DE2540023A1 - PRE-FABRICATED ELEMENT SYSTEM WITH REINFORCED PRECAST CONCRETE PARTS AND PROCESS FOR JOINING THE INDIVIDUAL PARTS IN THE SYSTEM - Google Patents

Description

PATENT LAWYERS

^ Müller 09orns <L ^ M

MUNICH 22 ■ WIDEN MA YERSTRASSE 49 1 BERLIN-DAHLEM 33 · PODBIELSKIALLEE68

BERLIN: DIPL.-ING. R. MUlLER-BORNER MUNICH: DIP L.-ING. HANS-H. WE Y

26 981

Jacues Ferry
S e η 1 is / France.

Prefabricated component system with iron-reinforced precast concrete parts and a method for joining the individual parts

in the system

The present invention relates to a prefabricated component system with iron-reinforced precast concrete elements _{or the like}

Prefabricated components made of iron-reinforced concrete must be connected to one another in a suitable manner, which is particularly important then, if such parts are to transmit tensile stresses, designed quite difficult. Mostly they are also considerable Quantities of potting compound, such as concrete, are required when pouring the space between two adjacent prefabricated parts shall be·

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BERLIN: TELEPHONE <03O> 8312Ο8Θ MUNICH: TELEPHONE (080) 225580 CABLE: PROPINDUS -TELEX OI 84OS7 CABLE: PROPINDUS -TELEX OS 24 244

The present invention is based on the object Prefabricated component system with iron-reinforced precast concrete elements create, in which tensile connections between adjacent prefabricated parts can be made in a simple manner with a minimum required potting compound.

This object is achieved according to the invention in that the Finished parts at the joints with a ring or hairpin shape curved connecting iron and with to accommodate such connecting iron an abutting prefabricated part are provided certain recesses, and that in each case at least one of the Prefabricated parts at the joint in the direction of the connecting iron is fluted in such a way that in the way between two prefabricated parts formed channel is at least one of the connecting iron to be looped connecting rod inserted and a curable potting compound can be filled.

With such prefabricated components, an advantageous method for joining such parts can be carried out in which, according to the invention, the prefabricated components are put together at the intended joints, at least one connecting rod is inserted into the remaining channel between adjoining prefabricated components and then a hardenable, in the hardened state pressure-resistant casting compound, preferably concrete , is filled _o

In the system according to the invention, the prefabricated components "sewn together" as it were at the joints with the help of the connecting rod, whereby only a minimum of potting compound is required will. In addition, there is a particular advantage that when pouring the still flowable potting compound, there is no effect whatsoever Formwork is required because the channel formed by the groove (s) is closed off laterally at each joint

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is. The potting compound is later only subjected to pressure, is known to be able to absorb the concrete without tools.

With the help of the invention, the most varied types of connections can be made between prefabricated components. So can Cells from prefabricated flat or uneven plates, collecting containers, Self-supporting ceilings and the like are produced or reinforced concrete beams are connected to columns. When joining of the prefabricated components, two different types of procedure can be distinguished, on the one hand "pushing", in which the parts be moved towards each other perpendicular to the abutment surface, and on the other hand, the "pushing", in which the prefabricated components are already touching each other on the abutment surface, are shifted against each other until they assume the correct position. Then the connecting rod is attached in both cases. On that will be discussed in more detail below with reference to the drawing. Show it:

Figo 1 in a detail of two adjoining prefabricated parts in cross section;

Figo 1a shows the arrangement according to Pig. 1 in longitudinal section;

Figo 2 shows an angle connection between two prefabricated parts in Cross-section;

Fig. 3 and 3a in detail formwork devices for production of prefabricated parts according to the type of Figures 1 and 1a;

FIG. H shows a longitudinal section through a prefabricated part according to the type of FIG. La;

Fig. 5 shows a larger section of a connection between two prefabricated parts;

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6 shows a shuttering device for producing a Prefabricated part according to Figure 5 in section;

7 and 8 show sections through a connection between two prefabricated parts with two connecting rods to be wedged;

9 and 10 show, in section, an embodiment with a closed, movable ring as a connecting iron;

11 possible forms of connection with the embodiment according to FIGS. 9 and _10e

FIGS. 12 and 13 show a housing for accommodating connecting rings;

Figo 1A and 15 connections with "double seams;"

The basic principle of the type of connection in the system according to the invention is shown in FIGS. The two prefabricated parts 1 and 2 can be arranged in a straight line, as shown in FIGS. 1 and 2, or form an angle, as shown in FIG. They are moved towards one another until they butt against one another with their intended surfaces. The finished parts are t to the Stoesflächen and 2 vexrsehen with grooves 3, so that formed upon collision of the outer edge between them a channel k "Each prefabricated element contains a number of reinforcing bars 5 'protruding hairpin shape of the groove. 3 These are generally customary aring irons of round cross-section, but flat irons can also be used, the anchoring ends of which can optionally have twisting. The prefabricated elements 1 and 2 are formed so that the above hairpin loop counter 5 _e of adjacent prefabricated components

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are offset from one another, for example by 15 to 20 mm, so that they do not interfere with each other. After they meet, a connecting rod 7 made of conventional reinforcing iron is inserted into the channel formed by the recesses 3 and 4. Then the channel k can be filled with concrete. However, this is not shown in FIGS. 1 and 2.

Such a connection has the following properties

There is a lot of play on the joint surfaces (theoretically 2 mm) low, which makes a boarding of the joint superfluous when pouring the casting compound;

Thanks to certain appropriate tooling equipment that will be described later, the adjustment is very precise in all directions of the loops;

The recesses 6 for the hairpin-shaped loops of the Reinforcing bars 5 have sufficient leeway so that tolerances can be compensated · Ss be here pointed out that these loops are not an obstacle when inserting the connecting rod 7, as they are in the Recesses 6 disappear;

Usually a joint is very small, but also very shallow * Ss is B ^ 3 * (see Fig. 1);

The joint, that is to say the channel k _9, is filled by spraying a ready-to-use mortar of constant quality, which can be filled in well despite its moderate flowability

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litest · Types of mortar old aqueous binders must not contain any organic additives «In some cases slightly expanding types of mortar are used «Resin mortars can only be used in extreme cases«,

These properties lead to the following results:

It can be seen that each pair of loops, together with the connecting rod 7 and the grout, forms a connecting bar. The entirety of these bars forms a seam. The above-mentioned properties also mean that the grout between the two prefabricated components is subjected to pressure and thus receives a mechanical resistance that corresponds to that of the material of the prefabricated components corresponds to the corresponding overall shape, and has the same properties as if the arrangement were cast from one piece. «The same properties of a traditional concrete casting method are available here, so that decades of experience in this technology can be used here with prefabricated parts _o This result can be used can be achieved without formwork, with a low consumption of only about 1 1 mortar per running meter of seam «This process changes the» problem of joining prefabricated parts made of reinforced concrete fundamentally «

The mortar spraying technique corresponds to the well-known rules in this area Surfaces that come into contact «One thus obtains continuous transitions« Bile viscosity of the mortar must not be too high in order to avoid the separation of flowing beads «It it is advantageous to provide corresponding flow channels in the areas, to make sure a good filling with mortar

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is achieved. There are corresponding modifications, depending on the direction of the joint in the room, necessary with thin-bodied mortar it is "in the case of horizontally running joints, if necessary, to stick adhesive tape to the lower surface",

Bs will now verdeno described for casting a prefabricated member according to the type of FIG «1 with reference to FIG · 3, a formwork device, the formwork assembly is with regard to very precisely machined straightness, Vinke Lung and width _o A lagging sheet 8 is according to the shape of the most common property, such as Shown in Fig. 1, shaped.At the level of the loops of the reinforcing iron 5, passages are arranged in cladding sheet, which are laterally adapted very precisely and are three times as wide as the thickness of the reinforcing iron 5 The cavity behind is filled on the one hand by two rings 9 »Which clamp the loop-shaped reinforcing iron 5 between them (several pairs of rings are welded to three longitudinal rods 10, as can be seen from FIG filled in by three guides connected to the formwork gt.

The mandrel 11, which is fixed to the outer surface of the casing sheet, clamps both the forks formed from the rings 9 and the loop-shaped reinforcing irons 5 with great accuracy the forks released, they will also be removed and cleaned "the obtained result shows" k _t is a section in the Hittelachse of the prefabricated part 2 represents · from this figure, are intended for the loops of the left building panel of FIG. 1 recesses 6 can be seen the

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by welded stamps in the interior of the cladding sheet 8 be generated. From this it can be seen that this formwork device has both the great accuracy of the reinforced Precast part as well as a formwork that is very easy to carry out enables «This formwork device is at the same time a teaching for the fixation of the reinforcement bars when pouring the finished parts.

This general principle of the enlarged openings of the cladding sheet, which are filled by the rings of a "fork", in connection with a mandrel, the reinforcement and the fork locked, can also be carried out as follows, as shown in Fig. 3a. With this one Example, the forks have stops that are not shown for the sake of clarity.

A modification of the first type of connection consists in assembling a thick lintel with a support, with a wall or a post, as shown in Fig. 5. To simplify the casing of the head of the lintel 2a, the joint is offset and the fewer numerous loops remain for the left prefabricated part 1 inside the cladding sheet · The principle is the same, however, the cladding equipment differs somewhat from the former, as Fig. 6 shows. It is an insert 12 is provided, which adapts exactly to the arc shape of the loops of the reinforcing rod 5 and has in the region of the grinding grooves _β The stamps, which give the shape of the recesses for the Armierungesohleifen the camber 2a, having a sheath which facilitates the encasing . They also serve as guide elements for the mandrel 11, ie the "fork" lies within and is connected to the casing. The mandrel 11, as mentioned before, ensures the locking of the (dance) as well as a perfect adjustment of the reinforcement and is removed immediately after the concrete has been poured in. The mandrel

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engages more deeply than the aforementioned insert 12, in that it is pressed against the vertical piece of steel Assembly thus covers that not shown in FIG. 5 Wedge connecting ring the connecting rod

The second modification to the aforementioned type consists of joining together thin lintels. The connection of the aforementioned type can be considered sufficient to anchor the longitudinal steel pieces of the lintels. When using prefabricated parts in building practice, however, the connection cannot be loaded before the mortar has hardened sufficiently. The channel h in the joint between the two prefabricated components 1 and 2 is made somewhat larger and the loops of the reinforcing iron 5 protrude further than in the first example create hairpin-shaped loops without coming into contact with the concrete. The rod 7b is made somewhat longer and ensures the overlap with the vertically arranged steel piece 13 of the prefabricated component 1, here a support, Xn Fig enable special sections. These can be clamped with the help of torque locking «First the connecting rods 7a and 7b bend until they are supported on the concrete of the neighboring precast elements Locking is complete when the impact exerted on concrete parts 1 and 2 is balanced out by the pull exerted on the loops. «This purely mechanical wedge connection system is supplemented by filling the joints with mortar. The wedge pieces

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can either be intended for single use though also, be suitable for re-use by following the Clamping can be replaced by simple, solid metal wedges.

The first type of connection can also be used with a T-connection, i.e. where the end face of a wall, a panel _{or the like is} to be attached against the flat side of another, provided that the attachment is by abutting one another in the manner described first β is possible, however, if a third wall standing perpendicular to the others is to be attached between two parallel walls that are set to their final distance, then one must proceed with the aid of the second method, in which the parts are shifted against each other « Type of connection, however, protruding loops of the type shown in FIGS. 1 to 8 are not suitable. For this purpose, a modified type of connection must be used, which is to be explained in more detail below with reference to FIGS. 9 and 10.

The wall 1a, which forms the wing of the T, has recesses 6a. In each of these recesses 6a there is a elliptical ring 5a made of reinforcing iron, the movable one surrounds reinforcing rod 15 parallel to the impact surface. the the other wall 2 has the usual groove 3 on the abutment edge, which in the area of the locking becomes a recess is deepened «The loops of the reinforcing bars 5 are at the wall 2 designed so that they do not protrude beyond the foremost ends of the abutting edge. By the way, this wall is executed exactly as the prefabricated part 2 naoh Fig. 1 · To Execution of the connection between the two parts 1a and must keep the elliptical rings 5a in the retracted position after you have previously assured that they can tilt freely. A thin steel plate is used for this

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(Pig · 10) brought in front of the recesses 6a. Once the wall 2 has been pushed into the right place, one only needs to pull the steel plate 16 _{9 in} order to cause the movable rings 5a to tilt. If you pull the steel plate 16 out upwards, you can check at regular intervals by gently pushing it down whether a ring 5 & that has been released for tilting is tilted downwards or not the "seam ^{11 can be} completed".

In this first type of arrangement of the connecting rings in Recesses 6 in the wall 1a must be known in advance where the other wall is to be attached «If recesses 6a with rings 5a in places where no wall 2 abuts, then the wall la would not have a very pleasing appearance «

A further development of the embodiment according to FIGS. 9 and 10 therefore proposes that the rings 5a be in closed housings to accommodate, which is smoothly sealed with the surface of the wall and only opened when the wall 2 is attached “The housings that are not required can then remain closed, so that the pleasing appearance of wall 1a is retained remains "Possible types of attachment are indicated in Fig. 11" So it should be possible to have no, one or two walls in different places and on different sides To attach wall 1a, so that, as the example of FIG. 11 alone shows, nine different modifications are possible This is explained below with reference to Figures 12 and I3

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12 shows a housing 17 for receiving a movable iron ring 5a intended for the connection, which surrounds a fixed reinforcing rod 15 (FIG. 13). On every potential connection line, such housings 17 are cast into the wall 1a, a prefabricated part. "The housings are made of Waterproof material, compact and a good connection with concrete ₉ compatible with steel and relatively easily breakableThey serve to accommodate a ring 5 & and at the same time the reinforcing rod 15 when poured in the middle between the rear part of the housing 17 and the front surface of the wall 1a to be positioned. The ring 5a and a slotted PVC disc are pushed onto the reinforcing rod 15. The housing 17 is fitted exactly, its slot is sealed with adhesive tape poured in when making wall 1a "

Before attaching the wall 2, which has been pushed into the correct position, the connection point is selected, then in the housing 17 holes are drilled with a drill that are deep around a stop in order to obtain recesses 6a similar to those shown in FIGS. 9 and 10 « For the execution of series of holes, a multi-headed tool with a guide frame is made «Otherwise the process is similar to the first embodiment« A cross attachment is also possible «The recess then opens into the two end faces« The first wall is pushed "in each recess has to the free side of a second loop are inserted, whereupon the connecting rod is introduced _e After having made sure that the remaining free rings can tilt, one comes to the already explained above case back for the second pushed-in position wall _o Xin the example of Fig. 11

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The adjustable wall then offers 16 different connection options at"

It should also be noted that the invention allows tolerances to be achieved that are closer to those that are well made Metal cladding is comparable «For a good seal between the free space and the cladding sheet as well as for careful storage must be provided. Connecting by moving them together is suitable for assembling three T-shaped walls or four cross-shaped walls the same core pieces The two main walls of Fig. 1 are then provided with supplementary recesses on the flat sides attached, whereby the loops of the second walls are longer «

The system that works with wedges is not limited to the assembly of thin plates 14 one can also master larger wall thicknesses. Fig. shows a connection between a column and a ceiling, which is also suitable for ribbed ceilings. The principle remains the same for the prefabrication of the parts: forks, guide elements and mandrel are used, this one also being an inflatable one May be tube, designated in Fig. 15 with 7d.

If special services are required, attempts to break must be made »

To supplement the examples of use already explained, it should be noted that nan produce three-dimensional elements industrially that have reinforced iron soles that are available on the outside, visible or hidden «These cells are then attached at a certain distance from each other and duroh partition walls are added «Especially for buildings vertical technical rooms by superimposing five-sided Cells (open at the top) can be achieved «, The attachment

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the connecting floors take place at each step and precede the attachment of the upper technical rooms.

It is possible to make these connections with a pre- or post-charge to combine,. Parallel to the connection, the The stress only affects the parts to be assembled or the fully connected system. she is best done by the aforementioned wedging. Except for traditional areas of application, the combination offers in the case of an almost vertical direction of stress, a new, inexpensive option to which one proceeds in four phases must ο First, mortar application on part of the length, partial stress, whereby the connected position is compressed will o After completion of the mortar filling, additional load.

With the L-shaped connections (see Fig. 2) it can be cheaper when the wall with the outer edge is attached first. Only the loops are allowed the plane of the inner side do not protrude and the recesses must open into the end faces. For example, if you swap the upper and lower reinforcing bars (Fig. 15) you will see that these Modification is also suitable for a double connection.

A wedging of the annealing iron at the connection points against each other and thus a pressing together of the prefabricated components can also be achieved with the help of a wedge-shaped design of the Connecting rod can be made, as shown in Fig. 15 niit the connecting rod 7 o is illustrated.

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Claims (1)

Expectations ί 1, JFertigbauteilsystem with eieenarmierter precast concrete parts, ^ ~~ * ^ characterized in that the prefabricated parts (i, 1a, 2) at the joints with ring or hairpin-shaped curved connecting iron (5 »5a) and with an abutting to accommodate such connecting iron Recesses (6) specific to the prefabricated part are provided, and that in each case at least one of the prefabricated parts is grooved at the joint in the direction of the connecting iron (5, 5a) in such a way that in the channel (4 ) at least one connecting rod (7,7a-i7b) to be wrapped around by the connecting iron can be inserted and a hardenable potting compound can be filled in « 2. Prefabricated component according to claim 1, characterized in that that the connecting iron (j>) is part of the iron reinforcement of the prefabricated part (i, 1a, 2), which are made at the joints protrude from the surface of the finished part (1,1a, 2) 3 «prefabricated component according to claim 1, characterized in that that the connecting iron is closed, preferably elliptically curved rings (5a) are each attached to the prefabricated parts (la) by means of a reinforcing rod (15) are attached in an indissolubly movable manner « H. That each ring (5) i a recess (6a) in the surface of the finished part (la) ⁿ is attached, prefabricated part according to claim 3 »characterized" 5ο prefabricated component, according to claim k _t, characterized in that each ring (5a) is arranged in a thin-walled housing (17) which is cast into the prefabricated part (la) below the surface and can be broken open if necessary. 6098U / 0837 6. The method Sam joining prefabricated components according to one of claims 1 to 51, characterized in that that the prefabricated components are put together at the intended joints, in the remaining channel between adjoining prefabricated components at least one Connecting rod inserted and then a curable, in the cured state pressure-resistant casting compound, preferably concrete, is poured in « 7 · The method according to claim 6, characterized in that two connecting rods side by side, one each facing one of the prefabricated components, pushed into the channel and wedged against one another. 6098U / 0837