WO2014135182A1

WO2014135182A1 - Connecting arrangement for forming double-shell prefabricated concrete parts

Info

Publication number: WO2014135182A1
Application number: PCT/EP2013/003222
Authority: WO
Inventors: Dieter Rausch
Original assignee: Precon Tech Precast Concrete Technology E.K.
Priority date: 2013-03-05
Filing date: 2013-10-25
Publication date: 2014-09-12
Also published as: EP2775063B1; EP2775063A1; BR112015021490A2

Abstract

The present invention relates to a connecting arrangement for forming a double-shell prefabricated concrete part, having at least two brace parts (12, 14, 16; 112), which are arranged at a distance from one another on a carrier (18). First and second mutually opposing end portions (20, 22) of the brace parts (12, 14, 16; 112) extend in different directions away from the carrier (18) in such a manner that the first end portions (20) of the at least two brace parts (12, 14, 16; 112) lie in a first imaginary plane (1), which extends substantially parallel to a second imaginary plane (2), in which the second end portions (22) of the at least two brace parts (12, 14, 16; 112) lie.

Description

Technical area

The present invention relates to a connection arrangement for the formation of double-shell precast concrete elements, in particular concrete wall elements, such as e.g. of concrete zero wall elements. In addition, the invention relates to a

corresponding precast concrete as well as a method for producing such precast concrete parts.

The use of preconfigured and custom-made precast concrete elements, in particular of reinforced concrete wall elements, is already widespread for the efficient and rapid erection of structures. In particular, so-called double-wall elements are used which have a multi-shell, in particular two-shell construction. Typically, this two concrete shells to form a lying between the shells

Cavity connected via lattice girders.

The lattice girder is in this case embedded in both concrete shells and extends over the space provided between the shells cavity, which is filled at the construction site with ready-mixed or ready-mixed concrete. The in-situ concrete must not only be carefully installed, but following the

Cavity filling are also professionally compacted, in particular to avoid voids in the core concrete.

Comparatively narrow cavities between the concrete shells prove to be critical here, since the supplied concrete may not be introduced evenly under certain circumstances. Especially at a comparatively high level trained double wall elements, this can lead to segregation of the fresh concrete and thus to defects in the core concrete. The lattice girders extending across the cavity prove to be disadvantageous for this purpose.

A bivalve and hollow double wall is e.g. in the

DE 198 05 571 C2 described.

Another double wall with two spaced apart concrete slabs is known from DE 199 46 320 A1. A distance of the two plates is in this case effected by a plurality of zigzag-like stiffeners, which are fastened to the reinforcements of the respective plates. Between the plates, a steel tube is further arranged as a support web for the double wall, wherein each end of the steel tube with a

Reinforcement is provided.

In addition to the already mentioned clam-shelled and hollow

Double walls also has a need for so-called null walls. Here, the two concrete shells are directly connected without interlayer as fully as possible. In terms of manufacturing technology, a first concrete shell is placed on the fresh concrete of a second shell. As a result, it is possible to produce essentially monolithic prefabricated concrete elements formed from two shells, with both opposed prefabricated concrete elements or

Wall surfaces may have the same structure of a shuttering table.

The production of such zero walls with conventional lattice girders as

Connecting arrangement proves to be exceedingly difficult or even impossible, since the lattice girders, in particular their upper chords, a first hardened and rotated by 180 ° concrete shell typically collide with the reinforcement of the second concrete shell. In addition, the first, turned Concrete shell are kept throughout the curing of the second concrete shell at a defined distance.

In terms of production technology, these are comparatively large-sized

Switching and turning devices, such as a Saugschalenwenderoste required. Alternative manufacturing methods described

Tilt table production can be seen e.g. circulating Schaltische in one

Production environment, which are cast in several processing steps with concrete.

However, production methods in which the first cast concrete part is not turned have the disadvantage that at least one of the surfaces must be mechanically reworked to form both sides smooth-surfaced surfaces of the precast concrete part. This is relatively time consuming and costly.

The present invention is based on the object, an improved connection arrangement for forming a clam shell

Prefabricated concrete part, in particular to provide a concrete zero wall, which provides a good connection between two concrete shells or concrete body and which allows an efficient, rapid and cost-saving mass production of two- or multi-shell precast concrete parts.

Furthermore, by means of the connection arrangement, the handling of intermediate products of the precast concrete part as well as the finished

Prefabricated concrete part itself, such as for transport purposes or for the

On-site installation or construction can be simplified.

Invention and advantageous embodiments

This object is achieved with a connection arrangement according to claim 1, with a precast concrete part according to claim 11 and a method for producing such precast concrete parts according to claim 14.

Advantageous embodiments are in each case the subject of dependent claims. The connection arrangement according to the invention is for forming a

two-shell precast concrete part, in particular a zero wall or a

Double wall formed with spaced concrete shells. The connection arrangement has at least two

Anchor parts, which are arranged on a carrier spaced from each other. The anchor parts each have two end portions extending in different directions away from the carrier.

Typically, opposed first and second end portions of the anchor portions are spaced apart from the carrier and extend from different, in particular opposite, outer sides of the carrier in a direction away from the carrier. The at least two anchor parts are in this case arranged on the carrier, the first end sections of the at least two anchor parts lie in a first imaginary plane or span such a first plane. The first imaginary plane extends essentially parallel to a second imaginary plane. In this come opposite, second end portions of the at least two anchor parts to lie.

By means of the spaced apart from each other on the carrier and extending away in two different, in particular opposite directions away from the carrier anchor parts, it can be achieved that the

Connection arrangement directly on a riot level or on a

Schaltisch a formwork arrangement for forming a first concrete body is positionable. In this case, the first imaginary plane can coincide with the plane of the contact area or with the plane of the shift table. It is hereby provided in particular that the anchor parts when concreting a first concrete body enclosed only in some areas of fresh concrete and extent also only partially in the first about from the first

Concrete body formed concrete shell anchored. Opposite second end portions of the anchor parts thus protrude from the overhead surface or connecting surface of the first concrete body.

By those second end portions of the anchor parts come to rest in a second imaginary plane which extends substantially parallel to the first imaginary plane or parallel to Schaltisch, the first provided with the at least two anchor parts concrete shell after curing of the concrete turned by 180 ° be placed on another, filled with fresh concrete formwork arrangement, wherein the second end portions of the anchor parts penetrate or immerse in the fresh concrete and at a contact plane of the second formwork arrangement or on a

support appropriate formwork table.

In this way, the connection arrangement can not only for

Connecting two concrete bodies, but also to comply with a

predetermined distance of the concrete body to each other function. Of the

Connecting arrangement thus comes to a double function. It is designed to connect two concrete bodies, such as two concrete shells, to one another, as well as the two concrete bodies or concrete shells, in particular during the hardening of one of the two concrete bodies in one

to keep predetermined defined distance.

In that regard, the connection assembly can also act as spacers for the production of double-shell precast concrete parts, in particular of Betonnullwänden or concrete double walls, with the latter, the two

Concrete shells forming a cavity in a given

Distance, possibly arranged to form a cavity to each other. The at least two anchor parts can be formed of approximately the same length and be arranged substantially parallel to one another on the carrier. In this case, it is conceivable in particular that the anchor parts extend at an angle of approximately 90 ° to the longitudinal extent of the carrier. The carrier is in this case arranged in particular between opposite end portions of the anchor parts. It may be located approximately midway between the opposite end portions of the anchor parts.

Typically, the support is at least 1/5, 1/4 or 1/3 of the

Longitudinal extension of the anchor parts of the first and / or the second end portion of the anchor parts arranged away.

The anchor parts, in particular their opposite each other

End sections only adjoin the first and / or the second imaginary plane selectively. That is, the cross-sectional area of the end portions of the anchor parts by means of which these with the contact plane of a

Getting shuttering in investment position is relatively small. It is less than 1 cm ² , less than 5 mm ² , less than 3 mm ² or even less than 2 mm ² .

By those at least comparatively filigree configuration of the cross section of the end portions of the anchor parts can be achieved that the

opposite end portions, in particular free ends of the anchor parts, despite investment position with the formwork arrangement are largely completely enclosed by concrete, so that the end portions of the anchor parts are not or only slightly visible from the outside in the future precast concrete part.

The at least two anchor parts of the connection arrangement may, but need not necessarily, be aligned parallel to one another. There are a variety of configurations conceivable in which the anchor parts

are aligned differently with each other and have different lengths. However, it is always required that the opposite End portions of the anchor parts lie in the mutually parallel imaginary first and second planes.

According to a further development, it is further provided that the anchor parts at least partially have a curved, corrugated, coiled, jagged or curved contour, by means of which the anchor parts are positively anchored in a first concrete body. Such an uneven design of the anchor parts serves to fix the anchor parts in the hardened concrete body. Due to a curved, corrugated, coiled, serrated or otherwise arbitrary curved outer contour, the anchor parts are firmly and immediately under the influence of a significant tensile load

Fixed concrete body without a separate attachment of the anchor parts is required with a reinforcement of the concrete body.

According to a further embodiment, the anchor parts are made of a

made of corrosion resistant material. The anchor parts are further in

Connection direction, i. formed pressure stable along the surface normals of the first or second imaginary plane, in particular to bear a load of a first concrete body when it is placed on a provided with fresh concrete formwork arrangement. The anchor parts are preferably designed as a stainless steel anchor, which has sufficient pressure stability and corrosion resistance. The corrosion-resistant embodiment is important insofar as that the end portions of the anchor parts up to the outer surface of the

Precast precast concrete part. Since the connection arrangement is provided only at certain points in cross-section comparatively filigree designed anchor parts, the material and cost required for use

corrosion resistant material within limits. According to a further embodiment, the connection arrangement by means of the at least two anchor parts can be erected or positioned in a tilt-proof manner on a ridge plane coinciding with the first or the second plane. The anchor parts are in particular designed and arranged on the carrier that they can be placed in a predetermined orientation, in which the anchor parts, for example, substantially perpendicular to the support plane, stable and tilt-proof on this.

If the connection arrangement has only two anchor parts, it is advantageous if at least one of the two anchor parts two in the

Aufstandsebene spaced-apart free ends or end portions, so that the connection arrangement is tilt-proof according to the principle of a tripod on the Aufstandsebene positioned. If the connection arrangement has more than two anchor parts, individual anchor parts can also be designed only as anchor rods. For a tilt-proof installation of the connection arrangement on the support level, such as on a Schaltisch a formwork arrangement, it is also advantageous if the carrier has an at least partially curved or kinked outer contour, so that the at least three anchor parts not only in one, but in both, the first or second imaginary plane spanning directions (x, y) are spaced from each other.

According to a further embodiment, the carrier in the direction of the distance of the at least two anchor parts at least partially a curved, corrugated, coiled, jagged or curved contour.

As a result, the carrier itself can be embedded in the first or in a second concrete body in a form-fitting manner, at least in some areas

Accordingly, be anchored positively in the concrete.

On the other hand, can be achieved with that contour of the carrier, that the first and / or second end portions of, for example, substantially perpendicular extending to the longitudinal axis of the carrier extending first and second anchor parts in both directions (x, y) parallel to the first or second plane from each other. In this way, a tilt-proof positioning and placement of the anchor parts can be supported on the footprint of the formwork arrangement.

According to a further embodiment, a fastening element extending between the two imaginary planes is furthermore arranged on the carrier. In the region of at least one end section projecting toward the first or the second plane, this has a connection structure for forming a releasable connection to a hoist. The fastening element can be embedded so far comparable to the anchor parts in the first and in the second concrete body. Its end portion projecting toward the first or second level may either lie directly in the plane or be slightly spaced from the plane. However, the end portion of the fastener does not protrude through that level, but comes to rest within the later concrete body and thus set back relative to the end portions of the anchor parts.

In which the fastener is connected via the carrier with the anchor parts and also also and directly in the concrete body

can be anchored, the fastener can be used to handle the first concrete body and the handling of the entire precast concrete part.

In particular, by means of the fastening element, the first concrete body cast in a first formwork assembly can be replaced by e.g. standardized connection with a hoist raised and thus from the first

Shuttering be lifted out. By means of the fastener can with the at least one

Connection arrangement provided first concrete body also variable

aligned, in particular set up and turned. Furthermore, the fastener can also act after completion of the precast concrete as a means of transport for the precast concrete part.

About the integrated by means of the connection assembly in the precast concrete fastener, the entire precast concrete can be raised with construction site provided hoists, positioned, aligned and lowered on site in the intended orientation. Furthermore, the finished precast concrete part can be fixed and stabilized by means of supports or struts, for example, for transport purposes or even in an end position provided by the customer. According to a further embodiment of this, the fastening element on opposite, protruding to the first and second levels

End portions each have a fastening structure. The fastener may be formed at its opposite end portions substantially identical or symmetrical. By the fastening element extends approximately over the entire space between the two imaginary planes, can learn by means of one and the same fastener, the subsequent precast concrete from both formwork sides of a handling and accordingly both on its underside and on its upper side with suitable lifting equipment to manufacturing , Transport and installation purposes are positioned and aligned.

According to a further embodiment, the fastening element has a sleeve provided with an internal thread. In this sleeve, for example, provided with a bolt fastening anchor of a hoist can be screwed. In this way, a particularly simple and safe and stable connection can be provided with a hoist. For the manufacturing process of the precast concrete part, the fastener at its end portions a closure element, for example in the form of a

Have closure cap or a sealing plug, on the one hand, the penetration of fresh concrete into the sleeve formed as

Fastening element prevented and which on the other hand, for example by a flange-like and radially outward from the free end of the

Fastening element protruding disc-like configuration can ensure that the fastener comes to rest in a recess or recess of the later outside of the precast concrete part.

By an approximately disk-like designed sealing plug for the fastener can be formed in the formwork outside of the precast concrete part a recess or recess with a defined diameter and with a substantially flat bottom, which is particularly well suited for receiving tensile or compressive forces of the hoist. The recess formed by the plug of the fastener or

Recess in the outside of the precast concrete part can be filled after professional installation or final assembly of precast concrete part, about to be filled.

By means of the recess formed by the stopper or

But recording can be achieved in particular that the

Hoist in a non-contact or to the outer surface

non-contact configuration with the fastener is connectable. Damage to the outer surface or formwork side of the precast concrete by the hoist can thus be effectively avoided.

The closure plug can also be made of a thermoplastic material. Furthermore, it is advantageously provided that a the

Fastening element facing away from the outside of the sealing plug in approximately flush with the first and / or the second end portions of the at least two anchor parts of the connection arrangement comes to rest. In that regard, the stopper an additional support against a

Provide riot level and a tilt-proof positioning of

Connection arrangement on e.g. support a formwork table.

Furthermore, can be achieved by the design of the sealing plug made of thermoplastic material, the sealing plug and with it the entire connection assembly as by area wise

Melting of the plastic adhesive or non-positive with the

Join riot level. In that regard, the sealing plug can also for fixing the connection arrangement in the x-y plane with respect to a

Formwork arrangement find use.

According to a further embodiment, the anchor parts on a substantially elongated or at least two legs comprehensive U-shaped outer contour. In a U-shaped outer contour is in particular

provided that one, approximately the first end portion of the anchor member, two spaced apart free ends corresponding to the leg ends of the U-shaped configuration. The opposite end portion, such as the second end portion, may be e.g. a bow-shaped and

accordingly rounded configuration.

The U-shaped configuration is advantageous insofar as that

corresponding anchor part with two legs and thus with two free

End sections is provided by means of which the connection arrangement is already tiltable on the upright level set up even with only two anchor parts.

Furthermore, it can be achieved with the U-shaped configuration that the U-shaped anchor part can be slipped over the reinforcement of the first concrete body collision-free, with the free leg ends facing down towards the first plane. In that regard, an arrangement of the anchor parts is conceivable that any extending approximately parallel to the supporting plane Reinforcement elements, such as in the form of steel rods, come to rest between the legs of the anchor parts.

Furthermore, the approximately bow-shaped second end portion of the U-shaped anchor member can protrude like a tab from the first concrete body. In that regard, that bracket section can also basically be used for lifting and positioning as well as aligning the first concrete body. For the arrangement of a U-shaped anchor part on the support is further provided that the e.g. down, to the first level extending free ends of the two legs have a corrugated or coiled outer contour, while the opposite second end portion of the U-shaped anchor member has a merely extending in a plane U-shaped bracket section. The bent in about U-shaped and wegerstreckende from one side of the carrier bracket section can already due to his

Forming form a positive connection with the second concrete body, while the free end portions of the leg ends of the U-shaped anchor member preferably corrugated, coiled or jagged or even

are partially curved, so that the anchor parts can form a positive connection with the first concrete body here as well.

As an alternative to substantially elongated or U-shaped anchor parts is of course also conceivable, the anchor parts ring-like, Z-shaped or M-shaped or form a triangle.

As already mentioned, the anchor part may have a rod-shaped, either rectilinear or curved, approximately U-shaped contour, wherein the

Anchor part itself or the anchor part forming the rod, for example. is designed as a round rod or as a comparatively thick stainless steel wire. In that regard, can

especially similar to the U-shaped configuration of the anchor part of a hairpin. According to a further embodiment of the connection arrangement, at least one of the anchor parts is connected to the carrier on the inside of a curved, corrugated, coiled, jagged or curved section of the carrier. Thus, the carrier may in particular have individual kinks or bent or bent regions. The arrangement on an inner side of the curved, kinked or otherwise not rectilinear section on the carrier is advantageous in that the anchor part, such as a leg of the U-shaped anchor member is as narrow as possible enclosed or enclosed by the curved or curved contour of the carrier.

In this way, a particularly stable and durable

Connection of anchor part and carrier can be achieved. Typically, the anchor part is welded to the carrier.

According to a further embodiment, at least one of the anchor parts on at least one free end portion to a bend. The bend may e.g. have a curvature of approximately 180 °. It can be provided both for straight or rod-shaped anchor parts as well as for U-shaped anchor parts. In a U-shaped anchor part, the bend is formed in particular at the free end of the two legs of the U-shaped anchor part. The bend may be configured at the free leg ends to the outside, so that the bend of a leg is aligned facing away from the other leg.

But there are also embodiments conceivable in which the bends are formed inwardly. In this case, the bend of a leg facing the other leg. In a modification of this it is further conceivable that the bends also extend outside of the plane formed by the two legs of the U-shaped armature part. It is particularly conceivable that the bends of the two leg ends of the U-shaped anchor member in approximately perpendicular or below a predetermined Extending angles to the plane formed by the legs. The

Bends may be e.g. be aligned diametrically opposite.

By means of the bends an improved mounting of the anchor parts in the fresh concrete and in the hardened concrete can be achieved. In addition, by means of the bends a particularly high dimensional stability of the anchor parts

be brought about. The outer contour or the outer curvature of the

Bends represents insofar a defined and very small bearing or contact surface, if the anchor parts with their bends, for example. be positioned on the inside of a formwork. Any tolerances of the length of the anchor parts or the blanks, from which the anchor parts are formed, in particular bent, can be effectively compensated in this way. The manufacture of the anchor parts, such as by cutting to length of a rod or wire-shaped metal component also leads to unavoidable geometric tolerances of the corresponding separation points. By training a

Bending those coincident with the free ends of the anchor parts separation points any geometric tolerances of the separation points can also be compensated.

Nacn another embodiment of the U-shaped anchor member extending between the legs of the anchor member connecting portion has an inwardly directed towards the free ends of the legs indentation. The indentation is arranged in particular approximately in the middle between the legs. Thus arise two humpback-like bases on the

Outer contour of the connection section. The configuration of the recess in the connecting portion between the legs is for displacing concrete between the connecting portion and a

Connection section facing formwork for the future precast concrete advantage. Grain components of fresh concrete, especially pebbles, can be displaced in this way better and easier.

In a further aspect, a precast concrete element with a first

Concrete body and with at least one previously described

Connection arrangement provided. The at least two anchor parts of

Connecting arrangement here are partially anchored in the first concrete body. It is particularly provided here that e.g. the first

End portions of the at least two anchor parts are anchored in the concrete body, while the second, opposite provided end portions of the

Anchor parts protrude from a connecting surface of the first concrete body. In that regard, the anchor parts protrude in areas out of the concrete body to form a fluid connection with a second concrete body. The precast concrete element may have at least one concrete body made of conventional concrete or lightweight concrete. Lightweight concrete typically has a lower dry bulk density of at most 2000 kg / m ³ . In the present case, the lightweight concrete body can be designed with grain porosities to form a so-called closed structure. Alternatively, the lightweight concrete may be mixed with expanded clay or the like pore-forming, relatively dense aggregates to form a haufwerksporigen structure.

For the production of the first concrete body is in particular provided that the connection arrangement on a support plane, which with the

Shuttering table provided for the first concrete body

Formwork arrangement coincides, erected tipping and already not only by their non-tilting installation in the intended manner

positioned but also aligned. The anchor parts may be substantially perpendicular to the

Extend riot level. In this case, provision is made in particular for all the anchor parts of all connection arrangements, which are embedded in the first concrete body, to stand on the contact surface and to rest against it support. By the anchor parts opposite thereto, namely with their second ends in a second plane extending substantially parallel to the supporting plane, the anchor parts can be used as

Spacers function, in particular evenly or regularly distributed over the surface of the concrete body arranged to provide a comparatively uniform support of the first concrete body against a second contact plane, especially if the first concrete body in a rotated by 180 ° configuration with the downwardly projecting second end portions the anchor parts is positioned on a fresh concrete provided with second formwork arrangement.

According to a further embodiment, the precast concrete part further comprises a second concrete body, in which the anchoring parts projecting from the connecting surface of the first concrete body are anchored at least in some areas. There are different configurations conceivable here. Thus, by means of the connecting arrangements designed as a zero wall two-shell precast concrete part can be made. Here are those portions of the anchor parts, which protrude from the first concrete body, almost completely in the second concrete body to lie.

In other embodiments, such as in the formation of a double wall or cavity wall may be provided that only the second end portion of the anchor parts corresponding to the thickness of the second concrete body penetrate into it, wherein the first and second concrete body remain at a predetermined distance from each other. In this case, it is also possible to provide an insulating layer between the first and the second concrete body

provided.

The insulating layer can be placed on the fresh concrete in the second formwork arrangement, for example, before the first concrete body rotated by 180 °, with the second ends of the anchor parts protruding therefrom, is lowered onto the second formwork arrangement. In that regard, the connection arrangement is equally suitable for the production of zero walls, Double walls as well as for the realization of double-shell precast concrete elements with integrated insulating layer.

According to a further embodiment, the fall of the anchor parts of

Connecting arrangement formed first and second imaginary planes with opposite shuttering outer sides of the precast concrete part together. The construction height of the anchor parts perpendicular to the first or second imaginary plane corresponds to the extent of the wall thickness of the clam shell, the first and the second concrete body having precast concrete part.

According to a further independent aspect, finally, a method for producing a precast concrete part is provided which can be carried out using a connection arrangement described above. The method begins with the positioning of at least one connection arrangement on a contact plane of a first formwork arrangement. In this case, the at least two anchor parts of the connection arrangement are based on their first

End sections at the riot level from. In other words, the connection arrangement is with the first end portions of its at least two or more anchor parts on the contact plane of the formwork arrangement, which is typically with the level of a formwork table in a

Mass production process coincides.

In the formwork arrangement, a reinforcement is also typically provided for the formation of a first concrete body.

In a further step, the first formwork arrangement is at least partially filled with fresh concrete to form a first concrete body. The filling amount is in this case dimensioned such that the anchor parts are at least partially anchored in the first concrete body, but partially, typically with their opposite second end portions, from a surface of the fresh concrete, which with a later

Connecting surface of the first concrete body coincides, sticking out. Once the fresh concrete in the formwork arrangement a

has sufficient strength, the at least partially cured first concrete body is turned.

Subsequently, the turned, typically rotated by 180 °

Concrete body, arranged above or on a provided with fresh concrete second formwork arrangement such that the second, dipping from the projecting from the first concrete body end portions of the anchor parts in the fresh concrete of the second formwork arrangement. In order to produce a zero wall, it may be provided that the first concrete body thereby comes to rest almost completely over the fresh concrete of the second formwork arrangement. The second end portions of the anchor parts can be spaced to a contact patch or inside of the second

Formwork arrangement are arranged. But it is also conceivable that the anchor parts are supported on the contact plane of the second formwork arrangement. The second formwork arrangement provided with fresh concrete here serves to form the second concrete body, which by means of the connection arrangement, in particular with the anchor parts provided thereon, with the first

Concrete body is permanently and permanently connected.

In addition, the connection arrangement, in particular with its first and second anchor parts, provides a spacer by means of which the first concrete body can be held at a predetermined distance from the contact plane of the second formwork arrangement. It is here

In particular, it is provided that a plurality of connection arrangements are arranged approximately uniformly distributed over the surface of the first, thus the second concrete body. In this way, a uniform support and uniform force transmission from the first concrete body into the second formwork arrangement can be provided at least during the curing of the second concrete body. According to a further embodiment, the use of a provided with a fastener connection assembly is further provided for the preparation of the precast concrete part. The connection arrangement, like the second end sections of the anchor parts, can protrude out of the surface or out of the connection surface of the first concrete body after the casting and curing of the first concrete body and thus by means of a connection with the first concrete body

Fastening element cooperating hoist from the first

Shuttering be raised. As already described above, by means of the integrated in the first concrete body fastener of the first concrete body not only raised, but also turned and / or above or on the second, with

Fresh concrete already provided formwork arrangement are positioned and lowered so that the second ends of the anchor parts dip into the fresh concrete of the second formwork arrangement and are supported on the contact plane of the second formwork arrangement.

In this case, it is particularly advantageous if the fastening element has a fastening structure, for example in the form of a screw thread, at its two opposite end sections. Thus, the hoist for lifting and about to turn the first concrete body by 90 ° with a second end portion of the fastener can be temporarily connected.

In a set up, rotated about 90 ° to the side orientation, the hoist can then be implemented and about with a first

End portion of the fastener are connected so that the already cast first concrete body turned by another 90 °, thus held from above, can be lowered to the second formwork arrangement. By means of the connection arrangement according to the invention in particular zero-wall precast concrete parts can be made in high quality and with both sides smooth shuttering surface, with a surface treatment, such as Exception of filling any recesses or recesses in the region of the fastener is no longer required. In that regard, the production capacity of existing production facilities for precast concrete parts can be significantly improved and increased, since the previously required surface finishing processes can be omitted.

The connection arrangements, which are typically regularly distributed over the surface of the precast concrete part and accordingly to be provided selectively, can completely replace previous lattice girders provided for connecting concrete shells for double walls. Because the

Connection arrangements only selectively, and over the surface of the

Precast concrete each spaced apart anchored in precast concrete parts, the filling of hollow double walls can be simplified with in-situ concrete and improved quality.

Brief description of the figures

Other objects, features and advantageous applications of the invention will become apparent in the following description of

Embodiments explained. Hereby show:

1 shows a side view of the connection arrangement according to the invention according to a first embodiment, FIG. 2 shows the connection arrangement according to FIG. 1 viewed from above,

Fig. 3 shows a second embodiment of the connection arrangement with a

Fastener in side view, the connection arrangement of FIG. 3 viewed from above, Fig. 5 is a side view of the in a first formwork arrangement

arranged connection arrangement in side view,

Fig. 6 corresponds to the configuration according to FIG. 5, but after filling of

Fresh concrete in the first formwork arrangement,

Fig. 7 shows the connection of the connection arrangement with a hoist for lifting the first concrete body, Fig. 8 shows the raised and turned to the first side

Concrete body,

Fig. 9 illustrates the implementation of the hoist on the fastener, Fig. 10 shows the 180 ° turned first concrete body during a

Lowering to a second, provided with fresh concrete

Form arrangement,

Fig. 1 1 shows the finished precast concrete in cross-section and

Fig. 12 shows an alternative embodiment of an anchor part.

DETAILED DESCRIPTION In FIG. 1, according to a first embodiment, the connection arrangement 10 is shown in a side view in the xz plane, while FIG. 2 shows the connection arrangement 10 from above in the xy plane. The connecting arrangement 10 has an approximately horizontally extending support 18, on which at least two, in the present embodiment, three anchor parts 12, 14, 16 are arranged. The anchor parts 12, 14, 16 are U-shaped. They have upwardly projecting a second end portion 22 which is bow-shaped. Opposite, at a present shown below The first end portion 20, all armature parts 12, 14, 6, two legs 12A, 12B, which form a first imaginary plane 1 with their free ends. Consequently, all lower, ie first end portions 20 of the three anchor parts 12, 14, 16 lie in a common plane 1.

The same applies to the opposite, second, bow-shaped end portions 22 of the three anchor parts 12, 14, 16. These come to lie in a second, imaginary plane 2, which extends substantially parallel to the first imaginary plane 1. In a later installation position in the precast concrete part, it is provided that first and two levels 1, 2 coincide with the shuttering outer sides 102, 104 of the finished precast concrete part 100, as described e.g. in Fig. 1 1 is clear.

In the present case, the anchor parts 12, 14, 16 have an outer contour resembling a hairpin. In that regard, the first end portions 20 of the anchor parts 12, 14, 16 are formed wavy to form a positive connection, or a positive anchoring in particular with a first, shown in Figures 6 to 10 concrete body 40. Since the opposite end sections 20, 22 of the anchor parts 12, 14, 16 in their final installation position in the precast concrete part 100 protrude or adjoin the formwork outer sides 102, 104, the anchor parts 12, 14, 16 are made of a corrosion-resistant material, in particular of stainless steel.

FIG. 2 also shows that the carrier 18 with which the anchor parts 12, 14, 16 are connected, in particular welded, has a curved, corrugated, serrated, jagged or curved contour that is curved at least in regions in the x-y plane. As a result of this shaping, the carrier 18 itself can undergo a form-fitting anchoring in one of the concrete bodies 40, 60 forming the precast concrete part 100.

On the other hand, it can be achieved by the configuration of the carrier 8 that the anchor parts 12, 14, 16 fastened thereto, relative to the xy plane, which extends substantially parallel to the first or second imaginary plane 1, 2, have an offset both in the X direction and in the Y direction. In this way, a non-tilting or stable orientation of the connection arrangement 10 can be achieved if, for example, it is placed on a support plane 42 of a formwork arrangement 38 shown schematically in FIG.

FIG. 2 further shows that the U-shaped anchor parts 12, 14, 16 are fastened in each case with one of its two limbs 12a, 12b in the region of a bend, in the direction of a bent or bent position of the support 18. In a welded connection of support 18 and anchor part 2, 14, 16, a particularly strong and robust connection can be provided thereby.

By making the connection assembly 10 more, e.g. parallel to each other and with opposite end portions 20, 22 away from the support 18 extending away anchor parts 12, 14, 16, the connection assembly 10 can be positioned in the manner shown in Figures 5 to 7 on a formwork support level 42 and turned off. The individual anchor parts 12, 14, 16, which at the same time act as spacers in relation to the second concrete bodies 60, are thereby already correctly aligned.

The length of the anchor parts 12, 14, 16 in the Z direction ultimately corresponds to the wall thickness of the precast concrete part 100 to be manufactured. The embodiment according to FIGS. 3 and 4 differs from that according to FIGS. 1 and 2 in that the support 18 additionally arranged in the form of a sleeve fastener 24 is arranged. The fastening element 24 is in this case provided with a fastening structure 26 which is formed at least at the opposite first and second end portions 28, 30 of the fastening element 24. The fastening structure 26 can be designed, in particular, as a screw thread which, in the delivery state of the connection arrangement, can be provided with a closure element 32 functioning as a sealing stopper. The closure element 32 shown in FIG. 3, for example, has adjacent to a thread which can be screwed into the fastening element 24 a plate-like flange section 33 whose outside facing away from the fastening element 24 typically lies in the first and / or second imaginary plane 1, 2. In that regard, the closure member 32 can increase the footprint of the connection assembly 10 on the footprint 42 of the formwork assembly 38. Further, if the closure member 32 is made of a thermoplastic, for example, it may be not only positioned but also fixed accordingly by heating together with the connection assembly 10 in communication with it at a predetermined position of the support plane 42 of the formwork assembly 38.

Below and in the sequence of FIGS. 5 to 11, the production process and the production method for producing the bivalve precast concrete part are shown using the example of the connection arrangement 10 equipped with the fastening element 24.

To form a first concrete shell or a first concrete body 40, the connection arrangement 10 is positioned on a support level 42, which coincides with the level of a formwork table, such that the first end portions 20 of the anchor parts 12, 14, 16 and the closure element 32 largely stable and stable stand on the plateau 42 of the formwork arrangement 38. For the manufacture of, for example, a prefabricated concrete element designed as a wall element, a plurality of connecting arrangements 10 distributed over the surface of the later wall element are, of course, to be arranged in or on the formwork arrangement 38 in a corresponding manner. The formwork arrangement 38 furthermore has a circumferential side wall 44. FIG. 6 shows an intermediate step of the production method after fresh concrete has been introduced into the first formwork arrangement 38 to form a first concrete body 40. As can be seen from FIG. 6, only the first end sections 22, in particular the corrugated legs 12a, 12b of the anchor parts 12, 14, 16 are anchored in the first concrete body 40, while the opposite second and bow-shaped end sections 22 of the anchor parts 12, 14, 16 protrude from the overhead bonding surface 41 of the concrete body 40. The same applies here also for the fastening element 24.

After unscrewing the closure element 32 provided on the second end section 30 of the fastening element 34, a hoist 46 provided with a screw 48 merely indicated in FIG. 7 can be connected to the upwardly projecting second end section 30 of the fastening element 24. The hoist 46 is presently equipped with a drawbar eye 50, which is provided with a plate-like mounting or Abstützflansch 52.

As can be seen from the comparison of FIGS. 7 and 8, by means of the fastening element 24 and with the aid of the hoist 46, the first concrete body 40 can be lifted out of the first formwork arrangement 38 and set down at approximately 90 ° on a side surface. An additional hoist may then be connected to the first end portion 28 of the fastener 24. For this purpose, too, it is provided that the closure element 32 embedded in the outside of the formwork outside 102 of the first concrete body 40 approximately flush with the surface.

Because of its radially widened flange section 33, the closure element 32 leaves a recess 106, correspondingly and correspondingly formed therewith, shown in FIG. 8 in the outside of the formwork 102 of the first concrete body 40. In the configuration and orientation of the first concrete body 40 shown in FIG. 8, another or the same hoist 46 may be connected to the first end portion 28 of the fastener 24 such that the flange 52 projecting radially outwardly from the drawbar 50 is supported on the first one Concrete body 40 formed recess experiences.

By means of the recessed into the formwork outside 102 recess 106 any occurring between the hoist 46 and the first concrete body 40 point loads can be reduced. In addition, can be achieved by the recess 106 that the flange 52 of the hoist 46 has no contact with the formwork outer side 102 of the first concrete body 40. Any damage to the formwork outside 102 by the hoist 46 can thereby be effectively avoided. After the hoist 46 has been implemented, as shown in FIG. 9, the first concrete body 40 can be rotated by a further 90 ° and thus converted into a configuration swiveled by 180 ° relative to its starting position shown in FIG. 7, as shown schematically in FIG , In that inverted configuration, the first concrete body 40 can be lowered with the projecting from the now lower joint surface 41 end portions of the anchor members 12, 14, 16 to another, such as a second formwork assembly 58, in which already fresh concrete to form the second concrete body 60th is provided. Previously, the free and protruding from the first concrete body 40 end portion 30 of the fastener 24 may be provided with a geometrically modified closure member 32 'so that no fresh concrete penetrate into the cavity of the fastener 24 and the mounting structure 26 remains intact even after completion of the precast concrete 100 and Handha - Use of the precast 100 can be used. The formwork arrangement 58 indicated in FIGS. 10 and 1 1 merely by its uprising plane 62 can be designed to be comparable or identical to the first formwork arrangement 38. The filling level of the fresh concrete in the second formwork arrangement 58 preferably corresponds approximately to the length of the sections of the anchor parts 12, 14, 16 projecting out of the first concrete body 40 when the zero wall is formed. In this way, lowering the first concrete body 40 in this way On the second formwork arrangement 58, a prefabricated concrete part 100 designed as a zero wall can be formed, with the second end sections 20 of the anchor parts 12, 14, 16 resting on the standing plane 62 of the second formwork arrangement 58.

In that regard, over the surface of the first and the second concrete body 40, 60 arranged distributed connection assemblies 10 at the same time act as spacers for the two concrete body 40, 60th

In the finished prefabricated concrete part 100 sketched in FIG. 11, the fastening element 24 extends approximately to both opposite shuttering outer sides 102, 104. Even after completion of the precast concrete part 100, the opposite end sections 28, 30 of the fastening element 24 remain accessible, so that the fastening element is not only can be used equally for the production process of the precast concrete part 100, but also for its transport and on-site positioning.

Typically, the precast concrete part 100 at least three, four or even more spaced-apart fasteners 24, by means of which the precast concrete part 100 can be positioned and aligned as accurately as possible.

FIG. 12 shows an alternative embodiment of an armature part 12 in side view. The anchor part 1 12, as well as the anchor parts 12, 14, 16 has a substantially U-shaped contour with two approximately parallel extending legs 1 14, 1 16. The free ends 124, 126 of the two legs 1 14, 1 16 are provided with a bend 130. The bend 130 has a bending angle of approximately 180 °. Typically, the bend angle of the bend 130 is more than 90 °, typically more than 120 °. The free end 124, 126, thus a separation point of the extent bent wire or rod material, thus facing upward and is a connecting portion 1 18 between the two legs 1 14, 1 16 faces.

As a result of the bend 130, the free ends 124, 126 of the anchor part 12 each have a defined support point 131, 132. The bend 130 is in the mounting position of the anchor part 1 12 in contact with the inside of a formwork not explicitly shown in Figure 12. The bend 130 results in a tangential and thus well-defined particularly small-area contact position with the formwork. The free end 124, 126 of each leg 1 14, 1 16 is provided with a wavy contour 128. In addition, the bends 130 are offset from the rectilinear upper portions of the legs 1 14, 16 to the outside. The adjacent to the bends 130 leg ends 134, 136, which also have a wavy contour, extend at a predetermined angle to the longitudinal extent of the upper portion of the respective legs 1 14, 1 16. In the embodiment of Figure 12, the leg ends extend approximately below a Angle from 30 ° to 60 ° outwards. The leg end 134 of the leg 1 14 shown on the left in FIG. 12 in this case extends outward, in a direction away from the leg 16. The same also applies to the outwardly projecting leg end 136 of the right leg 16.

By outwardly and oppositely, each obliquely outward with respect to the longitudinal extent of the U-shaped anchor member 1 12 extending leg ends 134, 136 reach the bends 130 in a relation to the legs 1 14, 1 16 outwardly displaced position, so formed by the extent Spreading of the free ends 124, 126 of the legs 1 14, 1 16 ins- Overall, improved anchoring and adhesion in the concrete can be achieved.

Opposite the free ends 124, 126, the anchor part 1 12 has a connecting section 1 18 connecting the two legs 1 14, 1 16 to one another. The connecting portion 1 18 is in this case provided with an inwardly directed, the free ends 124, 126 facing indentation 120. The indentation is located approximately in the middle between the legs 1 14, 16. The indentation ultimately results in two hump-like support points 121, 122 in the transition between the respective legs 1 14, 1 16 in the connecting portion 1 18. Similar to the support points 131, 132 also results in a kind of tangential contact position of the support points 121, 122 on a formwork component. The inwardly projecting indentation 20 enables an improved displacement or tolerance of grain constituents of the fresh concrete, also irrespective of whether the support points 121, 122 of the connecting portion 1 18 come into contact with a shuttering inner side or come to rest at a distance therefrom.

In terms of manufacturing technology for a precast concrete part, it is provided in particular that the anchor part 1 12 shown in FIG. 12 is arranged with its bends 130 on a contact plane of a first formwork arrangement such that that formwork arrangement is at least partially filled with fresh concrete to form a first concrete body. After turning the first concrete body formed in this way, the anchor part 1 12 with the connecting portion 1 18 can dive ahead in a provided with fresh concrete second formwork arrangement. It can be provided in this case that the end sections projecting from the first concrete body or the connecting section 1 18 of the anchor parts 12, 14, 16 or the anchor part 1 12 shown here are supported on a contact surface of the second formwork arrangement or else are inserted in a predetermined position. be far from the riot level. With a spaced arrangement of the anchor parts 12, 14, 16, 112 to the contact plane of the second formwork arrangement, the corresponding end of the respective anchor part 12, 14, 16, 112 is completely surrounded by concrete. In this way, penetration of moisture or other corrosive influences into the precast concrete part can be counteracted.

The spatial distribution of the connection arrangements in the xy plane can vary greatly according to the strength requirements and according to the geometrical embodiments of the precast concrete part. In that regard, the number of connection arrangements to be used is also dependent on the dimensioning and specific configuration of the connection arrangements themselves.

LIST OF REFERENCE NUMBERS

1 level

2 level

10 connection arrangement

12 anchor part

14 anchor part

16 anchor part

18 carriers

20 end section

22 end section

24 fastener

26 attachment structure

28 end section

30 end section

32 closure element

33 flange section

38 formwork arrangement

40 concrete body

41 interface

42 Uprising level

44 side wall

46 hoist

48 screw

50 eyelet

52 flange

58 formwork arrangement

60 concrete body

62 Uprising level

100 precast concrete

102 formwork outside Formwork outside

recess

anchor part

leg

connecting portion

indentation

base

free end

wavy contour

bend

base

leg end

Claims

P a n t a n s p r e c h e

A connection arrangement for forming a two-shell precast concrete element, comprising at least two anchor parts (12, 14, 16; 112) which are arranged spaced from one another on a support (18), first and second end sections (20, 22) of the anchor parts (20, 22) facing one another 12, 14, 16, 112) in different directions extend away from the carrier (18) such that the first end portions (20) of the at least two anchor members (12, 14, 16; 112) lie in a first imaginary plane (1), which extends substantially parallel to a second imaginary plane (2), in which the second end sections (22) of the at least two anchor parts (12, 14, 16, 1 2) are located.

Connecting arrangement according to claim 1, wherein the anchor parts (12, 14, 16; 112) at least in some areas have a curved, corrugated, serrated or curved contour, by means of which the anchor parts (12, 14, 16; 112) are positively locked in a first concrete body (40 )

can be anchored.

Connecting arrangement according to one of the preceding claims, wherein the anchor parts (12, 14, 16, 112) are made of a corrosion-resistant material.

Connecting arrangement according to one of the preceding claims, which by means of the at least two anchor parts (12, 14, 16; 112) is tilt-proof on a with the first or the second plane (, 2) coincident Aufstandsebene (42) erectable.

Connecting arrangement according to one of the preceding claims, wherein the carrier (18) in the direction of the distance of the at least two Anchor parts (12, 14, 16, 112) at least partially has a curved, corrugated, jagged or curved contour.

Connecting arrangement according to one of the preceding claims, wherein a fastening element (24) extending between the two imaginary planes (1, 2) is arranged on the support (18), which in the region of at least one, the first or the second plane (1, 2) projecting end portion (28, 30) a

Connecting structure (26) for forming a detachable connection with a hoist (46).

Connecting arrangement according to claim 6, wherein the

Fastening element (24) on opposite, to the first and second level (1, 2) protruding end portions (28, 30) each having a fastening structure (26).

Connecting arrangement according to one of the preceding claims, wherein the fastening element (24) has a sleeve provided with an internal thread (26).

A connector assembly according to any one of the preceding claims, wherein the anchor members (12, 14, 16, 112) are substantially one

elongated or two legs (12a, 12b, 114, 16)

have comprehensive, U-shaped outer contour.

Connecting arrangement according to one of the preceding claims 5 to 9, wherein at least one of the anchor parts (12, 14, 16; 112)

inside a curved, corrugated, serrated or bent portion of the carrier (18) is connected to the carrier (18). Connecting arrangement according to one of the preceding claims, wherein at least one of the anchor parts (112) at at least one free end portion (124, 126) has a bend (130).

A connector assembly according to any one of the preceding claims 9 to 11, wherein at least one of the anchor members (112) extends inwardly in a linkage portion (118) extending between the legs (114, 116) of the anchor member (112) to the free ends (124, 124). 126) of the legs (114, 116) directed indentation (120).

Prefabricated concrete part with a first concrete body (40) and with at least one connection arrangement (10) according to one of the preceding claims, whose anchor parts (12, 14; 16; 112) are anchored in certain areas in the first concrete body (40) and which partially from a connecting surface (41 ) of the first concrete body (40) protrude.

Prefabricated concrete part according to claim 11 and with a second concrete body (60) in which the anchor parts (12, 14, 16; 12) projecting out of the connecting surface (41) of the first concrete body (40) are anchored at least in some areas.

Prefabricated concrete element according to one of the preceding claims 11 or 12, wherein the first second imaginary planes (1, 2) formed by the anchor parts (12, 14, 16, 112) of the at least one connecting arrangement (10) are opposite

Formwork outer sides of the precast concrete part (100) coincide.

16. A method for producing a precast concrete part by means of at least one connection arrangement (10) according to one of the preceding

Claims 1 to 10, with the steps: Positioning the at least one connection arrangement (10) on a support plane (42) of a first one

Formwork arrangement (38) by means of at least two

Anchoring parts (12, 14, 16, 112), so that first end portions (20) of the anchor parts (12, 14, 16, 112) are supported on the support plane (42), at least partially filling the first

Formwork arrangement (38) with fresh concrete for forming a first concrete body (40), such that the anchor parts (12, 14, 16, 112) are at least partially anchored in the first concrete body (40) and partially from a

Sticking out connecting surface (41) of the first concrete body (40),

Turning the at least partially cured first

Concrete body (40),

Arranging the turned first concrete body (40) above or on a second formwork arrangement (58) provided with fresh concrete in such a way that second end sections (22) of the anchor parts (12, 14, 16; 112) projecting out of the first concrete body (40) immerse the fresh concrete of the second formwork arrangement.

A method according to claim 14 for producing a precast concrete part by means of at least one connecting arrangement (10) according to one of the preceding claims 6 to 10, wherein at least the first concrete body (40) by means of one with the fastening element (24) cooperating lifting device (46) from the first

Formwork arrangement (38) is raised, turned over and / or positioned above or on the second formwork arrangement (58).