WO2008107036A1

WO2008107036A1 - Multi-layer concrete ceiling structure comprising a pipe system

Info

Publication number: WO2008107036A1
Application number: PCT/EP2008/000223
Authority: WO
Inventors: Gerold Bernhardt
Original assignee: Bautevent Gmbh
Priority date: 2007-03-05
Filing date: 2008-01-14
Publication date: 2008-09-12
Also published as: EP2115232A1; RU2009136602A; DE102007010924A1; US20100101162A1

Abstract

The invention relates to a concrete ceiling structure having a multi-layer design and comprising pre-stressed elemental plates (10) for absorbing tensile stress, and at least one layer of cast-in-place concrete (50), especially reinforced concrete, arranged on the plates and used to absorb compressive stress. A pipe system (40) for the circulation of a fluid, especially air, is built into the structure, for heating or cooling. The pipes (40, 140, 240) are arranged in the cast-in-place concrete layer (50), above the elemental plates (10).

Description

MULTILAYER CONCRETE CONSTRUCTION WITH PIPING SYSTEM

The invention relates to a concrete floor construction comprising a multilayer construction comprising prestressed element panels for absorbing tensile stresses and at least one layer of in-situ concrete disposed thereon, in particular reinforced concrete, for absorbing compressive stresses.

In industrial, commercial and residential construction, floor slabs are widely used for large spans. Especially in office building component activation is in demand, so that in many cases the wide-stretched ceilings are no longer suspended, but the concrete base is completed after filling and painting, so that a corresponding heat radiation can be done.

Concrete floor constructions are known which have a multi-layer structure, which are formed from prestressed element panels and from a layer of in-situ concrete arranged above them. The disadvantage here is that the spans are limited to about 10 to 12 meters in these known constructions. Another disadvantage of the known constructions that component activation, d. H. a use of the ceiling surface by heating or cooling for the air conditioning of the underlying space is not possible.

The object of the invention is to develop a concrete floor construction of the aforementioned type such that the concrete ceiling construction allows large spans at a minimum thickness of the overall construction, ie in particular Office building or the like to build from outer wall to outer wall without intermediate support and further to allow to use the ceiling by a component activation by heating or cooling for air conditioning of the underlying space.

This object is achieved by a concrete ceiling construction according to claim 1.

By incorporating a piping system for passing a fluid, in particular air, for heating or cooling, the pipelines being disposed above the element plates in the in-situ concrete layer, it is possible to direct heated or cooled air to heat or cool the concrete deck construction through the pipelines and thereby heat or cool the entire concrete deck construction for air conditioning the space below. It is further advantageous in that the fact that the piping system is disposed over the element plates in the in-situ concrete layer, the specific weight per square meter ceiling area is reduced by the displaced concrete in the concrete layer by the pipe without affecting the strength of the concrete floor construction, as below Pipelines prestressed element plates for receiving the tensile stresses are arranged and wherein the arranged over the prestressed element plates layer of in-situ concrete, in which the pipes of the piping system are arranged, is suitable for receiving compressive stresses. This makes it possible to achieve a span of up to 16 meters, with a total ceiling thickness of 40 cm.

By inserting tubes that can be used simultaneously for transporting a fluid, preferably air, for component activation, the blanket weight is significantly reduced, thereby reducing both bowing and rebar levels.

Further advantageous embodiments of the invention are specified in the subclaims. It is thus particularly advantageous if the pipelines are arranged in the region of the neutral fiber of the concrete ceiling construction.

By arranging the piping in the area of the neutral fiber of the concrete floor construction, d. H. in that area in which the concrete ceiling construction undergoes neither a compression nor an elongation as a result of a deflection due to the weight, on the one hand, the integrated piping system is mechanically unclaimed and on the other hand by the arrangement of prestressed element plates for receiving the tension below the pipes and of in-situ concrete for receiving of compressive stresses mechanically optimized the entire concrete ceiling construction. The layer of in-situ concrete is arranged in such a way that it encloses the pipeline system integrated in the concrete ceiling construction and also extends above the integrated pipeline system for absorbing compressive stresses.

Preferably, lattice girders and / or composite elements are arranged between the prestressed element plates and the in-situ concrete. As a result, a bond between the precast slab and the in-situ concrete is produced.

In a preferred embodiment, the pipelines have a profiled surface and / or reinforcements arranged on the pipe surface, which form a composite with the in-situ concrete and in particular supplement or replace the lattice girders in regions. By laterally profiled tubes which are introduced into the concrete ceiling construction, it is thus possible that the pipes in turn produce the composite with the in-situ concrete, so that at least in this area lattice girders are not required.

In the concrete ceiling construction, at least some element plates may have passages through which pipelines can be passed, wherein transverse reinforcements are additionally arranged in particular in the region of each opening. Through these openings, the pipes in the precast slab with the fluid, preferably air, in particular conditioned air, are fed or the air can be directed into the space below the ceiling structure to air-condition the room. Since the openings in the prestressed concrete slab mean a punctual weakening of the slab, in particular additional transverse reinforcements are arranged in this region.

Preferably, these additional transverse reinforcements are arranged above the element plate, in particular additional transverse reinforcements in the region of passages in element plates for the passage of pipes are arranged above the element plate. Such transverse reinforcements may be arranged such that they are not arranged on the element plate, but are connected to each other via a loop structure by overlapping joints. The transverse reinforcement additionally allows the disk effect of the overall construction. This creates opportunities to meet a variety of architectural concerns, so that a variety of supports the ceiling structure are possible.

In a preferred embodiment, the pipes, in particular in the region in which a pipe passes through an element plate, designed with an oval or rectangular cross-section, in particular, the longer axis of symmetry is aligned in the direction of the main tensile stress.

The arrangement of an oval or rectangular tube ensures that the tube itself acts as a kind of carrier, which is already installed in the finished part. During assembly, the tube acts stiffening in the sense of a carrier and produces the composite. In order to prevent the bias voltage from being transmitted to the tube, corrugated intermediate pieces may be arranged at certain intervals, which prevent the transmission of the prestressing force to the tube. By such an arrangement of a tube with an oval or rectangular cross-section such that the longer axis of symmetry is aligned in the direction of the main tensile stress, the different buckling and bending strength in the direction of the two axes of symmetry of a non-circular tube can be advantageously utilized by the Tube itself is effective as a carrier and contributes to component strength. Preferably, the pipe ends leading to the environment through the element plates are closable by means of openable and / or removable flaps or the like. The arrangement of flaps or the like, a cleaning of the piping system is made possible, in particular a maintenance of the piping system.

Preferably, the element plates are made of high-strength concrete. Preferably, the element plates have a thickness of at least 8 cm, preferably 10 cm or 12 cm.

The use of high-strength concrete and / or a thickness of at least 8 cm for the element slabs creates a concrete slab structure with very high strength and load-bearing capacity, allowing large spans of the overall structure.

Preferably, the element plates on transverse reinforcements, which form in the transverse direction of the element plates side and / or obliquely upward overlaps, which form a composite with the in-situ concrete to absorb stresses of the secondary support direction. As a result, a safeguard against cracking in the transverse direction is ensured. In particular, a very load-bearing bond between the prestressed element panels and the in-situ concrete is produced in the transverse direction.

If a casing of the concrete ceiling construction is omitted in the edge area, d. H. that the pipe system arranged above the prestressed element plates is created in its spatial extent to a central region of the concrete ceiling construction while maintaining a distance to the edge region, it is possible to allow a Auflagerung the concrete ceiling construction in any Auflagersituationen.

In the figures, three embodiments of the invention are shown and will be explained in more detail below. Show it: 1 is a perspective view of a first embodiment of the invention (partially completed),

2 is a plan view of an element plate with piping system arranged above according to the embodiment of FIG. 1,

3 shows a prestressed element plate in the bottom view,

4 shows the section IV-IV of FIG. 2,

5 shows the section V-V of FIG. 2,

6 is a plan view of a prestressed element plate with piping system disposed above a second embodiment of the invention,

7 shows the section VII-VII of FIG. 6,

Fig. 8 is a section through a third embodiment of the invention.

Shown in Fig. 1 is a perspective view of the concrete ceiling construction in partially completed state, which is formed in its lower portion by prestressed element plates 10. The element plates 10 are equipped with composite elements 20 and not visible in this perspective longitudinal and transverse reinforcements. At the longitudinal edges, the prestressed element plates 10 for producing a composite have obliquely upwardly directed loops 30, which are arranged alternately, as shown in FIG. These loops 30 and the longitudinal composite elements 20 form a composite with the in-situ concrete not yet applied in FIG. For this purpose, the loops 30 are formed such that they form over the longitudinal edge of the element plate 10 laterally projecting, obliquely upward overlaps 30 to absorb stresses of the secondary support direction. Above the prestressed element plates 10 are arranged pipelines 40, which form a piping system for the passage of a fluid for activating the component. By this thermal component activation can thus be done heating / cooling of the lying under the concrete ceiling construction space. Via connecting elements 41, which lead through passages in the element plates to the underlying space, the piping system for the purpose of removing air from the underlying space or air is introduced into the underlying space with this. From the bottom, the pipe ends leading to the underlying space of the connecting pieces 41 are closed by means of open flaps, through which a maintenance and cleaning of the piping system is made possible.

For the completion of the concrete floor construction of FIG. 1 now requires only the casting of a layer of in-situ concrete, which surrounds the pipes 40 and forms a load-bearing composite by means of the loop-shaped overlaps 30 and the composite elements 20.

The pipes 40 of the embodiment of the invention shown in FIG. 1 have a circular cross-section.

It is particularly advantageous that by the concrete ceiling construction according to the invention, consisting of prefabricated and prestressed element plates 10, above the element plates 10 arranged pipelines 40 and a to be poured on site construction site concrete, which surrounds the pipes 40 and covers and forms a bond with the element plates 10 , several benefits are realized. Thus, on the one hand, the static of the concrete floor construction is ensured by prestressed element plates 10 are arranged to absorb tensile stresses and arranged above the element plates 10 layer of in-situ concrete for receiving compressive stresses, the component activation of the concrete ceiling construction is made possible by the integrated piping system. At the same time, the construction of the concrete ceiling becomes easier by the integration of the pipelines 40, in order to pass through the pipelines 40 displaced in-situ concrete. Due to this reduction in mass per square meter of the concrete deck construction, larger spans are possible than in conventional concrete deck constructions having a multi-layer structure. At the same time a component activation of the concrete pavement is possible.

In the embodiment according to FIG. 1, the pipelines 40 are arranged in the region of the neutral fiber of the concrete ceiling construction, i. H. that in the finished concrete ceiling construction, the element plates 10 are tension-loaded and the not shown above the element plates 10, the pipes 40 enclosing and covering layer of in-situ concrete is pressure-loaded, wherein the pipes 40, characterized in that they are arranged in the region of the neutral fiber of the concrete ceiling construction, a mechanical stress are not exposed.

Fig. 2 shows a plan view of a prestressed element plate 10 with overlying pipes 40 of the embodiment of FIG. 1. The element plate 10 is equipped with longitudinal composite elements 20 and has passages into which fittings 41 of the pipes 40 are inserted, by means of which a Connection of the pipes 40 is provided to the lying under the element plate 10 space.

Fig. 3 shows a bottom view of an element plate 10 with loop-shaped overlaps 30 along the longitudinal edges of the element plate 10 and dashed lines indicated transverse reinforcements 25 which are introduced into the element plate 10. The loop-shaped overlap openings 30 are arranged such that they engage alternately with one another laterally arranged next to the element plate 10 further element plate. In order to ensure optimum introduction of force and the bond with the in-situ concrete, the transverse reinforcements 25 are formed on the edge of the element plate 10 in the form of the loops 30, ie the loops 30 and the transverse reinforcement 25 are components of the same lattice girder. The element plate 10 has a plurality of passages 11, to which the connecting pieces 41 of the above the element plate 10 arranged pipes 40 are connectable.

Fig. 4 shows the section IV-IV of FIG. 2 and partial enlargements of the details A and B. The concrete ceiling construction is formed by prestressed element plates 10 with tensioning reinforcements 35. Above are arranged pipelines 40 and composite or transverse force reinforcements 15. Also above the Element plate 10 are arranged reinforcements 45, which form a composite with the in-situ concrete layer 50. The in-situ concrete layer 50 encloses the pipes 40 and forms a composite with the reinforcements 45 and the composite or transverse force reinforcement 15.

Detail A shows the bearing of the concrete ceiling construction according to the invention on a side wall 60, on which the element plate 10 partially rests. The element plate 10, which contains clamping reinforcements 35, has a passage 11 for receiving a pipe connection piece 41 for connection to the pipeline 40.

Laterally and above the element plate 10 reinforcements 45 are arranged, which form a composite with the in-situ concrete 50. Both the element plate 10 and the finished in-situ concrete 50 form the support on the side wall 60.

Detail B shows in an enlarged section a middle region of the concrete floor construction with element plates 10, pipes 40 and reinforcements 45. The layer of in-situ concrete enclosing the pipes and the reinforcements 45 is not shown in this illustration.

To the pipe 40, a deflection box 44 connects. The piping system has a flow 42 and a return 43 and is connected via this flow 42 and return 43 with an air conditioning device for component activation, ie for heating or cooling connected. The element plates 10 include integrated clamping reinforcements 35, transverse reinforcements 25, at the end of which the loop-shaped overlaps 30 connect, as well as in the longitudinal direction of the element plate 10 extending composite elements 20. The overlaps 30 are under a Angle of 30 degrees against the horizontal employed and extend laterally and obliquely upward from the element plate 10 in the direction of the adjacent next element plate along the longitudinal edge. These loop-shaped overlaps 30 form a composite with the in-situ concrete 50. Above the element plates 10 are arranged the pipelines 40, which are completely enclosed by the layer of in-situ concrete 50. Via the loops 30 and the composite elements 20, which extend between the tubes 40 in the longitudinal direction, the composite of the concrete slab construction is produced.

6 shows a second embodiment of the invention in a plan view of an element plate 10 (same reference numerals designate the same parts as before) with composite grid elements 20 and arranged above the element plate 10 piping 140, via corresponding connectors 141 through passages in the element plates 10th connected to the environment.

Fig. 7 shows the section VII-VII of Fig. 6. The element plates 10 have an identical to the previous embodiment according to FIGS. 1 to 5 structure. Above the element plates 10, within the in-situ concrete layer 50, are arranged the conduits 140, which have a cross-section formed by two vertical side walls, the top and bottom of the conduits 140 being formed by circular arcs. Due to the vertical side walls of the pipe 140, the longer axis of symmetry of the pipe 140 is aligned in the direction of the main tensile stress, d. H. that the pipe 140 by the nature of its cross-section assumes a supporting function in the concrete ceiling construction.

Fig. 8 shows a section through a third embodiment of the invention. Above the prestressed element plates 10 are pipelines 240 arranged, which are enclosed by a layer of in-situ concrete 50 and covered. The pipes 240 have a rectangular cross section, wherein the longer axis of symmetry of the rectangular cross section is vertical and thus contribute to the side walls of the pipeline to the statics of the ceiling structure.

Claims

claims

1. Concrete floor construction comprising a multilayer construction, comprising prestressed element panels (10) for receiving tensile stresses and at least one layer disposed thereon Ortbeton (50), in particular reinforced concrete, for receiving compressive stresses, characterized in that a piping system (40) for the passage of a Fluids, in particular air, for heating or cooling is integrated, wherein the pipes (40, 140, 240) over the element plates (10) in the in-situ concrete layer (50) are arranged.

2. Betondeckenkonstruktioπ according to claim 1, characterized in that the pipes (40, 140, 240) are arranged in the region of the neutral fiber of the concrete ceiling construction.

3. Concrete floor construction according to claim 1 or 2, characterized in that between the prestressed element plates (10) and the in-situ concrete (50) lattice girders and / or composite elements (15, 20, 30) are arranged.

4. Concrete floor construction according to one of the preceding claims, characterized in that the pipes (40, 140, 240) have a profiled surface and / or arranged on the pipe surface reinforcements, which form a composite with the in-situ concrete (50) and in particular the lattice girders partially supplement or replace.

5. Concrete floor construction according to one of the preceding claims, characterized in that at least some element plates (10) have passages (11), through the pipes (40, 140, 240) are feasible, in particular in the region of each opening (11) arranged additional transverse reinforcements are.

6. Concrete floor construction according to claim 5, characterized in that the additional transverse reinforcements above the element plate (10) are arranged, in particular that additional transverse reinforcements in the region of passages (11) in element plates (10) for passage of pipes (40, 140, 240) are arranged above the element plate (10).

7. Concrete floor construction according to one of the preceding claims, characterized in that the pipes (40, 140, 240), in particular in the region which passes through an element plate (10) have an oval or rectangular cross-section, in particular the longer axis of symmetry in the direction the main tensile stress is aligned.

8. Concrete floor construction according to one of the preceding claims, characterized in that by element plates (10) through to the environment leading pipe ends (41) by means of apparent and / or removable flaps or the like can be closed.

9. Concrete floor construction according to one of the preceding claims, characterized in that the element plates (10) are made of high-strength concrete.

10. Concrete floor construction according to one of the preceding claims, characterized in that the element plates (10) have a thickness of at least 8 cm, preferably 10 cm or 12 cm.

11. Concrete floor construction according to one of the preceding claims, characterized in that the element plates (10) transverse reinforcements (25) in the transverse direction of the element plate (10) side and / or obliquely upward overlaps (30) form, with the in-situ concrete (50) form a composite to absorb stresses of the secondary support device.