EP0787859A1 - Method and arrangement for recover, lay open and sealing covered expansion joints - Google Patents

Abstract

During laying of concrete panels (6), eg. for roads, L-shaped sealing sections of weldable plastics are laid on the sub-base at the spacing of the desired panel size in a mirror-image fashion with extensions (3) projecting upwards, which are joined together. Concrete is laid continuously by machine to cover the sealing sections. The position of the upper edges of the projections can be suitably detected under the concrete and the concrete can be removed to the left or right of the detected position to reveal the panel joint (7), which can be sealed. Preferably the joint is found by using a metal detecting device. A metal strip or section is provided at the upper edge of the projection. Also claimed in a sealing section of weldable plastics and a mobile device for revealing sealing joints.

Description

The present invention relates to a method for locating, exposing and / or sealing covered sealing joints, as occur in road construction when using concrete slabs, and a device for carrying out this method.

DE 40 33 937 discloses a device and a method for sealing a joint between two concrete slabs by means of a profile made of weldable plastic with an L-shaped cross section.

Furthermore, DE 43 36 379 discloses a sealing profile for joints between concrete slabs, and a method for sealing a joint between two concrete slabs with such a sealing profile.

In addition, DE 44 12 545 teaches a joint sealing of a joint between two concrete slabs.

All of these devices and methods are based on the same findings about the tightness problems of joints between adjacent concrete slabs, as they occur, for example, in road construction: concrete slabs cannot be used in any dimensions as road or floor covering without unforeseeable cracks occurring. Therefore, several concrete slabs are necessary from a certain extent of the area to be covered. When producing the concrete slabs in in-situ concrete, a separate shape is usually prepared and provided for each individual concrete slab. Concrete is continuously poured during the production of the top layer of the concrete slabs. This will provide the ones below Joint spaces covered. There is a need to find the joints again later.

At the points where the panels meet, there is a joint that needs to be sealed, as otherwise damage to the surface or contamination of the underlying soil will occur due to the ingress of water or, as in the case of petrol stations, ingress of pollutants. While the joints used to be simply made of a stretchable mass, e.g. a suitable polymer that has been cast is taught by the above Writings sealing methods and devices that ensure a more durable seal of the joints between the concrete slabs.

However, all of these processes are characterized by a further serious disadvantage: the concreting is rationally carried out mechanically in a continuous process, which cannot be meaningfully interrupted at the respective panel joints. The joints are also covered in this step. Therefore, after the concrete has been applied, it is necessary to uncover the covered joints so that they can be sealed, preferably by welding. Of course, only the absolutely necessary area above the actual joint should be exposed again. However, this is difficult and time-consuming with the previously known methods, and is often only possible incorrectly, since they do not allow an exact position determination of the joint.

It is therefore an object of the present invention to provide a method and associated devices which, on the one hand, make it possible to seal abutting concrete slabs by means of weldable plastic profiles, and on the other hand, at the same time, allow the joints which are to be sealed to be welded again to the necessary extent Expose without having to search for the joint, for example by measuring or trying.

The object is achieved by a method for locating, exposing and / or sealing covered joints on abutting concrete slabs, which is characterized in that first, in cross section, essentially L-shaped sealing profiles made of weldable plastic on the surface to be covered with concrete be laid at a distance of the desired size of the concrete slabs, the adjacent, preferably approximately mirror-image sealing profiles touching each other with their extensions formed at the upper ends so that the contacting, upper extensions of the plastic sealing profiles are suitably connected to one another are, or already are, to which the concrete is then applied, preferably in a continuous, mechanically operated process, said interconnected sealing profiles being covered by the concrete, whereupon the position of the sealing profiles under the concrete is detected using a suitable detection device, and then, to the left and / or to the right of the detected position, the concrete is removed again at a fixed distance predetermined by the geometry of the profile, as a result of which concrete plates which are next to one another have now formed and that s o finally the exposed joint is welded and sealed.

Preferably, the contacting sealing profiles can also be connected before the sealing profiles are laid on the surface to be covered with concrete.

The profiles can be welded within the joints by a known method, as taught, for example, by DE 43 36 379. A soft fiber board, preferably made of mineral fiber, which is bound with mineral bitumen, e.g. be introduced as a buffer. The correct horizontal position of the panels relative to one another can be ensured by dowels, which each extend from one panel into the next panel. These dowels go through the joints. In the area of the joints, they can be provided with a corrosion protection, preferably a casing. The profile geometry of the sealing profiles can be used in the method according to the present invention to ensure a uniform joint width and thus also a uniform distance between the panels to be installed.

The connection of the upper continuations of the plastic sealing profiles can preferably take place by means of a seam, by means of gluing to one another or also by means of tacking.

A metal detector can be used to detect the top edge of the interconnected continuations of the sealing profiles, which detects a metallic device, preferably a metal strip or a metal profile on the top edge or below the interconnected sealing profiles.

The joint can preferably be exposed by means of a device which, starting from the detected position of the upper edge of the interconnected continuations of the sealing profiles, separates the concrete on the left and / or right thereof at the distance determined by the profile geometry.

The sealing profile made of weldable plastic for joints between installed panels, for carrying out the method described above is essentially L-shaped in cross section (with a base leg and a joint leg), the profile on the side facing the panel preferably having at least one profile projection an anchor with adhesive bridge, e.g. Tissue, which can be embedded in the associated plate in a form-fitting manner, and according to the invention is characterized in that the profile forms an upward continuation at its upper end, which touches the corresponding continuation of the profile of an adjacent laid plate.

Preferably, the upper continuation of the profile, like the profile itself, is also L-shaped, here with its base leg approximately parallel to the surface and with its upwardly projecting leg parallel to the joint.

In one embodiment, the sealing profile according to the invention is characterized in that the profile forms a projection into the joint on its joint leg, which is shaped in such a way that a profile belonging to the adjacent plate, which has the same projection, with the aid of its projection in the other Can intervene. This also makes it possible to achieve a fixed joint width.

The sealing profile preferably has, in particular on its upper continuation, for example on its upper edge, a metal strip or a metal profile which can be detected by a metal detector.

The device for exposing sealing joints according to the method described above is characterized according to the invention in that it has a suitable detection device, preferably a metal detector, which detects the position of the sealing profiles, and directly above or to the left and / or right thereof, devices for separating the concrete into the distance determined by the profile geometry, and further includes a control logic that only operates the separating device when the detection device is in position above the upper edge of the interconnected upper continuations of the sealing profiles.

The device for separating the cover layers preferably has separating disks which can be moved downwards. However, this can e.g. also by a sufficiently wide, preferably about 1 cm wide saw blade or two saw blades.

Instead of the concrete to be applied, another covering that is suitable for covering can preferably also be used.

By using the method and the devices according to the present invention, the reproducible and rationally feasible retrieval, exposure and welding of panel joints is possible.

An essential advantage of the invention is that the joint does not have to be found by measuring or even searching, but can be easily detected.

In this way, entirely unnecessary or unnecessarily wide zones in which the covering layer has to be removed again for exposure are avoided.

Fig. 1

ein Abdichtungsprofil nach der vorliegenden Erfindung im Querschnitt,

Fig. 2

das Abdichtungsprofil entsprechend Fig. 1 im Querschnitt, jedoch spiegelsymmetrisch zu Fig. 1,

Fig. 3

die Abdichtungsprofile entsprechend Fig. 1 und Fig. 2, wobei diese aneinanderstoßen,

Fig. 4

das Zusammenwirken der Abdichtungsprofile gemäß Fig. 1 und Fig. 2 im Verbund mit zwei Betonplatten im Querschnitt,

Fig. 5

einen Querschnitt mit Betonplatten und einer Fuge, vor vor dem Freilegen der Fuge,

Fig. 6

einen Querschnitt mit Betonplatten und einer Fuge, bei der Detektion des Abdichtungsprofils,

Fig. 7

einen Querschnitt mit Betonplatten und einer Fuge, nach Freilegung der Fuge,

Fig. 8

einen Querschnitt einer Vorrichtung zur Freilegung der Fuge nach der vorliegeden Erfindung, im Zustand der Detektion der Fuge, aber vor ihrer Freilegung, und

Fig. 9

einen Querschnitt einer Vorrichtung zur Freilegung der Fuge nach der vorliegenden Erfindung, im Zustand nach der Freilegung der Fuge.

In the following, exemplary embodiments are discussed and explained with reference to the accompanying drawing. In this show:

Fig. 1

a sealing profile according to the present invention in cross section,

Fig. 2

1 in cross section, but mirror-symmetrical to FIG. 1,

Fig. 3

1 and 2, the abutting profiles corresponding to one another,

Fig. 4

the interaction of the sealing profiles according to FIG. 1 and FIG. 2 in combination with two concrete slabs in cross section,

Fig. 5

a cross section with concrete slabs and a joint, before the joint is exposed,

Fig. 6

a cross section with concrete slabs and a joint, in the detection of the sealing profile,

Fig. 7

a cross section with concrete slabs and a joint, after exposure of the joint,

Fig. 8

a cross section of a device for exposing the joint according to the present invention, in the state of detection of the joint, but before its exposure, and

Fig. 9

a cross section of a device for exposing the joint according to the present invention, in the state after the exposure of the joint.

Fig. 1 shows a sealing profile according to the present invention in cross section. It has a base leg 1, a joint leg 2, an upper, likewise L-shaped extension 3, two anchors 4, and two projections 5 formed into the joint.

Fig. 2 shows the sealing profile corresponding to Fig. 2 in cross section, but mirror-symmetrical to Fig. 1 to give an idea of the interaction.

Fig. 3 shows the sealing profiles corresponding to Fig. 1 and Fig. 2, these now abutting each other in the area of their upper L-shaped extension 3, whereby they, as well as by their now interlocking projections 5 formed into the joint at a fixed distance are held to each other.

FIG. 4 shows the interaction of the sealing profiles according to FIGS. 1 and 2 in conjunction with two concrete slabs 6, which are closed off from the respective sealing profiles to the joint 7 here.

Fig. 5 shows a cross section with concrete slabs 6 and a joint 7 which is sealed according to the method of the present invention. It shows the cross-section in a state before the joint was exposed.

FIG. 6 shows a cross section with the concrete slabs 6 and the joint 7 which is sealed according to the method of the present invention, the upper edge of the upper continuation of the sealing profiles provided with a metal strip being located using a metal detector 9.

Fig. 7 shows a cross section with the concrete slabs 6 and the joint 7, which is sealed according to the method of the present invention, after first covering the joint 7, then the upper edge of the upper continuation of the sealing profiles has been located with the metal detector and, finally an area 10 above the joint 7 was exposed again. The welding can then be carried out on this.

Fig. 8 shows a cross section of a device for exposing the joint according to the present invention, in the state of the detection of the joint, but before its exposure. The device is designed here as a vehicle on wheels 11. It has a metal detector 9, with separating disks 12 which can be moved downward to the left and right of it to separate the concrete. If the vehicle is in the correct position above the joint, as determined by the metal detector 9, the cutting discs 12 can be actuated to cut the concrete.

Fig. 9 shows a cross section of a device for exposing the joint according to the present invention, in the state after the exposure of the joint. The separating disks 12 have already sawed the concrete above the joint and the concrete was removed manually or by machine in the region of the joint.

The following features have been shown to be suitable for use in the joint sealing of joints of adjacent concrete slabs in any combination with one of the aforementioned features, but also without a combination with such a feature and in particular without the need to use the method according to the invention for locating joints.

The profiles 1, 2, which are L-shaped, always have a joint leg 2 assigned to the joint. It is connected to an end face of the concrete slab, preferably it has at least one anchor 4 which engages in the concrete body of a slab 6. The other leg, namely the base leg 1, can either engage on the underside of the concrete slab, or be arranged on the top of the concrete slab or be embedded in the concrete in the vicinity of one of these two surfaces. L-profiles 1, 2, which consist of a metal angle, for example a steel profile that is plastic-coated, in particular coated with HDPE, have proven to be particularly preferred. The coating can be done, for example, by powder coating.

Is the L-profile immediately adjacent surface layer of the plate 6 made of concrete so that plastic parts, for example colloidally suspended HDPE particles, z. B. balls or schnitzel, embedded, a connection with an L-profile made of appropriate plastic 1,2 is possible, for example by welding. When the heat is applied, the plastic embedded in the concrete melts and forms a firm bond with the L-profile 1,2.

The L-profile 1,2, also called angle, is made of weldable plastic. It can be made from individual profile elements which are connected to one another in a suitable form. In this way, the individual legs 1, 2 can be produced separately and can only be joined together later, for example by inserting, welding, sewing, gluing, etc. Instead of HDPE, PP is also possible.

The at least one anchor is positively held in the concrete. For this purpose, it is designed with suitable restraint devices. In general, it has a larger dimension at least at one point in the concrete than between this point and its transition into the associated leg, in particular the joint leg 2. This provides a positive fit. Dovetails, profile ribs, profile projections or the like are suitable as projections. The anchor necessarily protrudes on the side facing the associated concrete body. The anchor is preferably coated with an adhesive bridge made of special mortar, possibly also the entire one facing the concrete body Area of the L-profile 1.2. The coating with a primer, adhesive mortar or the like causes a good connection between the L-profile 1,2 and the concrete body when pouring the concrete slabs.

The welding of adjacent L-profiles 1, 2 through inserted heating wires has proven to be particularly favorable. These heating wires can also be used for the detection of the joint. Current is sent through the heating wires, which melts the plastic material sufficiently to connect the adjacent L-profiles. This does not exclude other welding processes. In particular, ultrasonic welding, welding using a heating wedge, etc. is thought of here. The welding process should be carried out as automatically as possible to ensure a high quality of the weld, which is crucial for the tightness of the joint.

Claims (10)

Process for locating, exposing and sealing covered joints (7) on abutting plates (6), preferably concrete plates, characterized in that a) First, cross-sectionally L-shaped sealing profiles made of weldable plastic are laid on the concrete to be covered at a distance of the desired size of the concrete slabs, the adjacent, preferably approximately mirror-image sealing profiles with their, at the upper ends touch extensions (3) formed at the top, b) that the contacting, upper continuations (3) of the plastic sealing profiles are suitably connected to one another, c) that the concrete is then applied, preferably in a continuous, mechanically operated process, the sealing profiles which are now connected to one another being covered with the concrete, d) that the position of the upper edge of the interconnected continuations (3) of the sealing profiles is then detected under the concrete with a suitable detection device (9), e) that then, to the left and / or right from the detected position, the concrete again at a fixed distance (10) predetermined by the geometry of the profile is removed, as a result of which concrete slabs (6) lying next to one another have formed and that so finally f) the now exposed joint is welded and thus sealed. Process for locating, exposing and sealing covered joints (7) on abutting plates (6), preferably concrete plates, characterized in that a) that, in cross section, essentially L-shaped sealing profiles made of weldable plastic are suitably connected to one another at their contacting upper extensions (3), preferably with approximately mirror-image sealing profiles, b) that the connected sealing profiles are then laid on the surface to be covered with concrete at a distance of the desired size of the concrete slabs, c) that the concrete is then applied, preferably in a continuous, mechanically operated process, said interconnected sealing profiles being covered with the concrete, d) that the position of the upper edge of the interconnected continuations (3) of the sealing profiles is then detected under the concrete with a suitable detection device (9), e) that then, to the left and / or right of the detected position, at a fixed, given by the geometry of the profile distance (10) the concrete is removed again, so that now adjacent concrete slabs (6) have formed and that so finally f) the now exposed joint is welded and thus sealed. Method according to claim 1 or 2, characterized in that the connection of the upper continuations (3) of the plastic sealing profiles takes place by means of a seam, by means of sticking together or by means of sticking together. Method according to Claim 1, 2 or 3, characterized in that a metal detector (9) is used to detect the upper edge of the interconnected continuations (3) of the sealing profiles, which metal detector, preferably a metal strip or a metal profile, preferably on the upper edge of the interconnected upper continuations (3) of the sealing profiles and that the joint is exposed by means of a device which, starting from the detected position of the sealing profiles, separates the concrete. Sealing profile made of weldable plastic for joints between installed panels for carrying out the method according to claim 1 or 2 with an essentially L-shaped cross section with a base leg (1) and a joint leg (2), the profile on the side facing the panel at least a profile projection, preferably an anchor with adhesive bridge (4), for example fabric, which can be embedded in the associated plate (6) in a form-fitting manner, characterized in that
the profile at its upper end forms an upward continuation (3) which touches the corresponding continuation of the profile of an adjacent board. Sealing profile according to claim 5, characterized in that the upper continuation (3) of the profile (1, 2) as well as the profile itself, also L-shaped, here with its base leg approximately parallel to the surface and with its upwardly projecting leg parallel is formed to the joint. Sealing profile according to claim 5 or 6, characterized in that the profile (1, 2) on its joint leg (2) forms a projection into the joint (5) which is shaped in such a way that a profile belonging to the adjacent plate, which has a has the same projection (5), with the help of its projection (5) can engage in the other projection (5). Sealing profile according to claim 5, 6 or 7, characterized in that the profile (1, 2) has a metal strip or a metal profile on its upper continuation (3), preferably on its upper edge. Mobile device for exposing sealing joints according to the method of claim 4, characterized in that
the device has a suitable detection device, preferably a metal detector (9), which detects the position of the sealing profiles, and devices for cutting the concrete at the distance determined by the profile geometry (12), and furthermore contains control logic which the cutting or the separating device (12) is only actuated when the detection device is in position above the sealing profiles, the upper edge of the interconnected upper continuations (3), in particular above. Device according to claim 9, characterized in that the device for the separation has at least one cutting disc (12) which can be extended downwards.

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