EP2787135A1 - Concrete components and method for erecting the same - Google Patents

Abstract

The present invention relates to a method for constructing a reinforced concrete component of a building, preferably an upright concrete wall, from a plurality of individual components (10, 10 ') of respectively reinforced concrete, in particular precast concrete elements, with the following measures: (a) at least one first reinforced individual component (10, 10 ') is produced with, in part, inside the individual component (10, 10'), in particular outside the individual component (10, 10 ') extending, in particular elongated connecting reinforcement elements (18, 18 '), (b) at least one second reinforced individual component (10, 10 ') is produced, wherein during the manufacturing process in the second individual component (10, 10') to the particular elongated connection reinforcement elements (18, 18 ') of the first individual component (10, 10' ) adapted holes (14, 14 ') are introduced, (c) at the erection site of the concrete component or the structure, the individual components (10, 10 ') are mounted in such a way that the in particular elongated connection reinforcement elements (18, 18') of the first individual component (10, 10 ') are inserted into the holes (14, 14 ') of the second individual component (10, 10') intervene, (d) the holes (14, 14 ') of the second individual component (10, 10') are provided with a connecting reinforcement element (18, 18 ') for a bond between the respective hole wall and the respective connection reinforcement element (18, 18') arranged in the hole (14, 14 '). caring, preferably cement-bonded grout (20) filled. The invention furthermore relates to a concrete component that can be erected using the method and to an individual component as part of such a concrete component.

Description

The present invention relates to a reinforced concrete component of a building, a method for the construction of such a concrete component and individual components as components of the concrete component.

Highly loaded, strong-rated concrete components, such as concrete walls of high-rise buildings with continuous reinforcement over all floors, are usually produced at the location of the building or the high-rise building by means of local formwork. The production of the necessary formwork construction and the appropriate concreting on site is time consuming and costly.

There is therefore a need to be able to produce such and other large-sized, heavily reinforced concrete components at a lower cost.

On this basis, it is an object of the invention to further develop the conventional construction of reinforced concrete components.

This object is achieved by a method having the features of claim 1, by a reinforced concrete component having the feature of claim 9 and a single component made of reinforced concrete as part of a concrete component according to claim 13. According to the invention, a method is accordingly provided for erecting a reinforced concrete component of a structure, in particular an upright, reinforced concrete wall, wherein the concrete component is composed of several reinforced individual components.

At least one individual component of the concrete component is thereby provided during its production with partially in the individual component, partly outside of the single component extending connection reinforcement elements. These are regularly elongated, in particular rod-shaped, for example, as conventional reinforcing steel rods. This single component is preferably prefabricated as precast concrete, preferably in a corresponding precast plant. In principle, however, the training as Ortbetonbauteil is conceivable with appropriate concreting at the place of construction of the concrete component. This particular, if this single component serves as the lowest component of the concrete component to be built, such as in an upright concrete wall.

Also preferred (but not mandatory) as precast concrete element is at least one further reinforced individual component of the concrete component to be produced. During the manufacturing process of this further single component holes are introduced into this by means of appropriate formwork. These holes arranged on one component side or ending there are adapted to the abovementioned first individual component or the connecting reinforcement elements of the first individual component. This is such that its connection reinforcement elements can each be inserted into the respective holes of the further individual component or fit into it. In this case, a connection reinforcement element is preferably assigned in each case to a hole.

As already indicated above, the two individual components are otherwise reinforced in the usual way, i. provided in the production with per se known reinforcement (reinforcement mats, reinforcing bars or the like). Conveniently, they are formed as otherwise conventional reinforced concrete parts. Naturally, however, it is also conceivable, for example, to use other reinforcing materials instead of steel reinforcements for reinforcement of the respective individual component.

At the construction site of the concrete component or the structure, the individual components produced in the manner described are mounted or put on or to each other, that the connection reinforcement elements of a single component (naturally - or partially - only their lying outside the respective individual component sections) come to rest in the holes of the other component.

For this purpose, one of the individual components is suitably moved toward the respective other individual component. If, for example, one of the two individual components is already at the location of the later concrete component or already arranged or installed at its final destination in the later concrete component, but the other is not, the latter can - for example by means of a crane or the like - the already installed Individual component can be approximated or guided to this under "threading" of the respective connection reinforcement elements in the respectively associated holes.

This possibly so that the one side of a single component, in which the holes are arranged, as well as that side of the other single component, from which protrude the connecting reinforcement elements, finally touch and come to rest or lie against each other.

As a rule, before the two prefabricated individual components are mounted or approximated in the described manner, ie before the connection reinforcement elements are in the holes, they are filled with a preferably cement-bonded grout. The grout should have the highest possible flowability, a fast strength development and a high final strength.

This grout then provides in the cured state for a particular frictional bond between the respective hole walls of a single component and the associated hole or arranged in the respective hole connecting reinforcement element.

As an alternative to the above-described approximation of the individual components to the contact of the corresponding side surfaces, the approach can also take place only up to a certain distance of the individual components. In such a way that the connection reinforcement elements are already in the holes, but at the same time a narrow gap remains between the two individual components. This joint will later be filled with bonding compound, usually also with preferably cementitious grout.

At least theoretically, as an alternative to the above-described filling of the holes with potting compound, before the connection reinforcement elements are in the holes, also conceivable to make this filling of the holes only in the assembled state of the individual components or when both individual components are already in their final position in the concrete component to be produced and accordingly the connection reinforcement elements are already arranged in the holes. For this purpose, the holes would still need to be sufficiently accessible at this time. This prerequisite is at least theoretically possibly to be met if between the two individual components in the manner described above nor the later to be filled with bonding compound gap.

In addition, the concrete component to be erected will generally have a plurality of, in particular, identical individual components, in which the connection reinforcement elements described in each case protrude on one component side, but at the same time the described holes are arranged on another component side.

Expediently, these component sides can be opposing sides of the respective individual component, in particular in the case of cuboidal individual components. Each connection reinforcing element of such a component is assigned a corresponding hole on the opposite side of the component. At least the protruding from the one side portions of the connecting reinforcement elements of the same are each arranged in such a way that they are in each case aligned with the respectively associated, arranged on the opposite side of the component holes. In particular, the corresponding longitudinal center axis of the respective hole is aligned with the longitudinal central axis of the respective protruding portion of the respective connecting reinforcement element, in particular insofar as it is a rod-shaped reinforcing elements and correspondingly elongated holes.

In a particularly relevant embodiment of the present invention, concretely, an upright, heavily reinforced concrete wall of a structure in the manner described above has a plurality of stacked (vertically extending) single wall components. In this case, the connecting reinforcement elements would regularly protrude from the respective lower sides of the single-wall components, and the holes would be assigned to the respective upper sides of the individual-wall components or introduced into these.

The lowest individual component of the concrete wall could be expediently designed as Ortbetonteil with arranged on its upper side holes. It can be a (vertical) single wall component or the foundation of the concrete wall. In this single component, which is expediently, but of course not necessarily, prefabricated as in-situ concrete part, there are regularly unnecessary from the bottom underside, adapted to corresponding holes of one of the other aforementioned individual wall components connection reinforcement elements.

At the construction site of the concrete wall then the single wall components are mounted one after the other from bottom to top. In other words (under threading of the connection reinforcement elements in the associated, preferably already filled with grout holes) each further above to be arranged individual component lowered to the already installed at the destination or located in the concrete wall, each directly below this arranged individual component. This is usually done by means of a crane.

It can optionally be provided in the manner already indicated above, that in each case temporarily remains a narrow, in this case horizontally extending gap between the respective individual components. As a rule, by holding the upper component to be installed by means of spacers or spacer blocks or the like in a corresponding position. The joint is then then filled with the bonding compound or grout.

According to a particularly important aspect of the invention, elongate reinforcing elements for forming an overlapping joint are introduced into the individual component which has the holes, in particular during its production adjacent to the holes. These reinforcing elements for forming an overlapping joint are positioned in this case, namely as a rule adjacent to the holes, in particular in addition to these, that they form an overlapping joint in the mounted state of the two individual components with the connection reinforcement elements then arranged in the filled holes. In other words, the terminal reinforcing elements disposed in the holes and the reinforcing elements for forming the lap joint are juxtaposed and overlapped in the lap joint area.

Regularly, for this purpose, the connection reinforcement elements of a single component on the one hand and the reinforcing elements for forming the overlap joint of the other individual component on the other hand, at least in the region of the overlap joint be rod-like. Advantageously, said reinforcing elements in this area run parallel or at least approximately parallel to one another.

Incidentally, the reinforcing elements for forming the overlapping joint may also be the connection reinforcing elements which partially protrude from the individual component and partly run in this connection element. In this case, they would be in the interior of the single component simply continue to be led into the overlapping joint area. This is particularly easy to implement when the connecting reinforcement elements are elongated reinforcing bars.

In a special way, the holes are introduced into this during the production or the concreting of the corresponding individual component. For this purpose, a multi-part formwork is used for each hole. The formwork has a flexible, preferably elastic, thin formwork skin. The formwork skin defines the contour of the later hole. It can for example consist of rigid PVC or sheet steel.

It encloses during the concreting an inner, dimensionally stable or rigid packing, which stabilizes the formwork against the pressure exerted by the liquid or pasty concrete pressure and / or fixed in position. In other words, the filler or its outer surface is at least partially on the inside of the formwork during the concreting and stabilizes it.

Advantageously, the filler protrudes laterally from the individual component to be concreted or projects beyond the corresponding (later) component side to the outside, so that it can be easily gripped by a worker after the concrete has hardened. As part of the later Ausschallvorgangs the filler is then first pulled out of the hole. As a result, its formwork stabilizing effect continues and the formwork peels off from the corresponding, adjacent to this Betonlochwandung or can be easily solved by this and pulled out of the hole.

In order to facilitate the extraction of the filling body, the outside of which is smooth-walled at least in the areas which rest on the formwork skin. Conveniently, the entire outside is smooth.

As far as the packing shape is concerned, it is preferably substantially cylindrical, at least the part which is located in the hole.

Preferably, the formwork skin of the formwork is prestressed in the position fixed by the filling body. When pulling out the filler then eliminates the back pressure of the packing. The elastic force or the spring force of the formwork skin is preferably to be designed in such a way that it can then overcome the adhesion of the perforated wall concrete to the formwork surface. This allows the formwork to be removed from the hole with very little effort.

Further features of the present invention will become apparent from the appended claims, the following description of preferred embodiments and from the accompanying drawings.

Fig. 1

einen Schnitt durch ein erfindungsgemäßes Einzelbauteil mit der einen Bauteilseite (Oberseite) zugeordneten Löchern zur Aufnahme von Anschlussbewehrungselementen sowie mit aus der gegenüberliegenden Bauteilseite (Unterseite) herausragenden Anschlussbewehrungselementen,

Fig. 2

einen Teilschnitt durch zwei übereinander angeordnete Einzelbauteile eines Bereichs, in dem in einem Loch des unteren Einzelbauteils ein Anschlussbewehrungselemente des oberen Einzelbauteils sitzt,

Fig. 3 a)-c)

jeweils Prinzipskizzen (Schnittdarstellungen) verschiedener, zeitlich aufeinander folgender Fertigungsschritte im Zusammenhang mit dem Einbringen von erfindungsgemäßen Löchern mittels Schalung während der Herstellung eines Einzelbauteils,

Fig. 4 a)-c)

Prinzipskizzen entsprechend Fig. 3 a) - c) als Draufsichten,

Fig. 5 a)-c)

Prinzipskizzen entsprechend der Fig. 4 a) - c), allerdings bei Verwendung einer alternative Schalung für das Einbringen der Löcher.

It shows

Fig. 1

3 a section through an individual component according to the invention with the holes associated with one component side (upper side) for receiving connection reinforcement elements and with connecting reinforcement elements projecting from the opposite component side (lower side),

Fig. 2

a partial section through two superimposed individual components of a region in which sits in a hole of the lower individual component, a connection reinforcing elements of the upper single component,

Fig. 3 a) -c)

in each case schematic sketches (sectional representations) of different successive production steps in connection with the introduction of holes according to the invention by means of formwork during the production of a single component,

Fig. 4 a) -c)

Schematic diagrams accordingly Fig. 3 a) - c) as plan views,

Fig. 5 a) -c)

Schematic diagrams according to Fig. 4 a) - c) , however, when using an alternative formwork for the insertion of the holes.

In FIG. 1 For example, a single component 10 made of reinforced concrete is shown. In the present case, this is a wall component of a vertical or upright reinforced concrete wall to be erected. In the present case, the individual component 10 is a prefabricated component and has already been prefabricated, for example in a corresponding precast component factory.

As part of the production of the same were in later to be explained in more detail manner in the one component side 12, in this case in the top of the component, elongated, in particular cylindrical, holes 14 introduced.

From the opposite side of the component 16, namely the underside of the component, projecting individual connection reinforcement elements 18, in this case connecting reinforcing bars made of reinforced concrete. These have been introduced in the context of the production of the individual component 10 such that they extend partially within the component 10, partially outside thereof. The outer sections are each designated 18a, the inner sections 18b each.

Each connection reinforcement element 18 of the individual component 10 is assigned a respective elongate hole directed into the component interior on the component upper side 12 whose longitudinal center axis is aligned with the longitudinal center axis of the outer section 18a of the associated connection reinforcement element 18 ,

This ensures that the reinforcing elements 18, namely the outer portions 18a thereof, respectively in corresponding holes 14 'of another, preferably identical (also prefabricated) individual component 10' can intervene or can be inserted suitably, see. for example Fig. 2 ,

In the present case, the reinforcing rod 18 or its inner section 18b is guided in each case in the interior of the individual component 10 essentially up to its upper side 12. In this case, it runs from the bottom upwards slightly obliquely to the central axis of the single component 10 or between the portion 18a of the connecting reinforcement element 18 and the hole 14 resulting alignment line, so that he does not in each case in the upper component area with the respective, the corresponding reinforcing rod portion 18a associated hole 14 is aligned, but immediately adjacent to the hole 14 extends substantially to the top 12.

This in Fig. 2 upper individual component 10 can be connected to the further, lower individual component 10 'by the individual component 10 from above to the already installed at the location of the concrete wall to be built, lower individual component 10' approximated or lowered on this or in the same direction. In this case, the connecting reinforcement bars 18 of the individual component 10 are inserted or threaded into the corresponding holes 14 'of the individual component 10' until they come to lie or are arranged in the holes 14 '. The lowering is therefore carried out as part of the assembly at the site of the later concrete wall, for example by means of a crane.

Previously, in the holes 14 'of the lower individual component 10' have already been filled with potting compound 20, namely in the present case with cement-bonded grout. Due to the weight of the individual component 10 to be lowered or by the connection reinforcements 18, the grouting mortar 20 in the respective hole 14 'is partially displaced outwards / upwards. After hardening of the grouting mortar 20, a stable bond is then created between the respective connecting reinforcement elements 18 and the holes 14 'or the corresponding hole walls.

The approximation of the individual component 10 to the individual component 10 'takes place here only up to a certain distance of the individual components 10, 10'. In such a way that the connection reinforcement elements 18 are indeed already in the holes 14 ', but that at the same time a narrow gap 21 between the two individual components 10, 10' remains. This joint 21 is later filled with bonding compound, in this case also with cement-bonded grout. The joint 21 serves for the additional connection of the two individual components 10, 10 '. In the present case, it has a thickness or thickness of approximately 20 mm. But the gap can also be made significantly stronger.

It can be seen in FIG. 2 Otherwise, one or the respectively in the interior of the single component 10 'extending reinforcing bar 18b' of the single component 10 ', which in an upper region almost parallel to the located in the hole 14' connecting arm bar 18 and the connecting reinforcement rod portion 18a of the single component 10 extends.

The reinforcing bar 18 'or the reinforcing bar section 18b' of the individual component 10 'and the connecting reinforcing bar 18 or the connecting bar section 18a of the individual component 10 thus form a so-called lap joint, i. they are over a certain (Überstoßungsstoß-) length 28 ', namely in the Überstoßungsstoßbereich, juxtaposed or overlap there.

In the present case, although the reinforcing bar 18b 'is the inner portion of the connecting reinforcing bar 18' of the individual component 10 ', namely in the present case around the upper portion thereof.

Naturally, however, it may alternatively also be provided to form the reinforcing rod 18b 'as a separate reinforcing element, which therefore does not simultaneously form part of the connecting reinforcement 18' or forms it.

The individual component 10 ', insofar as it is the lowest component of the concrete wall to be erected, may, moreover, be prefabricated in principle as a finished part, but alternatively also as a corresponding in-situ concrete component, before the individual component 10 is mounted.

In any case, depending on the desired height, many identical or quasi-identical individual components 10, 10 'in the later-erected concrete wall are "plugged on one another" as described.

In a special way, the holes 14 and 14 'are introduced into the respective individual components 10 and 10'. In the Figures 3-5 this is shown with reference to the individual component 10.

As in the Fig. 3 a), 4a ) can be seen, a formwork 22 has been installed before the concreting of the single component 10 at the positions of the later holes 14.

The formwork 22 is designed in several parts and has a formwork skin 24, which ultimately defines the contour of the later hole 14. The formwork skin 24 is formed of thin, flexible, elastic material, in particular plastic material.

The formwork skin 24 encloses a cavity 25, in which a separate, movable filler body 26 is inserted. The filler 26 is formed dimensionally stable. The outside of the filling body 26 is formed such that it at least partially rests against the inside of the formwork skin 24 and this stabilized as soon as the viscous concrete pushes against the outside of the formwork skin 24 within the context of the concrete component of the individual component 10.

After hardening of the concrete, the filler 26 is pulled from above from the hole 14, so that the formwork skin 24 solves almost independently due to their elasticity or spring force with decreasing back pressure by the packing 26 of the concrete wall of the respective hole 14, cf. ( Fig. 3b), 4b )). Then it can easily be pulled out so that the finished hole 14 remains ( Fig. 3c), 4c )).

Preferably, the formwork skin 24 is even biased in the fixed by the filler body 26 position. The bias is chosen such that the spring force of the elastic Formwork skin is sufficient to overcome the adhesion forces of the concrete or the hole wall. As a result, the formwork skin 24 can be removed from the hole 14 with even less effort.

Alternatively to the in the FIGS. 3a) - b) or 4 a) - b) shown formwork 22 with the contour of the formwork skin 24 shown there, for example, in the FIGS. 5 a) - b) shown formwork 22 'are used there with formwork skin contour 24'.

Various Schalhautkonturen are conceivable that could be stabilized by a corresponding smooth filler 26.

LIST OF REFERENCE NUMBERS

10, 10 '

Single component

12, 12 '

Component top

14, 14 '

hole

16

Component base

18, 18 '

Connection reinforcement element

18a

section

18b, 18b '

section

20

grout

21

Gap

22, 22 '

formwork

24, 24 '

scarf skin

25

cavity

26

packing

28 '

Lap joint length

Claims (14)

Method of constructing a reinforced concrete component of a building, preferably an upright concrete wall, comprising a plurality of individual components (10, 10 ') of respectively reinforced concrete, in particular precast concrete elements, with the following measures: (a) at least one first reinforced individual component (10, 10 ') is produced with, in part, inside the individual component (10, 10'), in particular outside the individual component (10, 10 ') extending, in particular elongated connecting reinforcement elements (18, 18 '), (b) at least one second reinforced individual component (10, 10 ') is produced, wherein during the manufacturing process in the second individual component (10, 10') to the particular elongated connection reinforcement elements (18, 18 ') of the first individual component (10, 10' ) adapted holes (14, 14 ') are introduced, (c) at the erection site of the concrete component or the structure, the individual components (10, 10 ') are mounted in such a way that the in particular elongated connection reinforcement elements (18, 18') of the first individual component (10, 10 ') are inserted into the holes (14, 14 ') of the second individual component (10, 10') intervene, (d) the holes (14, 14 ') of the second individual component (10, 10') are provided with a connecting reinforcement element (18, 18 ') for a bond between the respective hole wall and the respective connection reinforcement element (18, 18') arranged in the hole (14, 14 '). caring, preferably cement-bonded grout (20) filled. A method according to claim 1, characterized in that in the production of the second single component (10, 10 ') in this at least partially inside, in particular elongated reinforcing elements (18, 18') are introduced, which are positioned so that they are in the mounted state the two individual components (10, 10 ') with the in the filled holes (14, 14') arranged connection reinforcement elements (18, 18 ') of the first single component (10, 10') form a lash joint. Method according to claim 1 or 2, characterized in that the two individual components (10, 10 ') are mounted to form a joint (21) between the two individual components (10, 10'), in particular a joint (21) with a thickness of less than 30 mm, preferably less than 20 mm, which is then filled with an individual component (10, 10 ') additionally connecting compound compound, preferably grout or in-situ concrete. Method according to one or more of the further claims, characterized in that the two individual components (10, 10 ') are wall components of a concrete wall to be erected, wherein the connection reinforcement elements (18) from the underside (16) of the first individual component (10 protrude) and the holes (14 ') of the second individual component (10') corresponding to the opposite in the assembled state upper side (12 ') of the second single component (10') are arranged, wherein the first single component (10) at the erection of the concrete component of on top of the second individual component (10 ') is lowered, possibly forming a compound to be filled with compound joint (21), so that the connecting reinforcement elements (18) of the first single component (10) then into the holes (14') of the second individual component ( 10 ') intervene. Method according to one or more of the further claims, characterized in that in the manufacture of the first single component (10, 10 ') additionally holes (14, 14') in this single component (10, 10 ') are introduced - in particular on the component side (12, 12 ') which is opposite to the side (16) from which protrude the reinforcing elements (18, 18') - in which in each case the corresponding connection reinforcement elements (18, 18 ') of the second individual component (10, 10') can engage , Method according to one or more of the further claims, characterized in that during the construction of the concrete component at the erection site several of a group of preferably identical individual components (10, 10 ') each with the individual component (10, 10') protruding connecting reinforcement elements (18, 18 ') and with each holes (14, 14 ') for receiving each outstanding connection reinforcement elements (18, 18') of another single component (10, 10 ') of the group of individual components are mounted, in particular to form an upright wall. Method according to one or more of the further claims, characterized in that the holes (14, 14 ') in the second individual component (10, 10') are each produced by means of a multi-part formwork (22, 22 '), each having a flexible , preferably elastic skin (24, 24 '), which encloses an inner, stabilizing filler (26), which stabilizes the formwork (24, 24') during the concreting operation against the pressure exerted by the concrete, wherein in the subsequent Ausschalvorgangs First, the Füllköper (26) from the respective hole (14, 14 ') and then the dissolved or dissolving formwork skin (24, 24') from the hole (14, 14 ') is pulled out. A method according to claim 7, characterized in that the formwork skin (24, 24 ') is prestressed in the state stabilized by the filling body (26), wherein the prestressing of the formwork skin (24, 24') after pulling out the filling body (26) the hole is omitted. Reinforced concrete component of a building, preferably an upright concrete wall, with a plurality of individual components (10, 10 ') of reinforced concrete, in particular precast concrete parts, wherein at least a first individual component (10, 10') partly within the single component, partly outside the individual component ( 10, 10 '), in particular elongated connecting reinforcement elements (18, 18'), and at least one second individual component (10, 10 ') adapted to the in particular elongated connecting reinforcement elements (18, 18'), already during the production of the second individual component ( 10, 10 ') in this introduced holes (14, 14'), wherein the two individual components (10, 10 ') are interconnected by the particular elongated connection reinforcement elements (18, 18') of the first single component (10, 10 ' ) in the holes (14, 14 ') of the second individual component (10, 10') engage and the holes (14, 14 ') are filled with preferably cementitious grout (20), the f ür the composite between the respective hole wall and the respective connection reinforcement element (18, 18 ') provides. Reinforced concrete component according to claim 9, characterized in that in the holes (14, 14 ') extending connecting reinforcement elements (18, 18') of the first single component (10, 10 ') with at least partially inside, in particular elongated reinforcing elements (18, 18 ') of the second individual component (10, 10') form a lap joint. Reinforced concrete component according to claim 10, characterized in that the connecting reinforcement elements (18, 18 ') of the first individual component (10, 10') on the one hand and the at least partially inner reinforcing elements (18, 18 ') of the second individual component (10, 10') On the other hand, at least in the region of the overlap joint, they are rod-like and / or parallel or at least approximately parallel to each other. Concrete component according to one or more of claims 9-11, characterized by one or more features of claims 1-8. Single component, in particular parallelepiped, made of reinforced concrete for a concrete component according to claim 9, in particular precast concrete element, wherein the single component (10, 10 ') has holes (14, 14') for receiving partially protruding connecting reinforcement elements (18, 18 ') of another, preferably identical individual component (10, 10 '). Single component according to claim 13, characterized in that the individual component (10, 10 ') connection reinforcement elements (18, 18') which protrude partially from one of the side surfaces (16) of the single component (10, 10 ') that the holes (14 , 14 ') of the opposite side surface (12, 12') of the individual component (10, 10 ') are assigned, and that in each case a connecting reinforcement element (18, 18') of the individual component (10, 10 ') in each case a hole (14, 14 ') is assigned such that its from the one side surface (16) outstanding portion (18 a) of the connecting reinforcement element (18, 18') with a hole associated therewith (14, 14 ') in alignment.

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