EP1021630B1 - Device for linking reinforced concrete elements - Google Patents

Abstract

The invention relates to a device enabling reinforced concrete elements (1, 2) to be linked by means of metal cables, certain portions of which are inserted into the just made concrete (1) while the cable portions which are not inserted protrude into the enclosure formed by the second contiguous concrete element (2). The first concrete element (1) presents a reinforcement which terminates in the area of contact with the second concrete element (2). In parallel or extension to said reinforcement of the first concrete element, pieces of metal cable (4) are inserted so as to provide either spaces for locating the cable free ends in the first concrete element, or passages in the enclosure formed by said first concrete element.

Description

The invention relates to a device consisting of armored Concrete parts and formwork for manufacturing the concrete parts, wire ropes are provided for connecting the concrete parts, which are partially embedded in the first manufactured concrete part are and their not recessed ends in the formwork of the protrude into the second concrete part.

The document FR-A-22 64 938 describes elastic reinforcements, which protrude above a vertically arranged concrete part in order to the processing tool when processing a retracted ceiling to dodge. After the tool over the elastic Armouring has gone away, it stands up again. The Reinforcement protrudes through the ceiling and into the formwork of the ' concrete part above it, which also functions as a wall, inside. The concrete parts are in place poured so that there is no need for special manipulations at the reinforcement ends.

In document CH-A-582 376 reinforcements are described the free ends of which are angled into recesses during manufacture of the precast concrete. When bending out to There is a risk of cracking when connecting with other concrete parts on the reinforcements.

Document DE-A-3702447 describes the connection of two concrete parts.

It is also known to connect concrete parts in that the joint into a concrete part of wire rope loops or the like are admitted, which then with appropriate Interconnect wire rope loops of a second concrete part.

If the second concrete part is built from in-situ concrete, it is also possible to concrete the wire rope loops in the second concrete part.

To facilitate manipulation with the wire rope loops, it is known to be box-like on the formwork edge of a concrete part Provide inserts to accommodate the wire rope loops. To the boxes can be opened and the initially folded wire rope loops then get into a Position for connection to the neighboring second concrete part.

Wire rope loops of the type mentioned above can both applied to in-situ concrete parts as well as prefabricated concrete parts become.

It is also known to reinforce concrete parts in the edge area to bend such that they are within the formwork are located. For example, a box-like insert be provided, which receives the bent reinforcing bars. After stripping and, if necessary, opening the boxes the reinforcing bars are bent out so that a Connection with neighboring concrete parts is possible.

Often it is necessary to use reinforcing bars in the concrete part which have a larger diameter. Then it grows the danger that the reinforcing bars will tear when bent back become. It also becomes difficult or impossible for the reinforcing bars as mentioned above, to bend in the edge area that the ends are initially within the formwork and are only bent up after stripping. At Reinforcements of larger diameter are therefore, for example openings are provided in the formwork through which the Project reinforcement bars. It is also known the ends to provide the reinforcing bars with pressed sleeves that have an internal thread, so that appropriately designed Reinforcing bars of the neighboring concrete part in these sleeves can be screwed in.

Overall, however, is the connection of reinforcing bars larger diameters that are difficult or impossible to bend, very labor intensive. This applies both when the Reinforcement in the formwork as well as when stripping and when Connect adjacent concrete parts.

The invention has for its object a device and to also propose a procedure with which it is possible especially concrete parts with larger diameter reinforcements to connect and taking the workload for the connection the concrete parts is much smaller than the previous ones Methods.

To achieve this object, the invention is based on one Device of the type specified and beats the in characterizing part of the first claim specified features in front.

The invention is based on the consideration that a wire rope is much more resilient to tension than a reinforcing bar usual steel quality. The cross section of the wire rope piece, that takes over the tensile forces from the reinforcing bar and forwarded accordingly, is therefore much less than that Cross section of the reinforcement bar. This in turn means that the wire rope piece remains sufficiently flexible so that it is not Trouble, the free end of the wire rope piece, for example in recording rooms in the formwork of the first Concrete part to accommodate.

The main advantages of the device according to the invention but are also obtained when for the wire rope pieces no receiving spaces in the formwork of the first concrete part are provided, but if the formwork breaks through has for the free ends of the wire rope pieces. The for the Wire rope pieces are necessary holes in the formwork much smaller than corresponding holes for the Reinforcing bars. Since the free ends remain movable, They hardly hinder working in the area of these formwork. The easy bendability is also important when transporting finished parts a major advantage.

The connection of the free ends of the wire rope pieces in the second Concrete part, with the reinforcing bars to be arranged there, can be in done in the same way as in the formwork of the first Concrete part. The wire rope pieces are then also, for example parallel to the reinforcing bars there. The power transmission then comes about in the second concrete part, that the concrete due to the surface bumps the wire rope pieces are firmly connected to them (composite effect), and anchoring similar to that obtained due to the rib structure on the surface of the usual Reinforcing bars. It is clear that the anchorage length of the Wire rope pieces is to be determined analogously in order to tear out to exclude. While it is possible to make additional connections between the wire rope pieces on the one hand and the ends of the Reinforcing bars on the other hand. This is necessary However not.

In general, it is sufficient if one reinforcement bar is used Wire rope piece is arranged parallel to the reinforcing bar. In special cases, or especially very large ones Diameters of the reinforcing bars can, however, be recommended several pieces of wire rope parallel to a single reinforcing bar to arrange. It is clear that this deformability which is then improved to thinner wire rope pieces.

In a further embodiment of the invention, receiving pockets are in the first concrete part for the free ends of the wire rope pieces intended. The free ones, for example, can be placed in these pockets Ends of the wire rope pieces are inserted. After this The free ends of these pockets are stripped pulled out to the required position to connect with to be brought to the reinforcing bars of the second concrete part.

According to a further proposal of the invention, the free Ends of the wire rope pieces are rolled up or wound up, which improves handling with the wire rope pieces becomes.

The recording rooms are, for example, by box-like Inserts formed in the formwork of the first concrete part. This box-like inserts are covered to prevent intrusion of the to exclude liquid concrete. When stripping the Covers removed and the free wire rope ends are then accessible.

The recording rooms can also be made using easily removable wrappers the free ends of the wire rope pieces may be formed. For example, the free ends of a polystyrene envelope be covered from which after the concrete has hardened and be easily pulled out or bent out of the formwork can. The remaining receiving openings are created of the second concrete part filled without any special measure.

As a rule, it is sufficient for the invention, as already above executed when the wire rope pieces are of sufficient length be laid parallel to the reinforcing bars. In particular Feller can be attached to the ends of the wire rope pieces Arrange anchoring elements in the first concrete part. Such Anchoring elements can, for example, be pressed on Sleeves or loops are formed. Such Measures are appropriate if, for special reasons Dimensions of the formwork or the concrete part of the arrangement not allow sufficient anchorage lengths.

In another variant of the invention, the used Wire rope pieces corrugated. Such a curl can be achieve, for example, that instead of one of the strands of the wire rope is a relatively easily deformable steel rod is used. This allows the wire rope piece to be corrugated, without the wire rope strands in improperly deformed.

According to the invention, as stated above, the wire rope piece parallel to the reinforcing bars in the first concrete part arranged. With sufficient installation length of the wire rope or also using additional anchoring means on the wire rope will result that the reinforcement bars each transmitted tensile force passed into the wire rope becomes. In a variant of the invention, it is now proposed that that the wire rope pieces are rigid at least at one end Reinforcing bar sections are firmly connected, the Reinforcing bar sections parallel to the reinforcing bars of the Stretch concrete parts. The firm connection between the Reinforcing bar sections and the wire rope pieces can for example done by clamping sleeves. This embodiment the invention gives the advantage that the connection of the Reinforcement bar made with the wire rope piece in the workshop can be, while on the construction site the rod sections to be used in the same way as conventional ones Reinforcing bars.

In the preferred embodiment of the invention, to design the device as a reinforcement cage for construction purposes, the armouring basket has a top chord, a Lower chord, and one between the upper chord and lower chord itself extending, cranked shear bar, as well as an insulation layer in the area of cranking and at least one Wire rope piece is provided that the tensile forces that occur records.

Reinforcement baskets are used, for example, for a balcony slab, usually made of reinforced concrete or a similar component with the Connecting structure. It is essentially about the occurring compressive and tensile forces from bending and the transverse forces to record. An insulation layer ensures that the heat transfer from the balcony slab or the like into that Building is optimally insulated to the otherwise resulting Avoid damage and heat loss. The reinforcing bars, that form the well-known basket are usually made of stainless steel Steel manufactured, especially in the area of Insulation layer with normal steel with rust is to be expected and stainless steel also has a lower thermal conductivity.

In this way, the invention achieves that when installed in finished parts no rigid steel parts protrude. The rope is with Transport of the concrete part can be bent away. The main advantage the use of wire rope pieces is that the Cross-sectional dimensions of a wire rope piece essential can be kept smaller than the corresponding cross-sectional dimensions of reinforcing bars. A piece of wire rope is much more resilient and can therefore be used with smaller ones Cross sections can be managed. Smaller cross sections in turn result in a significantly reduced heat conduction.

In an advantageous embodiment of the invention provided that the insulation layer as formwork, especially used as lost formwork. The Andes devices designed in particular as a reinforcement cage arranged insulation layer, for example made of polystyrene or other known insulation materials, will included in the production of the panel to be connected and serves as lost formwork, i.e. as Formwork that remains on the prefabricated concrete element.

Furthermore, it is provided that the wire rope piece made of stainless Steel. By such an inventive Design is achieved that the corrosion resistance of these fasteners is greatly increased. At the same time but through the use of stainless steel or stainless steel provided a means by which the Heat conduction is deteriorated compared to normal steel, with which an improved thermal insulation is achieved. The Smaller cross-sections can be used favorably for the same Resilience supports this effect.

In one embodiment of the invention, the Upper chord can be formed by a piece of wire rope, in particular with cantilevered balcony slabs or similar components the top chord transmits the tensile stresses. In other application examples the invention, however, the wire rope piece also form the lower flange. The shear bar can also be formed by a piece of wire rope.

The connection of the wire rope piece of the invention Device, in particular the reinforcement cage, with the reinforcement bars the subsequent reinforcements, for example done in that the wire rope piece parallel to the Reinforcing bars run. The embedding of the wire rope piece in concrete, special measures for anchoring and Connection to the neighboring reinforcing bars.

In special cases, however, it can also be provided that a An anchor element, for example, at the end of the wire rope piece carries a pressed sleeve. Also one at the end of the wire rope piece trained loop can serve for anchoring.

In a modified form of the invention, this is Wire rope piece through compression sleeves with the subsequent reinforcing bars connected.

Another variant of the invention is in the range of Insulation layer arranged a reinforcing bar that at least with one end by means of a compression sleeve with a piece of wire rope connected is.

The reinforcements of adjacent components can also partially Wire ropes exist, and the wire rope piece in the area of The insulation layer is then at least with one end connected to these wire ropes or pieces of wire rope, for example through compression sleeves.

In the drawing are some embodiments of the invention shown schematically.

Fig. 1

einen Schnitt durch zwei Betonteile mit der erfindungsgemäßen Vorrichtung,

Fig. 2

einen Schnitt durch das erste Betonteil vor der Verbindung mit dem zweiten Betonteil bei einer abgewandelten Ausführungsform der Erfindung,

Fig. 3

eine Darstellung einer Vatiante der Erfindung in verschiedenen Betriebszuständen,

Fig. 4

einen Schnitt durch ein weiteres Ausführungsbeispiel der Erfindung,

Fig. 5

eine Ansicht in Richtung zur Darstellung der Fig. 4,

Fig. 6, 7

Schnitt durch zwei weitere Ausführungsbeispiele der Erfindung,

Fig. 8, 9, 10, 11

Darstellungen von Einzelheiten der Erfindung,

Fig. 12

einen senkrechten Schnitt durch zwei aneinander anschließende Betonteike, mit einer als Armierungskorb ausgebildeten erfindungsgemäßen Vorrichtung

Fig. 13 und 14

abgewandelte Ausführungsbeispiele der Erfindung

Show it:

Fig. 1

2 shows a section through two concrete parts with the device according to the invention,

Fig. 2

2 shows a section through the first concrete part before being connected to the second concrete part in a modified embodiment of the invention,

Fig. 3

a representation of a variant of the invention in different operating states,

Fig. 4

3 shows a section through a further exemplary embodiment of the invention,

Fig. 5

4 shows a view in the direction to the representation of FIG. 4,

6, 7

Section through two further exemplary embodiments of the invention,

8, 9, 10, 11

Representations of details of the invention,

Fig. 12

a vertical section through two adjoining concrete parts, with an inventive device designed as a reinforcing cage

13 and 14

modified embodiments of the invention

1 is in the first concrete part 1 Reinforcing bar 3 shown, the end 13 approximately to extends to the edge 14 of the concrete part 1.

A piece of wire rope 4 becomes parallel to the reinforcing bar 3 laid, the length set in concrete is chosen so that after the placing of the concrete in the formwork, not shown, secure anchoring of the wire rope piece 4 is obtained, so that the tensile forces that the reinforcing bar 3 has to absorb be safely transferred into the wire rope piece 4.

The concreted inner end 12 of the wire rope piece 4 can carry additional anchoring means that in the drawing are not shown in detail.

1, it is assumed that that the wire rope piece at the edge 14 of the concrete part 1 by the Formwork protrudes. The free end 5 of this wire rope piece is then analogously into the formwork of the second concrete part 2 introduced and runs parallel to the reinforcing bar 10, so that a mirror image configuration is obtained.

The concrete part 1 can be in-situ concrete. But it is also possible to design the concrete part 1 as a precast concrete part.

2 is a Recording space 9 provided, for example, by a suitable box made of plastic, sheet metal or the like is formed. This box is covered by a cover 15 locked. The box with the cover 15 takes the free Ends 5 of the wire rope pieces 4. After removing the cover 15, the free ends 5 can be bent or stand essentially rectangular due to its own elasticity from the edge 14 of the first concrete part 1. The connection with the second concrete part takes place in the described in connection with FIG. 1 Wise.

In the embodiment according to FIG. 3 it is provided that the wire rope pieces 4 are each bent in the receiving space 6 and are inserted into a pocket 7. The formation of the recording rooms 6 and 7 can, for example, by means of suitable moldings respectively.

The bottom illustration in FIG. 3 shows that position of the wire rope piece 4, which it takes when stripping. In the middle representation of Fig. 3 is the wire rope piece partially pulled out of the pocket 7. At the top 3, the wire rope piece 4 is at right angles from edge 14.

In the embodiment according to FIGS. 4 and 5, this is free End of the wire rope piece 4 wound in the form of a spiral. The spiral shape can be secured, for example, by holding wires his. By shaped bodies, for example also by a polystyrene coating, which can take up the wrap of the free end 5 a receiving space 8 is formed in the concrete part 1. After this Stripping the concrete part 1, the wire rope piece 4 with its free end can be brought into a position that the Allows connection with the second concrete part.

6 are the first Concrete part 1 and the second concrete part 2 arranged at an angle to each other. The wire rope piece 4 initially runs parallel to Reinforcing bar 3 and is in the manufacture of the concrete part 1 with its free end in the box-shaped receiving space 9 housed.

In the concrete part 2, the free end 5 is then parallel to Reinforcing bar 10 arranged. Through the wire rope piece 4 in this way the tensile force between the reinforcing bars 3, 10 transfer.

In the exemplary embodiment according to FIG. 7, there are comparative short wire rope pieces 16 use, which by clamping sleeves 17th and 18 are each connected to reinforcing bar sections 19, 20. The length of the sections 20 and 19 is such that the Forces from the reinforcing bars 3 of the concrete part 1 into the sections 20 are transferred, and then analogously one Transfer of the tensile forces to the reinforcement of the here is not Concrete part 2 shown in more detail. During creation of the concrete part 1 are the wire rope pieces 16 with the sleeves 17 and sections 19, similar to the embodiment 2, housed in the receiving space 9 and can after stripping by removing the lid 15 without Problems are overturned, as shown in Fig. 7 in the above Representation is shown.

8 shows the free end 5 of a wire rope piece, which carries a pressed-on anchoring sleeve 21. In in the same way can also be concreted in the concrete part 1 other end of the wire rope piece be formed.

Fig. 9 shows a variant of a wire rope piece 4 without further configuration.

Fig. 10 shows a wire rope piece 16, which is similar to the Embodiment of FIG. 7, with a ferrule 17 with a reinforcing bar section 20 is connected. The free end 5 in the embodiment of FIG. 10, for example similar to the concrete part 2, as in the embodiment 1.

11 shows a piece of wire rope in the form of a loop 21 the loop shape gives better anchoring.

As already stated, the main advantage of the Invention in that the protruding from the first concrete part Reinforcement parts remain relatively easily deformable, namely even if the reinforcements installed in the concrete part have relatively large diameters. So that will in particular avoided that by using wrong bending radii Cracks in the reinforcement of the bent structural steel occur. It also avoids the fatigue strength be reduced in the area of the back bends.

It is also achieved that pre-bent at an angle as planned Reinforcing bars according to the correct bending plans (under Compliance with relevant regulations) through flexible Rope ends (Fig. 6) can be replaced. This makes it easier Short-term delivery with standard products and provision instead of short-term expensive special production.

In a further embodiment of the invention, it is advantageous if the free end of the wire rope piece either at the end or also has a holding device at some distance therefrom, with which is possible the flexible wire rope with the reinforcement to connect the second concrete part. This allows you to use the rope quickly hook into the reinforcement, and the disadvantages of springback of the wire rope are eliminated.

In the embodiment of Fig. 12 is a galvanized wire rope 103 by means of a press sleeve 112 with the reinforcing bar 110 connected. This reinforcing bar consists of rustproof Steel and has a ribbed outer surface. By a another compression sleeve 113, the rod 110 is with a reinforcing steel or reinforcement rod 109 connected to conventional training.

The wire rope piece 103 with the reinforcing bar 110 and the Reinforcing bar 109 form the top chord 101, which is usually is stressed on train. The lower chord 102 is one Reinforcing rod 114 is formed, the washers 115 at its ends contributes to the pressure forces between the two components 117 and 118 to be able to transfer. The rod 114 is also made of stainless steel.

Extends between the upper chord 101 and the lower chord 102 the angled shear bar 119, the can optionally also be formed by a wire rope. The Insulation layer between the components 117 and 118 is with Designated 111.

The reinforcing bar 110, the shear bar 119 and the bar 114 of the lower flange 102 can by not shown Means to be interconnected so that a ready to install Reinforcement basket is obtained. This basket also includes the Insulation layer 111.

In the exemplary embodiment according to FIG. 13, this is Wire rope piece 104 arranged such that it is the insulation layer 111 penetrates. The wire rope piece 104 is through the compression sleeves 108 each with the reinforcing rods 109 Components 116 and 117 connected.

In the embodiment of Fig. 14 is the wire rope piece 105 laid parallel to the reinforcing bars 106, so that the Power transmission of the top chord 101 via the concrete takes place surrounds the rods 106 and the wire rope piece 105. Compression sleeves 107 improve anchorage.

The claims now filed with the application and later are attempts to formulate without prejudice to achieve further protection.

The backward relationships mentioned in the dependent claims point to the further training of the subject of the main claim by the features of the respective subclaim there. However, these are not considered a waiver of achievement an independent, objective / protection for the characteristics to understand the related subclaims.

Features previously only disclosed in the description can in the course of the process as of essential to the invention Significance, for example to differentiate it from the prior art be claimed.

Claims (21)

1. Device comprising reinforced concrete parts (1,2) and shutterings for producing the concrete parts (1,2), where wire ropes are provided in order to connect the concrete parts (1,2) the wire ropes being partially imbedded in the concrete part (1) produced first and whose not imbedded ends project into the shuttering of the adjoining second concrete part (2), characterised in that the first concrete part (1) has a reinforcement consisting of bars (3), which ends in the adjoining region of the second concrete part (2), that parallel to the reinforcements bars and/or in the extension of the reinforcement bars in the first concrete part (1) wire rope parts (4,16) are arranged, which take over and transfer the tensile forces of the reinforcement bars when the concrete parts are loaded and for whose loose ends containing spaces (6 to 10) in the fist concrete part (1) or openings in the shuttering of the first concrete part (1) are provided.
2. Device according to claim 1, characterised in that the loose ends (5) of the wire rope parts (4) of the first concrete part (1), which project into the second concrete part (2), are also arranged parallel to the reinforcement bars (10) and/or in extension of the reinforcement bars (10) ofthe second concrete part (2).
3. Device according to one or both of the preceding claims, characterised in that several wire rope parts (4) are arranged parallel and in extension to the reinforcement bars (3,10).
4. Device according to one or more of the preceding claims, characterised by containing pockets (7) in the first concrete part (1) for the loose ends (5) of the wire rope parts (4).
5. Device according to one or more of the preceding claims, characterised in that the loose ends (5) of the wire rope parts (4) are rolled up or wound up.
6. Device according to one or more of the preceding claims, characterised in that the containing spaces (9) are formed by box-like inserts in the shuttering of the first concrete part (1).
7. Device according to one or more of the preceding claims, characterised in that the containing spaces (6 to 8) are formed by sheathings of the loose ends (5) of the wire rope parts (4), which can be easily removed.
8. Device according to one or more of the preceding claims, characterised in that the wire rope ends (4) are undulated.
9. Device according to one or more of the preceding claims, characterised in that the loose ends (5) of the wire rope parts are formed into loops (21).
10. Device according to one or more ofthe preceding claims, characterised in that the wire rope parts (16) are connected fast at least at one end with rigid reinforcement sections (19,20), which extend parallel to the reinforcement bars (3,10) of the concrete parts (1,2).
11. Device according to one or more of the preceding claims, characterised in that the loose ends (5) of the wire rope parts (4) have holding devices in order to connect these loose ends with the reinforcement of the second concrete part (2).
12. Device according to one or more of the preceding claims, characterised in that the device is formed as a reinforcing cage for building purposes and the reinforcing cage has an upper boom (101), a lower boom (102), a cranked shearing force bar (119), which extends between the upper boom (101) and the lower boom (102), as well as an insulating layer (111) in the region of the right angle bend, and at least one wire rope part (103,104,105) is provided, which takes up the occurring tensile forces.
13. Device according to one or more of the preceding claims, characterised in that the reinforcement is a reinforcement bar (3), e. g. in an upper boom (101) or a lower boom (102).
14. Device according to claim 12, characterised in that the insulating layer (111) serves as a shuttering, in particular as a dead shuttering.
15. Device according to one or more of the preceding claims, characterised in that the wire rope part (4,26,21,103,104,105) is made of stainless steel.
16. Device according to claim 12, characterised in that the upper boom (101) and/or the shearing force bar (119) and/or the lower boom (102) are formed by a wire rope part (103,104,105).
17. Device according to one or more of the preceding claims, characterised in that the wire rope part (5,104,105) carries at least at one end (5,12) an anchoring element, e. g. a pressed-on sleeve (107).
18. Device according to one or more of the preceding claims, characterised in that the wire rope part (104) is connected through pressed sleeves (108) with the adjoining reinforcement bars (109).
19. Device according to claim 12 or 14, characterised by a reinforcement bar (110) in the region of the insulating layer (111), which is connected at least with its one end via a pressed sleeve (112) with the wire rope part (103).
20. Device according to one or more of the preceding claims, characterised in that the wire rope part (104) is connected at least with its one end to a wire rope respectively a wire rope part, which forms the adjoining reinforcement.
21. Method for producing a connection of reinforced concrete parts using wire ropes, which are partially imbedded into the concrete part produced first and whose loose ends not imbedded project into the shuttering of the second concrete part which has to be attached, characterised in that the loose ends ofthe wire rope parts are bent out of the containing spaces of the concrete part produced first, and are put into the shuttering of the second concrete part parallel and/or in extension of the reinforcement of this second concrete part, which consists of bars, and that then the shuttering is filled with concrete.

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