DE20213333U1 - Method for fitting shuttering to underside of steel beams with adjustable hollow clamping profiles to grip the lower flanges of the beams - Google Patents

Abstract

A method for fitting shuttering to the underside of steel beams, e.g. for bridge building, has transverse support beams (3) secured under the main beams (1) using clamping elements (5) which grip the lower flanges of the main beams. The clamping elements are rectangular and hollow. Threaded shafts are fitted through holes in the upper and lower walls of the hollow elements, and through vertical holes through the support beams, and are secured by buts and washers. The inner ends (11) of the clamping elements are closed by end pieces, with the lower edges lipped to rest on the beam flanges. The outer ends of the clamping elements are closed by end walls with extended lower lips (13) to rest on the sloping flanges of the main beams. The shuttering is laid onto the support structure.

Description

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PATENT AND LAWYERS MEINKE, DABRINGHAUS "UND PARTNER GbR

ADMISSIONED AT THE EUROPEAN PATENT AND TRADEMARK OFFICE EUROPEAN PATENT AND TRADEMARK ATTORNEYS*

PATENT ATTORNEYS'

JULIUS MEINKE, dipl-ing. WALTER DABRINGHAUS, dipl-ing. JOCHEN MEINKE, dipl-ing.

LAWYER

13 333.8 ^{THOMAS MEINKE}

ROSA-LUXEMBURG-STRASSE 44141 DORTMUND

TELEPHONE (0231)58 41 90 TELEPHONE (0231) 14 76 70 info@patent-recht.de

PO BOX 10 46 45

44046 DORTMUND, 5. Sept. 2

DRESDNER BANK AG DTMD, Account No. 1 148 047 (bank code 440 800 SO) POSTBANK DORTMUND, Account No. 542 02-463 (bank code 440 100 46)

FILE NO. 2/17274 JM/R

Applicant: CO. Weise GmbH & Co. KG, Deusener Straße 59, 44369 Dortmund

"Device for fastening a support beam of a supporting structure for the formwork of steel composite bridges to a composite beam of the steel composite bridge to be built"

"Device for fastening a support beam of a supporting structure for the formwork of steel composite bridges to a composite beam of the steel composite bridge to be built"

The invention relates to a device for fastening a support of a supporting structure for the formwork of steel composite bridges to a composite support of the steel composite bridge to be constructed.

Bridges are sometimes constructed as so-called steel composite bridges. The building materials steel and concrete take on the appropriate internal forces. The cheaper and lighter concrete is subjected to compression, the steel to tension. One possible construction process is that first composite steel beams (rolled sections, hollow boxes or similar) are placed on support yokes or temporary supports after the abutments and pillars have been concreted, and the cross beams are concreted. The concrete superstructure can basically be made in two ways. A so-called formwork carriage is often used, which is mounted on the composite beams. This formwork carriage carries the formwork. The concreting takes place in sections, and then the formwork carriage is moved to the next section.

If the load on the composite beams caused by a formwork carriage would be too great or if a formwork carriage cannot be used for geometric reasons, so-called beam clamps are used.

devices, i.e. generic devices, are used. A supporting structure, the substructure of which consists of profiled steel beams, for example I-profiles, is mounted to the composite beams over the entire length of the bridge using beam clamping devices. The formwork structure is then built onto the beams of the supporting structure that have been attached in this way and then concreted.

For this purpose, beam clamping devices of this type have already become known, which are designed as rigid clamping elements that rest on the composite beams and are firmly screwed to the underside of the respective suspended beam of the supporting structure. This screwing creates relatively large bending moments in the bolted beams, and geometric changes on site cannot be compensated for. Another disadvantage is that, due to the rigid design of the known clamp, transverse bending occurs in the web plate of the clamp if the bridge has a longitudinal incline. Furthermore, the torsional rigidity of the known clamp and its load-bearing capacity are limited.

From DE 201 16 015 Ul a clamping device for detachably connecting components to supports or for detachably connecting supports is known, which comprises a clamping element on which a force can be exerted and a clamping element which is connected to the clamping element.

has a multi-acting contact element which has a contact surface which can be placed on a support or built-in part, wherein means are provided for connecting the clamping element to the contact element, wherein under the influence of the force by an independent twisting and/or tilting of the contact element relative to the clamping element, the contact element with the contact surface can be placed parallel to the support or the component. However, such a multi-part clamping device with movable contact elements is not suitable for use in steel composite bridges.

The object of the invention is to provide a generic device which has better strength properties and is easier to assemble.

This object is achieved according to the invention with a device of the type described at the outset by a hollow support body which can be placed on a lower horizontal web of the composite beam, which projects beyond the horizontal web of the composite beam at the edge and is provided at least on the underside in the area projecting beyond the horizontal web with an anchor rod with a fastening element which can be screwed on at the end, wherein the anchor rod is dimensioned such that it projects through a vertical bore in the supporting structure beam, wherein the hollow support body is provided on one side with a downwardly projecting support plate for resting on the support

scaffolding is closed.

Such a device is much easier to install because the device can be loosely attached to the scaffold beam with the anchor rod, preferably rotated by 90° compared to its later installation position. The scaffold beam is then hung on a crane and in its correct position under the composite beams. The clamping device is then rotated and the anchor rods are tightened by hand. This pre-tensioning ensures that the load is transferred horizontally by static friction, and the formwork construction can then be mounted on the beams. Since the clamping device is not firmly screwed to the suspended beam, changes in the geometry on site can easily be compensated for by moving the loose clamps during installation. Because the device is designed as a hollow support body, the device has a much higher torsional rigidity than state-of-the-art clamping devices, which reduces deformation during concreting. The clamping device also has a significantly higher load-bearing capacity. The support plate, which protrudes downwards compared to the hollow support body, serves to secure the position of the suspended scaffold beam.

It is particularly preferred that the hollow support body

the device is designed as a rectangular hollow profile. This consists, for example, of a standard structural steel and is preferably hot-dip galvanized after production.

To further improve positional security, it is preferably provided that the support plate has a nose on the underside.

On the other side, which faces the vertical web of the composite beam, the hollow support body is preferably closed with an end plate that rests on the horizontal web of the composite beam. The end plate particularly preferably has a centering strip on the underside that projects beyond the lower edge of the support body.

In order to further simplify the assembly, a further advantageous embodiment provides that the anchor rod completely penetrates the hollow supporting body and is also provided with a further fastening element on the upper side.

Preferably, the hollow support body has at least on the underside a slot-like bore for the anchor rod to pass through, which, depending on the installation conditions, enables the anchor rod to be aligned slightly obliquely to the vertical.

In a particularly preferred embodiment,

that the at least one fastening element of the anchor rod has a fastening nut with a pivotable dome plate. The design of the through holes in the hollow support body for the anchor rod and the use of movable dome plates ensure that inclinations in the longitudinal and transverse directions of the bridge (each up to about 7%) can be absorbed by the anchor rod without bending stress. This is particularly advantageous when bridges are to be built with an existing longitudinal inclination.

The invention is explained in more detail below using the drawing as an example. This shows:

Fig. 1 shows a section of a composite bridge to be constructed with devices according to the invention mounted on the underside,

Fig. 2 is a section along line II-II in Fig. 1,

Fig. 3 is a plan view of a device according to the invention,

Fig. 4 is a side view of a device according to the invention and in

Fig. 5 is a right side view of the device according to Fig. 4.

Steel composite bridges are usually constructed in such a way that first composite steel beams are placed on support yokes or temporary supports after the concreting of abutments and pillars (not shown). Two such steel composite beams, which in the example are designed as I-profiles, are shown in Fig. 1 and designated 1. These steel composite beams 1 extend in the longitudinal direction of the bridge, i.e. transversely to the plane of the drawing sheet. A concrete superstructure is to be constructed on these steel composite beams 1; this superstructure is indicated in Fig. 1 and designated 2.

In order to be able to concrete the superstructure 2, a formwork must first be erected, which is to be fastened by a supporting structure with supporting structure beams 3 to the underside of the already laid composite beams 1 of the bridge to be built. Beam clamping devices 4 according to the invention are used for this purpose, which make it possible to fasten a beam 3 of a supporting structure to a composite beam 1 of the steel composite bridge to be built.

Such a device 4 according to the invention initially has a lower horizontal web 1a of the composite beam

1, which is preferably designed as a rectangular hollow profile. This hollow support body 5 is dimensioned such that in the assembly position (Fig. 1) it projects beyond the horizontal web la of the composite beam 1 at the edge. In this area, preferably in its center, the hollow support body 5 has a cylindrical bore 6 on the top and an elongated bore 7 on the bottom, through which an anchor rod 8 is passed, which is provided with screw-on fastening elements on both ends, which are preferably each formed by a fastening nut 9 and a pivotable dome plate 10.

The hollow support body 5 is closed at the end facing the vertical web of the composite beam 1 in the assembly position with an end plate 11 which rests on the horizontal web la of the composite beam 1 in the assembly position. This end plate 11 has a centering strip 12 on the underside which projects beyond the lower edge of the hollow support body 5 and with which the hollow support body 5 rests on the horizontal web la of the composite beam 1.

At the other end, the hollow support body 5 is closed with a downwardly projecting support plate 13 for resting on the supporting framework girder 3. The support plate 13 is preferably provided with a nose 14 on the underside.

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The length of the anchor rods 8 is dimensioned such that they protrude through vertical bores 15 in the supporting structure girders 3, such that the respective dome plate 10 can be fastened on the underside with nut 9.

The devices 1 are preferably assembled as follows:

The devices 4 are loosely attached to the respective scaffold girder 3 while still on the ground, preferably rotated by 90° compared to their later installation position, by leading the anchor rods through the corresponding holes 15 in the girder 3 and fastening them on the underside by screwing on the spherical plate 10 with nut 9. The respective scaffold girder 3 with the devices 4 loosely attached to it is then hung on a crane and hung in its correct position under the composite girders 1 of the bridge to be built. The devices 4 are then rotated by 90° and the anchor rods 8 of all devices are tightened by hand with, for example, 30 kN. This pre-tensioning ensures that the load is transferred horizontally by static friction. The entire formwork structure can then be mounted on the scaffold girders 3 fastened in this way. The scaffold girders 3 can be seen to be fastened to a composite girder 1 using two devices 4 according to the invention.

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The movable dome plates 10 in conjunction with the elongated hole 7 in the hollow supporting body 5 ensure that inclinations in the longitudinal direction (approx. < 7 %) and transverse direction (approx. < 7 %) of the bridge can be absorbed by the respective anchor rod 8 without bending stress.

Of course, the invention is not limited to the embodiments shown. Other embodiments are possible without departing from the basic idea. The device 4 can of course also have a differently designed hollow support body 5, i.e. this can deviate from a rectangular hollow body. During assembly, a centering device 16 (e.g. made of wood, rubber, etc.) is preferably inserted between the underside of the composite support 1 and the supporting frame support 3.

Claims (8)

1. Device for fastening a support of a supporting structure for the formwork of steel composite bridges to a composite support of the steel composite bridge to be constructed, characterized by a hollow support body ( 5 ) which can be placed on a lower horizontal web ( 1a ) of the composite support ( 1 ), which projects beyond the horizontal web ( 1a ) of the composite support ( 1 ) at the edge and is provided at least on the underside in the area projecting beyond the horizontal web ( 1a ) with an anchor rod ( 8 ) with a fastening element ( 9 , 10 ) which can be screwed on at the end, wherein the anchor rod ( 8 ) is dimensioned such that it projects through a vertical bore ( 15 ) of the supporting structure support ( 3 ), wherein the hollow support body ( 5 ) is closed on one side with a downwardly projecting support plate ( 13 ) for resting on the supporting structure support ( 3 ). 2. Device according to claim 1, characterized in that the supporting hollow body ( 5 ) is designed as a rectangular hollow profile. 3. Device according to claim 1 or 2, characterized in that the support plate ( 13 ) has a nose ( 14 ) on its underside. 4. Device according to claim 2 or 3, characterized in that the hollow support body ( 5 ) is closed on the other side with a closing plate ( 11 ) which rests on the horizontal web ( 1a ) of the composite support ( 1 ). 5. Device according to claim 4, characterized in that the end plate ( 11 ) projects on the underside with a centering strip ( 12 ) beyond the lower edge of the hollow support body ( 5 ). 6. Device according to claim 1 or one of the following, characterized in that the anchor rod ( 8 ) completely penetrates the hollow support body ( 5 ) and is provided on the upper side with a further fastening element ( 9 , 10 ). 7. Device according to claim 6, characterized in that the supporting hollow body ( 5 ) has at least on the underside a slot-like bore ( 7 ) for the passage of the anchor rod ( 8 ). 8. Device according to claim 1 or one of the following, characterized in that the at least one fastening element of the anchor rod ( 8 ) has a fastening nut ( 9 ) with a pivotable dome plate ( 10 ).