EP0892127A1 - Arrangement for inducing cracks - Google Patents

Arrangement for inducing cracks Download PDF

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Publication number
EP0892127A1
EP0892127A1 EP98110240A EP98110240A EP0892127A1 EP 0892127 A1 EP0892127 A1 EP 0892127A1 EP 98110240 A EP98110240 A EP 98110240A EP 98110240 A EP98110240 A EP 98110240A EP 0892127 A1 EP0892127 A1 EP 0892127A1
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EP
European Patent Office
Prior art keywords
formwork
concrete
strip
formwork wall
built
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EP98110240A
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German (de)
French (fr)
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EP0892127B1 (en
Inventor
Willibald Fischer
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    • 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
    • E04B1/62—Insulation or other protection; Elements or use of specified material therefor
    • E04B1/66—Sealings
    • E04B1/68—Sealings of joints, e.g. expansion joints
    • E04B1/6806—Waterstops
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G11/00—Forms, shutterings, or falsework for making walls, floors, ceilings, or roofs
    • E04G11/06—Forms, shutterings, or falsework for making walls, floors, ceilings, or roofs for walls, e.g. curved end panels for wall shutterings; filler elements for wall shutterings; shutterings for vertical ducts
    • E04G11/08—Forms, which are completely dismantled after setting of the concrete and re-built for next pouring
    • E04G11/085—End form panels for walls

Definitions

  • the invention relates to a device for generating a predetermined crack in one Concrete part of the type explained in the preamble of claim 1.
  • Desired cracks in concrete parts are provided to prevent the concrete from hardening generate inevitable shrinkage cracks at a predetermined location in the concrete part, where the reduction in the resilience of the Concrete does not interfere or where it can be filled more easily.
  • predetermined crack points have been created by so-called dummy joints, in which as considered in the preamble of claim 1, a concrete impermeable installation part in the form of a fiber cement corrugated sheet or a trapezoidal sheet at a predetermined Place in the cross section of the concrete part is introduced, so that this Make a cavity in the concrete filled by the built-in part, which one Weakening the cross section of the concrete part causes so that shrinkage cracks preferably in the area of the built-in part.
  • the installation of this installation part and above all, the holding of the built-in part against the predetermined point however, the pressure exerted by the filled concrete is relatively difficult and labor intensive.
  • the invention is therefore based on the object of a device for generating a Provide predetermined crack location in a concrete part that is easy and inexpensive to handle is.
  • the predetermined tear point is simple by covering the openings of a formwork wall made of perforated material formed so that there is no concrete connection between the Concrete on one side of the formwork wall and the concrete on the other side the formwork wall forms, while outside of that covered by the built-in part Area such a concrete connection exists.
  • the formwork material thus acts as a kind of carrier for the built-in part, but can extend far beyond the built-in part extend out so that it is at the predetermined location easily and quickly can be attached.
  • the configuration of the device according to the invention is particularly expedient according to claim 2 as a shuttering element, such as for producing a Construction joints are used.
  • Construction joints are inevitable if, for example Concrete parts have to be poured separately in several sections, for example if new concrete is poured between the pouring of the two sections must be mixed or if there is a work break between two concreting sections lies.
  • the predetermined tear point is simultaneously at one point relocated, which inherently weakens the load capacity of the concrete part caused.
  • the two weakening measures can thus be carried out at one point in the Emphasized to be summarized.
  • the device according to the invention offers the very advantageous Possibility to install a joint seal at the same time, which in the case of water-contaminated Concrete parts are also used in the usual dummy joints. Due to the design according to the invention, the joint seal is fixed in advance with the Formwork wall to connect and can be installed so that extensive Loafing work that was previously used to attach the joint seal, for example the reinforcement inside the component are necessary, can be omitted.
  • Claims 4 and 5 describe alternative ways of sealing a joint in Form of an elastic joint tape or a joint seal in the form of a joint plate to install.
  • Claim 7 describes a particularly preferred material for the built-in part.
  • the formwork wall can according to claim 8 on a flat strip of openwork material are formed.
  • Claim 9 describes a particularly preferred material for the formwork wall.
  • the formwork wall and the Built-in part according to claim 10 previously created as a unit and only then in the formwork or between the reinforcement of the concrete part.
  • Claims 11 to 13 describe particularly preferred embodiments of a as a unit of prefabricated formwork element for various applications.
  • a concrete cover strip can be molded directly.
  • the device 1 shows a device 1 according to the invention for generating a predetermined crack point in FIG a concrete part 2 shown.
  • the device 1 is a shuttering element for shuttering the interface between a concreting section 2a and a concreting section 2b to be subsequently concreted and formed as a unit prefabricated.
  • the device 1 contains a formwork wall 3 in the form of a flat strip of an openwork material, but the openings are designed so that concrete swell through the openings can, but the material is still suitable as formwork. By the concrete swelling through provides a good connection between the first concreting section 2a and the second concreting section 2b reached.
  • the formwork wall 3 preferably consists of one known from EP-PS 507 054 Material in the form of between cross bars 4 and longitudinal bars 5 of a grid mat made of metal, preferably structural steel, welded expanded metal panel 6. Die Breakthroughs in the expanded metal panel 6 allow on the one hand that concrete easily the opposite side oozes out when the first concreting section 2a is poured is, so that later the second concreting section 2b to the by the can firmly bind protruding and hardened concrete.
  • Both longitudinal edges of the formwork wall 3 are each formed by a molded concrete cover strip 7 covered and are spaced by the concrete cover strips 7 held to the outer surfaces of the concrete part 2.
  • An installation part 8 made of a material is fastened in the middle on the formwork wall 3, that is impermeable to concrete.
  • the installation part 8 covers a predetermined area A of the formwork wall 3, so that there is no connection between the concreting sections 2a and 2b can take place.
  • the installation part 8 preferably consists of a grid mat composed of cross bars 9 and longitudinal bars 10 Metal, preferably structural steel, and a plastic film attached to the mesh mat 11, which is preferably shrunk on both sides of the cross and longitudinal bars of the grid mat as in EP-PS 0 075 641.
  • the installation part 8 is installed in the formwork for the concrete part 2 before the device 1 is installed firmly connected to the formwork wall 3, for example by bridging.
  • the width of the area A, which is covered by the installation part 8, is dimensioned in such a way that the purpose of concentrating shrinkage cracks in the area of the mounting part 8 is achieved becomes.
  • the installation part 8 preferably extends over approximately one third of the total width B of the concrete part 2.
  • the entire shuttering element extends over the entire width B of the Concrete part 2, i.e. over the entire cross section, but on one side of the Concrete part 2 by an arranged on the formwork, not shown, not shown Triangular strip a triangular groove 12 can be formed, the tip abuts the top of the adjacent concrete cover strip 7 of the device 1.
  • shrinkage cracks occur when the concrete hardens, they concentrate in the area of the generated by the shuttering element of the device 1 according to the invention Construction joint and the weakening of the built-in part 8 Cross section of the concrete part 2 ..
  • FIG. 2 shows a further exemplary embodiment of a device according to the invention 21, which is used for water-loaded concrete parts 2.
  • the same reference numerals designate the same or comparable parts as in FIG. 1 and are not explained again.
  • the device 21 consists of two separate, flat strips of the one already described Formwork material, between which a bracket 22 for one of the usual elastic joint tapes 23 is arranged.
  • the bracket 22 consists of a to a basket with a substantially U-shaped cross section curved mesh from structural steel bars, the mesh openings of which remain open.
  • the U-shaped bracket 23 is so welded between the strips 3a and 3b of the formwork wall that their Legs protrude on both sides by about the length of their length.
  • the bracket 22 is preferably the same length as the joint tape 23, so that the joint tape 23 in the usual Half each in the concreting section 2a and half in the concreting section 2b can be embedded and extending across the through the formwork wall 3a, 3b extends construction joint.
  • the device 21 is a unit made of formwork wall 3a, 3b, bracket 22 and Installation part 8a, 8b in the form of a shuttering element for shuttering a construction joint formed between the concreting sections 2a and 2b.
  • the joint tape 23 can be placed in the holder 22 in advance and, if necessary, attached there, for example, by looking at the open side of the U-shaped cross section of the bracket 22 bends together.
  • the device 21 does not contain any concrete cover strips, but is arranged on a reinforcement 24 that is continuous extends through the two concreting sections 2a and 2b. From the outside of the concrete part 2, two of the grooves 12 extend in this exemplary embodiment the concrete part 2 into it, which here by strips with a trapezoidal cross-section were generated.
  • the device 31 is also a shuttering element designed for water-contaminated concrete parts 2 and as a unit with two levels Strips 3a and 3b of a formwork wall and one between the strips 3a, 3b welded joint seal in the form of a sheet metal strip 32.
  • a strip-shaped installation part 8a and 8b fastened from the grid mat shrunk with plastic film so that the two Strips 8a, 8b of the built-in part an area A of the perforated formwork wall 3a, 3b cover about one third of the total width B of the concrete part 2 corresponds.
  • the device 31 is also with the outer longitudinal edges of the formwork walls 3a, 3b between the continuous reinforcement 24 for the concrete part 2 attached and arranged in a place where a formwork of the first to be cast Concreting section 2a against a later pouring concreting section 2b is required and predetermined. Again, on both sides of the concrete part 2 grooves 12 arranged with a triangular cross section, the tips are aligned with the longitudinal edges of the formwork wall 3a, 3b.
  • the Formwork wall made of other openwork formwork materials, such as a perforated plate.
  • the built-in part can also be made from one other, concrete-impermeable material, such as a plastic or Metal plate or the like.
  • the devices according to FIGS. 2 and 3 can also be provided with concrete cover strips and directly to the external formwork for push the concrete part 2. If necessary, the area covered by the installation part can be be enlarged or reduced.
  • the device according to the invention is still Can also be used for smaller concrete parts that are cast in one go can, and also allows exact positioning and precise location of the installation part under the pressure of the poured concrete.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Mechanical Engineering (AREA)
  • Forms Removed On Construction Sites Or Auxiliary Members Thereof (AREA)
  • Curing Cements, Concrete, And Artificial Stone (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
  • Surgical Instruments (AREA)
  • Forging (AREA)

Abstract

The device forms predetermined cracking points on concrete components (2), and has an insert (8,8a,8b) which creates a reduction in the component cross section, and which is not permeable to concrete. The insert is arranged on a shuttering wall (3,3a,3b) which extends mainly across the cross section of the component, and which is made from a perforated material. The perforated wall is covered by the insert in a region (A) which corresponds to the required reduction of the cross section. The device may also be in the form of an element for shuttering a boundary surface between two concrete sections which are to be cast one after the other.

Description

Die Erfindung bezieht sich auf eine Vorrichtung zum Erzeugen einer Sollrißstelle in einem Betonteil der im Oberbegriff von Anspruch 1 erläuterten Art.The invention relates to a device for generating a predetermined crack in one Concrete part of the type explained in the preamble of claim 1.

Soll-Rißstellen in Betonteilen werden vorgesehen, um die beim Erhärten des Betons unvermeidlichen Schwindrisse an einer vorbestimmten Stelle im Betonteil zu erzeugen, wo die durch die Schwindrisse verursachte Verringetung der Belastbarkeit des Betons nicht stört bzw. wo sie leichter verfüllt werden können.Desired cracks in concrete parts are provided to prevent the concrete from hardening generate inevitable shrinkage cracks at a predetermined location in the concrete part, where the reduction in the resilience of the Concrete does not interfere or where it can be filled more easily.

Bislang werden Soll-Rißstellen durch sogenannte Scheinfugen erzeugt, bei denen, wie im Oberbegriff des Anspruches 1 berücksichtigt, ein betonundurchlässiges Einbauteil in Form einer Faserzement-Wellplatte oder eines Trapezbleches an einer vorbestimmten Stelle im Querschnitt des Betonteils eingebracht wird, so daß sich an dieser Stelle ein durch das Einbauteil ausgefüllter Hohlraum im Beton ausbildet, der eine Schwachung des Querschnittes des Betonteiles bewirkt, so daß sich Schwindrisse bevorzugt im Bereich des Einbauteils ausbilden. Das Einbauen dieses Einbauteils und vor allen Dingen das Festhalten des Einbauteils an der vorbestimmten Stelle gegen den vom eingefüllten Beton ausgeübten Druck gestaltet sich jedoch relativ schwierig und arbeitsaufwendig.So far, predetermined crack points have been created by so-called dummy joints, in which as considered in the preamble of claim 1, a concrete impermeable installation part in the form of a fiber cement corrugated sheet or a trapezoidal sheet at a predetermined Place in the cross section of the concrete part is introduced, so that this Make a cavity in the concrete filled by the built-in part, which one Weakening the cross section of the concrete part causes so that shrinkage cracks preferably in the area of the built-in part. The installation of this installation part and above all, the holding of the built-in part against the predetermined point however, the pressure exerted by the filled concrete is relatively difficult and labor intensive.

Es ist weiterhin bereits bekannt, mit Hilfe eines durchbrochenen Schalungsmaterials, beispielsweise Streckmetall, einen zunächst freibleibenden Hohlraum im Beton auszuschalen, der nachfolgend vergossen wird. Dieser Hohlraum kann auch durch das durchbrochene Schalungsmaterial vollständig von innen überdeckende, betonundurchlässige Rohre gebildet werden, die nachfolgend aus der Streckmetallschalung herausgezogen werden, so daß der Hohlraum vergossen werden kann. Aber auch diese Art, Scheinfugen auszubilden, ist relativ aufwendig und führt, zumindest im letzteren Ausführungsbeispiel durch die die Öffnungen im Streckmetall abdeckenden Rohre zu keiner guten Anbindung zwischen dem Beton außerhalb der Hohlräume und dem nach dem Aushärten des äußeren Betons in die Hohlräume eingegossenen Verfüllbeton. It is also already known, with the help of an openwork formwork material, for example expanded metal to form a cavity in the concrete that is initially free, which is subsequently shed. This cavity can also be through the Openwork formwork material completely covered from the inside, impermeable to concrete Pipes are formed, which subsequently form the expanded metal formwork be pulled out so that the cavity can be potted. But also this way of forming dummy joints is relatively complex and leads, at least in the latter embodiment by covering the openings in the expanded metal Pipes not connecting well between the concrete outside the cavities and the one poured into the cavities after the outer concrete has hardened Backfill concrete.

Der Erfindung liegt somit die Aufgabe zugrunde, eine Vorrichtung zum Erzeugen einer Sollrißstelle in einem Betonteil bereitzustellen, die einfach und kostengünstig handhabbar ist.The invention is therefore based on the object of a device for generating a Provide predetermined crack location in a concrete part that is easy and inexpensive to handle is.

Die Aufgabe wird durch die in Anspruch 1 angegebene Vorrichtung gelöst.The object is achieved by the device specified in claim 1.

Durch die erfindungsgemäße Ausgestaltung wird die Sollrißstelle auf einfache Weise durch Abdecken der Öffnungen einer Schalungswandung aus durchbrochenem Material gebildet, so daß sich an dieser Stelle keine Betonverbindung zwischen dem Beton auf einer Seite der Schalungswandung und dem Beton auf der anderen Seite der Schalungswandung ausbildet, während außerhalb des durch das Einbauteil abgedeckten Bereichs eine derartige Betonverbindung besteht. Das Schalungsmaterial wirkt so als eine Art Träger für das Einbauteil, kann sich jedoch weit über das Einbauteil hinaus erstrecken, so daß es an der vorbestimmten Stelle einfach und schnell befestigt werden kann.Due to the design according to the invention, the predetermined tear point is simple by covering the openings of a formwork wall made of perforated material formed so that there is no concrete connection between the Concrete on one side of the formwork wall and the concrete on the other side the formwork wall forms, while outside of that covered by the built-in part Area such a concrete connection exists. The formwork material thus acts as a kind of carrier for the built-in part, but can extend far beyond the built-in part extend out so that it is at the predetermined location easily and quickly can be attached.

Besonders zweckmäßig ist die Ausgestaltung der erfindungsgemäßen Vorrichtung gemäß Anspruch 2 als Abschalelement, wie sie beispielsweise zum Herstellen einer Arbeitsfuge verwendet werden. Arbeitsfugen entstehen zwangsläufig, wenn beispielsweise Betonteile zeitlich getrennt in mehreren Abschnitten vergossen werden müssen, beispielsweise wenn zwischen dem Vergießen der beiden Abschnitte neuer Beton gemischt werden muß oder wenn zwischen zwei Betonierabschnitten eine Arbeitspause liegt. Durch diese Ausgestaltung wird die Sollrißstelle gleichzeitig an eine Stelle verlegt, die von Haus aus eine gewisse Schwächung der Belastbarkeit des Betonteils verursacht. Damit können die beiden Schwächungsmaßnahmen an einer Stelle im Betonte zusammengefaßt werden.The configuration of the device according to the invention is particularly expedient according to claim 2 as a shuttering element, such as for producing a Construction joints are used. Construction joints are inevitable if, for example Concrete parts have to be poured separately in several sections, for example if new concrete is poured between the pouring of the two sections must be mixed or if there is a work break between two concreting sections lies. With this configuration, the predetermined tear point is simultaneously at one point relocated, which inherently weakens the load capacity of the concrete part caused. The two weakening measures can thus be carried out at one point in the Emphasized to be summarized.

Weiterhin bietet die erfindungsgemäße Vorrichtung gemäß Anspruch 3 die sehr vorteilhafte Möglichkeit, gleichzeitig eine Fugendichtung mit einzubauen, die bei wasserbelasteten Betonteilen auch bei den bisher üblichen Scheinfugen eingesetzt wird. Durch die erfindungsgemäße Ausgestaltung ist die Fugendichtung vorab fest mit der Schalungwandung zu verbinden und kann so eingebaut werden, so daß umfangreiche Rödelarbeiten, die bislang zum Befestigen der Fugendichtung beispielsweise an der Bewehrung im Inneren des Bauteiles notwendig sind, entfallen können.Furthermore, the device according to the invention offers the very advantageous Possibility to install a joint seal at the same time, which in the case of water-contaminated Concrete parts are also used in the usual dummy joints. Due to the design according to the invention, the joint seal is fixed in advance with the Formwork wall to connect and can be installed so that extensive Loafing work that was previously used to attach the joint seal, for example the reinforcement inside the component are necessary, can be omitted.

Die Ansprüche 4 und 5 beschreiben alternative Möglichkeiten, eine Fugendichtung in Form eines elastischen Fugenbandes oder eine Fugendichtung in Form eines Fugenbleches einzubauen.Claims 4 and 5 describe alternative ways of sealing a joint in Form of an elastic joint tape or a joint seal in the form of a joint plate to install.

Durch die erfindungsgemäße Ausgestaltung ist es ausreichend, als Einbauteil einen ebenen Streifen des betonundurchlässigen Materials gemäß Anspruch 6 einzusetzen.Due to the configuration according to the invention, it is sufficient to use one as an installation part use flat strips of the material impermeable to concrete according to claim 6.

Anspruch 7 beschreibt ein besonders bevorzugtes Material für das Einbauteil.Claim 7 describes a particularly preferred material for the built-in part.

Auch die Schalungswandung kann gemäß Anspruch 8 auf einem ebenen Streifen des durchbrochenen Materials gebildet werden.The formwork wall can according to claim 8 on a flat strip of openwork material are formed.

Anspruch 9 beschreibt ein besonders bevorzugtes Material für die Schalungswandung.Claim 9 describes a particularly preferred material for the formwork wall.

Durch die erfindungsgemäße Ausgestaltung kann die Schalungswandung und das Einbauteil gemäß Anspruch 10 vorab als Einheit erstellt und erst danach in die Schalung bzw. zwischen die Bewehrung des Betonteils eingebaut werden.The formwork wall and the Built-in part according to claim 10 previously created as a unit and only then in the formwork or between the reinforcement of the concrete part.

Die Ansprüche 11 bis 13 beschreiben besonders bevorzugte Ausführungsformen eines als Einheit vorgefertigten Schalungselementes für verschiedene Anwendungszwecke.Claims 11 to 13 describe particularly preferred embodiments of a as a unit of prefabricated formwork element for various applications.

Bei Bedarf kann an wenigstens eine der Längskanten der Schalungswandung gemäß Anspruch 14 eine Betondeckungsleiste direkt angeformt werden.If necessary, according to at least one of the longitudinal edges of the formwork wall Claim 14 a concrete cover strip can be molded directly.

Ausführungsbeispiele der Erfindung werden nachfolgend anhand der Zeichnungen näher erläutert. Es zeigen:

Fig. 1
ein erstes Ausführungsbeispiel einer erfindungsgemäßen Vorrichtung in schematischer Darstellung,
Fig. 2
ein zweites Ausführungsbeispiel einer erfindungsgemäßen Vorrichtung in schematischer Darstellung, und
Fig. 3
ein drittes Ausführungsbeispiel der erfindungsgemäßen Vorrichtung in schematischer Darstellung.
Exemplary embodiments of the invention are explained in more detail below with reference to the drawings. Show it:
Fig. 1
a first embodiment of a device according to the invention in a schematic representation,
Fig. 2
a second embodiment of a device according to the invention in a schematic representation, and
Fig. 3
a third embodiment of the device according to the invention in a schematic representation.

In Fig. 1 ist eine erfindungsgemäße Vorrichtung 1 zum Erzeugen einer Sollrißstelle in einem Betonteil 2 gezeigt. Die Vorrichtung 1 ist als Abschalelement zum Abschalen der Grenzfläche zwischen einem zuerst zu betonierenden Betonierabschnitt 2a und einem anschließend zu betonierenden Betonierabschnitt 2b ausgebildet und als Einheit vorgefertigt. Die Vorrichtung 1 enthält eine Schalungswandung 3 in Form eines ebenen Streifens aus einem durchbrochenen Material, dessen Durchbrechungen jedoch so ausgebildet sind, daß zwar Beton durch die Durchbrechungen hindurchquellen kann, das Material sich jedoch trotzdem noch als Schalung eignet. Durch den durchquellenden Beton wird eine gute Anbindung zwischen dem ersten Betonierabschnitt 2a und dem zweiten Betonierabschnitt 2b erreicht.1 shows a device 1 according to the invention for generating a predetermined crack point in FIG a concrete part 2 shown. The device 1 is a shuttering element for shuttering the interface between a concreting section 2a and a concreting section 2b to be subsequently concreted and formed as a unit prefabricated. The device 1 contains a formwork wall 3 in the form of a flat strip of an openwork material, but the openings are designed so that concrete swell through the openings can, but the material is still suitable as formwork. By the concrete swelling through provides a good connection between the first concreting section 2a and the second concreting section 2b reached.

Die Schalungswandung 3 besteht bevorzugt aus einem aus der EP-PS 507 054 bekannten Material in Form einer zwischen Querstäbe 4 und Längsstäbe 5 einer Gittermatte aus Metall, bevorzugt Baustahl, eingeschweißten Streckmetalltafel 6. Die Durchbrechungen in der Streckmetalltafel 6 gestatten einerseits, daß Beton leicht auf der gegenüberliegenden Seite herausquillt, wenn der erste Betonierabschnitt 2a vergossen wird, so daß später der zweite Betonierabschnitt 2b sich an den durch den herausquellenden und erhärteten Beton fest anbinden kann.The formwork wall 3 preferably consists of one known from EP-PS 507 054 Material in the form of between cross bars 4 and longitudinal bars 5 of a grid mat made of metal, preferably structural steel, welded expanded metal panel 6. Die Breakthroughs in the expanded metal panel 6 allow on the one hand that concrete easily the opposite side oozes out when the first concreting section 2a is poured is, so that later the second concreting section 2b to the by the can firmly bind protruding and hardened concrete.

Beide Längskanten der Schalungswandung 3 sind jeweils durch eine angeformte Betondeckungsleiste 7 bedeckt und werden durch die Betondeckungsleisten 7 in Abstand zu den äußeren Oberflächen des Betonteils 2 gehalten. Both longitudinal edges of the formwork wall 3 are each formed by a molded concrete cover strip 7 covered and are spaced by the concrete cover strips 7 held to the outer surfaces of the concrete part 2.

Mittig auf der Schalungswandung 3 ist ein Einbauteil 8 aus einem Material befestigt, das undurchlässig für Beton ist. Das Einbauteil 8 überdeckt einen vorbestimmten Bereich A der Schalungswandung 3, so daß dort keine Anbindung zwischen den Betonierabschnitten 2a und 2b stattfinden kann. Das Einbauteil 8 besteht bevorzugt aus einer aus Querstäben 9 und Längsstäben 10 zusammengesetzten Gittermatte aus Metall, bevorzugt Baustahl, und einer auf der Gittermatte befestigten Kunststoff-Folie 11, die bevorzugt über beide Seiten der Quer- und Längsstäbe der Gittermatte aufgeschrumpft wurde, wie dies in der EP-PS 0 075 641.An installation part 8 made of a material is fastened in the middle on the formwork wall 3, that is impermeable to concrete. The installation part 8 covers a predetermined area A of the formwork wall 3, so that there is no connection between the concreting sections 2a and 2b can take place. The installation part 8 preferably consists of a grid mat composed of cross bars 9 and longitudinal bars 10 Metal, preferably structural steel, and a plastic film attached to the mesh mat 11, which is preferably shrunk on both sides of the cross and longitudinal bars of the grid mat as in EP-PS 0 075 641.

Das Einbauteil 8 wird vor Einbau der Vorrichtung 1 in die Schalung für das Betonteil 2 fest mit der Schalungswandung 3 verbunden, beispielsweise durch Verrödeln.The installation part 8 is installed in the formwork for the concrete part 2 before the device 1 is installed firmly connected to the formwork wall 3, for example by bridging.

Die Breite des Bereichs A, der von dem Einbauteil 8 abgedeckt wird, wird so bemessen, daß der Zweck, Schwindrisse im Bereich des Einbauteiles 8 zu konzentrieren, erreicht wird. Bevorzugt erstreckt sich das Einbauteil 8 über etwa ein Drittel der Gesamtbreite B des Betonteiles 2.The width of the area A, which is covered by the installation part 8, is dimensioned in such a way that the purpose of concentrating shrinkage cracks in the area of the mounting part 8 is achieved becomes. The installation part 8 preferably extends over approximately one third of the total width B of the concrete part 2.

Das gesamte Abschalelement erstreckt sich hingegen über die gesamte Breite B des Betonteiles 2, d.h. über den gesamten Querschnitt, wobei jedoch an einer Seite des Betonteiles 2 durch eine an der nicht gezeichneten Schalung angeordnete, nicht gezeichnete Dreieckleiste eine dreieckige Nut 12 ausgeformt werden kann, deren Spitze an die Spitze der anliegenden Betondeckungsleiste 7 der Vorrichtung 1 stößt.The entire shuttering element, however, extends over the entire width B of the Concrete part 2, i.e. over the entire cross section, but on one side of the Concrete part 2 by an arranged on the formwork, not shown, not shown Triangular strip a triangular groove 12 can be formed, the tip abuts the top of the adjacent concrete cover strip 7 of the device 1.

Treten jetzt beim Aushärten des Betons Schwindrisse auf, so konzentrieren sie sich im Bereich der durch das Abschalelement der erfindungsgemäßen Vorrichtung 1 erzeugten Arbeitsfuge und der durch das Einbauteil 8 erzeugten Schwächung des Querschnitts des Betonteils 2..If shrinkage cracks occur when the concrete hardens, they concentrate in the area of the generated by the shuttering element of the device 1 according to the invention Construction joint and the weakening of the built-in part 8 Cross section of the concrete part 2 ..

Fig. 2 zeigt ein weiteres Ausführungsbeispiel einer erfindungsgemäßen Vorrichtung 21, die für wasserbeaufschlagte Betonteile 2 eingesetzt wird. In diesem Ausführungsbeispiel bezeichnen gleiche Bezugszeichen gleiche oder vergleichbare Teile wie Fig. 1 und sind nicht nochmals erläutert. 2 shows a further exemplary embodiment of a device according to the invention 21, which is used for water-loaded concrete parts 2. In this embodiment The same reference numerals designate the same or comparable parts as in FIG. 1 and are not explained again.

Die Vorrichtung 21 besteht aus zwei getrennten, ebenen Streifen des bereits beschriebenen Schalungsmaterials, zwischen die eine Halterung 22 für eines der üblichen elastischen Fugenbänder 23 angeordnet ist. Die Halterung 22 besteht aus einer zu einem Korb mit im wesentlichen U-förmigem Querschnitt gebogenen Gittermatte aus Baustahlstäben, deren Gitteröffnungen offen bleiben. Die U-förmige Halterung 23 ist so zwischen die Streifen 3a und 3b der Schalungswandung eingeschweißt, daß ihre Schenkel beidseitig etwa um die Hätte ihrer Längen vorstehen. Die Halterung 22 ist bevorzugt genauso lang wie das Fugenband 23, so daß das Fugenband 23 in üblicher Weise jeweils zur Hälfte in den Betonierabschnitt 2a und zur Hälfte in den Betonierabschnitt 2b eingebettet werden kann und sich quer über die durch die Schalungswandung 3a, 3b gebildete Arbeitsfuge erstreckt. Beidseits der Halterung 22 ist jeweils die Hälfte eines Einbauteils 8a, 8b aus dem oben beschriebenen Material so angeordnet und mit derjeweils anliegenden Schalungswandung 3a bzw. 3b verbunden, daß deren Durchbrechungen im Bereich A abgedeckt werden, wobei sich der Bereich A wiederum über etwa ein Drittel der Gesamtbreite B des Betonteiles 2 erstreckt.The device 21 consists of two separate, flat strips of the one already described Formwork material, between which a bracket 22 for one of the usual elastic joint tapes 23 is arranged. The bracket 22 consists of a to a basket with a substantially U-shaped cross section curved mesh from structural steel bars, the mesh openings of which remain open. The U-shaped bracket 23 is so welded between the strips 3a and 3b of the formwork wall that their Legs protrude on both sides by about the length of their length. The bracket 22 is preferably the same length as the joint tape 23, so that the joint tape 23 in the usual Half each in the concreting section 2a and half in the concreting section 2b can be embedded and extending across the through the formwork wall 3a, 3b extends construction joint. Is on both sides of the bracket 22 each half of an installation part 8a, 8b from the material described above arranged and connected to the respective adjacent formwork walls 3a and 3b, that their openings are covered in area A, the Area A in turn extends over about a third of the total width B of the concrete part 2.

Die Vorrichtung 21 ist als Einheit aus Schalungswandung 3a, 3b, Halterung 22 und Einbauteil 8a, 8b in Form eines Abschalelementes zum Abschalen einer Arbeitsfuge zwischen den Betonierabschnitten 2a und 2b ausgebildet. Auch das Fugenband 23 kann vorab in die Halterung 22 eingelegt und dort gegebenenfalls befestigt werden, beispielsweise indem man die offene Seite des U-förmigen Querschnitts der Halterung 22 zusammenbiegt. Die Vorrichtung 21 enthält im vorliegenden Falle keine Betondeckungsleisten, sondern ist an einer Bewehrung 24 angeordnet, die sich durchgehend durch die beiden Betonierabschnitte 2a und 2b erstreckt. Von der Außenseite des Betonteils 2 erstrecken sich in diesem Ausführungsbeispiel zwei der Nuten 12 in das Betonteil 2 hinein, die hier durch Leisten mit einem trapezförmigen Querschnitt erzeugt wurden.The device 21 is a unit made of formwork wall 3a, 3b, bracket 22 and Installation part 8a, 8b in the form of a shuttering element for shuttering a construction joint formed between the concreting sections 2a and 2b. The joint tape 23 can be placed in the holder 22 in advance and, if necessary, attached there, for example, by looking at the open side of the U-shaped cross section of the bracket 22 bends together. In the present case, the device 21 does not contain any concrete cover strips, but is arranged on a reinforcement 24 that is continuous extends through the two concreting sections 2a and 2b. From the outside of the concrete part 2, two of the grooves 12 extend in this exemplary embodiment the concrete part 2 into it, which here by strips with a trapezoidal cross-section were generated.

Fig. 3 zeigt ein drittes Ausführungsbeispiel einer erfindungsgemäßen Vorrichtung 31, wobei auch hier wieder gleiche Bauteile wie bei den vorangegangenen Figuren mit gleichen Bezugszeichen versehen wurden. Auch die Vorrichtung 31 ist als Abschalelement für wasserbelastete Betonteile 2 ausgebildet und als Einheit mit zwei ebenen Streifen 3a und 3b einer Schalungswandung und einer zwischen den Streifen 3a, 3b eingeschweißten Fugendichtung in Form eines Metallblechstreifens 32 ausgebildet. Beidseitig des Fugenbleches 32 ist jeweils ein streifenförmiges Einbauteil 8a und 8b aus der mit Kunststoff-Folie beschrumpften Gittermatte so befestigt, daß die beiden Streifen 8a, 8b des Einbauteiles einen Bereich A der durchbrochenen Schalungswandung 3a, 3b abdecken, der etwa einem Drittel der Gesamtbreite B des Betonteiles 2 entspricht. Auch die Vorrichtung 31 ist mit den äußeren Längskanten der Schalungswandungen 3a, 3b zwischen die durchgehende Bewehrung 24 für das Betonteil 2 befestigt und an einer Stelle angeordnet, wo eine Abschalung des zuerst zu vergießenden Betonierabschnittes 2a gegen einen später zu vergießenden Betonierabschnitt 2b erforderlich und vorbestimmt ist. Auch hier sind wiederum an beiden Seiten des Betonteiles 2 Nuten 12 mit dreieckigem Querschnitt angeordnet, deren Spitzen auf die Längskanten der Schalungswandung 3a, 3b ausgerichtet sind.3 shows a third exemplary embodiment of a device 31 according to the invention, the same components as in the previous figures have been provided with the same reference numerals. The device 31 is also a shuttering element designed for water-contaminated concrete parts 2 and as a unit with two levels Strips 3a and 3b of a formwork wall and one between the strips 3a, 3b welded joint seal in the form of a sheet metal strip 32. On both sides of the joint plate 32 is a strip-shaped installation part 8a and 8b fastened from the grid mat shrunk with plastic film so that the two Strips 8a, 8b of the built-in part an area A of the perforated formwork wall 3a, 3b cover about one third of the total width B of the concrete part 2 corresponds. The device 31 is also with the outer longitudinal edges of the formwork walls 3a, 3b between the continuous reinforcement 24 for the concrete part 2 attached and arranged in a place where a formwork of the first to be cast Concreting section 2a against a later pouring concreting section 2b is required and predetermined. Again, on both sides of the concrete part 2 grooves 12 arranged with a triangular cross section, the tips are aligned with the longitudinal edges of the formwork wall 3a, 3b.

In Abwandlung der beschriebenen und gezeichneten Ausführungsbeispiele kann die Schalungswandung aus anderen, durchbrochenen Schalungsmaterialien, wie beispielsweise einem Lochblech, gefertigtwerden. Auch das Einbauteil kann aus einem anderen, betonundurchlässigen Material, wie beispielsweise einer Kunststoff- oder Metallplatte oder dgl. bestehen. Auch die Vorrichtungen nach den Fig. 2 und 3 können mit Betondeckungsleisten versehen werden und direkt an die Außenschalungen für das Betonteil 2 anstoßen. Falls erforderlich, kann der vom Einbauteil überdeckte Bereich vergrößert oder verkleinert werden. Die erfindungsgemäße Vorrichtung ist weiterhin auch für kleinere Betonteile einsetzbar, die in einem Zuge gegossen werden können, und gestattet auch dort eine exakte Positionierung und lagegenaue Fixierung des Einbauteils unter dem Druck des eingegossenen Betons.In a modification of the described and drawn exemplary embodiments, the Formwork wall made of other openwork formwork materials, such as a perforated plate. The built-in part can also be made from one other, concrete-impermeable material, such as a plastic or Metal plate or the like. The devices according to FIGS. 2 and 3 can also be provided with concrete cover strips and directly to the external formwork for push the concrete part 2. If necessary, the area covered by the installation part can be be enlarged or reduced. The device according to the invention is still Can also be used for smaller concrete parts that are cast in one go can, and also allows exact positioning and precise location of the installation part under the pressure of the poured concrete.

Claims (14)

Vorrichtung (1, 21) zum Erzeugen einer Sollrißstelle in einem Betonteil (2) mit einem vorbestimmten Querschnitt, die ein eine gewollte Schwächung des Querschnitts verursachendes, betonundurchlässiges Einbauteil (8, 8a, 8b) aufweist, dadurch gekennzeichnet, daß das Einbauteil (8, 8a, 8b) an einer sich im wesentlichen über den Querschnitt des Betonteils (2) erstreckenden Schalungswandung (3, 3a, 3b) aus durchbrochenem Material derart angeordnet ist, daß das Einbauteil (8, 8a, 8b) die durchbrochene Schalungswandung (3, 3a, 3b) über einen der gewünschten Schwächung des Querschnitts entsprechenden Bereich (A) abdeckt.Device (1, 21) for creating a predetermined crack in a concrete part (2) with a predetermined cross-section, which has a concrete-impermeable installation part (8, 8a, 8b) causing a desired weakening of the cross-section, characterized in that the installation part (8, 8a, 8b) is arranged on a formwork wall (3, 3a, 3b) of perforated material which extends essentially over the cross section of the concrete part (2) such that the built-in part (8, 8a, 8b) has the perforated formwork wall (3, 3a , 3b) covers an area (A) corresponding to the desired weakening of the cross section. Vorrichtung nach Anspruch 1, gekennzeichnet durch ihre Ausbildung als Abschalelement zum Abschalen einer Grenzfläche zwischen zwei nacheinander zu betonierenden Betonierabschnitten (2a, 2b).Apparatus according to claim 1, characterized by its design as a shuttering element for shuttering an interface between two concreting sections (2a, 2b) to be concreted in succession. Vorrichtung nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß mit der Schalungswandung (3a, 3b) eine Fugendichtung (22, 32) verbunden ist.Device according to claim 1 or 2, characterized in that a joint seal (22, 32) is connected to the formwork wall (3a, 3b). Vorrichtung nach Anspruch 3, dadurch gekennzeichnet, daß die Fugendichtung ein elastisches Fugenband (22) ist, das in einer mit der Schalungswandung (3a, 3b) verbundenen Halterung (23) aufgenommen ist.Device according to claim 3, characterized in that the joint seal is an elastic joint tape (22) which is received in a holder (23) connected to the formwork wall (3a, 3b). Vorrichtung nach Anspruch 3, dadurch gekennzeichnet, daß die Fugendichtung ein Fugenblech (32) ist, das mit der aus Metall bestehenden Schalungswandung (3a, 3b) verschweißt ist.Device according to claim 3, characterized in that the joint seal is a joint plate (32) which is welded to the metal formwork wall (3a, 3b). Vorrichtung nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß das Einbauteil (8, 8a, 8b) wenigstens einen ebenen Streifen des betonundurchlässigen Materials enthält. Device according to one of claims 1 to 5, characterized in that the built-in part (8, 8a, 8b) contains at least one flat strip of the material impermeable to concrete. Vorrichtung nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, daß das Einbauteil (8, 8a, 8b) aus einer mit einer Kunststoff-Folie (11) beschrumpften Gittermatte (9, 10) besteht.Device according to one of claims 1 to 6, characterized in that the built-in part (8, 8a, 8b) consists of a grid mat (9, 10) shrunk with a plastic film (11). Vorrichtung nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, daß die Schalungswandung (3, 3a, 3b) wenigstens einen ebenen Streifen des durchbrochenen Materials enthält.Device according to one of claims 1 to 7, characterized in that the formwork wall (3, 3a, 3b) contains at least one flat strip of the perforated material. Vorrichtung nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, daß die Schalungswandung (3, 3a, 3b) aus einem zwischen Quer- und Längsstäben (4, 5) einer Gittermatte eingeschweißten Streckmetallblech (6) besteht.Device according to one of claims 1 to 8, characterized in that the formwork wall (3, 3a, 3b) consists of an expanded metal sheet (6) welded between transverse and longitudinal bars (4, 5) of a mesh mat. Vorrichtung nach einem der Ansprüche 1 bis 9, gekennzeichnet durch ihre Ausbildung als ein in einer Einheit aus Schalungswandung (3, 3a, 3b) und Einbauteil (8, 8a, 8b) vorgefertigtes Schalungselement.Device according to one of claims 1 to 9, characterized by its design as a formwork element prefabricated in a unit consisting of formwork wall (3, 3a, 3b) and built-in part (8, 8a, 8b). Vorrichtung nach Anspruch 10, dadurch gekennzeichnet, daß das Schalungselement eine streifenförmige Schalungswandung (3) und ein streifenförmiges Einbauteil (8) aufweist, das im wesentlichen mittig auf der Schalungswandung (3) befestigt ist.Apparatus according to claim 10, characterized in that the formwork element has a strip-shaped formwork wall (3) and a strip-shaped built-in part (8) which is fastened essentially centrally on the formwork wall (3). Vorrichtung nach Anspruch 10, dadurch gekennzeichnet, daß das Schalungselement zwei streifenförmige Schalungswandungen (3a, 3b), eine zwischen den Schalungswandungen befestigte Halterung (23) für eine Fugendichtung (22) und zwei streifenförmige Einbauteile (8a, 8b) enthält, die beidseitig der Halterung die jeweilige Schalungswandung (3a, 3b) bedecken.Apparatus according to claim 10, characterized in that the formwork element contains two strip-shaped formwork walls (3a, 3b), a holder (23) for a joint seal (22) fastened between the formwork walls and two strip-shaped built-in parts (8a, 8b) which are on both sides of the holder cover the respective formwork wall (3a, 3b). Vorrichtung nach Anspruch 10, dadurch gekennzeichnet, daß das Schalungselement zwei streifenförmige Schalungswandungen (3a, 3b) aus Metall, ein zwischen die Schalungswandungen eingeschweißtes Fugenblech (32) und zwei streifenförmige Einbauteile (8a, 8b) enthält, die beidseitig des Fugenblechs (32) die jeweilige Schalungswandung (3a, 3b) bedecken.Apparatus according to claim 10, characterized in that the formwork element contains two strip-shaped formwork walls (3a, 3b) made of metal, a joint sheet (32) welded between the formwork walls and two strip-shaped built-in parts (8a, 8b) which on both sides of the joint sheet (32) Cover the respective formwork wall (3a, 3b). Vorrichtung nach einem der Ansprüche 10 bis 13, dadurch gekennzeichnet, daß das Schalungselement wenigstens eine mit einer der Langskanten einer Schalungswandung (3, 3a, 3b) fest verbundene Betondeckungsleiste (7) aufweist.Device according to one of claims 10 to 13, characterized in that the formwork element has at least one concrete cover strip (7) firmly connected to one of the long edges of a formwork wall (3, 3a, 3b).
EP98110240A 1997-07-15 1998-06-04 Shuttering and method for inducing cracks Expired - Lifetime EP0892127B1 (en)

Applications Claiming Priority (2)

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DE29712510U DE29712510U1 (en) 1997-07-15 1997-07-15 Device for generating a predetermined breaking point
DE29712510U 1997-07-15

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EP0892127B1 EP0892127B1 (en) 2004-03-03

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Publication number Priority date Publication date Assignee Title
EP1944421A1 (en) 2007-01-10 2008-07-16 FWR Solutions GmbH Formwork
EP1980677A2 (en) * 2007-04-03 2008-10-15 Peca Verbundtechnik GmbH Formwork for creating a break point

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10136819B4 (en) * 2001-07-27 2006-02-09 Oswald, Peter Reinforcing element for flat concrete parts

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GB769592A (en) * 1954-11-04 1957-03-13 Chester Irving Williams Improvements in or relating to a crack-controlling joint strip
EP0075641A2 (en) 1981-09-28 1983-04-06 Angelika Kirchner-Carl Composite material
DE3405187A1 (en) * 1983-10-28 1985-05-09 Georg Carl & Sohn GmbH & Co KG, 8644 Pressig Screeding bar
EP0507054A1 (en) 1991-04-05 1992-10-07 Peca-Verbundtechnik Gmbh Shuttering element
DE9203276U1 (en) * 1992-03-11 1993-07-15 Peca-Verbundtechnik GmbH, 8312 Dingolfing formwork
DE9301566U1 (en) * 1992-09-08 1994-01-20 Peca-Verbundtechnik Gmbh, 84130 Dingolfing Shuttering element
DE9311710U1 (en) * 1993-08-05 1994-12-01 Peca-Verbundtechnik Gmbh, 84130 Dingolfing Formwork for making a concrete slab
WO1996010120A1 (en) * 1994-09-27 1996-04-04 Lesa Systems Limited Method and apparatus for forming adjacent floor slabs

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB769592A (en) * 1954-11-04 1957-03-13 Chester Irving Williams Improvements in or relating to a crack-controlling joint strip
EP0075641A2 (en) 1981-09-28 1983-04-06 Angelika Kirchner-Carl Composite material
DE3405187A1 (en) * 1983-10-28 1985-05-09 Georg Carl & Sohn GmbH & Co KG, 8644 Pressig Screeding bar
EP0507054A1 (en) 1991-04-05 1992-10-07 Peca-Verbundtechnik Gmbh Shuttering element
DE9203276U1 (en) * 1992-03-11 1993-07-15 Peca-Verbundtechnik GmbH, 8312 Dingolfing formwork
DE9301566U1 (en) * 1992-09-08 1994-01-20 Peca-Verbundtechnik Gmbh, 84130 Dingolfing Shuttering element
DE9311710U1 (en) * 1993-08-05 1994-12-01 Peca-Verbundtechnik Gmbh, 84130 Dingolfing Formwork for making a concrete slab
WO1996010120A1 (en) * 1994-09-27 1996-04-04 Lesa Systems Limited Method and apparatus for forming adjacent floor slabs

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1944421A1 (en) 2007-01-10 2008-07-16 FWR Solutions GmbH Formwork
DE102007001513A1 (en) 2007-01-10 2008-07-17 Fwr Solutions Gmbh formwork
EP1980677A2 (en) * 2007-04-03 2008-10-15 Peca Verbundtechnik GmbH Formwork for creating a break point
EP1980677A3 (en) * 2007-04-03 2011-11-23 Peca Verbundtechnik GmbH Formwork for creating a break point

Also Published As

Publication number Publication date
ATE261040T1 (en) 2004-03-15
DE29712510U1 (en) 1997-09-25
ES2217453T3 (en) 2004-11-01
EP0892127B1 (en) 2004-03-03
DE59810879D1 (en) 2004-04-08
PT892127E (en) 2004-07-30

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