EP3623538A1 - Device and method for connecting textile-reinforced flat concrete elements to an element wall - Google Patents
Device and method for connecting textile-reinforced flat concrete elements to an element wall Download PDFInfo
- Publication number
- EP3623538A1 EP3623538A1 EP19196837.9A EP19196837A EP3623538A1 EP 3623538 A1 EP3623538 A1 EP 3623538A1 EP 19196837 A EP19196837 A EP 19196837A EP 3623538 A1 EP3623538 A1 EP 3623538A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- concrete
- anchor
- shaft
- foot
- reinforcement
- 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.)
- Withdrawn
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- 239000004567 concrete Substances 0.000 title claims abstract description 110
- 238000000034 method Methods 0.000 title claims abstract description 10
- 230000002787 reinforcement Effects 0.000 claims abstract description 77
- 239000004753 textile Substances 0.000 claims abstract description 59
- 238000009415 formwork Methods 0.000 claims description 16
- 239000000463 material Substances 0.000 claims description 7
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 6
- 229910052799 carbon Inorganic materials 0.000 claims description 6
- 229920002430 Fibre-reinforced plastic Polymers 0.000 claims description 2
- 239000011151 fibre-reinforced plastic Substances 0.000 claims description 2
- 238000002360 preparation method Methods 0.000 claims description 2
- 238000003780 insertion Methods 0.000 abstract description 10
- 230000037431 insertion Effects 0.000 abstract description 10
- 125000006850 spacer group Chemical group 0.000 description 15
- 238000010276 construction Methods 0.000 description 7
- 239000000835 fiber Substances 0.000 description 6
- 239000011152 fibreglass Substances 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 6
- 238000004873 anchoring Methods 0.000 description 4
- 229920000049 Carbon (fiber) Polymers 0.000 description 3
- 239000004917 carbon fiber Substances 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 238000009413 insulation Methods 0.000 description 3
- 241000446313 Lamella Species 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000011065 in-situ storage Methods 0.000 description 2
- 239000011150 reinforced concrete Substances 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000000284 resting effect Effects 0.000 description 1
Images
Classifications
-
- 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
- E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
- E04C5/16—Auxiliary parts for reinforcements, e.g. connectors, spacers, stirrups
- E04C5/168—Spacers connecting parts for reinforcements and spacing the reinforcements from the form
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
- E04C5/16—Auxiliary parts for reinforcements, e.g. connectors, spacers, stirrups
- E04C5/20—Auxiliary parts for reinforcements, e.g. connectors, spacers, stirrups of material other than metal or with only additional metal parts, e.g. concrete or plastics spacers with metal binding wires
-
- 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 device and a method for the spaced connection of a first and a second flat concrete element, preferably carbon concrete walls, with a thickness between 1 and 5 cm, preferably between 2 and 4, particularly preferably 3 cm, to an element wall comprising the concrete elements a textile reinforcement, the device being designed as a shaft anchor, the shaft anchor comprising a shaft with a first and a second end, the shaft anchor having a length that defines the intended spacing of the concrete elements in the element wall, the first end serving as an anchor foot is trained.
- Element walls which have been known for a long time from the prior art, also referred to as double walls, triple walls, triple-chamber walls or hollow walls, are, according to the usual practice, storey-high semi-finished parts made of two 4.5 cm to 7.5 cm thick reinforced concrete shells which are connected to one another by a lattice girder .
- the reinforcement is installed in the factory when the element walls are manufactured.
- the space in between is poured on site with in-situ concrete so that the overall cross-section is monolithic.
- the element wall thus represents lost formwork.
- the element wall can be produced in exposed concrete quality on both sides. Since the surfaces are generally very smooth, plastering can generally be dispensed with.
- non-exposed concrete walls only the joints of the element joints and, if necessary, the pores of the air inclusions are filled and the surfaces z.
- B. painted or papered. The construction enables a very economical construction.
- connecting elements are used to connect the individual walls parallel and spaced apart.
- the usual procedure is to concrete a facing including steel reinforcement and then to place thermal insulation on it.
- the connecting means are then pressed into the still fresh concrete through prefabricated holes in the thermal insulation.
- the arrangement is turned and the free ends of the connecting means are immersed in the freshly concreted supporting shell, in which there is already a steel reinforcement.
- Such solutions are from the publications EP 2500479 A1 , DE 19516134 A1 , EP 0825310 A2 and DE 20008530 U1 known.
- the publications disclose further manufacturing processes for the erection of double-shell walls US 1762099 A , DE 19951913 A1 , CH 161758 A . It is also possible to glue the connecting means to the hardened wall shells, like the publication EP 179046 A2 can be seen.
- a connecting element designed as a sleeve anchor for concrete parts is from the document EP 0 698 702 A1 known.
- a sleeve anchor for concrete parts is disclosed, consisting of an internally threaded stop sleeve and an anchor shaft with an integrally formed flat anchor foot, the anchor shaft protruding with its connecting end facing away from the anchor foot into a connecting section of the stop sleeve, which is pressed with the connecting end.
- plate foot is unsuitable for textile reinforcement, since it either does not pass through the mesh openings in a mesh-like textile layer, e.g. B. can be performed in a scrim or find insufficient support behind the reinforcement.
- the publication DE 10 2012 025 629 A1 relates to spacers 44 for insertion into components to be produced with a base material with integrated textile reinforcement, which contains at least one textile reinforcement layer 21, which consists of at least two crossing yarns, comprising at least one locking holder 3 and a counter holder 24 adapted and positioned on the locking holder 3.
- the locking holder 3 having a shaft 9 has unevenness, overhangs and / or projections 11, 12 on the shaft 9 which, in the case of locking, produce a non-positive connection with a hole 6 in the selected and adapted counter-holder 24.
- the locking holder 3 has a hat-like, circular head 7 which is attached to the shaft 9.
- the shaft 9 of the locking holder 3 has a full cross section for the arrangement between the textile yarns or a free cut which corresponds at least to the textile yarn thickness in order to enable an arrangement above the textile yarn.
- a defined distance between the textile reinforcement layer 21 and the formwork boundary or outer component surface is thus formed between the textile reinforcement and the formwork boundary or the outer surface of the component by means of the spacers 44.
- the publication GB 2 399 108 A describes a wall anchor for a textile reinforcement that can be attached spaced from a structure.
- a wall fastening anchor for use with a wall fastening element for anchoring a second structure, for example a textile reinforcement, to a first structure, for example a wall.
- the anchor may have pairs of rotationally offset projections, preferably extending radially from the end of the tubular anchor, and spacing the textile reinforcement from the wall.
- the manufacture of the projections is complex. The same applies to assembly, in which the different projections have to be placed between the yarns of the textile reinforcement.
- a spacer for a reinforcement layer, a reinforcement arrangement for a concrete component and a method for producing a reinforcement arrangement according to the document are also from the prior art DE 10 2013 015 434 A1 .
- the spacers are installed by inserting them into a mesh of the reinforcement layer and connecting them to it by rotation.
- the spacer has at least one fastening arrangement which acts essentially in a first plane, which is spanned by the circumferential direction and the radial direction of the spacer and which is connected to the spacer body.
- the fastening arrangement has at least two connecting elements for the strands or bars of the first reinforcement layer.
- the connecting elements each have at least one groove which has a first and a second groove wall, the longitudinal axis of which lies in the circumferential direction of the spacer and the opening of which points outward in the radial direction.
- the spacer has a main axis of rotation extending in the axial direction. The ends of the first groove walls in the radial direction and the main axis are spaced apart.
- the fastening arrangement has an extent in the angular sections located between the connecting elements that is smaller than the distance in the radial direction in the second plane defined by the first groove walls. Such a spacer is also complex to manufacture and, due to the groove, during assembly.
- the object of the present invention is therefore to overcome the aforementioned disadvantages and in particular a novel connection of textile concrete shells, Concrete elements with textile reinforcement, parallel to each other at a defined distance.
- the bond in the concrete and with the reinforcement should be ensured despite the low available depth of integration.
- a shaft anchor should not touch, at least not stick to, the fibers when passing through the second, freshly concreted textile concrete shell and immersing it in the reinforcement layer.
- a device for the spaced connection of a first and a second flat concrete element to an element wall each comprising a textile reinforcement
- the device being designed as a shaft anchor
- the shaft anchor comprising a shaft with a first and a second end wherein the shaft anchor has a length that defines the intended distance of the concrete elements in the element wall, wherein the first end is designed as an anchor foot.
- the reinforcement fibers are preferably carbon fibers that form the textile reinforcement, which is designed, for example, as a scrim.
- the anchor foot has a polygonal foot contour with n corners, the foot contour matching the mesh opening contour with the textile reinforcement and the side lengths of the foot contour falling short of the dimension of the side lengths of the mesh opening contour so that the anchor foot can be inserted into the mesh opening .
- the corner dimension between the most distant of the n corners, i.e. the diagonally opposite corners, is so large that the foot does not fit through the mesh opening after a rotation of 360 / (2n) degrees, if the corners protrude the most from the reinforcement fibers .
- the shaft anchor according to the invention is used for connecting and spacing textile-reinforced, flat concrete elements.
- a flat element, the anchor foot is formed, which is geometrically designed such that it can be inserted into a concrete layer through a mesh opening of a net-shaped textile reinforcement or the concrete is introduced later.
- the first rod end to be concreted in with the anchor foot which has an anchor tip protruding outwards, opposite the shaft side, can be used at the same time as a spacer for the textile reinforcement.
- a spacer for the textile reinforcement With appropriate spacers under the first layer of textile reinforcement and a longer one Point under the plate of the shaft anchor, an extended anchor point, it is also possible to use two layers of textile as reinforcement in the component, the concrete element.
- the other end of the shaft anchor also enables a sufficient bond in the thin textile concrete shell, the second concrete element. Since this second end has to be inserted into a shell which has already been concreted and provided with textile reinforcement, it is designed in such a way that when it hits the reinforcement it slips off an insertion tip and can be safely guided through the mesh.
- the second end, a tip and preferably radial lamellae are formed as form-locking elements, so that this end can be introduced through a textile reinforcement into a second concrete layer that forms the second concrete element.
- the second end of the shaft anchor is therefore slimmer.
- the profiling by form-locking elements ensures an adequate bond to the concrete.
- a tip at the second end of the shaft is designed as an insertion tip that should it hit a fiber strand when immersed, it slips off and is passed through the mesh of the textile without pressing down the textile reinforcement.
- the connection of the shaft anchor in the concrete is ensured by the special design of the anchor ends.
- the first end of the shaft anchor with the anchor foot a preferably square, plate-shaped flat element, is passed through the textile reinforcement of the first shell to be concreted and then rotated so that the textile rests on the anchor foot. This secures the position of the textile in the component.
- the size of the anchor base is adapted to the mesh size of the textile. The anchor base also ensures the bond to the concrete.
- the anchor foot has an anchor tip protruding toward the side of the anchor foot facing away from the shaft.
- the tip under the anchor foot ensures its positioning and that of the textile at the correct height in the component or at the intended distance from the formwork, it also fixes the shaft anchor at the intended location during the rotation required for anchoring under the reinforcement. Due to their filigree design, the tip is not visible on the surface of the finished wall shell. To prevent the anchor from tipping over, it is fixed with a conventional clamp.
- An advantageous embodiment comprises at least one shaft formed from material with low thermal conductivity.
- Thermal bridges are thus avoided by using a material with low thermal conductivity, for example a fiber-reinforced plastic.
- a material with low thermal conductivity for example a fiber-reinforced plastic.
- GFP glass fiber reinforced plastic
- the first and / or the second textile-reinforced, flat concrete element is designed as a textile concrete element or as a carbon concrete element with a reinforcement made of carbon fibers, which represent the material for the textile reinforcement.
- the first and / or the second textile-reinforced, flat concrete element has a thickness between 1 and 5 cm, preferably between 2 and 4 cm, particularly preferably 3 cm.
- the inventive design of the rod ends in the special, intended shape, in contrast to conventional shaft anchors, enables small embedment depths, for example of only 3 cm, in the concrete to be sufficient.
- the rod ends also ensure safe and damage-free manufacture with close-meshed textile reinforcement.
- Another aspect of the invention relates to a method for connecting flat concrete elements, comprising a textile reinforcement, to form an element wall.
- shaft anchors are used as previously described. Each of the shaft anchors is in a first step with its anchor foot through one of the mesh openings of the textile reinforcement, which is already in a concrete position hung up, led.
- the shaft anchor is rotated 360 / (2n) degrees (for four corners this is 45 °) around the longitudinal axis of the shaft so that it is held under the textile reinforcement or keeps it at a distance from the formwork.
- the first concrete element is concreted in the formwork provided and the concrete is cured. After concreting the first concrete element, thermal insulation can be applied to it.
- a fourth step the preparation of the textile reinforcement is carried out, which is inserted into the formwork with the appropriate spacers, and there the concrete of the second concrete element is carried out.
- the first concrete element is turned through 180 °, if necessary after removal from the formwork, so that the second ends of the shaft anchors point downwards, and the rotated first concrete element with the projecting shaft anchors is placed on the freshly concreted second concrete element which then hardens.
- the concrete can be placed after placing the first concrete element on the formwork of the second concrete element.
- Another aspect of the present invention relates to the use of a device as described above for connecting flat concrete elements to form an element wall.
- the use is preferably carried out according to the method described above.
- a connecting element is proposed in the form of a shaft anchor, preferably consisting of glass fiber reinforced plastic (GRP), which has geometrically shaped rod ends in order to ensure a hold in the concrete with a low embedment depth.
- GRP glass fiber reinforced plastic
- a method for using and using the shaft anchor is proposed.
- the shaft anchor has a flat element, the anchor foot, the contour of the surface of the flat element, which extends perpendicular to the longitudinal extension of the shaft anchor, being matched to the mesh size of the textile.
- the end of the shaft anchor with the polygonal, preferably square-contoured flat element, the anchor foot is passed through a mesh opening in the textile reinforcement of the first shell to be concreted, the first concrete element of the element wall, and then rotated so that the textile rests on the flat element, thereby the position of the textile in the component is secured.
- the flat element can have a tip in order to secure the position of the shaft anchor and to fix the distance to the formwork.
- the other end of the shaft anchor also has a tip, which mainly serves as an insertion tip when penetrating the reinforcement of the second concrete element, and a plurality of radially arranged slats, which act as form-locking elements in the concrete.
- the advantage of the invention consists in the design of the rod ends, which, in contrast to conventional shaft anchors, generally allow anchoring depths of only 3 cm in the concrete.
- the rod ends also ensure that it can be manufactured with close-meshed reinforcement.
- a sufficiently good introduction of the forces occurring into the concrete in the space between the two concrete elements is ensured.
- thermal bridges between the shells to be connected, the two concrete elements are avoided and the connection also has a low weight.
- Fig. 1 shows a schematic perspective illustration of an embodiment of a shaft anchor 1 according to the invention, which comprises a shaft 20 with a first end 30 and in a second end 10.
- the first end 30 has an anchor foot 31 with four sides 32 and four corners 34.
- the second end 10, shown in the foreground, has characteristic lamellas, which act as form-locking elements 12 and hold the shaft anchor 1 firmly in the concrete 8 during the later concreting (cf. Fig. 5 ) guarantee.
- the second end 10 also has an insertion tip 14, through which the shaft anchor 1 is guided safely the mesh openings of the reinforcement 4, not shown here (compare Figures 4 and 5 ) enables.
- Fig. 2 shows a schematic side view of an embodiment of a shaft anchor 1 according to the invention, at the second end 10 of which the shape of the lamellae, the form-locking elements 12, which secure the shaft anchor 1 in particular against pulling out, can be clearly seen.
- they are designed in the direction of the insertion tip 14 by means of rounded, convex surfaces in such a way that they slide off the reinforcement 4 when they pass through them. Otherwise the reinforcement 4 could be pushed out of its position and undesirably shifted towards the formwork.
- the opposite side of the interlocking elements 12, which points toward the first end 30, is flat or concave in the present case in order to achieve a safe anchoring of the shaft anchor 1 in the concrete.
- the insertion tip 14 is also shown.
- the second end 10 is connected to the first end 30 via the shaft 20.
- the shaft 20 preferably has a rotationally symmetrical cross section through which a rotation axis 22 runs.
- the anchor foot 31 at the first end 30 also has an anchor tip 36. This is supported during installation and before the first concrete element 2 is concreted (cf. Fig. 5 ) on the formwork. This prevents the anchor foot 31 from being visible on the surface of the concrete element 2 and also a predetermined spacing of the reinforcement 4 (compare Figures 4 and 5 ) to the surface of the concrete element 2 guaranteed.
- Fig. 3 shows a schematic side view of an embodiment of a shaft anchor 1 according to the invention with dimensions of a particularly advantageous and preferred embodiment, which enables the small embedment depth in the concrete of 3 cm, as is preferably provided.
- the dimensions are shown in the table below: Reference letter Dimension in mm A 300 B 40 C. 8th D 10th E 5 F 10th G ⁇ 25 H ⁇ 14.8 I. ⁇ 5.85
- the anchor foot 31 on the first side 30 of the shaft anchor 1 is accordingly 5 mm, the reinforcement 10 mm covered with concrete 8.
- the expansion of the concrete 8 in the section of both concrete elements 2, 6 is indicated by a dashed line.
- the second side 10 dips into the concrete 8 with at least two lamellae and the insertion tip 14.
- Fig. 4 shows a schematic view from above during the installation of a shaft anchor 1 according to the invention in the reinforcement 4.
- the reinforcement 4 is designed like a net and has uniform, rectangular mesh openings 5.
- the anchor base 31 is designed in accordance with the contour of the mesh openings 5 with four right-angled corners. Its likewise rectangular contour with a dimension of the sides 32 that is smaller than the dimension of the side length of the mesh openings 5 enables the anchor base 31 to be inserted into the mesh opening 5 in a first position of the shaft anchor 1.
- the shaft anchor 1 is then rotated about its longitudinal axis to such an extent that the anchor foot 31 is anchored with its corners 34 behind the reinforcement 4.
- the shaft anchor 1 is held between the reinforcement and the formwork and at the same time prevents the reinforcement 4 from resting on the formwork and later appearing in an undesirable manner on the concrete surface.
- Fig. 5 shows a schematic side view of an element wall 9 using a shaft anchor 1 according to the invention.
- the shaft anchor 1 connects the first concrete element 2 with the second concrete element 6, both concrete elements 2, 6 with reinforcement 4 are equipped.
- the concrete elements 2, 6 have a thickness S, which is preferably 3 cm.
- the first end 30 of the shaft anchor 1 with the anchor foot 31 is concreted into the first concrete element 2.
- the second end 10 of the shaft anchor 1 is concreted into the second concrete element 6, a part of the slats, as an embodiment of the form-fitting elements 12, ensuring a firm bond by form-fitting with the concrete 8.
- the element wall 9 thus created can be transported to the construction site with the distance X between the surfaces of the concrete elements 2, 6 and with a high surface quality and low weight.
- There the space 7 is filled with in-situ concrete so that a stable wall with high quality, especially the surface, is created.
- the intermediate space 7 can also be completely or partially filled with heat-insulating material, so that heat transfer over the finished wall is made more difficult.
- This heat-insulating effect is supported by the shaft anchor 1, which in the preferred embodiment consists at least in the area of the shaft 20 from a material with low thermal conductivity.
- glass fiber reinforced plastic GRP is preferred, which is characterized by high strength and low costs.
Abstract
Die Erfindung betrifft eine Vorrichtung, ein Verfahren und eine Verwendung zur beabstandeten Verbindung von einem ersten und einem zweiten flächigen Betonelement zu einer Elementwand, umfassend eine textile Bewehrung, wobei die Vorrichtung als ein Schaftanker 1 ausgebildet ist. Der Schaftanker umfassend einen Schaft 20 mit einem ersten und einem zweiten Ende 30, 10 und von einer Länge, die den vorgesehenen Abstand der Betonelemente in der Elementwand festlegt, wobei das erste Ende als Ankerfuß 31 ausgebildet ist. Nach der Erfindung weist der Ankerfuß 31 eine mehreckige Fußkontur mit n Ecken auf, wobei die Fußkontur der Maschenöffnungskontur mit der textilen Bewehrung übereinstimmt und die Seitenlängen der Fußkontur das Maß der Seitenlängen der Maschenöffnungskontur so weit unterschreitet, dass ein Einführen des Ankerfußes in die Maschenöffnung 5 möglich ist. Das Eckenmaß zwischen den am weitesten entfernten der n Ecken 34 ist so groß, dass der Ankerfuß 31 nach einer Drehung um 360/(2n) Grad nicht durch die Maschenöffnung 5 passt. Das zweite Ende 10 weist Formschlusselemente 12 auf.The invention relates to a device, a method and a use for the spaced connection of a first and a second flat concrete element to an element wall, comprising a textile reinforcement, the device being designed as a shaft anchor 1. The shaft anchor comprises a shaft 20 with a first and a second end 30, 10 and of a length that defines the intended spacing of the concrete elements in the element wall, the first end being designed as an anchor base 31. According to the invention, the anchor foot 31 has a polygonal foot contour with n corners, the foot contour of the mesh opening contour matching the textile reinforcement and the side lengths of the foot contour falling below the dimension of the side lengths of the mesh opening contour so far that insertion of the anchor foot into the mesh opening 5 is possible is. The corner dimension between the most distant of the n corners 34 is so large that the anchor foot 31 does not fit through the mesh opening 5 after a rotation of 360 / (2n) degrees. The second end 10 has positive locking elements 12.
Description
Die Erfindung betrifft eine Vorrichtung und ein Verfahren zur beabstandeten Verbindung von einem ersten und einem zweiten flächigen Betonelement, bevorzugt Carbonbetonwänden, mit einer Stärke zwischen 1 und 5 cm, bevorzugt zwischen 2 und 4, besonders bevorzugt 3 cm, zu einer Elementwand, die Betonelemente umfassend eine textile Bewehrung, wobei die Vorrichtung als ein Schaftanker ausgebildet ist, der Schaftanker umfassend einen Schaft mit einem ersten und einem zweiten Ende, wobei der Schaftanker eine Länge aufweist, die den vorgesehenen Abstand der Betonelemente in der Elementwand festlegt, wobei das erste Ende als Ankerfuß ausgebildet ist.The invention relates to a device and a method for the spaced connection of a first and a second flat concrete element, preferably carbon concrete walls, with a thickness between 1 and 5 cm, preferably between 2 and 4, particularly preferably 3 cm, to an element wall comprising the concrete elements a textile reinforcement, the device being designed as a shaft anchor, the shaft anchor comprising a shaft with a first and a second end, the shaft anchor having a length that defines the intended spacing of the concrete elements in the element wall, the first end serving as an anchor foot is trained.
Aus dem Stand der Technik seit langem bekannte Elementwände, auch als Doppelwand, Dreifachwand, Dreikammerwand oder Hohlwand bezeichnet, sind nach der bisher üblichen Praxis geschosshohe Halbfertigteile aus zwei 4,5 cm bis 7,5 cm dicken Stahlbetonschalen, die durch einen Gitterträger miteinander verbunden sind. Das Schalen auf der Baustelle entfällt, die Bewehrung wird werkseitig bei der Herstellung der Elementwände eingebaut. Der Zwischenraum wird auf der Baustelle mit Ortbeton vergossen, so dass der Gesamtquerschnitt monolithisch trägt. Die Elementwand stellt damit eine verlorene Schalung dar. Die Elementwand kann bei oberirdischer Verwendung beidseitig in Sichtbetonqualität hergestellt werden. Da die Oberflächen grundsätzlich sehr glatt sind, kann ein Verputzen jedoch generell entfallen. Bei Nicht-Sichtbetonwänden werden dann lediglich die Fugen der Elementstöße und ggf. die Poren der Lufteinschlüsse verspachtelt und die Oberflächen z. B. gestrichen oder tapeziert. Die Konstruktion ermöglicht eine sehr wirtschaftliche Bauweise.Element walls which have been known for a long time from the prior art, also referred to as double walls, triple walls, triple-chamber walls or hollow walls, are, according to the usual practice, storey-high semi-finished parts made of two 4.5 cm to 7.5 cm thick reinforced concrete shells which are connected to one another by a lattice girder . There is no need to formwork on the construction site, the reinforcement is installed in the factory when the element walls are manufactured. The space in between is poured on site with in-situ concrete so that the overall cross-section is monolithic. The element wall thus represents lost formwork. If used above ground, the element wall can be produced in exposed concrete quality on both sides. Since the surfaces are generally very smooth, plastering can generally be dispensed with. In the case of non-exposed concrete walls, only the joints of the element joints and, if necessary, the pores of the air inclusions are filled and the surfaces z. B. painted or papered. The construction enables a very economical construction.
Bei der Herstellung von Doppelwänden aus Stahlbeton werden Verbindungselemente eingesetzt, um die Einzelwände parallel beabstandet zu verbinden. Üblicherweise wird dabei so vorgegangen, dass eine Vorsatzschale inklusive Stahlbewehrung betoniert und anschließend eine Wärmedämmung auf diese gelegt wird. Durch vorgefertigte Löcher in der Wärmedämmung werden die Verbindungsmittel dann in den noch frischen Beton eingedrückt. Nach dem Aushärten der Vorsatzschale wird die Anordnung gewendet und die freien Enden der Verbindungsmittel in die frisch betonierte Tragschale, in welcher bereits eine Stahlbewehrung liegt, eingetaucht. Derartige Lösungen sind aus den Druckschriften
Das Zusammenführen der Bewehrungslagen beider Wandschalen und der Verbindungsmittel dazwischen zu einem einzigen Bewehrungskorb, wie in den Druckschriften
Alternative Lösungen, wie sie z. B. in den Druckschriften
Ein weiteres, als Hülsenanker für Betonteile ausgebildetes Verbindungselement ist aus der Druckschrift
Aus denselben Gründen ist auch die Lösung aus der Druckschrift
Die Druckschrift
Die Druckschrift
Aus dem Stand der Technik ist auch ein Abstandshalter für eine Bewehrungslage, eine Bewehrungsanordnung für ein Betonbauteil sowie ein Verfahren zur Herstellung einer Bewehrungsanordnung gemäß der Druckschrift
Aufgabe der vorliegenden Erfindung ist es daher, die vorgenannten Nachteile zu überwinden und insbesondere eine neuartige Verbindung von Textilbetonschalen, Betonelementen mit textiler Bewehrung, in einem definierten Abstand parallel zueinander zu schaffen. Hierbei soll trotz geringer verfügbarer Einbindetiefe der Verbund im Beton und mit der Bewehrung sichergestellt werden. Dennoch soll auch unter Bedingungen von engen Zwischenräumen in der textilen Bewehrung ein Schaftanker beim Hindurchführen in die zweite, frisch betonierte Textilbetonschale und dem Eintauchen in die Bewehrungsschicht diese nicht berühren, zumindest nicht an deren Fasern hängen bleiben.The object of the present invention is therefore to overcome the aforementioned disadvantages and in particular a novel connection of textile concrete shells, Concrete elements with textile reinforcement, parallel to each other at a defined distance. In this case, the bond in the concrete and with the reinforcement should be ensured despite the low available depth of integration. Nevertheless, even under conditions of narrow gaps in the textile reinforcement, a shaft anchor should not touch, at least not stick to, the fibers when passing through the second, freshly concreted textile concrete shell and immersing it in the reinforcement layer.
Die Aufgabe wird gelöst durch eine Vorrichtung zur beabstandeten Verbindung von einem ersten und einem zweiten flächigen Betonelement zu einer Elementwand, jeweils umfassend eine textile Bewehrung, , wobei die Vorrichtung als ein Schaftanker ausgebildet ist, der Schaftanker umfassend einen Schaft mit einem ersten und einem zweiten Ende wobei der Schaftanker eine Länge aufweist, die den vorgesehenen Abstand der Betonelemente in der Elementwand festlegt, wobei das erste Ende als Ankerfuß ausgebildet ist. Die Bewehrungsfasern sind bevorzugt Carbonfasern, die die textile Bewehrung bilden, die beispielsweise als ein Gelege ausgeführt ist. Nach der Erfindung weist der Ankerfuß eine mehreckige Fußkontur mit n Ecken auf, wobei die Fußkontur mit der Maschenöffnungskontur mit der textilen Bewehrung übereinstimmt und die Seitenlängen der Fußkontur das Maß der Seitenlängen der Maschenöffnungskontur so weit unterschreitet, dass ein Einführen des Ankerfußes in die Maschenöffnung möglich ist. Das Eckenmaß zwischen den am weitesten entfernten der n Ecken, also der diagonal gegenüberliegenden Ecken, ist so groß, dass der Fuß nach einer Drehung um 360/(2n) Grad, wenn die Ecken am weitesten über die Bewehrungsfasern ragen, nicht durch die Maschenöffnung passt.The object is achieved by a device for the spaced connection of a first and a second flat concrete element to an element wall, each comprising a textile reinforcement, the device being designed as a shaft anchor, the shaft anchor comprising a shaft with a first and a second end wherein the shaft anchor has a length that defines the intended distance of the concrete elements in the element wall, wherein the first end is designed as an anchor foot. The reinforcement fibers are preferably carbon fibers that form the textile reinforcement, which is designed, for example, as a scrim. According to the invention, the anchor foot has a polygonal foot contour with n corners, the foot contour matching the mesh opening contour with the textile reinforcement and the side lengths of the foot contour falling short of the dimension of the side lengths of the mesh opening contour so that the anchor foot can be inserted into the mesh opening . The corner dimension between the most distant of the n corners, i.e. the diagonally opposite corners, is so large that the foot does not fit through the mesh opening after a rotation of 360 / (2n) degrees, if the corners protrude the most from the reinforcement fibers .
Der erfindungsgemäße Schaftanker dient zum Verbinden und Beabstanden von textilbewehrten, flächigen Betonelementen. Bei dem Schaftanker ist an einem Ende, dem ersten Ende, ein Flachelement, der Ankerfuß, ausgebildet, das flächig geometrisch derart ausgeführt ist, dass es durch eine Maschenöffnung einer netzförmigen textilen Bewehrung hindurch in eine Betonschicht einbringbar ist bzw. der Beton später eingebracht wird.The shaft anchor according to the invention is used for connecting and spacing textile-reinforced, flat concrete elements. In the shaft anchor, at one end, the first end, a flat element, the anchor foot, is formed, which is geometrically designed such that it can be inserted into a concrete layer through a mesh opening of a net-shaped textile reinforcement or the concrete is introduced later.
Das zuerst einzubetonierende erste Stabende mit dem Ankerfuß, der eine nach außen, der Schaftseite gegenüber abragende Ankerspitze aufweist, kann hierbei gleichzeitig als Abstandshalter für die textile Bewehrung genutzt werden. Mit entsprechenden Abstandhaltern unter der ersten Lage der textilen Bewehrung und einer längeren Spitze unter dem Teller des Schaftankers, einer verlängerten Ankerspitze, ist auch die Verwendung von zwei Textillagen als Bewehrung im Bauteil, dem Betonelement, möglich.The first rod end to be concreted in with the anchor foot, which has an anchor tip protruding outwards, opposite the shaft side, can be used at the same time as a spacer for the textile reinforcement. With appropriate spacers under the first layer of textile reinforcement and a longer one Point under the plate of the shaft anchor, an extended anchor point, it is also possible to use two layers of textile as reinforcement in the component, the concrete element.
Das andere Ende des Schaftankers, das zweite Ende, ermöglicht ebenfalls einen ausreichenden Verbund in der dünnen Textilbetonschale, dem zweiten Betonelement. Da dieses zweite Ende in eine bereits frisch betonierte und mit textiler Bewehrung versehenen Schale eingeführt werden muss, ist es so ausgebildet, dass es beim Auftreffen auf die Bewehrung durch eine Einführspitze von dieser abrutscht und sicher durch die Maschen hindurch geführt werden kann.The other end of the shaft anchor, the second end, also enables a sufficient bond in the thin textile concrete shell, the second concrete element. Since this second end has to be inserted into a shell which has already been concreted and provided with textile reinforcement, it is designed in such a way that when it hits the reinforcement it slips off an insertion tip and can be safely guided through the mesh.
Am gegenüberliegenden Ende, dem zweiten Ende, sind eine Spitze und bevorzugt radiale Lamellen als Formschlusselemente ausgebildet, so dass dieses Ende durch eine textile Bewehrung hindurch in eine zweite Betonschicht, die das zweite Betonelement ausbildet, einbringbar ist. Das zweite Ende des Schaftankers ist damit schlanker ausgebildet. Die Profilierung durch Formschlusselemente sorgt für einen ausreichenden Verbund zum Beton. Eine Spitze am zweiten Ende des Schafts ist derart als eine Einführspitze ausgeführt, dass diese, sollte sie beim Eintauchen auf einen Faserstrang treffen, von diesem abrutscht und durch die Masche des Textils hindurchgeführt wird, ohne die textile Bewehrung niederzudrücken.At the opposite end, the second end, a tip and preferably radial lamellae are formed as form-locking elements, so that this end can be introduced through a textile reinforcement into a second concrete layer that forms the second concrete element. The second end of the shaft anchor is therefore slimmer. The profiling by form-locking elements ensures an adequate bond to the concrete. A tip at the second end of the shaft is designed as an insertion tip that should it hit a fiber strand when immersed, it slips off and is passed through the mesh of the textile without pressing down the textile reinforcement.
Es hat sich als vorteilhaft erwiesen, wenn die mehreckige Kontur viereckig, mit n=4, ausgebildet ist. Dann ist ein maximaler Überstand der Ecken gegenüber den Bewehrungsfasern bzw. unter diesen nach einer Drehung um 45° erreicht. Der Verbund des Schaftankers im Beton wird durch die spezielle Ausbildung der Ankerenden sichergestellt. Das erste Ende des Schaftankers mit dem Ankerfuß, einem bevorzugt quadratischen, tellerförmig flachen Element, wird durch die textile Bewehrung der ersten zu betonierenden Schale hindurchgeführt und anschließend so verdreht, dass das Textil auf dem Ankerfuß aufliegt. Hierdurch wird die Position des Textils im Bauteil gesichert. Die Größe des Ankerfußes ist an die Maschenweite des Textils angepasst. Der Ankerfuß gewährleistet auch den Verbund zum Beton. Die Verfahrensschritte sind unten nochmals zusammengefasst.It has proven to be advantageous if the polygonal contour is square, with n = 4. Then a maximum protrusion of the corners against the reinforcement fibers or below them is reached after a rotation of 45 °. The connection of the shaft anchor in the concrete is ensured by the special design of the anchor ends. The first end of the shaft anchor with the anchor foot, a preferably square, plate-shaped flat element, is passed through the textile reinforcement of the first shell to be concreted and then rotated so that the textile rests on the anchor foot. This secures the position of the textile in the component. The size of the anchor base is adapted to the mesh size of the textile. The anchor base also ensures the bond to the concrete. The process steps are summarized again below.
Weitere Vorteile ergeben sich, wenn der Ankerfuß eine nach der von dem Schaft abgewandten Seite des Ankerfußes abragende Ankerspitze aufweist. Die Spitze unter dem Ankerfuß sorgt für dessen Positionierung und die des Textils in der richtigen Höhe im Bauteil bzw. im vorgesehenen Abstand zur Schalung, zudem fixiert sie den Schaftanker bei der zur Verankerung unter der Bewehrung erforderlichen Drehung an dem vorgesehenen Ort. Durch ihre filigrane Ausführung ist die Spitze an der Oberfläche der fertigen Wandschale nicht sichtbar. Um das Kippen des Ankers zu vermeiden, wird dieser mit einer herkömmlichen Klemme fixiert.Further advantages result if the anchor foot has an anchor tip protruding toward the side of the anchor foot facing away from the shaft. The tip under the anchor foot ensures its positioning and that of the textile at the correct height in the component or at the intended distance from the formwork, it also fixes the shaft anchor at the intended location during the rotation required for anchoring under the reinforcement. Due to their filigree design, the tip is not visible on the surface of the finished wall shell. To prevent the anchor from tipping over, it is fixed with a conventional clamp.
Eine vorteilhafte Ausführungsform umfasst zumindest einen aus Material mit geringer Wärmeleitfähigkeit gebildeten Schaft. Wärmebrücken werden damit durch die Verwendung von einem Material mit geringer Wärmeleitfähigkeit, beispielsweise einem faserverstärkten Kunststoff vermieden. Bevorzugt kommt aus Kostengründen und wegen der hohen Zugfestigkeit glasfaserverstärkter Kunststoff (GFK) zum Einsatz.An advantageous embodiment comprises at least one shaft formed from material with low thermal conductivity. Thermal bridges are thus avoided by using a material with low thermal conductivity, for example a fiber-reinforced plastic. For cost reasons and because of the high tensile strength, glass fiber reinforced plastic (GRP) is preferred.
Vorteilhafterweise ist das erste und/oder das zweite textilbewehrte, flächige Betonelement als Textilbetonelement oder als Carbonbetonelement mit einer Bewehrung aus Carbonfasern, die das Material für die textile Bewehrung darstellen, ausgeführt. Damit können die Vorteile einer textilen Bewehrung genutzt werden und vor allem geringe Wandstärken ohne ein Erfordernis einer Mindestüberdeckung der Bewehrung hergestellt werden. Das erste und/oder das zweite textilbewehrte, flächige Betonelement weist eine Stärke zwischen 1 und 5 cm, bevorzugt zwischen 2 und 4 cm, besonders bevorzugt 3 cm auf.Advantageously, the first and / or the second textile-reinforced, flat concrete element is designed as a textile concrete element or as a carbon concrete element with a reinforcement made of carbon fibers, which represent the material for the textile reinforcement. This enables the advantages of textile reinforcement to be exploited and, above all, small wall thicknesses to be produced without requiring a minimum covering of the reinforcement. The first and / or the second textile-reinforced, flat concrete element has a thickness between 1 and 5 cm, preferably between 2 and 4 cm, particularly preferably 3 cm.
Durch die erfindungsgemäße Ausbildung der Stabenden in der speziellen, vorgesehenen Form werden, im Gegensatz zu herkömmlichen Schaftankern, geringe Einbindetiefen, beispielsweise von lediglich 3 cm, im Beton als ausreichend ermöglicht. Neben dem Verbund im Beton wird mit den Stabenden auch die sichere und beschädigungsfreie Herstellbarkeit bei engmaschiger textiler Bewehrung gewährleistet.The inventive design of the rod ends in the special, intended shape, in contrast to conventional shaft anchors, enables small embedment depths, for example of only 3 cm, in the concrete to be sufficient. In addition to the bond in the concrete, the rod ends also ensure safe and damage-free manufacture with close-meshed textile reinforcement.
Durch die spezielle Ausbildung der Enden, nachfolgend auch Stabenden genannt, können alle nötigen Kräfte auch bei lediglich beispielsweise 3 cm Einbindetiefe in den Beton eingeleitet werden.Due to the special design of the ends, hereinafter also referred to as rod ends, all the necessary forces can be introduced into the concrete, even with an embedment depth of only 3 cm for example.
Ein weiterer Aspekt der Erfindung betrifft ein Verfahren zum Verbinden von flächigen Betonelementen, umfassend eine textile Bewehrung, zu einer Elementwand. Nach der Erfindung werden Schaftanker, wie zuvor beschrieben, verwendet. Jeder der Schaftanker wird in einem ersten Schritt mit seinem Ankerfuß durch eine der Maschenöffnungen der textilen Bewehrung, die bereits in einer Betonageposition aufgelegt ist, geführt. In einem zweiten Schritt wird der Schaftanker um 360/(2n) Grad (bei vier Ecken sind dies 45°) um die Längsachse des Schafts gedreht, sodass er unter der textilen Bewehrung gehalten wird bzw. diese auf Abstand zur Schalung hält. In einem dritten Schritt erfolgen die Betonage des ersten Betonelements in der vorgesehenen Schalung und das Aushärten des Betons. Nach der Betonage des ersten Betonelements kann auf dieses eine Wärmedämmung aufgebracht werden. In einem vierten Schritt erfolgt die Vorbereitung der textilen Bewehrung, die in die Schalung mit den entsprechenden Abstandshaltern eingelegt wird, und dort wird die Betonage des zweiten Betonelements vorgenommen. Unmittelbar danach erfolgt in einem fünften Schritt das Drehen des ersten Betonelements um 180°, ggf. nach Entnahme aus der Schalung, sodass die zweiten Enden der Schaftanker nach unten weisen, und das gedrehte erste Betonelement mit den herausstehenden Schaftankern auf das frisch betonierte zweite Betonelement aufgesetzt wird, das danach aushärtet. Die Betonage kann alternativ auch nach Auflegen des ersten Betonelements auf die Schalung des zweiten Betonelements erfolgen.Another aspect of the invention relates to a method for connecting flat concrete elements, comprising a textile reinforcement, to form an element wall. According to the invention, shaft anchors are used as previously described. Each of the shaft anchors is in a first step with its anchor foot through one of the mesh openings of the textile reinforcement, which is already in a concrete position hung up, led. In a second step, the shaft anchor is rotated 360 / (2n) degrees (for four corners this is 45 °) around the longitudinal axis of the shaft so that it is held under the textile reinforcement or keeps it at a distance from the formwork. In a third step, the first concrete element is concreted in the formwork provided and the concrete is cured. After concreting the first concrete element, thermal insulation can be applied to it. In a fourth step, the preparation of the textile reinforcement is carried out, which is inserted into the formwork with the appropriate spacers, and there the concrete of the second concrete element is carried out. Immediately afterwards, in a fifth step, the first concrete element is turned through 180 °, if necessary after removal from the formwork, so that the second ends of the shaft anchors point downwards, and the rotated first concrete element with the projecting shaft anchors is placed on the freshly concreted second concrete element which then hardens. Alternatively, the concrete can be placed after placing the first concrete element on the formwork of the second concrete element.
Ein weiterer Aspekt der vorliegenden Erfindung betrifft eine Verwendung einer Vorrichtung, wie sie oben beschrieben wurde, zum Verbinden von flächigen Betonelementen zu einer Elementwand. Die Verwendung erfolgt bevorzugt gemäß dem zuvor beschriebenen Verfahren.Another aspect of the present invention relates to the use of a device as described above for connecting flat concrete elements to form an element wall. The use is preferably carried out according to the method described above.
Vorgeschlagen wird nach der vorliegenden Erfindung ein Verbindungselement in Form eines Schaftankers, bevorzugt bestehend aus glasfaserverstärktem Kunststoff (GFK), welcher geometrisch geformte Stabenden aufweist, um einen Halt bei geringer Einbindetiefe im Beton zu gewährleisten. Zugleich werden ein Verfahren zum Einsatz und eine Verwendung des Schaftankers vorgeschlagen. An einem ersten Ende weist der Schaftanker ein Flachelement, den Ankerfuß, auf, wobei die Kontur der Fläche des Flachelements, das sich senkrecht zur Längsausdehnung des Schaftankers erstreckt, an die Maschenweite des Textils angepasst ist. Das Ende des Schaftankers mit dem mehreckigen, vorzugsweise quadratisch konturierten Flachelement, dem Ankerfuß, wird durch eine Maschenöffnung der textilen Bewehrung der ersten zu betonierenden Schale, dem ersten Betonelement der Elementwand, hindurchgeführt und anschließend so verdreht, dass das Textil auf dem Flachelement aufliegt, wodurch die Position des Textils im Bauteil gesichert wird. Weiterhin kann das Flachelement eine Spitze aufweisen, um die Position des Schaftankers zu sichern und den Abstand zur Schalung festzulegen. Das andere Ende des Schaftankers weist ebenfalls eine Spitze, die vor allem als Einführspitze beim Durchdringen der Bewehrung des zweiten Betonelements dient, und mehrere radial angeordnete Lamellen, die als Formschlusselemente im Beton wirken, auf.According to the present invention, a connecting element is proposed in the form of a shaft anchor, preferably consisting of glass fiber reinforced plastic (GRP), which has geometrically shaped rod ends in order to ensure a hold in the concrete with a low embedment depth. At the same time, a method for using and using the shaft anchor is proposed. At a first end, the shaft anchor has a flat element, the anchor foot, the contour of the surface of the flat element, which extends perpendicular to the longitudinal extension of the shaft anchor, being matched to the mesh size of the textile. The end of the shaft anchor with the polygonal, preferably square-contoured flat element, the anchor foot, is passed through a mesh opening in the textile reinforcement of the first shell to be concreted, the first concrete element of the element wall, and then rotated so that the textile rests on the flat element, thereby the position of the textile in the component is secured. Furthermore, the flat element can have a tip in order to secure the position of the shaft anchor and to fix the distance to the formwork. The other end of the shaft anchor also has a tip, which mainly serves as an insertion tip when penetrating the reinforcement of the second concrete element, and a plurality of radially arranged slats, which act as form-locking elements in the concrete.
Der Vorteil der Erfindung besteht in der Ausbildung der Stabenden, welche im Gegensatz zu herkömmlichen Schaftankern Einbindetiefen von in der Regel lediglich 3 cm im Beton ermöglichen. Neben dem Verbund im Beton wird mit den Stabenden auch die Herstellbarkeit bei engmaschiger Bewehrung gewährleistet. Zudem ist eine ausreichend gute Einleitung der auftretenden Kräfte in den Beton im Zwischenraum zwischen den beiden Betonelementen sichergestellt. Außerdem werden Wärmebrücken zwischen den zu verbindenden Schalen, den beiden Betonelementen, vermieden und die Verbindung weist zudem ein geringes Eigengewicht auf.The advantage of the invention consists in the design of the rod ends, which, in contrast to conventional shaft anchors, generally allow anchoring depths of only 3 cm in the concrete. In addition to the bond in the concrete, the rod ends also ensure that it can be manufactured with close-meshed reinforcement. In addition, a sufficiently good introduction of the forces occurring into the concrete in the space between the two concrete elements is ensured. In addition, thermal bridges between the shells to be connected, the two concrete elements, are avoided and the connection also has a low weight.
Anhand der Beschreibung von Ausführungsbeispielen und ihrer Darstellung in den zugehörigen Zeichnungen wird die Erfindung nachfolgend näher erläutert. Es zeigen:
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Fig. 1 : eine schematische perspektivische Darstellung einer Ausführungsform eines erfindungsgemäßen Schaftankers, -
Fig. 2 : eine schematische Seitenansicht einer Ausführungsform eines erfindungsgemäßen Schaftankers, -
Fig. 3 : eine schematische Seitenansicht einer Ausführungsform eines erfindungsgemäßen Schaftankers mit Maßangaben, -
Fig. 4 : eine schematische Ansicht von oben bei der Installation eines erfindungsgemäßen Schaftankers in die Bewehrung und -
Fig. 5 : eine schematische Seitenansicht einer Elementwand unter Einsatz eines erfindungsgemäßen Schaftankers.
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Fig. 1 : a schematic perspective view of an embodiment of a shaft anchor according to the invention, -
Fig. 2 : a schematic side view of an embodiment of a shaft anchor according to the invention, -
Fig. 3 : a schematic side view of an embodiment of a shaft anchor according to the invention with dimensions, -
Fig. 4 : a schematic view from above when installing a shaft anchor according to the invention in the reinforcement and -
Fig. 5 : A schematic side view of an element wall using a shaft anchor according to the invention.
Auch die Einführspitze 14 ist dargestellt. Das zweite Ende 10 ist mit dem ersten Ende 30 über den Schaft 20 verbunden. Der Schaft 20 weist bevorzugt einen rotationssymmetrischen Querschnitt auf, durch den eine Rotationsachse 22 verläuft.The
Der Ankerfuß 31 am ersten Ende 30 verfügt neben den Seiten 32 und den Ecken 34 auch über eine Ankerspitze 36. Diese stützt sich beim Einbau und vor der Betonage des ersten Betonelements 2 (vergleiche
Der Ankerfuß 31 an der ersten Seite 30 des Schaftankers 1 ist demnach 5 mm, die Bewehrung 10 mm mit Beton 8 überdeckt. Die Ausdehnung des Betons 8 im Schnitt beider Betonelemente 2, 6 ist durch eine Strichellinie gekennzeichnet. Die zweite Seite 10 taucht mit wenigstens zwei Lamellen und der Einführspitze 14 in den Beton 8 ein.The
Danach wird der Schaftanker 1 um seine Längsachse so weit gedreht, dass der Ankerfuß 31 mit seinen Ecken 34 hinter der Bewehrung 4 verankert wird. Im dargestellten Ausführungsbeispiel sind n=4 Ecken 34 vorhanden, daher erfolgt eine Drehung um 360°: (2 x 4) = 45°. Dadurch wird der Schaftanker 1 zwischen Bewehrung und Schalung gehalten und zugleich verhindert, dass die Bewehrung 4 auf der Schalung aufliegt und später an der Betonoberfläche in unerwünschter Weise sichtbar erscheint.The
Das erste Ende 30 des Schaftankers 1 mit dem Ankerfuß 31 ist in das erste Betonelement 2 einbetoniert. Das zweite Ende 10 des Schaftankers 1 ist in das zweite Betonelement 6 einbetoniert, wobei ein Teil der Lamellen als eine Ausgestaltung der Formschlusselemente 12 für einen festen Verbund durch Formschluss mit dem Beton 8 sorgen.The
Die so geschaffene Elementwand 9 kann mit dem Abstand X der Oberflächen der Betonelemente 2, 6 und mit hoher Oberflächengüte sowie geringem Gewicht auf die Baustelle transportiert werden. Dort wird der Zwischenraum 7 mit Ortbeton ausgefüllt sodass eine stabile Wand mit hoher Qualität, v. a. der Oberfläche, entsteht. Der Zwischenraum 7 kann auch ganz oder teilweise mit wärmedämmendem Material ausgefüllt werden, sodass ein Wärmeübergang über die fertige Wand erschwert wird. Diesen wärmedämmenden Effekt unterstützt der Schaftanker 1, der in der bevorzugten Ausführungsform zumindest im Bereich des Schaftes 20 aus einem Material mit geringer Wärmeleitfähigkeit besteht. Hierzu wird bevorzugt glasfaserverstärkter Kunststoff (GFK) eingesetzt, der sich zugleich durch eine hohe Festigkeit und niedrige Kosten auszeichnet.
Claims (11)
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Also Published As
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DE102018122202B4 (en) | 2020-03-19 |
DE102018122202A1 (en) | 2020-03-12 |
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