EP2241699A2 - Douille d'ancrage pour l'ancrage d'éléments d'armature prétendus - Google Patents

Douille d'ancrage pour l'ancrage d'éléments d'armature prétendus Download PDF

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Publication number
EP2241699A2
EP2241699A2 EP10003731A EP10003731A EP2241699A2 EP 2241699 A2 EP2241699 A2 EP 2241699A2 EP 10003731 A EP10003731 A EP 10003731A EP 10003731 A EP10003731 A EP 10003731A EP 2241699 A2 EP2241699 A2 EP 2241699A2
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EP
European Patent Office
Prior art keywords
sleeve according
concrete
anchoring
anchor sleeve
anchor
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP10003731A
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German (de)
English (en)
Other versions
EP2241699A3 (fr
Inventor
Thomas Friedrich
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
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Individual
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Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of EP2241699A2 publication Critical patent/EP2241699A2/fr
Publication of EP2241699A3 publication Critical patent/EP2241699A3/fr
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Classifications

    • 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

Definitions

  • the invention relates to an anchor sleeve for the anchoring of prestressed reinforcing elements according to the preamble of claim 1.
  • prefferably stressed reinforcing elements is understood to mean, in particular, rope strands.
  • rope strands can be designed either as a mono-strand or as a multiple strand.
  • prestressed reinforcing element is also understood to mean a smooth steel cable or a steel rod which has a smooth or corrugated surface.
  • anchor plates which were each frontally arranged on the component to be reinforced and between them a reinforcing element, for. B. wore a multiple steel strand.
  • the bias of a thin plate with z. B. a thickness of 8 cm can not be accomplished with the known anchor plates.
  • a preload is often required. In precast plants, this can usually be implemented with a pre-stress with a composite (prestressed bed prestressing). However, this requires a tension track.
  • a web production makes a flexible production impossible, because the elements lined up nearly all are made the same have to.
  • a flexible production in the precast plants is nowadays carried out with circulation systems on individual switch tables on which individual elements can be produced. Switching up to 16.0 m in length and a width of up to 4.50 m also make it possible to produce large-format elements. Especially for such dimensions is a bias useful and logical.
  • a fitted bed for circulating pallets is very expensive and, moreover, difficult to realize due to geometrical boundary conditions:
  • the invention is therefore based on the object with thin-walled wide-spanned components to create a very small-sized anchoring element for the prestressing of reinforcing elements.
  • the invention is characterized by the technical teaching of claim 1.
  • an anchor sleeve which consists essentially of three parts, namely a clamping device which is able to bias the strand against the anchor sleeve, also a Gussankerhülse in which the clamping device is arranged and further from a Vergussbeton emotions which receives the introduced from the tensioning wire on the tensioning device on the Gussankerhülse force and forwards in the axial direction and radial direction of the Vergussbeton Economics at least partially surrounding Umhüllungs emotions.
  • the field of application of the novel anchoring is thus the fixation of monostrand tendons.
  • the compact anchoring element allows use in thin panels, parapet supports or ribbed panels.
  • the novel anchoring sleeve is based on the anchoring of conventional tensioning strands in the tensioning bed.
  • the tension in the strand is transmitted to the concrete element via the bonding behavior between the surface of the strand and the surrounding concrete.
  • the novel designed anchor sleeve absorbs the clamping force of the strand in the smallest space within the cylinder cross-section and gives the absorbed force on the lateral surface of the surrounding concrete on.
  • the anchor sleeve is thus characterized by the two functions to absorb the tension, to distribute along the length of the sleeve and pass over the surface of the sleeve via composite behavior to the environment of the component to be biased.
  • the dimension of the anchor sleeve in cross section is designed to be as slim as possible in order to take into account the small space conditions in the components to be prestressed.
  • the absolute length of the sleeve makes it possible to influence the bonding behavior.
  • the anchor sleeve consists of several components.
  • a casting with the coordinated dimensions for the central implementation of the strand cross-section and for the wedge to be used forms the beginning of the anchor sleeve.
  • This concrete cylinder encloses the cast sleeve and forms the extension following the cast body.
  • the resulting cylinder is enclosed by a helical reinforcement.
  • the helical reinforcement absorbs the transverse forces in the cast body and surrounds the concrete cylinder so that it is able to absorb very high concrete compressive stresses.
  • the introduced in the cast body force is delivered to the part via the side ribs to the coil, and the rest is added to the head side of the adjoining concrete cylinder.
  • the spiral reinforcement increases the Recordable pressure capacity of the concrete significantly at the same time ductile deformation behavior.
  • the concentrated load transfer from the head of the casting sleeve to the concrete cylinder is taken up by the spiral-reinforced concrete cylinder and then released via the surface of the cylinder to the environment.
  • the helical reinforcement is used to lashing the concrete cylinder but also as a "toothed" surface for the targeted transfer of force from the anchor sleeve to the surrounding concrete of conventional grade.
  • Cast body and concrete cylinder centered a central opening for the implementation of the strand, which is anchored via a wedge anchorage in the cast body.
  • the entire anchor body is shown with the associated strand.
  • the slender anchor sleeve serves to be used in thin-walled components. These include thin wide-stretched prefabricated panel elements. But also plates with rising ribs, which are used with an upper shell as a sandwich cover. When arranging a plurality of anchor sleeves within a scheme, it is advisable to use a sheet as Abschalung, are provided in the holes for the anchor sleeves. Such a variety of anchor sleeves in be arranged according to a distance to a bundle. Two drawings with the applications described above illustrate the scope.
  • the invention uses several embodiments as a cladding body for the encapsulation of the Vergussbeton stresses.
  • a helix is used as the sheathing body, which preferably consists of a round steel.
  • the round steel of the helix is replaced by other profile shapes, such.
  • the wrapping body according to the invention is that the forces introduced by the cast anchor sleeve onto the casting concrete body do not lead to the destruction of the casting concrete body because, according to the invention, it is enveloped by a wrapping body arranged on the circumference.
  • a tube provided with a plurality of slots, which is preferably materially connected in one piece to a multiplicity of discs which attach to the tube sheath and which are directed radially outward.
  • This increase helps, in particular with the high concrete strength, also to ensure a similar elongation and thus to enable a ductile behavior.
  • this technique differs from the use of high strength concrete in conjunction with concrete dowels with the use of helical reinforcement.
  • FIG. 1 a plurality of anchoring sleeves 1 according to the invention is shown in its embedding state in a prestressed concrete 11, which is part of a concrete slab 2.
  • the concrete slab 2 is preferably formed as a precast slab and may have a width of 3 to 4 m and a length of up to 16 m. It is important that they can have a minimum thickness thanks to the small-sized anchor sleeves 1, z. B. a thickness of 8 cm.
  • a helix 7 is provided as a wrapping body 26.
  • FIG. 2 shows as a modified embodiment, the bias of tiled beams, which are formed as ribs 18, wherein these ribs 18 are in turn biased by a plurality of mutually parallel spaced armature sleeves 1.
  • Such ribs 18 can also be applied to a concrete slab 2 to be pretensioned.
  • FIGS. 3 and 4 show the more detailed construction of a preferred embodiment of the anchor sleeve. 1
  • a cast anchor sleeve 4 is arranged as a tensioning device 35, the exact structure of which can be taken from the drawing figures 10 and 11.
  • a clamping device 35 In the interior of the Gussankerhülse a clamping device 35 is arranged, which consists of a triple-segmented clamping wedge 6, so that these three clamping wedges in their Mittenausnaturalung record the exciting strand 9.
  • Vergussbeton Strength 5 is poured into the interior of a wrapping body 26 and thus partially surrounds the Gussankerhülse 4 and also laid in the interior strand 9th
  • Vergussbeton stresses 5 can be significantly increased if it is wrapped on its outer periphery with a wrapping body 26.
  • this wrapping body 26 is formed as a helix 7, which forms a plurality of spiral turns, which are embedded in semi-open helical grooves 13 on the periphery of Vergussbeton stressess 5.
  • the helix is first surrounded by a shell-shaped formwork, in which also the cast anchor sleeve 4 is included.
  • Vergussbeton Strength 5 From the rear end side of the thus prepared formwork is then filled with Vergussbeton redesign 5 so that it fills the entire interior of the coil 7 and also partially surrounds the Gussankerhülse 4.
  • the helix 7 then protrudes with its helical surface 14 away from the surface of the grouting concrete body 5 and is therefore higher than the outer circumference of the grouting concrete body.
  • Vergussbeton Strength 5 has undergone a reinforcement by the wrapping body 26, which has a grooved surface thanks to the surface side arranged helix 7.
  • Vergussbeton stresses 5 which sees through between the spiral bonds and on the other hand directly over the helical surfaces 14 itself.
  • a cladding tube 8 is cast into the rear end face of the grouting concrete body 5 and held in the material of the grouting concrete body 5, in the interior of which the stranded wire 9 is passed.
  • FIG. 5 This shows the FIG. 5 , where it can be seen that in the interior of the cladding tube 8, a grease layer 10 is arranged, which surrounds the strand 9 at the periphery.
  • the grease layer 10 is a corrosion protection for the strand 9 in this area and allows the strand in the clamping direction (axial direction) can be drawn into the clamping device 35.
  • the clamping device 35 shown here can not only consist of the cast anchor sleeve 4 with segmented clamping wedges 6. In another embodiment, it is provided that instead a spindle clamping device or an eccentric clamping device is provided. It is only important that with respect to the cast anchor sleeve 4 a sufficient tensile stress is applied in order to be able to initiate this tensile stress in a particularly favorable manner in the Vergussbetonelasticity 5.
  • FIG. 6 shows a modified embodiment of the formation of the cladding. 8
  • FIG. 7 shows the perspective view of the anchor sleeve 1 according to the invention, where it can be seen that in the interior of the Gussankerhülse 4, the three-segmented clamping wedges 6 are arranged to apply a corresponding clamping force on the strand 9. It is also shown that the outer circumference of the Vergussbeton stressess is surrounded over at least the substantial part of its length by the wrapping body 26, which is formed as a helix 7. The composite length 20 is about 25 to 35 cm.
  • FIG. 8 a modified embodiment of a wrapping body 27 is shown, which replaces the coil 7.
  • FIG. 9 shows the cast body 5 in its representation, as it is surrounded with the coil 7 as a wrapping body 26, wherein the cast anchor sleeve 4 is inserted in the front.
  • the cast anchor sleeve 4 is shown in more detail. It preferably consists of a Gussankerteil, z. B. of a material GGG40 with an upper and a lower peripheral flange, wherein the lower circumferential flange is formed as a collar 24, the bottom side of the force introduction surface 33 forms in the Vergussbeton Economics 5.
  • conical jacket 21 which defines an inside conical passage opening 25, in the interior of which also conical clamping wedges 6 are used.
  • a plurality of evenly distributed around the circumference arranged ribs 22 are arranged, which carry spiral grooves 23 for anchoring the coil 7.
  • both the helical groove 13 on the Vergussbeton redesign 5 and the helical groove 23 continue on the ribs 22, so that the coil 7 is also at least partially applied to the outer periphery of the Gussankerhülse 4 and there is anchored positively over the helical grooves 23 ,
  • the helix 7 also serves as a wrapping body 26 for enclosing the outer circumference of the cast anchor sleeve 4, in order also to impart improved strength of this cast anchor sleeve 4.
  • the two Gussumhüllungs stresses 26, 27 described herein are elastically radially expandable.
  • FIG. 12 the Vergussbeton redesign 5 is shown, and it can be seen that semi-open helical grooves 13 are present, in which the helical wire 31, 31 a, 31 b, 31 c of the helix 7 engages positively.
  • FIGS. 14 to 16 show different profile shapes of a helical wire.
  • the FIG. 14 shows here a round profiled helical wire 31 a, while the FIG. 15 a rectangular profiled helical wire 31 b and the FIG. 16 a ball-shaped helical wire 31 c shows.

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Reinforcement Elements For Buildings (AREA)
  • Piles And Underground Anchors (AREA)
EP10003731.6A 2009-04-07 2010-04-07 Douille d'ancrage pour l'ancrage d'éléments d'armature prétendus Withdrawn EP2241699A3 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102009016693A DE102009016693A1 (de) 2009-04-07 2009-04-07 Ankerhülse für die Verankerung von vorgespannten Bewehrungselementen

Publications (2)

Publication Number Publication Date
EP2241699A2 true EP2241699A2 (fr) 2010-10-20
EP2241699A3 EP2241699A3 (fr) 2016-02-17

Family

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EP10003731.6A Withdrawn EP2241699A3 (fr) 2009-04-07 2010-04-07 Douille d'ancrage pour l'ancrage d'éléments d'armature prétendus

Country Status (2)

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EP (1) EP2241699A3 (fr)
DE (1) DE102009016693A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11384548B2 (en) * 2019-04-12 2022-07-12 DPR Construction Sleeve for concrete slab penetration
RU201416U1 (ru) * 2020-07-20 2020-12-14 Открытое акционерное общество "Северсталь-метиз" Дюбель крепежного узла рельсового скрепления

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB894964A (en) * 1958-10-06 1962-04-26 Cufflin Holdings Ltd Improvements in or relating to prestressed concrete
US4719658A (en) * 1986-10-15 1988-01-19 Special Personal And Financial Planning And Referral Services, Inc. Hermetically sealed anchor construction for use in post tensioning tendons
DE10010564C1 (de) * 2000-03-03 2001-07-05 Johann Kollegger Verankerung für ein Zugelement aus Faserverbundwerkstoff
EP1525360A1 (fr) * 2002-06-26 2005-04-27 Sika Technology AG Dispositif et procede de renforcement de structures porteuses

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
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EP2241699A3 (fr) 2016-02-17
DE102009016693A1 (de) 2010-10-14

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