EP0458778A1 - Tubular reusable and inflatable moulding form of elastic material - Google Patents
Tubular reusable and inflatable moulding form of elastic material Download PDFInfo
- Publication number
- EP0458778A1 EP0458778A1 EP91890110A EP91890110A EP0458778A1 EP 0458778 A1 EP0458778 A1 EP 0458778A1 EP 91890110 A EP91890110 A EP 91890110A EP 91890110 A EP91890110 A EP 91890110A EP 0458778 A1 EP0458778 A1 EP 0458778A1
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- Prior art keywords
- formwork
- inflated
- hollow body
- cavities
- substantially cylindrical
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- 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
- E04G11/04—Forms, shutterings, or falsework for making walls, floors, ceilings, or roofs for structures of spherical, spheroid or similar shape, or for cupola structures of circular or polygonal horizontal or vertical section; Inflatable forms
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- 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
- E04G11/04—Forms, shutterings, or falsework for making walls, floors, ceilings, or roofs for structures of spherical, spheroid or similar shape, or for cupola structures of circular or polygonal horizontal or vertical section; Inflatable forms
- E04G11/045—Inflatable forms
Definitions
- the invention relates to a reusable, inflatable, tubular formwork hollow body made of elastic material, which in the inflated state has an essentially egg-shaped cross-section and can be placed on a channel-shaped soleplate, with an outer formwork skin and with inner walls that the inflated formwork hollow body over its entire length in one subdivide a substantially cylindrical and smaller upper cavity and a substantially cylindrical and smaller lower cavity and two lateral, essentially equally large and prismatic cavities, the cavities adjoining each other in pairs along the outline of the formwork cross-section and all cavities forming at least two separate pressure chambers, each over a valve arranged at one end of the formwork hollow body can be filled.
- the pressure chamber formed by the upper and lower cavity is only inflated to such an extent that the filling of the space surrounding the formwork hollow body is filled with filling concrete does not lead to any deformation of the formwork cross-section in the area of the upper cavity.
- the internal pressure in the lower cavity is not large enough to press the inflated formwork hollow body against the channel-shaped base plate sufficiently firmly to prevent concrete from penetrating between the base plate and the formwork hollow body. The concrete that has penetrated there must be removed after extensive demoulding.
- inflatable formwork hollow bodies made of flexible material are also known for producing monolithic concrete structures outdoors.
- formwork hollow bodies are supported with their underside, which is not designed as a formlining, on the level floor or foundation on which they rest and on which they are anchored, and only form a formwork for the concrete structure to be erected with their curved top the concrete is sprayed on from the outside.
- formwork hollow bodies it is known, for example from SU-1315584-A1, that the formlining, which is arranged above the floor of the building to be erected, anchored to the building foundation and sealed to the outside by an annular container, is used to inflate pipes through the floor with air and to spray concrete onto the inflated hollow formwork.
- the annular container is filled with water.
- such a hollow formwork body that is open at the bottom and is supported on the floor can be subdivided into an upper closed pressure chamber and a lower pressure chamber that is open to the floor by a membrane attached to the top of the annular container.
- the necessary air lines are first laid in the floor of the building to be erected, the annular container and the upper pressure chamber are inflated and the concrete is applied to the inflated formwork skin.
- the pressure in the annular container is increased and a negative pressure is generated in the pressure chamber which is open towards the bottom.
- AT-PS 359 733 Another such downwardly open, ground-supported, inflatable formwork hollow body is known from AT-PS 359 733, which differs from that of SU-1399517-A1 practically only in that anchoring the formwork skin to the building foundation and on the Use of the chamber open at the bottom on the underside of the hollow formwork is dispensed with.
- AT-PS 359 733 a mutual stabilization is achieved by a higher pressure in the ring-shaped container compared to the pressure chamber delimited by the formwork skin, which makes further anchoring of the formwork hollow body unnecessary.
- All these inflatable formwork hollow bodies for the erection of monolithic concrete buildings have in common that when they are inflated they each form a one-sided effective formwork body that has a bottom that cannot be used as formwork, which must be placed on a flat surface to support the formwork body. They also differ from the inflatable formwork hollow bodies to be used for pipe formwork in that the respective The ring-shaped container that comes to rest on the flat surface runs along the lower edge of the formwork skin and, with its cross-sectional shape, has no influence on the cross-sectional shape of the hollow formwork body.
- a formwork for elongated, large-nave buildings with a vault which consists of a foundation plate with upstanding struts and a tubular inflatable formwork hollow body, which is supported on the foundation plate and is arranged between the struts, for the vaulted ceiling of the building.
- This formwork hollow body consists of an outer soft steering arm, which is anchored on the foundation plate, and an inflatable torus, which is located inside the steering arm and, when inflated, is displaced within the steering arm to where concreting begins, as well as to the Side surfaces of the steering arm attached removable and inflatable balloons.
- the object of the invention is to eliminate the disadvantages shown in the case of tubular formwork hollow bodies for pipes, ducts or the like.
- both cylindrical cavities can each be designed as a separate pressure chamber that can be inflated via a valve.
- the pressure in the upper cylindrical cavity can be chosen to minimize the risk of damage to the formwork facing, while the pressure in the lower cylindrical cavity ensures optimum sealing of the facing the soleplate is chosen.
- the separation of the two cylindrical cavities also makes it easier to find leaks in the formlining caused by damage.
- An inflatable formwork hollow body consists of an outer tubular formwork skin 1 which extends essentially over the entire length of the formwork hollow body. Inside the formlining 1 are provided over the entire length of the formwork hollow body down to the end portions of the inner walls 2,3,4,5, which each pair and together with a longitudinal strip 6,7,8,9 of the formwork 1 each one over limit the entire length of the cavity hollow body 10,11,12,13.
- the substantially egg-shaped cross-section of the formwork hollow body in the inflated state is characterized by an essentially cylindrical upper cavity 10, which is delimited by the longitudinal strip 6 and the two inner walls 2 and 3, an essentially cylindrical lower, smaller cavity 12, which is formed by longitudinal formwork strips 8 and the two Inner walls 4 and 5 is limited, and formed by the two lateral substantially identical prismatic cavities 11 and 13, which are delimited by the formwork longitudinal strip 7 and the two inner walls 2 and 4 or by the formwork longitudinal strip 9 and the two inner walls 3 and 5.
- the upper cavity 10 has a larger cross-sectional area than the lower cavity 12.
- Each of the two cavities 10 and 12 forms a pressure chamber which is separate from the other and which is in each case inflated via a valve arranged in the end section of the formwork hollow body.
- the pressure chamber of the lower cavity 12, the outer formwork strip 8 of which lies against the sole plate 14, is inflated to a higher pressure than the pressure chamber of the upper cavity 10.
- the two lateral cavities 11 and 13 are interconnected and are inflated via only one further valve arranged in the end section of the formwork hollow body. If desired, the two lateral cavities 11 and 13 can each form their own pressure chambers which can be inflated via their own valve.
- the inner walls 2, 3, 4, 5 can be formed as separate sheets of elastic material, or can be formed from parts of hoses enveloping the upper cavity 10 or the lower cavity 12, which in turn are encased by the tubular formlining 1.
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Mechanical Engineering (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Laminated Bodies (AREA)
- Moulds, Cores, Or Mandrels (AREA)
- Vibration Dampers (AREA)
- Forms Removed On Construction Sites Or Auxiliary Members Thereof (AREA)
- Catching Or Destruction (AREA)
- Pipe Accessories (AREA)
- Orthopedics, Nursing, And Contraception (AREA)
- Tents Or Canopies (AREA)
- Footwear And Its Accessory, Manufacturing Method And Apparatuses (AREA)
Abstract
Description
Die Erfindung betrifft einen wiederverwendbaren, aufblasbaren, schlauchförmigen Schalungshohlkörper aus elastischem Material, welcher im aufgeblasenen Zustand einen im wesentlichen eiförmigen Querschnitt besitzt und auf eine rinnenförmige Sohlplatte aufsetzbar ist, mit einer außenliegenden Schalhaut und mit Innenwänden, die den aufgeblasenen Schalungshohlkörper über seine ganze Länge in einen im wesentlichen zylindrischen und größeren oberen Hohlraum einen im wesentlichen zylindrischen und kleineren unteren Hohlraum und zwei seitliche, im wesentlichen gleich große und prismatische Hohlräume unterteilen, wobei die Hohlräume entlang dem Umriß des Schalkörperquerschnittes paarweise aneinandergrenzen und alle Hohlräume zumindest zwei getrennte Druckkammern bilden, die jeweils über ein an einem Ende des Schalungshohlkörpers angeordnetes Ventil füllbar sind.The invention relates to a reusable, inflatable, tubular formwork hollow body made of elastic material, which in the inflated state has an essentially egg-shaped cross-section and can be placed on a channel-shaped soleplate, with an outer formwork skin and with inner walls that the inflated formwork hollow body over its entire length in one subdivide a substantially cylindrical and smaller upper cavity and a substantially cylindrical and smaller lower cavity and two lateral, essentially equally large and prismatic cavities, the cavities adjoining each other in pairs along the outline of the formwork cross-section and all cavities forming at least two separate pressure chambers, each over a valve arranged at one end of the formwork hollow body can be filled.
Bei bekannten Schalungshohlkörpern dieser Art, wie sie für die Herstellung von Rohrleitungen oder Kanälen mit eiförmigem Querschnitt in Ortsbeton verwendet werden, sind der obere und der untere Hohlraum über eine oder mehrere Öffnungen in der beide voneinander trennenden Innenwand zu einer einzigen Druckkammer mit gleichem Innendruck verbunden, während die beiden seitlichen Hohlräume untereinander zur zweiten Druckkammer verbunden sind. Beim praktischen Einsatz solcher Schalungshohlkörper hat sich gezeigt, daß es im Bereich seiner prismatischen Hohlräume sehr leicht zu Deformationen beim Verfüllen, Rütteln des Füllbetones kommt, weshalb der Innendruck sehr genau abgewogen werden muß, um die Formgenauigkeit der Querschnittskontur des aufgeblasenen Schalungshohlkörpers sicherzustellen. Um diese Querschnittskontur zu stabilisieren und dadurch eine unpräzisere und rauhere Handhabung des Schalungshohlkörpers auszugleichen, ist es bekannt dem oberen und dem unteren Hohlraum statt einem kreisförmigen Querschnitt einen kreissegmentförmigen Querschnitt zu versehen und die die beiden Hohlräume miteinander verbindenden Öffnungen in die, die beiden Hohlräume trennende, ebene Innenwand des Schalungshohlkörpers zu verlegen. Dies führt zwar zu einer Stabilisierung des Querschnittes des Schalungshohlkörpers, beseitigt aber einen anderen sich aus der Eiform ergebenden Nachteil der bekannten schlauchförmigen Schalungshohlkörper nicht. Um eine Beschädigungsgefahr der Schalhaut in dem vom oberen Hohlraum gebildeten, zufolge des größeren Durchmessers stärker gefährdeten Bereich des Schalungshohlkörpers so gering wie möglich zu halten, wird die vom oberen und unteren Hohlraum gebildete Druckkammer nur so weit aufgeblasen, daß das Verfüllen des den Schalungshohlkörpers umgehenden Raumes mit Füllbeton zu keiner Verformung des Schalungskörperquerschnittes im Bereich des oberen Hohlraumes führt. Dabei ist der Innendruck im unteren Hohlraum aber nicht groß genug, um den aufgeblasenen Schalungshohlkörper im Bereich der rinnenförmigen Sohlplatte ausreichend fest gegen diese zu drücken, um in allen Fällen ein Eindringen von Beton zwischen Sohlplatte und Schalungshohlkörper zu verhindern. Der dort eingedrungene Beton muß nach dem Entschalen durch aufwendige Nacharbeiten entfernt werden.In known formwork hollow bodies of this type, such as are used for the production of pipelines or ducts with an egg-shaped cross section in in-situ concrete, the upper and lower cavities are connected via one or more openings in the inner wall separating them from one another to form a single pressure chamber with the same internal pressure, while the two lateral cavities are interconnected to form the second pressure chamber. In the practical use of such formwork hollow bodies, it has been shown that deformations in the area of its prismatic cavities occur very easily when filling, shaking the filling concrete, which is why the internal pressure must be carefully weighed to ensure the shape accuracy of the cross-sectional contour of the inflated hollow formwork body. In order to stabilize this cross-sectional contour and thereby compensate for less precise and rougher handling of the formwork hollow body, it is known to provide the upper and lower cavities with a circular segment-shaped cross-section instead of a circular cross-section and the openings connecting the two cavities into the to lay the flat inner wall of the hollow formwork separating the two cavities. Although this leads to a stabilization of the cross-section of the hollow formwork body, it does not eliminate another disadvantage of the known tubular hollow formwork body resulting from the egg shape. In order to minimize the risk of damage to the formwork skin in the area of the formwork hollow body formed by the upper cavity, which is more at risk due to the larger diameter, the pressure chamber formed by the upper and lower cavity is only inflated to such an extent that the filling of the space surrounding the formwork hollow body is filled with filling concrete does not lead to any deformation of the formwork cross-section in the area of the upper cavity. However, the internal pressure in the lower cavity is not large enough to press the inflated formwork hollow body against the channel-shaped base plate sufficiently firmly to prevent concrete from penetrating between the base plate and the formwork hollow body. The concrete that has penetrated there must be removed after extensive demoulding.
Neben den rundum von einer Schalhaut umhüllten schlauchförmigen aufblasbaren Schalungshohlkörpern, wie sie zum Aussparen des Rohrleitungsquerschnittes in einer Künette, in der Beton eingefüllt und durch Rütteln verdichtet wird, verwendet werden, sind auch aufblasbare Schalungshohlkörper aus flexiblem Material zum Herstellen von monolithischen Betonbauten im Freien bekannt.In addition to the tubular inflatable formwork hollow bodies encased by a formwork shell, such as are used to cut out the pipe cross-section in a cradle in which concrete is filled and compacted by shaking, inflatable formwork hollow bodies made of flexible material are also known for producing monolithic concrete structures outdoors.
Diese Schalungshohlkörper stützen sich mit ihrer Unterseite, die nicht als Schalhaut ausgebildet ist, auf dem ebenen Boden oder Fundament, auf dem sie aufliegen und an dem sie verankert sind, ab und bilden nur mit ihrer gewölbten Oberseite eine Verschalung für den zu errichtenden Betonbau, auf die der Beton von außen aufgespritzt wird. Bei solchen Schalungshohlkörpern ist es beispielsweise aus SU-1315584-A1 bekannt, die über dem Boden des zu errichtenden Gebäudes angeordnete, am Gebäudefundament verankerte und am unteren Rand mittels eines ringförmigen Behälters nach außen abgedichtete Schalhaut über durch den Boden geführte Leitungen mit Luft aufzublasen und Beton auf den aufgeblasenen Schalungshohlkörper aufzuspritzen. Um während des Erhärtens des Betons eine Deformierung der aufgeblasenen Schalhaut durch Windeinwirkung zu verhindern ist der ringförmige Behälter mit Wasser gefüllt. Ein solcher nach unten offener, sich am Boden abstützender Schalungshohlkörper kann gemäß SU-1399517-A1 durch eine auf der Oberseite des ringförmigen Behälters befestigte Membrane in eine obere geschlossene Druckkammer und eine untere zum Boden hin offene Druckkammer unterteilt sein. Bei dieser Konstruktion werden zuerst die erforderlichen Luftleitungen im Boden des zu errichtenden Gebäudes verlegt der ringförmige Behälter und die obere Druckkammer aufgeblasen und der Beton auf die aufgeblasene Schalhaut aufgebracht. Zur Aufrechterhaltung der Stabilität der Schalhaut bei Windeinflüssen während des Aushärtens des Betons wird der Druck im ringförmigen Behälter erhöht und in der zum Boden hin offenen Druckkammer ein Unterdruck erzeugt.These formwork hollow bodies are supported with their underside, which is not designed as a formlining, on the level floor or foundation on which they rest and on which they are anchored, and only form a formwork for the concrete structure to be erected with their curved top the concrete is sprayed on from the outside. In such formwork hollow bodies, it is known, for example from SU-1315584-A1, that the formlining, which is arranged above the floor of the building to be erected, anchored to the building foundation and sealed to the outside by an annular container, is used to inflate pipes through the floor with air and to spray concrete onto the inflated hollow formwork. In order to prevent the inflated formwork skin from deforming due to the effects of wind while the concrete is hardening, the annular container is filled with water. According to SU-1399517-A1, such a hollow formwork body that is open at the bottom and is supported on the floor can be subdivided into an upper closed pressure chamber and a lower pressure chamber that is open to the floor by a membrane attached to the top of the annular container. With this construction, the necessary air lines are first laid in the floor of the building to be erected, the annular container and the upper pressure chamber are inflated and the concrete is applied to the inflated formwork skin. In order to maintain the stability of the formwork skin in the event of wind during the hardening of the concrete, the pressure in the annular container is increased and a negative pressure is generated in the pressure chamber which is open towards the bottom.
Ein weiterer solcher nach unten offener, sich am Boden abstützender, aufblasbarer Schalungshohlkörper ist aus der AT-PS 359 733 bekannt, welcher sich von jenem der SU-1399517-A1 praktisch nur dadurch unterscheidet, daß auf eine Verankerung der Schalhaut am Gebäudefundament und auf die Nutzung der nach unten offenen Kammer auf der Unterseite des Schalungshohlkörpers verzichtet wird. Gemäß der AT-PS 359 733 wird durch einen höheren Druck im ringförmigen Behälter gegenüber der von der Schalhaut nach oben begrenzten Druckkammer eine gegenseitige Stabilisierung erreicht, die eine weitere Bodenverankerung des Schalungshohlkörpers unnötig macht.Another such downwardly open, ground-supported, inflatable formwork hollow body is known from AT-PS 359 733, which differs from that of SU-1399517-A1 practically only in that anchoring the formwork skin to the building foundation and on the Use of the chamber open at the bottom on the underside of the hollow formwork is dispensed with. According to AT-PS 359 733 a mutual stabilization is achieved by a higher pressure in the ring-shaped container compared to the pressure chamber delimited by the formwork skin, which makes further anchoring of the formwork hollow body unnecessary.
All diesen aufblasbaren Schalungshohlkörpern für die Errichtung monolithischer Betonbauten ist gemeinsam, daß sie im aufgeblasenen Zustand jeweils einen nur einseitig wirksamen Schalkörper bilden, der eine nicht als Schalung verwendbare Unterseite besitzt, welche zur Abstützung des Schalkörpers auf eine ebene Unterlage aufgesetzt werden muß. Von den für Rohrschalungen zu verwendenden aufblasbaren Schalungshohlkörpern unterscheiden sie sich weiters dadurch, daß der jeweils am ebenen Untergrund zur Auflage kommende ringförmige Behälter entlang dem unteren Rand der Schalhaut verläuft und mit seiner Querschnittsform keinen Einfluß auf die Querschnittsform des Schalungshohlkörpers hat.All these inflatable formwork hollow bodies for the erection of monolithic concrete buildings have in common that when they are inflated they each form a one-sided effective formwork body that has a bottom that cannot be used as formwork, which must be placed on a flat surface to support the formwork body. They also differ from the inflatable formwork hollow bodies to be used for pipe formwork in that the respective The ring-shaped container that comes to rest on the flat surface runs along the lower edge of the formwork skin and, with its cross-sectional shape, has no influence on the cross-sectional shape of the hollow formwork body.
Aus SU-1206419-A ist eine Schalung für langgestreckte, großschiffige Bauten mit Gewölbe bekannt, welche aus einer Fundamentplatte mit aufragenden Streben und einem sich auf der Fundamentplatte abstützenden zwischen den Streben angeordneten schlauchförmigen aufblasbaren Schalungshohlkörper für die gewölbte Decke des Gebäudes besteht. Dieser Schalungshohlkörper besteht aus einem äußeren weichen Lenkarm, der auf der Fundamentplatte verankert wird, und aus einem im Inneren des Lenkarmes angeordneten, aufblasbaren Torus, der im aufgeblasenen Zustand innerhalb des Lenkarmes dorthin verlagert wird, wo mit dem Betonieren begonnen wird, sowie aus an den Seitenflächen des Lenkarmes befestigten abnehmbaren und aufblasbaren Ballons.From SU-1206419-A, a formwork for elongated, large-nave buildings with a vault is known, which consists of a foundation plate with upstanding struts and a tubular inflatable formwork hollow body, which is supported on the foundation plate and is arranged between the struts, for the vaulted ceiling of the building. This formwork hollow body consists of an outer soft steering arm, which is anchored on the foundation plate, and an inflatable torus, which is located inside the steering arm and, when inflated, is displaced within the steering arm to where concreting begins, as well as to the Side surfaces of the steering arm attached removable and inflatable balloons.
Aufgabe der Erfindung ist es die aufgezeigten Nachteile bei schlauchförmigen Schalungshohlkörpern für Rohrleitungen, Kanäle oder dergleichen zu beseitigen.The object of the invention is to eliminate the disadvantages shown in the case of tubular formwork hollow bodies for pipes, ducts or the like.
Dies wird ausgehend von einem Schalungshohlkörper der eingangs genannten Art erfindungsgemäß dadurch erreicht, daß von den beiden im wesentlichen zylindrischen Hohlräumen zumindest der untere Hohlraum als eine eigene, über ein Ventil aufblasbare Druckkammer ausgebildet ist. Durch diese Ausbildung kann im unteren Hohlraum der Druck so weit erhöht werden, daß die äußere Schalhaut entlang der rinnenförmigen Sohlplatte dichtend an dieser anliegt, während der Druck im oberen Hohlraum und in den beiden seitlichen Hohlräumen unabhängig davon gewählt werden kann, ohne die Umrißgestalt des Schalkörperquerschnittes zu verändern.This is achieved on the basis of a formwork hollow body of the type mentioned at the outset in that at least the lower cavity of the two essentially cylindrical cavities is designed as a separate pressure chamber which can be inflated via a valve. With this design, the pressure in the lower cavity can be increased to such an extent that the outer formlining lies sealingly against the groove-shaped base plate, while the pressure in the upper cavity and in the two lateral cavities can be selected independently of this, without the outline shape of the formwork cross section to change.
Gemäß einem weiteren Merkmal der Erfindung können beide zylindrischen Hohlräume jeweils als eine eigene, über ein Ventil aufblasbare Druckkammer ausgebildet sein. Bei dieser Ausbildung kann der Druck in dem oberen zylindrischen Hohlraum auf eine möglichst geringe Gefahr der Beschädigung der Schalhaut gewählt werden, während der Druck im unteren zylindrischen Hohlraum für eine optimale Adichtung der Schalhaut gegenüber der Sohlplatte gewählt wird. Durch die Trennung der beiden zylindrischen Hohlräume wird auch das Auffinden von durch Beschädigungen hervorgerufenen undichten Stellen in der Schalhaut erleichtert.According to a further feature of the invention, both cylindrical cavities can each be designed as a separate pressure chamber that can be inflated via a valve. With this design, the pressure in the upper cylindrical cavity can be chosen to minimize the risk of damage to the formwork facing, while the pressure in the lower cylindrical cavity ensures optimum sealing of the facing the soleplate is chosen. The separation of the two cylindrical cavities also makes it easier to find leaks in the formlining caused by damage.
Nachstehend wird die Erfindung an einem Ausführungsbeispiel anhand der Zeichnung, die einen Querschnitt durch einen aufgeblasenen erfindungsgemäßen Schalungshohlkörper zeigt, näher erläutert.The invention is explained in more detail below using an exemplary embodiment with reference to the drawing, which shows a cross section through an inflated formwork hollow body according to the invention.
Ein erfindungsgemäßer aufblasbarer Schalungshohlkörper besteht aus einer äußeren schlauchförmigen Schalhaut 1, die sich im wesentlichen über die gesamte Länge des Schalungshohlkörpers erstreckt. Im Inneren der Schalhaut 1 sind sich über die gesamte Länge des Schalungshohlkörpers bis in dessen Endabschnitte verlaufende Innenwände 2,3,4,5 vorgesehen, welche jeweils paarweise und zusammen mit einem Längsstreifen 6,7,8,9 der Schalhaut 1 je einen sich über die gesamte Länge des Schalungshohlkörpers erstreckenden Hohlraum 10,11,12,13 begrenzen. Der im aufgeblasenen Zustand im wesentlichen eiförmige Querschnitt des Schalungshohlkörpers wird von einem im wesentlichen zylindrischen oberen Hohlraum 10, welcher vom Längsstreifen 6 und den beiden Innenwänden 2 und 3 begrenzt ist, einem im wesentlichen zylindrischen unteren kleineren Hohlraum 12, welcher von Schalhautlängsstreifen 8 und den beiden Innenwänden 4 und 5 begrenzt ist, und von den beiden seitlichen im wesentlichen gleichgroßen prismatischen Hohlräumen 11 und 13 gebildet, welche vom Schalhautlängsstreifen 7 und den beiden Innenwänden 2 und 4 bzw. vom Schalhautlängsstreifen 9 und den beiden Innenwänden 3 und 5 begrenzt sind.An inflatable formwork hollow body according to the invention consists of an outer
Der obere Hohlraum 10 besitzt eine größere Querschnittsfläche als der untere Hohlraum 12. Jeder der beiden Hohlräume 10 und 12 bildet eine vom anderen getrennte Druckkammer, welche jeweils über ein, im Endabschnitt des Schalungshohlkörpers angeordnetes Ventil aufgeblasen wird. Die Druckkammer des unteren Hohlraumes 12, dessen außenliegender Schalhautstreifen 8 an der Sohlplatte 14 anliegt, wird auf einen höheren Druck aufgeblasen als die Druckkammer des oberen Hohlraumes 10.The
Die beiden seitlichen Hohlräume 11 und 13 sind untereinander verbunden und werden über nur ein weiteres im Endabschnitt des Schalungshohlkörpers angeordnetes Ventil aufgeblasen. Falls gewünscht können auch die beiden seitlichen Hohlräume 11 und 13 jeweils eigene über ein eigenes Ventil aufblasbare Druckkammern bilden.The two
Die Innenwände 2,3,4,5 können als eigene Bahnen aus elastischem Material ausgebildet sein, oder von Teilen von den oberen Hohlraum 10 bzw. den unteren Hohlraum 12 umhüllenden Schläuchen gebildet sein, die ihrerseits von der schlauchförmigen Schalhaut 1 umhüllt sind.The
Claims (2)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AT0112590A AT396157B (en) | 1990-05-21 | 1990-05-21 | REUSABLE, INFLATABLE, TUBULAR SHIELDED HOLLOW COLLAR MADE OF ELASTIC MATERIAL |
| AT1125/90 | 1990-05-21 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0458778A1 true EP0458778A1 (en) | 1991-11-27 |
| EP0458778B1 EP0458778B1 (en) | 1995-04-05 |
Family
ID=3507130
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP91890110A Expired - Lifetime EP0458778B1 (en) | 1990-05-21 | 1991-05-16 | Tubular reusable and inflatable moulding form of elastic material |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP0458778B1 (en) |
| AT (2) | AT396157B (en) |
| DE (1) | DE59105077D1 (en) |
| HU (1) | HU207366B (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB565392A (en) * | 1943-06-23 | 1944-11-08 | Charles Bernard Mathews | Improvements in inflatable cores for use in casting hollow concrete units |
| FR1121061A (en) * | 1955-02-01 | 1956-07-20 | Sonico | Process for the erection of constructions and the preparation of reinforced concrete construction elements |
| FR1279634A (en) * | 1960-12-28 | 1961-12-22 | Apparatus and method for constructing cement pipes with ovoid cross-section, more particularly for sewers | |
| FR2088097A1 (en) * | 1970-05-19 | 1972-01-07 | Epis Michelle | |
| US3814372A (en) * | 1971-06-22 | 1974-06-04 | W Western | Open-top shell molding apparatus |
| US3973749A (en) * | 1971-05-05 | 1976-08-10 | Semperit Aktiengesellschaft | Hollow formwork elements for producing concrete structures |
| AT359733B (en) * | 1976-02-20 | 1980-11-25 | Bubble System Ag | INFLATABLE HOLLOW SHIELD BODY MADE OF FLEXIBLE MATERIAL FOR PRODUCING BUILDINGS BY SPRAYING CONCRETE OR THE LIKE. |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AT312899B (en) * | 1971-05-05 | 1974-01-25 | Semperit Ag | Reusable formwork hollow body made of elastic material and filled with a gaseous or liquid medium |
| AT320946B (en) * | 1972-01-13 | 1975-03-10 | Semperit Ag | Reusable, hollow shuttering body filled with a gaseous or liquid medium |
-
1990
- 1990-05-21 AT AT0112590A patent/AT396157B/en not_active IP Right Cessation
-
1991
- 1991-05-14 HU HU911612A patent/HU207366B/en not_active IP Right Cessation
- 1991-05-16 EP EP91890110A patent/EP0458778B1/en not_active Expired - Lifetime
- 1991-05-16 DE DE59105077T patent/DE59105077D1/en not_active Expired - Fee Related
- 1991-05-16 AT AT91890110T patent/ATE120827T1/en not_active IP Right Cessation
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB565392A (en) * | 1943-06-23 | 1944-11-08 | Charles Bernard Mathews | Improvements in inflatable cores for use in casting hollow concrete units |
| FR1121061A (en) * | 1955-02-01 | 1956-07-20 | Sonico | Process for the erection of constructions and the preparation of reinforced concrete construction elements |
| FR1279634A (en) * | 1960-12-28 | 1961-12-22 | Apparatus and method for constructing cement pipes with ovoid cross-section, more particularly for sewers | |
| FR2088097A1 (en) * | 1970-05-19 | 1972-01-07 | Epis Michelle | |
| US3973749A (en) * | 1971-05-05 | 1976-08-10 | Semperit Aktiengesellschaft | Hollow formwork elements for producing concrete structures |
| US3814372A (en) * | 1971-06-22 | 1974-06-04 | W Western | Open-top shell molding apparatus |
| AT359733B (en) * | 1976-02-20 | 1980-11-25 | Bubble System Ag | INFLATABLE HOLLOW SHIELD BODY MADE OF FLEXIBLE MATERIAL FOR PRODUCING BUILDINGS BY SPRAYING CONCRETE OR THE LIKE. |
Also Published As
| Publication number | Publication date |
|---|---|
| EP0458778B1 (en) | 1995-04-05 |
| DE59105077D1 (en) | 1995-05-11 |
| HU911612D0 (en) | 1991-11-28 |
| ATE120827T1 (en) | 1995-04-15 |
| ATA112590A (en) | 1992-10-15 |
| HU207366B (en) | 1993-03-29 |
| AT396157B (en) | 1993-06-25 |
| HUT60002A (en) | 1992-07-28 |
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