DE4429605A1 - Impact sound absorbing support element - Google Patents

Abstract

A socket sleeve (3) of steel or polymer concrete, plastics or other material is provided in the structural element (1) such as a step which is to be supported. A transverse force bolt (5) which interacts at one end with the socket (3) and protrudes at the other towards the other structural element (2) is held in the socket secured against rotation relative to its horizontal transverse axis by a lock (14,15) which can be removed after installation of the concrete step (1). The lock has two force transfer devices (14,15) spaced from each other in the axial direction of the pin and acting opposite each other in a vertical plane. At least one of the transfer devices can be a screw accessible from the outside face (16,11) of the step.

Description

The invention relates to a device for kicking sound-absorbing vertical supports of a first building element, in particular a precast concrete element, to an egg nem adjacent second component, with a receptacle in one of the components and with a shear force mandrel, that cooperates with the recording at one end and with its other end towards the other Device protrudes, in the support area between Intake and transverse force mandrel an impact sound absorbing, elastic layer is arranged.

Such a device is e.g. B. from DE-GBM 78 27 042 known. It is used there by one prefabricated stair run from running boards and since Lichen, made of steel profiles under stairs acoustic decoupling on the inner wall of a To house. The shear force mandrel is fixed connected to the steps and the recording is in the house wall as a sleeve with a sound-absorbing cover clothes integrated.

For prefabricated stair flights made of concrete, the Impact sound insulation has so far usually been carried out on the stairs pen run and trained at the support point reached step folds, which correspond by a  The impact sound-absorbing elastic layer is separated will. These step folds have the disadvantage that they require a lot of formwork, both in the factory prefabrication of the staircase as well as in the construction of the on-site production deposit, which z. B. on a stair landing finds.

The production of the step fold must in particular the because of being carried out with high precision since a subsequent adjustment is not possible.

In addition, the construction of the step folds requires this probably an additional one in the stairs and on the platform side stirrup reinforcement.

Ultimately, there is between the stairs and Stair pedestal formed joint also the danger that fix dirt, small stones etc. here then form a sound bridge.

To overcome these drawbacks, it has been suggested in to inset the transverse force mandrels protruding from the stairs kidneys, which then together with corresponding recordings act on the construction site in the supporting structure element can be attached. The corresponding runs de In addition, in the factory Fer the stairs in this precast concrete the one facing the later neighboring component Concreting a butt surface a sleeve that to the ge called butt surface is open.

After the concrete of the prefabricated precast concrete has tied and rigidly embraces the sleeve, is in the  Sleeve a stuck shear pin inserted still protrudes from the sleeve with about half.

On the construction site, the construction is prepared in this way ment with protruding transverse force mandrels then with a Crane positioned. At this point they are Stair platforms as components on which the Trep should support the pen barrel, at least as far as prepared, that on them recordings for those on the stairs transverse shear pins are present. The recordings have an elasto on the underside layer on which the shear force mandrels rest and about the no vibrations between the shear force mandrel and recording can be transferred. So that supports the flight of stairs over the ones in the pictures the transverse force mandrels are impact sound insulated on the be neighboring components. A disadvantage of one such device is on the one hand that the high pass accuracy of the sleeve and the shear force mandrel ensures a high degree of fer prerequisites and that the recording must be positioned precisely on the stair landing in order to with the cross attached to the stairs at the factory to be able to work together exactly. It is also the exact height of the contact surface of the lateral force thorns in the shot crucial since is influenced that the bottom of Trep pen platform and stair run without a paragraph can merge.

Furthermore, the Vorrich discussed so far the recording as a separate part to the construction site be transported to be prepared there already to be able to be built. This means a relative high logistical effort.

An object of the present invention is to achieve this to avoid.

But here is a simple omission of the recording not possible either, because it contains the impact sound insulation Layer is attached. It is also not easy Lich, this elastomeric layer in the then as a recording Acting sleeve holding the lateral force mandrel on the trep to take over the course of the pen, since this raises the problem would result that the sleeve no longer holds the transverse force mandrel sitting and rigid. On the one hand, this results in that when transporting the flight of stairs to the installation site the thorn can get lost and secondly during installation of the flight of stairs the shear force arbor due to the prevailing forces in the sleeve and would jam. This in turn leads to the The edge of the elastomer layer is too compressed and the impact sound decoupling function can no longer perceive.

Another object of the present invention is therefore, a device of the type described above admit that is designed so that at scheduled Overloading in a stair run provided elastomer layer do not occur can and it is ensured that the impact sound insulating function of the elastomer layer is not disadvantageous is affected.

This object is achieved in that the recording arranged in the component to be supported and the transverse force mandrel is locked in the essentially non-rotatable with respect to its horizontal Transverse axis is held in the recording and that the Lock can be canceled.  

The object of this invention has the advantage that the positioned component to be supported at Do not attach only by one under this component support that is complex to set up can be held got to. Such a support would take the own weight of the component to be supported Ver tical forces, so that with it none as described above, inclination of the shear force mandrels appearances. Instead of such a support under the building elements are directly on the shear force mandrel as a moment supports provided locking devices that hold the lateral force mandrel in a horizontal position until originally free section kept torsion-proof becomes.

This twist-proof holding of the originally free Ab cut is achieved by using the construction as before ment, such as B. the above-mentioned stair run, with the protruding transverse force mandrels is lowered so that the shear force mandrel in the area of the concrete renden, supporting component is located, for. B. yourself supported on the underpinning of a stair landing. This stair landing is then poured out of concrete and then after the concrete, which the shear force pins on their extending portion outside the receptacle catches, tied, is about this section Prevent twisting or tilting of the shear force mandrel different.

Accordingly, the shear force in the Recording on the part to be supported, d. H. on the stairs holding lock can be released or released. From then there is no structure-borne noise transmission more possible via this locking and the desired Impact sound insulation is fully guaranteed.  

It is advantageous to use the shear force mandrel on its ur originally free end with a height adjustment screw to provide for height fixation. For one, it can the component to be supported before concreting the adjacent components adjusted in height or be fit and the other is through the support of the shear force mandrel between formwork and sub edge of the mandrel to ensure a distance that when Concreting is filled with concrete so that the mandrel is on its entire circumference is surrounded by concrete. This is for holding the shear force mandrel in the set Concrete necessary.

The lock in the holder on the part to be supported (Stair run) is advantageously carried out over two in Axial direction of the shear force mandrel to each other opposite, essentially in a vertical plane power transmission means acting. So that will achieved a particularly reliable locking.

To be able to release the lock, one can the power transmission means one from the outer surface of the component accessible screw connection. On Screwdriver or wrench is on everyone Construction site in place, so that the release of the lock tion can be done with ordinary tools.

Of course, both power transmission can medium formed by appropriate screw connections his. The screw connections take over each against the receptacle and against the shear force mandrel support, depending on the arrangement, either compressive forces or but tractive forces.  

One way to access such Ver To ensure screw connections is a parallel sleeve-shaped tube extending to the screw axis to be provided by the mate surrounding the receptacle rial of the component runs through. That is, she stretches from the screw-in point on the receptacle to the surface of the component. Through this, therefore the tube can then form a channel be removed.

A force transmission can be used instead of a screw connection means also through a filled container, e.g. B. be formed in the form of a pressure can, its strength transfer function by physical and / or chemical reactions can be overridden, so the arrest cancellation.

In a preferred embodiment, this is fill material a gel that pressures through the walls of the Container passes through, in particular diffuse through dated. The pressure required for this results from the Supporting the stair element on the transverse force mandrel. As the gel comes out of the container relatively is slowly going on, the concrete is in the supporting, the adjacent component fixing the transverse force mandrel long ago hardened before the container exercise of the lock noticeable. The essential Advantage of this embodiment is that the Release of the lock takes place automatically and a otherwise the necessary work step is omitted. It can also not happen that when assembling the stairs is forgotten to open the locking element to lift.  

Instead of providing a gel that over time becomes the container emptied via diffusion, the container can for example also with a ver opening from the outside finally be provided. After opening, this occurs Filling material through this closure to the outside, with what the container then loses its function. As a filling measure In such a case, material comes sand in question, which is well suited to over compressive forces wear, but also slightly out of the open can trickle out of the container. But it would also be one Liquid as filling material possible. Furthermore is it is conceivable that the filling material by other suitable chemical and / or physical processes e.g. B. Phases transitions, solution processes, thermal effects, Electro-viscose processes, vibration excitation etc. is released and the container is no longer under pressure can transmit.

Especially when using a filled container ters can the other power transmission means a counter bearing, in particular made of elastomer. It is but also conceivable for this counter bearing steel or to use similar, because by relieving the burden Power transmission means also the counter bearing Function loses.

Further advantages and features of the invention result from the following description of Ausfüh examples. It shows:

Figure 1 shows a device with a lock from a pressure screw and a counter bearing made of elastomer.

Figure 2 shows a device with a lock of a lag screw and a counter bearing made of elastomer.

Figure 3 shows a device with a lock from a container and a counter bearing made of Elasto mer.

Fig. 4 shows a device with a lock with a lag screw and a counter bearing formed by the elastomer re layer.

Fig. 1 shows a device for the impact sound-absorbing vertical support of a component. This component is, for example, a staircase run 1 which is to be supported on a stair landing 2 . The staircase 1 is a precast concrete element that is prefabricated at the factory. In this production, a sleeve 3 , which acts as a receptacle, is also cast into the concrete and has an elastomer layer 4 on the inside on its upper side.

The sleeve is made of steel, for example. she can but also from polymer concrete, fiber concrete, plastics or other materials.

In this sleeve 3 , a shear force mandrel 5 is used after setting the concrete of the stairwell 1 , which abuts the elastomer layer 4 , the remaining space between the sleeve 3 and the shear force mandrel 5 is filled with insulating material 6 . Through this soft Iso liermaterial 6 is prevented on the one hand that the transverse mandrel 5 and the sleeve 3 come directly in contact with each other, also ensures that concrete flows into the gap between the transverse mandrel 5 and sleeve 3 during later concreting of the adjacent component and possibly forms a rigid sound bridge. At its still free end, the transverse force mandrel 5 has an adjusting screw 7 . The transverse force mandrel 5 can have both a round and a rectangular cross section.

The factory with these essential features vorbe mounted stair run 1 is transported to the construction site, where the stair run 1 is to be aufa Gert on a stair landing 2 . From this stair landing there is initially only one formwork, in the case shown here an element ceiling 8 . However, it is also possible to prefabricate the stair landing and only provide recesses for storing the transverse force mandrels.

The adjusting screw 7 , which is a hexagon screw in Fig. 1, is set so that when lowering the stair 1 with a crane, the undersides 11 and 12 of the element ceiling 8 or the stair 1 merge into one another. The adjusting screw 7 is supported on a base plate 9 .

The dead weight of the staircase 1 tries to turn the transverse force mandrel 5 counterclockwise around the contact point of the adjusting screw 7 . As a result, however, the front edge 13 of the elastomer layer 4 would be squeezed and the elastomer layer could then no longer fulfill its function of impact sound insulation. To prevent this, a lock in the form of a torque support for the transverse force mandrel 5 is attached to the sleeve 3 .

In Fig. 1 this torque-supporting locking is formed by a pressure screw 14 and a counter bearing 15 ge. The counter bearing 15 is made of an elastomeric material and placed on the inside of the sleeve 3 below.

The screw 14 runs through a tube 17 which extends from the top 16 of the flight of stairs to the sleeve 3 acting as a receptacle. The tube 17 prevented that the screw 14 comes into direct contact with concrete in the manufacture of the stair pen barrel 1 and is concreted.

The screw 14 and the counter bearing 15 are spaced from each other in the axial direction of the transverse force mandrel and act in opposite directions as Druckelemen te. This allows a moment to be applied to the transverse force mandrel via the screw, which acts as a support against the above-mentioned inclined position. The transverse force mandrel is locked in this way.

The front 19 of the flight of stairs is then covered with ge suitable joint material 20 and then the stair landing 2 is poured from concrete. This concrete completely encloses the free end of the transverse force mandrel 5 . As soon as this concrete has set and the transverse force mandrel 5 is rigid, the screw 14 can be removed ent. The above-mentioned twisting of the transverse force mandrel 5 is then prevented by the set concrete of the stair landing 2 .

After the screw 14 is removed, the entire contact surface between the staircase and the stair pen pedestal is separated by elastomer or insulating material, so that there is no sound bridge and the two components are separated from each other by impact sound.

The tube 17 is then z. B. closed with a stopper and on the staircase 1 stairs covering 21 is then placed. Finally, the joints between the stair run and the stair landing are still closed by elastic joint material 22 .

The mentioned joint material 20 between the staircase and the stair landing can take on the task in addition to the sound function, also to protect the transverse force mandrel 5 from flames and heat in the event of a fire. However, this is also possible through other design features.

In FIG. 2, instead of a pressure screw acting from above, as in FIG. 1, a tension screw 24 acting downward is provided. This in turn is associated with a Ge counter bearing 23 , which absorbs compressive forces.

Also in the example of FIG. 2, the adjusting screw 7 , which is designed here as an eyebolt, is set so that the stair tread element 1 deposited on the element ceiling 8 via the transverse force mandrel 5 closes at its underside 11 with the underside of the staircase fes 12 without offset . Then the stair post is poured as described above and, after the concrete has set, which then prevents the transverse force mandrel 5 from rotating, the lag screw 24 is unscrewed from the stair run 1 . The transverse force mandrel 5 thus lies on the entire upper surface of the elastomer layer 4 and the counter bearing 23 is relieved of pressure.

The force of the tension screw 24 in the transverse force mandrel 5 is via a mandrel arranged inside the transverse force mandrel 25 , into which the train screw 24 is screwed through a hole in the transverse force mandrel 5 . But it is e.g. B. also possible to ensure the introduction of force into the screw by a thread in or on the mandrel. The supporting forces of the tension screw 24 are introduced into the concrete of the stairwell 1 via a wedge 26 . A good distribution of forces is achieved by the oblique side of this wedge. The resulting tensile force is introduced into the concrete by a reinforcement 30 .

To ensure the introduction of force from the stairs into the transverse force mandrel, an additional reinforcement 27 can be seen before.

In Fig. 3, a container in the form of a pressure can 28 is seen in place of a pressure screw as in Fig. 1. This pressure cell forms together with the Gegenla ger 23 a torque-supporting lock. The pressure can is filled with a gel, for example, and has a wall through which the gel can diffuse outward when pressure is applied. After the stair run element is placed on the stair landing, this pressure is exerted on the pressure can 28 . The diffusion out of the gel contained in the pressure cell is very slow, so that the locking of the transverse force mandrel lasts for a long time and only slowly subsides. Until this state is reached, the concrete of the stair landing 2 has already hardened and thus takes over the anti-rotation of the Querkraftdor nes 5th Even with such a locking of the Dor nes automatically dismantling container a complete acoustic decoupling of the transverse force mandrel is possible again.

Instead of filling the container 28 with gel, it can also be filled with sand, for example, in which case a closure can be opened by pulling a stopper and the sand can then be z. B. trickles into the interior of the transverse mandrel 5 . The container then loses its ability to transmit pressure and the lock is released. In addition, it is possible to dissolve the filling material in the pressure can by a physical and / or chemical process, thereby depriving the container of its ability to transmit pressure.

In Fig. 4 a further possibility for Arre tion of the transverse force mandrel is shown. By a lag screw 29 , the transverse force mandrel 5 is biased in the rear region of the sleeve 3 upwards against the elastomer layer 4 . This destes 2 a, the entire surface of the elastomeric layer reaches 4 occupying load between shear load dowel 5 and the elastomeric layer 4 during the deposition of the flight of stairs 1 to the floor slab 8 of the Treppenpo. This load distribution due to preload is also retained when the concrete of the stair landing 2 is solidified and the transverse force mandrel 5 clamps. Therefore, the lag screw 29 can then be removed without the load distribution between the shear force mandrel 5 and the elastomer layer 4 changed significantly and the load on the elastomer layer thus remains uniform over the entire surface. An inadmissible crushing of the elastomer layer no longer occurs. This also provides an opportunity to achieve a torque support that can be canceled.

Claims (12)

1. Device for impact sound-absorbing vertical From a first component ( 1 ) in particular a precast element, on an adjacent second component ( 2 ) with a receptacle ( 3 ) in one of the construction elements and with a transverse force mandrel ( 5 ), which at one end cooperates with the housing (3) and element with its other end towards the other Bauele (2) projects, being arranged in the bearing region between the receptacle (3) and transverse load mandrel (5) an impact sound insulating elastic layer (4), characterized in that the receptacle (3) is arranged to be supported component (1) and the transverse load mandrel rotationally (5) via a detent (14, 15, 23, 24, 28, 29) substantially with respect to its horizontal transverse axis in the housing (3 ) is held and that the lock can be released. 2. Device according to claim 1, characterized in that the locking means two in the axial direction of the transverse force mandrel spaced apart, substantially opposite in a vertical plane acting force transmission means ( 14 , 15 ; 23 , 24 ; 23 , 28 ). 3. Device according to claim 2, characterized in that at least one of the force transmission means ( 14 , 24 , 29 ), from the outer surface ( 16 , 11 ) of the component ( 1 ) is accessible screw connection. 4. The device according to claim 3, characterized in that the screw ( 14 ) absorbs compressive forces. 5. The device according to claim 3, characterized in that the screw connection ( 24 , 29 ) absorbs tensile forces. 6. The device according to claim 3, characterized in that the accessibility of the screw ( 14 , 24 , 29 ) by a parallel to the screw axis extending de tube ( 17 ) through the receptacle ( 3 ) surrounding material of the component ( 1 ) is guaranteed . 7. The device according to claim 2, characterized in that at least one power transmission means is a filled ter container ( 28 ), the power transmission function can be lifted by physical and / or chemical reactions. 8. The device according to claim 7, characterized, that the container contains a filling material, which under Pressure passes through the walls of the container.   9. The device according to claim 7, characterized, that the container can be opened from the outside Closure can be emptied. 10. The device according to claim 7, characterized, that a means can be introduced into the container or already is included that the container, the filling material or Parts of it dissolve and so the function of the container picks up. 11. The device according to claim 2, characterized in that one of the force transmission means is a counter bearing ( 23 ) in particular made of elastomer. 12. The apparatus according to claim 1, characterized in that the transverse force mandrel at its free end a height adjustment in particular a screw ( 7 ) for the component ( 1 ).