tendon, at least one section ,of which passage widening conically from the inlet end to the outlet end in order to form a seat for wedges.
  • Such anchorage bodies for tendons do not fulfill all conditions as end anchorages inserted in the formwork or shuttering.
  • the present invention has for its object to provide an anchorage body which avoids the above-mentioned disadvantages.
  • the anchorage body according to the invention is characterised in that the first section of the passage, adjacent the inlet opening, tapers conically in order to form a seat fora centering and sealing-element to be inserted between tendon and anchorage body.
  • FIG. 1 shows a longitudinal section through an end anchorage by means of an anchorage body according to the invention.
  • FIG. la is a front view of the anchorage according to FIG. 1.
  • FIG. 2 shows a longitudinal section through the inlet sectionof a similar anchorage.
  • FIG. 3 shows a section through the inlet opening of a further embodiment of an anchorage
  • FIGS. 4 and 5 show longitudinal, sections through'two anchorages in finished state.
  • the tendon 1 (together with sheathing 1a) must be exactly centered at the inlet point A in the anchorage body, so that when the tendon. is later stressed, this centering remains true.
  • the anchorage body 2 must be fixable in the correct position, immovable with respect to the shuttering or formwork 7, so that, during concreting, the position of the anchorage body remains unaltered and said shuttering or formwork may easily be removed after the concrete has hardened.
  • conditions A and B are fulfilled (FIGS. 1-5), in that the anchorage body has on its rear side A an extension 2a internally provided with a conical recess 2b, which tapers in direction B.
  • a tubular resilient sealing body 4 is pressed in direction B into said recess.
  • a local constriction 2c of the conical recess 2b can prevent the penetration of the sealing body 4 into the wedge space 3a.
  • the inner diameter of the constriction 2c must however be considerably larger than the outer diameter of the tendon, since it must berpossible to push said tendon through this constriction without difficulty.
  • considerable thickenings are often formed at the ends thereof due to cutting by means of cutting torches, which thickenings must be guided through the constriction 20.
  • a centering of the tendon by means of this constriction must therefore be omitted, for practical reasons.
  • the sealing body 4 may be composed of rubber, plastic material or even metal; it may also be provided with a longitudinal slit at least at one place over at least a certain length.
  • the seal at point A can be additionally reinforced by the interposition of a sealing ring 5 (FIG. 1,2) made of soft material.
  • a ring 5a consisting for example of two parts may be placed on the constriction 2c as centering means (FIG. 3), before the seal 4 is pressed in.
  • the sealing body 4 may be of any desired length.
  • the tendon here consists of a strand with a lubricating and rust-protection coating and a paper sheathing la.
  • the tendon may however also pass through a rigid conduit (e.g. metal hose) 1b (FIG. 2), the space between tendon and sheathing being grouted after stressing.
  • the seal 4a between the conduit and the anchorage body 2, 2a may in this case be constructed as shown in FIG. 2, and it may also take over the function of a connecting piece, i.e., may be provided with another inlet opening 412 for the connection of the pipe for the grout.
  • the sealing body 4 may also be additionally glued to the conical inner face 2b.
  • This inner face may have a rough surface for better adhesion.
  • the anchorage body 2 is securely connected (for example by screwing) to a holding sleeve 6 (FIGS. 1-5).
  • the shuttering or formwork 7 is for its part securely connected to the holding sleeve 6 by being pressed against the shoulder 6b of the holding sleeve 6 by means of the nut 6d. It is important that the holding sleeve 6 is not only securely, but also tightly connected to the anchorage body 2. It is shown that when using a suitable plastic material, a multiple thread 6f is sufficient for the seal against grout penetrating in to the wedge space 3a. In order to increase the seal, the teeth of the thread or the surface 6b and 6g may be provided with thin fins which are pressed together when the holding sleeve 6 is screwed in and thereby improve the seal.
  • the holding sleeve 6 is removed, this being simplified by the cone 6a.
  • the finished anchorage is shown in FIG. 4.
  • FIG. 5 shows the same anchorage when it is not to be fixed against a shuttering or formwork, but is to lie inside the concrete structure as so-called fixed anchorage.
  • the wedges 3 are from the beginning firmly seated in the wedge space 3a and the tendon will thereby be anchoraged.
  • a cap 8 with spring 9 located inside the cap is screwed onto the anchorage body 2.
  • the outer surface or side of the conically tapering section may be provided with a thread 10.
  • An anchoring device for anchoring tendons with wedges comprising: an anchor body having a central passage therein for receiving said tendon, said passage having an inlet end, and outlet end, an outlet section of said passage widening conically toward said outlet end to form a seat for said wedges, and an inlet section of said passage widening conically toward said inlet end, the outer surface of said inlet section having a threaded portion; an annular shoulder between said inlet section and said outlet section; a centering and sealing element inserted between said tendon and the inner conical surface of said inlet section, whereby said centering and sealing element is seated on said inlet section and stopped against said annular shoulder to provide centering for said tendon and a seal between said tendon and said inlet section; and a holding sleeve for holding said anchor body to a fixed support and wherein said passage has a threaded widened part near said outlet end for removably securing said holding sleeve in said part of said passage.
US00862774A 1969-03-26 1969-10-01 Anchoring body for key anchoring tension members Expired - Lifetime US3766609A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH461169A CH482080A (de) 1969-03-26 1969-03-26 Ankerkörper für Spannglieder

Publications (1)

Publication Number Publication Date
US3766609A true US3766609A (en) 1973-10-23

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ID=4279323

Family Applications (1)

Application Number Title Priority Date Filing Date
US00862774A Expired - Lifetime US3766609A (en) 1969-03-26 1969-10-01 Anchoring body for key anchoring tension members

Country Status (15)

Country Link
US (1) US3766609A (de)
JP (1) JPS5421660B1 (de)
AT (1) AT314163B (de)
BE (1) BE747993A (de)
BR (1) BR7017793D0 (de)
CA (1) CA993633A (de)
CH (1) CH482080A (de)
DE (1) DE1958458C3 (de)
DK (1) DK135637B (de)
ES (1) ES377972A1 (de)
FR (1) FR2035896B1 (de)
GB (1) GB1294895A (de)
IL (1) IL34104A (de)
NL (1) NL164926C (de)
NO (1) NO127067B (de)

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4362421A (en) * 1980-03-17 1982-12-07 Kelly William F Anchor for use in the post-tensioning of prestressed concrete
US4773198A (en) * 1986-09-05 1988-09-27 Continental Concrete Structures, Inc. Post-tensioning anchorages for aggressive environments
US4799307A (en) * 1986-05-30 1989-01-24 Tech Research, Inc. Anchor apparatus for a tendon in prestressed concrete slab
US20060033003A1 (en) * 2004-08-12 2006-02-16 Lomont Molding, Inc. D.B.A. Paragon Products Pocket former
ES2275397A1 (es) * 2005-03-23 2007-06-01 Tecnicas Del Pretensado Y Servicios Auxiliares, S.L. Conjunto de anclaje de cables para estructuras postesadas o atirantadas.
US20070289239A1 (en) * 2006-06-20 2007-12-20 Davis Energy Group, Inc. Slab edge insulating form system and methods
WO2016014207A1 (en) * 2014-07-24 2016-01-28 Sorkin Felix L Cartridge for retaining a sheathing of a tendon within an anchor assembly
US9604416B2 (en) 2014-05-19 2017-03-28 Felix Sorkin Method of forming a post-tensioned concrete member utilizing a pocket former with keyway former
US9827721B2 (en) 2015-08-04 2017-11-28 Felix Sorkin Collapsible element pocket former
US9869091B2 (en) 2015-08-04 2018-01-16 Felix Sorkin Pocket cap for post-tensioned concrete member
US9896845B2 (en) 2015-08-04 2018-02-20 Felix Sorkin Spindle lock anchor for post tensioned concrete member
US9932738B2 (en) 2015-08-04 2018-04-03 Felix Sorkin Sheathing retention capsule
US20180313086A1 (en) * 2017-04-28 2018-11-01 Actuant Corporation Sealing cover for concrete anchor
US10145114B2 (en) 2015-08-04 2018-12-04 Felix Sorkin Sheathing lock end cap

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE8002044U1 (de) * 1980-01-26 1980-04-30 Dyckerhoff & Widmann Ag, 8000 Muenchen Keilverankerung fuer ein spannglied in einem betonbauteil
DE3224702C2 (de) * 1982-07-02 1986-01-16 Dyckerhoff & Widmann AG, 8000 München Vorrichtung zum Verankern und Koppeln eines Bündelspannglieds für Spannbeton
FR2544768B1 (fr) * 1983-04-19 1985-08-16 Freyssinet Int Stup Perfectionnements aux procedes et dispositifs pour graisser les extremites d'armatures de precontrainte
CH662595A5 (de) * 1983-08-22 1987-10-15 Losinger Ag Verankerung von freischwingenden zugelementen aus stahl eines dynamisch beanspruchten bauteiles.
DE3438865C1 (de) * 1984-10-24 1986-04-03 Dyckerhoff & Widmann AG, 8000 München Keilverankerung fuer die Anspannseite eines Einzelspannglieds fuer ein Spannbetonbauteil
US4674255A (en) * 1985-05-20 1987-06-23 Snap Seal Sealing plug for a cone-type rod opening in concrete walls and the like
US4616458A (en) * 1985-07-01 1986-10-14 Vsl Corporation Protective apparatus for tendons in tendon tensioning anchor assemblies
US4918887A (en) * 1987-10-14 1990-04-24 Vsl Corporation Protective tendon tensioning anchor assemblies
DE4015093A1 (de) * 1990-05-11 1991-11-14 Emil Bonato Zwischenanker fuer schleuderbetonformen zur herstellung von rohrfoermigen spannbetonkoerpern
DE9415690U1 (de) * 1994-09-28 1994-11-24 Doellen Heinz Von Spanneinrichtung
JP6366237B2 (ja) * 2013-08-09 2018-08-01 三菱電機株式会社 冷蔵庫
EP3375949B1 (de) * 2015-08-04 2021-04-14 Felix L. Sorkin System für nachgespanntes betonelement
CN105128154B (zh) * 2015-09-17 2017-01-18 崔景宽 一种螺纹连接的后锚固施工方法及加工设备

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1710416A (en) * 1927-04-16 1929-04-23 Robert A Goeller Connecter
US1817774A (en) * 1928-05-02 1931-08-04 Harry E Sipe Tubular coupling and method of constructing the same
US2406235A (en) * 1944-02-25 1946-08-20 Locke Insulator Corp Porcelain pipe
US2823248A (en) * 1953-09-29 1958-02-11 Amphenol Electronics Corp Self-sealing cable clamp
US3137971A (en) * 1959-07-15 1964-06-23 Cable Covers Ltd Stressed concrete structures
CA713750A (en) * 1965-07-20 Rhodes Brian Anchor grips, couplings or connectors for tensioning wires rods, strands and the like
US3326791A (en) * 1962-05-26 1967-06-20 Contre La Corrosion S E C C O Method and structure for connecting electrodes to feed cables
US3384704A (en) * 1965-07-26 1968-05-21 Amp Inc Connector for composite cables
US3449876A (en) * 1968-02-21 1969-06-17 George H Howlett Tendon anchorage

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB704094A (en) * 1951-05-15 1954-02-17 British Transp Commission Improvements relating to anchorages for prestressing elements used in concrete
US3399434A (en) * 1965-09-27 1968-09-03 William F. Kelly Anchors for stressed cables

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA713750A (en) * 1965-07-20 Rhodes Brian Anchor grips, couplings or connectors for tensioning wires rods, strands and the like
US1710416A (en) * 1927-04-16 1929-04-23 Robert A Goeller Connecter
US1817774A (en) * 1928-05-02 1931-08-04 Harry E Sipe Tubular coupling and method of constructing the same
US2406235A (en) * 1944-02-25 1946-08-20 Locke Insulator Corp Porcelain pipe
US2823248A (en) * 1953-09-29 1958-02-11 Amphenol Electronics Corp Self-sealing cable clamp
US3137971A (en) * 1959-07-15 1964-06-23 Cable Covers Ltd Stressed concrete structures
US3326791A (en) * 1962-05-26 1967-06-20 Contre La Corrosion S E C C O Method and structure for connecting electrodes to feed cables
US3384704A (en) * 1965-07-26 1968-05-21 Amp Inc Connector for composite cables
US3449876A (en) * 1968-02-21 1969-06-17 George H Howlett Tendon anchorage

Cited By (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4362421A (en) * 1980-03-17 1982-12-07 Kelly William F Anchor for use in the post-tensioning of prestressed concrete
US4799307A (en) * 1986-05-30 1989-01-24 Tech Research, Inc. Anchor apparatus for a tendon in prestressed concrete slab
US4773198A (en) * 1986-09-05 1988-09-27 Continental Concrete Structures, Inc. Post-tensioning anchorages for aggressive environments
US20060033003A1 (en) * 2004-08-12 2006-02-16 Lomont Molding, Inc. D.B.A. Paragon Products Pocket former
US7216842B2 (en) * 2004-08-12 2007-05-15 Lomont Molding, Inc. Pocket former
ES2275397A1 (es) * 2005-03-23 2007-06-01 Tecnicas Del Pretensado Y Servicios Auxiliares, S.L. Conjunto de anclaje de cables para estructuras postesadas o atirantadas.
US20070289239A1 (en) * 2006-06-20 2007-12-20 Davis Energy Group, Inc. Slab edge insulating form system and methods
US7596915B2 (en) * 2006-06-20 2009-10-06 Davis Energy Group, Inc. Slab edge insulating form system and methods
US20170152660A1 (en) * 2014-05-19 2017-06-01 Felix Sorkin Modified Pocket Former
US9604416B2 (en) 2014-05-19 2017-03-28 Felix Sorkin Method of forming a post-tensioned concrete member utilizing a pocket former with keyway former
US10072429B2 (en) * 2014-05-19 2018-09-11 Felix Sorkin Modified pocket former
WO2016014207A1 (en) * 2014-07-24 2016-01-28 Sorkin Felix L Cartridge for retaining a sheathing of a tendon within an anchor assembly
US9869091B2 (en) 2015-08-04 2018-01-16 Felix Sorkin Pocket cap for post-tensioned concrete member
US9896845B2 (en) 2015-08-04 2018-02-20 Felix Sorkin Spindle lock anchor for post tensioned concrete member
US9932738B2 (en) 2015-08-04 2018-04-03 Felix Sorkin Sheathing retention capsule
US9827721B2 (en) 2015-08-04 2017-11-28 Felix Sorkin Collapsible element pocket former
US10071530B2 (en) * 2015-08-04 2018-09-11 Felix Sorkin Collapsible element pocket former
US10145114B2 (en) 2015-08-04 2018-12-04 Felix Sorkin Sheathing lock end cap
US20190024187A1 (en) * 2015-08-04 2019-01-24 Felix Sorkin Collapsible element pocket former
US10343354B2 (en) * 2015-08-04 2019-07-09 Felix Sorkin Collapsible element pocket former
US10500799B2 (en) * 2015-08-04 2019-12-10 Felix Sorkin Collapsible element pocket former
US20180313086A1 (en) * 2017-04-28 2018-11-01 Actuant Corporation Sealing cover for concrete anchor
US10508447B2 (en) * 2017-04-28 2019-12-17 Precision-Hayes International Inc. Sealing cover for concrete anchor

Also Published As

Publication number Publication date
BE747993A (fr) 1970-08-31
JPS5421660B1 (de) 1979-08-01
DK135637B (da) 1977-05-31
NL7004097A (de) 1970-09-29
DE1958458A1 (de) 1970-10-01
NL164926C (nl) 1981-02-16
DE1958458B2 (de) 1979-05-17
GB1294895A (de) 1972-11-01
IL34104A0 (en) 1970-05-21
FR2035896A1 (de) 1970-12-24
CH482080A (de) 1969-11-30
DK135637C (de) 1977-10-31
CA993633A (en) 1976-07-27
ES377972A1 (es) 1972-06-16
DE1958458C3 (de) 1980-10-09
NO127067B (de) 1973-04-30
BR7017793D0 (pt) 1973-02-01
IL34104A (en) 1973-10-25
NL164926B (nl) 1980-09-15
FR2035896B1 (de) 1974-03-01
AT314163B (de) 1974-03-25

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