EP1764448B1 - Dispositifs de connection à noyer dans le béton - Google Patents

Dispositifs de connection à noyer dans le béton Download PDF

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Publication number
EP1764448B1
EP1764448B1 EP06120258.6A EP06120258A EP1764448B1 EP 1764448 B1 EP1764448 B1 EP 1764448B1 EP 06120258 A EP06120258 A EP 06120258A EP 1764448 B1 EP1764448 B1 EP 1764448B1
Authority
EP
European Patent Office
Prior art keywords
anchorage
embedment
strips
anchors
elongate
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.)
Not-in-force
Application number
EP06120258.6A
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German (de)
English (en)
Other versions
EP1764448A2 (fr
EP1764448A3 (fr
Inventor
Philip Frank French
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.)
Laing Orourke PLC
Original Assignee
Laing Orourke PLC
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Publication date
Application filed by Laing Orourke PLC filed Critical Laing Orourke PLC
Publication of EP1764448A2 publication Critical patent/EP1764448A2/fr
Publication of EP1764448A3 publication Critical patent/EP1764448A3/fr
Application granted granted Critical
Publication of EP1764448B1 publication Critical patent/EP1764448B1/fr
Not-in-force legal-status Critical Current
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Classifications

    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/38—Connections for building structures in general
    • E04B1/41—Connecting devices specially adapted for embedding in concrete or masonry
    • E04B1/4107—Longitudinal elements having an open profile, with the opening parallel to the concrete or masonry surface, i.e. anchoring rails
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
    • E04C5/16—Auxiliary parts for reinforcements, e.g. connectors, spacers, stirrups

Definitions

  • the present invention relates to fixing embedments in concrete and, more particularly, to an embedment in combination with an anchorage to facilitate the fixing of the embedment in reinforced concrete.
  • GB 1281673 (ILLINOIS TOOL WORKS INC) 04/07/1972 describes an insert to be made from sheet steel such as AISI 1010. The preferred thickness is not given.
  • the insert is a generally channel shaped element having two leg portions of differing lengths. The insert is held within the body of the concrete by angularly offset foot portions at the end of each leg portion.
  • CA 2179227 (DI BENEDETTO, FRANK) 18/12/1997 describes a metal anchor bracket intended to be embedded into the surface of a semi-solid concrete wall.
  • Di Benedetto provides a vertically extending leg to anchor the bracket in the concrete.
  • the vertically extending leg has apertures, which are said to assist in allowing the leg to move through the partially set concrete.
  • Di Benedetto suggests that this type of anchor is superior to inserts that are nailed to the formwork before pouring of the concrete such as that described by Illinois Tool Works.
  • an anchorage for an embedment is also described in EP 1164227 A (ZAMBELLI, SERGIO ET AL) 15/06/2000
  • the embedment is an inverted channel anchored by means of stirrups that engage with the embedment by passing through holes in the embedment.
  • individual stirrups are welded to the rear of the embedment.
  • the anchors When embedments are used with reinforced concrete, it is taught that the anchors must always be positioned within the reinforcement cage, not in the concrete cover. In order to achieve this, the anchors must be positioned so that they do not conflict with the positions of the rebars within the cage. This is particularly difficult when using reinforcement arrangements such as ROLLMAT® supplied by Express Reinforcements Ltd or BAMTEC® supplied by BAM AG. These are prefabricated semi-rigid rebar assemblies and can be rolled out just like a carpet onto the formwork on site. Since the embedments must be fixed in specified places in the formwork, there is a high probability of conflict between an anchor and the rebars within the carpet. If the carpet has been designed for use with the intended embedments, it is still necessary to direct the site staff to position the carpet accurately on the formwork. This positioning is only necessary to avoid conflict with embedment anchors.
  • anchors such as fingers of thin (for example 1-2mm possibly up to 5mm thick) metal plate, spikes of small diameter wire -typically 3 to 5 mm - or strips of thin metal sheet in place of studs or other rigid anchorages including bolts and lengths of welded reinforcement.
  • These weaker anchors are formed as part of a continuous element and are individually or locally displaceable by any rebar into which they come into conflict. The anchors can be bent and/or buckled to displace them.
  • the present invention provides an elongate embedment in combination with an anchorage, the embedment comprising an elongate channel to which other elements can be fixed, the anchorage comprising anchors adapted to extend into a concrete mass into which the embedment is to be embedded, the anchorage being an elongate continuous element which extends along the elongate channel and which defines a plurality of anchors, wherein the anchorage comprises a plurality of thin wires or strips, the thin wires being of sufficiently small diameter or the strips being sufficiently thin that said thin wires or said strips are displaceable when they come into conflict with a rebar in the concrete mass, characterised in that the anchorage is welded to the elongate channel and in that the plurality of thin wires or strips are connected to a base strip or mat of the continuous element.
  • the present invention provides an elongate embedment in combination with an anchorage, the embedment comprising an elongate channel to which other elements can be fixed, the anchorage comprising anchors adapted to extend into a concrete mass into which the embedment is to be embedded, the anchorage being an elongate continuous element which extends along the elongate channel and which defines a plurality of anchors, wherein the anchors comprise two wings each defining a series of spaced finger strips that act as anchors, said strips being sufficiently flexible that they are displaceable when they come into conflict with a rebar in the concrete mass, characterised in that the anchorage is welded to the elongate channel and in that the strips of one wing are positioned opposite gaps between strips in the opposite wing.
  • a displaceable anchor avoids the issues arising when there is interference between reinforcement and anchor studs on the embedments. By avoiding such conflicts, productivity is increased on site.
  • the anchorage as a whole is effective. Although some of the multiple anchors are taken out by conflicts with rebars, the remainder are sufficient to hold the embedment in position.
  • Figure 1 is a perspective view of a first embodiment of a thin sheet anchorage
  • Figure 2 is a top plan view of the embodiment of Figure 1 ;
  • Figure 3 is a front view of the embodiment of Figure 1 ;
  • Figure 4 is a side view of the embodiment of Figure 1 ;
  • Figure 5 is a perspective view of a channel to which a helical anchorage (not in accordance with the claimed invention) is fitted;
  • Figure 6 is a perspective view of a channel with multiple wire anchors
  • Figure 7 is a perspective view of a channel with an alternative design of wire anchors
  • Figure 8 is a perspective view of a channel with a sheet anchor.
  • Figure 9 shows an end elevation of the channel of Figure 8 in which some of the anchor strips have been displaced.
  • An elongate channel 2 is provided with anchor means 4 which are two continuous thin plate anchorage elements 8 that together provide an anchorage 6 adapted to extend into a concrete mass into which the embedment 2 is to be embedded.
  • This concrete mass contains rebars for reinforcement.
  • the anchorage is formed from a 1.5mm sheet of metal such as galvanized steel plate and shaped to create a flat base strip 10 with elongated edges 12. This base strip can be welded to a rear face 14 of the channel 2. Two serrated wings 16, 16' project away from the strip along each elongate edge 12 in order to form the anchorage elements. These anchorage elements project into the reinforcement cage defined by the rebars.
  • the wings 16 are angled outwardly at 105° to the plane of the base strip 10. Each wing 16 defines a plurality of spaced finger strips 18 with gaps 20 between them. The strips 18 along one wing 16 are positioned opposite the gaps 20 in the opposite wing 16'. Although all the fingers in a wing are shown as extending at the same angle, the strips could be fanned out so that adjacent strips are at different angles relative to the rear surface 14 of the embedment.
  • Each finger strip 18 has an oval opening 22 extending from near a root at which it joins the base strip 10 to close to its tip 24.
  • a circular opening 26 is stamped out above the oval opening 22 close to the tip 24.
  • the finger strips 18 are bent more steeply away from the vertical at an intermediate position so that whereas an outer face of a lower part 28 of the strip 18 is at an angle of 75° to the horizontal and an upper part 30 of the strip is inclined at an angle of 52° to the horizontal.
  • the finger strips 18 are, in this embodiment, 46mm long with a bend line 32 between the upper and lower parts 28,30 25 mm from the tip 24.
  • the finger strips 18 are designed to be displaceable and/or broken off when they come into conflict with the rebar in the concrete mass.
  • the strips 18 need to have sufficient rigidity to remain intact during storage and transport of the anchorage.
  • the strips 18 need to be sufficiently flexible to give way when they encounter a rebar.
  • the bend line 32 facilitates the movement of the finger out of the way when it comes into conflict with a rebar.
  • the presence of the openings 22, 26 also serves to make the finger strips 18 less stable and flexible when confronted by a rebar.
  • the channel 2 which is to be embedded in concrete, has a helical coil 34 welded along its length to serve as an anchorage 6.
  • the coil 34 is made of a relatively thin gauge wire -for example 3 mm wire- and is welded in position to a rear face 14 of the channel by means of a welding arm (not shown) that passes through the centre of the coil 34 along a central axis indicated by line 40 in order to create spot welds 42 at 20mm spacing between each individual loop of the anchorage and the rear face 14 of the channel 2.
  • a welding arm (not shown) that passes through the centre of the coil 34 along a central axis indicated by line 40 in order to create spot welds 42 at 20mm spacing between each individual loop of the anchorage and the rear face 14 of the channel 2.
  • the resulting anchorage 6 will therefore consist of a plurality of thin wires 44 arranged in two rows each wire extending generally upwardly from the rear face 14 of the channel 2.
  • each individual loop is substantially circular
  • the coil could be square or rectangular in profile.
  • This anchorage configuration is particularly advantageous as it is easy to manufacture as pulling out of the coil effectively sets the spacing of the loops.
  • any of the wires 44 that come into conflict with a rebar will be displaced or broken off. Where the anchor wires 44 are bent out of position they will still contribute to the anchorage effect.
  • the strength and integrity of the anchorage 6 as a whole is secured by the number of individual anchors 44 rather than their individual strength.
  • Halfen teaches anchor spacing of 200 - 250 mm for long channel embedments.
  • the spacing of anchors 44 is reduced to 20mm although with a thicker wire coil, say 5 mm, the coil 34 could be stretched out so that individual loops were welded at 30mm spacing to the rear face 14 of the embedment 2.
  • a spacing of less than 100mm is suggested as suitable even for small embedments. The skilled man will appreciate that the exact design parameters can be determined in dependence on the load to be carried by the embedment, concrete aggregate size and other relevant factors by appropriate tests and calculations.
  • anchor wires 44 are paired, vertical spikes.
  • the spikes 44 are assembled to a mat to create a continuous element and facilitate welding to the rear face 38 of the channel 2.
  • a double row of spikes is preferable to a single row in case of conflict with a rebar which runs parallel to the embedment 2.
  • wire spikes 44 are illustrated as being straight, it is preferable for them to be formed with a small deformation along their length as shown at 46 in the callout in Figure 6 .
  • the presence of the deformation 46 improves the bond between the wire and the surrounding concrete. It also facilitates the movement of the spike out of the way when it comes into conflict with a rebar. Because part of the spike is offset, a bending moment is created when the spike is subjected to an axial load and this helps to start the bending and buckling process to displace the spike.
  • the spikes 44 are each angled outwardly away from the embedment 2.
  • the wire anchors 44 are replaced by an anchorage 6 fabricated from a thin sheet 50 which has been cut into strips 52 to form a comb or brush like structure along each side.
  • the cuts permit each strip 52a to be positioned during manufacture with a displacement relative to the adjacent strips 52b. Therefore, adjacent strips extend at different angles relative to a rear surface 14 of the embedment 2.
  • This arrangement permits the flow of concrete around each strip 52.
  • the sheet 50 is welded along an intermediate line or lines 54 to the rear face 14 of the embedment so that the strips of the comb or brush like structure project away from the embedment 2 into the main body of the concrete.
  • the fanning arrangement of this embodiment is advantageous as it produces an effective variation in height of the anchors so that the initial conflicts between the wire anchors and the reinforcement do not all occur simultaneously.
  • the fingers 18 or wire spikes 44 of the earlier embodiments could be cut to differing lengths to ensure such a progressive loading.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Reinforcement Elements For Buildings (AREA)
  • Tents Or Canopies (AREA)

Claims (4)

  1. Encastrement allongé (2) en combinaison avec un ancrage (6), l'encastrement comprenant un canal allongé auquel d'autres éléments peuvent être fixés, l'ancrage comprenant des pièces d'ancrage (4) adaptées pour s'étendre dans une masse de béton dans laquelle l'encastrement (2) doit être encastré, l'ancrage étant un élément continu allongé qui s'étend le long du canal allongé et qui définit une pluralité de pièces d'ancrage (44, 52), où l'ancrage comprend une pluralité de fils fins (44) ou de bandes (52), les fils fins (44) étant d'un diamètre assez petit ou les bandes (52) étant assez fines pour que lesdits fils fins (44) ou lesdites bandes (52) puissent être déplacés lorsqu'ils entrent en conflit avec une barre d'armature dans la masse de béton, caractérisé en ce que l'ancrage (6) est soudé au canal allongé et en ce que la pluralité de fils fins (44) ou de bandes (52) sont raccordés à une bande ou un mat de base de l'élément continu.
  2. Encastrement allongé (2) en combinaison avec un ancrage (6), la combinaison étant telle que revendiquée dans la revendication 1, dans lequel les fils (44) ou les bandes (52) sont agencés en au moins deux rangées sur la longueur de l'élément.
  3. Encastrement allongé (2) en combinaison avec un ancrage (6), l'encastrement comprenant un canal allongé auquel d'autres éléments peuvent être fixés, l'ancrage comprenant des pièces d'ancrage (4) adaptées pour s'étendre dans une masse de béton dans laquelle l'encastrement (2) doit être encastré, l'ancrage étant un élément continu allongé qui s'étend le long du canal allongé et qui définit une pluralité de pièces d'ancrage (18), dans lequel les pièces d'ancrage comprennent deux ailes (16, 16') définissant chacune une série de bandes à doigt espacées (18) qui servent de pièce d'ancrage, lesdites bandes étant assez flexibles pour pouvoir être déplacées lorsqu'elles entrent en conflit avec une barre d'armature dans la masse de béton, caractérisé en ce que l'ancrage (6) est soudé au canal allongé et en ce que les bandes d'une aile (16) sont positionnées en face d'espacements (20) entre des bandes dans l'aile opposée (16').
  4. Encastrement allongé (2) en combinaison avec un ancrage (6), la combinaison étant telle que revendiquée dans la revendication 1 ou 3, dans lequel des fils ou bandes adjacents (18, 44, 52) s'étendent à des angles différents par rapport à une surface (14) d'un encastrement (2).
EP06120258.6A 2005-09-16 2006-09-07 Dispositifs de connection à noyer dans le béton Not-in-force EP1764448B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB0518954A GB2430206B (en) 2005-09-16 2005-09-16 Fixing embedments in reinforced concrete

Publications (3)

Publication Number Publication Date
EP1764448A2 EP1764448A2 (fr) 2007-03-21
EP1764448A3 EP1764448A3 (fr) 2008-08-06
EP1764448B1 true EP1764448B1 (fr) 2013-08-28

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ID=35248919

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06120258.6A Not-in-force EP1764448B1 (fr) 2005-09-16 2006-09-07 Dispositifs de connection à noyer dans le béton

Country Status (2)

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EP (1) EP1764448B1 (fr)
GB (1) GB2430206B (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101677210B1 (ko) * 2016-06-27 2016-11-18 주식회사 옥타곤엔지니어링 콘크리트 구조물에 매입되는 조립형 채널
EP3921490A1 (fr) * 2019-02-06 2021-12-15 Pino Albanese Système de montage pour le montage d'un dispositif d'ancrage et procédé pour le montage d'un dispositif d'ancrage sur des constructions partiellement bâties en béton

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100978960B1 (ko) * 2007-10-29 2010-08-30 현대엔지니어링 주식회사 2차부재 고정용 강판절곡 매입기구
US9097004B2 (en) 2011-08-10 2015-08-04 Pak Sum Yau Combined pre-embedded anchoring slot system
DE102015008226A1 (de) * 2015-06-29 2016-12-29 JORDAHL GmbH Stahlbetonbauelement mit netzförmigem Armierungselement
DE102020103568A1 (de) 2020-02-12 2021-08-12 Wilhelm Modersohn Gmbh & Co Kg Ankerschiene und Verfahren zur Herstellung einer Ankerschiene
CN112317660A (zh) * 2020-06-19 2021-02-05 中国建筑土木建设有限公司 一种灌注桩钢筋笼半自动制作方法
DE102020120750A1 (de) 2020-08-06 2022-02-10 Wilhelm Modersohn Gmbh & Co Kg Ankerschiene und Verfahren zur Herstellung einer Ankerschiene
DE102020126901A1 (de) 2020-10-13 2022-04-14 Wilhelm Modersohn Gmbh & Co Kg Ankerschiene
CN112459262B (zh) * 2020-11-30 2022-05-10 中国一冶集团有限公司 一种新型哈芬槽及其施工方法
DE102022107996A1 (de) 2022-04-04 2023-10-05 Henning Hager Ankereinheit, Bauwerkseinrichtung und Verfahren zum Herstellen einer Bauwerkseinrichtung

Citations (2)

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Publication number Priority date Publication date Assignee Title
GB814501A (en) * 1957-03-18 1959-06-03 Rene Frantz Improvements in or relating to methods of and means for manufacturing structural members such as girders or reinforcements for concrete
EP0132254A2 (fr) * 1983-07-15 1985-01-23 BEST - Baueisen- und Stahl-Bearbeitungsgesellschaft m.b.H. Cage d'armature pour le renforcement spatial de structures en béton armé

Family Cites Families (11)

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Publication number Priority date Publication date Assignee Title
GB191329749A (en) 1913-12-24 1915-07-22 Anders Jordahl Means for Securing and Supporting Brackets, Plummer-blocks,or other Fittings on Ceilings, Beams, Walls or the like constructed of Reinforced Concrete.
DE359153C (de) * 1916-02-19 1922-09-21 Emil Buhlmann Zum Aufhaengen von Lasten dienendes Trageisen fuer Betondecken
DE513240C (de) * 1927-03-29 1930-11-24 Claus Meyn Geschlitzte Ankerschiene fuer Eisenbetonbauten
US3574984A (en) 1969-02-10 1971-04-13 Illinois Tool Works Corner insert device
US4073114A (en) * 1977-04-01 1978-02-14 Unistrut Corporation Insert assembly for use in pre-stressed concrete structures
DE2806261C2 (de) * 1978-02-15 1986-08-14 Pfeifer Seil- Und Hebetechnik Gmbh & Co, 8940 Memmingen Vorrichtung zum Transport von Betonfertigteilen
DE59509067D1 (de) 1995-07-26 2001-04-05 Halfen Gmbh & Co Kg Ankerschiene für die Bautechnik
CA2179227C (fr) 1996-06-17 2001-02-20 Frank Di Benedetto Dispositif d'ancrage en acier pour fixations sur murs en beton
JPH10122215A (ja) * 1996-10-14 1998-05-12 Wakai Sangyo Kk 気泡コンクリート用アンカー
DE19725882A1 (de) * 1997-06-18 1998-12-24 Modersohn Gmbh & Co Kg Wilh Ankerschiene
EP1164227A1 (fr) * 2000-06-15 2001-12-19 Sergio Zambelli Dispositif d'ancrage pour composants en béton

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB814501A (en) * 1957-03-18 1959-06-03 Rene Frantz Improvements in or relating to methods of and means for manufacturing structural members such as girders or reinforcements for concrete
EP0132254A2 (fr) * 1983-07-15 1985-01-23 BEST - Baueisen- und Stahl-Bearbeitungsgesellschaft m.b.H. Cage d'armature pour le renforcement spatial de structures en béton armé

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101677210B1 (ko) * 2016-06-27 2016-11-18 주식회사 옥타곤엔지니어링 콘크리트 구조물에 매입되는 조립형 채널
EP3921490A1 (fr) * 2019-02-06 2021-12-15 Pino Albanese Système de montage pour le montage d'un dispositif d'ancrage et procédé pour le montage d'un dispositif d'ancrage sur des constructions partiellement bâties en béton

Also Published As

Publication number Publication date
GB2430206A (en) 2007-03-21
EP1764448A2 (fr) 2007-03-21
EP1764448A3 (fr) 2008-08-06
GB2430206B (en) 2007-09-12
GB0518954D0 (en) 2005-10-26

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