EP2009183B1 - Shuttering element - Google Patents

Shuttering element Download PDF

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Publication number
EP2009183B1
EP2009183B1 EP08010205A EP08010205A EP2009183B1 EP 2009183 B1 EP2009183 B1 EP 2009183B1 EP 08010205 A EP08010205 A EP 08010205A EP 08010205 A EP08010205 A EP 08010205A EP 2009183 B1 EP2009183 B1 EP 2009183B1
Authority
EP
European Patent Office
Prior art keywords
bars
cross
shuttering element
formwork
longitudinal
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.)
Revoked
Application number
EP08010205A
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German (de)
French (fr)
Other versions
EP2009183A1 (en
Inventor
Sven Obernolte
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Individual
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Individual
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Application filed by Individual filed Critical Individual
Publication of EP2009183A1 publication Critical patent/EP2009183A1/en
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    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D27/00—Foundations as substructures
    • E02D27/01—Flat foundations
    • 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
    • E04G9/00—Forming or shuttering elements for general use
    • E04G9/02—Forming boards or similar elements
    • E04G9/05—Forming boards or similar elements the form surface being of plastics
    • 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
    • E04G9/00—Forming or shuttering elements for general use
    • E04G9/02—Forming boards or similar elements
    • E04G9/06—Forming boards or similar elements the form surface being of metal
    • 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
    • E04G9/00—Forming or shuttering elements for general use
    • E04G9/02—Forming boards or similar elements
    • E04G9/06—Forming boards or similar elements the form surface being of metal
    • E04G9/065—Forming boards or similar elements the form surface being of metal the form surface being of wire mesh

Definitions

  • Shuttering elements of this type are made of DE 38 15 870 C1 known and are used for example for foundation formwork.
  • the lattice mat is a structural steel mat formed from crossed round bars, which is bent or folded either flat or to a suitable formwork profile. This structural steel mat gives the formwork element the necessary mechanical strength.
  • the film is a stable shrink film, for example made of polyethylene, with which the lattice is shrunk, so that the grid openings are each closed by two layers of film and thus one obtains a flat, impermeable concrete for the formwork element.
  • the object of the invention is to provide a cost-effective formwork element with improved stability.
  • cross bars have a flattened cross-section whose longer axis is oriented at right angles to the longitudinal bars.
  • the stiffer cross bars may optionally be arranged on the side facing away from the formwork cavity outside or the formwork cavity facing inside of the formwork element. If the wider cross bars are arranged on the outside, they may also differ in their width, for example, such that the width of the horizontally extending transverse bars gradually increases from top to bottom. The bending stiffness the grid mat then increases in proportion to the increasing from top to bottom static pressure of the filled liquid concrete.
  • the wider cross bars are arranged on the inside of the formwork element, they can also serve as spacers for a reinforcement to be mounted in the formwork cavity.
  • Fig. 1 is a cross section of a foundation formwork shown, which is formed by two parallel spaced-apart formwork elements 10.
  • the core of each formwork element is a grid mat 12 made of structural steel, which is formed by vertical longitudinal bars 14 and horizontal transverse bars 16, 16a.
  • These longitudinal and transverse rods are welded together in the usual way at the crossing points.
  • the peculiarity here is that some of the transverse rods, namely the cross bars 16a-e are not round rods, but instead have an elongated, approximately rectangular profile, wherein the larger axis of the profile is oriented at right angles to the longitudinal bars 14.
  • the cross-section of these cross bars may also be T- or L-shaped or the like, as exemplified for the transverse bar 16c.
  • Each of the two grid mats 12 is hollowed in a closed shrink film 18.
  • bracket 20 The upper and lower edges of the two formwork elements 10 are held together in a known manner by bracket 20.
  • the transverse bars 16a-d are each arranged on the outer side of the relevant formwork element, and their width - in the direction perpendicular to the longitudinal bars 14 - increases from top to bottom, ie from the transverse bar 16a to the transverse bar 16d. Due to the cross-sectional shape of the transverse rods 16a-e stiffening of the grid mat and thus the shuttering element is achieved, and is achieved by the different cross-sectional shapes, the flexural rigidity increases from top to bottom, and thus approximately follows the course of the static pressure inside the shuttering cavity, if this is filled with liquid concrete.
  • transverse rods 16e are arranged on the inside of the respective formwork element and thus project into the formwork cavity. This makes it possible to use these cross bars 16e as a spacer for a reinforcement cage 22 or other steel reinforcement, which is to be arranged at a distance from the formwork walls in the formwork cavity.

Abstract

The formwork unit (10) has a grid mat (12) i.e. reinforcement mat, enclosed by a foil (18) i.e. shrinkage foil, where the grid mat includes longitudinal bars (14) and transverse bars (16, 16a-16e) that cross each other. The transverse bars include a flattened cross section, where a longer axis of the transverse bars is oriented at right angles to the longitudinal bars. The transverse bars arranged on a side of the longitudinal bars are different in the width. The longitudinal bars run vertically and the width of the transverse bars increases from the top to bottom.

Description

Schalungselemente dieser Art sind aus DE 38 15 870 C1 bekannt und werden beispielsweise für Fundamentschalungen eingesetzt. Bei der Gittermatte handelt es sich um eine aus gekreuzten Rundstäben gebildete Baustahlmatte, die entweder eben oder zu einem geeigneten Schalungsprofil gebogen oder gekantet ist. Diese Baustahlmatte gibt dem Schalungselement die notwendige mechanische Festigkeit. Bei der Folie handelt es sich um eine stabile Schrumpffolie, beispielsweise aus Polyethylen, mit der das Gitterwerk umschrumpft ist, so daß die Gitteröffnungen jeweils durch zwei Folienlagen verschlossen sind und man somit ein flächiges, für den Beton undurchlässiges Schalungselement erhält.Shuttering elements of this type are made of DE 38 15 870 C1 known and are used for example for foundation formwork. The lattice mat is a structural steel mat formed from crossed round bars, which is bent or folded either flat or to a suitable formwork profile. This structural steel mat gives the formwork element the necessary mechanical strength. When the film is a stable shrink film, for example made of polyethylene, with which the lattice is shrunk, so that the grid openings are each closed by two layers of film and thus one obtains a flat, impermeable concrete for the formwork element.

Aufgabe der Erfindung ist es, ein kostengünstiges Schalungselement mit verbesserter Stabilität zu schaffen.The object of the invention is to provide a cost-effective formwork element with improved stability.

Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß mindestens einige der Querstäbe einen abgeflachten Querschnitt haben, dessen längere Achse rechtwinklig zu den Längsstäben orientiert ist.This object is achieved in that at least some of the cross bars have a flattened cross-section whose longer axis is oriented at right angles to the longitudinal bars.

Durch die abgeflachte Querschnittsform der Querstäbe, die in üblicher Weise mit den Längsstäben verschweißt sind, wird eine erhöhte Biegesteifigkeit der Gittermatte insgesamt erreicht, so daß das Schalungselement dem Druck des anstehenden Betons besser standhält.Due to the flattened cross-sectional shape of the cross bars, which are welded in a conventional manner with the longitudinal bars, an increased bending stiffness of the grid mat is achieved in total, so that the formwork element better withstand the pressure of the upcoming concrete.

Vorteilhafte Ausgestaltungen sind in den Unteransprüchen angegeben.Advantageous embodiments are specified in the subclaims.

Die steiferen Querstäbe können wahlweise auf der vom Schalungshohlraum abgewandten Außenseite oder der dem Schalungshohlraum zugewandten Innenseite des Schalungselements angeordnet sein. Wenn die breiteren Querstäbe auf der Außenseite angeordnet sind, können sie sich auch in ihrer Breite unterscheiden, beispielsweise derart, daß die Breite der waagerecht verlaufenden Querstäbe von oben nach unten nach und nach zunimmt. Die Biegesteifigkeit der Gittermatte erhöht sich dann proportional zu dem von oben nach unten zunehmenden statischen Druck des eingefüllten Flüssigbetons.The stiffer cross bars may optionally be arranged on the side facing away from the formwork cavity outside or the formwork cavity facing inside of the formwork element. If the wider cross bars are arranged on the outside, they may also differ in their width, for example, such that the width of the horizontally extending transverse bars gradually increases from top to bottom. The bending stiffness the grid mat then increases in proportion to the increasing from top to bottom static pressure of the filled liquid concrete.

Wenn die breiteren Querstäbe auf der Innenseite des Schalungselements angeordnet sind, können sie zugleich als Abstandhalter für eine im Schalungshohlraum anzubringende Bewehrung dienen.If the wider cross bars are arranged on the inside of the formwork element, they can also serve as spacers for a reinforcement to be mounted in the formwork cavity.

Im folgenden wird ein Ausführungsbeispiel anhand der Zeichnung näher erläutert.In the following an embodiment will be explained in more detail with reference to the drawing.

Es zeigen:

Fig. 1
einen Schnitt durch eine Fundamentschalung mit erfindungsgemäβen Schalungselementen; und
Fig. 2
eine Seitenansicht eines der Schalungselemente nach Fig. 1.
Show it:
Fig. 1
a section through a foundation formwork with erfindungsgemäβen formwork elements; and
Fig. 2
a side view of the formwork elements after Fig. 1 ,

In Fig. 1 ist ein Querschnitt einer Fundamentschalung gezeigt, die durch zwei parallel in Abstand zueinander angeordnete Schalungselemente 10 gebildet wird. Kernstück jedes Schalungselements ist eine Gittermatte 12 aus Baustahl, die durch vertikale Längsstäbe 14 und horizontale Querstäbe 16, 16a - egebildet wird. Diese Längs- und Querstäbe sind in üblicher Weise an den Kreuzungspunkten miteinander verschweißt. Die Besonderheit besteht hier jedoch darin, daß einige der Querstäbe, nämlich die Querstäbe 16a - e keine Rundstäbe sind, sondern statt dessen ein längliches, annähernd rechteckiges Profil haben, wobei die größere Achse des Profils rechtwinklig zu den Längsstäben 14 orientiert ist. Wahlweise kann der Querschnitt diese Querstäbe auch T- oder L-förmig oder dergleichen sein, wie beispielhaft für den Querstab 16c dargestellt ist.In Fig. 1 is a cross section of a foundation formwork shown, which is formed by two parallel spaced-apart formwork elements 10. The core of each formwork element is a grid mat 12 made of structural steel, which is formed by vertical longitudinal bars 14 and horizontal transverse bars 16, 16a. These longitudinal and transverse rods are welded together in the usual way at the crossing points. The peculiarity here, however, is that some of the transverse rods, namely the cross bars 16a-e are not round rods, but instead have an elongated, approximately rectangular profile, wherein the larger axis of the profile is oriented at right angles to the longitudinal bars 14. Optionally, the cross-section of these cross bars may also be T- or L-shaped or the like, as exemplified for the transverse bar 16c.

Jede der beiden Gittermatten 12 ist in eine geschlossene Schrumpffolie 18 eingehöhlt.Each of the two grid mats 12 is hollowed in a closed shrink film 18.

Die oberen und unteren Ränder der beiden Schalungselemente 10 sind in bekannter Weise durch Bügel 20 zusammengehalten.The upper and lower edges of the two formwork elements 10 are held together in a known manner by bracket 20.

Die Querstäbe 16a - d sind jeweils auf der Außenseite des betreffenden Schalungselements angeordnet, und ihre Breite - in der Richtung rechtwinklig zu den Längsstäben 14 - nimmt von oben nach unten, also vom Querstab 16a zum Querstab 16d zu. Durch die Querschnittsform der Querstäbe 16a - e wird eine Versteifung der Gittermatte und damit des Schalungselements erreicht, und durch die unterschiedlichen Querschnittsformen wird erreicht, daß die Biegesteifigkeit von oben nach unten zunimmt und damit etwa dem Verlauf des statischen Druckes im Inneren des Schalungshohlraums folgt, wenn dieser mit flüssigem Beton gefüllt ist.The transverse bars 16a-d are each arranged on the outer side of the relevant formwork element, and their width - in the direction perpendicular to the longitudinal bars 14 - increases from top to bottom, ie from the transverse bar 16a to the transverse bar 16d. Due to the cross-sectional shape of the transverse rods 16a-e stiffening of the grid mat and thus the shuttering element is achieved, and is achieved by the different cross-sectional shapes, the flexural rigidity increases from top to bottom, and thus approximately follows the course of the static pressure inside the shuttering cavity, if this is filled with liquid concrete.

Die Querstäbe 16e sind auf der Innenseite des jeweiligen Schalungselements angeordnet und springen somit in den Schalungshohlraum vor. Dies erlaubt es, diese Querstäbe 16e als Abstandhalter für einen Bewehrungskorb 22 oder eine sonstige Stahlbewehrung zu verwenden, die in Abstand zu den Schalungswänden im Schalungshohlraum anzuordnen ist.The transverse rods 16e are arranged on the inside of the respective formwork element and thus project into the formwork cavity. This makes it possible to use these cross bars 16e as a spacer for a reinforcement cage 22 or other steel reinforcement, which is to be arranged at a distance from the formwork walls in the formwork cavity.

Claims (6)

  1. Shuttering element comprising a grid (12) formed by longitudinal bars (14) and cross-bars (16, 18a-e) crossing the longitudinal bars, said grid being encased in a foil (18), characterised in that a least some of the cross-bars (16a-e) have a flattened cross-section the major axis of which is oriented at right angles to the longitudinal bars (14).
  2. Shuttering element according to claim 1, characterised in that the foil (18) is a shrink foil.
  3. Shuttering element according to any of the proceding claims, characterised in that the cross-bars (16a-e) arranged on one side of the longitudinal bars (14) differ in their width.
  4. Shuttering element according to claim 3, characterised in that the longitudinal bars (14) extend vertically and the width of the cross-bars (16a-e) increases from top to bottom.
  5. Shuttering element according to any of the preceding claims, characterised in that at least one of the cross-bars (16e) having a flattened cross-section is arranged on the internal side of the shuttering element facing towards the formwork cavity and forms a spacer for an armour (22).
  6. Shuttering element according to any of the preceding claims, characterised in that at least some of the cross-bars (16c) have a flattened T- or L-shaped cross-section.
EP08010205A 2007-06-27 2008-06-04 Shuttering element Revoked EP2009183B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE202007008976U DE202007008976U1 (en) 2007-06-27 2007-06-27 An element

Publications (2)

Publication Number Publication Date
EP2009183A1 EP2009183A1 (en) 2008-12-31
EP2009183B1 true EP2009183B1 (en) 2010-01-13

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ID=39619410

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Application Number Title Priority Date Filing Date
EP08010205A Revoked EP2009183B1 (en) 2007-06-27 2008-06-04 Shuttering element

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EP (1) EP2009183B1 (en)
AT (1) ATE455211T1 (en)
DE (2) DE202007008976U1 (en)
DK (1) DK2009183T3 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102015223112A1 (en) * 2015-11-23 2017-05-24 Mako Gmbh & Co. Kg Schalungstechnik An element

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59122628A (en) * 1982-12-27 1984-07-16 Toshiba Corp Mould for construction of outer wall of underground type building
NL8303866A (en) * 1983-11-10 1985-06-03 Grad Heinz Carl Ing LOST FORMWORK.
DE3815870C1 (en) 1988-05-09 1989-08-03 Peca-Verbundtechnik Gmbh, 8312 Dingolfing, De
DE9206140U1 (en) * 1992-05-07 1993-09-09 Peca Verbundtechnik formwork

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DE202007008976U1 (en) 2008-10-30
EP2009183A1 (en) 2008-12-31
ATE455211T1 (en) 2010-01-15
DE502008000314D1 (en) 2010-03-04
DK2009183T3 (en) 2010-04-26

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