EP1878846A1 - Connecting cage, its use and connecting reinforcement manufactured therewith - Google Patents

Abstract

The cage has longitudinal wires (10) made from concrete reinforcement steel and connecting a hairpin-shaped bracket with side pieces (16, 17), where the wires are arranged parallel. Transverse wires intersect orthogonal to the longitudinal wires, and a bottom rod stands right-angle to the bracket. A connecting plane parallel to a plane comprising the bottom rod limits a bottom section (8) of the cage, where the bottom section is arranged in an area of a bottom plate. A wall section (9) for arrangement in a wall area (2) is provided against middle sections of the bracket.

Description

The invention relates to a terminal basket for reinforcing the connection of a base plate and a reinforced concrete wall according to the preamble of claim 1, as well as the use of this terminal basket and a connection reinforcement created therewith.

Known connection baskets of the type mentioned consist of U-shaped brackets which are interconnected by a plurality of transverse wires. Such hoop baskets are arranged in the connection area with upturned strap ends on the base of a concrete slab to be created. To connect to the soil reinforcement similar hoop baskets are also arranged lying in the bottom plate, the arc of the standing and the baskets mesh. In the wall area, reinforcement mats are installed parallel to the bow ends projecting into them. Creating such a connection reinforcement is relatively time consuming.

It is an object of the invention to facilitate the creation of a connection reinforcement and to reduce the time required for it.

This object is achieved by a terminal basket having the features of claim 1 and its use for reinforcing the connection of a floor panel and a wall according to the features of claim 16.

Figur 1

in Seitenansicht einen Anschlusskorb und weitere im Bereich eines Boden-Wand Anschlusses vorgesehene Bewehrungselemente;

Figur 2

die Abwicklung des Anschlusskorb von Figur 1 in eine Ebene;

Figur 3

den Anschlusskorb von Figur 1 in perspektivischer Darstellung;

Figur 4

eine Darstellung gemäss Figur 1 mit einem am Anschlusskorb befestigten Fugendichtungsband;

Figur 5

den Querschnitt eines Anschlusskorbs gemäss Figur 1 mit zusätzlichen, gekürzten Längsdrähten;

Figur 6

einen Abschnitt der Abwicklung des Anschlusskorbs von Figur 5 in eine Ebene;

Figur 7

einen Abschnitt des Anschlusskorbs von Figur 5 in perspektivischer Darstellung; und

Fig. 8-10

den Figuren 5 - 7 entsprechende Darstellungen einer weiteren Ausführungsform des Anschlusskorbs, mit weniger stark gekürzten, zusätzlichen Längsdrähten.

The invention will be explained in more detail below with reference to the figures with reference to an embodiment.
Show it:

FIG. 1

in side view, a terminal basket and further provided in the region of a floor-wall connection reinforcing elements;

FIG. 2

the settlement of the terminal basket of Figure 1 in a plane;

FIG. 3

the terminal basket of Figure 1 in perspective view;

FIG. 4

a view according to Figure 1 with a attached to the terminal basket joint sealing strip;

FIG. 5

the cross section of a terminal basket according to Figure 1 with additional, shortened longitudinal wires;

FIG. 6

a portion of the settlement of the terminal basket of Figure 5 in a plane;

FIG. 7

a section of the terminal basket of Figure 5 in perspective view; and

Fig. 8-10

Figures 5 - 7 corresponding representations of another embodiment of the terminal basket, with less greatly reduced, additional longitudinal wires.

In Figure 1, the contours of a bottom plate 1 and an outer wall 2 adjoining the edge are indicated by dotted lines and in these, the reinforcing elements used are shown in their mutual positions, especially in the bottom plate 1 arranged reinforcing mats 3, 4 and arranged in the wall reinforcement mats 5, 6, and arranged in the transition area port basket.

The upper surface of the base plate 1 defines a connection plane 7. The connection basket consists of a below this connection level 7 and provided for arrangement in the region of the bottom plate bottom part 8 and above the connection level 7 lying and provided for arrangement in the wall portion wall part.

The terminal basket consists of several equal, bent in a plane longitudinal wires 10 (only one of which is visible here) and a plurality of cross wires 11 - 15 made of reinforcing steel. The longitudinal wires 10 are arranged parallel to each other and their bending planes are parallel to each other. The transverse wires 11-15 intersect the longitudinal wires 10 orthogonally and are welded or otherwise fixedly connected to the longitudinal wires at the points of intersection.

The longitudinal wires 10 each form a hairpin-shaped bracket, which consists of a first leg 16, a second leg 17 and a leg 16, 17, the curved bracket portion 18. At the first leg a substantially perpendicular to the bracket standing bottom bar 19 is bent. The bottom bar is directed from the first leg 16, starting on the same side as the curved bracket portion 18, so that a defined by the center line of the second leg 17 straight line 19 intersects the bottom bar. The first leg 16 thus lies on the outside and the second leg 17 on the inside of the angle formed by the bracket and the bottom bar 19 angle element. With regard to this example, the first leg is therefore also referred to below as the outer leg 16 and the second leg as the inner leg 17.

Both the bottom bars 19 and the ends remote from the curved bracket portion 18 of the outer and the inner legs 16, 17 belong to the bottom part 8 of the terminal basket, which is provided for arrangement in the bottom plate 1. By contrast, middle sections of the stirrups are provided for arrangement in the region of the wall and thus belong to the wall section 9 of the connection basket. Since the bottom bars 19 are bent to the outer legs 16 of the bracket, the terminal basket forms a strong reinforcement of the outer frame corner and a direct coupling of the reinforcement mesh 3, 5 of the lower ground reinforcement and the outer wall reinforcement.

For fixed anchoring of the inner stirrup leg 17 in the bottom plate 1, an end hook 20 is bent at its end remote from the bent bracket portion 18 end. At least a portion of this end hook is transverse to the inner leg 17 in the bottom part 1 of the terminal basket, so that the inner leg 17 is anchored by the end hook 20 in the bottom plate 1.

The end hook 20 is directed towards the outer leg 16 so that it extends under the bracket. Its free end 22 is between the legs 16, 17 of the bracket, so that workers can hardly injure themselves when laying the port basket. In order to ensure a strong anchoring of the inner leg 17 in the bottom plate 1, preferably a widest possible end hook 20 is formed. The width b of the end hook 20 measured in the longitudinal direction of the bottom bar is preferably at least equal to half of the maximum width B of the stirrup measured in the same direction. The end hook 20 consists of a circular hook bow 23 and a subsequent thereto, straight extension 24 which forms a U-shaped portion of the longitudinal wire 10 together with the hook bow 23 and an end portion of the inner leg 17. This hook shape ensures a very good anchoring of the inner stirrup leg 17 in the bottom plate.

The distance x between the end hook 20 and the bottom bar 19 makes it possible to introduce a steel allowance in the frame corner, if necessary.

The diameters of the longitudinal wires 10 and the transverse wires 11-15 are selected according to the standards for the reinforcement of frame corners and are usually between 7 mm and 12 mm. The length L of the bottom bars 19 is also given by standards. The required height H of the bracket is selected as a function of the thickness of the bottom plate and the thickness of the adjoining wall so that the bracket protrude for connection reinforcement sufficiently far in the wall area. Compared to the known, on the wall side open hanger baskets, the bracket of this terminal basket may have a lower height H, since its curved bracket portion 18 is part of the wall portion of the terminal basket. Both the length L of the bottom bars and the height H of the brackets is at least 500 mm for the reinforcement of conventional wall connections.

A first transverse wire 11 is arranged in the end section of the preferably circular curved bracket section 18 which adjoins the outer leg 16, and all further transverse wires 12 - 15 are arranged as a distribution reinforcement in the region of the bottom bar 19. With suitable positioning of the first cross wire 11 arranged on the bracket and of the transverse wire 12 of the distribution reinforcement lying next to it, this enables the compact stacking of several identical connection baskets of this kind. The transverse wire 12 of the distribution reinforcement following the first transverse wire 11 is preferably outside arranged by the width B of the bracket called bow section of the terminal basket. Altogether, there are at least two and preferably three or more transverse wires 12-15 arranged in the region of the bottom bars 19.

The two legs 16, 17 of the bracket run to the bracket portion 18 connecting them at an acute angle α of preferably between 2 and 5 degrees together. In the production of the longitudinal wires by bending longitudinal bars, this has the advantage that when a predetermined bending device width of the leg connecting bracket portion 18 by a suitable choice of this angle α, the maximum width B of the bracket to the value required for a frame corner with certain dimensions is adjustable. The width B of the bracket determines the distance of the reinforcing mats 5, 6 of the inner and outer wall reinforcement, since they are applied in the region of the connecting plane 7 to the outside of the inner and the outer leg.

The longitudinal direction of the bracket is determined by a middle distance lying at the same distance from its two legs, which corresponds to the angle bisector in mutually inclined legs. The bottom bar 19 is perpendicular to this middle straight and thus perpendicular to the bracket. Since the terminal basket is laid with parallel to the bottom plate bottom bars, the brackets are perpendicular to the bottom plate, their middle straight lies in a direction indicated by a dotted line center plane 21 of the wall portion 2. The outer and inner legs 16, 17 of the bracket are thus in the same mass this center plane 21 inclined. The inclination of the outer leg 16 has the advantage that the reinforcement mat 5 of the outer wall reinforcement is easily retractable between the outer formwork of the wall and this leg 16, not shown in the figure. On the other hand, due to this inclination, the first transverse wire 11 is slightly inside the outer one Wall reinforcement, so that it can hinder the insertion of the concrete with small widths B. As an alternative to this embodiment, the angle between the brackets and the adjoining thereto bottom bars 19 therefore also slightly deviate from the right angle, so that the outer leg of the bracket is less inclined than the inner, or that the outer leg 16 perpendicular to the bottom bar 19 stands.

For the production of the terminal basket, a welded wire mesh of mutually parallel longitudinal bars 10 'and these orthogonally crossing transverse bars 11-15 is first prepared (see FIG. 2) and then formed into the terminal basket. The connection basket is preferably designed so that it can be produced from the flat wire mesh exclusively by bending the longitudinal bars of the same. From the longitudinal bars 10 'thereby formed in accordance with the above description formed longitudinal wires 10th

First, the end hooks 20 and the bent wire sections 25 connecting the outer legs 16 to the floor bars 19 are formed, and finally the sections 18 of the bars connecting the legs 16, 17 are formed. Preferably, these sections of the longitudinal wires are bent in a circle and with the same bending radius, so that one and the same bending device can be used to bend the entire terminal basket.

A difficulty is the last bending step 18, the bending of the hairpin-shaped bracket, the small distance between the outer leg 16 and the extension 24 of the end hook 20. The wire springs slightly after bending back and he must therefore be over-arched to obtain the desired shape , Here are the straight extensions 24 of the final hooks with the corresponding outer legs 16 of the bracket in contact, which can hinder the overbending.

To avoid this, the projections 24 of the end hooks 20 are not parallel to the outer legs 16 of the bracket, but they approach starting from the end of the hook bow 23 to the inner leg 17 and thereby run at an angle β of preferably at least 5 degrees outer thigh 16 away. This ensures that the already shaped end hooks 20 do not create a flat surface on the outer stirrup legs 16 when the bent stirrup sections are bent over, but only touch them at one point, so that they can more easily slide past them. In addition, a bending device with conical cams is preferably used, around which the longitudinal bars 10 'of the wire mesh are bent. Each longitudinal bar 10 'is associated with such a cam 26 of the bending device, one of which is indicated in Figure 1 by a dashed line. During the bending process, the longitudinal wires 10 abut against these cams and they are slightly pressed by the conical shape to the thinner side of the cone, so that the already shaped end hooks 20 are guided past the outer leg 16 of the bracket of the respective longitudinal wire 10.

FIG. 2 shows the development of the connection basket of FIG. 1 into a plane. As is explained above, the terminal basket shown in FIG. 1 is bent from a planar wire grid of longitudinal bars 10 'and transverse bars 11-15, which are welded together at the crossing points.

The distance between adjacent longitudinal bars 10 'of the wire grid or longitudinal wires of the terminal basket is 300 mm and eleven longitudinal wires are provided so that the wire mesh and the terminal basket bent therefrom has a length of 3 m. This length has proved to be suitable for transporting the connection baskets and laying them by one and depending on the weight of the basket a maximum of two people. Of course, similar connection baskets can also be produced with other lengths. To increase the steel density of the distance between adjacent longitudinal wires can be reduced, which is required for a terminal basket with the same overall length correspondingly more longitudinal wires. The distance between the longitudinal wires is preferably 150-300 mm.

With the three dash-dotted lines, the center lines of the three bending zones are indicated, in which sections of the longitudinal bars of the hook bow 23 of the end hook, which forms the bottom bar to the outer bracket leg arc 25 and the arc portion 18 of the bracket are formed.

FIG. 3 shows a perspective view of the bent terminal basket of FIG. 1, with the longitudinal wires 10 each curved in one plane and the straight transverse wires 11-15 crossing them orthogonally.

FIG. 4 shows the arrangement according to FIG. 1, wherein in addition a joint sealing strip 27 mounted on the connection basket is visible in cross section. This joint sealing strip 27 is arranged such that it lies to a part in the bottom part 8 defined above for FIG. 1 and to another part in the adjoining wall part 9 of the connection basket. It is attached to the inside of the outer leg 16 of at least two longitudinal wires and extends between the legs 16, 17 of the bracket at least from the first to the last longitudinal wire of the terminal basket. Preferably, it extends a bit beyond the outermost longitudinal wires, so that the joint sealing bands of one after another in a row terminal baskets overlap each other in a transition region.

By lying on the outer legs 16 joint sealing strip 27, the stackability of the terminal baskets described above is not significantly affected. As an alternative to this, it would also be possible to fasten the joint sealing strip 27 to the end hook and in particular to the outer face of the straight extension 24 of the end extension facing the outer leg of this end hook.

A joint sealing strip 27 can be preassembled not only on the connection baskets described here but also on the longitudinal wires of differently shaped reinforcing elements for the connection reinforcement in an analogous manner. For example, the U-shaped brackets of a hanger basket of the type mentioned at the beginning of the prior art can be provided with a preassembled joint sealing strip.

Figure 5 shows the cross section of a terminal basket according to Figure 1, in each case between two longitudinal wires 10 a similar, shortened longitudinal wire 28 is provided, which is capped in the adjoining the outer leg portion of the strap just behind the first cross wire 11 and thus in Essentially consists of a bottom bar 19 'and an outer leg 16' of the bracket. The shortened longitudinal bar 28 can be seen in this view only by its capped end 29. The shortened longitudinal wires 28 reinforce the outer connection reinforcement and since they are cut in the outer end region of the leg portion connecting bracket portion 18 of the terminal basket in the region of these shortened longitudinal wires 28 remains open at the top, so that the introduction of the concrete and the Insertion of a vibrating needle for compression of the same is not hindered.

FIG. 6 shows, analogously to FIG. 2, a section of the unwinding of the connecting basket of FIG. 5, which has a plurality of longitudinal wires 10 and interposed therebetween, shortened longitudinal wires 28 in a plane. The processing of the complete terminal basket differs from the representation only in that it has a larger number of longitudinal wires 10, 28 and is correspondingly larger.

FIG. 7 shows a perspective view of the same section of the curved terminal basket of FIG. 5.

FIGS. 8-10 show corresponding representations of a further embodiment of the connection basket with additional, shortened longitudinal wires 30 in FIGS. 5-7. In this example, the shortened longitudinal wires are cut further back, at a point 31 lying in the region of the inner leg. In comparison to the variant shown in FIGS. 1-3 with all the same longitudinal wires, this modification reduces the iron cross section in the inner region of the frame corner.

For the description of the use of the terminal basket, reference is again made to FIG. Its purpose is the reinforcement of the connection of a bottom plate 1 and a wall 2. For this purpose, a series of one or more connecting baskets with the ground facing bottom bars 19 along the edge of the plate is placed so that the through the bottom bars 19 and the transverse wires 12 - 15 of the Verteilarmierung formed, flat portions of the terminal baskets are parallel to the bottom plate 1. If a soil reinforcement 3 is required, this is then laid so that the reinforcement mats 3 of the lower Bodenbewehrung come to rest on the aforementioned, flat sections of the connecting baskets. Then the upper soil reinforcement 4 is laid and cast the bottom plate. After curing of the bottom plate, the outer shuttering wall is created along the temples of the terminal baskets and then the reinforcing mats 5 of the outer wall reinforcement between this shuttering wall and the outer legs 16 of the bracket are retracted and employed on the outside of this leg 16. Subsequently, the reinforcing mats of the inner wall reinforcement are employed in accordance with the inner legs 17 of the bracket. The width B of the bracket is dimensioned so that the on both sides of the legs 16, 17 of the bracket employed reinforcing mats 5, 6 have the correct distance for the wall reinforcement. Finally, the inner shuttering wall is created and the wall is poured.

Claims (16)

Connecting basket for reinforcing the connection of a base plate (1) and an adjoining wall (2) made of reinforced concrete, with a plurality of equal, bent in a plane longitudinal wires (10) made of rebar, a hairpin-shaped bracket with a first leg (16), a second Leg (17) and a connecting these, bent bracket portion (18) and are arranged parallel to each other and with a plurality of the longitudinal wires (10) orthogonal crossing and at the crossing points fixedly connected thereto cross wires (11-15), characterized in that
to the first legs (16) each a substantially perpendicular to the bracket standing bottom bar (19) is bent and a to the bottom bars (19) containing plane parallel terminal level (7) a bottom part (8) of the terminal basket limited, in which the from the bent bracket portion (18) facing away from the second leg (17) and which is provided for placement in the region of the bottom plate (1), whereas an adjoining and central portions of the bracket-containing wall portion (9) of the terminal basket for placement in the wall area ( 2) is provided. A terminal basket according to claim 1, characterized in that the second legs (17) are connected to their anchoring in the bottom plate (1) with a transverse to this lying in the bottom part wire section (23). A terminal basket according to claim 2, characterized in that for anchoring the second leg (17) in the bottom plate, an end hook (20) is bent at its end facing away from the curved bracket portion (18). A terminal basket according to claim 3, characterized in that , measured in the longitudinal direction of the bottom bar (19), the width (b) of the end hook is at least equal to half the width (B) of the bracket. A terminal basket according to claim 2 or 3, characterized in that the end hook (20) is directed towards the first leg (16) so as to extend below the bracket. A terminal basket according to claim 5, characterized in that the end hook (20) has a hook bow (23) and an adjoining, straight extension (24), which approaches from the end of the hook bow (23) starting from the second leg (17) and thereby at an angle (β) of at least 5 degrees away from the first leg (16). A terminal basket according to any one of claims 3 to 6, characterized in that the curved bent wire sections (25, 18) connecting the first leg (16) to the bottom bar (19) and the second leg (17) and an arc adjoining the second leg (23) of the end hook (20) are circular and have the same radius so that they can be produced with the same bending device. A terminal basket according to any one of claims 1 to 7, characterized in that the legs converge towards the bracket section (18) connecting them at an acute angle (α) of preferably between 2 and 5 degrees. A terminal basket according to any one of claims 1 to 8, characterized in that the bottom bar (19) starting from the first leg (16) to the same side as the curved Stirrup portion (18) is directed so that a through the center line of the second leg (17) defined straight line intersects the bottom bar. A terminal basket according to claim 9, characterized in that in each case between two longitudinal wires (10) a similar, shortened longitudinal wire (28, 30) is provided, which is in the adjoining the first leg (16 ') game of the bracket. Connecting basket according to one of claims 1 to 10, characterized in that it can be produced by bending a flat wire grid consisting of longitudinal bars (10 ') and transverse bars (11-15). Connecting basket according to one of claims 1 to 11, characterized in that at least two and preferably at least three of the longitudinal wires (10) in the region of their bottom bars crossing transverse wires (12 - 15) are provided. A terminal basket according to claim 12, characterized in that the legs (16, 17) of the bracket with respect to the angle formed by this and the bottom bar (19) an outer leg (16) and an inner leg (17) and a first transverse bar (11) in an on the outer leg (16) adjoining end portion of the legs connecting, preferably circular bracket portion (18) is arranged and all other transverse rods (12 - 15) are arranged in the region of the bottom bar, so that a plurality of identical connecting baskets of this kind are compact stackable. A terminal basket according to any one of claims 1 to 13, characterized in that a joint sealing strip (27) on at least two longitudinal wires (10) is fixed so that it to a part in the bottom part (8) and to another part in an adjacent wall portion (9) of the terminal basket and extends at least from the first to the last longitudinal wire. Connecting reinforcement for connecting a base plate (1) to a wall (2), characterized by one or more connecting baskets according to one of claims 1 to 14, which are arranged with their bottom part (8) in the region of the bottom plate (1) and their brackets in the Protruding area of the wall (2). Use of one or more connecting baskets according to one of claims 1 to 14 for reinforcing the connection of a floor panel (1) and a wall (2), characterized in that the connecting baskets with their bottom part (8) in the region of a bottom plate (1 ) are arranged so that their brackets protrude into an adjacent wall area (2).

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