DE102020101125A1 - Positioning means for a textile reinforcement layer of a concrete component, a textile reinforcement layer and a reinforced concrete component, comprising a positioning means - Google Patents

Abstract

The invention relates to a positioning means for at least one textile reinforcement layer (2) of a concrete component (10), the positioning means (1) comprising at least one bolt (4) for assembly essentially perpendicular to the surface of a substrate (3) and at least one spacer (5) , which is connected to the at least one bolt (4) via a recess in the spacer (5) and serves to position the reinforcement layer (2) relative to the surface, the extent of the spacer (5) in the plane of the surface being greater than a mesh size of the reinforcement layer (2), and the spacer (5) in a position on which at least one bolt (4) can be locked. According to the invention, a first end of the at least one bolt (4) is provided for insertion into a substrate (3) for at least positive, force-transmitting anchoring in the substrate (3). The invention also relates to a method for using the positioning means and a concrete component.

Description

The invention relates to a positioning means for at least one textile reinforcement layer of a concrete component, a textile reinforcement layer and a reinforced concrete component, comprising a positioning means. The textile reinforcement layer is designed in particular as a non-metallic reinforcement fabric, for example based on carbon fibers.

Positioning means for a textile reinforcement layer are known from the prior art. They are intended for selective support of one or more reinforcement layers against a formwork or form for concreting. Such positioning means are in the documents DE 20 2013 006 822 U1 , DE 10 2013 015 434 A1 and 10 2017 120 642 A1 described. The ends of the positioning means, which support the reinforcement layer with respect to the formwork and can therefore appear on the later concrete surface, have a minimal surface and, for this purpose, taper to a point, for example. Any kind of connection to the formwork is mostly undesirable; on the contrary, the requirement is that the concrete part should be detached from the formwork as simply as possible.

In contrast, see in the publication KR 20-0231221 Y1 A positioning means with a plate-shaped flange 110, which can also be fixed with pins 150, is described for the formwork 500. The fixation prevents the support from slipping through the positioning means during concreting. The flange 110 visible after the formwork has been removed has an internal thread 140 to which the ceiling structure can later be screwed.

The positioning means known from the prior art are therefore not suitable for use in a permanent formwork or for attaching an additional concrete layer to an existing building element, especially on its underside, and if forces are diverted between the lost formwork or the existing building element in the additional building element Concrete layer and its reinforcement is provided.

It is therefore the object of the present invention to provide a positioning means for at least one textile reinforcement layer of a concrete component, a textile reinforcement layer and a reinforced concrete component, comprising a positioning means, which allows a force transfer between a lost formwork or an existing structural element and the textile reinforcement layer or allows the concrete component.

The object is achieved by a positioning means for at least one textile reinforcement layer of a concrete component. The positioning means comprises at least one bolt for mounting essentially perpendicular to the surface of a substrate and at least one spacer which is connected to the at least one bolt via a recess in the spacer and serves to position the reinforcement layer relative to the surface. The expansion of the spacer in the plane of the surface is greater than a mesh size of the reinforcement layer. The spacer can be locked in one position on the at least one bolt.

According to the invention, a first end of the at least one bolt is provided for insertion into a substrate for at least form-fitting anchoring, with force-fitting anchoring also being provided as an alternative or in addition. The anchoring enables power to be transmitted into the ground.

It has proven to be advantageous if several positioning means can be locked at different positions along the at least one bolt. This means that several reinforcement layers can be positioned and fastened at defined distances from the subsurface and other reinforcement layers.

The spacer or spacers can be screwed to the at least one bolt in the intended position, as a result of which the height of the reinforcement layer or layers with respect to the substrate or to one another can be adjusted.

In order to transfer forces from the reinforcement into the subsurface, it has proven to be advantageous if the at least one bolt can be fastened in a recess, in particular a bore, in the subsurface. In particular, it is provided that the bolt can be screwed in or glued in. A bolt is thus anchored in the old concrete, for example, and a spacer or a differently designed positioning means according to the invention is screwed onto this bolt. The reinforcement layers, for example the non-metallic reinforcement mesh, are put through the mesh on the bolt. If there are several layers, a further spacer is turned on between each layer. The last textile layer is fixed by an anchor head, also preferably equipped with an internal thread, which is larger than the mesh size of the reinforcement. A perforated rail is used for linear fixation. This is inserted through the bolts and fixed with a fixative, e.g. B. nuts fixed.

The anchor head serves as a top cover and prevents the last layer of reinforcement from lifting off the bolts. Another embodiment of the cover as an alternative to the anchor head is as an elongated one with several bolts connected perforated rail running, which extends over several meshes of the reinforcement layer.

The advantages of the invention lie in the possibility of a safe and simple anchoring and fixing of non-metallic reinforcement. This involves a combination of anchoring and creating a spacing, and several textile reinforcement layers can be fixed at the same time. To prevent corrosion, the anchoring parts are non-metallic, e.g. B. made of CFRP. The anchor head can be placed, in particular screwed, onto a second end of the at least one bolt. Further advantages are shown when working overhead, since the textile reinforcement layer is held by the anchoring, the positioning means according to the invention and not otherwise, e.g. B. must be held manually by an additional worker or an auxiliary device.

Another aspect of the present invention relates to a textile reinforcement layer for a reinforced concrete component. According to the invention, the reinforcement layer is mounted by means of positioning means according to one of claims 1 to 5 at a specified distance from a substrate. At least one scrim is preferably provided as the reinforcement layer, but fabrics or other textiles, for example made from carbon, basalt or glass fibers, are also suitable.

The object of the invention is also achieved by a method for installing a textile reinforcement layer by means of a positioning means according to the invention on a substrate, in particular on an existing concrete component or on a permanent formwork. The method provides the following steps: inserting the at least one bolt into the ground, placing at least one positioning means, placing the reinforcement layer and placing the anchor head.

Another aspect of the present invention relates to a concrete component comprising a textile reinforcement layer and a positioning means. The positioning means is designed according to the invention according to one of claims 1 to 5 and anchored directly to a substrate. A particularly advantageous embodiment of the present invention provides that the subsurface belongs to an existing structural element and the concrete structural element comprises the structural element and a concrete-reinforced, textile-reinforced structural component layer. This means that existing components can be renovated or structurally upgraded. The reinforcement lying far on the outside is particularly advantageous, as it does not require a minimum overlap due to the fact that no corrosion-prone metals are used. In addition to the existing component, the subsurface can also belong to a permanent formwork.

Further advantages of the invention consist in securing and anchoring the textile reinforcement layer, an associated spacer, with several layers also being possible, and an overall improved handling of the textile reinforcement.

• 1: eine schematische perspektivische Darstellung einer Ausführungsform eines erfindungsgemäßen Betonbauteils mit einem als Abstandhalter ausgeführten Positioniermittel;
• 2: eine schematische perspektivische Darstellung einer Ausführungsform eines erfindungsgemäßen Betonbauteils mit einem als Lochschiene ausgeführten Positioniermittel;
• 3: eine schematische geschnittene Darstellung einer Ausführungsform eines erfindungsgemäßen Betonbauteils mit Lochschiene und in einer Ausnehmung verschraubtem Bolzen;
• 4: eine schematische geschnittene Darstellung einer Ausführungsform eines erfindungsgemäßen Betonbauteils mit mehreren Bewehrungslagen und
• 5: eine schematische geschnittene Darstellung einer Ausführungsform eines erfindungsgemäßen Betonbauteils mit mehreren Bewehrungslagen im Detail.

The invention is explained in more detail below on the basis of the description of exemplary embodiments and their representation in the associated drawings. Show it:

• 1 : a schematic perspective illustration of an embodiment of a concrete component according to the invention with a positioning means designed as a spacer;
• 2 : a schematic perspective illustration of an embodiment of a concrete component according to the invention with a positioning means designed as a perforated rail;
• 3 : a schematic sectional illustration of an embodiment of a concrete component according to the invention with a perforated rail and a bolt screwed into a recess;
• 4th : a schematic sectional illustration of an embodiment of a concrete component according to the invention with several reinforcement layers and
• 5 : a schematic sectional illustration of an embodiment of a concrete component according to the invention with several reinforcement layers in detail.

1 shows a schematic perspective illustration of an embodiment of a concrete component according to the invention 10 with several as anchor head 8th executed positioning means. A bolt 4th becomes underground 3 , for example old concrete of an existing building element, anchored for power transmission. This can be done, for example, by gluing or by a thread.

On the bolt 4th will be used as a spacer 5 and an anchor head at the top 8th executed positioning means applied, in particular by an internal thread introduced into a bore of the positioning means on the bolt 4th , which has an external thread, screwed on.

The reinforcement layer 2 , in particular a non-metallic reinforcement mesh, is after application of the first positioning means through the mesh on the bolt 4th plugged. With several layers of reinforcement 2 another spacer is placed between each layer 5 turned up. The last layer of reinforcement 2 is by an anchor head 1 , which also has an internal thread and which, like the spacers 5 is larger in diameter than the mesh size of the reinforcement layer 2 , fixed. In the case of linear fixation, a perforated rail is used for fixation 6th used. This is done by the bolt 4th inserted and fixed with nuts or split pins, for example.

The invention provides an advantageous anchoring and fixing of reinforcement layers 2 , especially non-metallic reinforcement, especially on the subsurface 3 and can be achieved with the introduction of force into them. There is a combination of anchoring and spacing and several textile reinforcement layers can be fixed at the same time. All illustrations show the concrete element 10 before concreting.

2 shows a schematic perspective illustration of an embodiment of a concrete component according to the invention 10 as in 1 , but with one as a perforated rail 6th executed positioning means. The elongated cover through the perforated rail 6th enables greater variability in the mesh size of the reinforcement layer 2 .

3 shows a schematic sectional illustration of an embodiment of a concrete component according to the invention 10 with perforated rail 6th and in a recess 7th screwed bolt 4th . The spacing of the reinforcement layer 2 to the underground 3 , here the surface of an existing component, is supported by the spacer 5 defined while a lifting of the reinforcement layer 2 from the bolt 4th through the anchor head 8th is prevented.

4th shows a schematic sectional illustration of an embodiment of a concrete component according to the invention 10 , as well as in 3 , but in a version with several positioning means and several reinforcement layers 2 . There is a spacer in each case 5 between the underground 3 and between the first and second reinforcement layers 2 intended. The top termination on the bolt 4th forms the anchor head 8th .

5 shows a schematic sectional illustration of an embodiment of a concrete component according to the invention 10 with several positioning means and several reinforcement layers 2 , as well as in 4th , but here in a detailed representation. There is a spacer in each case 5 between the underground 3 and between the first and second reinforcement layers 2 provided, which are supported on projections protruding from the surface on both sides. This creates the intended distance between the reinforcement layers 2 and to the underground 3 guaranteed without affecting the reinforcement layer 2 is loaded, neither on pressure nor, due to a recess between the projections in the spacer 5 , on bend. The anchor head also forms the end here 8th which is also the thread of the bolt 8th covers and protects.

The bolt 4th is different from the 3 and 4th not in the recess 7th screwed in, but glued in place. This simplifies production and, in the case of certain materials, also increases the strength, which leads to increased power transmission.

List of reference symbols

1

Positioning means

2

Reinforcement layer

3

Subsurface, structural element, permanent formwork

4th

bolt

5

Spacers

6th

Perforated rail

7th

Recess

8th

Anchor head

10

Concrete component

QUOTES INCLUDED IN THE DESCRIPTION

This list of the documents listed by the applicant was generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Patent literature cited

• DE 202013006822 U1 [0002]
• DE 102013015434 A1 [0002]
• DE 102017120642 A1 [0002]
• KR 200231221 Y1 [0003]

Claims (11)

Positioning means for at least one textile reinforcement layer (2) of a concrete component (10), the positioning means (1) comprising at least one bolt (4) for assembly essentially perpendicular to the surface of a substrate (3) and at least one spacer (5), which is connected to the at least one bolt (4) is connected via a recess in the spacer (5) and is used to position the reinforcement layer (2) relative to the surface, the extent of the spacer (5) in the plane of the surface being greater than a mesh size of the reinforcement layer (2), and the spacer (5) can be locked in a position on which at least one bolt (4) can be locked, characterized in that a first end of the at least one bolt (4) for insertion into a substrate (3) for at least positive Force-transmitting anchoring is provided in the subsurface (3). Positioning means according to Claim 1 , wherein a plurality of spacers (5) are provided and can be locked along the at least one bolt (4) in a position relative to one another on the bolt (4). Positioning means according to Claim 1 or 2 , wherein the spacer (5) can be screwed to the at least one bolt (4) in the intended position. Positioning means according to one of the preceding claims, wherein the at least one bolt (4) can be fastened in a recess in the substrate (3). Positioning means according to one of the preceding claims, wherein an anchor head (8) or a perforated rail (6) can be placed on a second end of the at least one bolt (4), the anchor head (8) being round in the shape of a plate, with the at least one bolt (4) is connectable and designed with an internal thread covered on one side and the perforated rail (6) is elongated in the plane of the surface of the substrate (3), is designed to be connectable with several bolts (4) and extends over several meshes of the reinforcement layer (2). Textile reinforcement layer for a reinforced concrete component, characterized in that the reinforcement layer by means of positioning means (1) after a Claims 1 until 5 is mounted at a specified distance from a surface. Reinforcement position according to Claim 6 , whereby at least one scrim is provided as the reinforcement layer. Method for installing a textile reinforcement layer by means of a positioning means (1) after a Claims 1 until 5 to an existing structural element, characterized by the steps of • inserting the at least one bolt (4) into the substrate (3), • placing at least the spacer (5), • placing the reinforcement layer (2) and • placing the anchor head (8) or the perforated rail (6). Concrete component, comprising a textile reinforcement layer (2) and a positioning means (1), characterized in that the positioning means (1) according to one of the Claims 1 until 5 is executed and anchored directly to a substrate (3). Concrete component according to Claim 9 , wherein the substrate (3) belongs to an existing building element and the concrete component comprises the building element and a concrete-reinforced, textile-reinforced component layer. Concrete component according to Claim 9 , the subsurface (3) belonging to a lost formwork.

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