EP0341507B1 - Casing - Google Patents

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Publication number
EP0341507B1
EP0341507B1 EP89107678A EP89107678A EP0341507B1 EP 0341507 B1 EP0341507 B1 EP 0341507B1 EP 89107678 A EP89107678 A EP 89107678A EP 89107678 A EP89107678 A EP 89107678A EP 0341507 B1 EP0341507 B1 EP 0341507B1
Authority
EP
European Patent Office
Prior art keywords
formwork
walls
section
casing
foundation
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
EP89107678A
Other languages
German (de)
French (fr)
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EP0341507A3 (en
EP0341507A2 (en
Inventor
Willibald Fischer
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.)
PECA-VERBUNDTECHNIK GmbH
Original Assignee
PECA-VERBUNDTECHNIK GmbH
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Publication date
Application filed by PECA-VERBUNDTECHNIK GmbH filed Critical PECA-VERBUNDTECHNIK GmbH
Priority to AT89107678T priority Critical patent/ATE88229T1/en
Publication of EP0341507A2 publication Critical patent/EP0341507A2/en
Publication of EP0341507A3 publication Critical patent/EP0341507A3/en
Application granted granted Critical
Publication of EP0341507B1 publication Critical patent/EP0341507B1/en
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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
    • 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
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D27/00—Foundations as substructures
    • E02D27/01—Flat foundations
    • E02D27/02—Flat foundations without substantial excavation
    • 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
    • E04G13/00—Falsework, forms, or shutterings for particular parts of buildings, e.g. stairs, steps, cornices, balconies foundations, sills
    • 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
    • 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

  • the invention relates to a formwork for foundation parts of the type explained in the preamble of claim 1.
  • Such formwork is known from US Pat. No. 3,730,475.
  • the known formwork consists of formwork walls made of solid plastic, which are connected to each other by a plurality of stiffening ribs running across the height of the formwork walls and across the opening.
  • the lower free edges of the formwork walls can support a reinforcement grid that remains in the concrete.
  • a recess must be formed in the ammunition grid, which is precisely matched to the thickness of the formwork walls within narrow tolerances.
  • stiffeners are arranged in the vertical direction and are formed as molded-in ribs, with a depression occurring on the inside of the formwork in the area of the ribs, these stiffeners must be relatively close to one another, with the filler opening for through the relatively wide spacers extending over the upper opening the concrete is at least partially covered. Subsequent arrangement of additional stiffening elements or spacers is possible only with great difficulty.
  • the known formwork can only be used as reusable formwork. It is not possible to adapt the known formwork to special conditions on the construction site.
  • a formwork which consists of a U-shaped strip from a latticework shrunk with plastic film and forms a channel with vertical side walls into which the concrete is poured from above.
  • the cross-section of the finished foundation is thus constant over the entire height of the foundation part, the width of the cross-section over the entire height of the foundation part corresponding to the width of the standing area necessary for the corresponding floor conditions.
  • the supports or the wall receiving surface of the foundation part must theoretically only be so large that supports or wall can lie snugly.
  • the invention is therefore based on the object to provide a formwork of the type mentioned, which can be designed as both lost and reusable formwork, which can be easily and inexpensively manufactured and installed on site, and which can be easily adapted to special needs can be adjusted on site.
  • the formwork can still be adapted to special needs on site.
  • the formwork can be designed both as lost formwork and as reusable formwork.
  • the use of the special stiffening elements and their arrangement along the opening as well as the use of at least one spacer ensures that even a flexible formwork wall with the claimed cross-section tapering upwards can withstand the concrete pressure. Since the spacers and the stiffening elements are attached to the latticework by piercing the plastic film, they can also be easily removed from the outside, if desired.
  • the formwork according to the invention is much easier and cheaper to manufacture than the known formwork with the same cross-sectional shape.
  • Claims 2 and 3 describe the application of the invention to a lost (claim 2) or removable and reusable (claim 3) formwork.
  • a lost formwork 1 for production of a strip foundation can be seen, which is designed as a channel with two lateral formwork walls 2 and 3 forming the long boundaries of the channel and a formwork floor 4.
  • the side formwork walls 2, 3 and the formwork floor 4 are integrally bent from a strip of composite material, which consists of a latticework 5 and a plastic film 6 shrunk onto the latticework 5 on both sides.
  • the latticework 5 is preferably one of the usual structural steel mats of suitable strength with crossed transverse or longitudinal bars 5a, 5b.
  • the plastic film 6 is one of the usual shrink films of suitable strength, as can also be used for packaging purposes, for example.
  • the plastic film 6 was placed in two webs, 6a, 6b on both sides of the still flat latticework 5 and shrunk under the action of heat, so that it closes tightly around the rods 5a and 5b due to the associated contraction and both layers 6a, 6b through the Openings of the latticework 5 are connected to each other. Then the latticework 5 with the shrunk plastic film 6 is bent to the desired profile.
  • the formwork was designed in such a way that the completely cast foundation part is provided in the lower region 7a in the form of a plate with an elongated rectangular cross section and in the upper region 7b above it with a trapezoidal cross section tapering upwards.
  • the floor width b 1 is determined according to static aspects depending on the formwork length l, while the reduced upper width b 2 is coordinated with the necessary footprint for the supports or walls.
  • stiffening elements 8 and 9 are arranged in the vicinity of the upper edges of the side formwork walls 2 and 3, which consist of three straight longitudinal rods 8a and 9a assembled in a triangle and curved longitudinal rods 8b, 9b exist, the curved longitudinal bars 8b, 9b each connecting two of the straight longitudinal bars 8a and 9a. In this case, only two curved longitudinal bars 8b and 9b can be provided per stiffening element 8 and 9, respectively.
  • the stiffening elements 8 and 9 are fastened to the side walls 2 and 3 with the aid of a spacer 10.
  • the spacers 10 penetrate the plastic film 6 and encompass both a transverse or longitudinal rod 5a or 5b of the lattice work and one of the longitudinal rods 8a or 9a of the stiffening elements 8 or 9 using suitable, known connecting means, in the simplest case, wire wire.
  • suitable, known connecting means in the simplest case, wire wire.
  • These spacers 10 ensure that both the width b2 of the upper opening of the formwork 1 and the distance between the formwork walls 2 and 3 remain essentially unchanged over the entire height of the formwork walls.
  • the narrow sides of the formwork 1 can be closed with suitable pieces of material. Both conventional formwork boards and a correspondingly cut and fastened piece of the material also used for the formwork 1 made of lattice work shrunk with plastic film are suitable for this purpose.
  • FIG. 3 shows a section similar to FIG. 2 through a further exemplary embodiment of the invention in the form of a reusable formwork 11.
  • the formwork 11 consists of at least two opposing formwork walls 12 and 13, each of which is made from a cut strip of the formwork already used for the formwork 1 used, shrunk with plastic film 6 latticework 5 exist.
  • the two side formwork walls 12 and 13 were then bent in steps and fixed in a mirror-image manner using the spacers 10 already described and at a predetermined distance in parallel position to one another and placed on a concrete base 14.
  • the greatest width b1 of the formwork 11, the width of the floor area, is in turn based on the static conditions, while the width b2 on the top of the formwork 11 is adapted to the required footprint for supports or walls.
  • the cross section of the foundation part produced with the formwork 11 thus has a plate-shaped lower region 15a with an elongated rectangular cross section, a central region 15b with a trapezoidally tapering cross section upwards and an upper region 15c, which in turn is plate-shaped but with a shorter rectangular cross section is.
  • stiffening elements 8 and 9 are again provided here, which have been omitted from the drawing for reasons of clarity.
  • the formwork 11, like the formwork 1, can also be closed on its narrow sides.
  • the fastenings of the spacers 10 with the formwork walls 12 or 13 are loosened (when using wire, this is pinched off), so that the formwork walls 12 and 13 and possibly also the formwork walls not shown, covering the narrow sides can be removed after the concrete has hardened.
  • the formwork can easily be can also be designed as formwork for individual foundations. Due to the flexibility of the latticework, the cross-sectional shapes of the achievable foundation parts are essentially freely selectable, so that they can be adapted to the structural conditions and the calculations without a noticeably increased amount of work, as would be the case with conventional formwork. If necessary, a latticework that is only shrunk on one side with plastic film can be used if the expected corrosive loads allow it.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Mining & Mineral Resources (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Paleontology (AREA)
  • General Engineering & Computer Science (AREA)
  • Forms Removed On Construction Sites Or Auxiliary Members Thereof (AREA)
  • Polyesters Or Polycarbonates (AREA)
  • Glass Compositions (AREA)
  • Foundations (AREA)

Abstract

Known casings for foundation parts for spread foundations are of channel-shaped design with constant spacing of the side walls, although it is already known that foundation parts of this type can perfectly well be narrower at their top side than at their bottom side. However, since the labour cost of a casing of this type with a narrowing cross-section is relatively high, the foundation parts, in practice, have hitherto been produced with a constant cross-section even with the known casing and the additional concrete requirement has been accepted. It is therefore proposed to use a lattice (5) consolidated with plastic film (6) for the novel casing (l, 11). Due to the flexibility of this material, the labour required for a casing of a foundation part with reduced cross-section can be decidedly reduced. <IMAGE>

Description

Die Erfindung bezieht sich auf eine Schalung für Fundamentteile der im Oberbegriff von Anspruch 1 erläuterten Art.The invention relates to a formwork for foundation parts of the type explained in the preamble of claim 1.

Eine derartige Schalung ist aus der US-PS 3 730 475 bekannt. Die bekannte Schalung besteht aus Schalungswänden aus Vollkunststoff, die mit einer Mehrzahl über die Höhe der Schalungswände und quer über die Öffnung verlaufenden Versteifungsrippen miteinander verbunden sind. Die unteren freien Kanten der schalungswände können über einen Reibschluß ein Armierungsgitter tragen, das im Beton verbleibt. Zu diesem Zweck muß in das Amierungsgitter eine Ausnehmung eingeformt sein, die innerhalb enger Toleranzen genau auf die Dicke der Schalungswände abgestimmt ist. Da die Versteifungen in Höhenrichtung angeordnet und als eingeformte Rippen ausgebildet sind, wobei an der Schalungsinnenseite im Bereich der Rippen eine Vertiefung auftritt, müssen sich diese Versteifungen relativ eng nebeneinander befinden, wobei durch die sich über die obere Öffnung erstreckenden, relativ breiten Abstandshalter die Einfüllöffung für den Beton zumindest teilweise verdeckt wird. Ein nachträgliches Anordnen von zusätzlichen Versteifungselementen bzw. Abstandshaltern ist nur unter großen Schwierigkeiten möglich. Darüber hinaus ist die bekannte Schalung nur als wiederverwendbare Schalung brauchbar. Eine Anpassung der bekannten schalung an spezielle Gegebenheiten auf der Baustelle ist nicht möglich.Such formwork is known from US Pat. No. 3,730,475. The known formwork consists of formwork walls made of solid plastic, which are connected to each other by a plurality of stiffening ribs running across the height of the formwork walls and across the opening. The lower free edges of the formwork walls can support a reinforcement grid that remains in the concrete. For this purpose, a recess must be formed in the ammunition grid, which is precisely matched to the thickness of the formwork walls within narrow tolerances. Since the stiffeners are arranged in the vertical direction and are formed as molded-in ribs, with a depression occurring on the inside of the formwork in the area of the ribs, these stiffeners must be relatively close to one another, with the filler opening for through the relatively wide spacers extending over the upper opening the concrete is at least partially covered. Subsequent arrangement of additional stiffening elements or spacers is possible only with great difficulty. In addition, the known formwork can only be used as reusable formwork. It is not possible to adapt the known formwork to special conditions on the construction site.

Aus der DE-OS 34 36 690 ist eine Schalung bekannt, die aus einem U-förmig gebogenen Streifen aus einem mit Kunststoffolie beschrumpften Gitterwerk besteht und eine Rinne mit senkrechten Seitenwänden bildet, in die der Beton von oben her eingegossen wird. Der Querschnitt des fertigen Fundamentes ist somit über die gesamte Höhe des Fundamentteiles konstant, wobei die Breite des Querschnittes über die gesamte Höhe des Fundamentteiles der für die entsprechenden Bodenverhältnisse notwendigen Breite der Standfläche entspricht. Für die Wirksamkeit der Fundamentteile ist es jedoch nur notwendig, eine entsprechend große Standfläche zu haben, die die aufzunehmenden Lasten gleichmäßig im Boden verteilt. Demgegenüber muß die die Stützen oder die Wand aufnehmende Oberfläche des Fundamentteiles theoretisch nur so groß sein, daß Stützen oder Wand satt aufliegen können. Bei der Verwendung der vorbekannten Schalung wird somit wesentlich mehr Beton verbraucht als dies notwendig wäre.From DE-OS 34 36 690 a formwork is known which consists of a U-shaped strip from a latticework shrunk with plastic film and forms a channel with vertical side walls into which the concrete is poured from above. The cross-section of the finished foundation is thus constant over the entire height of the foundation part, the width of the cross-section over the entire height of the foundation part corresponding to the width of the standing area necessary for the corresponding floor conditions. For the effectiveness of the foundation parts, however, it is only necessary to have a correspondingly large footprint that distributes the loads to be evenly distributed in the floor. In contrast, the supports or the wall receiving surface of the foundation part must theoretically only be so large that supports or wall can lie snugly. When using the previously known formwork, much more concrete is used than would be necessary.

Der Erfindung liegt somit die Aufgabe zugrunde, eine Schalung der genannten Art bereitzustellen, die sowohl als verlorene als auch als wiederverwendbare Schalung konzipiert werden kann, die einfach und kostengünstig hergestellt und auf der Baustelle eingebaut werden kann, und die sich auf einfache Weise an spezielle Bedürfnisse auf der Baustelle anpassen läßt.The invention is therefore based on the object to provide a formwork of the type mentioned, which can be designed as both lost and reusable formwork, which can be easily and inexpensively manufactured and installed on site, and which can be easily adapted to special needs can be adjusted on site.

Die Aufgabe wird durch die kennzeichnenden Merkmale des Anspruchs 1 gelöst.The object is achieved by the characterizing features of claim 1.

Durch die erfindungsgemäße Verwendung eines Materials für die Schalungswände, das aus einer biegbaren Gittermatte und aufgeschrumpfter Kunststoffolie besteht, kann die Schalung unter Umständen noch auf der Baustelle den speziellen Bedürfnissen angepaßt werden. Die Schalung kann sowohl als verlorene Schalung als auch als wiederverwendbare Schalung ausgestaltet sein. Durch die Verwendung der speziellen Versteifungselemente und deren Anordnung entlang der Öffnung sowie die Verwendung wenigstens eines Abstandshalters wird sichergestellt, daß auch eine biegbare Schalungswandung mit dem beanspruchten, sich nach oben hin verjüngenden Querschnitt dem Betondruck standhalten kann. Da die Abstandshalter sowie die Versteifungselemente unter Durchstoßen der Kunststoffolie am Gitterwerk befestigt sind, können sie auch von außen leicht entfernt werden, falls dies gewünscht ist. Darüber hinaus ist die erfindungsgemäße Schalung wesentlich einfacher und kostengünstiger herstellbar als die bekannte Schalung mit gleicher Querschnittsform.Through the use according to the invention of a material for the formwork walls, which consists of a bendable mesh mat and shrunk-on plastic film, Under certain circumstances, the formwork can still be adapted to special needs on site. The formwork can be designed both as lost formwork and as reusable formwork. The use of the special stiffening elements and their arrangement along the opening as well as the use of at least one spacer ensures that even a flexible formwork wall with the claimed cross-section tapering upwards can withstand the concrete pressure. Since the spacers and the stiffening elements are attached to the latticework by piercing the plastic film, they can also be easily removed from the outside, if desired. In addition, the formwork according to the invention is much easier and cheaper to manufacture than the known formwork with the same cross-sectional shape.

Die Ansprüche 2 und 3 beschreiben die Anwendung der Erfindung auf eine verlorene (Anspruch 2) bzw. entfernbare und wiederverwertbare (Anspruch 3) Schalung.Claims 2 and 3 describe the application of the invention to a lost (claim 2) or removable and reusable (claim 3) formwork.

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

Fig. 1
eine perspektivische, schematische Darstellung eines ersten Ausführungsbeispieles der Erfindung,
Fig. 2
den Schnitt II-II aus Fig. 1, und
Fig. 3
einen Schnitt ähnlich Fig. 2 durch ein weiteres Ausführungsbeispiels der Erfindung.
Exemplary embodiments of the invention are explained in more detail below with reference to the drawings. Show it:
Fig. 1
2 shows a perspective, schematic representation of a first exemplary embodiment of the invention,
Fig. 2
the section II-II of Fig. 1, and
Fig. 3
a section similar to FIG. 2 through another embodiment the invention.

Aus Fig. 1 ist eine verlorene Schalung 1 zur Herstellung eines Streifenfundamentes ersichtlich, die als Rinne mit zwei die langen Begrenzungen der Rinne bildenden seitlichen Schalungswänden 2 und 3 und einem Schalungsboden 4 ausgebildet ist. Die seitlichen Schalungswände 2, 3 und der Schalungsboden 4 sind einstückig aus einem Streifen Verbundmaterial gebogen, das aus einem Gitterwerk 5 und einer beidseitig auf das Gitterwerk 5 aufgeschrumpften Kunststoffolie 6 besteht. Das Gitterwerk 5 ist bevorzugt eine der üblichen Baustahlmatten geeigneter Festigkeit mit gekreuzten Quer- bzw. Längsstäben 5a, 5b. Die Kunststoffolie 6 ist eine der üblichen Schrumpffolien geeigneter Festigkeit, wie sie beispielsweise auch für Verpackungszwecke eingesetzt werden können. Die Kunststoffolie 6 wurde in zwei Bahnen, 6a, 6b beidseitig auf das noch flache Gitterwerk 5 aufgelegt und unter Hitzeeinwirkung geschrumpft, so daß sie sich durch die damit verbundene Kontraktion eng um die Stäbe 5a bzw. 5b legt und beide Lagen 6a, 6b durch die Öffnungen des Gitterwerkes 5 hindurch miteinander verbunden werden. Danach wird das Gitterwerk 5 mit der aufgeschrumpften Kunststoffolie 6 zu dem gewünschten Profil gebogen.From Fig. 1 is a lost formwork 1 for production of a strip foundation can be seen, which is designed as a channel with two lateral formwork walls 2 and 3 forming the long boundaries of the channel and a formwork floor 4. The side formwork walls 2, 3 and the formwork floor 4 are integrally bent from a strip of composite material, which consists of a latticework 5 and a plastic film 6 shrunk onto the latticework 5 on both sides. The latticework 5 is preferably one of the usual structural steel mats of suitable strength with crossed transverse or longitudinal bars 5a, 5b. The plastic film 6 is one of the usual shrink films of suitable strength, as can also be used for packaging purposes, for example. The plastic film 6 was placed in two webs, 6a, 6b on both sides of the still flat latticework 5 and shrunk under the action of heat, so that it closes tightly around the rods 5a and 5b due to the associated contraction and both layers 6a, 6b through the Openings of the latticework 5 are connected to each other. Then the latticework 5 with the shrunk plastic film 6 is bent to the desired profile.

Im Ausführungsbeispiel nach den Fig. 1 und 2 wurde die Schalung derart gestaltet, daß das fertig vergossene Fundamentteil im unteren Bereich 7a plattenförmig mit einem langrechteckigen Querschnitt und im darüberliegenden oberen Bereich 7b mit einem sich nach oben verjüngenden, trapezförmigen Querschnitt versehen ist. Die Bodenbreite b₁ wird nach statischen Gesichtspunkten in Abhängigkeit auch von der Schalungslänge l festgelegt, während die verringerte obere Breite b₂ auf die notwendige Standfläche für die Stützen oder Wände abgestimmt ist.In the exemplary embodiment according to FIGS. 1 and 2, the formwork was designed in such a way that the completely cast foundation part is provided in the lower region 7a in the form of a plate with an elongated rectangular cross section and in the upper region 7b above it with a trapezoidal cross section tapering upwards. The floor width b 1 is determined according to static aspects depending on the formwork length l, while the reduced upper width b 2 is coordinated with the necessary footprint for the supports or walls.

Um den Widerstand der Schalung 1 gegen den Betondruck beim Vergießen zu erhöhen, sind in der Nähe der oberen Ränder der seitlichen Schalungswände 2 bzw. 3 Versteifungselemente 8 bzw. 9 angeordnet, die aus drei im Dreieck zusammengestellten geraden Längsstäben 8a bzw. 9a und gebogenen Längsstäben 8b, 9b bestehen, wobei die gebogenen Längsstäbe 8b, 9b jeweils zwei der geraden Längsstäbe 8a bzw. 9a miteinander verbinden. Dabei können jeweils nur zwei gebogene Längsstäbe 8b bzw. 9b pro Verstelfungselement 8 bzw. 9 vorgesehen sein. Die Versteifungselemente 8 bzw. 9 sind mit Hilfe eines Abstandshalters 10 an den Seitenwänden 2 bzw. 3 befestigt. Dabei durchstoßen die Abstandshalter 10 die Kunststoffolie 6 und umgreifen mit geeigneten, bekannten Verbindungsmitteln, im einfachsten Fall Rödeldraht, sowohl einen Quer- bzw. Längsstab 5a bzw. 5b des Gitterwerks als auch einen der Längsstäbe 8a bzw. 9a der Versteifungselemente 8 bzw. 9. Diese Abstandshalter 10 sorgen dafür, daß sowohl die Breite b₂ der oberen öffnung der Schalung 1 als auch der Abstand zwischen den Schalungswänden 2 bzw. 3 über die gesamte Höhe der Schalungswände im wesentlichen unverändert bleibt. Falls gewünscht, können die Schmalseiten der Schalung 1 mit geeigneten Materialstücken verschlossen werden. Dazu eignen sich sowohl übliche Schalungsbretter als auch ein entsprechend zugeschnittenes und befestigtes Stück des auch für die Schalung 1 verwendeten Materials aus mit Kunststoffolie beschrumpftem Gitterwerk.In order to increase the resistance of the formwork 1 to the concrete pressure during pouring, stiffening elements 8 and 9 are arranged in the vicinity of the upper edges of the side formwork walls 2 and 3, which consist of three straight longitudinal rods 8a and 9a assembled in a triangle and curved longitudinal rods 8b, 9b exist, the curved longitudinal bars 8b, 9b each connecting two of the straight longitudinal bars 8a and 9a. In this case, only two curved longitudinal bars 8b and 9b can be provided per stiffening element 8 and 9, respectively. The stiffening elements 8 and 9 are fastened to the side walls 2 and 3 with the aid of a spacer 10. The spacers 10 penetrate the plastic film 6 and encompass both a transverse or longitudinal rod 5a or 5b of the lattice work and one of the longitudinal rods 8a or 9a of the stiffening elements 8 or 9 using suitable, known connecting means, in the simplest case, wire wire. These spacers 10 ensure that both the width b₂ of the upper opening of the formwork 1 and the distance between the formwork walls 2 and 3 remain essentially unchanged over the entire height of the formwork walls. If desired, the narrow sides of the formwork 1 can be closed with suitable pieces of material. Both conventional formwork boards and a correspondingly cut and fastened piece of the material also used for the formwork 1 made of lattice work shrunk with plastic film are suitable for this purpose.

Fig. 3 zeigt einen Schnitt ähnlich Fig. 2 durch ein weiteres Ausführungsbeispiel der Erfindung in Form einer wiederverwendbaren Schalung 11. Die Schalung 11 besteht aus mindestens zwei sich gegenüberliegenden Schalungswänden 12 bzw. 13, die aus je einem zugeschnittenen Streifen des bereits für die Schalung 1 verwendeten, mit Kunststoffolie 6 beschrumpften Gitterwerks 5 bestehen. Danach wurden die beiden seitlichen Schalungswände 12 bzw. 13 stufenförmig gebogen und mittels der bereits beschriebenen Abstandshalter 10 spiegelblldlich und im vorbestimmten Abstand in Parallellage zueinander fixiert und auf eine Betonierunterlage 14 aufgestellt. Die größte Breite b₁ der Schalung 11, die Breite der Bodenfläche, wird wiederum auf die statischen Gegebenheiten abgestellt, während die Breite b₂ an der Oberseite der Schalung 11 der erforderlichen Standfläche für Stützen bzw. Wände angepaßt ist. Der Querschnitt des mit der Schalung 11 hergestellten Fundamentteiles weist somit einen plattenförmigen unteren Bereich 15a mit einem langrechteckigen Querschnitt, einen mittleren Bereich 15b mit einem sich trapezförmig nach oben verjüngenden Querschnitt und einen oberen Bereich 15c auf, der wiederum plattenförmig aber mit einem kürzeren rechteckigen Querschnitt ausgebildet ist. Selbstverständlich sind auch hier wiederum Versteifungselemente 8 bzw. 9 vorgesehen, die jedoch aus Gründen der Übersichtlichkeit in der Zeichnung weggelassen wurden. Auch die Schalung 11 kann wie die Schalung 1 an ihren Schmalseiten verschlossen werden. Soll die Schalung entfernt werden, so werden die Befestigungen der Abstandshalter 10 mit den Schalungswänden 12 bzw. 13 gelöst (bei Verwendung von Rödeldraht wird dieser abgezwickt), so daß die Schalungswände 12 bzw. 13 und gegebenenfalls auch die die Schmalseiten bedeckenden, nicht gezeichneten Schalungswände nach dem Aushärten des Betons entfernt werden können.3 shows a section similar to FIG. 2 through a further exemplary embodiment of the invention in the form of a reusable formwork 11. The formwork 11 consists of at least two opposing formwork walls 12 and 13, each of which is made from a cut strip of the formwork already used for the formwork 1 used, shrunk with plastic film 6 latticework 5 exist. The two side formwork walls 12 and 13 were then bent in steps and fixed in a mirror-image manner using the spacers 10 already described and at a predetermined distance in parallel position to one another and placed on a concrete base 14. The greatest width b₁ of the formwork 11, the width of the floor area, is in turn based on the static conditions, while the width b₂ on the top of the formwork 11 is adapted to the required footprint for supports or walls. The cross section of the foundation part produced with the formwork 11 thus has a plate-shaped lower region 15a with an elongated rectangular cross section, a central region 15b with a trapezoidally tapering cross section upwards and an upper region 15c, which in turn is plate-shaped but with a shorter rectangular cross section is. Of course, stiffening elements 8 and 9 are again provided here, which have been omitted from the drawing for reasons of clarity. The formwork 11, like the formwork 1, can also be closed on its narrow sides. If the formwork is to be removed, the fastenings of the spacers 10 with the formwork walls 12 or 13 are loosened (when using wire, this is pinched off), so that the formwork walls 12 and 13 and possibly also the formwork walls not shown, covering the narrow sides can be removed after the concrete has hardened.

In Abwandlung der beschriebenen und gezeichneten Ausführungsbeispiele können die Schalungen ohne weiteres auch als Schalungen für Einzelfundamente ausgebildet werden. Durch die Biegbarkeit des Gitterwerkes sind darüber hinaus die Querschnittsformen der erzielbaren Fundamentteile im wesentlichen frei wählbar, so daß sie jeweils an die baulichen Gegebenheiten und die Berechnungen angepaßt werden können, ohne daß ein merklich erhöhter Arbeitsaufwand anfällt, wie dies bei herkömmlichen Schalungen der Fall wäre. Notfalls kann auch ein nur einseitig mit Kunststoffolie beschrumpftes Gitterwerk verwendet werden, wenn es die zu erwartenden korrosiven Belastungen zulassen.In a modification of the described and drawn exemplary embodiments, the formwork can easily be can also be designed as formwork for individual foundations. Due to the flexibility of the latticework, the cross-sectional shapes of the achievable foundation parts are essentially freely selectable, so that they can be adapted to the structural conditions and the calculations without a noticeably increased amount of work, as would be the case with conventional formwork. If necessary, a latticework that is only shrunk on one side with plastic film can be used if the expected corrosive loads allow it.

Claims (3)

  1. Formwork (1, 11) for foundation parts, having lateral formwork walls (2, 3, 12, 13) enclosing an upwardly tapering cross-section (7a, 7b, 15a, 15b, 15c) with an upper opening, at least one spacer (10) and a stiffener (8, 9), characterised in that the formwork walls (2, 3, 12, 13) consist of a flexible mesh structure (5) shrink-coated with plastics film (6) and the stiffener contains two stiffening elements disposed on both sides along the opening and made of longitudinal bars (8a, 9a) connected together by transverse bars (8b, 9b) and fixed to the spacer (10) extending traversely through the interior of the formwork (1, 11) while penetrating the plastics film (6).
  2. Formwork according to Claim 1, characterised in that at least two mutually opposite formwork walls (2, 3) are integrally connected together by a formwork base (4).
  3. Formwork according to Claim 1, characterised in that the formwork walls (12, 13) consist of at least two mutually opposite strips of the mesh structure (5) shrink-coated with plastics film (6) which are held at a predertermined distance by spacers (10).
EP89107678A 1988-05-09 1989-04-27 Casing Expired - Lifetime EP0341507B1 (en)

Priority Applications (1)

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AT89107678T ATE88229T1 (en) 1988-05-09 1989-04-27 FORMWORK.

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DE3815870 1988-05-09
DE3815870A DE3815870C1 (en) 1988-05-09 1988-05-09

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EP0341507A2 EP0341507A2 (en) 1989-11-15
EP0341507A3 EP0341507A3 (en) 1990-05-30
EP0341507B1 true EP0341507B1 (en) 1993-04-14

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DE9111725U1 (en) * 1991-09-19 1993-01-28 Fischer, Willibald, 8312 Dingolfing, De
DE9206140U1 (en) * 1992-05-07 1993-09-09 Peca Verbundtechnik formwork
GB9309948D0 (en) * 1993-05-14 1993-06-30 Macdonald Alex Improved kerb
GB0613534D0 (en) * 2006-07-07 2006-08-16 Bridge Iain N Improvements in or relating to barrier construction
DE202007005409U1 (en) 2007-04-13 2008-08-14 Obernolte, Sven An element
DE202007009044U1 (en) 2007-06-27 2008-11-06 Obernolte, Sven An element
DE202007008977U1 (en) 2007-06-27 2008-10-30 Reent Obernolte Gmbh & Co. Kg An element
DE202007005701U1 (en) 2007-04-19 2008-09-04 Obernolte, Sven An element
DE202007008976U1 (en) 2007-06-27 2008-10-30 Obernolte, Sven An element
EP2103758A1 (en) 2008-03-18 2009-09-23 Sven Obernolte Forming board
DE102013111056A1 (en) * 2013-10-07 2015-04-09 Peca - Verbundtechnik Gmbh An element
DK3312359T3 (en) * 2016-10-19 2020-01-27 Beotek Oy The mold element
DE102018124773A1 (en) * 2018-10-08 2020-04-09 Protektorwerk Florenz Maisch Gmbh & Co. Kg Stand profile
GB2616437A (en) * 2022-03-08 2023-09-13 Abbey Pynford Holdings Ltd Shuttering system

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US3730475A (en) * 1970-09-23 1973-05-01 L Werfel Form for casting concrete building foundation
NL8303866A (en) * 1983-11-10 1985-06-03 Grad Heinz Carl Ing LOST FORMWORK.

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DE3815870C1 (en) 1989-08-03
EP0341507A3 (en) 1990-05-30
ES2039741T3 (en) 1993-10-01
EP0341507A2 (en) 1989-11-15
DE58904040D1 (en) 1993-05-19
ATE88229T1 (en) 1993-04-15

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