DK2610412T3

DK2610412T3 - Fugeanker to a partition line between the concrete wall elements

Info

Publication number: DK2610412T3
Application number: DK13001544.9T
Authority: DK
Inventors: Gundolf Kaupp
Original assignee: Redima Ag
Priority date: 2010-01-24
Filing date: 2010-11-30
Publication date: 2016-04-25
Also published as: EP2610412B1; EP2348162B1; EP2348162A3; DE202010016039U1; PL2348162T3; DK2348162T3; EP2610412A1; EP2348162A2; PL2610412T3; DE102010005439A1

Description

The invention relates to a jointing anchor of a device for sealing a separation joint to be filled between concrete wall elements and to a separation joint between concrete wall elements which is filled with a joint-filling material. DE 80 16 798 U1 shows a jointing anchor of a device for covering a separation joint between two concrete wall elements by means of a covering strip, the jointing anchor having an anchor shaft with an anchor head that can be clamped firmly in the joint and is fixed to the covering strip opposite to the anchor head. DE 10 2008 013 206 A1 has disclosed a method for joining precast concrete parts in which a joint seal is produced with a sealing mortar by using an additional tool. This tool, having two spreading blades, permits temporary sealing of the separation joint as the separation joint is filled with the sealing mortar, in that the two spreading blades are guided along the separation joint as the sealing mortar is fed in. As a result of the application of the separate sealing mortar and the necessary curing time of this sealing mortar, this method is complicated, and a substantial disadvantage resides in the fact that the load-bearing ability of this sealing mortar cannot be calculated sufficiently reliably.

It is also known to spray separation joints with mounting foam and thus to close them so that, during the subsequent concrete pouring, the concrete slurry cannot escape through the separation joint. Following the curing of the concrete, the mounting foam has to be scratched out with a great deal of effort and the surface of the filled separation joint has to be rendered uniformly. DE 88 09 399 U1 has disclosed a preformed joint seal for joints between precast reinforced concrete parts that supplement one another to form a container jacket. The joint seal is a lip seal having an elastic stem, which is arranged in the joint between mutually opposite outer webs of the two precast reinforced concrete parts adjoining one another at the joint, filling the joint. Filling compound put into the joint presses against the joint seal, which is supported on the outer webs of the two precast reinforced concrete parts. Following the curing of the filling compound, the preformed joint seal remains in the joint. This type of joint seal is therefore comparatively complicated, since it is not re-usable.

The object of the invention is to provide a jointing anchor mentioned at the beginning with improved holding properties and to devise a separation joint mentioned at the beginning which can be sealed off with less outlay.

The object is achieved by a jointing anchor having the features of Claim 1 and by a separation joint having the features of Claim 7.

Advantageous refinements of the invention are specified in the dependent claims.

In order to seal off a separation joint, first of all a sealing strip having at least one associated jointing anchor is moved into a position sealing off the separation joint on the concrete wall elements bounding the separation joint, the jointing anchor being brought into a mounting position reaching through the separation joint. Then, the sealing strip is preloaded against the concrete wall elements by means of the jointing anchor, which is brought with a head section into a fixing position gripping or engaging behind at least one of the concrete wall elements. The separation joint is then filled with joint-filling material and, following the curing of the joint-filling material, a base section of the jointing anchor that is associated with the sealing strip is severed from the head section held by the joint-filling material and the sealing strip and the severed base section are removed from the separation joint. The head section held by the joint filling material remains in the joint-filling material. A sealing strip of the device according to the invention is an elongated flat or profiled component which has one or more surfaces which can have a different shape, at least one of the surfaces covering a separation joint or else reaching into a separation joint and being able largely to cover this separation joint between two concrete wall elements in a sealing manner. The necessary tightness depends on the joint filling material used and on the surface quality to be provided by the filled separation joint. The sealing strip is a sufficiently bend-resistant component which is produced from metal, plastic or else, for example, from a composite material and can be reused many times on account of its material properties. A concrete wall element is a component which is used for producing a wall or else a ceiling of a structure of any type or else a wall, separation joints between two concrete wall elements or else between a concrete wall element and an adjoining component of a another type which bounds the separation joint being at least partly filled by means of a concrete slurry or another liquid, free-flowing or pasty joint-filling material, which subsequently solidifies or cures and thus remains in the separation joint. The separation joint to be filled can be arranged horizontally, vertically or in principle in any spatial orientation. A jointing anchor is a holding and fixing part which, in any configuration, is suitable to fit and detachably fix the sealing strip to the separation joint or to the components forming and bounding the separation joint, via holding forces introduced directly or indirectly. During mounting, the jointing anchor is positioned on and in the separation joint before, with or after the fitting of the sealing strips. Each sealing strip is fixed by using at least one jointing anchor. A plurality of identical or different jointing anchors of a sealing strip, which are spaced apart from one another along the sealing strip, can be brought into their mounting position, in which they reach through the separation joint, simultaneously or one after another.

Each jointing anchor is brought with a front section, for example described as a head section, into a fixing position engaging behind at least one of the concrete wall elements and directly or indirectly placed and supported via at least one auxiliary component, which is arranged on the structural element or concrete wall element, the fixing being made in particular by a form fit or else by a frictional fit.

The form-fitting holding engagement can be made, for example, on an edge on a rear side or inner side, opposite the sealing strip, of the structural element or concrete wall element bounding the separation joint.

Engaging behind at least one of the concrete wall elements is also understood to mean fixing the jointing anchor or its head section in the separation joint, it being possible for this fixing to be made by a frictional fit or, for example, in a groove or on a protrusion which is formed in a surface of a component or concrete wall element that faces the separation joint or on an inserted auxiliary component.

Depending on the configuration of the head section or of an anchoring head of the jointing anchor, fixing of the jointing anchor is accordingly performed only on one of the components or concrete wall elements or on both of the components or concrete wall elements.

The separation joint is then filled with joint-filling material. The filling is carried out, for example, when grouting hollow-wall or double-wall elements, which are erected adjacent to one another, forming a separation joint, and the cavities of which are filled with concrete slurry in a known way. Following the curing of the joint-filling material, which in particular is formed by the concrete slurry, a section of the jointing anchor, which is also designated a base section and which is located opposite its head section, is separated from the head section held by the joint-filling material. The base section contains the section of the jointing anchor which is in holding engagement with the sealing strip during the fixing. Therefore, the tensile force acting on the sealing strip is cancelled, so that both the base section of the jointing anchor and the sealing strip can be removed from the separation joint. Only the head section held by the joint-filling material remains in the joint-filling material and therefore in the separation joint, but in a position that is largely not visible from the front side. The sealing strip can then be used again on another separation joint with the device according to the invention, new jointing anchors being used.

The handling of the jointing anchor is preferably carried out manually, for example via a handle on the end or base section of the jointing anchor located opposite the head section or anchor head, via which the jointing anchor can be positioned and via which a tensile force can be applied. However, mechanical actuation of the jointing anchor by means of an appropriate handling device could also be provided.

The jointing anchor is preferably displaced about its longitudinal axis in such a way that at least one projection or anchor hook of the anchor head grips or engages behind at least one of the concrete wall elements. The anchor hook can thus be pushed into a narrow separation joint, the anchor hook extending substantially parallel to the wall surfaces bounding the separation joint, and can then be rotated or pivoted into a locking position and in particular into a transverse position, which permits holding or locking engagement on one or both components or concrete wall elements bounding the separation joint.

The jointing anchor can be fixed or latched directly or indirectly on the sealing strip by means of a holding device, so that the sealing strip is fitted to the concrete wall elements under preload, sealing the separation joint. An indirect fixing is made, for example, via an additional component which is arranged between the jointing anchor and the sealing strip and which transmits the preloading force.

Expediently, following the curing of the joint-filling material, the base section of the jointing anchor is severed, in particular by means of a tensile or flexural loading, in a region between the holding device or latching device and the anchor head. The separation takes place in particular at a point that is substantially flush with the surface of the cured joint-filling material. A device for sealing a separation joint to be filled between two concrete wall elements or a concrete wall element and another component thus contains at least one sealing strip, which has a placement device for placing the sealing strip covering the separation joint on the two components or concrete wall elements bounding the separation joint. Such a placement device can be a respective flat surface of the sealing strip or a surface of the sealing strip, the shape of which is matched to the concrete wall element. The jointing anchor contains a base section having an anchor shaft and a head section having an anchor head for gripping or engaging behind a section of at least one of the two concrete wall elements. The anchor shaft is a section of any desired shape which, in particular, is formed like a rod having a round or rectangular cross section, for example. A holding or force-transmitting device spaced apart from the anchor head on the anchor shaft is used for the direct or indirect support of the jointing anchor on the sealing strip and can be implemented in many configurations. A handling device of the jointing anchor permits the positioning of the jointing anchor and the application of force to the jointing anchor for the preloaded fixing of the sealing strip and in particular also for the application of the force for severing the base part of the jointing anchor when removing the sealing strip. The sealing strip further contains at least one cut-out for the jointing anchor to be led through or stuck through, in particular by using its handling device, and a supporting device for supporting the jointing anchor on the holding device counter to a movement in the direction of the anchor head.

If an intended fracture point is formed on the anchor shaft, between the anchor head and the holding device, a preferred fracture or separation point is provided in a defined manner.

In a simple configuration, the holding or force-transmitting device can have a latching device or be formed as a latching device; however, other configurations having screw threads with longitudinally displaceable nuts or having a number of openings formed one after another on the anchor shaft for the respective engagement of a wedge or the like are possible.

The sealing strip can be a profile which is flat, angular, curved or tubular in cross section or can have such profiled sections. In particular, a section engaging in the separation joint can have a configuration matched to the cross section of the separation joint.

In particular, the supporting device can have an engagement part which can be fitted detachably to the sealing strip. In different embodiments, the engagement part can be matched to differently configured jointing anchors, so that for different jointing anchors, it is not necessary for all of the sealing strip but only the engagement parts to be matched. A jointing anchor according to the invention, in particular of an aforementioned device for sealing a separate joint to be filled between two concrete walls or the like by means of a sealing strip, in principle contains a base section having an anchor shaft and a head section having an anchor head for gripping or engaging behind a section of at least one of the two concrete wall elements. The anchor head has at least one projection or anchor hook. A holding device, in particular a latching device, for the axial locking of the jointing anchor counter to an in particular axial movement in the direction of the anchor head is provided on the base section. Furthermore, a handling device is provided for the jointing anchors, in particular for applying an axial tensile force to the jointing anchor. Suitable as a projection or anchor hook is any element which permits the anchor head or the jointing anchor to be fixed counter to an axial displacement, such as, for example, a single-sided or simple or else a two-sided or twofold projection or hook. Such a projection or hook can be fixed or else foldable or pivotable, so that, pivoted in, it fits through a narrow separation joint and after that can be pivoted out in order to permit engagement behind components bounding the separation joint.

The anchor shaft preferably has an intended fracture or intended separation point, in particular between the holding device or latching device and the anchor head, so that the base section can be severed from the head section when the jointing anchor is fixed in or on the separation joint by a joint-filling material.

Expediently, the anchor head of the jointing anchor and/or the anchor shaft can be deformed elastically in such a way that, under preload, it provides a restoring force acting axially on the anchor shaft. The elastic deformability can be achieved by the material itself and/or by means of an appropriate configuration.

In a preferred configuration, the holding or force-transmitting device is formed on or fitted to the jointing anchor in such a way that it is effective substantially only in a plane which is spanned by the anchor shaft and the at least one projection or anchor hook on the anchor head. While the jointing anchor is inserted through the joint in its mounting position, the holding or force-transmitting device is accordingly ineffective. When the jointing anchor is then brought into its clamping or fixing position, the holding or force-transmitting device is then able to clamp the sealing strip in its sealing position on the joint.

In principle, the jointing anchor described is provided and suitable for a device according to the invention and also for a method according to the invention.

In a separation joint according to the invention, such a jointing anchor extends through the joint-filling material in the separation joint and is held by said material, on the front side of the joint, an anchor shaft of the jointing anchor ending at a separation point, in particular an intended fracture point, and on the rear side of the joint, an anchor head of the jointing anchor being held by the joint-filling material. By means of this lost jointing anchor, the separation joint can be produced simply and economically, in particular also by the use of a concrete grouting material as joint-filling material.

The separation joint is expediently produced in accordance with the method described and/or by using a device as described and/or a jointing anchor as described.

The invention accordingly permits the filling of a separation joint in a simple way by using a joint-filling material which is at the same time the grouting material or the concrete slurry, so that the separation joint according to the invention and also the method is produced without using a dedicated separate joint filling or a separate joint-filling means. Therefore, time for previous curing of a specific jointfilling material according to the prior art is not required either. The strength of a separation joint filled in accordance with the invention can be determined statically, since a uniform material structure is present in the separation joint and the adjacent regions.

In the following text, exemplary embodiments of the device, of the jointing anchor and of the separation joint will be explained in more detail with reference to the drawing, in which:

Fig. 1 shows, in a cross-sectional view, a separation joint between two concrete wall elements before the use of the device according to the invention;

Fig. 2 shows, in a cross-sectional view, the separation joint with the device according to the invention fitted thereto;

Fig. 3 shows a jointing anchor according to the invention in a perspective view;

Fig. 4 shows a perspective view of a sealing strip according to the invention having a jointing anchor illustrated in three positions;

Fig. 5 shows a perspective view of the joint side of the sealing strip;

Fig. 6 shows, in a cross-sectional view according to Fig. 2 and in an enlarged illustration, a separation joint between two concrete wall elements with a device according to the invention arranged thereon according to a further exemplary embodiment during mounting;

Fig. 7 shows, in a cross-sectional view according to Fig. 6, the device arranged in the separation joint in a further mounting position;

Fig. 8 shows, in a cross-sectional view according to Fig. 7, the device arranged in the separation joint with locked jointing anchor and filled joint;

Fig. 9 shows, in a cross-sectional view according to Fig. 8, the filled separation joint following the removal of the sealing strip;

Fig. 10 shows, in a plan view and in an enlarged illustration, a detail of toothing on a latching device of the jointing anchor;

Fig. 11 shows, in a cross-sectional view, a plurality of basic shapes of sealing strips:

Fig. 12 shows an embodiment of an anchor hook, in side view in each case;

Fig. 13 shows, in side view (and additionally in plan view in the case of a. and c.) a respective exemplary embodiment of an anchor shaft;

Fig. 14 shows, in a perspective plan view in a sectioned half-illustration, an exemplary embodiment of an engagement part that can be fitted to the sealing strip for the jointing anchor;

Fig. 15 shows, in a longitudinal sectional view, a section of the engagement part on a sealing strip;

Fig. 16 shows, in a longitudinal plan view, the engagement part on a sealing strip; and

Fig. 17 shows, in a cross-sectional view, the engagement part on a sealing strip.

Two hollow-wall or double-wall elements 1 and 2 (see Figs 1 and 2) are produced in a known manner as precast concrete partial elements in a concrete factory and, at their location of use, are set up beside one another in order to erect a wall. Each double-wall element 1, 2 has two flat concrete wall elements 3 and 4 spaced apart from each other, which, by means of a reinforcement 5, are kept at their mutual spacing with a cavity 6 located in between. The two double-wall elements 1 and 2 are set up at a distance from each other such that a separation joint 7 is formed between the two aligned concrete wall elements 3 and 3 and, respectively, 4 and 4. Each concrete wall element 3, 4 contains, for example, a joint front side 8 and a chamfer 9 located on the outside, so that, in cross section, the separation joint 7 has an internal channel section 10 with parallel boundaries formed by the joint front sides 8 and a V-shaped channel opening 11 on the outer side.

Before the cavities 6 of the wall formed from the double-wall elements 1 and 2 are filled with concrete, the separation joints 7 are closed on the outside, in order to prevent any escape of a concrete slurry to be put in. A device according to the invention for sealing or closing the separation joint 7 contains a sealing strip 12, which is placed on the two concrete wall elements 3, 4 bounding the separation joint 7, in such a way that it covers the separation joint 7 and substantially seals the latter off against the escape of concrete slurry, which also forms a joint-filling material 13 (see Fig. 8, in which the concrete slurry in the cavity 6 is shown as a detail), and a jointing anchor 14, with which the sealing strip 12 is detachably fixed to the two concrete wall elements 3 (and, respectively, 4) in the region of the separation joint 7.

In the exemplary embodiment illustrated in Fig. 2, the sealing strip 12 is shaped in cross section such that it matches the contour of the V-shaped channel opening 11. For this purpose, the sealing strip 12 contains a V-shaped central section 15 to be placed on the two chamfers 9 and two lateral contact limbs 16 to be placed on the outer surfaces of the two concrete wall elements 3 and 4, which in particular form a placement device of the sealing strip 12.

The explanation of the device according to the invention is firstly carried out in the further text by using an exemplary embodiment of the sealing strip 12 according to Figs 4 to 8. This sealing strip 12 likewise contains a V-shaped central section 15, but which is adjoined on both sides by limbs 17 oriented at an angle to each other, the end edges 18 of which bound a narrow longitudinal slot 19. The sealing strip 12 thus forms a stable, largely closed, tubular profile with a narrow longitudinal slot 19, which extends opposite a channel-like front edge 20 on the V-shaped central section 15 of the sealing strip 12. Formed in the front edge 20 are a plurality of slot-like cut-outs 21 or slots, which are arranged spaced apart from one another in the longitudinal direction of the sealing strip 12.

The jointing anchor 14 (see Fig. 3) contains a base section with an elongated rodlike anchor shaft 22 with a round or rectangular cross section, for example, and a head section having an anchor head 23 with two opposite anchor hooks 24 to engage behind the two concrete wall elements 3 and 4. At a distance from the anchor head 23, the anchor shaft 22 contains a holding or force-transmitting device, for example in the form of a latching device 25, which is formed as latching toothing arranged on both sides and having a multiplicity of teeth 26, which are arranged one after another along the anchor shaft 22 and have latching surfaces 27, which keep an engagement part 28 blocked relative to a handle 29, which forms the end of the jointing anchor 14 opposite the anchor head 23. The engagement part 28, is for example, formed by the two end edges 18 of the limbs 17 or is an independent component, as illustrated in Fig. 2 or in Figs 14 to 17. The handle 29 has the shape of a ring, for example, and is arranged in the plane of the anchor hook 24.

The length and width of the slot-like cut-outs 21 are matched to the handle 29, for example, so that, in a simple mounting operation, the jointing anchor 14 can be stuck with the handle 29 in front through the respective cut-outs 21 from the side of the front edge 20.

During the mounting of the device, first of all at each cut-out 21, a jointing anchor 14 with handle 29 aligned parallel to the cut-out 21 is stuck through this cut-out 21 and also through the opposite longitudinal slot 19 (in Fig. 4, the right-hand jointing anchor 14 is illustrated in this position).

The sealing strip 12 with the three jointing anchors 14, for example, is then arranged with its central section 15 on the separation joint 7, the central section 15 being placed on the chamfers 9 and thus the separation joint 7 being substantially sealed off. Each jointing anchor 14 is stuck through the separation joint 7 and positioned in such a way that its anchor shaft 22 extends until behind the separation joint 7 and, accordingly, the anchor head 23 is arranged on the inner side in the cavity 6 behind the separation joint 7 (see Fig. 6).

Thereupon, each jointing anchor 14 is rotated through about 90° around its anchor shaft 22 by means of its handle 29 (see Fig. 4, illustration of the central jointing anchor 14, and also Fig. 7). The latching device 25 or the toothing on the anchor shaft 22 is located within the profile of the sealing rail 12 and, as a result, the teeth 26 are brought transversely with respect to the longitudinal slot 19 into a position in which they can be latched or locked in the next mounting step. At the same time, the anchor head 23 pivots through 90°, so that the two anchor hooks 24 are aligned transversely with respect to the separation joint 7 and each engage over an anchoring edge 30 of the concrete wall elements 3, 4, which bounds the separation joint 7 on the rear or inner side of the concrete wall elements 3, 4.

Then, each jointing anchor 14 is pulled away from the concrete wall elements 3, 4 and the sealing rail 12 by means of its handle 29, until the two anchor hooks 24 bear firmly with their tips on the anchoring edges 30 of the two concrete wall elements 3, 4 (see Fig. 8 and Fig. 4, illustration of the left-hand jointing anchor 14). As the jointing anchor 14 is pulled, the section of the anchor shaft 22 having the latching device 25 and having the teeth 26 is moved through the longitudinal slot 19. The width of the anchor shaft 22 at the latching device 25 in the direction of the projecting teeth 26, and the width of the longitudinal slot 19, are coordinated with one another in such a way that the two limbs 17 are able to slide over the tips of the teeth 26 but, because of the resilience of the limbs 17 of the sealing strip 12, produced from a steel sheet, for example, the end edges 18 are able to engage in the cut-outs 30 between two teeth 26 and are able to bear on the associated latching surfaces 27 of the teeth 26 in latching or locking engagement when the jointing anchor 14 has assumed its holding, clamping or locking position.

The anchor head 23 and the two anchor hooks 24 have a certain elasticity because of the material properties and/or configuration, so that given a high tensile force and elastic flexing of the anchor hooks 24, the jointing anchor 14 is brought into a latching position in which the end edges 18 of the limbs 17 securely assume a latching position on the teeth 26. If the tensile force is then removed and the handle 29 is released, the elastically preloaded anchor hooks 24 generate a clamping and holding force of the jointing anchor 14 in the direction of the anchor shaft 22 and, via the latching device 25, on the limbs 17 of the sealing strip 12, which is thus forced into the separation joint 7 by this clamping force and seals off the said joint. The latching device 25, as an example of a force-transmitting device, thus applies the clamping force from the jointing anchor 14 to the sealing strip 12.

Following the mounting of the sealing strip 12, the cavity 6 is filled with concrete slurry, which flows into the separation joint 7 and onto the sealing strip 12. After the concrete slurry has been cured, by means of pulling on the handle 29, the anchor shaft 22 can be severed at an intended fracture point 31, the tensile force exceeding the force applied for latching. The intended fracture point 31 is expediently located between the anchor head 23 and the latching section 25 and in particular at that point which, in the position according to Fig. 8, is arranged on the cut-out 21 (the intended fracture point 31 is shown only schematically in Fig. 3). The front or head section of the jointing anchor 14 thus remains with the anchor head 23 in the cured concrete slurry or the joint-filling material 13. The sealing strip 12 is accordingly detachable from the separation joint 7 after the severing of the jointing anchor 14 and, if appropriate, can be re-used following cleaning of residues of concrete slurry.

The filled separation joint 7 is given an external V shape with the two chamfers 9 and the V-shaped groove 32 located in between, which has a comparatively smooth surface.

The re-usable sealing strip 12 is, for example, prepared in lengths of 1, 1.5 or 2 m and, for example, consists of a steel sheet or a lightweight metal with a specific number of cut-outs 21, at which the fixing by means of the jointing anchor 14 is carried out. In the case of relatively long separation joints 7, at least two sealing strips 12 are arranged and mounted following one another in the longitudinal direction.

The separation joint 7 can be configured differently or have differently configured cross sections. Accordingly, the sealing strips 12 can have different cross sections matched to the separation joint 7. In Fig. 11, some sealing strips 12 having different cross sections are shown by way of example.

The sealing strip 12 according to Fig. 11 b. is illustrated in Fig. 2 in its installed position. In the case of this sealing strip 12, a separate engagement part 28 is provided, which has the cut-out for the interaction with the latching device 25 of the jointing anchor 14 and which, in the clamped position, is supported on the sealing strip 12 and as a result presses the latter against the separation joint 14. The engagement part 28 is, for example, a flat band-like strip, plate or the like. A flat, band-like sealing strip 12 according to Fig. 11 a. is suitable for covering and sealing separation joints 7 of different cross sections, since it covers the separation joint 7 at the outwardly directed end of the latter, irrespective of the internal cross section. The joint-filling material 13 then fills the separation joint 7 completely with an even, flat upper side. A V-shaped sealing strip 12 according to Fig. 11 c. is braced on the separation joint 7 by means of an engagement part 28. The engagement part 28 can be placed loosely on the sealing strip 12, detachably latched on the latter or is firmly connected thereto, for example adhesively bonded. The sealing strip 12 is suitable for separation joints 7 which are shaped correspondingly in cross section and are V-shaped, at least in the outer or front section, into which joints they can be inserted partly or wholly. On the other hand, this sealing strip 12 can also be inserted into the opening of a separation joint 7 having parallel boundary walls and, on its two limbs arranged in a V shape, be supported linearly on the corner edges of the two concrete wall elements.

The exemplary embodiment of the sealing strip 12 of Fig. 11 d. is similar to that of Fig. 11 c. but the sealing strip 12 has a closed triangular profile.

The profile of the sealing strip 12 shown in Fig. 11 e. corresponds approximately to that of the sealing strip 12 shown in Figs 6 to 8.

The channel-like profile of the sealing strip 12 having the cross section of a section of a circular arc of Fig. 11 f. is suitable for correspondingly shaped contact surfaces or chamfers 9 on the concrete wall elements 3, 4.

Finally, Fig. 11 g. shows a sealing strip 12 having a tubular profile.

In all the sealing strips 12 illustrated in Fig. 11, cut-outs 21 for receiving the jointing anchors 14 are not illustrated. Of course, they are provided in the necessary shape and arrangement.

Fig. 12 contains illustrations of different embodiments of anchor heads of the jointing anchors 14. Thus, Fig. 12 a. shows a rectangularly arranged plate or a rod, which forms the hook or the two oppositely projecting hooks, Fig. 12 b. shows a hook curved on one side, Fig. 12 c. shows a curved rod with two-sided hooks and Fig. 12 d. shows two hooks arranged such that they can be pivoted or folded, which, for example, are erected by a resilient force, can be folded against the anchor shaft as they are stuck into the separation joint 7 and can pivot out again behind the separation joint.

Fig. 13 contains illustrations of different configurations of holding or force-transmitting devices which are formed on the anchor shaft 22 and on which the sealing strip 12 is supported directly or indirectly. Fig. 13 a. shows, as a holding or force-transmitting device, a plurality of openings spaced apart in the longitudinal direction on the anchor shaft 22, into which a wedge can be stuck in order to support the sealing strip 12. According to Fig. 13 b., the anchor shaft can have a section with a thread, on which the sealing strip 12 is supported by an axially displaceable nut. Fig. 13 c. shows the anchor shaft having a latching device 25 with toothing.

The jointing anchor 14 (see Fig. 3, for example) is, for example, an injection-moulded part made of a plastic such as polyamide, polystyrene or polypropylene.

The sealing strip 12 can have a mounting aid device in order to find more quickly the correct positioning of the jointing anchors 14 to be stuck through the cut-outs 21. For example, at least one drilled hole 33 (see Fig. 4) in the sealing strip 12 is formed on the limb 17 approximately opposite to the cut-out 21 which indicates the correct position.

Figs 14 to 17 show an exemplary embodiment of an engagement part 28 which, in a manner comparable to Fig. 11 c. is fitted to a V-shaped or rectangular sealing strip 12. The engagement part 28, for example a plastic injection-moulded part, has two contact limbs 34, which are matched to the shape of the sealing strip 12 and permit stable flat contact of the engagement part 28 on the inner side of the sealing strip 12. Formed centrally on the vertex of the engagement part 28 is an elongated opening 35, the cross section of which permits the jointing anchor 14 to be stuck through, in particular by using the handle 29 of the latter, the engagement part 28 being arranged on the sealing strip 12 in such a way that the elongated opening 35 is arranged to be congruent with one of the cut-outs 21 of the sealing strip 12. The elongated opening 35 is bounded by two opposite locking lugs 36, which run slightly inclined with respect to each other, so that their marginal edges 37 can come into locking engagement with the teeth 26 of the latching device 25 of the jointing anchor 14.

The positionally accurate fitting of the engagement part 28 to the sealing strip 12 is facilitated and improved by two positioning teeth 38, which, at the vertex of the engagement part 28, project upwards or outwards on both sides of the opening 35 and which are arranged at a mutual spacing matched to the length of the cutouts 21 of the sealing strip 12. Each positioning tooth 38 has a hook-like tooth head 39 which, as it is stuck through the cut-out 21, springs back elastically and, after it has been stuck through, the sealing strip 12 engages behind beside the cut-out 21, by which means the engagement part 28 is fixed detachably to the sealing strip 12.

During the mounting of the sealing strip 12, in each case an engagement part 28 is fitted to one of the cut-outs 21 of the sealing strip 12, is used again after the separation joint 14 has been filled or is replaced if it is no longer serviceable. The engagement part 28 permits a simpler configuration of the sealing strip 12, since the locking no longer has to be carried out directly on the latter itself, and therefore no corresponding device has to be formed either.

The individual features of the invention disclosed in the description and by using the exemplary embodiment and in the figure can be combined in any desired technically expedient arrangements and configurations with the subject-matter of the invention in its general form.

List of reference symbols 1 Double-wall element 2 Double-wall element 3 Concrete wall element 4 Concrete wall element 5 Reinforcement 6 Cavity 7 Separation joint 8 Joint front side 9 Chamfer 10 Inner channel section 11 Channel opening 12 Sealing strip 13 Joint-filling material 14 Jointing anchor 15 Central section 16 Contact limb 17 Limb 18 End edge 19 Longitudinal slot 20 Front edge 21 Cut-out 22 Anchor shaft 23 Anchor head 24 Anchor hook 25 Latching device 26 Tooth 27 Latching surface 28 Engagement part 29 Handle 30 Cut-out 31 Intended fracture point 32 V groove 33 Drilled hole 34 Contact limb 35 Opening 36 Locking lug 37 Marginal edge 38 Positioning tooth 39 Tooth head

Claims

A joint anchor for a device for sealing a partition joint between two concrete wall elements (3, 4) to be filled by means of a sealing strip (12), comprising a joint anchor (22), an anchor head (23) with at least one protuberance or anchor hook (24) and which can be placed in the fastening position by at least one of the concrete wall elements (3, 4), a holding device (25), in particular a device for axially locking the joint anchor (14) at the sealing strip (12) and against a movement relative to this frame (12) towards the anchor head (23) and a handling device (29) located on the anchor head (14), in particular for applying an axial pulling force to the joint anchor (14).

A joint anchor according to claim 1, characterized in that the holding device (25) on the joint anchor (14) is designed or arranged so that it is essentially operative only in a plane formed by the anchor stick (22) and at least one projection or anchor hook (24) at the anchor head (23).

A joint anchor according to claim 1 or 2, characterized in that the anchor stick (22) has a forced breaking point (31), in particular between the holding device (25), respectively the alignment device, and the anchor head (23).

Joint anchor according to one of claims 1 to 3, characterized in that the anchor head (23) on the joint anchor (14) and / or the anchor stick (22) is so resiliently deformable that, when pre-tensioned, it provides an axially acting return force at the anchor stick. (22).

Use of the joint anchor according to one of claims 1 to 4 in connection with a device for sealing the partition (7) between the two concrete wall elements (3, 4), the partition being completed and at least the device comprising a sealing strip (12 ), which comprises a covering device for covering the sealing strip (12) at the partition (7), which is delimited by the two concrete wall elements (3, 4), and wherein at least one of the joint anchors (14) has - a base section with the anchor rod (22) and a main section with the anchor head (23) for gripping - or gripping behind - a portion of at least one of the two concrete wall elements (3, 4), and - wherein the holding device (25) is spaced apart from the anchor head (23). on the anchor stick (22) to serve for direct or indirect support of the sealing strip (12); and - a handling device (29), said sealing strip (12) having at least one recess (21) which can be pierced by the joint anchor (14) , especially with its handling a support device (29), and a support device (18, 28) for supporting the joint anchor (14) by the holding device (25) and against a movement in the direction of the anchor head (23).

Use of a joint anchor according to any one of claims 1 to 4 for a method for sealing a partition (7) between concrete wall elements (3, 4), wherein the partition is to be filled, in which method: - a sealing strip (12) is provided with at least one associated joint anchor (14) in a position that seals the partition (7) by defining concrete wall elements (3, 4), placing the joint anchor (14) in a mounting position where it engages through the partition (7), - the sealing strip ( 12) by means of the joint anchor (14) - which, with a main section, is placed in a fastening position where it engages or grasps behind one of the concrete elements (3, 4) - the sealing strip being prestressed against the concrete elements (3, 4), - filling the partition joint (7) with joint filler material (13), - after curing the joint filler material (13), a base portion of the joint anchor (14) assigned to the sealing strip (12) is separated from the base section held by the joint filler material (13). is the sealing strip (12) and the separated base portion of the dividing joint (7), the main portion held by the jointing material (13) remaining in the jointing material (13).

Partition between concrete wall elements (3, 4), which is filled with a joint material (13), characterized in that a joint anchor (14) according to one of claims 1 to 4 in the partition (7) extends through the joint material (13). and held by this, with at the front of the joint, the anchor rod (22) of the joint anchor (14) ends at a point of separation, in particular a forced breaking point (31), while at the rear of the joint, the anchor head (23) of the joint anchor (23) of the sealant material (13).