EP2175079B1 - Method for forming a rigid corner reinforcement for reinforced concrete construction, reinforcement element and rigid corner reinforcement - Google Patents

Description

The invention relates to a method for forming a rigid corner reinforcement for reinforced concrete construction.

In composite construction in reinforced concrete construction, different stresses are assigned to the individual building materials according to their properties. In general, the concrete should absorb the compressive forces and the steel the tensile forces. When building substantially flat elements, such as floor, wall, curtain wall or ceiling structures are typically introduced as reinforcing elements grid elements in the concrete, which are formed as large-area mats of longitudinal and transverse struts of different numbers. The number of longitudinal and transverse struts in these mats is usually about the same size.

In order to connect to a substantially planar element another, running at an angle construction section (for example, a wall to a floor) rigid, care must be taken for a corresponding tensile strength connection of the corresponding reinforcement and a rigid design of the corner reinforcement. In today's reinforced concrete construction in particular the following procedures are used for the application: First, it is known to separate sections of conventional, as described above reinforcing mats sections and to bend these L-shaped or U-shaped. The way bent sections are then inserted into each other and thus equally toothed and connected together to form reinforcement cages, eg with binding wire or welded. Subsequently, these reinforcing baskets are connected by appropriate alignment to the reinforcements of the respective adjoining surfaces. However, in order to be able to insert the bent sections into one another, sections of the longitudinal or transverse struts must first be severed and removed manually at various points. This work is time consuming and therefore costly.

A certain reduction of the effort for trimming the cross struts is given in another possible form of connection. In this case, mat sections obtained from conventional reinforcing mats are bent in a U-shape only in one of the two surface elements to be connected at an angle, the connection to the further element is created by means of individual U-shaped bent iron bars which are threaded into the previously bent mat section and aligned with the rod ends in the direction of the course of the surface element to be connected and then verkrödelt with Rödeldraht. Again, the preparation of the mat section by removing individual cross struts or cross strut sections requires a significant amount of time. Equally time-consuming is the preparation and threading of the iron bars. In particular, when the connection to be created by a base plate in the direction of provided in a grid with transverse webs, otherwise hollow cell basement walls, is usually to choose this laborious and time-consuming method of connection.

A principle also possible, because of the even more time and effort but more rarely chosen method is to use as reinforcement in each of the angle to be interconnected surface elements of individual iron rods by bending shaped U-shaped elements that are inserted into one another and so toothed become. This is done on the whole in time-consuming manual work, and also here a time-consuming Verrödeln iron bars is required.

From the AT 405 663 B It is known to form from a special mat a U-shaped bent reinforcing element, which can then be used as an upright wall connection in a strip foundation. In this reinforcing element, the cross struts are bent between two adjacent longitudinal struts, so that longitudinal struts are still above the bending edges transverse to the upright ends of the transverse struts. These above the bottom of the "U" extending longitudinal struts are needed to hang it on iron bars, the reinforcing element in the concrete-casting shuttering for the strip foundation. Although this reinforcement is resistant to tension, it is not rigid.

From the CH 697 250 B1 It is known, for a corner joint, in particular between adjacent walls to weld reinforcing baskets of individual L-shaped bent reinforcing elements. These are expensive to produce and unwieldy.

In the EP 1 760 217 B1 Finally, a construction for a rigid sole or foundation connection is disclosed, which includes in a special way threaded on an open end of a U-shaped reinforcing element joint tape. The U-shaped reinforcing elements are provided with longitudinal struts, which lie between the bending line and the free ends of the transverse struts.

In the EP 0 495 135 A1 are shown reinforcing elements, which are formed from longitudinal and transverse struts, and it is also shown how such a reinforcing element can be used by bending over the longitudinal struts protruding ends of the transverse struts for a wall connection. For this purpose, such a reinforcing element is threaded into a reinforcement mat of a sole and out with upturned, bent ends of the cross braces upright in the wall reinforcement.

These disclosures also show no suitable for a fast, reliable and simple training of a rigid corner reinforcement solution.

The invention thus addresses the problem of being able to easily produce a rigid corner joint on a construction site in order to save time and effort.

This problem is addressed by the invention. Namely, the present invention is intended to provide a simplified method for forming a flexurally rigid corner joint with which connecting or transitional areas can be reliably and with less effort combined with connecting elements connected at an angle and can be connected with high tensile strength.

This object is achieved by a method having the features of claim 1. Advantageous further developments for this purpose are given in the dependent method claims 2 to 6.

As essential features, the method according to the invention presupposes that at least two essentially identically shaped, U-shaped reinforcing elements are pushed into each other so as to form the corner reinforcement extending at an angle, preferably at right angles. For this purpose, it is important that the reinforcing elements are formed from mats, which have a lot more arranged in a uniform pitch transverse struts as longitudinal struts, wherein the free ends of the transverse struts are bent at an extending beyond the outermost longitudinal struts bending line, preferably at right angles.

Because of this configuration of the reinforcing elements, it is even possible to thread such as an upright, with the free ends of the transverse struts upwardly facing reinforcing element another such reinforcing element and to lead so that it with the free ends of its cross braces through the interstices protrudes between the free ends of the transverse struts of the first reinforcing element and the closed, the bottom of the "U" forming ends of both reinforcing elements at the end of this process adjacent to each other or lie close to each other in the "corner" of the corner reinforcement to be formed. If longitudinal struts were still on the bent ends of the cross struts, these would be the free passage prevent the over-pushed crossbars of the second reinforcing element and prevent in accordance with the invention in the simplest way to achieve success of the formation of a reliable rigid corner reinforcement.

The construction thus designed is then cast or otherwise surrounded with concrete to form the sole and wall, two walls or the like flat elements.

In order to simplify the handling of the individual reinforcement elements, these are limited in their length (the dimension running along the "channel" of the "U"), in particular have a unit length. To form a corner reinforcement over longer distances than the length of a reinforcing elements a plurality of reinforcing elements are initially lined up in a first orientation end to end and preferably pushed together with existing on the reinforcing elements frontal projections of the longitudinal struts until the respective outermost transverse struts touch each other. In this position, the reinforcing elements are preferably connected together, e.g. by knurling the outermost cross struts with Roman wire. Then, over the series of interconnected first reinforcing elements, second reinforcing elements of the same type are pushed over in the manner described above and then pushed into one another in the same manner on the front side and also preferably connected to one another.

The second reinforcing elements can basically be threaded into the first two ways and passed over them.

Thus, it is possible on the one hand to position the bottom of the "U" of the second reinforcing element outside the space left between the bent ends of the transverse struts of the first reinforcing element, ie both bent ends of a transverse strut of the first reinforcing element on one side of the well of the "U" to arrange.

On the other hand, the second reinforcing element can also be inserted with the bottom of its "U" in the space between the opposite ends of the transverse struts of the first reinforcing element, so that on each side of the bottom of the "U" a bent end of each transverse strut of the first reinforcing element lies, one on the free ends of the bent transverse struts of the second reinforcing element facing away from the rear, on the free ends of the transverse struts of the second reinforcing element facing the front. This solution has especially in the reinforcement of a foundation connection the advantage that in the space between the bent ends of the transverse struts of the first, there upright reinforcing element and the bottom of lying threaded second reinforcing element, which projects into the sole, on the outside of comfortable above a joint tape can be introduced. This can then be e.g. at regular intervals, in particular with tie wire, are attached to the outer upright legs or bent ends of the transverse struts of the first reinforcing element.

In principle, the method described above can be applied both for a rigid reinforcement of a corner joint from wall to wall and also from sole (in particular foundation or ceiling) to the wall. However, in particular for a connection sole - wall, it is of particular advantage.

A reinforcing element for reinforced concrete construction which can be used for the method according to the invention is formed from a grid element which has longitudinal and transverse struts which are connected to one another at junctions. The free ends of the cross struts are bent along a bending line to a U-shape with free legs and a U-bottom. It is on the one hand essential that the grid element has more transverse than longitudinal struts and further that the cross struts with free ends to a significant excess beyond the outermost, the respective free end nearest longitudinal strut. On the other hand, it is crucial for the success of the invention that the free ends of the transverse struts are bent beyond the outermost longitudinal struts, so that the longitudinal struts all in the bottom of the "U" lie. The cross struts have a predetermined grid spacing from each other.

By such a configuration, two reinforcing elements thus formed can be inserted into each other in the manner described above and thus interlocked, without needing to be separated manually or sections out about sections of the transverse or longitudinal struts. In other words, it can be easily formed by merely bending over the ends, for example by means of a bending device, a fully functional reinforcing element, which is no longer nachzubehandeln and can be assembled without further aids and at high speed to a corner reinforcement. This results in comparison to the known reinforcement techniques a considerable time savings, which can be several man hours in building a corresponding wall connection. The fact that such a saving is accompanied by a considerable cost saving should be obvious.

Due to the fact that the grid element according to the invention has substantially more cross struts than longitudinal struts, it can be bent in U-shape with a comparatively narrow longitudinal strut reinforced section at the bottom of the "U" placed, for example, in the region of the transition to a wall can. The protruding free ends of the cross struts are exposed and can be nested or interlocked with each other to ensure a tensile connection of the reinforcement in the region of the transition. As an abutment for the tensile connection thereby ensure the longitudinal struts, which engage the transversely extending transverse struts of the other of the interlocking elements and thereby provide overcoming tensile forces hold.

The number of longitudinal struts in a reinforcing element used for the method according to the invention is preferably two to six, in particular two to four, in particular two longitudinal struts.

The number of transverse struts, which is chosen to be significantly larger than that of the longitudinal struts, is advantageously between ten and thirty, in particular between twelve and twenty, with particular advantage at sixteen cross struts.

A particular freedom in forming a reinforcing element from the grid element described results when the free ends of the crossbars by an excess beyond the outermost, the respective free end nearest longitudinal strut, which is greater than the measured in the direction of the crossbars width of the longitudinal struts provided Section of the grid element. The section of the grid element provided with longitudinal struts, which forms the bottom of the "U" in the finished reinforcing element, has, according to experience, turned out to be less wide than the length of the reinforcement, which in the areas to be connected to one another are to be connected to one another or into these sections must be led. This requirement is met by the last-mentioned advantageous embodiment. The excess may in particular be between 50 cm and 100 cm, more preferably between 65 cm and 75 cm, in particular at 70 cm.

For a symmetrical and flexible design of the grid element preferably to be used for the method according to the invention, it is advantageous if the transverse struts and the longitudinal struts are perpendicular to one another.

In particular, in the Anschlussverbau Kellerwandsteinen or similar provided with provided at a certain distance solid webs provided elements proves to be an advantage when the grid dimension of the distance of the transverse struts is selected accordingly. A particularly good buildability or a good ability to connect a formed from a grid element as described above reinforcing element of basement wall stones results when this grid is 12.5 cm. This distance is adjusted to the grid of the dimension of the basement wall stones, where the distance between two fixed connecting bridges often measures 25 cm. However, you can also choose other grid spacing for other distance measurements in the corresponding stones as long as the requirements for maximum permissible distances for individual bracing irons are not exceeded.

Furthermore, it is advantageous if, in the reinforcing element used for carrying out the method, the longitudinal struts also have a predetermined grid spacing from one another. This can be advantageously between 3 cm and 10 cm, in particular at 6 cm. A grid spacing of 6 cm allows the design of a correspondingly narrow base of reinforcing elements produced from the grid element by bending.

A grid element used for the formation of a reinforcing element which is particularly suitable for carrying out the method typically and advantageously has a substantially rectangular basic shape with the longer extent in the direction of the course of the longitudinal struts. An advantageous dimensioning of such a grid element consists in a length of between 1.5 m and 2.5 m and a width of between 1.25 m and 1.75 m. Such dimensioned grid elements are still easy to handle for forming reinforcing elements for use in the method according to the invention, but still allow the formation of sufficiently large reinforcing elements, which can be readily used in the areas to be connected and interconnected or interlocked.

In the case of the reinforcing element which is particularly suitable for the method, the longitudinal struts advantageously have a projection which projects beyond the outermost transverse struts and which is longer than half the distance between adjacent transverse struts. This supernatant is advantageously formed so that two frontally adjacent reinforcing elements can engage with the supernatants, without it being necessary to bend over the supernatants or otherwise deform.

Figur 1

eine Aufsicht auf ein erstes Ausführungsbeispiel eines für die Bildung eines in dem erfindungsgemäßen Verfahren einsetzbaren Bewehrungselementes verwendbaren Gitterelementes;

Figur 2

eine Aufsicht auf ein zweites Ausführungsbeispiel eines für die Bildung eines in dem erfindungsgemäßen Verfahren einsetzbaren Bewehrungselementes verwendbaren Gitterelementes;

Figur 3

in einer geschnittenen Seitendarstellung eine Ansicht einer nach dem erfindungsgemäßen Verfahren mit aus dem Gitterelement gemäß Figur 2 hergestellten Bewehrungselementen bewehrten Eckverbindung im Betonbau (hier zum Anschluss einer mit Kellersteinen gemauerten und mit Beton vergossenen Wand an ein Fundament);

Figur 4

in einer Seitenansicht ein für das Verfahren verwendbares Bewehrungselement;

Figur 5

in einer Aufsicht einen Kellerwandstein;

Figur 6

den Kellerwandstein aus Figur 5 in einer Schnittdarstellung genommen entlang der Schnittlinie A - A;

Figur 7

in Aufsicht eine mit aus Gitterelementen gemäß Figur 2 hergestellten Bewehrungselementen nach dem erfindungsgemäßen Verfahren bewehrte, aus Kellerwandsteinen gemäß Figuren 5 und 6 errichtete Wand;

Figur 8

eine Darstellung eines nicht erfindungsgemäßen Verfahrens zum Ausbilden einer biegesteifen Eckverbindung in drei Arbeitsschritten; und

Figur 9

eine Darstellung weiterer Einzelheiten zum Arbeitsschritt 3 aus Fig. 8.

The reinforcing element may in principle be formed from any suitable material; However, iron or steel struts are preferred here. These iron or steel struts advantageously have a circular cross section with a diameter between 5 mm and 10 mm, in particular 7 mm. Further advantages and features of the invention will become apparent from the following description of embodiments with reference to the accompanying figures. Showing:

FIG. 1

a plan view of a first embodiment of a usable for the formation of a usable in the inventive reinforcement element grid element;

FIG. 2

a plan view of a second embodiment of a usable for the formation of a usable in the inventive reinforcement element grid element;

FIG. 3

in a sectional side view of a view of a method according to the invention with out of the grid element according to FIG. 2 prepared reinforcing elements reinforced corner joint in concrete (here to connect a bricked with basements and cast concrete wall to a foundation);

FIG. 4

in a side view, a rebar element that can be used for the method;

FIG. 5

in a supervision a cellar wall stone;

FIG. 6

the cellar wall stone out FIG. 5 in a sectional view taken along the section line A - A;

FIG. 7

in supervision one with out of grid elements according to FIG. 2 prepared reinforcing elements according to the method of the invention, from Kellerwandsteinen according FIGS. 5 and 6 built wall;

FIG. 8

an illustration of a non- inventive method for forming a rigid corner joint in three steps; and

FIG. 9

a representation of further details of step 3 from Fig. 8 ,

The illustrations in the figures are purely schematic and in particular not to scale. In particular, they are not fully-fledged construction drawings and are intended merely to illustrate and illustrate the embodiments.

In FIG. 1 is schematically shown in a plan view of an exemplary embodiment of a suitable for the inventive method preferably to be used reinforcing element grid element and designated 1 there. The grid element 1 is composed of longitudinal struts 2 and substantially perpendicular to these extending transverse struts 3, which are interconnected at nodes 4. Both the longitudinal struts 2 and the cross struts 3 in the present case consist of iron rods which are welded to the nodes 4. The iron bars of the grid element 1 in this embodiment have a substantially circular cross section with a diameter of 8 mm.

It can clearly be seen in the figure as the first feature essential to the invention that the grid element 1 and therefore also the reinforcing elements made therefrom have significantly fewer longitudinal struts 2 than transverse struts 3. In this embodiment, the grid element 1 is formed from a total of four longitudinal struts 2 and sixteen cross struts 3. Both the longitudinal struts 2 and the cross struts 3 each have a constant, grid-like distance from each other; the distance a between the cross braces 3 is 12.5 cm in this embodiment; the distance b between the longitudinal struts 2 measures 6 cm.

Another feature of the invention is disclosed in US Pat FIG. 1 Good to see: The cross struts 3 are on each of the outermost longitudinal strut 4 on both sides to a significant projection over, which has the length I, which is 70 cm in this embodiment.

Finally, a supernatant z can be seen, with which the longitudinal struts protrude beyond the outermost transverse struts, and in this embodiment is 10 cm.

The total length of the grating element 1 according to the invention, which is essentially rectangular, is approximately 2.05 m in this exemplary embodiment; the total width is about 1.58 m.

A similar grid element 1 'extending from the grid element 1 FIG. 1 is distinguished only by a smaller number of here only two longitudinal struts 2, otherwise the same structure with the same dimensions, is shown in Figure 2.

By bending the cross braces 3 to a U-shape is now from a like in the FIGS. 1 or 2 shown grid element 1 or 1 'formed a reinforcing element, which can be used in accordance with the invention for reinforcing corner areas or transition areas in concrete. The side view of such a reinforcing element 5, which has been formed from a grid element 1 ', is in FIG. 4 shown. Important for the design according to the invention is that the free ends of the transverse struts 3 outside of the outermost longitudinal struts either directly adjacent or (as in FIG. 4 shown) are bent in the vicinity thereof, so that all the longitudinal struts 2 are located in the bottom 6 of the "U" thus formed.

In FIG. 3 a situation is shown in which a rigid corner reinforcement is formed according to the invention. For this purpose, the upright reinforcing element 5 is placed as the first reinforcing element in the sole and then threaded the second reinforcing element 5 of the same type on the open ends of the transverse struts 3 of the first reinforcing element and placed horizontally in the sole. About the first reinforcing element 8 basement wall bricks 9 have been here then layered to form the wall.

In this example, the second reinforcing element 5 has been slipped over the first reinforcing element 5 such that the base 6 of its U-shape lies between the upwardly facing upwardly open free ends of the transverse struts of the first reinforcing element. This allows the simple attachment of a joint tape 12 shown here in the space between the back of the bottom 6 of the second reinforcing element 5 and the opposite free ends of the transverse struts of the first reinforcing element. Of course, instead of a wall with Kellerwandsteinen 9 here also connect a cast wall formed in cast-wall, this also on a floor slab instead of on a foundation. Then, however, a joint tape is not mandatory.

The reinforcing elements 5 are, as can be clearly seen here, moved into one another and toothed, so that they get a tension-stable and rigid connection. Furthermore, it is easy to see how the reinforcing elements 5 with the free ends of the transverse struts 3 each protrude away from the connection point in sufficient length in the adjacent, poured with concrete or pouring element and are anchored there accordingly.

When displayed in FIG. 3 the wall 8 has a comparatively small thickness, which is why the reinforcing element 5 is formed with only two longitudinal struts 2. For the construction of walls of greater wall thickness, a correspondingly broader in the base formed reinforcing elements with more than two longitudinal struts, eg four longitudinal struts can be formed (for example, a grid element according to Figure 1).

A basement brick is in again FIG. 5 in supervision and in FIG. 6 in a sectional view along the section line A - A from FIG. 5 shown and generally designated 9. The basement wall brick 9 is characterized by webs 10 arranged at a regular spacing, between which cavities 11 are left in each case. Typically, the distances between the webs 10 25 cm, the distance between a web 10 and the outer edge of the basement wall brick 9 amounts to 12.5 cm. From such cellar wall stone 9 becomes, as in the FIG. 7 shown, built a wall by these basement wall blocks 9 offset by one half length each placed on each other and the cavities 11 are finally filled with concrete. As in FIG. 7 to recognize, are suitable reinforcing elements 5, made, for example, from a as in FIG. 2 Grid element 1 shown, also in an excellent manner, to 9 formed without the need for further processing of such basement wall bricks To connect wall elements tensile strength, since the spaced in the grid 12, 5 cm spaced bent ends of the transverse struts project exactly into the cavities 11.

In the FIGS. 8 and 9 finally, a method not according to the invention is subdivided according to working steps. In this case, in a first step, a first reinforcing element in a first direction, for example, erected on a base for attachment to a sole upright on the base 6, or there are several such reinforcing elements frontally juxtaposed. In a second step, these are moved with the supernatants z into each other in a plurality of first reinforcing elements and then connected to the outermost transverse struts, in particular verkrödelt.

Finally, in a third step, a second reinforcement element is then threaded over the first reinforcement element and pushed so that the base of the first and the base of the second reinforcement element are close together and the free ends of the two reinforcement elements protrude into the respective elements to be reinforced and connected , In the in the FIGS. 8 and 9 As shown, this is done so that the bottom of the second reinforcing element is beyond both upwardly facing, free ends of the crossbars of the first reinforcing element.

According to the invention, the second reinforcing element is as in FIG. 3 shown inserted with the bottom between opposite free ends of the transverse struts of the first reinforcing element.

If more than one first reinforcing element has been set up in the first step and then these have been pushed together and joined together in step two, several second reinforcing elements are guided over the first reinforcing elements in step three. These are also pushed into one another with their supernatants z and connected to each other at the adjoining transverse struts 3 adjacent second reinforcing elements, in particular verwrödelt with wire. This shows again FIG. 9 clear.

Overall, it is once again clear from the above description of the embodiments, which essential advantage brings the invention. Because of the particular configuration of the reinforcement element 5, it is no longer necessary in particular to separate sections of conventional lattice mats by hand during the formation of reinforcements for transitions in corner regions or to inconveniently lash out individual U-shaped elements. Instead, with considerable savings of time and therefore costs, the reinforcement in these transitional areas can be carried out quickly and with simple means. The method according to the invention was described by way of example with reference to a binding wall sole. Equally, however, it is also possible to create a wall-wall connection, for which only the orientation of the first and second reinforcement elements must be changed or adapted accordingly.

LIST OF REFERENCE NUMBERS

1, 1 '

grid element

2

longitudinal strut

3

crossmember

4

junction

5

reinforcing element

6

reason

7

foundation

8th

wall

9

Keller Masonry

10

web

11

cavity

12

joint tape

a

distance

b

distance

l

length

z

Got over

Claims (6)

1. A method for forming a rigid corner reinforcement for reinforced concrete construction, composed of at least two substantially identically shaped U-shaped reinforcement elements (5), which are formed by substantially rectangular bending the ends projecting beyond the outermost longitudinal struts, of crossbars (3) arranged in a regular grid, of a grating element (1) having substantially more crossbars (3) than longitudinal struts (2), wherein in a first step a first of the U-shaped reinforcement elements (5) is placed with its closed end in the corner of a corner connection to be reinforced, that the open ends of the U in the direction of the other profile of a first wall or floor section (8, 7) to be connected to the corner joint, in a second step, the second U-shaped reinforcement element (5) is threaded with its longitudinal struts (2) about the longitudinal struts (2) of the first U-shaped reinforcement element (5),
   that lies with its closed end (6) in the region of the closed end (6) of the first reinforcement element (5) and runs with its open end in the direction of the profile of a second wall or floor section (8, 7) to be connected to the corner joint and wherein, in a third step, the so nested reinforcement elements (5) are cast in concrete or surrounded by other means.
2. A method according to claim 1, characterised in that in the first step a series of identically formed first U-shaped reinforcement elements (5), in which sections of the longitudinal struts (2) protrude beyond the outermost crossbars (3) are arranged in frontal rows against one another and are pushed into one another with the protruding sections of the longitudinal struts, so that the outermost crossbars of the adjoining neighbouring first U-shaped reinforcement elements contact one another and that subsequently the same number of second U-shaped reinforcement elements are threaded according to the second step into the row consisting of the first reinforcement elements and analogue to the first reinforcement elements are pushed frontally into one another.
3. The method of claim 2, characterised in that in every case the first U-shaped reinforcement elements (5), preferably as well the second reinforcement elements (5) are bound together by tying the adjoining outermost crossbars (3) of neighbouring U-shaped reinforcement elements.
4. The method according to any of the preceding claims, characterised in that the first reinforcement elements (5) are laid on a sole for fixing a wall (8) vertically with their closed end (6) and the second reinforcement elements are threaded horizontally over the first reinforcement elements.
5. The method according to claim 4, characterised in that the second reinforcement elements (5) are guided with their closed end (6) between the parallel-running and bent ends of the crossbars (3) of the first reinforcement elements and that a joint tape (12) is inserted in an intermediate space between the vertical bent ends of the crossbars, facing away from the open end of the second U-shaped reinforcement elements, and the closed end of the second U-shaped reinforcement elements.
6. The method of claim 5, characterised in that the joint tape (12) is bound in an upper section with adjoining vertical bent ends of the crossbars (3), in particular tied with wire.

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