EP0715039A1 - Elément de coffrage - Google Patents

Elément de coffrage Download PDF

Info

Publication number
EP0715039A1
EP0715039A1 EP95117597A EP95117597A EP0715039A1 EP 0715039 A1 EP0715039 A1 EP 0715039A1 EP 95117597 A EP95117597 A EP 95117597A EP 95117597 A EP95117597 A EP 95117597A EP 0715039 A1 EP0715039 A1 EP 0715039A1
Authority
EP
European Patent Office
Prior art keywords
formwork
support
wall
cross
formwork wall
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.)
Granted
Application number
EP95117597A
Other languages
German (de)
English (en)
Other versions
EP0715039B1 (fr
Inventor
Willi Fischer
Johann Kerscher
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.)
Fischer Willibald
Original Assignee
Fischer Willibald
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 Fischer Willibald filed Critical Fischer Willibald
Publication of EP0715039A1 publication Critical patent/EP0715039A1/fr
Application granted granted Critical
Publication of EP0715039B1 publication Critical patent/EP0715039B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • E04G11/36—Forms, shutterings, or falsework for making walls, floors, ceilings, or roofs for floors, ceilings, or roofs of plane or curved surfaces end formpanels for floor shutterings
    • E04G11/365—Stop-end shutterings

Definitions

  • the invention relates to a formwork element of the type explained in the preamble of claim 1.
  • Such a formwork element is known from EP 93 691 A2.
  • the known formwork element contains a formwork wall made of a profiled material provided with openings, in particular an expanded metal or a sheet metal with a profiled or partially permeable surface.
  • the formwork wall is erected with the help of a column in the form of a plurality of triangular wooden wedges.
  • the formwork wall must be nailed to the wooden wedges and the wooden wedges to the lower formwork, which is quite complex.
  • the upper reinforcement is pushed through the formwork wall at pre-punched points, whereby the wooden wedges protrude beyond the upper edge of the formwork wall.
  • the formwork wall is thus the only means of keeping the reinforcement at a predetermined distance from one another and from the lower formwork or the top of the concrete element. Since it is relatively thin, it can deform under the pressure of the reinforcement during concreting, so that the distance between the reinforcements can change. After concreting the first concreting section, the wooden wedges have to be removed in order to be able to concrete the second concreting section, which is quite complex.
  • a formwork element for shuttering edge areas of concrete slabs is known, which is integrated in a stripping bar.
  • the puller bar is necessary if the top of a concrete slab has to be pulled off smoothly after pouring. But even then, pulling bars are only necessary parallel to the pulling direction and at a distance corresponding to the length of the pulling device. To peel off connecting surfaces with the known formwork element, additional pulling bars would have to be used, which in themselves are not necessary. Since the scraper bar requires a certain amount of production, the production of the concrete slab would be more expensive.
  • a latticework covered with plastic film is used as the formwork wall, which is only possible for certain connection surfaces.
  • the reinforcement is either pushed through the plastic film or integrated into the stripping bar. However, the plastic film is not stiff enough to keep the reinforcement at a predetermined distance. Integrated reinforcement can only be short, otherwise the entire formwork element would be too bulky.
  • the invention is therefore based on the object of providing a formwork element which can be produced inexpensively and which is inexpensive and easy to install, for shuttering connecting surfaces in the production of structural elements from concrete, and to provide an inexpensive and simple method for its production.
  • the formwork element according to the invention is simple to manufacture and can be used immediately without further preparatory work. Since the formwork element, including the support and formwork wall, is designed as lost formwork that remains in the finished concrete, the concrete can be cast on from both sides without having to make any changes to the formwork beforehand. Furthermore, the spatial bar construction stiffens the surface material of the formwork wall to such an extent that the reinforcing bars also when pouring the concrete, i.e. can be held securely in their predetermined position under an additional load.
  • the support can be placed on a lower reinforcement of the concrete slab or the concrete element, wherein the protrusion of the formwork wall over the standing edge prevents concrete from passing between the lower reinforcement and the lower formwork.
  • the full height of the support can serve as a spacer between an upper reinforcement and the lower formwork or between an upper and a lower reinforcement.
  • Claim 5 describes a particularly preferred embodiment of the rod construction used for the support.
  • Claim 6 describes a particularly preferred arrangement of the formwork wall, in which the support is fully anchored in the concrete and thus ensures a good connection.
  • the support is particularly easy to produce if it consists of an A-shaped, flat grid mat.
  • Claim 9 describes a particularly preferred surface material for the formwork wall.
  • Claim 10 describes a particularly preferred embodiment of the formwork element according to the invention.
  • the object is further achieved by a method according to claim 11.
  • the method according to the invention can be carried out inexpensively and leads to a formwork element which, despite simple and inexpensive manufacture, has sufficient stability for the intended use.
  • FIG. 1 shows a formwork element 1 which is simultaneously designed as a spacer for a reinforcement and which has a formwork wall 2 and a support 3 which are connected to one another to form a lost formwork which can remain in the concrete.
  • the formwork wall 2 consists of a perforated sheet material, in the illustrated embodiment a strip of expanded metal sheet, as is commercially available is.
  • the support 3 consists of a spatial bar construction made of cross bars 4 and longitudinal bars 5, which are composed in the manner of a grid mat.
  • Cross and longitudinal bars 4, 5 consist of conventional structural steel bars, as are common for reinforcement or for the production of reinforcement meshes in concrete construction.
  • the diameter and length of the rods 4, 5 can be selected according to the intended use. Since the support 3 has an elongated shape in FIG. 1, the crossbars 4 are defined as those rods which extend transversely to the longitudinal extension of the formwork wall 2, while the longitudinal rods 5 are those rods which run parallel to the longitudinal extension of the formwork wall 2.
  • the support 3 is bent in an A-shape, with a cross section in the form of an isosceles triangle, the legs of the triangle being formed by the angled halves of the cross bars 4.
  • the imaginary connecting line between the triangular tips of all the cross bars 4 of the support 3 forms an upper edge 6.
  • the free ends of all the cross bars 4 of the support 3 lie in a common plane 7.
  • the free ends of the cross bars 4 are preferably connected by one of the longitudinal bars 5, and the upper edge 6 is formed by a longitudinal bar 5 or there are at least one or two longitudinal bars 5 in the vicinity of the upper edge 6.
  • the formwork wall 2 covers the support 3 only on one side of the isosceles cross section and is fastened there between the internal cross bars 4 and the external longitudinal bars 5.
  • the formwork wall 2 is wider than half the length of the crossbars 4, an edge region of the formwork wall 2 projecting upwards by an amount a over the upper edge 6 and downwards by an amount b via the lower level 7.
  • the formwork element 1 is used to form a connection surface between two construction sections to be concreted in succession for producing a concrete slab or the like.
  • the reinforcement layer 9 is designed as a continuous reinforcement which extends through both concrete sections to be poured one after the other.
  • the stretch material of the formwork wall 2 is bendable, so that the reinforcement 9 is pressed into the overhang b and the overhang b then extends downwards between the reinforcing bars of the reinforcement layer 9 and covers the space between the reinforcement layer 9 and the formwork 8.
  • an upper reinforcement layer 10 which is also designed as reinforcement bars or reinforcement mats, which extends through both concrete sections to be poured one after the other.
  • the support 3 serves as a predetermined spacer between the two reinforcement layers 9 and 10.
  • the reinforcement bars of the reinforcement layer 10 are also pressed into the formwork wall 2 and rest on one or more of the longitudinal bars 5 of the support 3.
  • either one of the longitudinal bars 5 is attached directly to the upper edge 6, or two longitudinal bars 5, as shown in FIG. 2, extend parallel to the upper edge 6 on both sides and at a short distance from it.
  • the protrusion a can then be covered with one of the customary, removable concrete cover strips 11 if it should not extend to the upper edge of the later concrete element, or at least just below it, so that leakage of the concrete is avoided during the first construction phase.
  • the first construction phase is then cast from that side of the formwork wall 2 on which the cross bars 4 are located. Any air can escape through the formwork wall 2 to the outside, so that almost the entire rod structure of the support 3 is embedded in the first construction phase. Concrete also passes through the holes in the perforated formwork wall 2 and forms a rough surface on the other side of the formwork wall 2, which together with the external longitudinal bars 5 causes a good connection of the second concreting section.
  • the formwork element 1 is produced by first producing a flat formwork material 1 'shown in FIG. 3. To produce the formwork sheet material 1 ', the cross bars 4, the longitudinal bars 5 and the formwork wall 2 are first cut to the desired dimensions, the dimensions of the bars 4, 5 being adjusted to the dimensions of the connecting surface.
  • the formwork wall 2 from a strip of expanded metal sheet is cut to a length that corresponds to the length of the longitudinal bars 5.
  • the width of the formwork wall 2 is greater than half the length of the cross bars 4 by the sum of the projections a + b, ie their length between their free ends and their center later forming the upper edge 6.
  • the 4 transverse and longitudinal bars which are aligned parallel to one another but at right angles to one another, are placed on top of one another with the required overhangs a, b with the interposition of the formwork wall 2.
  • the cross bars 4 and the longitudinal bars 5 are placed in the area of the formwork wall 2 on the formwork wall 2, and directly on top of each other in the area without formwork wall.
  • the transverse and longitudinal bars 4, 5 are then connected to one another at selected or all crossing points, the connection being made in the area of the formwork wall 2 through the formwork wall 2.
  • the rods are preferably welded to one another at the crossing points.
  • the area a which extends beyond the center of the cross bars 4 forming the later upper edge 6, remains unconnected, as does the area b.
  • All cross bars 4 of the formwork sheet material 1 are then angled about their center to the triangular support 3 by bending, the formwork wall 2 being essentially not bent, so that in particular the projection a remains in the extension of one leg of the triangular cross section of the support 3.
  • the rod construction can, for example, also be designed as a rod carrier with longitudinal rods which are connected to one another by transverse rods bent in a wave or zigzag shape.
  • the cross section of the support can be varied.
  • the support can also have the shape of a right-angled triangle, so that the formwork wall 2 is vertical.
  • the later upper edge is of course no longer in the middle of the cross bars, but offset in the middle between their two free ends.
  • the lower overhang of the formwork wall can be omitted if the formwork element is not placed on a reinforcement layer but directly on the one below the formwork.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Mechanical Engineering (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Forms Removed On Construction Sites Or Auxiliary Members Thereof (AREA)
  • Crystals, And After-Treatments Of Crystals (AREA)
  • Saccharide Compounds (AREA)
  • Bipolar Transistors (AREA)
EP95117597A 1994-11-30 1995-11-08 Elément de coffrage Expired - Lifetime EP0715039B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4442639A DE4442639A1 (de) 1994-11-30 1994-11-30 Schalungselement
DE4442639 1994-11-30

Publications (2)

Publication Number Publication Date
EP0715039A1 true EP0715039A1 (fr) 1996-06-05
EP0715039B1 EP0715039B1 (fr) 2000-05-03

Family

ID=6534558

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95117597A Expired - Lifetime EP0715039B1 (fr) 1994-11-30 1995-11-08 Elément de coffrage

Country Status (5)

Country Link
EP (1) EP0715039B1 (fr)
AT (1) ATE192530T1 (fr)
DE (2) DE4442639A1 (fr)
ES (1) ES2147814T3 (fr)
PT (1) PT715039E (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1132545A3 (fr) * 2000-03-09 2003-07-23 Willibald Fischer Matériel de coffrage
DE10037193C2 (de) * 2000-03-09 2003-08-28 Willibald Fischer Schalungsmaterial
DE202009005388U1 (de) 2009-04-08 2009-06-04 Fwr Solutions Gmbh Abschalelement
DE202009015679U1 (de) 2009-12-01 2011-04-14 Peca - Verbundtechnik Gmbh Abschalelement für Betonplatten

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE29613627U1 (de) * 1996-08-07 1996-09-26 Degen, Paul, 77830 Bühlertal Mehrzweckabstandshalter für den Betonbau

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH469883A (de) * 1961-12-22 1969-03-15 Reising Wolfgang Tafelförmiges Bauelement zur Herstellung von bleibende oder verlorenen Schalungen
EP0093691A1 (fr) 1982-04-21 1983-11-09 Kurt Stauffer Pompe à piston pour liquides
DE3405187A1 (de) 1983-10-28 1985-05-09 Georg Carl & Sohn GmbH & Co KG, 8644 Pressig Abziehbalken
EP0457167A1 (fr) * 1990-05-14 1991-11-21 Willibald Fischer Panneau de coffrage
EP0586867A1 (fr) * 1992-09-08 1994-03-16 Peca-Verbundtechnik Gmbh Coffrage d'about

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE9206140U1 (de) * 1992-05-07 1993-09-09 Peca-Verbundtechnik Gmbh, 84130 Dingolfing Schalung

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH469883A (de) * 1961-12-22 1969-03-15 Reising Wolfgang Tafelförmiges Bauelement zur Herstellung von bleibende oder verlorenen Schalungen
EP0093691A1 (fr) 1982-04-21 1983-11-09 Kurt Stauffer Pompe à piston pour liquides
DE3405187A1 (de) 1983-10-28 1985-05-09 Georg Carl & Sohn GmbH & Co KG, 8644 Pressig Abziehbalken
EP0457167A1 (fr) * 1990-05-14 1991-11-21 Willibald Fischer Panneau de coffrage
EP0586867A1 (fr) * 1992-09-08 1994-03-16 Peca-Verbundtechnik Gmbh Coffrage d'about

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1132545A3 (fr) * 2000-03-09 2003-07-23 Willibald Fischer Matériel de coffrage
DE10037193C2 (de) * 2000-03-09 2003-08-28 Willibald Fischer Schalungsmaterial
DE202009005388U1 (de) 2009-04-08 2009-06-04 Fwr Solutions Gmbh Abschalelement
DE102010012419A1 (de) 2009-04-08 2010-10-14 Fwr Solutions Gmbh Abschalelement
DE202009015679U1 (de) 2009-12-01 2011-04-14 Peca - Verbundtechnik Gmbh Abschalelement für Betonplatten

Also Published As

Publication number Publication date
DE4442639A1 (de) 1996-06-13
EP0715039B1 (fr) 2000-05-03
PT715039E (pt) 2000-10-31
ATE192530T1 (de) 2000-05-15
ES2147814T3 (es) 2000-10-01
DE59508263D1 (de) 2000-06-08

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