EP2320001B1 - Device for producing a partial stop end and/or an expansion joint stop end on a concrete structure - Google Patents

Description

The invention relates to a device for producing a Teilabschalung and / or a Dehnungsfugeri shuttering on a concrete structure according to the preamble of patent claim 1.

When creating larger contiguous concrete elements or parts such as ceilings, floors in buildings or walls of eg tunnel tubes, it is often not possible to manufacture the entire element or concrete component or workpiece part in one go. The concrete component then has to be poured in several stages, whereby only individual partial areas are created. In general, it is necessary that the reinforcements of adjacent sub-areas or sub-structures overlap at least partially or be continued, so that the requirements for the statics of the entire concrete part can be met or maintained.

From the prior art, for example from the EP 1 947 256 , A Abschalplatte for Zwischenabschalungen is known in which weak points are formed, which allow a tool-free pushing through of reinforcing iron, but sufficiently prevent the passage of the liquid concrete mass. With such special Abschalplatten for concreting of subareas a secure connection to the subsequently concreted adjacent subarea is possible.
In the construction of concrete structures from several sub-areas, eg basement floors, basins in sewage treatment plants or in fresh water tanks or tunnels, there is the latent danger that at the joints of successively concreted substructures water along the Zwischenabschalungen can later penetrate the concrete slab. To avoid this, it is known to insert films made of rubber or plastic or possibly metal in the region of the joints of the subregions between the reinforcements in order to prevent the passage of water at the Stosstellen the subregions. The insertion is very complicated and, since the film is initially only half poured into the first sub-structure, care must be taken when casting the second part of construction that the film is again substantially perpendicular to the separation point. This is often carried out carelessly and thus the passage of water is not or only insufficient prevented.
The same problem also occurs when creating expansion joint shutters. In order to avoid shrinkage or expansion cracks when casting large-area concrete areas, elastic expansion means are inserted between adjoining partial areas at intervals known from experience. Again, in concrete slabs, which are unilaterally charged with water (tunnel ceilings, wastewater and fresh water tanks, etc.), problems occur due to water leakage at the expansion joints.

From the EP 2 093 339 A2 a device for holding a seal on a Abschalungsplatte is known. In this device, two U-shaped profiles which receive the upper edge of a lower intermediate shell plate and the lower edge of an upper intermediate shell plate, connected by steel bracket. A sealing plate (7), which is necessarily made of a very elastic material such as rubber, is inserted between the two U-profiles and their edge regions are supported at intervals only by the legs of the wire bracket. Practice shows that the effect of the sealing plate is effective only in the area between the back of the two mutually fitting arranged a few inches wide U-profiles and can be. In other words, the entire remaining area of the sealing plate, which runs undulating between the brackets by its own weight, is ineffective for sealing. The narrow effective area between the U-profiles does not meet today's requirements. Also, the second embodiment in D1 represents a useless solution, because between the alternately mounted top and bottom brackets the two Abschalplatten can not rest well on the sealing plate and consequently there is no sealing in these areas; the latter is only limited in Areas where the brackets are located and there just just in the contact area between the plate edge and the clip base. In the areas between the brackets there is no sealing at all.
The DE 201 18 098 U1 describes a joint tape holder, which must be bolted to the face side with the formwork panels for Zwischenabschalung between two successively cast concrete structures. The joint tape itself is - in contrast to the present invention - consequently supported only over the width or thickness of the formwork panel, for example, 20 mm. The two protruding into the concrete mass arms (4b) of the joint tape are therefore completely futile, since the water passage is interrupted only in the region of the end edges of the formwork panels by the joint tape. Such short joint seals do not meet today's requirements

An object of the present invention is now to provide an apparatus for creating a Teilabschalung and / or a expansion joint Abschalung on a concrete structure, in which the insertion of a water barrier or seal can be done in a simple, safe and cost-effective manner.

This object is achieved by a device according to the features of claim 1. Advantageous embodiments of the device are described in more detail in the dependent claims.

The device according to the invention makes it possible to apply a sealing foil or plate precisely and against even when laying the reinforcements and inserting a partial shuttering and / or when creating a expansion joint shuttering

Shift protected protected during the casting of the two sub-structures insert and hold. Inserting sealing foil / joint sealing can also be carried out safely by inexperienced persons, such as assistants. The cost of the device is very low and is more than compensated by the savings in working hours and by the security for later waterproofness.

Figur 1

einen schematischen Querschnitt durch eine Decke im Bereich zweier Teilbauten,

Figur 2

einen schematischen Querschnitt durch eine Tunnel- oder Wasserbecken-Wand,

Figur 3

eine perspektivische Darstellung der Vorrichtung nach dem Auflegen der Dichtfolie auf das untere Trägerelement,

Figur 4

eine perspektivische Darstellung der Vorrichtung vor dem Aufsetzen des zweiten Vorrichtungsteils (Trägerelement) auf die Dichtfolie,

Figur 5

eine weitere Ausgestaltung der Vorrichtung mit gekrümmter Dichtungsfolie,

Figur 6

einen Querschnitt durch die Vorrichtung mit zwei gelenkig miteinander verbundenen Trägerelementen,

Figur 7

einen perspektivischen Querschnitt durch eine Vorrichtung im Bereich einer Ecke zwischen Boden und Wand (teilweise einbetoniert),

Figur 8

ein vergrössertes Detail gemäss A in Figur 6,

Figur 9

eine weitere Ausführung des Bereichs A in Figur 6,

Figur 10

eine perspektivische Schnittdarstellung einer Dehnungsfugen-Abdichtung.

Based on illustrated embodiments, the invention will be explained in more detail. Show it

FIG. 1

a schematic cross section through a ceiling in the region of two sub-buildings,

FIG. 2

a schematic cross section through a tunnel or pool wall,

FIG. 3

a perspective view of the device after placing the sealing film on the lower support member,

FIG. 4

a perspective view of the device before placing the second device part (support member) on the sealing film,

FIG. 5

a further embodiment of the device with curved sealing film,

FIG. 6

a cross section through the device with two articulated carrier elements,

FIG. 7

a perspective cross-section through a device in the region of a corner between the floor and wall (partially embedded in concrete),

FIG. 8

an enlarged detail according to A in FIG. 6 .

FIG. 9

another embodiment of the area A in FIG. 6 .

FIG. 10

a perspective sectional view of an expansion joint seal.

In the schematic representation of a concrete ceiling 1 in FIG. 1 is the first substructure 3 on the right side and the second substructure 5 can be seen on the left side. In between is a Abschalplatte 7, comprising a lower plate member 7a and an upper plate member 7b. The two plate elements 7a, 7b are strip-shaped and have breakable weak points 9 for the passage of reinforcing bars 11. Support elements 13a and 13b are arranged between the two plate elements 7a, 7b. The carrier elements 13a, 13b are, as in the FIGS. 3 and 4 shown enlarged, in a first embodiment of the invention plates made of plastic, cement or metal, in which in the middle and parallel to the longitudinal edges extending two webs 17 are formed as holding elements. The distance D of the two webs 17 is slightly larger than the thickness d of the plate elements 7a, 7b. Instead of Webs 17 could also be provided in a line arranged pins or the like. A support member 13a can be placed in this way on the upper edge of the lower Abschalplatte 7b, which has been previously offset when laying the reinforcement. The support element 13a now forms a stable, flat bearing surface for a strip-shaped sealing film 19th

Now, the second support member 13b mirror-symmetrically placed on the sealing film 19 and, if necessary, along the edges with iron binders 21 are connected to the underlying support member 13b. For passing the iron binder 21, holes 21 are formed in the plate members 7a, 7b. The upper plate element 7b can now be inserted between the webs 17 on the upper carrier element 13b. After that, the upper reinforcing bars 11 can be passed through the weak points 9. When casting the first sub-structure 3, the liquid Concrete mass prevented by the two plate elements 7a and 7b on the horizontal passage to the second substructure 5. After casting the second substructure 5, both the plate elements 7a and 7b and the support elements 13a and 13b and the intermediate sealing film 19 are completely enclosed in the ceiling and a passage of water, whether from below or from above, can at the junction the two sub-structures 3.5 do not take place.

Analogously to a ceiling 1, the connection between two wall sections 23a and 23b, for example in an aqueous enclosure, a water reservoir or a tunnel wall, ie between two vertical substructures, can be sealed ( FIG. 2 ).

As an alternative to a planar design of the plates on the carrier elements 13a and 13b, these can also be V-shaped (see FIG. 5 ).
Instead of plate-shaped support elements 13a, 13b, wire meshes can be used (cf. Figures 6-9 ). The wire-like structure carrier elements 13a and 13b are articulated along each one longitudinal edge, for example, by rings 25 made of wire, connected to each other. The rings 25 make it possible, after placing the lower support member 13a on the plate member 7a and the laying of the band-shaped sealing foil 19, the second carrier element 13b in the direction of the arrow P reposition (see FIG. 6 right side). Subsequently, the upper plate member 7b, 15 are inserted between the webs 17. This embodiment further simplifies the laying of the sealing film 19 over the prior art.

In order to position the lower plate member 7a on the slab formwork 27 in a simple manner and to be able to hold, a headband 29 with one or more nails 31 by a protruding from the plate member 7a Arming element 33 passed from below and held by a formed on the vertical leg of the retaining clip 11 nose 35 ( FIG. 8 ). If no reinforcing element 33 is present on the plate element 7a, then a tab 37 embracing the plate element 7a can be arranged at the upper end of the holding clip 29 ( FIG. 9 ). In order to use the same headband 29 for different height plate elements 7a, the lower leg of the retaining clip 29 may be formed arcuate and fixed by two adjacent nails 31 on the formwork 27 (not shown).

In the figure according to FIG. 7 the carrier elements 13a, 13b are interconnected at a right angle at the point X. In this way, when casting a concrete pavement 1, a watertight connection to the wall 39 to be created later can be produced. The lying below in the concrete ceiling 1 next support elements 13a and the outside to be placed in the wall 39 support members 13a can be firmly connected. The two support elements 13b coming inside can be placed individually or also connected to the underlying support elements 13a along one edge in an articulated manner. The band-shaped sealing foil 19 is bent before the casting of the concrete ceiling 1 at the point X and along the vertically extending leg of the upwardly running support member 13 a attached to this ( FIG. 7 ).

With a similarly trained element, the connection of the wall 39 can be made to the coming to about 1 ceiling (no figure).

In the same way as band-shaped sealing foils 19 are inserted into concrete slabs 1 and walls 39, also expansion joint Abschalungen in concrete ceilings 1 and walls 39 can be positioned. FIG. 10 shows instead of the plate elements 7a, 7b for the shuttering of the first substructure 3 to the second substructure 5 now elastic plates 41 from eg Pavatex, EPS and others, which allow the extension of the two substructures 1 and 2. The band-shaped sealing foil 19 ', which is also necessary in this application, has in its center a cavity, in this case a hexagonal cavity 43, which can absorb tensile and compressive movements between the two substructures 3.5 without damage. The band-shaped sealing foil 19 'is held in position in this embodiment of support members 13a and 13b during the casting of the ceiling 1 in position. In the example of the support elements 13a, 13b according to FIG. 10 the latter are hinged together at one edge by rings 25 and consist of sheet metal 45 or wire mesh (not shown), which are provided with recesses 47 for optimal embedding in the liquid concrete. Through the recesses 47 For example, the liquid concrete can come in intimate contact with the band-shaped sealing foil 19 and thus prevent the creeping of water along the sealing foil 19 '.
The expansion plate 41 can of course be rotated by 90 °, used in walls 39.

The support elements 13a and 13b may extend over the entire width or length of the abutting substructures 3,5. However, it is also conceivable to form the carrier elements 13a, 13b as short sections and to set them apart from one another on the edges of the plate elements 7a, 7b. Of course, while the sealing film 19 must be performed over the entire length of the joints.

Claims (6)

1. A device for producing a partial stop end and/or an expansion joint stop end on a concrete structure (1) with plate elements (7a, 7b) for the temporary limitation of the first partial structure (3) during the casting and hardening of the liquid concrete and with a sealing element made from a band-shaped or strip-shaped sealing foil (19, 19') for ensuring water tightness in the region of the abutting partial structures (3, 5) which are cast one after the other,
   comprising
   two support elements (13a, 13b), on which, on one of the two surfaces, two webs (17) are formed as holding elements or pins are provided arranged in a line which are designed to connect the support elements (13a, 13b) to a longitudinal edge of the plate elements (7a, 7b) or a plate (15) or an expansion plate (41), characterised in that the support elements (13a, 13b) comprise plates made of plastic, cement material or metal on which, running centrally and parallel to the longitudinal edges thereof, the two webs (17) are formed as holding elements or the pins are provided arranged in a line, and in that the support elements (13a, 13b) extend over the whole width of the concrete structure.
2. The device according to claim 1, characterised in that both support elements (13a, 13b) form a planar bearing surface for the strip-shaped or band-shaped sealing foil (19, 19').
3. The device according to claim 2, characterised in that the two support elements (13a, 13b) are connected securely or by articulation to one another by connecting means (21, 25).
4. The device according to claim 3, characterised in that iron binders (21) or rings (25) are used as the connecting means.
5. The device according to any one of claims 1 to 4, characterised in that the support elements (13a, 13b) are designed as grid bodies.
6. The device according to any one of claims 1 to 5, characterised in that the sealing element (19, 19'), between its two longitudinal edges, has a hollow chamber (43) to compensate for movement of the two partial structures (3, 5).

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