EP2466008A2 - Device for anchoring a second concrete component to a first concrete component, in particular a parapet on the superstructure of a bridge - Google Patents

Abstract

The device comprises an anchor bolt (10) which is provided for installation in a concrete component (1). A mold element (20) is provided for installation in another concrete component, where the anchor bolt is passed through an opening in the mold element. The opening is provided as an elongated hole (29) in the mold element, so that the mold element receives the shift between the two concrete components that are moved relative to the anchor bolt.

Description

The invention relates to a device for anchoring a second concrete component to a first concrete component according to the preamble of claim 1. In particular, the invention relates to a device for anchoring a second concrete component on a first concrete component, preferably a cap on an engineering structure, with an anchor bolt head ( Head nut, in particular top plate), which is intended to be installed in the two concrete components, and a molded element with sliding plate, which is intended for installation in the second concrete component, wherein the anchor bolt anchored head through an opening in the mold element and the sliding plate in the first concrete component becomes. Preferably, in the form of a sealing element sealing element for permanent sealing of the penetration of the bridge seal can be arranged.

To anchor a concrete cap on the superstructure of a bridge structure so-called plate anchors are known. These plate anchors exist in a rigid and movable design and have flanges to seal the penetration of the bridge seal by means of contact pressure. Both flanges are connected in different ways, displaceable or non-displaceable, non-positively connected and anchored respectively in the first concrete component or in the second concrete component.

Embodiments of plate anchors are for example from the DE 201 01 365 U1 and the DE 20 2007 017 356 U1 known. The plate anchors described there have an anchor bolt, which extends into both concrete components, and at least one plate-shaped form element, which is penetrated by the anchor bolt. The dish-shaped form element is pressed by means of a cap bolt arranged on the head nut to the adjacent concrete component, whereby a sealing function is realized.

Another plate anchor is from the EP 2 042 657 A1 known. There it is described not to anchor the anchor bolt on its upper side directly into the concrete. Rather, according to the EP 2 042 657 A1 the anchor bolt between its upper end and the plate-shaped Form element, which in the EP 2 042 657 A1 Moving bearing is called, surrounded by a deformable body. The deformability is intended to prevent damage to the anchor by horizontal forces. Such horizontal forces can occur, for example, during shrinkage of the freshly poured concrete or due to thermal contraction. However, the plate anchor is the EP 2 042 657 A1 comparatively complex.

The object of the invention is to provide a device for anchoring two concrete components, which ensures a reliable, smooth displacement of the second concrete component on the first concrete component, the function of the bridge seal in the occurrence of a displacement of the concrete components to each other does not affect a particular large bridges occurring particularly large Displacement of the concrete components allows each other constraint-free and for new construction and renovation of engineering structures, especially bridges, is suitable. Furthermore, the device should be particularly easy to handle and inexpensive to manufacture.

The object is achieved according to the invention by a device having the features of claim 1. Preferred embodiments are given in the dependent claims.

A basic idea of the invention can be seen in that the opening in the mold element is designed such that the mold element can completely compensate for the displacements occurring between the concrete components, in particular horizontal displacements, and thus the anchor bolt exclusively axial tensile forces from the second concrete component in the first concrete component transfers. Accordingly, it is provided that the opening in the form of element, in particular in the sliding part, a slot, so that the mold element for receiving displacements, in particular horizontal displacements between the two concrete components relative to the anchor bolt displaceable, in particular horizontally displaceable.

According to the invention thus the mold element and the anchor bolt in a direction perpendicular to the longitudinal axis of the anchor bolt direction, that is usually in the horizontal direction, executed to each other displaced. This mobility has consequences for the design of the overall device. Because according to the invention, the mold element can accommodate horizontal movements, the mold element according to the invention not only the sealing function, which was ensured by the flange according to the prior art, but also the functionality of the deformable body EP 2 042 657 A1 take. According to the invention, therefore, a single mold element alone the tasks perceive, for the according EP 2 042 657 A1 two different elements were required, namely the plate-shaped movable bearing for sealing on the one hand and the deformation body for receiving horizontal displacements on the other hand. Since thus according to the invention, a smaller number of functional elements is required, the inventive device is particularly easy to use and low in manufacturing and assembly, at the same time a particularly high reliability in terms of horizontal displacements is given.

Due to the configuration according to the invention, the form element can fulfill the following functions with a preferably oval slot: creation of a cavity for constraint-free displacement of the second concrete component on the first concrete component in the longitudinal direction of the bridge and perpendicular thereto, receiving and protecting the sealing area of the sealing disc with sealing compound for a permanent seal the first concrete component, sealing function against penetrating concrete in the cavity of the formula element and fixing and alignment function for the sliding plate and the anchor bolt with head nut. According to the invention, there is the possibility of a variable anchoring depth of the anchor bolt in the second concrete component, wherein in the condition of use an exclusively axial tensile load is ensured in the anchor bolt. Advantageously, the device according to the invention, in contrast to the known devices waive flanges for sealing and deformation body to ensure the displaceability. Instead, the sealing of the penetration of the sealing element by the anchor bolt can not be ensured by means of contact pressure, but on the basis of adhesion.

Furthermore, in contrast to previous devices (12-15 mm), the device according to the invention can enable a displacement of the second component on the first component of up to 25 mm, which extends the range of applications for jointless bridge caps to a total length of 1000 m.

In particular, the first concrete component may be the superstructure of a bridge and the second concrete component may be a cap. To install the anchor bolt in the first concrete component of the anchor bolt can be embedded in concrete, or it can be provided to provide a hole in the hardened concrete, in which the anchor bolt is anchored as a dowel. Alternatively it can be provided to anchor a threaded sleeve for the anchor bolt in the first concrete component as a dowel or einzubetonieren, then to screw the anchor bolt with the threaded sleeve. For installation of the element in the second concrete element element this is preferably embedded in concrete.

It is particularly preferred that the molding element has a cavity. Thus, a space is created by the mold element through which the anchor bolt is guided. On the one hand, a hollow molding element provides a large contact surface with the second concrete component with a low material expenditure, so that a particularly good bond between the molding element and the second concrete component is provided. On the other hand, this embodiment of the formula element ensures that after the concrete element has been cast in around the anchor bolt, there remains a cavity which assists the relative movement between the second concrete component and the anchor bolt made possible by the slot. In particular, it can be provided that the wall of the molding element is thin compared to the dimensions of the cavity, preferably viewed in the horizontal direction.

In particular, with regard to the stability, it may additionally or alternatively be advantageous that the mold element has a planar edge region for abutment with the first concrete component. In addition, such a configuration ensures a particularly good sealing effect with respect to the first concrete component, in particular with respect to a sealing element arranged thereon. Conveniently, the mold element has an opening to the cavity, which is surrounded by the planar edge region.

A further advantageous embodiment of the invention is that the molding element is formed in several parts with a, preferably plate-shaped, sliding part and a foot part, wherein the slot is arranged in the sliding part. Due to the multi-part design a particularly simple production, especially in complex geometries, possible. At the preferably hollow foot part, the planar edge region is expediently arranged for abutment with the first concrete component. Furthermore, it can be provided that the shaped element, in particular the foot part, has an injection opening. This injection port can serve the injection of sealant and is closed before concreting.

The sliding part according to the invention, in addition to the anchor rod with top plate, be an essential part in the transmission of tensile forces from the second concrete component in the first concrete component.

Moreover, it is preferred that the sliding part is made of metal and / or that the foot part is made of plastic. As a result, a particularly good power consumption is achieved at very low material costs. The head nut, which may be designed in particular as a head plate, may also be made of metal. Optionally, the sliding part, the top plate and / or the foot part may also be coated with another material. For example, the head nut on its sliding plate and / or the sliding plate be coated on its side facing the head nut with a friction-reducing layer, in particular Teflon. The sliding part can also be made of other materials. It must be able to transmit the forces from the anchor head into the second component, be dimensionally stable and have a flat, smooth surface as possible. The foot part can also be made from all kinds of dimensionally stable materials. However, it must be able to absorb the concrete pressure during concreting of the second component.

According to a further expedient embodiment it can be provided that the foot part has at least one projection which projects into the slot in the sliding part. In this way, a form-fitting connection between the foot part and the sliding part can be produced, which allows a particularly simple assembly. Suitably, a plurality of such projections are provided.

Furthermore, it is particularly expedient that the shaped element is formed in cross-section and / or in longitudinal section at least partially mushroom-shaped with a shank region and a widened region. The shank region and the widened region are suitably formed at least in regions on the foot part. The broadening of the formula element, which can also be referred to as a thrust foot, in the lower area assists the fitter to align the entire anchor, in particular the slide plate and / or the top plate, parallel to the surface of the first concrete component. This can be particularly reliably prevented that the thrust foot tilts before the anchor is completely installed. In addition, a particularly good force transmission between the second concrete component and the form element can be made possible by a mushroom-shaped configuration. The opening and / or the planar edge region of the molding element, which are intended to bear against the first concrete component, are expediently provided in the widened region. The slot and / or the sliding part are suitably provided on the shaft area.

A further advantageous development of the invention is that a cap for covering, for example, rectangular, elongated hole in the slide and the head nut, in particular the top plate, is provided. By means of such a cap can be prevented in a particularly reliable manner that when Einbetonieren the formula element liquid concrete reaches the slot, where it could potentially affect the function of the slot. In particular, with regard to the cost of materials, the cap may comprise a plastic material.

It is particularly expedient that the cap is fixed by means of a snap connection on the mold element. As a result, the assembly is further simplified.

Furthermore, it can be provided that the cap has at least one rib for fixing and / or aligning the head nut. In this way it can be ensured that the head nut, for example, does not inadvertently loosen during assembly, so that the reliability is increased even further. Suitably, a plurality of such ribs are provided.

Moreover, it is advantageous that the shaped element has at least one rib, in particular four ribs, for, preferably centric, fixing of the anchor bolt during assembly. This at least one rib is expediently arranged in the shaft region of the formula element.

Furthermore, it is preferred that the shaped element has at least one removable extension body, which can be arranged in particular between the plate-shaped sliding part and the foot part. By adding or removing such expansion bodies on or from the foot part, the height of the element and thus the anchoring depth can be varied. The expansion body is expediently designed in the shape of a frame and / or with a cavity for passing the anchor bolt. For example, the expansion body can be positively positioned on the foot part, and the plate-shaped sliding part can in turn be positively positioned on the expansion body. If a plurality of expansion bodies are provided, these can also be positioned positively relative to each other.

According to the invention, the mold element preferably rests on the bridge seal only by its own weight, including the weight of the sliding part and the head nut. The form element serves as a lost formwork to create a free space that allows the displacement. At the same time it carries the sliding part and in the case of installation, the head nut and the anchor rod until it is anchored in the first concrete component, and also serves to align the overall construction.

According to the invention, the seal must not be made by contact pressure, but by adhesion or sealing compounds in conjunction with sealing washers. According to the invention, a strict separation of the function "sealing" from the function "shifting" can be realized.

The invention also encompasses a construction with a first concrete component, a second concrete component and a device according to the invention, wherein the anchor bolt is anchored in the first concrete component, in particular dowelled or concreted in, and the molding element is installed in the second concrete component, in particular cast.

Figur 1:

eine Querschnittsansicht einer ersten Ausführungsform der Erfindung;

Figur 2:

eine Draufsicht auf das Gleitteil mit dem Langloch der Ausführungsform der Figur 1;

Figur 3:

eine Seitenansicht einer zweiten Ausführungsform der Erfindung, wobei der Ankerbolzen der Übersichtlichkeit halber nicht dargestellt ist;

Figur 4:

die Ausführungsform aus Figur 3 im Längsschnitt (Blickrichtung wie in Figur 3), wobei der Ankerbolzen der Übersichtlichkeit halber nicht dargestellt ist;

Figur 5:

die Ausführungsform aus Figur 3 von vorne, wobei der Ankerbolzen der Übersichtlichkeit halber nicht dargestellt ist;

Figur 6:

die Ausführungsform aus Figur 3 im Querschnitt (Blickrichtung wie in Figur 5), wobei der Ankerbolzen der Übersichtlichkeit halber nicht dargestellt ist;

Figur 7:

eine Draufsicht auf das Gleitteil mit dem Langloch der Ausführungsform der Figur 3; und

Figur 8:

eine Längsschnittansicht einer dritten Ausführungsform der Erfindung, wobei der Ankerbolzen der Übersichtlichkeit halber nicht dargestellt ist.

The invention will be explained in more detail below with reference to preferred embodiments, which are shown schematically in the accompanying figures. In the figures show:

FIG. 1:

a cross-sectional view of a first embodiment of the invention;

FIG. 2:

a plan view of the sliding member with the slot of the embodiment of FIG. 1 ;

FIG. 3:

a side view of a second embodiment of the invention, wherein the anchor bolt is not shown for clarity;

FIG. 4:

the embodiment of FIG. 3 in longitudinal section (view as in FIG. 3 ), wherein the anchor bolt is not shown for clarity;

FIG. 5:

the embodiment of FIG. 3 from the front, the anchor bolt is not shown for clarity;

FIG. 6:

the embodiment of FIG. 3 in cross-section (viewing direction as in FIG. 5 ), wherein the anchor bolt is not shown for clarity;

FIG. 7:

a plan view of the sliding member with the slot of the embodiment of FIG. 3 ; and

FIG. 8:

a longitudinal sectional view of a third embodiment of the invention, wherein the anchor bolt is not shown for clarity.

Like-acting elements are identified in the figures with the same reference numerals.

An inventive construction with a first embodiment of an inventive device is in the Figures 1 and 2 shown. The building construction has a lower first concrete component 1 and a second concrete component lying above it 2, wherein the concrete components 1 and 2 are connected by means of an inventive device. Between the two concrete components 1 and 2, a layer-shaped sealing element 5 is arranged. The sealing element 5 may in particular be a bridge seal, which preferably does not have to be attributed to the device according to the invention.

The device has an anchor bolt 10 which is anchored in the first concrete component 1, for example cast in or dowelled, and which projects through the sealing element 5 into the region of the second concrete component 2. The device further comprises a molding element 20 which is cast in the second concrete component 2. Inside the molding element 20 there is an air-filled cavity 26. The molding element 20 has an opening towards the cavity 26, wherein the opening is surrounded by a planar edge region 21. At this planar edge region 21, the mold element 20 rests on the sealing element 5.

The mold element 20 is formed in two parts and has a metallic, plate-shaped sliding part 22 and a foot part 23 made of plastic. The sliding part 22 is arranged in the upper area of the molding element 20. The planar edge region 21 is located on the foot part 23.

In particular Fig. 2 shows, the sliding part 22 of the molding element 20 has a slot 29 formed as an opening. As Fig. 1 shows is passed through this slot 29 of the anchor bolt 10. At its end facing away from the first concrete component 1, the anchor bolt 10 has an external thread 14. On this external thread 14, a head nut 12 is screwed, which may for example have a rectangular peripheral shape, and then may also be referred to as a head plate. Advantageously, the head nut 12 has an internal thread which is provided with a coating for securing the screw. The head nut 12 bears against the sliding part 22 of the element 20.

Thus, according to the invention, there is a connection between the anchor bolt 10 installed in the first concrete component 1 and the molded element 20 cast in the second concrete component 2, since the opening provided in the form member 20 for the anchor bolt 10 is formed as a slot 29, this connection permits a horizontal movement the element 20 relative to the anchor bolt 10, so that the device a horizontal movement of the second concrete component 2 relative to the first concrete component 1, as may occur, for example, in a shrinkage of the concrete or due to thermal contraction, can be added. The mold element 20 is at the same time by means of the head nut 12 on the sealing element 5, so that at the planar edge portion 21 of the mold element 20 a sealing area is formed, which seals the cavity 26 and thus the anchor bolt 10 located therein relative to the environment. Additionally or alternatively, the planar edge region 21 may be provided with a suitable sealing construction, for example a sealing lip made of flexible plastic or a foam seal to compensate for any unevenness. According to the invention, the mold element thus has a double function, in which it serves on the one hand for receiving horizontal movements and on the other hand has a sealing function.

The inventive device further comprises a cap 40 which surrounds the slot 29, the head nut 12 and the head nut end of the anchor bolt 10. This cap protects the slot 29 when concreting the second concrete component. 2

Another embodiment of an inventive device is in the FIGS. 3 to 7 illustrated, in which the sake of clarity, the anchor bolt 10 is not shown in these figures. That in the FIGS. 3 to 7 illustrated embodiment is a modification of the embodiment of Figures 1 and 2 and is based essentially on the same operating principle as the embodiment of the Figures 1 and 2 , Therefore, in the following, only the differences from the embodiment of Figures 1 and 2 explained. Incidentally, to the FIGS. 3 to 7 Reference is made to the above statements, which are also valid there.

In the embodiment of FIGS. 3 to 7 the foot part 23 of the mold element 20 is, conversely, mushroom-shaped and has both a longitudinal section (FIG. Fig. 4 ) as well as in cross section ( Fig. 6 ) has a shank region 31 with substantially vertically extending walls and a widened region 32 extending below the shank region 31 with at least partially oblique walls. In this widened region 32, the outside diameter of the molding element 20 measured in the horizontal direction and the diameter of the cavity 26 located in the interior of the molding element 20 measured in the horizontal direction increases towards the bottom. The inventive shape with shaft portion 31 and then widened area 32 allows a particularly good integration of the element 20 in the second concrete element 2 and ensures easy installation and alignment of the entire device, as well as the parallelism of the sliding plate 22 and the head nut 12 to the surface of the first concrete component 1 and / or the sealing element. 5

The mold element 20 has an injection opening 90 in its foot part 23, preferably in the widened region 32. This can be used for example for Nachinjizieren of sealant in the sealing cap. The injection port 90 is expediently before the conclusion of the assembly, in particular before concreting the second concrete component 2, closed, for example by means of a cap, not shown.

Furthermore, the mold element 20 in the embodiment of the FIGS. 3 to 7 Projections 24, which extend into the slot 29 of the voltage applied to the foot part 23 sliding part 22. By these projections 24, a positive connection is formed, which limits a horizontal movement of the sliding member 22 relative to the foot part 23.

In the embodiment of FIGS. 3 to 7 the cap 40 is secured by a snap closure on the mold element 20. This snap closure is formed by snap latches 50, which are integrally formed on the cap 40 consisting of a plastic material, and which engage around the sliding part 22 in the fixed state of the cap 40. In the interior of the cap ribs 45 are provided, which secure the head nut 12 against rotation in the fixed state of the cap 40 and center the head nut 12 on the slide member 22 and align parallel. The cap 40 is provided at its lower, the slide member 22 aligned edge with a raised edge, which prevents ingress of concrete into the cavity under the cap 40.

It is further provided that the mold element 20 has four ribs 60 for centrally fixing the anchor bolt 10 during assembly. These vertically extending ribs 60 are arranged in the shaft region 31 of the formula element.

Another embodiment of the invention is in FIG. 8 dargstellt. This embodiment is based on the embodiment of FIG FIGS. 3 to 7 , According to the embodiment of the FIG. 8 For example, the molding element 20 may comprise an expansion body 71 (FIG. FIG. 8 middle) or a plurality of expansion bodies 71, 72 (FIG. FIG. 8 right), which are arranged between the foot part 23 and the sliding part 22. By means of these expansion bodies 71, 72, the anchoring depth of the anchor bolt 10, in particular in the second concrete component 2, can be made variable, which results in different levels of absorbable tensile loads. With the expansion bodies 71, 72 and a correspondingly long anchor bolt 10 so the range of applications is greatly expanded and made more flexible in a simple way. In particular, different load classes can be realized with one construction.

The extension bodies 71, 72 are designed in the shape of a frame and are formed by means of the projections 24 (FIG. Fig. 4 ) is positioned on the foot part 23. The expansion bodies 71, 72 may have corresponding projections for positioning the sliding part 22 or possibly further expansion bodies 71, 72 present.

The foot part 23 of FIG. 8 is according to the embodiment of FIGS. 3 to 7 is formed, in addition, a sealing lip 80, for example made of flexible plastic, for sealing the molding element 20, in particular its foot part 23, relative to the first concrete component 1 and / or the sealing element 5 is provided. Such a sealing lip can also in the embodiments of FIGS. 1 to 7 be used.

Claims (11)

Device for anchoring a second concrete component (2) to a first concrete component (1), with
an anchor bolt (10), which is intended for installation in the first concrete component (1), a mold element (20), which is intended for installation in the second concrete component (2), wherein the anchor bolt (10) through an opening in the form element ( 20) is passed, and
a head nut (12) which is arranged on the anchor bolt (10) and with which the mold element (20) can be anchored on the first concrete component (1),
characterized,
in that the opening in the shaped element (20) is a slot (29), so that the shaped element (20) for accommodating displacements between the two concrete components (1, 2) is displaceable relative to the anchor bolt (10). Device according to claim 1,
characterized,
in that the shaped element (20) has a cavity (26) and a planar edge region (21) for bearing against the first concrete component (1). Device according to one of the preceding claims,
characterized,
in that the shaped element (20) is designed in several parts with a plate-shaped sliding part (22) and a foot part (23), the slot (29) being arranged in the sliding part (22). Device according to claim 3,
the foot part (23) has at least one projection (24) which projects into the slot (29) in the slide part (22). Device according to one of the preceding claims,
characterized,
that the shaped element (20) in the cross-section and / or in the longitudinal section at least partially mushroom-shaped with a shank region (31) and a widened region (32) is formed. Device according to one of the preceding claims,
characterized,
that a covering cap (40) for covering the elongated hole (29) and the head nut (12) is provided. Device according to claim 6,
characterized,
in that the covering cap (40) is fixed to the form element (20) by means of a snap connection. Apparatus according to claim 6 or 7,
characterized,
that the cover cap (40) has at least one rib (45) for fixing and / or aligning the head nut (12). Device according to one of the preceding claims,
characterized,
that the shaped element (20) has at least one rib (60) for fixing the anchor bolt (10) during assembly. Device according to one of the preceding claims,
characterized,
in that the shaped element (20) has at least one removable extension body (71, 72). Building construction comprising a first concrete component (1), a second concrete component (2) and a device according to one of the preceding claims, wherein the anchor bolt (10) is anchored in the first concrete component (1), in particular dowelled or concreted in, and the molding element (20) is installed in the second concrete component (2).

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