EP2500479B1 - Wall construction element consisting of two layers of concrete which are spaced apart and connected with a bolt - Google Patents

Wall construction element consisting of two layers of concrete which are spaced apart and connected with a bolt Download PDF

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Publication number
EP2500479B1
EP2500479B1 EP12159663.9A EP12159663A EP2500479B1 EP 2500479 B1 EP2500479 B1 EP 2500479B1 EP 12159663 A EP12159663 A EP 12159663A EP 2500479 B1 EP2500479 B1 EP 2500479B1
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EP
European Patent Office
Prior art keywords
wall construction
construction element
bolt
element according
shell
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EP12159663.9A
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German (de)
French (fr)
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EP2500479A1 (en
Inventor
Herbert Kahmer
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Syspro-Gruppe Betonbauteile eV
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Syspro-Gruppe Betonbauteile eV
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    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C2/00—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels
    • E04C2/02—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials
    • E04C2/04—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials of concrete or other stone-like material; of asbestos cement; of cement and other mineral fibres
    • E04C2/044—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials of concrete or other stone-like material; of asbestos cement; of cement and other mineral fibres of concrete
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B2/00—Walls, e.g. partitions, for buildings; Wall construction with regard to insulation; Connections specially adapted to walls
    • E04B2/84—Walls made by casting, pouring, or tamping in situ
    • E04B2/86—Walls made by casting, pouring, or tamping in situ made in permanent forms
    • E04B2/8611—Walls made by casting, pouring, or tamping in situ made in permanent forms with spacers being embedded in at least one form leaf
    • E04B2/8617—Walls made by casting, pouring, or tamping in situ made in permanent forms with spacers being embedded in at least one form leaf with spacers being embedded in both form leaves
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C2/00—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels
    • E04C2/02—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials
    • E04C2/04—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials of concrete or other stone-like material; of asbestos cement; of cement and other mineral fibres
    • E04C2/044—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials of concrete or other stone-like material; of asbestos cement; of cement and other mineral fibres of concrete
    • E04C2002/045—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials of concrete or other stone-like material; of asbestos cement; of cement and other mineral fibres of concrete with two parallel leaves connected by tie anchors
    • E04C2002/047—Pin or rod shaped anchors

Definitions

  • the invention relates to a wall component with mutually spaced concrete shells and the concrete shells connecting, embedded with their ends in the shell concrete bolts, at least one of the two bolt ends when concreting against a shell forming the formwork surface.
  • Wall elements are from the DE 10 2005 041 082 A1 known.
  • the connecting bolts of these known wall components consist of bundles over the length of the bolt endless glass fiber strands, which are embedded in a plastic. At their ends, the bolts are formed asymmetrically with an end surface which is at an angle of 30 ° to 85 ° to the bolt longitudinal axis. While the tensile strength of the connecting bolts is relatively high, they have low compressive and shear strength and are extremely sensitive to retrofitting due to the continuous glass fibers. Also problematic is the so-called. Fiberglass corrosion, which requires a compensation of the bolt surface.
  • Wall elements of the type mentioned go from the DE 20 2009 004 195 U1 , the DE 203 18 424 U1 , the US 2005/0016095 A1 as well as the DE 10 2007 013 626 A1 out. All of these known wall components have, as means for holding a bolt end at a distance from a formwork surface forming the concrete shell in question, a tail piece that tapers uniformly with respect to the bolt cross section.
  • the invention has for its object to provide a new improved wall element of the type mentioned, in the flaking and microcracks in the areas mentioned are largely avoided.
  • the wall element according to the invention solves this problem is characterized in that the bolt end abuts against the shuttering surface via a relative to the bolt in cross-section reduced clearance for receiving aggregate grains in the shell concrete spacer pin forming a to the spacer pin in the cross-section reducing portion of Bolzens and the spacer pin filling the free space projecting area between the unused end of the bolt and the formwork surface to 20 to 30%.
  • said means comprise a spacer pin reduced in cross section with respect to the pin.
  • the spacer pin is arranged coaxially to the longitudinal axis of the bolt. Its cross-section can be reduced to its free end.
  • the cross section of the bolt also decreases towards the spacer pin.
  • a projection area is created into which only the spacer pin and the tapered pin end extend, the degree of filling of this projection area being expediently 20 to 30% and the remaining space remaining free.
  • the lateral surface of the decreasing in cross-section bolt kinks in the lateral surface of the spacer pin over.
  • the spacer pin has a length of between 4 mm and 6 mm proved at a bolt diameter of about 16 mm.
  • the pin diameter is suitably between 3 mm and 5 mm.
  • a reduction of the peg diameter can be made eg from 5 mm to 3 mm at the free end.
  • the bolt including said devices consists of polyamide, preferably with an addition of short glass fibers of 30% to 50%.
  • the bolts can remove the weight of the outer shell alone, which additionally contributes to the prevention of cracks and flaking.
  • the bolts are advantageously made in one piece as a casting, in particular injection molded part.
  • the surface is not tempered, as the fiberglass corrosion can not lead to the failure of endless strands, but plays only on near-surface fiber particles.
  • the bolts may have projections, in particular annular projections and / or longitudinal ribs. Annular projections and longitudinal ribs can be used to dampen the sound transmission. On the other hand, annular projections can also serve to seal passage openings for the bolts in a heat insulation.
  • Ring projections also serve as so-called WU collars for sealing in-situ concrete when water is pressed onto the outer shell and for lengthening the flow path when moisture migrates along the bolt.
  • eyelets are provided as projections, which can form the said holding devices, by means of which the bolts can be held in the production of the second shell at a distance from the formwork floor.
  • the eyelets of several bolts can accommodate a steel reinforcing strand.
  • one of the two shells as a support shell, the other is designed as a facing shell, wherein the spacer pin is preferably formed on the embedded in the facing shell end of the bolt.
  • the above-mentioned insulation preferably extends continuously over the entire wall component, with the exception of passage openings for the bolts.
  • An in Fig. 1 shown wall component comprises a support shell 1 and a distance to the support shell 1 spaced attachment shell 2.
  • the front shell 2 is connected on its inside with an insulation 3.
  • Between the insulation 3 and the tray 1 is a layer 4 of in-situ concrete, which reinforces the tray 1.
  • the support shell 1 is connected to the front shell 2 solely by bolts 5, which are embedded with their ends in the concrete of the supporting or facing shell.
  • the total thickness of the wall component is 36 cm, the supporting shell thickness 5 cm, the in-situ concrete layer thickness 12 cm, the facing shell thickness 7 cm and the thickness of the insulation 12 cm.
  • Both the support shell 1 and the facing shell 2 have a steel reinforcement.
  • the bolts 5 are made of polyamide into which short, e.g. only 100 microns to 400 microns long and about 10 microns thick glass fibers are embedded, the glass fiber content is between 30% and 50%.
  • the compressive and shear strength is 200 MPa.
  • a total of 48 bolts 5 are provided in the embodiment shown for connecting the support shell 1 to the facing shell 2.
  • the insulation 3 extends to openings for the bolt 5 continuously over the entire surface of the wall component.
  • a bolt 5 has at its intended for embedding in the facing shell 2 end to the bolt longitudinal axis coaxial spacer pin 6 projecting from a conical end face 7 of the bolt 5 and its length 5 mm and the diameter of 3 mm is.
  • a first annular projection 8 connects, followed at a distance further different width annular projections, of which in Fig. 3 the annular projections 9,10,11,1 1 ', 12 and 13 are shown.
  • the ring width of the free circumferential surface of the annular projection 11 ' is about 14 mm with a bolt diameter of 16 mm.
  • the surface can be profiled or rough to improve the bonding effect with the base concrete.
  • the annular projection 13 merges into a conical end surface 14 which has a pin corresponding to the spacer pin 6. Between the annular webs project from the bolt 5 in each case as far as the annular webs diametrically opposed longitudinal ribs 15, e.g. eight ribs distributed over the circumference.
  • the annular projections are conical, i. the diameter of the annular projection 8 decreases from 16 to 15 mm and that of the annular projection 9 from 15 to 14 mm.
  • the diameter of the annular projections 10 to 13 is 14 mm.
  • FIG. 2 shows the spacer pin 6, whose diameter is small compared to the total diameter D of the bolt 5, between the bolt end and the shuttering floor 16 for sufficient space 17 to receive aggregate grains 18. A spalling of concrete on the outside of the facing shell 2 is avoided. When sinking the bolts in the still liquid concrete, the thin and elastic spacer pin 6 ensures suitable displacement of aggregate grains to the side.
  • a spacer pin 6a can taper towards the free end and at the other end without kinks pass directly into a curved lateral surface 21 of the bolt 5.
  • an eyelet 20 is formed on the bolt 5, which allows to hold the protruding into the facing shell bolt 5 so that between the shuttering floor 16 and a conical Bolzenend constitutional 7 a clearance 19 remains.
  • the bolts can form a screw base for a dowel.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Forms Removed On Construction Sites Or Auxiliary Members Thereof (AREA)

Description

Die Erfindung betrifft ein Wandbauelement mit zueinander im Abstand angeordneten Betonschalen und die Betonschalen verbindenden, mit ihren Enden in den Schalenbeton eingebetteten Bolzen, wobei wenigstens eines der beiden Bolzenenden beim Einbetonieren gegen eine die betreffende Schale bildende Schalungsfläche anliegt.The invention relates to a wall component with mutually spaced concrete shells and the concrete shells connecting, embedded with their ends in the shell concrete bolts, at least one of the two bolt ends when concreting against a shell forming the formwork surface.

Wandbauelemente sind aus der DE 10 2005 041 082 A1 bekannt. Die Verbindungsbolzen dieser bekannten Wandbauelemente bestehen aus Bündeln über die Länge des Bolzens endloser Glasfaserstränge, die in einen Kunststoff eingebettet sind. An ihren Enden sind die Bolzen asymmetrisch mit einer Endfläche ausgebildet, die zur Bolzenlängsachse in einem Winkel von 30 ° bis 85 ° steht. Während die Zugfestigkeit der Verbindungsbolzen verhältnismäßig hoch ist, weisen sie eine geringe Druck- und Schubfestigkeit auf und sind aufgrund der durchgehenden Glasfasern gegen nachträgliches Anbohren äußerst empfindlich. Problematisch ist auch die sog. Glasfaserkorrosion, die eine Vergütung der Bolzenoberfläche erfordert.Wall elements are from the DE 10 2005 041 082 A1 known. The connecting bolts of these known wall components consist of bundles over the length of the bolt endless glass fiber strands, which are embedded in a plastic. At their ends, the bolts are formed asymmetrically with an end surface which is at an angle of 30 ° to 85 ° to the bolt longitudinal axis. While the tensile strength of the connecting bolts is relatively high, they have low compressive and shear strength and are extremely sensitive to retrofitting due to the continuous glass fibers. Also problematic is the so-called. Fiberglass corrosion, which requires a compensation of the bolt surface.

Bei einem in der DE 20 2007 004 408 U1 beschriebenen Wandbauelement der eingangs genannten Art wird eine zu geringe Druck- und Schubfestigkeit der Verbindungsbolzen durch zusätzliche, Druck- und Schubkräfte übertragende Elemente ausgeglichen. Entsprechend hoch ist der Materialaufwand.At one in the DE 20 2007 004 408 U1 described wall component of the type mentioned too low pressure and shear strength of the connecting bolt is compensated by additional, compressive and shear forces transmitting elements. Accordingly high is the cost of materials.

Sowohl bei dem Wandbauelement nach der DE 10 2005 041 082 A1 als auch demjenigen nach der DE 20 2007 004 408 U1 treten nachteilig Abplatzungen und Mikrorisse auf der Außenseite der Betonschalen in dem in Fig. 4 durch H und D gekennzeichneten Bereich auf, welcher den Enden der Verbindungsbolzen gegenüberliegt. Dies betrifft insbesondere die Betonschale, welche als zweite gegossen wird.Both in the wall component after the DE 10 2005 041 082 A1 as well as the one after the DE 20 2007 004 408 U1 Chipping and microcracks on the outside of the concrete shells in the in Fig. 4 marked by H and D. Area, which faces the ends of the connecting bolt. This applies in particular to the concrete shell, which is cast as the second.

Wandbauelemente der eingangs erwähnten Art gehen aus der DE 20 2009 004 195 U1 , der DE 203 18 424 U1 , der US 2005/0016095 A1 sowie der DE 10 2007 013 626 A1 hervor. Alle diese bekannten Wandbauelemente weisen als Einrichtungen zum Halten eines Bolzenendes im Abstand von einer die betreffende Betonschale bildenden Schalungsfläche ein sich gegenüber dem Bolzenquerschnitt gleichmäßig verjüngendes Endstück auf.Wall elements of the type mentioned go from the DE 20 2009 004 195 U1 , the DE 203 18 424 U1 , the US 2005/0016095 A1 as well as the DE 10 2007 013 626 A1 out. All of these known wall components have, as means for holding a bolt end at a distance from a formwork surface forming the concrete shell in question, a tail piece that tapers uniformly with respect to the bolt cross section.

Der Erfindung liegt die Aufgabe zugrunde, ein neues verbessertes Wandbauelement der eingangs erwähnten Art zu schaffen, bei dem Abplatzungen und Mikrorisse in den genannten Bereichen weitgehend vermieden sind.The invention has for its object to provide a new improved wall element of the type mentioned, in the flaking and microcracks in the areas mentioned are largely avoided.

Das diese Aufgabe lösende Wandbauelement nach der Erfindung ist dadurch gekennzeichnet, dass das Bolzenende gegen die Schalungsfläche über einen gegenüber dem Bolzen im Querschnitt verringerten Freiraum für die Aufnahme von Zuschlagskörnern im Schalenbeton bildenden Abstandshalterzapfen anliegt, wobei ein sich zu dem Abstandhalterzapfen hin im Querschnitt verringernder Abschnitt des Bolzens und der Abstandhalterzapfen einen den Freiraum umfassenden Projektionsbereich zwischen dem unverjüngten Ende des Bolzens und der Schalungsfläche zu 20 bis 30 % ausfüllen.The wall element according to the invention solves this problem is characterized in that the bolt end abuts against the shuttering surface via a relative to the bolt in cross-section reduced clearance for receiving aggregate grains in the shell concrete spacer pin forming a to the spacer pin in the cross-section reducing portion of Bolzens and the spacer pin filling the free space projecting area between the unused end of the bolt and the formwork surface to 20 to 30%.

Durch die erfindungsgemäßen Einrichtungen lässt sich zwischen den Enden der Bolzen und der durch die Schalungsfläche gebildeten äußeren Schalenoberfläche vorteilhaft ein Bereich bilden, der problemlos Zuschlagskörner aufnehmen kann. Durch Temperaturschwankungen bedingte Abplatzungen dünner Betonschichten lassen sich so verhindern.By means of the devices according to the invention, it is advantageously possible to form a region between the ends of the bolts and the outer shell surface formed by the formwork surface, which area can easily receive aggregate grains. Flaking of thin concrete layers due to temperature fluctuations can thus be prevented.

In der Ausführungsform der Erfindung umfassen die genannten Einrichtungen einen gegenüber dem Bolzen im Querschnitt verringerten Abstandhalterzapfen. Vorteilhaft schiebt dieser dünne, ggf. elastische Zapfen im Weg befindliche Zuschlagskörner zur Seite, bevor er auf dem Schalungsboden aufsitzt.In the embodiment of the invention said means comprise a spacer pin reduced in cross section with respect to the pin. Advantageously pushes this thin, possibly elastic pin located in the way aggregate grains aside before he sits on the formwork floor.

Zweckmäßig ist der Abstandhalterzapfen koaxial zur Längsachse des Bolzens angeordnet. Sein Querschnitt kann sich zu seinem freien Ende hin verringern.Suitably, the spacer pin is arranged coaxially to the longitudinal axis of the bolt. Its cross-section can be reduced to its free end.

Vorzugsweise verringert sich auch der Querschnitt des Bolzens zu dem Abstandhalterzapfen hin. Zwischen dem Bolzenende und dem Schalungsboden entsteht dann ein Projektionsbereich, in den nur noch der Abstandhalterzapfen und das sich verjüngende Bolzenende hineinreicht, wobei der Ausfüllungsgrad dieses Projektionsbereiches zweckmäßig 20 bis 30 % beträgt und der restliche Raum frei bleibt.Preferably, the cross section of the bolt also decreases towards the spacer pin. Between the bolt end and the bottom of the formwork a projection area is created into which only the spacer pin and the tapered pin end extend, the degree of filling of this projection area being expediently 20 to 30% and the remaining space remaining free.

In einer Ausführungsform der Erfindung geht die Mantelfläche des sich im Querschnitt verringernden Bolzens knickfrei in die Mantelfläche des Abstandhalterzapfens über.In one embodiment of the invention, the lateral surface of the decreasing in cross-section bolt kinks in the lateral surface of the spacer pin over.

Als zweckmäßige Länge des Abstandhalterzapfens hat sich bei einem Bolzendurchmesser von etwa 16 mm eine Länge von zwischen 4 mm und 6 mm erwiesen. Der Zapfendurchmesser liegt zweckmäßig zwischen 3 mm und 5 mm. Eine Verringerung des Zapfendurchmessers kann z.B. von 5 mm auf 3 mm am freien Ende erfolgen.As a suitable length of the spacer pin has a length of between 4 mm and 6 mm proved at a bolt diameter of about 16 mm. The pin diameter is suitably between 3 mm and 5 mm. A reduction of the peg diameter can be made eg from 5 mm to 3 mm at the free end.

In einer besonders bevorzugten Ausführungsform der Erfindung besteht der Bolzen einschließlich der genannten Einrichtungen aus Polyamid, vorzugsweise mit einem Zusatz kurzer Glasfasern von 30 % bis 50 %. So lässt sich zweckmäßig eine hohe Druck- und Schubfestigkeit in Verbindung mit einem geeigneten E-Modul erreichen. Solche Bolzen können das Eigengewicht der Außenschale allein abtragen, was zusätzlich zur Vermeidung von Rissen und Abplatzungen beiträgt. Halteeinrichtungen, insbesondere ein Aufsetzen der Außenschale fußseitig auf einen Träger, was zu Wärmebrücken führt, können entfallen.In a particularly preferred embodiment of the invention, the bolt including said devices consists of polyamide, preferably with an addition of short glass fibers of 30% to 50%. Thus, it is expedient to achieve a high compressive and shear strength in conjunction with a suitable modulus of elasticity. Such bolts can remove the weight of the outer shell alone, which additionally contributes to the prevention of cracks and flaking. Holding devices, in particular a placement of the outer shell foot side on a support, which leads to thermal bridges, can be omitted.

Die Bolzen sind zweckmäßig einstückig als Gussteil, insbesondere Spritzgussteil hergestellt. Die Oberfläche ist nicht vergütet, da die Glasfaserkorrosion nicht zum Versagen von Endlossträngen führen kann, sondern sich nur an oberflächennahen Faserpartikeln abspielt. Die Bolzen können Anformungen, insbesondere Ringvorsprünge und/oder Längsrippen aufweisen. Durch Ringvorsprünge und Längsrippen lässt sich die Schallübertragung dämpfen. Ringvorsprünge können anderseits auch zur Abdichtung von Durchgangsöffnungen für die Bolzen in einer Wärmedämmung dienen.The bolts are advantageously made in one piece as a casting, in particular injection molded part. The surface is not tempered, as the fiberglass corrosion can not lead to the failure of endless strands, but plays only on near-surface fiber particles. The bolts may have projections, in particular annular projections and / or longitudinal ribs. Annular projections and longitudinal ribs can be used to dampen the sound transmission. On the other hand, annular projections can also serve to seal passage openings for the bolts in a heat insulation.

Ringvorsprünge dienen als sog. WU-Kragen ferner auch zur Abdichtung im Ortbeton bei auf die Außenschale drückendem Wasser sowie zur Verlängerung des Fließweges, wenn Feuchte am Bolzen entlang wandert.Ring projections also serve as so-called WU collars for sealing in-situ concrete when water is pressed onto the outer shell and for lengthening the flow path when moisture migrates along the bolt.

Als weitere Anformungen kommen Noppen in Betracht, die eine besondere Anhaftung der Bolzen an den Beton ermöglichen. In einer weiteren Ausführungsform der Erfindung sind als Anformungen Ösen vorgesehen, die die genannten Halteeinrichtungen bilden können, durch welche die Bolzen bei der Herstellung der zweiten Schale im Abstand vom Schalungsboden gehalten werden können.As further formations come nubs into consideration, which allow a special adhesion of the bolt to the concrete. In a further embodiment of the invention eyelets are provided as projections, which can form the said holding devices, by means of which the bolts can be held in the production of the second shell at a distance from the formwork floor.

Auch können die Ösen mehrerer Bolzen einen Stahl-Bewehrungsstrang aufnehmen.Also, the eyelets of several bolts can accommodate a steel reinforcing strand.

Zweckmäßig ist eine der beiden Schalen als Tragschale, die andere als Vorsatzschale ausgebildet, wobei der Abstandhalterzapfen vorzugsweise an dem in die Vorsatzschale eingebetteten Ende der Bolzen gebildet ist.Suitably, one of the two shells as a support shell, the other is designed as a facing shell, wherein the spacer pin is preferably formed on the embedded in the facing shell end of the bolt.

Die oben genannte Dämmung erstreckt sich vorzugsweise durchgehend über das gesamte Wandbauelement, mit Ausnahme von Durchgangsöffnungen für die Bolzen.The above-mentioned insulation preferably extends continuously over the entire wall component, with the exception of passage openings for the bolts.

Die Erfindung wird nachfolgend anhand von Ausführungsbeispielen und der beiliegenden, sich auf diese Ausführungsbeispiele beziehenden Zeichnungen weiter erläutert. Es zeigen:

Fig. 1
ein erfindungsgemäßes Wandbauelement,
Fig. 2
verschiedene Ausführungsbeispiele für Verbindungsbolzen eines erfindungsgemäßen Wandbauelements, wobei die letzte Figur nicht Teil der Erfindung ist,
Fig. 3
ein weiteres Ausführungsbeispiel für einen Verbindungsbolzen eines erfindungsgemäßen Wandbauelements, und
Fig. 4
eine in Verbindung mit Fig. 2 die Wirkung der Verbindungsbolzen, gemäß dem Stand der Technik, erläuternde Darstellung.
The invention will be explained below with reference to embodiments and the accompanying, relating to these embodiments drawings. Show it:
Fig. 1
a wall element according to the invention,
Fig. 2
various embodiments of connecting bolts of a wall component according to the invention, the last figure is not part of the invention,
Fig. 3
a further embodiment of a connecting bolt of a wall component according to the invention, and
Fig. 4
one in conjunction with Fig. 2 the effect of the connecting bolt, according to the prior art, explanatory illustration.

Ein in Fig. 1 gezeigtes Wandbauelement umfasst eine Tragschale 1 und eine zu der Tragschale 1 im Abstand angeordnete Vorsatzschale 2. Die Vorsatzschale 2 ist auf ihrer Innenseite mit einer Dämmung 3 verbunden. Zwischen der Dämmung 3 und der Tragschale 1 befindet sich eine Lage 4 aus Ortbeton, die die Tragschale 1 verstärkt. Die Tragschale 1 ist mit der Vorsatzschale 2 allein durch Bolzen 5 verbunden, die mit ihren Enden in den Beton der Trag- bzw. Vorsatzschale eingebettet sind.An in Fig. 1 shown wall component comprises a support shell 1 and a distance to the support shell 1 spaced attachment shell 2. The front shell 2 is connected on its inside with an insulation 3. Between the insulation 3 and the tray 1 is a layer 4 of in-situ concrete, which reinforces the tray 1. The support shell 1 is connected to the front shell 2 solely by bolts 5, which are embedded with their ends in the concrete of the supporting or facing shell.

In dem gezeigten Ausführungsbeispiel beträgt die Gesamtdicke des Wandbauelements 36 cm, die Tragschalendicke 5 cm, die Ortbetonschichtdicke 12 cm, die Vorsatzschalendicke 7 cm und die Dicke der Dämmung 12 cm. Sowohl die Tragschale 1 als auch die Vorsatzschale 2 weisen eine Stahlbewehrung auf. Die Bolzen 5 bestehen aus Polyamid, in das kurze, z.B. nur 100 µm bis 400 µm lange und etwa 10 µm dicke Glasfasern eingebettet sind, wobei der Glasfaseranteil zwischen 30 % und 50 % liegt. Die Druck- bzw. Schubfestigkeit liegt bei 200 MPa.In the embodiment shown, the total thickness of the wall component is 36 cm, the supporting shell thickness 5 cm, the in-situ concrete layer thickness 12 cm, the facing shell thickness 7 cm and the thickness of the insulation 12 cm. Both the support shell 1 and the facing shell 2 have a steel reinforcement. The bolts 5 are made of polyamide into which short, e.g. only 100 microns to 400 microns long and about 10 microns thick glass fibers are embedded, the glass fiber content is between 30% and 50%. The compressive and shear strength is 200 MPa.

Bei Randabmessungen des Wandbauelements von 3 m x 4 m sind in dem gezeigten Ausführungsbeispiel zur Verbindung der Tragschale 1 mit der Vorsatzschale 2 insgesamt 48 Bolzen 5 vorgesehen. Die Dämmung 3 erstreckt sich bis auf Öffnungen für die Bolzen 5 durchgehend über die gesamte Fläche des Wandbauelements.In the case of edge dimensions of the wall component of 3 m × 4 m, a total of 48 bolts 5 are provided in the embodiment shown for connecting the support shell 1 to the facing shell 2. The insulation 3 extends to openings for the bolt 5 continuously over the entire surface of the wall component.

Ein in Fig. 3 detaillierter gezeigtes Ausführungsbeispiel für einen Bolzen 5 weist an seinem zur Einbettung in die Vorsatzschale 2 vorgesehenen Ende einen zur Bolzenlängsachse koaxialen Abstandhalterzapfen 6 auf, der von einer konischen Endfläche 7 des Bolzens 5 vorsteht und dessen Länge 5 mm und dessen Durchmesser 3 mm beträgt. An die konische Endfläche 7 schließt sich ein erster Ringvorsprung 8 an, dem im Abstand weitere unterschiedlich breite Ringvorsprünge folgen, von denen in Fig. 3 die Ringvorsprünge 9,10,11,1 1',12 und 13 gezeigt sind. Der dünnere, jedoch einen größeren Durchmesser von etwa 30 mm aufweisende Ringvorsprung 11' liegt im Bereich später einzubringenden Tragbetons, so dass er als WU-Kragen einen Feuchtedurchtritt verhindern kann.An in Fig. 3 In more detail shown embodiment of a bolt 5 has at its intended for embedding in the facing shell 2 end to the bolt longitudinal axis coaxial spacer pin 6 projecting from a conical end face 7 of the bolt 5 and its length 5 mm and the diameter of 3 mm is. To the conical end surface 7, a first annular projection 8 connects, followed at a distance further different width annular projections, of which in Fig. 3 the annular projections 9,10,11,1 1 ', 12 and 13 are shown. The thinner, but a larger diameter of about 30 mm having annular projection 11 'is in the range later be introduced supporting concrete, so that it can prevent moisture penetration as a WU collar.

Die Ringbreite der frei umlaufenden Oberfläche des Ringvorsprungs 11' beträgt etwa 14 mm bei einem Bolzendurchmesser von 16 mm. Die Oberfläche kann zur Verbesserung der Verbundwirkung mit dem Tragbeton profiliert oder rau sein.The ring width of the free circumferential surface of the annular projection 11 'is about 14 mm with a bolt diameter of 16 mm. The surface can be profiled or rough to improve the bonding effect with the base concrete.

Der Ringvorsprung 13 geht in eine konische Endfläche 14 über, die einen dem Abstandhalterzapfen 6 entsprechenden Zapfen aufweist. Zwischen den Ringstegen stehen von dem Bolzen 5 jeweils so weit wie die Ringstege einander diametral gegenüberliegende Längsrippen 15 vor, z.B. acht Rippen verteilt über den Umfang.The annular projection 13 merges into a conical end surface 14 which has a pin corresponding to the spacer pin 6. Between the annular webs project from the bolt 5 in each case as far as the annular webs diametrically opposed longitudinal ribs 15, e.g. eight ribs distributed over the circumference.

Nach Aushärtung der zuerst unter Einbettung der Bolzen 5 gegossenen Vorsatzschale 2 erfolgt das Ausgießen des Betons für die Tragschale 1 auf einem Schalungsboden, wobei zuvor die Dämmung 3 auf den noch unverfestigten Schalenbeton der Vorsatzschale 2 aufgelegt wurde, so dass sie daran anhaftet. Die Bolzen 5 werden durch Öffnungen in der Dämmung 3 hindurch in den frischen Beton der Vorsatzschale eingedrückt, bis die Abstandhalterzapfen 6 mit ihrem freien Ende zur Anlage gegen den Schalungsboden kommen. Die Schubfestigkeit der Bolzen 5 reicht aus, um das Gewicht der Vorsatzschale 2 aufzunehmen, wenn diese gedreht und in den frischen Beton der Tragschale 1 gedrückt wird.After curing of the cast first by casting the pin 5 facing shell 2, the pouring of the concrete for the tray 1 on a formwork floor, wherein previously the insulation 3 was placed on the still unsolidified shell concrete of the facing 2, so that it adheres to it. The bolts 5 are pressed through openings in the insulation 3 into the fresh concrete of the attachment shell until the spacer pins 6 come with their free end to rest against the formwork floor. The shear strength of the bolt 5 is sufficient to accommodate the weight of the facing shell 2 when it is rotated and pressed into the fresh concrete of the tray 1.

In einer für das geschmeidige Durchstecken angepassten Ausbildung sind die Ringvorsprünge konisch, d.h. der Durchmesser des Ringvorsprungs 8 verringert sich von 16 auf 15 mm und der des Ringvorsprungs 9 von 15 auf 14 mm. Der Durchmesser der Ringvorsprünge 10 bis 13 liegt bei 14 mm.In a design adapted for smooth insertion, the annular projections are conical, i. the diameter of the annular projection 8 decreases from 16 to 15 mm and that of the annular projection 9 from 15 to 14 mm. The diameter of the annular projections 10 to 13 is 14 mm.

Wie Fig. 2 zeigt, sorgt der Abstandhalterzapfen 6, dessen Durchmesser klein im Vergleich zum Gesamtdurchmesser D des Bolzens 5 ist, zwischen dem Bolzenende und dem Schalungsboden 16 für genügend Freiraum 17, um Zuschlagskörner 18 aufzunehmen. Ein Abplatzen von Beton auf der Außenseite der Vorsatzschale 2 wird so vermieden. Beim Einsenken der Bolzen in den noch flüssigen Beton sorgt der dünne und elastische Abstandhalterzapfen 6 für geeignete Abdrängung der Zuschlagkörner zur Seite.As Fig. 2 shows the spacer pin 6, whose diameter is small compared to the total diameter D of the bolt 5, between the bolt end and the shuttering floor 16 for sufficient space 17 to receive aggregate grains 18. A spalling of concrete on the outside of the facing shell 2 is avoided. When sinking the bolts in the still liquid concrete, the thin and elastic spacer pin 6 ensures suitable displacement of aggregate grains to the side.

Gemäß dem in Fig. 2 in der Mitte gezeigten Ausführungsbeispiel für einen Bolzen 5 kann sich ein Abstandhalterzapfen 6a zum freien Ende hin verjüngen und am anderen Ende knickfrei unmittelbar in eine gekrümmte Mantelfläche 21 des Bolzens 5 übergehen.According to the in Fig. 2 in the middle shown embodiment of a bolt 5, a spacer pin 6a can taper towards the free end and at the other end without kinks pass directly into a curved lateral surface 21 of the bolt 5.

Bei einer in Fig. 2 ganz rechts gezeigten Ausführungsform, die nicht Teil der Erfindung ist, ist an den Bolzen 5 eine Öse 20 angeformt, die es gestattet, die in die Vorsatzschale hineinstehenden Bolzen 5 so zu halten, dass zwischen dem Schalungsboden 16 und einer konischen Bolzenendfläche 7a ein Freiraum 19 verbleibt.At an in Fig. 2 shown rightmost embodiment, which is not part of the invention, an eyelet 20 is formed on the bolt 5, which allows to hold the protruding into the facing shell bolt 5 so that between the shuttering floor 16 and a conical Bolzenendfläche 7 a clearance 19 remains.

Anstelle von Ösen könnten direkt in die Bolzen eingebaute Durchgangsöffnungen für die Aufnahme von Bewehrungsstangen vorgesehen sein.Instead of eyelets built directly into the bolt through holes for the inclusion of reinforcing rods could be provided.

Die Bolzen können einen Schraubgrund für einen Dübel bilden.The bolts can form a screw base for a dowel.

Claims (13)

  1. Wall construction element having spaced-apart concrete shells (1, 2) and bolts (5), which connect the concrete shells and have their ends embedded in the shell-structure concrete, wherein, during the concreting-in operation, at least one of the two bolt ends butts against a formwork surface (16) which forms the relevant shell (2),
    characterized
    in that the bolt end butts against the formwork surface (16) via a spacer pin (6), which has a reduced cross section in relation to the bolt (5) and forms free space (17) for accommodating aggregate particles (18) in the shell-structure concrete, wherein a portion (7; 21) of the bolt (5), said portion decreasing in cross section in the direction of the spacer pin (6), and the spacer pin (6) fill a projection region, which encompasses the free space (17) and is located between the non-tapered end of the bolt (5) and the formwork surface (16), by up to 20 to 30%.
  2. Wall construction element according to Claim 1,
    characterized
    in that the spacer pin (6) is arranged coaxially in relation to the longitudinal axis of the bolt (5).
  3. Wall construction element according to Claim 1 or 2,
    characterized
    in that the cross section of the spacer pin (6a) decreases in the direction of the free end of the same.
  4. Wall construction element according to one of Claims 1 to 3,
    characterized
    in that the lateral surface (21) of the bolt (5), which decreases in cross section, merges smoothly into the lateral surface of the spacer pin (6a).
  5. Wall construction element according to one of Claims 2 to 4,
    characterized
    in that the length of the spacer pin (6) is between 4 mm and 6 mm and the diameter of the pin is 3 mm to 5 mm.
  6. Wall construction element according to one of Claims 3 to 5,
    characterized
    in that the diameter of the pin decreases from 5 mm to 3 mm in the direction of the free end.
  7. Wall construction element according to one of Claims 1 to 6,
    characterized
    in that the bolts (5), including the aforementioned spacer pins (6), are produced from polyamide, in particular with a glass-fibre additive of preferably 30% to 50%.
  8. Wall construction element according to one of Claims 1 to 7,
    characterized
    in that the bolts (5) are produced in one piece in the form of a moulding, in particular injection moulding.
  9. Wall construction element according to one of Claims 1 to 8,
    characterized
    in that the bolts (5) have formed-on structures, in particular annular protrusions (8-13) and/or longitudinal ribs (15).
  10. Wall construction element according to Claim 9,
    characterized
    in that the formed-on structures provided are protuberances and/or an eyelet (20).
  11. Wall construction element according to one of Claims 1 to 10,
    characterized
    in that one of the two concrete shells (1, 2) is designed in the form of a bearing shell (1) and the other concrete shell is designed in the form of a facing shell (2).
  12. Wall construction element according to Claim 11,
    characterized
    in that the spacer pin (6) is formed at that end of the bolt (5) which is embedded in the facing shell (2) .
  13. Wall construction element according to Claim 11 or 12,
    characterized
    in that an insulation (3), preferably one which is continuous over the entire wall construction element, is arranged on the inside of the facing shell (2).
EP12159663.9A 2011-03-16 2012-03-15 Wall construction element consisting of two layers of concrete which are spaced apart and connected with a bolt Active EP2500479B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102011014063.8A DE102011014063B4 (en) 2011-03-16 2011-03-16 wall element

Publications (2)

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EP2500479A1 EP2500479A1 (en) 2012-09-19
EP2500479B1 true EP2500479B1 (en) 2019-01-09

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Also Published As

Publication number Publication date
DE102011014063A1 (en) 2012-09-20
EP2500479A1 (en) 2012-09-19
DE102011014063B4 (en) 2015-07-02

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