DE1434372A1 - Teaching framework for concrete structures - Google Patents

Description

LAWYER DiPl.-IN ^ .- π. ο ^ πνίμπ · jr. W üV '..RT / \ L-i3

U34372

Company Theodor Küppers Baugesellschaft, 42 Oberhausen-

Osterfeld, Hasenstrasse 15

Falsework for concrete structures.

The invention relates to a falsework for concrete structures, consisting of a plurality of lined up and supported steel formwork lattice girders, each consisting of an upper and a lower chord and filler rods arranged between these and supports at both ends are.

To date, two construction methods are known in practice for the production of falsework for concrete structures: In one type of construction, the individual formwork trusses are used composed of small rod-shaped or truss-like individual components, with the required Beam length due to adjustable support pieces will be produced. To increase the load-bearing capacity of solo carriers, these can be screwed on

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ORIGINAL INSPECTED

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slack tension straps are tightened. The support or the support of such carriers must always and in in any case at the ends, as their support system is due to the lower straps and diagonals that are not kink-proof is only stable when supported at the ends.

These formwork supports described above have the advantage that one consists of legs, individual series components can produce or assemble any span, the ratio of the load carried to the dead weight of the carrier is very low, so extremely unfavorable. There are also the connection points the individual components are extremely sensitive and the assembly costs are high ». Furthermore, the complex ones are Individual components are quite expensive despite series production.

In the other previously known construction, lattice girders are made of strung together, parallel-belt lattice-like individual components of about 3 to 6 m in length and about 2.20 m in height screwed together. In this way one forms in the

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909817/0131 ^{BATHROOM 0RiSINÄL}

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Practice parallel-belt truss girders with length increments of 3 m, e.g. lengths of 12 m, 15 m, 18 m. These girders must also always be supported on the end supports, as this is also the case with this type of construction the support system only when supported on the because of the diagonals and lower straps that are not kink-proof Ends is stable.

The ratio of load carried to Eigeng ewioht such support is indeed daily cost less * what günstiger.als in the first described construction, also here are the Mon- \ especially with high labor costs is important. However, the disadvantage of such supports is the fact that intermediate lengths between 12m, 15m, 18m cannot be produced, and accordingly the supports must be spaced at intervals of 12, 15 and 18 m without gradations being possible in between. In practice, however, the spans should not be more than about 1 m apart, because the location of the supports can often only be changed to a limited extent, taking into account the terrain, existing buildings or other obstacles.

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The aim of the present invention is to create a falsework formwork girder which has a "better load-to-weight ratio than the previously known construction methods, in which the manufacturing costs are also lower than those of the previously known formwork girders, in which the assembly costs at the construction site continue to be at the same time are smaller than with the previously known formwork girders and in which finally the spans, ie the distances between the supports, can be arranged in steps of about 1 m.

The invention is initially characterized in that all formwork lattice girders such a falsework the same plague length among each other show that both the upper and the lower chord of each girder are made of the same tensile, -compression- and flexurally rigid, seamless profiles that run continuously over the length of the beam, e.g. wide-flanged I-profiles that is also formed the cross bars statically determined in a known manner with the belts forming support triangles all as diagonals run at the same angle of inclination and made of tensile and pressure-resistant profiles odeT pipes from each other

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share the same cross-section, and that finally all inot points on both the upper and lower chords of the girder at the same distance of about Arranged 2m from each other and used as storage "or" support points are trained.

The practical implementation of the formwork lattice girder proposed according to the invention "brings now with a number of decisive advantages. And you can do that with the help of the new carrier, though they have the same fixed lengths as one another, each - f

Create any span with increments of 1 m each. Thus, the new carrier can be used universally, e.g. also as falsework girders for long bridge-like structures with different spans. The assembly costs of such a falsework ^ with truss girders, which have a plague length among each other are composable compared to the conventional ones Types are of course much lower, as there is no need to assemble the individual beams. The relationship too from the carried load to the carrier's own weight is much cheaper with the new carrier than with all previously known ones, composable types with or without undervoltage. Finally, the manufacturing costs of the Carrier according to the invention because of the simple design and the rational production possible as a result cheap and with the same load capacity and span

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only about 4-0 - 60 $ of the previously known

settable types with or without undervoltage.

A major advantage of the new carrier, * j

whose upper and lower belt are made of the same tensile, compressive j

and rigid, seamless over the length of the beam *

uninterrupted continuous profiles, e.g. wide- I

fluffy I-profiles, formed is jund its slide ";

gonals made up of equal and equal lengths'

There are tensile and compression-resistant profiles, can also be seen in the fact that you have the new carrier as a result of this Training can not only be used in a position in which the top belt also comes to rest on top, rather the carrier can also be rotated 180 ° around its length * Use the axis turned in practice, so that the upper chord that was previously at the top is now lying below as the lower chord is used, so the lower chord is now on top. In this way the new carrier is extremely adaptable.

It is also proposed that all nodes on both the upper and lower chords of the wearer in the the same distance from each other and use appropriate reinforcement as a storage or w. as support points to train.

Thus, the new carrier can be uniform as a result of its Training not only at its two end supports, but moreover - and there will be a significant one

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Advantage of the invention seen - also in each of its Nodes of both the lower and the upper chord are supported in stock. 'This alone makes it possible to the. Beams with four different spans in steps of half a node distance to store. None of the previously known carriers can meet this requirement. And precisely on this point the subject of the invention is particularly distinguished from the previously known ones.

Further, it is proposed that each node of similar upper and lower belt so that one can additionally install a simple Auflagerschuh, which gives the wearer when mounting a solid state and facilitates its Bearing as well as its fastening on the cross beams of the falsework towers.

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It also encourages both the diagonals between the straps of the trusses and the actual ones To support the girder as tubes of the same cross-sectional shape with the advantage of that the same fasteners - couplings or pipe clamps - can be used everywhere when connecting braces must be connected to diagonals or pipe supports.

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In summary, the invention has now succeeded in providing an inexpensive, versatile one To create formwork trusses without loss of load-bearing capacity both in its normal position as well as turned by 180 ° around its longitudinal axis - standing upside down - without further use, the support of the beam both at the end points and at each of its nodes the upper as well as the lower belt is possible. Thus, the invention can be decisive for a rational construction of falsework with a few individual components, namely a single standard beam the length of a plague.

On the accompanying drawing is the new formwork framework in one embodiment on the one hand and reproduced on the other hand in several application examples; namely show «

Pig. 1 an overall representation of the new carrier as an atfesioht,

Pig. 2 one across from the Pig. 1 reduced representation of such a carrier, this only to Nodes of the lower chord is supported,

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lig. 3 one of the pig. 2 corresponding representation, the girder turned by 180 ° around its longitudinal axis and supported only at the junctions of the top chord,

fig * 4 shows another application example of the new carrier, which on the one hand at its end points and on the other hand, is supported in the area of two nodes of the lower chord, and

Fig. 5 finally shows a so-called Gerber support structure on.

In the Sohalungs Faohwerkträger shown in the drawing, the top belt is 10 and 11 denotes the lower chord. Diagonals 12 are arranged between the upper and lower chords, on both of them Ends of the truss supports 13

According to the present invention, both the upper chord 10 and the lower chord 11 are made of the same tensile, Druok-, and flexurally rigid, profiles formed, for example, as wide-flanged I-profiles are. These · profiles are set over the length of the beam Continuing without interruption. The diagonals 12 all run at the same angle of inclination and form within of the belts 10 and 11 known statically

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correct support triangles. The nodes 14 of the upper chord and the junctions 15 of the lower chord are arranged at the same distance from each other. The diagonals 12 among each other are also made The same profiles, e.g. formed from tubes of the same cross-section, so that they are also interconnected are the same.

This new carrier can now be supported on the one hand on its supports 13 _f and on the other hand in the area of the nodes 15 of the lower chord and finally also in the area of the junctions 14 of the upper chord if the carrier is turned 180 ° and its longitudinal axis from its normal position . However, this is only possible because the upper and lower chords are formed from the same tensile, compression and bending-resistant profiles. This possibility of versatile support is available in the]? Ig. 2 to 5 shown. Pig. 4 shows a support in which two girders are supported on the one hand at their end points by the scaffolding tower 16 and on the other hand by pipe supports 17 at the nodes 15 of the lower chord.

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And finally the]? Ig shows. 5 a so-called Gerber support structure, being large Spans that are considerably larger than the beam length are possible. As a Gerber joints here simple wooden beams, wooden yokes or the like. serve · With this support structure according to Fig. 5, the formwork supports are both at the end points and at different nodes of the upper and lower chord supported.

Ee it goes without saying in the context of the invention that the illustrated and described embodiment and the possible applications are only examples for the implementation of the subject matter of the invention. One could also choose the support deviating from the representation, as well as other profiles could also be used for the upper and lower chords as well as for the diagonals.

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Claims (3)

λ% Η34372 Claims: 1. Falsework for concrete structures, consisting of a plurality of lined up and supported steel formwork trusses that ever from an upper and a lower chord and filler bars arranged between these and supports at both ends are formed, characterized in that all formwork trusses of the falsework have the same fixed length, so that both the upper and lower chords (10 and 11) of each girder made of the same tensile, compressive and flexurally stiff, shock-free over the lynge of the girder continuously continuous profiles, e.g. wide-flanged! -profiles, is formed, that the in a known manner with the straps statically defining supporting triangles forming cross bars (12) all with the same gradient angle and consist of the same tensile and pressure-resistant profiles, preferably tubes, and that includes all nodes (14 and 15) both -12- 909817/0131 (434372 on the upper and lower chords of the girder in are arranged the same distance from each other and are designed as bearing or support points. 2. Falsework according to claim 1, characterized in that the filler rods (12) between the belts (10 and 11) on the one hand and the supports (17) of the beam on the other hand as steel pipes of the same type Are formed cross-sectional shape. 3. Falsework according to claim 1, characterized in that that all nodes of the upper chord and the lower chord are designed so that for support the trusses can be screwed on to improve stability during assembly. —13— ORIGINAL 909817/0131