EP2775063A1 - Connection assembly for forming double-shell prefabricated concrete wall elements - Google Patents

Abstract

The arrangement has brace parts (12, 14, 16) arranged at a distance to each other at a carrier (18). End sections of the brace parts extend in different directions of the carrier such that one of the end sections line in an imaginary plane that extends parallel to another imaginary plane, where another end section lies at the latter imaginary plane. The brace parts are made from corrosion-resistant material, and a fastening element (24) extending between the imaginary planes is arranged at the carrier. The brace parts are designed with U-shaped outer contour. Independent claims are also included for the following: (1) a prefabricated concrete part (2) a method for manufacturing a prefabricated concrete part.

Description

Technical area

The present invention relates to a connection arrangement for forming double-shell precast concrete parts, in particular concrete wall elements, such as concrete zero-wall elements. In addition, the invention relates to a corresponding precast concrete part and 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, two concrete shells are connected to one another via lattice girders to form a cavity located between the shells.

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 also professionally compacted after the cavity filling in order to avoid cavities in the core concrete in particular.

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 with comparatively high double-walled 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 double-shelled and hollow double wall is eg in the DE 198 05 571 C2 described.

Another double wall with two spaced concrete slabs is from the DE 199 46 320 A1 known. 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 is also a steel tube as a support bar for the Double wall arranged, each end of the steel tube is provided with a reinforcement.

In addition to the already mentioned bivalve and hollow double walls, there is also 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, essentially monolithic precast concrete element formed from two shells can be produced, wherein both opposing precast concrete or wall surfaces can have the same structure of a shuttering table.

The production of such zero walls with conventional lattice girders as a connection arrangement proves to be extremely 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 must be kept at a defined distance throughout the curing of the second concrete shell.

In terms of production technology, comparatively large-sized switching tables and turning devices, such as a suction cup turning mill, are required for this purpose. Alternative manufacturing methods for the described tilting table production see e.g. Circulating Schaltische in a production environment, which are cast in several processing steps with concrete.

However, production processes in which the first poured concrete part is not turned have the disadvantage that at least one of the surfaces mechanically to form bilaterally smooth surfaces of the precast concrete part must be reworked. This is relatively time consuming and costly.

The present invention is based on the object to provide an improved connection arrangement for forming a clam shell precast concrete, in particular a concrete zero wall, which provides a good connection between two concrete shells or concrete body and which allows efficient, rapid and cost-saving mass production of double 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 of the finished precast concrete part itself, for instance for transport purposes or for on-site installation or construction, shall 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 with 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 designed to form a two-shell precast concrete part, in particular a zero wall or a double wall with spaced concrete shells. The connection arrangement in this case has at least two anchor parts, which are arranged at a distance from one another on a carrier. 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 arranged on the carrier and extending away in two different, in particular opposite directions away from the carrier armature parts, it can be achieved that the connection arrangement can be positioned directly on a support level or on a Schaltisch a formwork arrangement for forming a first concrete body. 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 so far only partially anchored in the first concrete shell formed by the first concrete body. 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 lie 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, the second end portions penetrate or immerse the anchor parts in the fresh concrete and are supported on a support plane of the second formwork arrangement or on a corresponding formwork table.

In this way, the connection arrangement can function not only for connecting two concrete body, but also for maintaining a predetermined distance of the concrete body to each other. The connection arrangement thus has a dual function. It is designed to connect two concrete body, such as two concrete shells together, as well as to hold the two concrete body or concrete shells, in particular during the curing of one of the two concrete body in a predetermined defined distance.

In that regard, the connection assembly can also act as a spacer for the production of double-shell precast concrete, in particular Betonullwänden or concrete double walls, in the latter, the two concrete shells to form a cavity at a predetermined 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, for the anchor parts to 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 carrier is located at least 1/5, 1/4, or 1/3 of the longitudinal extent of the anchor portions away from the first and / or second end portions of the anchor portions.

The anchor parts, in particular their mutually opposite end portions adjoin only selectively to the first and / or the second imaginary plane. This means that the cross-sectional area of the end sections of the anchor parts by means of which they reach the contact plane of a formwork arrangement in the contact position is comparatively 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 in the later precast concrete from the outside not or only barely visible.

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 are conceivable in which the anchor parts are aligned differently and have different lengths. However, it is required in each case 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 corrosion-resistant material. The anchor parts are also in the 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 of importance insofar as the end sections of the anchor parts project up to the outer surface of the precast concrete part. Since the connection arrangement is provided only selectively with comparatively filigree in cross-section designed anchor parts, the material and cost of the use of corrosion-resistant material is limited.

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. In particular, the anchor parts are designed and arranged on the support such that they are in a predetermined orientation, in which the anchor parts, e.g. extend substantially perpendicular to the plateau, can be placed on this stable and tip over.

If the connection arrangement has only two anchor parts, it is advantageous if at least one of the two anchor parts has two free ends or end sections spaced apart from one another in the contact plane, so that the connection arrangement can be positioned tilt-proof on the contact plane according to the principle of a tripod.

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 support itself can be embedded in the first or in a second concrete body in a form-fitting manner, at least in some areas, and accordingly anchored in a form-fitting manner in the concrete.

On the other hand, it can be achieved with that contour of the carrier that the first and / or second end portions of the e.g. are substantially perpendicular 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 spaced 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 that the fastener is connected via the carrier with the anchor parts and also itself and directly anchored in the concrete body, 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 lifted with a hoist and thus lifted out of the first formwork arrangement.

By means of the fastening element, the first concrete body provided with the at least one connection arrangement can also be variably aligned, in particular set up and turned over. 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 hereof, the fastening element in each case has a fastening structure on opposite end sections projecting toward the first and second planes. 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. Into that sleeve may e.g. a fastening bolt provided with a bolt of a hoist are 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 may have at its end portions a closure element, e.g. in the form of a cap or a sealing stopper, which on the one hand prevents the penetration of fresh concrete into the fastening element formed as a sleeve and which on the other hand, for example by a flange-like and radially outward, from the free end of the fastener protruding disc-like configuration can ensure that the Fastening element comes to lie in a recess or recess of the later outer side of the precast concrete part.

Through an approximately disk-like designed sealing plug for the fastener can in the formwork outside of the precast concrete part a recess or recess with a defined diameter and with a essentially flat bottom are formed, which is particularly well suited for receiving tensile or compressive forces of the hoist. The depression or recess formed by the plug of the fastener in the outside of the precast concrete part can be filled after professional installation or final assembly of precast concrete, about to be filled.

By means of the recess or receiving depression formed by the sealing plug, however, it can be achieved, in particular, that the hoisting device can be connected to the fastening element in a contact-free or non-contact configuration with respect to the outer surface. 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 an outer side of the sealing plug facing away from the fastening element comes to rest approximately flush with the first and / or the second end sections of the at least two anchor parts of the connecting arrangement. In that regard, the sealing plug can provide additional support against a riot plane and a tilt-proof positioning of the connection assembly to e.g. support a formwork table.

Furthermore, can be achieved by the design of the sealing plug made of thermoplastic material, the closure plug and with him the entire connection assembly, for example, by area melting of the plastic adhesive or non-positively to connect with the plateau. In that regard, the sealing plug can also be used for fixing the connection arrangement in the xy plane with respect to a formwork arrangement.

According to a further embodiment, the anchor parts on a substantially elongated or at least two legs comprehensive U-shaped outer contour. In the case of a U-shaped outer contour, provision is made in particular for one, for instance the first end section of the anchor part, to have two free ends spaced apart from one another, which correspond to the leg ends of the U-shaped configuration. The opposite end portion, such as the second end portion, may be e.g. have a bow-shaped and accordingly rounded configuration.

The U-shaped configuration is advantageous insofar as that the corresponding anchor part is provided with two legs and thus with two free end portions, by means of which the connection arrangement can be set up tilt-safe even at only two anchor parts on the support level.

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 approximately parallel to the supporting plane extending reinforcing 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 member on the support is further provided that, for example, 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 a merely Having in a plane extending U-shaped bracket section.

The bent, approximately U-shaped and wegerstreckende from one side of the support bracket portion may form a positive connection with the second concrete body already due to its shape, while the free end portions of the leg ends of the U-shaped anchor member preferably corrugated, coiled or serrated or even bent only partially, 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 can have a rod-shaped, either rectilinear or also curved, approximately U-shaped contour, the anchor part itself or the rod forming the anchor part being e.g. is designed as a round rod or as a comparatively thick stainless steel wire. In that regard, in particular, the U-shaped configuration of the anchor part of a hairpin similar.

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.

In a further aspect, a precast concrete element with a first concrete body and with at least one connection arrangement described above is further provided. The at least two anchor parts of the connection arrangement are in this case 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 provided in particular that the connection assembly on a riot plane, which coincides with the formwork table provided for the first concrete body formwork arrangement, erected tilting and already not only positioned by their non-tilt installation in the intended manner, but also aligned are.

The anchor parts may in this case extend substantially perpendicular to the contact surface. It is hereby provided in particular that all embedded in the first concrete body anchor parts of all connection assemblies are on the support level and are supported on this. By the armature parts opposite thereto, namely with their second ends in a second plane extending substantially parallel to the supporting plane, the armature parts can act as spacers, which in particular uniformly or regularly distributed over the surface of the concrete body arranged a comparatively uniform support of the first Concrete body can provide against a second support level, in particular when the first concrete body is positioned in a rotated by 180 ° configuration with the downwardly projecting second end portions of the anchor parts on a provided with fresh concrete 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 can further be provided to provide an insulating layer between the first and the second concrete body.

The insulating layer can be placed on the fresh concrete located in the second formwork arrangement, for example, before the rotated by 180 ° first Concrete body is lowered with the second ends of the anchor parts projecting therefrom ahead of 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 bivalve precast concrete with integrated insulation layer.

According to a further embodiment, the first and second imaginary planes formed by the anchor parts of the connection arrangement coincide with opposite shuttering outer sides of the precast concrete part. 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 contact surface. In other words, the connection arrangement with the first end portions of its at least two or more anchor parts is on the contact surface of the formwork assembly, which typically coincides with the plane of a formwork table in a mass production process.

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, protrude from a surface of the fresh concrete which coincides with a later joining surface of the first concrete body.

Once the fresh concrete in the formwork arrangement has sufficient strength, the at least partially cured first concrete body is turned.

Subsequently, the turned concrete body, which is typically rotated by 180 °, is arranged above or on a second formwork arrangement provided with fresh concrete such that the second end portions of the anchor portions projecting from the first concrete body are supported on a contact surface of the second formwork arrangement. The second formwork arrangement provided with fresh concrete serves in this case for the formation of the second concrete body, which is permanently and non-detachably connected to the first concrete body by means of the connection arrangement, in particular with the anchor parts provided thereon.

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. In this case, provision is made in particular for a plurality of connection arrangements to be distributed approximately uniformly over the surface of the first, and thus of 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 can be similar as the second end portions of the anchor parts protrude from the surface or from the connecting surface of the first concrete body after casting and curing of the first concrete body and are thus raised by means of a cooperating with the fastener hoist from the first formwork assembly.

As already described above, by means of the fastening element integrated in the first concrete body, the first concrete body can not only be raised, but also turned and / or positioned and lowered above or on the second formwork arrangement already provided with fresh concrete such that the second ends of the anchor parts immerse in the fresh concrete of the second formwork arrangement and be supported on the support level 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 an established, rotated about 90 ° to the side orientation of the hoist can then be implemented and connected to about a first end portion of the fastener, so that the already cast first concrete body turned by another 90 °, thus held from above, on the second formwork arrangement can be lowered.

By means of the connection arrangement according to the invention in particular zero-wall precast concrete parts can be made in high quality and smooth on both sides smooth surface, with a surface processing, such as the filling of 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 be noticeably 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. Since the connection arrangements are only occasionally anchored and spaced over the surface of the precast concrete part each spaced in the precast concrete elements, the filling of hollow double walls with in-situ concrete can be simplified and improved quality.

Brief description of the figures

Fig. 1

eine Seitenansicht der erfindungsgemäßen Verbindungsanordnung nach einer ersten Ausgestaltung,

Fig. 2

die Verbindungsanordnung gemäß Fig. 1 von oben betrachtet,

Fig. 3

eine zweite Ausgestaltung der Verbindungsanordnung mit einem Befestigungselement in Seitenansicht,

Fig. 4

die Verbindungsanordnung gemäß Fig. 3 von oben betrachtet,

Fig. 5

eine Seitenansicht der in einer ersten Schalungsanordnung angeordneten Verbindungsanordnung in Seitenansicht,

Fig. 6

entspricht der Konfiguration gemäß Fig, 5, jedoch nach Einfüllen von Frischbeton in die erste Schalungsanordnung,

Fig. 7

zeigt die Verbindung der Verbindungsanordnung mit einem Hebezeug zum Anheben des ersten Betonkörpers,

Fig. 8

zeigt den angehobenen und auf die Seite gewendeten ersten Betonkörper,

Fig. 9

verdeutlicht das Umsetzen des Hebezeugs am Befestigungselement,

Fig. 10

zeigt den um 180° gewendeten ersten Betonkörper während eines Absenkens auf eine zweite, mit Frischbeton versehene Schalungsanordnung und

Fig. 11

zeigt das fertige Betonfertigteil im Querschnitt

Other objects, features and advantageous applications of the invention will be explained in the following description of exemplary embodiments. Hereby show:

Fig. 1

a side view of the connecting arrangement according to the invention according to a first embodiment,

Fig. 2

the connection arrangement according to Fig. 1 viewed from above,

Fig. 3

a second embodiment of the connection arrangement with a fastening element in side view,

Fig. 4

the connection arrangement according to Fig. 3 viewed from above,

Fig. 5

a side view of the arranged in a first formwork arrangement connection arrangement in side view,

Fig. 6

corresponds to the configuration according to Fig. 5 but after filling 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 side first 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 formwork and

Fig. 11

shows the finished precast concrete part in cross section

Detailed description

In FIG. 1 1, the connection arrangement 10 according to a first embodiment is shown in a side view in the xz plane, while FIG FIG. 2 represents the connection assembly 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 first end section 20 shown here below, all the anchor parts 12, 14, 16 on 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 rest 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 is provided that first and two levels 1, 2 coincide with the Schalungsau-βenseiten 102, 104 of the finished precast concrete part 100, as in eg Fig. 11 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, in particular with a first, in the FIGS. 6 to 10 shown concrete body 40 to form a positive connection, or a positive anchoring. Since the opposite end portions 20, 22 of the anchor parts 12, 14, 16 in its final installation position in the precast concrete part 100 on its formwork outer sides 102, 104 protrude or adjacent, the anchor parts 12, 14, 16 made of a corrosion-resistant material, in particular made of stainless steel.

Out FIG. 2 also shows that the carrier 18, with which the anchor parts 12, 14, 16 connected, in particular welded, in the xy plane at least partially curved, corrugated, coiled, jagged or curved contour. 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 18 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, offset both in X-axis. Direction as well as in the Y direction have. In this way, a non-tilting or stable orientation of the connection assembly 10 can be achieved, for example, when this is on a support level 42 one in FIG. 5 schematically shown formwork arrangement 38 is turned off.

In FIG. 2 Furthermore, it is shown that the U-shaped anchor parts 12, 14, 16 are each fastened with one of their two legs 12a, 12b in the region of a bend, or a bent or bent position of the carrier 18. In a welded connection of carrier 18 and anchor part 12, 14, 16, a particularly strong and robust connection can be provided in this way.

Because the connection arrangement 10 has a plurality of armature parts 12, 14, 16, which are aligned parallel to one another and extend away from the support 18 with opposite end sections 20, 22, the connection arrangement 10 can be seen in FIG FIGS. 5 to 7 be positioned and placed on a formwork riot level 42 shown. The individual anchor parts 12, 14, 16, which at the same time act as spacers relative to the second concrete body 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 of according to FIGS. 3 and 4 differs from the one according to the Figures 1 and 2 in that on the support 18 in addition a trained 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. Eg in FIG. 3 Closing element 32 shown has a plate-like adjacent to a screwed into the fastener 24 thread Flange portion 33, the fastening element 24 facing away Au-βenseite typically in the first and / or in the second imaginary plane 1, 2 comes to rest.

In that regard, the closure member 32, the footprint of the connection assembly 10 on the footprint 42 of the formwork assembly 38 magnify. If the closure member 32 is further e.g. is made of a thermoplastic material, it can not only be positioned by heating together with the associated connection assembly 10 at a predetermined position of the support level 42 of the formwork assembly 38 but also fixed accordingly.

Below and in the sequence of FIGS. 5 to 11 Now, the manufacturing process and the manufacturing method for manufacturing the clam-shell precast concrete part using the example of the fastener 24 equipped with the connection assembly 10 is shown.

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.

In FIG. 6 an intermediate step of the manufacturing process is shown after fresh concrete has been introduced into the first formwork arrangement 38 to form a first concrete body 40. As based on FIG. 6 can be seen, in this case, only the first end portions 22, in particular the corrugated trained Leg 12a, 12b of the anchor parts 12, 14, 16 anchored in the first concrete body 40, while the opposite second and bow-shaped end portions 22 of the anchor parts 12, 14, 16 protrude from the overhead connecting surface 41 of the concrete body 40. The same applies here also for the fastening element 24.

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

As from the comparison of FIGS. 7 and 8 it can be seen, by means of the fastener 24 and with the aid of the hoist 46 of the first concrete body 40 can be raised from the first formwork assembly 38 and inclined about 90 ° inclined to a side surface. An additional hoist may then be connected to the first end portion 28 of the fastener 24. For this purpose, too, provision is made for the closure element 32 to be embedded approximately flush with the surface in the formwork outside 102 of the first concrete body 40.

Due to its radially widened flange portion 33, the closure element 32 leaves a correspondingly and correspondingly formed, in FIG. 8 shown depression 106 in the formwork outer side 102 of the first concrete body 40th

In the in FIG. 8 As shown in FIG. 1, the first concrete body 40 may be configured to connect another or the same hoist 46 to the first end portion 28 of the fastener 24 such that the flange 52 projecting radially outwardly from the drawbar 50 receives support from the recess formed on the first concrete body 40 ,

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, as in FIG. 9 is implemented, the first concrete body 40 can be rotated by a further 90 ° and thus in a 180 ° relative to its in FIG. 7 shown pivoted configuration, as shown schematically in FIG FIG. 10 is shown. 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 part 100 and handling of the precast 100 can be used.

The in the FIGS. 10 and 11 only indicated by its contact surface 62 formwork assembly 58 may be formed comparable or identical to the first formwork assembly 38. The filling level of the fresh concrete in the second formwork arrangement 58 corresponds to the formation of a zero wall preferably approximately the length of the protruding from the first concrete body 40 portions of the anchor parts 12, 14, 16. In this way can by lowering of the first concrete body 40 on the second formwork assembly 58 may be formed as a zero wall formed precast element 100, wherein the second end portions 20 of the anchor parts 12, 14, 16 resting on the contact surface 62 of the second formwork arrangement 58 put on.

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 in FIG. 11 sketched finished precast concrete 100, the fastener 24 extends approximately to both opposite formwork outer sides 102, 104. Even after completion of the precast concrete 100, the opposite end portions 28, 30 of the fastener 24 remain accessible, so that the fastener not only for the manufacturing process of the precast concrete part 100, but can also be used equally 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.

The spatial distribution of the connection arrangements in the xy plane can vary greatly according to the strength requirements as well as according to the geometric configurations 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

joint assembly

12

anchor part

14

anchor part

16

anchor part

18

carrier

20

end

22

end

24

fastener

26

attachment structure

28

end

30

end

32

closure element

33

flange

38

A form assemblage

40

concrete body

41

interface

42

standing plane

44

Side wall

46

hoist

48

screw

50

eyelet

52

flange

58

A form assemblage

60

concrete body

62

standing plane

100

Precast concrete

102

Formwork outside

104

Formwork outside

106

recess

Claims (15)

A connection arrangement for forming a two-shell precast concrete part, comprising at least two anchor parts (12, 14, 16) which are arranged at a distance from one another on a support (18), first and second end sections (20, 22) of the anchor parts (12, 14, 16) extend in different directions away from the carrier (18) such that the first end portions (20) of the at least two anchor portions (12, 14, 16) lie in a first imaginary plane (1) substantially parallel to a second imaginary plane (2), in which the second end portions (22) of the at least two anchor parts (12, 14,16) lie. Connecting arrangement according to claim 1, wherein the anchor parts (12, 14, 16) at least partially have a curved, corrugated, jagged or curved contour, by means of which the anchor parts (12, 14, 16) are positively anchored in a first concrete body (40). Connecting arrangement according to one of the preceding claims, wherein the anchor parts (12, 14, 16) are made of a corrosion-resistant material. Connecting arrangement according to one of the preceding claims, which by means of at least two anchor parts (12, 14, 16) is tilt-proof on a with the first or the second plane (1, 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) 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) has a connection structure (26) for forming a releasable connection with a hoist (46). Connecting arrangement according to claim 6, wherein the fastening element (24) at 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). Connecting arrangement according to one of the preceding claims, wherein the anchor parts (12, 14, 16) have a substantially elongated or a two legs (12a, 12b) comprising, U-shaped outer contour. A connector assembly according to any one of the preceding claims 5 to 9, wherein at least one of the anchor members (12, 14, 16) is connected to the carrier (18) inside a curved, corrugated, serrated or bent portion of the carrier (18). Prefabricated concrete part with a first concrete body (40) and with at least one connecting arrangement (10) according to one of the preceding claims, the anchor parts (12, 14; 16) in regions in the first Concrete body (40) are anchored and which partially protrude from a connecting surface (41) of the first concrete body (40) out. Prefabricated concrete element according to claim 11 and with a second concrete body (60) in which the from the connecting surface (41) of the first concrete body (40) projecting out anchor parts (12, 14, 16) are at least partially anchored. Prefabricated concrete part according to one of the preceding claims 11 or 12, wherein the first second imaginary planes (1, 2) of the at least one or more connecting arrangements (10) formed by the anchor parts (12, 14, 16) coincide with opposite outer sides of the prefabricated concrete part (100) , Method for producing a precast concrete part by means of at least one connecting 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 formwork arrangement (38) by means of the at least two anchor parts (12, 14, 16) so that first end sections (20) of the anchor parts (12, 14, 16) support at the support level (42), at least partially filling the first formwork arrangement (38) with fresh concrete to form a first concrete body (40), such that the anchor parts (12, 14, 16) are at least partially anchored in the first concrete body (40) and partially from a connecting surface (41 ) of the first concrete body (40) protrude, Turning the at least partially cured first concrete body (40), - Arranging the turned first concrete body (40) above or on a fresh concrete provided with second formwork arrangement (58) such that second out of the first concrete body (40) protruding end portions (22) of the anchor parts (12, 14, 16) a support plane (62) of the second formwork arrangement (58). 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 a 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).

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