EP0290831B1 - Bewehrungslagen-Abstützvorrichtung - Google Patents

Bewehrungslagen-Abstützvorrichtung Download PDF

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Publication number
EP0290831B1
EP0290831B1 EP88106357A EP88106357A EP0290831B1 EP 0290831 B1 EP0290831 B1 EP 0290831B1 EP 88106357 A EP88106357 A EP 88106357A EP 88106357 A EP88106357 A EP 88106357A EP 0290831 B1 EP0290831 B1 EP 0290831B1
Authority
EP
European Patent Office
Prior art keywords
concrete
reinforcement
insert
imbedded
socket
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.)
Expired - Lifetime
Application number
EP88106357A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0290831A2 (de
EP0290831A3 (en
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.)
Sell Rudolf Dr-Ing
Original Assignee
Sell Rudolf Dr-Ing
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Sell Rudolf Dr-Ing filed Critical Sell Rudolf Dr-Ing
Priority to AT88106357T priority Critical patent/ATE69284T1/de
Publication of EP0290831A2 publication Critical patent/EP0290831A2/de
Publication of EP0290831A3 publication Critical patent/EP0290831A3/de
Application granted granted Critical
Publication of EP0290831B1 publication Critical patent/EP0290831B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • E04C5/16—Auxiliary parts for reinforcements, e.g. connectors, spacers, stirrups
    • E04C5/18—Spacers of metal or substantially of metal

Definitions

  • the invention relates to an insert to be concreted in to ensure a given concrete cover for more than one reinforcement layer of reinforced concrete components with the features mentioned in the preamble.
  • Inserts of the specified type to be concreted in consist of prefabricated reinforcement cages which are inserted into the formwork to ensure that the formwork is supported only for the upper reinforcement layer. It is disadvantageous that the base points of the baskets, which rest on the formwork in a relatively narrow division in an alignment, also determine the course of the crack in the concrete. These baskets are made in lengths of up to 2 m as supports from very thin round concrete bars and have a special shape due to their shape already the features of a construction made of reinforcing steel with the exclusive task of keeping the upper reinforcement layer at the required height.
  • such reinforcement support structures represent a very complex solution, especially since their use is limited to the relatively short time it takes for the concrete to be poured in and hardened.
  • the free ends standing on the formwork are to be protected from rust by a coat of paint, or, as provided in OS 25 45 422, covered with a protective cap made of plastic. Since the brackets have a relatively small cross-section, their free ends are pressed into the formwork. After stripping, these ends protrude down over the concrete underside.
  • the invention has therefore set itself the task of forming a reinforcement support so that it excludes the disadvantages of known systems and can also be used as a constructive means in the sense of reinforcement or anchoring, i.e. reinforcement of the reinforced concrete component, and thereby to improve the quality and Economics, but also to the more rational installation of reinforcements in more than one reinforcement layer and more rational establishment of a connection.
  • U-shaped brackets are welded together by means of longitudinal rods to form a unit, which have thickenings in the form of sleeves on the free bracket legs, that is, an end anchorage of the bracket that create transverse force - Increases the load-bearing capacity of the reinforced concrete component.
  • These are equipped with retaining elements which are mounted in a distance from the formwork, so that they ü the lower reinforcement sheet with a concrete cover and secure, and for the upper reinforcement layer by means of the bracket webs or the longitudinal bars a concrete cover ü o ensure by the height of the bracket on the target position of the upper reinforcement layer is coordinated according to the reinforcement concept.
  • the temple ends stand vertically on the formwork.
  • a screw which engages an intermediate component (7) or other component directly against the concrete component can engage in the temple ends in the form of internally threaded sleeves closed with a stopper (6) in the form of internally threaded sleeves.
  • the component equipped with the inserts according to the invention is now "screwable".
  • an embodiment of the insert to be concreted is placed under protection, in which the spread (s) of the stirrup is selected such that the stirrup ends laterally touch the longitudinal reinforcement of the lower reinforcement mat and are held in such a way that the elastic restoring force of the stirrup ends attached to the longitudinal reinforcement.
  • the bracket 4 provided at the bracket end in the example shown designed as an internally toothed serrated lock washer or claw locking washer, ensures that the main reinforcement of the lower reinforcement layer L u receives the intended concrete cover.
  • the spread s of the stirrup legs is selected such that it is in agreement with the Y division of standardized mesh reinforcements.
  • the stirrup spacing a can also be advantageously matched to the X division of prefabricated mesh reinforcements. In this way it is achieved that the insert shown in FIGS. 2 and 3 can be inserted with a precise fit into the mesh opening of the mesh reinforcement even before the mesh is laid in the formwork.
  • the rational laying of reinforcement can also be achieved with a high reinforcement content, when reinforcing bars with larger diameters have to be installed by installing mesh reinforcement first, as a kind of distribution reinforcement.
  • the insert can of course also be composed of several brackets. It is then no longer possible to push the insert through the mesh of the center of the reinforcement. In individual cases it may be advantageous to integrate several brackets into one unit.
  • the insert according to the invention provides internally threaded sleeves made of stainless steel, which offer optimum protection against corrosion.
  • designs with an internally threaded sleeve with hot-dip galvanized or electro-galvanized surface are also possible for reinforced concrete structures that only need to provide reduced protection against corrosion.
  • the invention provides i.a. also the use of rebar for the manufacture of the bracket 2 before.
  • the non-positive connection to the sleeve by means of positive locking can advantageously be made by pressing in addition to other methods, such as. B. screws if the rods have a thread rib.
  • a non-positive connection of the ironing rod to the sleeve is also possible by friction or pressure welding.
  • Fig. 4 shows the bracket bracket firmly welded to the sleeve surface.
  • a displaceable bracket with internally toothed serrated lock washers is shown in Figs. 1 to 3. Versions with such adjustable holding elements have the advantage that the support structure can be used variably, both for constructions with small and large Concrete cover.
  • a diameter-dependent coverage u u is automatically maintained, as required in the relevant German standards, if the opening angle of the support fork is 40 degrees.
  • the console bracket can be in the plane of the bracket, as well as vertically be arranged at this level, consist of one piece, be welded one or two legs in one direction or two legs in two directions folded around the sleeve.
  • one bracket (4) per insert is basically sufficient.
  • the invention therefore also provides designs where, for example, only one sleeve per insert has a holder (4). Combinations of a bracket with a bracket arranged in the bracket level with a further bracket, the bracket of which is attached perpendicular to the bracket level, are advantageous on a case-by-case basis.
  • the invention also provides designs where two console brackets oriented perpendicular to one another are welded to a sleeve. Other embodiments of the holder may also be advantageous from case to case.
  • stirrup height H must be selected according to the reinforcement concept and the component thickness.
  • the range of insoles provides a wide range of designs, in which the characteristic dimensions of the spread s, the spacing a and the height H vary.
  • a threaded plug (6) is provided in the embodiment of the insert according to the invention, in order to avoid cement and the like, especially during concreting. comes into contact with the thread and impairs the movement.
  • plugs other than those described can also be used.
  • the insert to be concreted in is only one example of the design of inserts according to the invention for supporting reinforcement layers.
  • Other arrangements of the longitudinal bars 1 as shown are from case to case expedient, for example, when the component thickness is small and the bracket base with a concrete cover ü o is to be laid. In such cases, it would be absolutely necessary to arrange the longitudinal bars 1 on the legs of the brackets 2, it also being advantageous do not attach them on the inside, but on the outside.
  • inserts according to the invention can be used in addition to the temporary use to ensure the correct position of the reinforcement in the concrete cross-section for permanent use for thrust dowelling or load introduction of external loads into the pull zone, the bracket acting as a hanging reinforcement take over.
  • the invention provides plugs (6) which have no recess (8).
  • the recesses (8) serve to accommodate indicators which are in contact effect a color change with fresh concrete and indicate the position of the sleeve face after stripping. In addition, they allow the insertion of a tool so that the plugs can be removed when a screw is to be screwed in.
  • the indicator can also be arranged as a flat application on the plug surface or in some other way.
  • the subject matter of the invention makes the reinforced concrete component "screwable" and thus contributes to the efficient establishment of a connection.
  • the modified inlays can also be used for wall components, particularly where there is a high degree of reinforcement, e.g. in reactor construction, where retrofitting of fasteners is particularly difficult due to the tight reinforcement.
  • the area distribution of the fastening points is determined by the requirements of the reinforcement support. There are therefore a sufficient number of attachment options. Due to the protected location in the concrete, the fasteners resist extreme stress in the event of a disaster such as fire, earthquake or the like and, for safety reasons, are even more important as a constructive means for shear dowelling of the concrete component.

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Reinforcement Elements For Buildings (AREA)
  • Attitude Control For Articles On Conveyors (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
  • Body Structure For Vehicles (AREA)
  • Forms Removed On Construction Sites Or Auxiliary Members Thereof (AREA)
EP88106357A 1987-04-22 1988-04-21 Bewehrungslagen-Abstützvorrichtung Expired - Lifetime EP0290831B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT88106357T ATE69284T1 (de) 1987-04-22 1988-04-21 Bewehrungslagen-abstuetzvorrichtung.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19873713484 DE3713484A1 (de) 1987-04-22 1987-04-22 Bewehrungslagen-abstuetzvorrichtung
DE3713484 1987-04-22

Publications (3)

Publication Number Publication Date
EP0290831A2 EP0290831A2 (de) 1988-11-17
EP0290831A3 EP0290831A3 (en) 1989-01-25
EP0290831B1 true EP0290831B1 (de) 1991-11-06

Family

ID=6326075

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88106357A Expired - Lifetime EP0290831B1 (de) 1987-04-22 1988-04-21 Bewehrungslagen-Abstützvorrichtung

Country Status (3)

Country Link
EP (1) EP0290831B1 (enrdf_load_stackoverflow)
AT (1) ATE69284T1 (enrdf_load_stackoverflow)
DE (1) DE3713484A1 (enrdf_load_stackoverflow)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102014101715A1 (de) * 2014-02-12 2015-08-13 Frank Tanneberger Bewehrung für Betonmöbel oder Betonteile jeglicher Art

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1359709A (fr) * 1963-02-04 1964-04-30 Support de treillis soudés servant d'armature pour la construction des planchers en béton armé
DE2204086A1 (de) * 1972-01-28 1973-08-09 Eisen Fischer Gmbh & Co Kg Verfahren zur herstellung eines metallenen abstandhalters oder dergleichen und nach dem verfahren hergestellter abstandhalterkorb
GB1517800A (en) * 1975-10-15 1978-07-12 Ccl Systems Ltd Connecting reinforcing bars in concrete bodies
NL7605566A (en) * 1976-05-24 1977-11-28 Aarding Weerstandlas Bv Concrete reinforcing mesh distance piece - comprises framework with legs perpendicular to it
GB2137252A (en) * 1983-03-30 1984-10-03 Selma Dreizler Spacer for reinforcement mats
DE8506996U1 (de) * 1985-03-11 1985-07-04 Couwenbergs, Paulus Maria Adrianus Johannes, 7500 Karlsruhe Bauteil - Abstandhalter mit Einrastvorrichtung im Armierungsbau (aus Stahl)
DE8507748U1 (de) * 1985-03-15 1985-05-09 B. Armbruster KG, 7620 Oberwolfach Abstandhalter für Baustahlmatten

Also Published As

Publication number Publication date
DE3713484A1 (de) 1988-11-10
DE3713484C2 (enrdf_load_stackoverflow) 1992-03-19
EP0290831A2 (de) 1988-11-17
ATE69284T1 (de) 1991-11-15
EP0290831A3 (en) 1989-01-25

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