EP0326837A2 - Hollow floor and method for its production - Google Patents

Abstract

The base plate (3) of a hollow floor (2) is laid on the uneven and inclined surface (11) of a building component (1). A top plate (6), on which optionally also a footstep sound insulation (7) is laid, is laid on the spacers (4) connected to the base plate (3). The said footstep sound insulation can be covered by a sealing foil (8), so that the cast floor (9) placed above is unable to flow through. The top surface (91) of the cast floor (9) is horizontal and even. A hollow floor (2), the cavity (10) of which is well defined on all sides and therefore very suitable for inserting conduits, is thus obtained. The combination of the dry construction method with the cast floor affords the advantage that the latter can be constructed and put to use rapidly (short drying time of the thin cast floor) and is at the same time absolutely even, without the complicated levelling work of other floors being necessary. <IMAGE>

Description

The invention relates to a hollow floor according to the preamble of claim 1 and a method according to the preamble of claim 6 for its manufacture.

Raised floors have the purpose, in IT systems, to be laid under the floor to connect different parts of the facility. Changes to the pipeline network can easily be made. Hollow floors of this type exist both in what is known as wet construction and in what is known as dry construction.

The wet construction method can usually only be carried out with reasonable effort on the new building and has the disadvantage of long drying times, so that the use requires longer waiting if one does not want to take the risk of moisture damage.

The dry construction method can be used almost anywhere and avoids the long drying times of the wet construction method. However, it has the disadvantage that in order to achieve good leveling, each spacer element has to be adjusted in height if you do not want to accept the unevenness tolerances (they can be considerable) adhering to the building surface. Such controllable elements are expensive. Nevertheless, the floors can almost never be set wobble-free.

The invention has for its object to provide a hollow floor which can be produced as quickly as possible and used as quickly as possible in an economically advantageous manner, without having to do without a flat, practically wobble-free upper surface.

To solve this problem, that in claim 1 Defined hollow floor and the method defined in claim 6 for its manufacture are proposed.

You can take advantage of the dry construction cavity structure without having to submit to the laborious height regulation of the spacers, whereby you can achieve freedom from wobble by preloading the substructure with the cast floor, which can also achieve a complete leveling of the upper surface. You can use such small thicknesses on the cast floor (a few centimeters) that it can be used almost immediately because it can dry out very quickly.

It is advantageous if the cavity is or is formed within prefabricated elements, because it is then possible by simply "dry" arranging such elements on a raw floor, but possibly also on a floating floor or even on a finished floor. It is particularly advantageous if the base plate has the spacers fully or partially integrated.

In any case, it is an advantage to have a base plate because this prevents the structure of the bare floor from getting in the way of the pipes or even damaging them.

Because a load-distributing effect of the cast floor occurs automatically, so to speak, the top plate can be chosen to be relatively thin, so that often a hardboard with a thickness of a few millimeters is sufficient, so that one does not have to resort to more expensive materials.

A sealing layer, for example a suitable film, as is customary in the construction industry, is advantageously arranged over the top plate so that the dry substructure is not wetted by the cast floor. However, this sealing layer also has the advantage that it is possible to work with very flowable casting material without it being able to penetrate into the cavity.

The known hollow floors suffer more or less from noise emissions or from noise transmissions, which can lead to very unpleasant resonance phenomena, especially in EDP systems.

According to a preferred embodiment of the invention, this evil is remedied by providing an insulation layer over the top plate and under the cast floor, it being possible to advantageously arrange the sealing layer just mentioned above the insulation layer. Such an insulation layer can advantageously be implemented as impact sound insulation, it being possible to use known materials, such as mineral fiber mats, mineral fiber boards, and also plastic foams and the like. Thereby, thermal insulation can of course also be achieved, so that the hollow floor can optionally also be thermally at a different level than the space above the hollow floor. This can be interesting for heating, ventilation and air conditioning technology.

The invention thus makes it possible, economically and quickly, to create a hollow floor with a flat upper surface which can also be put into use very quickly. You don't have to wait long until the utility floor (e.g. carpet, plastic covering, etc.) can be attached.

You can also achieve previously unprecedented sound insulation and also very good heat insulation if desired.

The invention is discussed below, for example using the purely schematic drawing.

• Fig. 1 eine Draufsicht, teilweise gebrochen, eines erfindungsgemässen Hohlbodens, und
• Fig. 2 einen Schnitt nach Linie II-II in Fig. 1, bei welchem die Schichtdicken nur in Abhängigkeit der guten darstellbarkeit, ohne Rücksicht auf die tatsächlich oft dünneren Abmessungen, dargestellt wurden.

Show it:

• Fig. 1 is a plan view, partially broken, of a hollow floor according to the invention, and
• Fig. 2 shows a section along line II-II in Fig. 1, in which the layer thicknesses were only shown depending on the good representability, regardless of the often thinner dimensions.

• 1 eine Betondecke eines Bauwerks (Rohboden),
• 11 die obere Oberfläche von 1,
• 2 ein Hohlboden als Ganzes,
• 3 Basisplatte, bis zu etwa 1 cm dick, biegsam und doch steif, aus stark gefülltem Polyurethan,
• 32 untere Fläche von 3, regelmässig uneben gestaltet und durch Gummieinlagerung relativ weich nachgiebig,
• 33 obere Oberfläche von 3, glatt,
• 4 Abstandhalter, hier mit 3 einstückig zu 5 verbunden,
• 5 Basiselement, aus 3 und 4,
• 6 Oberplatte, hier eine relativ dünne Hartfaserplatte,
• 7 Mineralfasermatte, etwa 2 cm dick,
• 8 Dichtungsfolie, z.B. Polyolefin, weniger als 1 mm dick,
• 9 Gussboden,
• 91 obere Oberfläche von 9,
• 10 Hohlraum, zwischen 3 und 6 ausgebildet.

The following transfer symbols are used:

• 1 a concrete ceiling of a building (raw floor),
• 11 the top surface of FIG. 1,
• 2 a hollow floor as a whole,
• 3 base plate, up to about 1 cm thick, flexible and yet stiff, made of highly filled polyurethane,
• 32 lower surface of 3, regularly unevenly designed and relatively softly yielding due to rubber incorporation,
• 33 top surface of 3, smooth,
• 4 spacers, here with 3 integrally connected to 5,
• 5 basic elements, of 3 and 4,
• 6 top plate, here a relatively thin hardboard,
• 7 mineral fiber mat, about 2 cm thick,
• 8 sealing film, e.g. polyolefin, less than 1 mm thick,
• 9 cast floor,
• 91 top surface of 9,
• 10 cavity, formed between 3 and 6.

In the plan view shown in FIG. 1, the individual layers in the drawing are shown removed from top to bottom.

All layers are shown in FIG.

At the bottom is a concrete ceiling 1 belonging to the building, the upper surface 11 of which is raw and thus uneven and also has a tolerance-dependent gradient from left to right.

On the upper surface 11 of the concrete ceiling 1 lies the hollow floor 2, which is constructed as follows:

The base plate 3 lies on the surface 11 with its lower surface 32. This lower surface 32 has a plurality of (not shown) elastically deformable humps, so that it can adapt well to the unevenness of the surface 11 under load.

The smooth upper surface 33 of the base plate 3 is interrupted by the spacers 4 integral with the base plate 3. The base plate 3 and the spacers 4 together form base elements 5.

The cavity 10 lying between the spacers 4 is delimited at the top by the top plate 6. It is therefore defined on all sides by smooth surfaces, which is conducive to the pulling in of the cables.

Mineral fiber mats 7 are placed on the top plate 6, which are covered at the top by a plastic sealing film 8, so that the casting base 9, which is liquid during casting, cannot run downwards.

This cast floor 9 has a flat horizontal upper surface 91. Its wedge shape shows that it can compensate for the inclination of the upper surface 11 of the concrete ceiling 1.

A useful covering can be applied directly to the surface 91 after waiting for the relatively short drying time.

As with other hollow floors, service openings can also be provided in the hollow floor according to the invention. As such, you can also provide connection openings wherever necessary, for which simple drilling can suffice.

In this way, the hollow floor according to the invention is simple, economically advantageous and can be produced quickly. It offers excellent impact sound insulation and a well-defined cavity, with a flat horizontal surface, without the need for laborious adjustment work.

Claims (10)

1.Void floor, in particular for IT rooms, with a base plate resting on a building surface, over which a top plate spaced from it by spacers is arranged so that there is a cavity between the base plate and the top plate, CHARACTERIZED that above the top plate ( 6) a cast floor (9) is provided which has an at least approximately horizontal upper surface (91). 2. Hollow floor according to claim 1, characterized in that at least the base plate (3) consists of a plurality of elements (5), optionally combined with the spacers (4). 3. Hollow floor according to claim 1 or 2, characterized in that a sealing layer (8), preferably a film, is provided between the top plate (6) and the cast floor (98). 4. Hollow floor according to one of claims 1 to 3, characterized in that between the top plate (6) and the cast floor (9), preferably between the top plate (6) and a sealing layer (8), an insulation layer (7), in particular one Impact sound insulation is provided. 5. Hollow floor according to one of claims 1 to 4, characterized in that the cast floor (9) consists at least predominantly of inorganic material and is, for example, a so-called anhydrite cast floor. 6. A method for producing a hollow floor, in particular for IT rooms, according to one of claims 1 to 5, in which a cavity is formed between a base plate placed on a building surface and under an upper plate spaced therefrom by spacers, CHARACTERIZED THAT above that A cast floor (9) is introduced in the top plate (6) in such a way that its upper surface (91) runs at least approximately horizontally. 7. The method according to claim 6, characterized in that the cavity (10) is constructed using prefabricated elements (5), for example from the base plate (3) and optionally also the spacers (4) including base elements. 8. The method according to claim 6 or 7, characterized in that before the introduction of the cast floor (9) over the top plate (6), a sealing layer (8), in particular a film, is arranged. 9. The method according to any one of claims 6 to 8, characterized in that before the introduction of the cast floor (9) an insulation layer (7), in particular an impact sound insulation, is arranged above the top plate (6) and preferably under a sealing layer (8). 10. The method according to any one of claims 6 to 9, characterized in that an at least predominantly inorganic cast floor (10), in particular a so-called anhydrite cast floor is introduced.

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