DE202016103203U1 - Designed as a thrust element device for reinforcing a concrete pavement - Google Patents

Abstract

Device designed as a thrust element for reinforcing a concrete pavement, in particular against punching in the region of its support on a support, comprising a tubular body (FIG. 2A) and a lower side (2B), a radial outer surface (2C) and a tube axis (2D) ( 2) for selectively passing at least one strand, such as at least one cable, a pipe or the like, transversely to the concrete surface, with at least one collar-shaped anchoring element (1, 1) extending over the radial outer surface (2C) of the tubular body (2), preferably uninterruptedly, circumferentially. 1A, 1B), characterized in that the at least one anchoring element (1; 1A, 1B) at least on its the bottom (2B) of the tubular body (2) facing side, at least at the transition to the outer surface (2C) of the tubular body, with the outer surface forms an angle α between 91 ° and 150 °.

Description

FIELD OF THE INVENTION

The invention relates to a device designed as a thrust element for reinforcing a concrete floor according to the preamble of claims 1, 3 and 4. Accordingly, such a thrust element comprises a top and bottom, a radially outer surface and a tube axis having tubular body for selectively performing at least one Strand, such as at least one cable, a pipe or the like, across the concrete floor. The tubular body has at least one, the radially outer surface of the tubular body circumferentially superior collar-shaped anchoring element. Preferably, the anchoring element orbits the radial outer surface of the tubular body without interruption. Such a push element is used in particular against the punching of the concrete ceiling in the region of its support, such as a support.

TECHNOLOGICAL BACKGROUND

Such pushers are known in principle, in particular from the DE 199 37 414 A1 as based on the 1 to the prior art explained below: One on a support 4 ' overlying concrete ceiling 3 ' is on site with a bending tension reinforcement 5 ' provided and has in the support area a tube 2 ' on top of that, the concrete ceiling 3 ' from their top to their bottom penetrates and at their front ends with the pipe 2 ' outside protruding ridges 1' is provided to the transverse force stress of the ceiling plate via contact pressure between the beads 1' and the surrounding concrete via a frictional connection of the tube 2 ' with the beads 1' in the pipe 2 ' initiate. The pipe 2 ' should thereby experience a tensile stress in the direction of its axis. By tubular member provided with beads, the adjacent concrete to be wrapped and counteracted a punching through the support through the ceiling. Through the pipe 2 ' can be passed various strands such as those of building services, be it fluid-carrying lines, cable strands, cable guide tubes and the like.

It has been found that the quality of the surrounding concrete, u. A. is due to the segregation, worse than in the rest of the concrete floor, in particular, the compressive strength of the concrete is of reduced quality. As a result, the concrete ceiling in the region of the component undergoes a weakening, which should actually prevent the device.

PRESENTATION OF THE INVENTION

Based on this, the present invention seeks to provide a thrust element comprising a tubular body for reinforcement of a concrete floor, which allows in its immediate vicinity to produce a concrete pavement with high concrete quality in particular compressive strength of the concrete.

To solve this problem, a generic thrust element with the features of claim 1 is proposed. Accordingly, it is provided that the at least one, the tubular body circumferentially superior collar-shaped anchoring element on at least its underside tubular body facing side, at least at the transition to the outer surface of the tubular body, with the outer surface of the tubular body forms an angle α between 91 and 150 ° , The angle α is preferably between 95 and 125 ° and most preferably an angle between 100 and 110.

Extensive tests have shown that the above-mentioned reduction in the quality of concrete in the range of a generic thrust element u. A. Based on a change in the mixing ratio between the cement, the cementum sand / gravel and the mixing water, ie on a separation. These mixing shifts are largely prevented by the measure according to the invention to completely.

The anchoring element can form an angle α between 91 ° and 150 ° overall on its side facing the underside of the tubular body ( 3 ) or only at its transition to the outer surface of the tubular body, being understood in the context of the invention with the transition, a transition zone. As a transition to the outer surface of the tubular body in which this transition with the outer surface forms an angle α between 91 ° and 150 °, u. A. a circumferential, in particular circumferentially closed, deformation zone of the tubular body, such. In 4A . 4B ,

According to another embodiment of the invention of independent inventive importance, is in a generic thrust element, the area ratio of the viewed in the axial direction projection surface of the collar-shaped anchoring element to the viewed in the axial direction projection surface (cross-sectional area) of the tubular body 1 to 20, preferably 3 to 10 and particularly preferably 7, 5 to 8.5. As a result, an alternative or cumulative to the features of claim 1 is an excellent shear force reinforcement the concrete ceiling reached by the push element. The area ratio which is specifically preferred within the bandwidths (the value ranges) of the area ratios is, preferably, dependent on the tensile strength of the tubular body and / or the anchoring element and / or depending on the diameter of the tubular body and / or depending on the respective concrete quality selected. It may be relatively large at a relatively high tensile strength and / or at a relatively large diameter of the tubular body and / or at relatively low concrete quality.

The effectiveness of the anchoring element is improved if its distance a from the adjacent upper or lower side ( 2C respectively. 2 B ) of the tubular body is 1-5 cm, preferably 2-4 cm.

In yet another embodiment of the invention of independent inventive importance, the tubular body on at least one of its front ends on the relevant front end, preferably after axially outwardly projecting, closure element for closing the pipe opening. It has been found that the planning of cable penetrations through concrete floors is difficult. In order to ensure the most variable arrangement of cable bushings, it is therefore proposed to open the generic pushers only in the actual case of need for line implementation, so they keep closed from home and open only in the eventual needs identified trap. This allows the use of a plurality of pusher elements in the support area without weakening the concrete pavement.

It is particularly preferred if the closure element projects beyond the relevant front end of the tubular body to the outside axially. As a result, the front ends of the tubular body remain at a predeterminable distance from the concrete ceiling surface. This results in a further improvement of the concrete quality, in particular the compressive strength of the concrete in the immediate vicinity of the pusher result. The axial distance with which the closure element projects beyond the pipe opening towards the concrete ceiling surface is preferably 1-5 cm and more preferably 2-4 cm.

The closure element may be made of a variety of materials and in particular made of plastic, or consist of fire-retardant material. In particular, the closure element may have a spacer. Such a spacer may have the shape of a pilot extension and / or a positioning extension. Both serve the distance attitude to the lower concrete slab formwork or to the upper concrete ceiling surface. In the case of training as a pilot extension, it serves to rediscover the position of the pusher element after casting the concrete pavement. This can be further supported by a striking color of the pilot plant. Positioning extensions are especially on the bottom of the pusher advantage and can simplify the preferred rectangular orientation to the formwork of the concrete pavement.

If the closure element consists of fire-retardant material or has a fire-retardant material zone and / or the closure element is completely or partially filled with fire-retardant material, a reduction in the risk of fire in the region of the push elements not required for cable bushings is achieved.

If the tubular body in the region of its top and / or its underside has a cross-sectional widening towards the pipe end, this allows in a simple manner, axially to clamp closure elements between the top and bottom.

The thrust element, in particular its tubular body and / or the laterally projecting collar-shaped anchoring element, may preferably be made of steel, but alternatively also of fiber-reinforced composite material or plastic. The cross section is preferably, but not necessarily circular cylindrical.

The tubular body may be provided with a slippery or falling-out barrier for packing in its interior.

Push elements according to the invention can be used both as single push elements or in groups. But they can also be part of a broader punching reinforcement and z. B. be concatenated with other punching reinforcement elements.

The above-mentioned and the claimed components and process conditions to be used according to the invention described in the exemplary embodiments are not subject to special exceptions in terms of size, shape, material selection and technical design, so that the selection criteria known in the field of application can be used without restriction

Further details, features and advantages of the subject matter of the invention will become apparent from the dependent claims, as well as from the following description and the accompanying drawings, 2 to 10 in which exemplary embodiments are illustrated. Also, individual features of Claims or embodiments may be combined with other features of other claims and embodiments.

BRIEF DESCRIPTION OF THE FIGURES

In the drawing show:

2 a concrete floor with a thrust element for transmitting transverse forces in vertical section, wherein the left and the right half of the figure show different but combinable embodiments;

3 a second embodiment of a thrust element in longitudinal section as a detailed representation of the upper end region;

4A / B a third and fourth embodiment of a thrust element in longitudinal section as a detailed representation of the upper end region;

5A a fifth embodiment of a cast in a concrete pavement thrust element in vertical section as a detailed representation of the upper end region;

5B a sixth embodiment of a cast in a concrete pavement thrust element in vertical section as a detailed representation of the lower region;

5C a seventh embodiment of a cast in a concrete pavement thrust element in vertical section as a detailed representation of the lower region;

6 an anchoring element for a thrust element in vertical section with lower chamfer for a welded connection with the tubular body;

7 another anchoring element accordingly 6 but without lower chamfer;

8th a concrete floor resting on a column with several pushing elements in the vicinity of the column;

9 a punching shear reinforcement for a concrete pavement in a star-shaped arrangement around a column supporting the concrete slab with linked shear-cut reinforcement elements as well as

10 another thrust element in vertical section and detail of the lower area.

DETAILED DESCRIPTION OF EMBODIMENTS

The embodiment according to 2 shows a first push element in two different installation situations in a concrete floor 3 , The generally with 10 referred to thrust element comprises a tubular body 2 with preferably circular-cylindrical cross section. At least one, preferably two anchoring elements 1 ;, 1A . 1B circulate, preferably uninterrupted, the radial outer surface 2A of the tubular body 2 and overhang these collar-shaped. On her the bottom 2 B of the tubular body 2 facing side form the anchoring elements 1 ; 1A . 1B with the outer surface 2A of the tubular body 2 an angle α greater than 90 °. This is in the illustrated and so far preferred embodiment about 105 °. In this way, during concreting and / or during the subsequent shaking of the concrete, a development of the concrete substantially free of segregation also develops in the immediate vicinity of the pushing element.

The anchoring element (s) 1 ; 1A . 1B and / or the tubular body 2 consist, preferably, of steel, but alternatively also of fiber-reinforced composite material or plastic.

The connection of the collar-shaped anchoring element 1 with the outer surface 2A tubular element 2 can be done in any way, such. B. as a press fit, by way of Reibverschweißung or, as interrupted or circumferentially closed weld S, as in 3 is shown by way of example. This weld S is used in the illustrated and thus preferred embodiment u. A. as a transition to the outer surface 2A of the tubular body 2 being this transition with the outer surface 2A forms an angle α between 91 ° and 150 °. At the in 2 in the left half of the embodiment shown in which the top 2C of the tubular body 2 with the surface 3A the ceiling 3 is flush, is the top of the tubular body facing side of the upper anchoring element with a distance a from the top 2C of the pushing element 10 arranged away. The distance a is preferably 1-5 cm and more preferably 2-4 cm. In the lower anchoring element 1B is the appropriate distance to the bottom 2 B of the tubular body 2 slightly lower in the illustrated preferred embodiment. In addition, the bottom ends 2 B of the tubular body 2 with a distance b above the lower surface 3B the concrete ceiling. This distance b is preferably 1-5 cm and more preferably 2-4 cm.

In the embodiment on the right side of FIG 2 ends up the top 2C of the tubular body 2 with axial distance b from the surface 3A the concrete ceiling 3 , This distance b preferably has the dimension as at the lower end of the thrust element 10 ,

In the embodiment according to 2 is the area ratio of the viewed in the axial direction projection surface F1 of the collar-shaped anchoring element 1A and 1B for viewed in the axial direction projection surface F2 of the tubular body 2 each 8.0 and corresponds to a preferred embodiment so far. This can be ensured that a certain, z. B. approved by building law, concrete compressive strength is not exceeded. The in the tubular body 2 arising / desired tensile force can by a selection of that area ratio and / or by a corresponding selection of the tensile force of the tubular body 2 used material, adjusted so that the pusher 10 replaced a conventional double-headed anchor. The projected in the axial direction projection surface F1 of the collar-shaped anchoring element can be chosen so that the consequent concrete pressure taking into account the by the "recess" (tube cavity) fallen shear resistance of the concrete pavement a conventional double-headed anchor, z. B. of solid material (steel) with a diameter of 25 mm, corresponds.

The tubular body can with at least one effective in its interior slipping or falling out 9 , such as B. a bead be provided to z. As a, not shown in the drawing, the tubular body completely or partially filling fire-retardant and / or moisture-inhibiting material layer to immobilize.

To turn off the 2 apparent distances b above and / or below the front ends of the tubular body 2 in a concrete ceiling 3 can realize closure elements 6 ; 6A . 6B be provided, which close the upper and / or lower tube opening, preferably at the tube ends. In principle, closure elements can serve alone to keep the tube opening closed when there is no need for cable bushings. However, the tube closure elements preferably have a dual function in that they also serve as spacers. Examples of such distance attitude emerge 5A to 5C ,

According to the embodiment 5A If the spacer is a pilot extension 8th , z. B. in the form of a cam, pin or the like, extending in the direction of the intended concrete surface 3A the concrete ceiling to be cast 3 extends and is sized to fit in the concrete surface 3A seems to be visible or possibly slightly protruding from it. This is the position of the thrust element 10 subsequently findable within the finished poured concrete floor, so that by means of a drill or the like at this point the concrete ceiling to the interior of the tubular body 2 opened and z. B. can be used for cable bushings.

A provided approximately at the lower end of the pusher spacer can be used as a positioning extension 7 be used to z. B. an upright positioning of the pusher 10 on the slab formwork of the concrete floor to be concreted 3 to allow the push element 10 So z. B. let stand upright, as from 5B seen.

A closure element 6 but can also be used in the sense of a fire protection element, as from 5C can be seen, according to the closure element 6 a fire retardant material layer 5 includes.

A special kind of a double-ended, re-releasable closure of the push element 10 turns out 10 , after which a plug-like closure element 6 by means of a pull rod 4 drawn into a querschnitterweiterte zone of the pipe end and against the tubular body 2 can be tightened.

Instead of a separate anchoring element shown in the described embodiment, this can also in the way of flange-like deformations or annular sprains of the tubular body 2 be formed in one piece from this, as from 4A and 4B seen.

While the previously described embodiments individual thrust elements 10 Shear elements may also be part of a more extensive punching shear reinforcement, in particular from 9 seen.

LIST OF REFERENCE NUMBERS

1

anchoring element

1A, 1B

upper or lower anchoring element

1C

welding

1D

chamfer

2

tubular body

2A

radial outer surface

2 B

bottom

2C

top

2D

pipe axis

2E

Sectional widening

3

concrete ceiling

3A

surface

3B

undersurface

3C

support

4

pull bar

5

fire retardant material

6

closure element

7

positioning projection

8th

Pilot extension

9

Slip or fall-out barrier

10

push element

100

Studrails

F1

Viewed in the axial direction projection surface of the collar-shaped anchoring element

F2

Viewed in the axial direction projection surface of the tubular body

S

Weld

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• DE 19937414 A1 [0002]

Claims (12)

Device designed as a thrust element for reinforcing a concrete floor, in particular against punching in the area of its support on a support, comprising a top ( 2A ) and a bottom ( 2 B ), a radial outer surface ( 2C ) and a pipe axis ( 2D ) having tubular body ( 2 ) for selectively passing at least one strand, such as at least one cable, pipe or the like, across the concrete pavement, with at least one of the radially outer surfaces ( 2C ) of the tubular body ( 2 ), preferably continuously, circumferentially superior collar-shaped anchoring element ( 1 ; 1A . 1B ), characterized in that the at least one anchoring element ( 1 ; 1A . 1B ) at least on its underside ( 2 B ) of the tubular body ( 2 ) facing side, at least at the transition to the outer surface ( 2C ) of the tubular body, forms with the outer surface an angle α between 91 ° and 150 °. Apparatus according to claim 1, characterized in that the angle α 95 to 125 ° and particularly preferably 100 to 110 °. Device according to the preamble of claim 1, in particular according to claim 1 or 2, characterized in that the area ratio of the viewed in the axial direction projection surface of the collar-shaped anchoring element ( 1 ; 1A . 1B ) to the viewed in the axial direction projection surface (cross-sectional area) of the tubular body ( 2 ) Is 1 to 20, preferably 3 to 10 and, more preferably, 7.5 to 8.5. Device according to one of claims 1 to 3, characterized in that the distance (a) of the anchoring element ( 1 ; 1A . 1B ) from the adjacent upper or lower side ( 2C respectively. 2 B ) of the tubular body ( 2 ) Is 1-5 cm, preferably 2-4 cm. Device according to the preamble of claim 1, in particular according to one of claims 1 to 4, characterized in that the tubular body ( 2 ) at at least one of its front ends, a closure element ( 6 ) for closing at least one tube opening. Apparatus according to claim 5, characterized in that the closure element ( 6 ) the relevant front end of the tubular body ( 2 ) surmounted axially outward. Apparatus according to claim 5 or 6, characterized in that the closure element ( 6 ) a spacer in the form of pilot extension ( 8th ) and / or positioning extension ( 7 ) having. Device according to one of claims 1 to 7, characterized in that the distance (b) of the thrust element ( 10 ) from the adjacent upper or lower surface ( 3A respectively. 3B ) of the concrete floor ( 3 ) Is 1-5 cm, preferably 2-4 cm. Device according to one of claims 5 to 8, characterized in that closure element ( 6 ) consists of fire-retardant material, comprises a fire-retardant material zone and / or is completely or partially filled with fire-retardant material. Device according to one of claims 1 to 9, characterized in that the tubular body ( 2 ) in the area of its top and / or bottom ( 2C respectively. 2 B ) has a cross-sectional widening to the adjacent tube end cross-section. Device according to one of claims 1 to 10, characterized in that the thrust element ( 10 ) Is part of a more extensive punching reinforcement. Device according to one of claims 1 to 11, characterized in that the tubular body ( 2 ) is completely or partially filled with an insulating, such as fire retardant and / or moisture-inhibiting material.

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