EP3988268A1 - Manufacturing system for building components with hollow chamber - Google Patents

Abstract

The invention relates to a method for producing a cavity (201), e.g. a coupling or storage or drainage channel chamber, in a component (200) which is made of concrete or some other hardenable building material. The invention also relates to a recessed hollow body (120) and/or an assembly and/or recessed strip (110) as a tool for carrying out the method. The invention also relates to a tool set (100) and/or an arrangement with a recess tube (120) or another recess hollow body (120) and with a mounting and/or recess strip (110) for carrying out the method. Finally, the invention relates to the use of a pipe (120), flexible hose (130) or other hollow body to produce a cavity (201), e.g other curable building material is formed.

Description

• ein Verfahren zum Herstellen eines Hohlraums, z.B. einer Verkopplungs- oder Speicher- oder Abflussrinnen-Kammer, in einem Bauteil, welches mit Beton oder einem sonstigem, aushärtbaren Baustoff gebildet ist,
• einen Aussparungs-Hohlkörper, insbesondere Aussparungs-Rohr, als Werkzeug für die Durchführung des genannten Herstellungsverfahrens,
• eine Montage- und/oder Aussparungsleiste als Werkzeug zur Durchführung des genannten Herstellungsverfahrens,
• ein Werkzeugset zur Durchführung des genannten Herstellungsverfahrens,
• eine Anordnung mit einem Aussparungs-Rohr oder einem sonstigen Aussparungs-Hohlkörper und mit einer Montage- und/oder Aussparungsleiste zur Durchführung des genannten Herstellungsverfahrens,
• eine Verwendung eines Rohres, flexiblen Schlauches oder sonstigen Hohlkörpers im genannten Herstellungsverfahren.

The invention concerns:

• a method for producing a cavity, e.g. a coupling or storage or drainage channel chamber, in a component which is formed with concrete or another hardenable building material,
• a cavity body, in particular a tube, as a tool for carrying out the manufacturing process mentioned,
• an assembly and/or recess strip as a tool for carrying out the manufacturing process mentioned,
• a tool set for carrying out the said manufacturing process,
• an arrangement with a recess tube or another recess hollow body and with a mounting and/or recess strip for carrying out the mentioned manufacturing method,
• a use of a pipe, flexible hose or other hollow body in said manufacturing process.

Precast concrete components are prepared in precast concrete works for use on construction sites. The prepared precast concrete parts still have to be connected to one another on the construction site. For this purpose, appropriate connection connections are already cast into the concrete element during the manufacture of the precast concrete parts, for example concrete loops. During the pouring and curing of the concrete, the concrete loops are often stored in so-called storage boxes. Storage boxes are sheet metal boxes that are mounted in the area of the formwork wall to form the concrete elements. A section of a concrete loop integrated into the storage boxes is cast into the concrete part during concreting. A second section of the concrete loop remains in a cavity created by the storage box, which is left out during concreting. After curing, the section of the concrete loop left out in the cavity is in place available to connect them in a connecting joint, e.g. with a concrete loop of another concrete element. The area can then be filled with grout or another hardenable building material.

In the DE 102 28 082 A1 a storage box is shown with a cross-sectional profile of an isosceles trapezoid, with the narrow side of the trapezoid facing the formwork wall. In addition, the storage box is anchored in the concrete by edges or webs. The disadvantage of storage boxes is that they remain in the concrete part and cannot be reused.

Other options for connecting components are known from the prior art. In the DD 262 259 A1 For example, general-purpose components with a C-shaped cross-section and a potting pocket with a C-shaped cross-section are combined into supports. Two opposite potting pockets can be arranged using cross connectors. The grouting pockets and core cross-section can then be filled with concrete, mortar or another binding material.

the US 2016/0 123 004 A1 relates to building blocks made of concrete that have grouting pockets with undercuts for connection to other concrete building blocks. Two adjacent potting pockets together enclose a potting channel with an hourglass-shaped cross-section. A peg that is form-fittingly adapted to this casting channel is pushed into the casting channel to connect and align the building blocks.

In the DE 100 19 502 A1 For an insulated brick wall, several bricks are combined into two brick wall shells, with insulation placed between the brick wall shells. For this purpose, each brick has a pocket, with two grouting pockets enclosing a chamber that accommodates a projection of an insulating layer that can be filled with grouting mortar. Reinforcing bars can be cast into the casting chamber, which protrude at the ends and can be used as a transport aid. The casting chambers with undercuts are formed by combining two adjacent bricks.

A further problem in the prior art is that concrete parts for drainage devices for draining rainwater are expensive and require intensive maintenance and cleaning. the DE 10 2017 213 618 A1 relates to a drainage device for draining rainwater with a channel body made of concrete (slot channel) with a plastic insert. The insert is designed for cleaning purposes. The watercourse is made of concrete along the body of the channel.

The invention is based on the object of improving the prior art and creating a way of producing a cavity, preferably with undercuts, in a concrete or building material component using one or more tools or aids that can be removed after production of the cavity characterized by reusability for the production of another cavity.

The solution is the manufacturing method specified in claim 1, the recess hollow body specified in claim 6 as a tool for carrying out the manufacturing process, the assembly and/or recess strip specified in claim 7 also as a tool for carrying out the manufacturing process, the tool set specified in claim 9 proposed for carrying out the production method, the arrangement specified in claim 10 for carrying out the production method and the use of a hollow body specified in claim 14 for producing a cavity in a building material component. Optional refinements of the invention result from the dependent claims.

An optional further development of the manufacturing method according to the invention is that after the building material has hardened, the hollow body with the recess is changed further in terms of its diameter or its other extension in order to enable the hollow body with the recess to be detached from the inner wall of the cavity. This opens up the advantage of reusability of the recess hollow body as a formwork tool: After the building material has set and solidified, this formwork tool is reduced in its diameter or its other extent. The hollow body the formwork tool can then be removed from the cavity or the component without being destroyed and used again for the next production process.

Another optional development of the manufacturing method according to the invention is that the diameter of the hollow body or its other extension is changed by changing the width of an axis-parallel longitudinal slot that penetrates the wall of the hollow body. The width of the longitudinal slot can expediently be dimensioned or adjusted by inserting one or more wedge-shaped elements into the longitudinal slot. The narrow or pointed or sharp edge of the wedge-shaped element and its increasing widening or widening, which is characteristic of the wedge shape, facilitates the insertion of the wedge-shaped elements into the initially narrow longitudinal slot.

A widening of the longitudinal slit and thus its change, dimensioning or adaptation can also be brought about by inserting an inner expandable tube or other inner expandable hollow body into the recessed hollow body. A further specification of this variant of the method consists in first pouring in the two hollow bodies mentioned, which are preferably arranged concentrically/coaxially one inside the other, with fresh concrete which is still hardenable in order to form the component with the hollow space; After the fresh concrete has set or hardened, a further, optional manufacturing step is to pull the widening inner pipe or the inner hollow body out of the recessed hollow body, which is easily possible when producing the two concentrically nested hollow bodies with smooth plastic surfaces. With the pulling out of the widening inner tube, the recess tube or the other recess hollow body relaxes again after it had previously been subjected to a prestress when the widening inner tube was pushed in. With the release of this prestress, the recess tube can also be loosened or pulled out of the concrete component or its cavity. The cavity can either be sealed with concrete or used for other components such as ventilation ducts of air conditioning systems. An advantage achieved is that the existing in prior art formwork systems need formwork threaded rods with a To surround each plastic pipe to protect against concrete, omitted in the present invention, and no longer have to remain plastic pipes in the component.

According to a further, optional development, the hollow body with recess is placed or fastened in the formwork or on a wall of the formwork indirectly via or together with a mounting and/or recess strip. In particular, for this purpose the recess hollow body is inserted or placed in or on the assembly and/or recess strip and/or tied to it or otherwise fixed or attached.

According to an optional embodiment of the invention, the wedge-shaped element or elements mentioned above are realized as a projection or projections of the mounting and/or recess strip, and this or these wedge-like projections cause the diameter or other extent of the recess hollow body to be changed. The diameter of the recess hollow body thus widened under tension is attached to the strip, for example by means of cable ties. After the building material, in particular concrete, has hardened, the side of the formwork with the strip with the wedge element sitting on it is removed.

A prestressing of the recessed hollow body can advantageously be set by dimensioning the thickness or width of the at least partially wedge-like projection(s).

According to a further, optional embodiment of the invention, the slot width of the hollow body is changed by means of a flexible expansion hose that can be filled with pressure medium by inserting it into an opening of the slotted tube or hollow body and filling it with pressure medium or is emptied thereof, with a change in the recess hollow body in its diameter or in its other extent.

In an optional development of the invention, the recess hollow body is expediently attached to the mounting strip and/or recess strip using cable ties or other strand-like fastening means.

According to a further optional embodiment of the invention, the recess hollow body is sprayed or provided with a separating agent on its outer surface before it is placed or fastened in or on the formwork or before the building material is introduced into the formwork in order to avoid adhesion to or a material connection with the building material . Another use of release agents is known per se in precast concrete plants.

According to another optional development of the invention, the hollow body with the recess is compressed or reduced in its diameter or in its other extent, for example by means of cable ties. In a subsequent work phase or at the end of the manufacturing process, the resulting prestress can contribute to the hollow body, which is trying to relax again, coming into stable contact with the surrounding concrete or building material mass.

An expedient, optional embodiment of the invention consists in that a longitudinal strip is cut out or otherwise removed from the wall of the hollow body to form the longitudinal slot. In this case, a prestressing of the recess hollow body that has arisen after the hardening of the building material is set or dimensioned via the width of the longitudinal slot.

For the hollow body within the scope of the invention, in particular the hollow tube, as a tool for carrying out the above-mentioned method according to the invention, an optional development of the longitudinal slot consists in the two opposite slot edges engaging or being able to be brought into engagement with one another, preferably by force - and/or form-fitting. This can be specified in such a way that the longitudinal slit is designed as an overlapping longitudinal slit in that the two opposing slit edges lie on top of one another or overlap one another in the circumferential direction. They thus form an overlapping or covering area, which can prevent undesired particles, for example dirt, from entering the interior of the slotted tube. A further expedient development of this idea is that at least one of these slot edges is designed with a stop shoulder formed by a gradation, on which the other opposite slot edge hits or can hit, is supported there and optionally rests or can rest with a form fit.

In principle, it is expedient to design the recessed hollow body, in particular the recessed tube, to be elastically and reversibly deformable and/or to produce it with plastic.

For the assembly and/or cut-out strip within the scope of the invention, an optional variant consists of a channel or other recess on the outside of the strip or a strip jacket, which is preferably rounded in cross-section and/or preferably elongated, with the recess being designed for at least partial Recording and / or for holding a recess hollow body.

According to a further optional variant, the mounting and/or recess strip is characterized by one or more elongated or axially parallel projections, preferably with a basic shape that is at least partially wedge-shaped when viewed in cross section, with the respective projection being designed to pass through the longitudinal slot of the recess tube or other recess hollow body. According to an optional development, the assembly and/or recess strip is provided with one or more fixing elements for mechanical and/or magnetic fixing to the formwork wall on one side or in an area that is assigned to a formwork wall. Another, optional development of the mounting and/or recess strip is characterized by one or more transverse grooves running transversely to the longitudinal direction of the strip for inserting strand-like fastening means, for example cable ties, for fastening the recess hollow body (on the mounting and/or recess strip ).

For the tool set within the scope of the invention, there is an optional supplement in one or more cable ties or other strand-like means for looping and/or for holding and/or fastening the recessed hollow body to the mounting and/or recessed strip.

If the recess tube and/or the recess hollow body is/are provided with at least one open end, in an advantageous development of the invention the tool set can be supplemented with an expansion hose that can be filled with pressure medium and/or with a widening inner tube or with another widening body, in particular widening inner hollow body, for insertion into the slotted recess tube or the slotted recess hollow body.

After removing the formwork and the slit or recess tube, and after the concrete of the manufactured component has set, openings remain in the component, the closure of which is desirable. It is an advantage if these breakthroughs or openings are as circular as possible. Then conical plugs with O-rings or the like could be pressed into it for sealing.

This need is taken into account with an optional embodiment for an expansion body as follows: The expansion body is designed as a multi-point support body, which is characterized in that it is distributed at several discrete points or locations, which are preferably distributed evenly over the circumference of the pipe or hollow body , presses against the inner wall of the recess hollow body. Advantageously, the multi-point support body is based on a polygonal or star-like basic shape, in which the corner points or star points are convexly rounded or curved outwards for contact with a pipe inner wall with reduced pressure load for the purpose of form-fitting contact with a concave or inwardly curved pipe -inner wall. With a symmetrical design of the polygonal or star-like basic shape with respect to a center of symmetry, a largely circular widening of the recess tube or recess body can be achieved.

For the arrangement within the scope of the invention with a recess tube or other recess hollow body and with a mounting and/or recess bar, there is an optional development in that in the recess tube or in the other recess hollow body a Pressure medium fillable, flexible expansion hose or other having-hollow body is introduced.

Another optional embodiment of the arrangement according to the invention with recess-hollow body and assembly and / or recess bar is that an axially parallel longitudinal slot of the recess tube or other recess hollow body is penetrated by an elongated or axially parallel, preferably at least partially wedge-shaped and/or sword-like projection of the mounting and/or recess strip.

A further, optional variant of the arrangement according to the invention consists in the recess hollow body lying against the mounting and/or recess strip extending further than said strip and/or protruding beyond the latter, in particular transversely to the longitudinal direction of the strip. This allows the advantageous effect of creating undercuts, for example in relation to an entry/exit gap of the cavity. The undercuts serve to engage and anchor the anchoring of coupling means, for example double-headed anchors, which are guided through the entry/exit gap of the cavity.

In the case of the use within the scope of the invention, an optional further development consists in the pipe used or another hollow body used being provided with a longitudinal slot parallel to the axis.

Fig. 1a-d

jeweils in schematischer Stirnansicht die Anordnungen für vier aufeinanderfolgende Herstellungsschritte eines beispielhaften Herstellungswegs zur Bildung eines Hohlraums in einem Beton-Bauteil unter Verwendung eines erfindungsgemäßen Werkzeugsets,

Figur 2a-d

jeweils in schematischer Stirnansicht die Anordnungen für vier aufeinanderfolgende Herstellungsschritte eines alternativen Herstellungswegs zur Bildung eines Hohlraums in einem Beton-Bauteil mit einem alternativen Werkzeugset,

Fig. 3 a-d

jeweils in schematischer Stirnansicht die Anordnungen für vier Herstellungsschritte eines weiteren alternativen Herstellungswegs zur Bildung eines Hohlraums in einem Beton-Bauteil mit einem weiteren, alternativen Werkzeugset,

Fig. 4

in einer perspektivischen Stirnansicht ein Beton-Bauteil mit erfindungsgemäß gebildetem Hohlraum,

Figur 5

in einer perspektivischen Längsansicht ein Beton-Bauteil mit erfindungsgemäß gebildetem Hohlraum und angebrachten Kopplungsmitteln,

Figur 6

in einer perspektivischen Längsansicht ein Beton-Bauteil mit erfindungsgemäß hergestelltem Hohlraum und daran zur Illustration aneinandergereihten Kopplungsmitteln

Figur 7

in einer Stirnansicht eine erfindungsgemäße Anordnung eines erfindungsgemäßen Werkzeugsets mit einem Aussparungsrohr und mit einer Montage- und/oder Aussparungsleiste,

Figur 8

in einer Stirnansicht eine weitere erfindungsgemäße Anordnung eines weiteren erfindungsgemäßen Werkzeugsets mit einem Aussparungsrohr und mit einer Montage- und/oder Aussparungsleiste,

Figur 9

die Anordnung gemäß Figur 8 in einer Längsseitenansicht,

Figur 10

in einer perspektivischen Stirnansicht die Anordnung gemäß Figur 8, eingebettet in die Betonmasse eines Beton-Bauteils mit erfindungsgemäß gebildeten Hohlraum,

Figur 11

in einer perspektivischen Stirnansicht ein Beton-Bauteil mit erfindungsgemäß hergestelltem Hohlraum und eingesteckter Montage- und/oder Aussparungsleiste,

Figur 12

in einer Stirnansicht ein Beton-Bauteil mit erfindungsgemäß hergestelltem Hohlraum und darin befindlichem Schlitzrohr,

Figur 13

in einer perspektivischen Stirnansicht das Schlitzrohr, angeordnet auf/mit einer Montage- und/oder Aussparungsleiste,

Figur 14

in einer perspektivischen Draufsicht einen mäanderartig verlaufend abgelegten, flexiblen Druckschlauch als Werkzeug oder Mittel zur Durchführung des erfindungsgemäßen Verfahrens,

Figur 15

in einer perspektivischen Stirnansicht eine Anordnung mit einem Schlitzrohr als Aussparungs-Hohlkörper und einem darin zur Spreizung des Hohlkörpers bzw. Schlitzes eingeführten Aufweit-Innenrohr,

Figur 16

in einer perspektivischen Stirnansicht ein Aussparungsrohr mit einem variierten Längsschlitz,

Figur 17

in perspektivischer Stirnansicht eine Anordnung mit einem Aussparungsrohr und einem darin zu dessen Spreizung eingeführten Dreipunkt-Auflagekörper,

Figur 18

in einer perspektivischen Ansicht eine erfindungsgemäß hergestellte Abflussrinnenkammer mit gestrichelt angedeutetem AussparungsRohr

Further details, features, feature (sub)combinations, advantages and effects on the basis of the invention result from the following description of preferred embodiments of the invention and the drawings. These show in

Fig. 1a-d

in each case in a schematic front view the arrangements for four successive production steps of an exemplary production route for forming a cavity in a concrete component using a tool set according to the invention,

Figure 2a-d

in each case in a schematic end view the arrangements for four consecutive production steps of an alternative production route for forming a cavity in a concrete component with an alternative tool set,

Fig. 3 ad

each in a schematic front view the arrangements for four production steps of a further alternative production method for forming a cavity in a concrete component with a further, alternative tool set,

4

in a perspective front view a concrete component with a cavity formed according to the invention,

figure 5

in a perspective longitudinal view, a concrete component with a cavity formed according to the invention and attached coupling means,

figure 6

in a perspective longitudinal view, a concrete component with a cavity produced according to the invention and coupling means lined up thereon for illustration

figure 7

in a front view an arrangement according to the invention of a tool set according to the invention with a recess tube and with a mounting and/or recess strip,

figure 8

in a front view a further arrangement according to the invention of a further tool set according to the invention with a recess tube and with a mounting and/or recess strip,

figure 9

the arrangement according to figure 8 in a long side view,

figure 10

in a perspective front view the arrangement according to figure 8 , embedded in the concrete mass of a concrete component with a cavity formed according to the invention,

figure 11

in a perspective end view, a concrete component with a cavity produced according to the invention and an inserted mounting and/or recess strip,

figure 12

in a front view a concrete component with a cavity produced according to the invention and a slotted pipe located therein,

figure 13

in a perspective end view of the slotted tube, arranged on/with a mounting and/or recess strip,

figure 14

in a perspective top view, a meandering laid, flexible pressure hose as a tool or means for carrying out the method according to the invention,

figure 15

in a perspective end view, an arrangement with a slotted tube as a recess hollow body and an expanding inner tube inserted therein to spread the hollow body or slot,

figure 16

in a perspective end view, a recess tube with a varied longitudinal slot,

figure 17

in a perspective front view an arrangement with a recess tube and a three-point support body inserted therein to spread it,

figure 18

in a perspective view, a discharge channel chamber produced according to the invention with a recess tube indicated by dashed lines

The figures are merely of an exemplary nature and serve only to understand the invention. The same elements are provided with the same reference numbers.

According to Fig. 1a a tool set 100 according to the invention or an arrangement according to the invention comprises a mounting and/or cut-out strip 110 with a channel 112 designed as a depression, which extends on a longitudinal side of the strip. In end view, the ledge has an outline which corresponds to or is at least similar to an isosceles or symmetrical trapezium. The two same oblique isosceles longitudinal sides 113 of the strip 110, which are bent or converging towards one another, result in a conically tapering shape when viewed from the front.

Further includes according to Fig. 1a the tool set 100 or the invention Arrangement a slotted and elastically-reversibly deformable recess tube 120 with an initial diameter D1. The outer jacket 121 of the recess tube 120 can be sprayed with a release agent to avoid adhesion to the surrounding concrete. The outer shell 121 is penetrated by a longitudinal slot 122, which extends parallel to the central longitudinal axis of the pipe over the entire length of the pipe (perpendicular to the plane of the drawing Fig. 1a ). In the channel 112 of the strip 110, the recess tube 120 according to the example shown is inserted and turned in such a way that the longitudinal slot 122 of the channel 112 is preferably opposite the deepest area of the channel 112.

Further includes according to Fig. 1a the tool set 100 has a flexible expansion tube 130 that can be filled with pressure medium, which in the arrangement shown is inserted into the recess tube 120 and is still in the pressureless or slack state.

According to Fig. 1b Another manufacturing step is that the expansion tube 130 is now filled with pressure medium, for example air or water, in such a way that the expansion tube 130 is elastically expanded. At the same time, this comes to rest against the inner wall of the slotted recess tube 120 and presses and spreads it open to a slot width SB via its longitudinal slot 122, which widens in the process. This is accompanied by an expansion of the recess tube 120 to an enlarged expansion diameter D2. According to the exemplary embodiment shown, the assembly and/or recess strip 110 is fixed to a formwork 300 (not shown in more detail) with the recess tube 120 placed on it. In the further course of the method, this arrangement is surrounded within a formwork 300 with free-flowing fresh concrete that can still be shaped and hardened, the pressure within the expansion hose 130 still being maintained.

In the further manufacturing process according to 1c pressure medium has been caused to escape from the expansion hose 130, so that the expansion hose 130 is (back) placed in a slack, pressureless state. As a result, the elastically reversible recess tube 120 can be narrowed by its longitudinal slot 122 occurring due to a lack of pressure being exerted from the inside resume earlier, smaller initial diameter D1, ie back to its original state according to Figure 1a shrink. This shrinkage results in a distance between the recess tube 120 and the inner wall 202 of the cavity 201 previously created by the recess tube 21 within the hardened concrete component 200. Because of this distance, it is possible to remove the recess tube 120 from the component 200 largely without frictional resistance remove. The same applies to the mounting and/or recess strip 110, which is particularly important due to its isosceles long sides 113 running apart towards the outside of the component 200 (see also Fig. 1a ) is promoted: In the course of pouring or embedding in concrete, these form an entry/exit gap 203 that narrows conically towards the interior of component 200 at least make their removal easier.

In the manufacturing phase according to Fig. 1d Once the assembly and/or recess strip 110, recess tube 120 and expansion hose 130 of the tool set 100 according to the invention have been removed from the freshly formed component 200 made of hardened concrete, the cavity 201 formed by means of the strip and the tube with the conical or wedge-like entry/exit gap 203. The arrangement and combination of recess strip 110 and recess tube 120 resting on it, which with its maximum cross-sectional extent projects beyond its bearing surface on the cross-sectionally tapered strip 110 in width, result on the cavity inner wall 202 through Corners 204 delimited undercuts 205 which allow engagement and re-anchoring of means for coupling or connecting, such as double-headed anchors, to another structural member.

The embodiment according to Figures 2a-2d differs from the after Figures 1a-1d in that the mounting and/or recess strip 110 used has a sword-like projection 111 which, in the arrangement according to the invention, is inserted through the longitudinal slot 122 into the slotted tube or recess tube 120. The longitudinal slot 122 is spread open according to the width B of the projection 111, so that the width B corresponds to the slot width SB.

This is accompanied by an expansion of the recess tube 120, which in this case assumes an enlarged expansion diameter D2.

According to Figure 2b the arrangement of recess tube 120 or slotted tube and mounting and/or recess strip 110 inserted therein with its projection 111 is filled with hardenable fresh concrete to form the concrete component 200 with cavity 201 (see Figures 2c and 2d ) surround. Then according to Figure 2c the assembly and/or cut-out strip 110 is detached from the cut-out tube 120, with the projection 111 of the strip 110 being pulled out of the interior 124 of the cut-out tube 120. This is accompanied by a shrinking of the previously expanded recess tube 120, taking on the smaller initial diameter D1, so that it detaches from the cavity inner wall 202 of the concrete component 200 and can be removed from the cavity 201 formed.

Incidentally, the above statements apply Figures 1a-1d referenced, which apply accordingly.

The embodiment according to Figures 3a-3d differs from the after Figures 2a-2d characterized in that the initial slot width SB1 of the longitudinal slot 122 of the recess tube 120 is greater than the cross-sectional width B of the bar projection 111, that the latter according to Figure 3a with play within the clear width of the longitudinal slot 122 is located. According to Figure 3b the recess tube 120 is reduced in its transverse extent to the smaller shrink diameter D3, for example by means of cable ties or the like (not shown), with a correspondingly reduced, smaller slot width SB2 resulting for the longitudinal slot 122. According to Figure 3c In a further process step, the arrangement of recess tube 120 and strip 110 with the projection 111 inserted in the recess tube 120 is cast or surrounded with hardenable fresh concrete, with the smaller slot width SB2 being essentially retained by the projection 111 still inserted. The same applies to the shrink diameter D3. According to Figure 3d When the fresh concrete that has been cast around has hardened in the further course of the process, and the strip 110 together with its projection 111 are detached from the recess tube 120 and removed from the cone-like entry/exit gap 203 of the concrete component 200 . The recess tube 120, especially if it is made of plastic, for example, with a smooth inner surface, can suitably remain in the cavity 201 of the concrete component 200 as an additional insert or inner lining if the concrete component according to FIG Figure 3d to be used as a drainage channel chamber. If the recess tube 120 is designed to be reversibly elastic, it will tend to press against the inner wall 202 of the cavity due to its prestress, caused in particular by the previous reduction to the smaller shrinkage diameter D3, and to adhere to it with a force or frictional connection . The use of the recess pipe 120 as an inner insert or inner lining for a drainage channel chamber has the advantage that the naturally smooth inner surface of the pipe, particularly in the case of plastic, promotes smooth drainage of dirty water or the like. The dirty water can get into the interior of the recess tube 120 or the plastic inner lining formed with it via the longitudinal slot 122 that is present anyway according to the invention, and then flow on. The recess pipe 120 can thus be a smooth inner liner for a concrete trough chamber.

Incidentally, the above statements apply Figures 1a-1d referenced, which apply accordingly. In particular, the corners 204 and the adjoining undercut areas 205 are also formed in the hardened concrete component 200, which contribute to the reliable holding of the recess tube 120, for example as an insert or inner lining in the cavity 201 of the component 200 as a concrete drainage channel chamber.

In figure 4 When the finished concrete component 200 with the coupling cavity 201 and entry/exit gap 203 is clearly visible on the front side, the undercuts 205 are also visible, which connect to the entry/exit gap 203 and contain a support for back-anchoring of coupling means as in figure 5 form shown. In the specific embodiment of the figure 5 these coupling means are implemented as double-headed anchors 150, which, with the first of the respective two heads, are inserted into the cavity 201 through its in figure 4 shown, frontal opening have been introduced. The remaining heads of the double-headed anchors 150 protruding through the entry/exit gap 203 can then engage in a coupling hollow chamber of a similar concrete component to be connected for back-anchoring.

In figure 6 is a (partial) selection of various coupling agents, including Double-headed anchor 150, shown, which can be used in connection with coupling chambers of two similar concrete components produced according to the invention for their permanent, statically functional connection.

figure 7 shows an arrangement according to the invention with a recess tube 120 and a support and/or recess strip 110, with a longitudinal projection 111 of the strip 110 extending over the length of the strip 110 being inserted through the longitudinal slot 122 of the recess tube 120 for spreading and prestressing the recess tube 120. The free end area of the elongate projection 111 ends via a tapering area in a longitudinal edge which still maintains a distance from the wall 123 of the recess tube 120 .

The front view according to figure 9 shows a modified arrangement with a support and/or recess strip 110. The modification opposite figure 7 is that the projection 111 of the strip 110 penetrates the interior of the recess tube 120 diametrically, with an edge formed by tapering at the upper end of the longitudinal projection 111 lying directly against the inner wall of the recess tube 120. For fixing to a formwork 300 , which is ferromagnetic in the example, the strip 110 is provided with, for example, embedded magnetic elements 115 in a support or contact foot area 114 associated with the formwork 300 . Alternatively or additionally, mechanical fasteners such as screws or nails can also be used, particularly if the formwork 300 is made of wood.

In the figure 9 is the arrangement according to figure 8 shown in a longitudinal side view. In a region adjoining the recess tube 120 , the strip 110 is penetrated in its transverse direction by a plurality of transverse grooves, through which cable ties 140 are guided and wound around the recess tube 120 in order to fix it to the strip 110 .

In figure 10 shows how the arrangement according to the invention of recess tube 120 and mounting and/or recess strip 110 inserted therein is embedded in the cavity 201 of a concrete component 200 produced according to the invention after it has hardened.

Because of the Figures 11 and 12 reference is made to the reference numerals therein, the following list of reference numerals and the description above Figure 2b or 2c. the figure 11 corresponds to a manufacturing phase following Figure 2b . the figure 12 corresponds to a manufacturing phase after Figure 2c .

Because of the figure 13 reference is made to the reference numerals therein, the following list of reference numerals and the description above Figure 1a referred.

With figure 14 is an example for the realization of the re Figures 1a-1d addressed expansion tube 130 illustrates. A conventional, preferably flexible hose, in particular a slack fire department hose, can then be used to widen the slotted recess tube 120 . In addition, within the scope of the invention, such a hose can be used alone as an elongated, flexible recess hollow body to form the cavity 201 as a coupling or storage or drainage chamber in the concrete component 200 .

According to figure 15 In one variant of the invention, to widen the slotted recess tube 120, instead of using compressed air or a sword projection of a mounting strip, another tube, for example of approximately the same thickness, is pushed into the slotted recess tube 120 as the expanding inner tube 131, which is then widened or spread open and is put under tension. The result is a correspondingly expanded slot width SB of the longitudinal slot 122 of the recess tube 120. In the further course of the manufacturing process, the prestressed, slotted recess tube 120 with the inner expansion tube 131 located therein is cast inside a formwork with fresh concrete to form the component 200. After the fresh concrete has set or hardened, the arrangement of recess tube 120 and inner tube 131 inserted therein can be removed from the concrete component by first pulling out the inner tube 131 . The diameter of the recess tube 120 then decreases with the release of its previously assumed prestress, and the recess tube can detach from the concrete and can also be removed from the concrete component. The remaining cavity in the concrete component can be used, for example, to accommodate supply lines or to form ventilation ducts for air conditioning systems.

The cavity in the concrete component can also be sealed with concrete.

In figure 16 shows the special variant of a slotted or recessed tube 120 according to the invention with an overlapping slot 122a. In this case, the two opposite slot edges 122b, 122c lie at least partially one above the other in the circumferential direction of the pipe, thus forming an overlapping area within which dirt particles from a certain minimum size can no longer get between the two overlapping slot edges into the pipe interior. For example, according to figure 16 a slot edge 122b can be provided with a stop 122d, which is formed by means of a stepped profile. The stop 122d provides a contact surface for the longitudinal side of the opposite slot edge 122c, which the latter can impact or abut and bear against. Despite the aforementioned prevention of dirt from penetrating into the interior of the pipe, the expansion and pretensioning of the open-seam pipe 120 by means of an expansion body pushed in on the inside is still possible.

According to figure 17 the recess tube 120 with an overlapping slot 122a or other longitudinal slot is widened from the inside by a three-point support body 132 inserted on the inside, with the overlapping slot 122a being able to be spread open if the three-point support body 132 is dimensioned accordingly. This has three support humps 134, each of which extends radially in a star shape, preferably uniformly or symmetrically, from a central bore 133 and is rounded or convexly curved at its ends in such a way that they positively rest against the concave inner wall of the recess tube 120 and can press against it .

figure 18 shows an arrangement according to Figure 3d . The recess tube 120 (suggestedly sketched in dashed lines) has remained in the cavity 201 of the concrete component 200 expediently as an additional insert or inner lining. For use as a gutter chamber, the concrete member has slot-like openings (not shown) that align with slot 122 of recess tube 120, allowing rainwater or other foul water to flow through slot in concrete member 200 and through slot 122 in the tube 122 in the drainage channel chamber, so get into the cavity 201 of the concrete component 200 can. In other words, the dirty water can get into the interior of the recess tube 120 or the plastic inner lining formed with it via the longitudinal slot 122 that is present anyway according to the invention and can then flow on. The pipe 120 is held in the concrete component 200 by force or frictional engagement.

Reference List

100

tool set

110

Mounting and/or recess strip

111

head Start

112

elongated groove or other deepening

113

isosceles long sides

114

riot or plant foot area

115

magnetic elements

120

Recess tube or other recess hollow body

121

outside or outer jacket

122

longitudinal slit

122a

overlap slot

122b, 122c

opposite slit edges

122d

attack

123

Wall of the recess hollow body

124

Interior of the hollow body

130

Expandable hose or recess hose that can be filled with pressure medium

131

expanding inner tube

132

Three-point support body

133

centric hole

134

support hump

140

cable ties

150

double headed anchor

200

component

201

cavity

202

cavity inner wall

203

Entry/Exit Gap

204

Corner

205

undercut

300

formwork

D1

initial diameter

D2

flare diameter

D3

shrink diameter

B

Tab Width

SB

slot width

SB1

initial, larger slit width

SB2

smaller slot width

Claims (15)

Method for producing a cavity (201), for example a coupling or storage or drainage channel chamber, in a component (200) which is formed with concrete or another hardenable building material, the method comprising the following steps and at least the steps b) and c) are interchangeable in order: a) providing a formwork (300) for introducing the building material, b) placing or attaching a recess tube (120), flexible recess hose or other recess hollow body (120) in or on the formwork (300) for later formation of the cavity (201) in the component (200), c) Changing the diameter (D1, D2, D3) or other dimensions of the recessed hollow body (120) in such a way that later, after the building material has hardened, it comes loose or rests on or against the inner wall (202) of the cavity (201) can be realized or made possible in the hardened component, d) Inserting the building material into the formwork (300), with the building material still being in a mouldable, in particular flowable or castable state, and with an outer casing or at least one outside of the cavity hollow body (120) being completely or partially surrounded by the building material or is covered e) curing of the building material. Method according to Claim 1, characterized in that after the building material has hardened, the diameter (D1, D2, D3) or other extent of the recessed hollow body (120) is changed further in order to prevent the recessed hollow body (120) from becoming detached. from the cavity inner wall (202) to allow. The method according to claim 1 or 2, characterized in that changing the recess-hollow body (120) in its diameter (D1, D2, D3) or in its other extension via a change in the Width (SB1, SB2, SB) of an axially parallel longitudinal slot (122) which passes through the wall (121) of the recess hollow body (120). Method according to Claim 3, characterized in that the longitudinal slot (122) is widened, dimensioned or adapted by inserting a widening inner tube (131) or other widening inner hollow body into the recess hollow body (120). Method according to Claim 1 or 3, with the exception of Claim 2, characterized in that the diameter (D1, D3) or any other extension of the hollow body (130) is compressed or reduced. Recess hollow body (120), in particular recess tube, as a tool for carrying out the method according to one of Claims 1-5, characterized by a longitudinal slot (122) running parallel to a body axis, which has its wall (123) in the tube or interspersed with the interior of the hollow body. Assembly and/or cut-out strip (110) as a tool for carrying out the method according to one of Claims 1-5, characterized by a preferably round cross-section and/or preferably elongated channel or other depression (112) on the outside of a strip or a strip Coat, wherein the recess (112) is designed for at least partially receiving and / or for holding a recess hollow body (120). Assembly and/or recess strip (110) as a tool for carrying out the method according to one of Claims 1-5, characterized by one or more elongated or axially parallel projections (111), preferably with an at least partially wedge-like basic shape when viewed in cross section, the respective projection (111) is designed to pass through the longitudinal slot (122) of the recess tube (120) or other recess hollow body (120). Tool set (100) for carrying out the method according to one of Claims 1-5, characterized by : • a mounting and/or recess strip (110), in particular according to one of Claims 18-21, having means for supporting and/or holding the recess hollow body (120) and/or for fastening to a formwork wall or formwork (300 ) and/or for expanding the width (SB, SB1, SB2) of a longitudinal slot (102 20) in a recess tube or other recess hollow body (120) and • a recess tube or other recess hollow body (120), in particular according to claim 16 or 17, with an axis-parallel longitudinal slot (122) in its wall, and/or a flexible recess hose (130). Arrangement with a recess tube (120) or another recess hollow body (120) and with a mounting and/or recess strip (110) for carrying out the method according to one of Claims 1-5, characterized in that the recess Tube or other recessed hollow body (120) is inserted into a channel (112) that is preferably round in cross-section and/or preferably elongate or other recess on the outside of a strip or a strip jacket. Arrangement according to Claim 10, characterized in that a flexible expansion hose (130) that can be filled with pressure medium or another expansion body, in particular a hollow expansion body, is introduced into the recess tube or into the other recess hollow body (120). Arrangement with a recess tube or another recess hollow body (120) and with a mounting and/or recess strip (110) for carrying out the method according to one of Claims 1-5, characterized in that an axis-parallel longitudinal slot (122) of the Recess tube or other recess hollow body (120) is traversed by an elongated or axially parallel, preferably at least partially wedge-shaped and / or sword-like projection (111) of the mounting and / or recess strip (110). Arrangement according to one of Claims 10-12, characterized in that the recess hollow body (120) lying against the mounting and/or recess strip (110) has a greater or further extension transversely to the longitudinal direction than the said strip (110) and/ or surpasses the latter transversely to the longitudinal direction. Use of a pipe (120), flexible hose (130) or other hollow body to produce a cavity (201), e.g. a coupling or storage or drainage chamber, in a component (200) which is formed with concrete or another hardenable building material is. Use according to Claim 14, characterized in that the tube (120) or another hollow body is provided with a longitudinal slot (122) parallel to the axis.

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