DE102021108011A1 - Sealing arrangement and method for sealing anchor holes - Google Patents

Abstract

The present invention relates to a closure arrangement for closing anchor holes in concrete components, in particular in double-sided concrete walls. The closure arrangement comprises a closure plug, which has a substantially cylindrical or conical shape with two end faces and a lateral surface, and a retaining element, which is connected to the closure plug and extends from one of the end faces in the form of a thread or rod. The invention also relates to a Method for closing an anchor hole in a concrete member using such a closure arrangement.

Description

The present invention relates to a closure arrangement for closing anchor holes in concrete components, in particular in double-sided concrete walls.

The invention also relates to a method for closing an anchor hole in a concrete component using such a closure arrangement.

The two-sided formwork system is most commonly used in the manufacture of vertical concrete components, i.e. walls made of concrete or reinforced concrete. The two opposing formwork elements must be connected to one another by a large number of formwork anchors so that they can withstand the hydrostatic pressure of the fresh concrete and the dimensional accuracy of the concrete component produced is guaranteed.

After the formwork anchors have been removed and the formwork stripped from the concrete component, so-called anchor holes remain in the component at the appropriate points, which completely penetrate the component. Such anchor holes must be closed so that the concrete component can meet the existing requirements in terms of water tightness, fire protection, sound insulation, etc. This is usually done by filling the anchor holes with a suitable material such as cement or mortar, whereby the anchor hole on one side of the concrete component is first closed with a plug and then the filling material is pressed in from the other side.

The filling of the anchor holes represents a considerable amount of work and time, especially because with the procedure described, each individual hole has to be processed from both sides of the wall. Since the wall is typically not scaffolded at this stage of construction, most of the higher anchor holes can only be reached with the help of a ladder or a lift truck.

The invention is therefore based on the object of proposing a device and a method with which anchor holes can be closed more quickly and efficiently.

• - einen Verschlussstopfen, der eine im Wesentlichen zylindrische oder konische Form mit zwei Stirnflächen und einer Mantelfläche aufweist; und
• - ein Rückhalteelement, das mit dem Verschlussstopfen verbunden ist und sich ausgehend von einer der Stirnflächen faden- oder stabförmig erstreckt.

In the case of the closure arrangement of the type mentioned at the outset, this object is achieved according to the invention in that the closure arrangement comprises:

• - A stopper, which has a substantially cylindrical or conical shape with two end faces and a lateral surface; and
• - A retaining element which is connected to the closure plug and extends from one of the end faces in the form of a thread or rod.

The closure arrangement according to the invention makes it possible to insert the closure plug from the same side of the concrete component from which the anchor hole is then filled. Each anchor point therefore only has to be processed from one side, which significantly speeds up the process overall.

According to the invention, the sealing plug is inserted in such a way that the retaining element extends through the anchor hole and out of the insertion opening. With the help of the retaining element, on the one hand it can be prevented that the sealing plug is pushed too far (and in extreme cases it falls out of the anchor hole on the other side of the component), and on the other hand the retaining element prevents the sealing plug from falling out when the anchor hole is being filled is pressed further or pushed out by the filling material.

By using the closure arrangement according to the invention, the working time can be reduced by approximately half compared to the known method, in which work has to be carried out from both sides of the concrete component. In relation to the large number of concrete components that are produced using double-sided formwork, there is the potential for overall considerable cost savings. Assuming a time saving of four minutes per anchor hole and a wage of 35 euros per hour, a rough estimate results in a possible savings potential of up to 25 million euros per year in Germany.

The retaining element is a thread or rod-shaped element and is typically a multiple of the length of the plug, preferably five to fifteen times, depending on the length of the plug. With respect to the concrete member on which the locking arrangement is intended to be used, the length of the retainer shall be at least the thickness of the member plus a sufficient length to be able to grip or fix the retainer when the plug is fully inserted into the anchor hole .

In the simplest case, the restraining element can be a cord, which makes it possible to pull back the sealing plug and to prevent it from being pushed further (during insertion or during filling). to back up. In this case, the sealing plug is inserted with a suitable tool, eg using a meter rule, which can then be used to check the planned insertion depth of the sealing plug. However, the insertion depth also results from the total length of the retaining element minus the length of the protruding part.

However, it is preferred if the retaining element is a wire or a metal strip. Such a wire or sheet metal strip can consist in particular of steel, although in principle other dimensionally stable and non-combustible materials are also possible. The additional advantage is that such a retaining element has sufficient rigidity to be able to insert the sealing plug into the anchor hole without any other aid. A further advantage is that the wire or sheet metal strip can be bent over after it has been inserted, so that the bent part rests against the concrete component. The sealing plug is thus secured in a very simple manner against being pushed further when the anchor hole is being filled.

It is also preferred if the retaining element has optical and/or haptic markings at regular intervals along its longitudinal direction. With the help of such markings, the intended insertion depth of the sealing plug can be set without a meter rule or the like also being required. For example, the markings can be arranged every 5 cm on the retaining element, this will generally allow sufficient accuracy when positioning the sealing plug.

The wire or sheet metal strip should be sufficiently stiff to be able to insert the sealing plug into the anchor hole and on the other hand sufficiently flexible to be able to bend it by hand after insertion. In the case of a wire, this preferably has a diameter of 1 to 2 mm.

The retaining element preferably has a length of 20 to 50 cm, more preferably 30 to 40 cm. In general, the length of the retaining element is based on the wall thickness of the concrete components, as already explained above. The protruding part of the retaining element is removed after the anchor hole has been filled.

The closure plug preferably has a length of 2 to 7 cm, more preferably 3 to 6 cm. Taking the diameter into account, the sealing plug should always be long enough to prevent tilting when inserted into the anchor hole.

The diameter of the sealing plug is based on the diameter of the anchor hole to be sealed and is preferably from 2 to 5 cm, more preferably from 3 to 4 cm. It should be noted that the diameter of the sealing plug should be around 1 to 5 mm smaller than the diameter of the anchor hole so that the air can escape through the annular gap that is created when the anchor hole is filled.

So that the air can escape next to the sealing plug when the anchor hole is being filled, the latter preferably has a substantially smooth lateral surface. In particular, the outer surface of the sealing plug does not have any sealing lamellae or the like, as are often provided in sealing plugs according to the prior art. These known sealing plugs must be relatively tight so that they are not pushed out when filling, they are then provided with small holes to allow the air to escape. In comparison to this, the closure plug of the closure arrangement according to the invention has a much simpler structure.

In the most common formwork anchor design, a cylindrical sleeve tube is used, through which the actual formwork anchor runs in the form of a threaded rod. In this case, the anchor hole is cylindrical with a substantially constant diameter, and the sealing plug according to the invention also has a substantially cylindrical shape. There are also systems with conical formwork ties, where the conicity is usually so small (e.g. in the range of 1%) that such conical tie holes can also be closed from both sides with a cylindrical plug.

Alternatively, it is also conceivable to adapt the shape of the sealing plug to that of the conical anchor hole and to only provide for the introduction from the side with the larger opening diameter. In this embodiment of the invention, the plug has a generally conical shape and the retaining element extends from the larger face.

The closure plug of the closure arrangement according to the invention can consist of different materials. The stopper is preferably made of cement, in particular fiber cement, plastic or a combination of these materials. Also possible, but less preferred, are plugs made of wood or metal.

In the closure arrangement according to the invention, the retaining element is firmly connected to the closure plug, with the retaining element preferably extending into the interior of the closure plug. Accordingly, the end of the retaining element is cast into the respective material when the sealing plug is made from cement or from plastic.

• - Einführen einer erfindungsgemäßen Verschlussanordnung in das Ankerloch von einer ersten Seite des Betonbauteils aus, so dass sich der Verschlussstopfen in der Nähe einer zweiten Seite des Betonbauteils befindet und sich das Rückhalteelement durch das Ankerloch erstreckt;
• - Verfüllen des Ankerlochs von der ersten Seite aus mit einem Füllmaterial; und
• - Entfernen eines über die erste Seite des Betonbauteils herausragenden Teils des Rückhalteelements.

With regard to the method mentioned at the outset, the object on which the invention is based is achieved in that the method comprises the following steps:

• - Inserting a closure arrangement according to the invention into the anchor hole from a first side of the concrete member, so that the closure plug is in the vicinity of a second side of the concrete member and the retaining element extends through the anchor hole;
• - filling the anchor hole from the first side with a filling material; and
• - removing a part of the retaining element protruding over the first side of the concrete member.

Significant advantages and preferred embodiments of the method according to the invention have already been explained in connection with the closure arrangement according to the invention.

In a preferred embodiment of the method, in which the retaining element is a wire or a sheet metal strip, the retaining element is bent over after the insertion of the closure arrangement and before the anchor hole is filled in such a way that it essentially rests against the first side of the concrete component and further movement of the sealing plug in the direction of the second side of the concrete component is prevented.

If the anchor hole has a substantially constant diameter or a slightly conical shape, the sealing plug preferably has a substantially cylindrical shape. The diameter of the anchor hole is larger than the diameter of the sealing plug, preferably by 1 to 5 mm. As explained above, the air can escape through the annular gap that occurs when the anchor hole is filled.

Alternatively, if the anchor hole has an essentially conical shape, the use of a conical sealing plug is also conceivable, as already described above.

The sealing plug can be inserted so far that it is flush with the second side of the concrete component, or that the sealing plug is set back inwards from the second side, preferably by 5 to 20 mm. If necessary, the corresponding depression can be filled in at a later stage of construction (e.g. when plastering the wall), provided the second side of the concrete component is a visible side.

The present invention also relates to the use of a closure arrangement according to the invention for closing anchor holes in concrete components, in particular in double-sided concrete walls.

The exemplary embodiments described below serve to explain the invention further without restricting it in any way.

• 1: eine schematische Darstellung eines ersten Ausführungsbeispiels einer erfindungsgemäßen Verschlussanordnung;
• 2: eine schematische Darstellung eines zweiten Ausführungsbeispiels einer erfindungsgemäßen Verschlussanordnung; und
• 3: schematische Querschnittsdarstellungen eines Ankerlochs zur Illustration des erfindungsgemäßen Verfahrens.

In the drawings show:

• 1 : a schematic representation of a first exemplary embodiment of a closure arrangement according to the invention;
• 2 : a schematic representation of a second exemplary embodiment of a closure arrangement according to the invention; and
• 3 : schematic cross-sectional representations of an anchor hole to illustrate the method according to the invention.

the 1 shows a schematic representation of a first exemplary embodiment of a closure arrangement 10 according to the invention for closing cylindrical or slightly conical anchor holes in concrete components. The closure arrangement 10 comprises a closure stopper 12 with a substantially cylindrical shape, which has a front end face 14 , a rear end face 16 and a lateral surface 18 . The stopper 12 can be made of fiber cement or plastic, for example.

The closure assembly 10 further includes a retaining member 20 connected to the closure plug 12 and extending from the rear face 16 . The retaining element 20 is, for example, a wire which has a multiple of the length of the sealing plug 12 . For example, the stopper 12 can have a length of approximately 5 cm and the retaining element 20 can have a length of approximately 40 cm, the illustration in the figure not being true to scale.

One end of the retainer 20 extends into the interior of the plug 12, and the plug assembly 10 may be made by potting the retainer 20 into the fiber cement of the plug 12, for example.

The retaining element 20 has optical markings 22 at regular intervals, with the help of which the depth of insertion of the sealing plug 12 into an anchor hole can be easily determined.

the 2 shows a schematic representation of a second exemplary embodiment of a closure arrangement 24 according to the invention for closing conical anchor holes in concrete components. In contrast to the first exemplary embodiment, the sealing plug 12 of the sealing arrangement 24 is not cylindrical but has a conical shape, with the front end face 14 having a smaller diameter than the rear end face 16. The sealing plug is dimensioned in such a way that when it is inserted into a conical anchor hole with approximately the same opening angle can be inserted up to the side of the component with the smaller opening or up to just before this opening.

the 3A , 3B and 3C show different steps of the method according to the invention for closing an anchor hole in a concrete component, namely a cylindrical anchor hole using the closure arrangement 10 according to FIG 1 . The representations of the concrete wall, anchor hole and locking arrangement are schematic and not to scale.

3A shows the concrete component 26 with the anchor hole 28 in cross section after the closure arrangement 10 according to the invention has been introduced into the anchor hole 28 in the first step of the method. It is introduced in a simple manner with the aid of the retaining element 20 , with the sealing plug 12 being pushed into the anchor hole 28 from the first side 30 of the concrete component 26 until it is flush with the second side 32 of the concrete component 26 . Alternatively, it is also possible to advance the sealing plug 12 only far enough that it is set back a little inwards from the second side 32 .

After the plug 12 has been inserted to the desired position, which can be easily determined using the markings 22 on the retaining element 20 , the retaining element 20 is bent over so that it lies against the first side 30 of the concrete component 26 . This state is in the 3B shown. As a result, the closure plug 12 is secured against further displacement in the direction of the second side 32 .

The anchor hole 28 can then be filled with a filling material 34 , for example with cement, mortar or another mineral building material, the filling material 34 being introduced into the anchor hole 28 from the first side 30 of the concrete component 26 . Since the air escapes through the annular gap between the sealing plug 12 and the inside of the anchor hole 28, the anchor hole 28 can be completely filled. After the filling, the section of the retaining element 20 protruding on the first side 30 is cut off. The resulting final state is in the 3C shown.

Reference List

10

shutter assembly

12

sealing plug

14

front face

16

rear face

18

lateral surface

20

restraint element

22

markings

24

shutter assembly

26

concrete component

28

anchor hole

30

first page

32

second page

Claims (18)

Closure arrangement (10; 24) for closing anchor holes (28) in concrete components (26), comprising - A closure plug (12) having a substantially cylindrical or conical shape with two end faces (14, 16) and a lateral surface (18); and - A retaining element (20) which is connected to the sealing plug (12) and extends from one of the end faces (16) in the form of a thread or rod. Closure arrangement (10; 24) according to claim 1 , wherein the retaining element (20) has a multiple of the length of the closure plug (12), preferably five to fifteen times. Closure arrangement (10; 24) according to claim 1 or 2 , wherein the restraining element (20) is a cord. Closure arrangement (10; 24) according to claim 1 or 2 , wherein the retaining element (20) is a wire or a metal strip, in particular made of steel. Closure arrangement (10; 24) according to claim 4 , the wire having a diameter of 1 to 3 mm. Closure arrangement (10; 24) according to one of the preceding claims, wherein the retaining element (20) has optical and/or haptic markings (22) at regular intervals along its longitudinal direction. Closure arrangement (10; 24) according to one of the preceding claims, wherein the retaining element (20) has a length of 20 to 50 cm, preferably of 30 to 40 cm. Closure arrangement (10; 24) according to one of the preceding claims, wherein the closure plug (12) has a length of 2 to 7 cm, preferably 3 to 6 cm. Closure arrangement (10; 24) according to one of the preceding claims, wherein the closure plug (12) has a diameter of 2 to 5 cm, preferably 3 to 4 cm. Closure arrangement (10; 24) according to one of the preceding claims, wherein the closure plug (12) has a substantially smooth lateral surface (18), in particular without sealing lamellae or the like. A closure assembly (24) according to any one of the preceding claims, wherein the closure plug (12) has a substantially conical shape and the retaining element (20) extends from the larger face (16). Closure arrangement (10; 24) according to one of the preceding claims, wherein the closure plug (12) is made of cement, in particular fiber cement, of plastic or of a combination of these materials. A closure assembly (10; 24) according to any one of the preceding claims, wherein one end of the retaining element (20) extends into the interior of the closure plug (12). Method for closing an anchor hole (28) in a concrete component (26), comprising the steps: - Inserting a closure arrangement (10; 24) according to any one of the preceding claims into the anchor hole (28) from a first side (30) of the concrete component (26) so that the closure plug (12) is located in the vicinity of a second side (32 ) of the concrete member (26) and the retaining member extends through the anchor hole (28); - Filling the anchor hole (28) from the first side (30) with a filling material (34); and - removing a part of the retaining element (28) protruding over the first side (30) of the concrete component. procedure after Claim 14 , wherein after the insertion of the closure arrangement (10; 24) and before the anchor hole (28) is filled, the retaining element (20) is bent over in such a way that it rests essentially on the first side (30) of the concrete component (26) and another Movement of the plug (12) in the direction of the second side (32) of the concrete member (26) is prevented. procedure after Claim 14 or 15 , wherein the closure plug (12) has a substantially cylindrical shape and the anchor hole (28) has a diameter that is larger than the diameter of the closure plug (12), preferably by 1 to 5 mm. Procedure according to one of Claims 14 until 16 , wherein the sealing plug (12) is either inserted so far that it is flush with the second side (32) of the concrete component (26), or that the sealing plug (12) is set back inwards from the second side (32), preferably by 5 to 20 mm. Use of a closure arrangement (10; 24) according to one of Claims 1 until 13 for closing anchor holes (28) in concrete components (26). * * *

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