NL8301971A - Double walled inflatable building - has inner and outer foil shells and cavity filled with setting material - Google Patents

Abstract

The pre-fabricated building uses an inflatable structure. This structure is double-walled and consists of an inner shell forming the floor (1), walls and roof (7) and an outer shell forming a base (2), outer walls (9) and the roof, both shells consisting of flexible material with air-tight joins. Both shells are inflated using a compressor (8), the correct spacing between them being defined by flexible couplers. This cavity is then filled by a pump (5) with a material (4) such as light-weight concrete or plastics foam which sets into a monocoque structure. The shells are left in situ, the window and door openings being cut-out as required.

Description

'* f «- PREFAB BUILDING SHELHOME.

Method for manufacturing a prefabricated building with an inflatable structure and Structures manufactured according to this method.

The invention relates to a. inflatable and load-bearing structure for a house or building and the method for making the floor, walls and roof, which together form a whole 5. The load-bearing structure is around a double-deck tent, which is inflated. The cavity between the outer tent and the inner tent is filled with an insulating plastic, which hardens later and then forms the load-bearing construction.

In normal construction practice, concrete is poured between two 10 formwork bulkheads, which are later removed and have a low residual value. For horizontal surfaces, the formwork must be supported by an auxiliary construction.

The object of the invention is to provide an inflatable and load-bearing structure for the construction of prefabricated houses or buildings, wherein disadvantages of hitherto known types of formwork are obviated and wherein the internal and external formwork form an integral part with the load-bearing shell construction in the cavity. The formwork is one-off and permanent; this applies to the floor, walls and roof. The inner and outer tent are manufactured from such material that in the final phase the outer tent acts as a roof covering, while the inner tent functions as an inner wall finish.

The inflatable method is known from U.S. Patent No. 2,826,157, which uses an edge-formwork to be removed and the inflatable structure is only inflated after the poured concrete has hardened sufficiently. As a result of the resulting moments, the Peel in predetermined plates at already collapsed metal bending strips.

The object of the invention is to build faster, when the load-bearing 3C structure is inflated, the concrete is immediately poured and hardened on the pneumatic formwork in the desired shape.An edge formwork is not necessary, the floor and wall form one whole.The construction consists of one piece, without breaking lines. Depending on the span and thickness of the shell, a synthetic fiber or steel 8301971 r 2 '^% fiber is added as reinforcement. For the concrete, an insulating lightweight concrete or insulating synthetic foam is used, in short a curing liquid *

U.S. Pat. No. 2,270,229 also discusses the manufacture of a structure without formwork. The inflatable structure is anchored to the pre-poured concrete foundation beam. After the inflatable element is inflated, the reinforcement and then the shotcrete applied in thin layers. When the whole has hardened sufficiently, the inflatable element is removed 1C A variant of this system is the Bini shell with Dutch patent: 151767 »Here too, an inner tent is inflated, which is anchored to a concrete foundation beam. The concrete and reinforcement are applied before inflation, and during inflation the concrete flows evenly between the reinforcement and thus spreads regularly over the surface.

The object of the invention is to build faster and cheaper, because the concrete foundation beam is lacking with the necessary connection details between the inflatable element and the concrete beam. The inner tent and the floor form one whole and the structure is closed in itself.

20 The flysheet acts as a formwork during pouring and when finished as roofing material, which then no longer needs to be applied. Chemical additions to the insulation concrete ensure a good liquid mixture, which is pumped into the cavity between the inner and outer tent .Inner and flysheet are connected by 25 flexible spacers, so that the flysheet does not tend to fill unevenly at the base during filling.

Sen and others can also be controlled by adjusting the rate of rise of the concrete. Depending on the filling material, the flexible connection of inner and outer tent is also necessary, if the cavity is filled with plastic foam, which is sprayed or flowed locally in shots .

The invention was developed from the basic idea of the double-roof tents combined with an inflation system. The advantages have remained the same, namely. quick to set up, easy to transport and cheap.The disadvantages have largely disappeared, namely solid walls dale and floor with high insulation value, high storm resistance, greater durability depending on the choice of material.

The invention also includes a new method obtained with the new method, the shape of which is not limited to circular or cylindrical. Various modified embodiments can be developed without departing from the scope of the invention.

The invention is explained in more detail below with reference to drawings 5.

Fig. 1 is a schematic vertical section of the foundation in the construction phase.

Fig. 2 is a schematic vertical section of the building during erection.

FIG. 3 is a schematic horizontal section of the wall provided with air tubes.

Fig. 4 is a schematic vertical section over the foundation with modified outer bottom ring.

Fig. 5 schematically shows the location of the air tubes. Fig. 6 schematically shows the connection of the wall to the floor; schematic vertical foundation section.

When carrying out the method according to the invention, the foundation is first made. The soil is laid on well-bearing soil. The top 1 and the bottom 2 of the bottom 20 consist of foil. The outer bottom ring 3 is inflated by the compressor 8. By the concrete pump 5, the bottom is foamed with insulating foam 40 to level the top of the bottom 1 during curing, a layer of water 6 "is placed on the bottom 1 in the tent. Inner and outer tent, respectively 7 and 9 simply lie on the bottom during this phase. After hardening of the bottom 4, the water 6 is removed and the bottom ring 3 is foamed full.

Fig. 2 shows the further construction. With the compressor 6 the inner tent 7 is inflated. Depending on the size and the further version, the outer tent is inflated via the compressor 8, 3C a pressure relief valve 12 in the wall of the inner tent 7 or via air tubes 1C, which are placed in the cavity between inner tent 7 and outer tent 9. Tgl. Fig. 3 and 5, the concrete pump 5 fills the cavity between the walls 7 and 9 with insulating foam 4. Inner tent 7 and outer tent 9 are flexibly connected to each other by plastic wires 35 as spacers. See Fig. 3-The spacers 11 can be applied in many variations.

In Fig. 6 the connection between the wall and the bottom is detailed 3 3 0 19 7 1 Γ 4 The connection between the wall and the bottom is perforated, so that the foam 4 from the wall adheres to the foam 4 in the 4th bottom .

Fig. 4 shows the same detail with a different outer bottom ring 3. In connection with frost-free installation depth or desired increased threshold against flooding, the shape of bottom ring 3 can be adapted.

After hardening, the house can be finished normally, windows and doors are sawn with normal tools and can then be placed. Roof and wall finishing is unnecessary. 10 Regarding the design, the following shapes are eligible: shell-shaped, dome-shaped, hemispherical or spherical built up of flat surfaces, such as triangles, polygons.

As for the materials, for the inner tent 7 »4th outer tent 9» 4th bo-15 4emb top 1 and the bottom bottom 2, for this the material is used: cloth, fabric, plastic or foil, which has a high tensile strength by nylon fabric- With regard to the concrete, depending on the client, the following materials are used as foam 4 for the walls, roof and floor: concrete} foam concrete lightweight concrete with foam-former, such as perlite concrete, argex concrete, concrete consisting of a light , insulating additive, bound by a hydraulic binder and water or by a plastic binder; plastic foams, such as pu foams, phenolic foams, etc., etc.

To make the drawings easy to read, here follows 25 after another explanation of the numbers used: 1 Inner tent top bottom.

2 Flysheet bottom bottom.

3 Outer bottom ring.

4 Insulating foam as support structure.

30 5 Concrete pump or mixing installation foam with synthetic fibers as reinforcement for the concrete.

6 Waxer.

7 Innertent 8 Compressor.

35 9 Flysheet, 10 Air tubes in the cavity between flysheet and flysheet.

11 Plastic spacers.

12 Pressure relief valve.

8301971

Claims (6)

1. Method for manufacturing a prefabricated building with an inflatable and load-bearing structure, characterized in that this structure consists of an inner and outer tent for the floor, walls and roof, which together form one whole, the connection between inner and outer tent are provided by flexible, plastic spacers or air tubes and where the seams of the inner and outer tent are welded airtight, so that both tents form inflatable pressure chambers, which are made of a material 10 that makes it possible to use as pneumatic formwork when building prefabricated buildings. 2. Method according to claim 1, characterized in that the inner and outer tent are not removed after the cavity filling has hardened, but form an integral part of the supporting construction, wherein the outer tent protects against atmospheric influences and the inner tent finishes the internal cares. Method according to claim 1, characterized in that the floor, wall and ring beam form one whole Method according to claim 1, characterized in that the pneumatic formwork, i.c. the inner and outer tent, determine the final shape of the building. 5. Method according to claim 1, characterized in that an insulating liquid is applied in the cavity between the inner and outer tent, which later cures in solid form and forms the supporting construction, optionally provided with reinforcing fibers for this purpose. Building manufactured with the method according to any one of the preceding claims. Attachments: 2 sheets of drawings. S301971