EP0959188B1 - Cantilevered slab and/or joint element for reinforced concrete structures - Google Patents

Abstract

For accommodation of the tractive and/or pressure reinforcement components in the structural body crossways to a vertical longitudinal plane run through passage apertures, in which a tubular body can be inserted, which on its outer surface has several peripherally running ribs via which the tubular body is supportable on the inner wall of the through passage aperture in the structural body. The tubular body (3), at least sectionally, in relation its length widens conically to at least one end and the output limits of the ribs (17), at least in the inserted area of the structural body, form a common enveloping cylinder or prism or cone.

Description

The invention relates to a cantilever and / or joint element for reinforced building structures, with one for receiving tension and / or compression reinforcement elements and, if necessary Shear force rods designed, one-part or multi-part structure, with the tensile - and / or pressure reinforcement elements in the structure approximately transversely to a vertical Through openings extending therealongplane are provided, and with a tubular body, this in the through opening is used or can be used, which on its outer surface several, at least has approximately circumferential ribs over which the tubular body and / or can be positively supported on the inner wall of the through opening in the building.

Cantilever panels in particular, but also others protruding outdoors in the area of a building enclosure Buildings form significant thermal bridges between the inside and outside temperature. in the The area of such thermal bridges has become more and more popular in recent years, Use insulation elements to separate the protruding structures from the internal structures to sort of thermally separate. With this, the considerations regarding the heat or the sound transition can be solved, but such ceiling constructions require the Creation of a static unit between a ceiling construction and a cantilever Plate. As a rule, there are pegs for the upper and the opposite ends the lower reinforcement is concreted into the ceiling slab, which protrude sufficiently to enter the cantilever plate, e.g. to intervene in a balcony slab.

A component for thermal insulation in buildings has already become known (EP-A1-0 568 813), in which reinforcing bars that run transversely to the insulating body through this extend through and protrude on both sides, inserted into a tube that faces inwards projecting projections to thereby achieve that the reinforcing bar approximately in the middle remains of the pipe and, for reasons of corrosion, of the concrete or of the concrete milk entirely is enclosed. For this purpose, the tube in the tube wall has a variety of Openings to allow the entry of concrete or milk into the gap. For fixing this tubular body in the insulating body, relatively high axially extending elevations are provided, which should dig into a prepared through hole when pushed in. If the Ribs or elevations, however, assume a corresponding extent, there are hardly any detachable Problems, because especially when the building structure is made of foam no excessive forces can be absorbed without limiting the through hole breaks out at least in the rear area.

There is also already a joint and / or dilation and / or cantilever element usable component known (EP-B1-0 442 130), in which openings for receiving of pipe sections are provided. The reinforcement elements can pass through these pipe sections the concrete structure are passed through, so that a continuous reinforcement is guaranteed. This version uses a tube that is smooth on the outer surface, which can be easily inserted into a prepared through opening.

Furthermore, a cantilever panel and / or joint element for reinforced building structures is known become (EP-A1-0 745 734), in which transverse to the vertical longitudinal median plane of this Cantilever element forming tubular body are used. The tubular body have on their outer surface a plurality of ribs running in the circumferential direction, over which the tubular body can be supported on the inner wall of a cylindrical through opening in the structure is. To prevent bubbles from forming when pouring concrete, suggested in the Wall of the tubular body to provide several holes through which the air bubbles escape can.

In another known embodiment of an insulating transition element, in particular for Cantilever panel connections (DE-U-89 05 521), is in the area of the passage for continuous Reinforcements used with both ends projecting over the pipe, the The height of the passage cross section of this tube is greater than the width of the passage cross section. The tube is provided in its upper apex area with an air outlet path which is groove-like Continuation of the tube passage cross section is formed and from the longitudinal center of the tube to the two ends of which rise. Through this, taking place on two sides Extension of the pipe is difficult to assemble the same in the structure, since such a pipe is not can simply be inserted into a through opening. So one thing is needed special design effort when building the structure. DE-U-8 905 521 discloses a cantilever and / or joint element, which has the features of the preamble of Claim 1 has.

The present invention has for its object a tubular body for cantilever and / or To create joint elements with which the formation of air bubbles when pouring with concrete can be prevented, but which is nevertheless economically producible and can be easily installed in a prepared through opening in the building.

According to the invention this is achieved by the features specified in claim 1.

The present invention therefore proposes a combination in terms of construction, by the advantageous design of a conical extension of the tubular body to at least one End of the same is provided in order to remove air bubbles during the pouring process to accomplish safely, and yet the possibility is created of such a tubular body to be able to slide into a prepared through opening. The through opening is that Cross-section of the tubular body adapted in the outer area, but can be the same throughout Dimensions are executed. The configuration according to the invention has an effect here in particular advantageous because despite the conical expansion of the tubular body from the protruding ribs a common envelope cylinder is formed so that the tubular body in its axial direction in a cylindrical through opening can be inserted.

Despite these very essential inventive measures, it is an economical manufacturing option guaranteed for such tubular body. Because the circumferential ribs ensure that the outer surface of the tubular body and the inner wall of the through opening do not rest against each other over the entire surface, the tubular body can be relatively simple and without Breaking out sections of the building structure are pushed into the through opening. But because the ribs running in the circumferential direction are, so to speak, transverse to the direction of insertion, cause an optimal inhibition against withdrawal. Therefore, it is only with special Force can be exerted, the tube body out of the through opening after insertion pull it out.

According to a special embodiment it is provided that the tubular body towards both ends is flared. This is advantageous because it opens the way for one Escaping air bubbles when pouring concrete can be significantly reduced. The Air bubbles are removed from the tube body in both directions, so that the guarantee is given that after filling with concrete no more air bubbles inside the tube body available. In this context, it is advantageous if the tubular body consists of two approximately starting from its center with respect to its longitudinal extent frustoconical sleeve sections is formed.

A particularly useful design is seen in the fact that the tubular body over its entire Length has an approximately constant wall thickness, with each other in the axial direction following ribs have different radial dimensions. As a result, it becomes very little Material needed for the tubular body, and there are also no very special material accumulations gives. This is also of particular advantage for the manufacture of the tubular body itself.

It is further proposed that several at a distance on the outer surface of the tubular body parallel ribs are provided, which have different radial sizes Have dimensions so that the outer limits of a common envelope cylinder or form a common envelope prism or a common envelope cone. To despite the essentially tubular body formed by frustoconical sleeve sections with an outer boundary To create a common envelope cylinder, the ribs are in at different locations axial direction in relation to the length of the tubular body is simply different in height educated. Accordingly, the outer boundaries of the ribs form the common one again Envelope cylinder to the tubular body in a simple manner in a prepared through opening to be able to insert. This configuration, despite the possibility of axial Pushing the tubular body into a through opening, exact centering and support of the tubular body in the through opening possible.

According to another embodiment variant, the ribs run helically on the Surface of the tubular body and have different radial heights based on their length. Even with such an arrangement it is achieved that the outer boundary of the helical extending ribs form a common envelope cylinder. The retention force for the Once inserted, the tubular body is still through the helical ribs further increased.

In order to enable a constant and problem-free assembly of the tubular body, proposed that to form a stop flange at one end or at a distance from one At the end of the tubular body a rib with a larger diameter than the other ribs is provided. In this case, the tubular body must always be in the same side Through opening in the building can be inserted, however, to determine the depth of penetration a stop flange is always available.

Fig. 1

einen Vertikalschnitt durch ein Kragplattenelement im Bereich der zur Aufnahme von Zug- und/oder Druckbewehrungselementen ausgebildeten Durchgangsöffnungen;

Fig. 2

eine Frontansicht eines aus mehreren Einzelteilen zusammengesetzten Baukörpers für ein Kragplattenelement;

Fig. 3

ein teilweise aufgeschnittenes Rohrstück, welches in die Durchgangsöffnungen im Kragplattenelement eingesetzt ist.

Further features according to the invention and special advantages are explained in more detail in the following description with reference to the drawing. Show it:

Fig. 1

a vertical section through a cantilever plate element in the region of the through openings designed to accommodate tension and / or compression reinforcement elements;

Fig. 2

a front view of a structure composed of several individual parts for a cantilever panel element;

Fig. 3

a partially cut piece of pipe, which is inserted into the through openings in the cantilever plate element.

In the following description we speak of a cantilever plate element, which at reinforced building structures at the transition between a ceiling tile and a cantilever Plate, e.g. a balcony slab is used. However, the measures described are the same Can also be used for joint elements, where it is usually a question of between ceiling sections Introduce heat and sound insulation elements. Even in such applications are, if necessary, tensile and / or compression reinforcement elements and possibly shear bars use.

In the cantilever panel element shown here, a structure 1 is provided, which consists of a heat-insulating foam or another heat-insulating or soundproofing Material is made. The structure 1 serves to accommodate tension and / or compression reinforcement elements, which are inserted into tubular bodies 3 inserted into through-openings 2 can. Through the tubular body 3, the ceiling plate and the adjoining it projecting reinforcement elements in the tensile and pressure areas be inserted. This means there are no interruptions in the reinforcement. Further can be used in the cantilever element shear bars 4, which is inclined to Horizontal middle section 5 and a straight line on both sides of the structure 1 have extending region 6, 7. These areas 6, 7 can e.g. axially parallel to The central axis 8, 9 of the corresponding tubular body 3 run.

In the particular embodiment of a cantilever plate element shown here, the Structure 1 of several components 10, which can be seen in FIG. 2. The Shear bars 4 are here, for example, with their obliquely extending central section 5 in one a lateral edge of a component 10 formed groove used. One this way inserted shear bar is held captive.

The mutual connection between the components 10 can by at the side Tongues and grooves formed at the edge limits, this tongue and groove connection also is made possible by direct attachment, especially since the undercut areas are selected of the material of the components 10 are elastic in a certain range. A stable bracket and Alignment of components 10 can e.g. be guaranteed if at their top and / or a U-shaped holding rail 16 is slipped on or pushed on at the lower edge region.

The measures according to the invention to be explained in more detail below can of course be made also use in other constructions of cantilever panels and / or joint elements. The Cantilever panels and / or joint elements can also be designed as one-piece elements or from upper and lower parts, which are placed on top of each other in the vertical direction, consist.

The present invention is essentially about the special training of Tubular body 3, which serve to accommodate tension and / or compression reinforcement elements. How already carried out, are in the building 1 or those forming such a building 1 Components 10 through openings 2 are provided, in which the tubular body 3 can be used. The Tubular body 3 has several, at least approximately in the circumferential direction, on its outer surface 11 extending ribs 17, via which the tubular body 3 is non-positively and / or positively the inner wall of the through opening 2 in the building 1 can be supported. Through a corresponding fit is a corresponding friction of the tubular body 3 used in the Through opening 2 achieved so that there is a positive connection. Because the difference between individuals Ribs 17 remaining portions of the inner wall of the through opening 2 after Insert the tubular body 3 back elastically, practically in the area of Inner wall of wave-shaped depressions and elevations, so that in addition also Form fit between the tubular body 3 and the inner wall of the through opening 2 is created.

In order to achieve the appropriate fit, the outer dimensions B of the ribs 17 slightly larger than the diameter of the through openings 2. The difference in dimensions are chosen so that nevertheless a correspondingly simple insertion of the tubular body into the through opening is possible without the risk of the generally breaking out Foam existing structure 1 is given.

Advantageously, a plurality of ribs 17 running parallel to one another at a distance are on the External surface 11 of the tubular body 3 is provided. It is therefore a multiple support the inner wall of the through opening 2 possible, so that there is never a tilting movement of the used tubular body 3 can come, even then, should be a one-sided load available.

Another embodiment provides that the ribs 17 are not parallel to one another Elevations are formed, but helically on the surface 11 of the tubular body 3rd run. The tubular body 3 can thus be used in a kind of screw rotation, so that there is an additional retaining force if the tubular body 3 is only in the axial Direction is charged.

In the particular embodiment according to the invention, the tubular body 3 at least runs sectionally expanded from its length to at least one end. It is useful that the tubular body 3, as shown in FIGS. 1 and 3, to both ends is conically expanded. This conical extension can also come from one end of the tubular body starting to lead to the other end, so that they only in one direction Seen axis of the tubular body runs. The tubular body is advantageously made of two approximately the middle of which, based on its longitudinal extension, has frusto-conical sleeve sections 21 and 22 formed so that the conical extension to both ends of the tubular body 3 runs approximately in the same slope. However, truncated cones are also possible here Sleeve sections, which are of different lengths and possibly different Have inclination angles. It is also conceivable to have a plurality of adjoining truncated cones To provide sleeve sections that have different angles of inclination.

The outer boundaries 20 of the ribs 17 are at least in the one to be inserted into the structure 1 Area designed or arranged so that it is essentially a common envelope cylinder form. The tubular body 3 can thus be inserted into a through opening 2, the External boundaries 20 of the ribs 17 on the inner wall of the through openings 2 for contact come. A safe system is essentially in spite of the formation of the tubular body frustoconical sleeve sections guaranteed. Of course it is for manufacturing reasons advantageous if the ribs 19, which in the inserted state outside of the building 1 come with their outer borders 20 at the same height as the outer borders 20 of the ribs 17 lie, i.e. also lie in the common envelope cylinder.

The most advantageous training shown in the drawing provides the tubular body 3 itself to be formed over its entire length with an approximately constant wall thickness W, where then of course the ribs 17 successive in the axial direction different radial Have dimensions A1 or A2, etc., so that their outer limits 20 the common Form the envelope cylinder.

As can be seen from the figures, the length X of the tubular body 3 is greater than the thickness D of the Structure 1, so that the tubular body 3 with its two ends on the front 13 of Structure 1 can protrude. Of course, it is also conceivable that the tubular body only on protrudes on one side, but it is the same for reasons of strength and both ends Load options make sense to let the tubular body 3 protrude with both ends. At the Outer surface 11 of the projecting ends of the tubular body 3 is or are also one or several rib (s) 19 are provided, the ribs 19 of the filled concrete or Concrete milk are enclosed and thus a seal practically similar to one Form the labyrinth seal.

At one end or at a distance from one end of the tubular body 1 there is a special rib compared to the other ribs 17 of larger diameter E to form a stop flange 18 intended. This is always a constant depth of penetration of the tubular body 3 in the Through opening 2 possible. The stop flange 18 always abuts the front 13 of the Building 1.

The tubular body 3 can, as shown in the drawing, on the outer surface 11 with two or several axially continuous webs 12 may be provided. These webs 12 are on theirs, for example Outer boundaries are designed in a straight line, but compared to the outer boundaries 20 of the Ribs 17 and 19 slightly set back. This construction can still improve Strength of the tubular body 3 can be achieved. In addition, the measure can Dimensional accuracy of the tubular body, especially in the production as a plastic injection molded part, be improved.

In the description of the figures above, it is always assumed that the tubular body 3 or whose outer envelope surface is cylindrical. However, it is quite conceivable that Execute through opening, for example, square in cross section, in such a If the outer boundaries 20 essentially form a common envelope prism. It is conceivable, the sleeve sections 21 and 22 nevertheless frustoconical or in a corresponding Adaptation to be truncated pyramid. In principle, it is also possible to set the external limits Arrange 20 of the ribs 17 instead of as an enveloping cylinder so that they approximately form a slightly conical envelope cone, with the passage opening then also correspondingly would be frustoconical. Then it is very easy to insert the Pipe body possible in the through opening, because only in the last insertion area a direct Contact between the outer boundaries 20 of the ribs 17 and the inner wall of the through openings 2 comes about.

The tubular body according to the invention is advantageously made of plastic, however other materials can also be used. It is also conceivable to make such tubular body 3 Metal, e.g. Aluminum or stainless steel.

In the above description, only ribs 17 and 19 and a stop flange are used 18 spoken. However, with regard to the cross sections of these ribs to be used, with regard to the spacing of the ribs from one another and with regard to the formation of such ribs given a wide range of variations. For example, it would also be possible to have two Arrange ribs 17 relatively close to each other in pairs, then to the next pair of ribs a correspondingly greater distance would remain. It would also be conceivable to cross-section the ribs e.g. sawtooth-shaped to have little resistance when pushed in, nevertheless but to achieve an optimal effect against pulling out. The term ribs is still too note that such ribs in the same way by a plurality of successive grooves can be formed. The only principle that should always be realized is that at the Outer surface of the tubular body several, at least approximately extending in the circumferential direction Ribs are present, through which the tubular body is non-positively and / or positively on the Can support the inner wall of the through opening. Only through these measures are one Optimal and simple manufacture, simple assembly and a secure hold of the tubular body guaranteed.

Claims (7)

1. A cantilever slab and/or joint element for reinforced structures, having a one-piece or multipart structural member (1) designed to accommodate tension and/or compression reinforcing elements and, optionally, transverse force rods (4), wherein to accommodate the tension and/or compression reinforcing elements through-openings (2) extending approximately transversely to a vertical longitudinal centre plane thereof are provided in the structural member (1), and with a tubular member (3), wherein the latter is or can be inserted into the through-opening (2), which on its outer surface has a plurality of ribs (17) extending at least approximately in a circumferential direction, by way of which the tubular member (3) can bear in a force-locking and/or form-locking manner on the inner wall of the through-opening (2) in the structural member (1), characterised in that the tubular member (3) with its passage cross-section extends at least in section conically widened in relation to its length at at least one end, and in that at least in the zone to be inserted into the structural member (1) the outer boundaries (20) of the ribs (17,19) form substantially a common enveloping cylinder or a common enveloping prism or a common enveloping cone.
2. A cantilever slab and/or joint element according to Claim 1, characterised in that the tubular member (3) is formed widening conically towards both ends.
3. A cantilever slab and/or joint element according to Claim 1 or 2, characterised in that the tubular member (3) is formed by two sleeve portions (21,22) which extend frustoconically approximately from its centre, in relation to its longitudinal extension.
4. A cantilever slab and/or joint element according to any one of Claims 1 to 3, characterised in that the tubular member (3) is of approximately constant wall thickness (W) over its entire length, wherein the ribs (17) succeeding one another in axial direction have different radial dimensions.
5. A cantilever slab and/or joint element according to any one of Claims 1 to 4, characterised in that a plurality of ribs (17) extending parallel and spaced apart are provided on the outer surface (11) of the tubular member (3), which ribs have radial dimensions (A1,A2) of varying magnitude so that their outer boundaries (20) form a common enveloping cylinder or a common enveloping prism or a common enveloping cone.
6. A cantilever slab and/or joint element according to any one of Claims 1 to 4, characterised in that the ribs (17) extend helically on the surface (11) of the tubular member (3) and have different radial height in relation to their length.
7. A cantilever slab and/or joint element according to any one of the preceding Claims, characterised in that to form a stop flange (18) at one end or at a distance from one end of the tubular member (3) a rib is provided having larger diameter than the other ribs (17,19).

Images