WO2020183206A1

WO2020183206A1 - Permanent formwork, building structure and method for creating the building structure

Info

Publication number: WO2020183206A1
Application number: PCT/HU2020/000005
Authority: WO
Inventors: Krisztián TAKÁCS
Original assignee: Mester Qualitas Kft.
Priority date: 2019-03-14
Filing date: 2020-01-30
Publication date: 2020-09-17
Also published as: HUP1900079A1; EP3935234A1

Abstract

The invention is a permanent insulating formwork comprising insulating members (10) arranged adjacent to each other and made of an insulating material, the insulating members (10) having vertical lateral slots (12), the slots (12) of adjacent insulating members (10) forming, pair-by-pair, a respective connected spatial region, and the formwork further comprising internal coupling members (20) adapted to be fitted into the connected spatial regions by a form-fit connection and for coupling the adjacent insulating members (10). The permanent insulating formwork is characterised in that the adjacent insulating members (10) are arranged to contact each other by their lateral faces and to cover a base surface, and the formwork further comprising formwork members (30) made of an insulating material and being in abutted contact with the outermost insulating members (10) along the edges of the base surface, the formwork member (30) comprising a vertical slot (32) which is aligned with an external slot (12) of the insulating member (10) being in abutted contact therewith, and the formwork member (30) and the insulating member (10) in abutted contact therewith are coupled to each other by a common external coupling member (26) form-fitted in their aligned slots (12, 32). The invention is furthermore a building structure comprising the permanent formwork and a method for creating the building structure comprising the permanent formwork. (Fig. 9)

Description

PERMANENT FORMWORK, BUILDING STRUCTURE AND METHOD FOR CREATING

THE BUILDING STRUCTURE

TECHNICAL FIELD

The invention relates, on the one hand, to a permanent insulating formwork, and, on the other hand, to a building structure comprising the permanent insulating formwork. The invention further relates to a method for creating the building structure comprising the permanent insulating formwork.

BACKGROUND ART

The prior art contains a number of technical solutions related to modular building structure elements comprising an insulating material, and to building structures prepared by applying such elements, the buildings comprising such building structures usually not requiring additional thermal insulation.

Document US 2015/0093535 A1 discloses a wall structure formed by casting to form an insulating foam material, wherein the wall structure is made up of a polyisocyanurate (PIR) slab and a foam layer. The PIR slabs can be secured to a frame that is adapted to be filled up with foam. The spaces for doors and windows can be defined by additional support members forming a frame before casting the foam, so wall structures adapted for receiving doors and windows without further modifications can also be produced. The foam layer introduced at least partially between the frames can for example made of polyurethane, polyisocyanurate, or a combination thereof. The drawback of this technical solution is that the PIR slab and the frame encompassing the foam do not provide sufficient stability for the wall structure to bear the weight of a monolithic reinforced concrete floor/ceiling, or of additional stories.

Document US 6, 167,624 B1 discloses a method for producing a modular wall panel, comprising applying a hot wire for cutting a vertical slot into a wall panel made of polymeric foam, and introducing into the slot a stiffening or load-bearing element adapted for reinforcing the wall panel. The wall panels produced by applying the method can also be used as roofing elements. The wall panels can be coupled to each other by means of tongues and channels formed at their sides. The stiffening or load-bearing element introduced in the wall panel can be made for example of metal or wood, while for example the polymeric foam can be expanded polystyrene foam (EPS). Cutting out the vertical slots is a lengthy process that also generates waste.

A similar solution is disclosed in WO 2014/133989 A2 that discloses a building panel that is made of EPS and is adapted for producing walls, flooring or roof systems. Window and door spaces can be made in the building structure element by removing the EPS material, and the elements can also comprise horizontal, vertical and diagonal chases adapted to receive cables, wires, or stiffeners, or to be filled with other structural materials. As with the previous solution, the removal of insulating material from the elements increases the labour required and generates waste, while the stiffening elements introduced post-manufacturing into the chases do not provide the stability required for permanent buildings, for example homes.

US 2010/001 1699 A1 also discloses a modular wall panel made of EPS foam, comprising recesses at the side, with common connecting panels - also made of EPS foam - being adapted to be placed in the recesses of adjoining wall panels. There are vertical chases formed in the EPS foam that are adapted for receiving the cables to be inserted in the wall panel, with right-angled metal support (stiffening) members being disposed in slots cut to the EPS foam. At the bottom and top, the wall panels are also held together by a track system. The disadvantage of this technical solution is that the applied track system has an inherent risk of forming thermal bridges.

A common disadvantage of the technical solutions applying EPS is that EPS is not waterproof, i.e. it does not form a moisture barrier, so the stiffeners - typically made of metal - are subjected to corrosion, or have to be specifically treated to provide protection against corrosion; and the applied stiffening solutions do not provide sufficient stability for the wall members to bear the weight of reinforced concrete floors or additional stories.

US 2007/0277469 A1 also discloses modular wall panels made of thermal-insulating foam, for example EPS foam, wherein the wall panels are coupled to each other by means of recesses and appendages formed of the thermal-insulating foam. The joints between the wall panels are stabilized by stiffening members, while the wall panels are also held together at the bottom and top by track plates. In addition to EPS foam, the wall panels can also be made of an EPS-cement composite material, polyurethane or other polystyrene foam, for example extruded polystyrene (XPS). This technical solution also has the disadvantage that the applied track system can lead to the formation of thermal bridges.

EP 2 226 444 A2 also discloses interconnectible wall panels made of insulating material. The wall panels comprise recesses and projections that allow them to be closely coupled together without using an adhesive, and, in addition to that, thanks to the dovetail-shaped profiles of the recesses and projections, the wall panels are also prevented from slipping away from each other. The applied insulating material can be EPS, XPS, or pressed wood wool. The wall panels are formed of multiple interconnected portions, with external and internal brick wall elements being disposed on the outside and inside of the wall, and with thermal insulation elements being disposed between the brick wall elements. The disadvantage of the solution is that, in addition to the insulation disposed between the brick walls, it also requires further external insulation.

AT 010 339 U1 discloses interconnectible modular wall panels comprising polystyrene- containing thermal insulation sheets and support members, with the support members being optionally integrated into the thermal insulation sheets, for example during the casting of the sheets. The thermal insulation sheets are made of polystyrene concrete that contains cement, foam polystyrene (granulate) and other binders, the material of the support members being preferably metal, wood, concrete, or reinforced concrete. The wall panels can also be coupled to the flooring and the ceiling (in addition to being adapted to be coupled together).

WO 99/14450 discloses prefabricated building panels, a building produced by applying the elements, and a production method therefor. The wall panel according to the document comprises an internal metal mesh completely encompassed by the insulating foam material cast around it. In the course of the production method of the wall panel, first the metal mesh is placed in the form, followed by casting insulating foam (preferably EPS) to the form. The disadvantage of the technical solution is that it does not provide the wall panel with sufficient reinforcement for supporting a floor/ceiling, so can be applied at most for constructing temporary buildings.

WO 2016/083292 A1 also discloses prefabricated wall panels comprising at least one metal mesh for stiffening the insulating foam material of the wall panel. During the production of the wall panel, the insulating foam is cast to the desired form, i.e. it is not necessary to cut it to size after manufacturing. The insulating foam is preferably sintered EPS. This technical solution also has the disadvantage that it does not provide sufficient strength for supporting a floor/ceiling, so it is also not suited for constructing a non-temporary building; in addition to that, the EPS material is not waterproof, so it is required to apply further treatment (coating) to the wall panel. DE 2356483 discloses a wall- or flooring member consisting of centrally disposed insulating members and connecting members adapted for joining them in a grid-like manner, which are surrounded at both sides by a respective concrete slab. The concrete slabs are adapted for stabilizing the wall or flooring members. The disadvantage of this technical solution is that the insulating members are encompassed by concrete, so the wall or flooring members are not suitable for constructing a building that is free from thermal bridges.

In HU223387 B1 , a building structure lightened by a permanent formwork piece is disclosed together with a method for producing the same. The cavities of the formwork pieces placed beside each other and the gaps between the fitted-together formwork pieces are filled with concrete. The drawbacks of the solution are that the concrete applied for filling the gaps between the formwork pieces can form a thermal bridge, and that the formwork pieces are not able to form a uniform-thickness insulation layer.

DESCRIPTION OF THE INVENTION

In the light of the known solutions, there is a need for a permanent formwork and for a building structure comprising the permanent formwork, as well as for providing a method for producing the building structure, which formwork and building structure made up of elements comprising a thermal insulation material, thus making it unnecessary to apply additional thermal insulation, where the formwork and the building structure also comply with the mechanical and stability requirements set for permanent residential or other buildings.

The object of the invention is to provide a permanent formwork, a building structure produced using the permanent formwork, and a method for producing the building structure, that eliminate the drawbacks of prior art solutions to the greatest possible extent.

The primary object of the invention is to provide a permanent formwork that can be applied both as a wall base and as a floor formwork which at the same time also implement the external thermal insulation of the building, while, after assembling the formwork with other building structure elements results in a building structure that is free from thermal bridges and has a thermal envelope.

Another object of the invention is to provide a formwork that is made up of elements that are coupled to each other without gaps, and can be coupled to each other easily and quickly.

A further object of the invention is to provide a building structure comprising building structure elements adapted to be coupled to the permanent formwork, which building structure elements can be assembled with the permanent formwork easily, and without special expertise, and the building structure thus produced has a configuration free from thermal bridges.

A further object of the invention is to provide a building structure having static properties allowing that the building structure can be feasibly applied for the purposes of a residential building intended for permanent use.

A further object of the invention is to provide a method for producing a building structure that is enveloped by insulating material and is free from thermal bridges.

The objects according to the invention have been achieved by the permanent formwork according to claim 1 , by the building structure according to claim 9, and by the method according to claim 15. Preferred embodiments of the invention are defined in the dependent claims.

An advantage of the permanent formwork according to the invention is that the formwork required for constructing the foundation or floor of the building forms a part of the building, so it is not required to remove it after the construction is finished, which reduces time and labour necessary for the construction project. The structural elements of the formwork can also provide insulation for a wall base or floor, i.e. it is not necessary to apply additional insulation, which further reduces construction time and labour, and construction costs.

It has been recognised that by applying structural elements that are manufactured to shape and are adapted to be fitted together, the duration of building construction and the workforce required for it can be greatly reduced, while generating smaller amounts of on-site waste.

It has also been recognised that the building structure produced by coupling to each other further structural elements related to the permanent formwork allows for constructing a building provided with a thermal bridge-free insulation, which building can even be certified as a passive building due to its low energy consumption and good insulation.

Another advantage of the invention is that the building structure can also be utilized as a permanent building or residential building (in addition to being utilized as a temporary or contingency one).

Furthermore, the advantages of the invention include that the building structure according to the invention allows buildings to be constructed in areas with sandy soil, or in moorlands, because the total mass of the building is nearly 40 percent lower compared to conventional building structures. BRIEF DESCRIPTION OF THE DRAWINGS

Preferred embodiments of the invention are described below referring to the following drawings, where

Fig. 1A shows a perspective view of a preferred embodiment of an insulating member of a permanent formwork according to the invention,

Fig. 1 B is the top plan view of the insulating member according to Fig. 1 A,

Fig. 1C is the front and side elevation view of the insulating member of Fig. 1A,

Fig. 2A is a perspective view showing a preferred embodiment of a coupling member of a permanent formwork according to the invention,

Fig. 2B is a top plan view showing the coupling member of Fig. 2A,

Fig. 2C is a side elevation view of the coupling member according to Fig. 2A,

Fig. 2D is a front elevation view of the coupling member according to Fig. 2A,

Fig. 3A shows a perspective view of a preferred embodiment of a formwork member of a permanent formwork according to the invention,

Fig. 3B is a top plan view showing the formwork member of Fig. 3A,

Fig. 3C is a side elevation view of the formwork member according to Fig. 3A,

Fig. 3D is a front elevation view of the formwork member of Fig. 3A,

Fig. 4 is a perspective view showing a preferred embodiment of a wall member,

Fig. 5 is a perspective view showing another preferred embodiment of a wall member, Fig. 6A is a front elevation view of the wall member of Fig. 5,

Fig. 6B is a side elevation view of the wall member of Fig. 5,

Fig. 6C is a side elevation view of the wall member of Fig. 5,

Fig. 7 shows a top plan view of a preferred embodiment of a building structure according to the invention that comprises a permanent formwork implemented as a wall base formwork, and a wall member according to Fig. 5,

Fig. 8 is a front elevation view of a portion of the building structure according to Fig. 7, as seen from inside the building,

Fig. 9 shows a side elevation view of a portion of the building structure according to Fig.

7,

Fig. 10 shows, in top plan view, a portion of a preferred embodiment of a building structure according to the invention, comprising a permanent formwork implemented as a portion of a floor formwork,

Fig. 11 shows a front elevation view of a portion of the building structure according to Fig. 10, as seen from the outside of the building, Fig. 12 shows, in top plan view, a detail of a preferred exemplary embodiment of a building structure, comprising a permanent formwork implemented as a portion of a floor formwork and also comprising insulation covering the floor,

Fig. 13 shows a front elevation view, of a portion of the building structure according to Fig. 12, as seen from the inside of the building, and

Fig. 14 is a side elevation view of a portion of the building structure according to Fig. 12.

MODES FOR CARRYING OUT THE INVENTION

The permanent formwork according to the invention comprises insulating members 10 that are aligned adjacent to each other (side by side) and are made of an insulating material, a preferred embodiment of the insulating members 10 being illustrated in various views in Figs. 1 A, 1 B, and 1C showing, respectively, a perspective view, a top plan view, and a front- and-side elevation view of the insulating member 10. The edges of the insulating member 10 that are obstructed from view are shown in dashed lines in the figures.

The adjacent insulating members 10 are arranged to contact each other by their lateral faces and to cover a base surface, the base surface preferably being a surface region corresponding to a foundation, for example a strip foundation or a slab foundation, of the building structure. The insulating members 10 are fitted closely (without gaps) against each other in order to cover the base surface. Seen in top plan view, the insulating members 10 preferably have a square, rectangular, triangular, hexagonal or other polygonal shape allowing for covering the base surface without gaps. Insulating members 10 with multiple different shapes can also be applied for covering the base surface, provided that they can cover the base surface without gaps. Preferably, all the insulating members 10 applied for covering the base surface have the same shape.

In the preferred embodiment according to Fig. 1 B, the insulating member 10 has a square shape (as seen in a top plan view), so the front and side elevation views of the insulating member 10 are identical (Fig. 1C).

The insulating members 10 are provided with vertical-axis lateral slots 12, the slots 12 of adjacent insulating members 10 forming, pair-by-pair, a respective connected spatial region. Each connected spatial region is adapted for receiving a coupling member 20, the coupling member 20 being adapted for coupling together the adjacent insulating members 10. A preferred configuration of the coupling members 20 is illustrated in Figs. 2A-2D. The configuration of the slot 12 allows for adjacent insulating members 10 to be coupled with the internal coupling member 20 that is form-fitted (fitted positively) in the connected spatial region defined by the slots 12. To provide for that, the slot 12 has an inward widening, preferably a dovetail, sectional shape. In Figs. 1A-1 C, slots 12 having dovetail-shaped sectional configuration are illustrated. The slot 12 can also have any other shape that allows for realizing a form-fit connection between the insulating members 10 and the internal coupling members 20 such that the coupled-together insulating members 10 are not displaced and do not slip away from each other. Along the vertical direction, the slot 12 preferably has a uniform cross section that allows for easier manufacturing and mounting. Along the insertion direction of the internal coupling member 20, the slot 12 can also have a uniformly narrowing, for example wedge-shaped configuration. All slots 12 of the insulating member 10 preferably have the same shape.

In the preferred embodiment according to Figs. 1A-1 C, the insulating member 10 comprises one slot 12 along each edge. As can be seen in the perspective view of Fig. 1A and the front and side elevation view of Fig. 1 C, the slot 12 is formed along the top face of the insulating member 10, and in the vertical direction the slot 12 does not extend along the entire thickness of the insulating member 10. By way of example, in the vertical direction, the slots 12 extend at most to 10-90% of the thickness of the insulating member 10, preferably at most to 30-70%, more preferably to half of the thickness of the insulating member 10. The slots 12 of the insulating members 10 shown in Figs. 1A-1C extend to half of the thickness of the insulating member 10. Such a configuration of the slots 12 results in that much fewer of the vertical fit lines between the insulating members 10 coupled to each other by the internal coupling members 20 extend along the entire length of the insulating members 10. Such lines could allow water and/or concrete to infiltrate between the insulating members 10. The possibility of thermal bridge formation is reduced to a great extent by configuring the fit lines to not extend along the entire thickness of the insulating members 10.

Along a lateral face of the insulating member 10, the width of the opening of the slot 12 is, by way of example, 20-60%, preferably 30-40%, of the size of the lateral face of the insulating member 10. For determining the width of the opening, it has to be taken into consideration that there should be no overlap between the inward-widening slots 12.

The insulating material of the insulating member 10 is preferably extruded polystyrene (XPS). The insulating member 10 is preferably made of the XPS material injected into a form (form-injection), where the shape of the form is identical with the shape of the insulating member 10, i.e. the form also comprises the slots 12 of the insulating member 10. After the insulating material has set, the insulating member 10 can be removed from the form that can be reused for producing another insulating member 10. It is thus not necessary to cut to size the form-injected insulating member 10 at the construction site of the building, which results in time and labour savings, and also no waste is produced at the construction site.

The permanent thermal insulating formwork is preferably implemented as a part of a wall base formwork and/or of a floor formwork, and thereby the insulating members 10 are implemented as sub-foundation insulation and/or insulation above a floor or roof. When insulating a top floor, it is expedient to place the insulating members 10 upside down with respect to the orientation shown in Fig. 1 A, i.e. with the open portions of the slots 12 facing downwards.

Another structural element of the permanent formwork according to the invention is the internal coupling member 20, of which a preferred realization is shown in Figs. 2A-2D, showing, respectively, a perspective view (Fig. 2A), a top plan view (Fig. 2B), a side view (Fig. 2C), and a front elevation view (Fig. 2D). In Fig. 2A, those edges of the internal coupling member 20 that are obstructed from view are shown in dashed lines. In Fig. 2B, the dashed line indicates a vertical cutting surface 22, while in Figs. 2C-2D it indicates horizontal cutting surfaces 24, along which the internal coupling member 20 can be cut.

The internal coupling member 20 is preferably made of an insulating material, more preferably of the same insulating material as the insulating member 10. The insulating material of the internal coupling member 20 is preferably XPS that is used to form the internal coupling member 20 by means of form-injection.

The internal coupling member 20 is form-fitted in the connected spatial region defined by the slots 12 of the adjacent insulating members 10, thereby coupling to each other the adjacent insulating members 10. If the thickness of the internal coupling members 20 is greater than the depth of the slots 12 of the insulating members 10, then the internal coupling members 20 can be cut to size along the horizontal cutting surface 24 indicated in the 2D figure, such that the top faces of the insulating members 10 covering the base surface and the internal coupling members 20 adapted to couple them to each other approximately form a flat surface (plane). Preferably, the thickness of the internal coupling member 20 is an integer multiple of the depth of the slots 12 of the insulating member 10, so that all of the internal coupling members 20 can be utilized (without there remaining an unused one). By way of example, the height of the coupling member 20 illustrated in Fig. 2A is three times the depth of the slots 12 of the insulating member 10, so a single internal coupling member 20 can be cut up (along the horizontal cutting surfaces 24) to form three internal coupling members 20 that can be applied for coupling to each other the insulating members 10 according to Figs. 1A-1C at three spots.

Along the edges of the base surface, the external slots 12 of the insulating members 10 are configured to receive an external coupling member 26, which external coupling member 26 is formed by cutting the internal coupling member 20 according to Fig. 2B along a vertical cutting surface 22. If the internal coupling member 20 has a symmetrical configuration, such as the preferred embodiment of Fig. 2B, then, by cutting the internal coupling member 20 along the vertical cutting surface 22, two external coupling members 26 can be produced from a single internal coupling member 20. By applying the external coupling member 26 it can be attained that an outside face of the building structure forms a vertical plane, without any building structure components protruding therefrom.

The permanent formwork further comprises, as a structural element, a formwork member 30, of which a preferred embodiment is illustrated in Figs. 3A-3D, showing, respectively, a perspective view (Fig. 3A), a top plan view (Fig. 3B), a side elevation view (Fig. 3C), and a front elevation view (Fig. 3D). In Figs. 3A, 3C, and 3D, those edges of the formwork member 30 that are obstructed from view are shown in dashed lines.

Like the insulating member 10, the formwork member 30 is made of an insulating material, preferably the same as the insulating material of the insulating member 10. The insulating material of the formwork member 30 is preferably XPS, the formwork member 30 being formed by form-injection.

The formwork member 30 has a slot 32, which slot 32 preferably extends along the entire thickness of the formwork member 30. The slot 32 has a configuration that is adapted for receiving an external coupling member 26, the external coupling member 26 being adapted to be form-fitted therein. The slot 32 preferably has an inward widening sectional shape, more preferably a dovetail sectional shape. The slot 32 can also have such other shapes that allow for realizing the form-fit connection between the formwork member 30 and the external coupling member 26. Along the vertical direction, the slot 32 preferably has a uniform cross section that allows for easier manufacturing, and, on the other hand, also makes it easier to assemble the permanent formwork. The shape of the slot 32 of the formwork member 30 is preferably identical to the shape of the slot 12 of the insulating member 10, and thus the internal coupling members 20 applied for coupling the insulating members 10 to each other can also be applied for coupling the formwork members 30 to other structural elements. In the preferred embodiment according to Fig. 3A, the slot 32 of the formwork member 30 has a dovetail configuration that has a shape and size identical to the configuration of the slot 12 of the insulating member 10 according to Fig. 1A.

The formwork member 30 is in an abutted contact with the outermost insulating members 10 along the edges of the base surface, such that the slot 32 of the formwork member 30 is aligned with the slot 12 of the insulating member 10 that is in abutted contact with the formwork member 30. By way of example, a building structure constructed on a slab foundation, the slots 32 of the formwork member 30 are arranged facing the outside of the building structure. The formwork member 30 is coupled to the insulating member 10 in an abutted contact therewith by means of a common external coupling member 26 that is formed by cutting the internal coupling member 20 along a vertical cutting surface 22, which common external coupling member 26 is adapted to form-fit inside the slot 32 of the formwork member 30 and into the slot 12 of the insulating member 10.

Optionally, the formwork members 30 can be secured to each other in a lateral direction, for example using additional slots 32; however, the insulating member 10 and formwork member 30 coupled to each other by means of the common external coupling members 26 have sufficient stability for counteracting the lateral loads of the load-bearing surface 52 (implemented, by way of example, as a slab foundation), so it is not necessary to further reinforce the permanent insulating formwork in the lateral direction. In the permanent thermal insulating formwork, sideways insulation is also provided by the formwork members 30, so it is not necessary to apply additional external insulation.

The permanent thermal insulating formwork according to the invention can be implemented as a wall base formwork and/or as a portion of a floor formwork, which are preferably the vertically mirrored counterparts of each other.

In the case of a wall base formwork, the internal coupling members 20 are introduced from above in the connected spatial regions defined by the slots 12 of adjacent insulating members 10, with the formwork members 30 being arranged abutted against the top of the outermost insulating members 10 along the edges of the base surface. Likewise, the common external coupling members 26, also introduced from above, are adapted to couple to each other the insulating members 10 and the formwork members 30 abutted against them by a form-fit connection. For producing a floor formwork, a load-bearing surface 52, implemented as a floor, is provided from below with a temporary horizontal supporting formwork, the load-bearing surface 52 to be formed being surrounded at the sides by the formwork members 30, with a common external coupling member 26 being introduced with a form-fit into the slots 32 of the shuttering members 30. The load-bearing surface 52 implemented as a floor is formed, by casting, of concrete in the spatial region defined by the temporary horizontal supporting formwork and the formwork members 30, and can preferably comprise additional reinforcing members, for example beams. Coupled to the common external coupling members 26, there are arranged insulating members 10 that are abutted against the formwork members 30, with the common external coupling member 26 being introduced in the slots 12 of the insulating members 10. The load-bearing surface 52 implemented as a floor is covered by insulating members 10 that are coupled to each other from below, preferably by cut-to-size internal coupling members 20.

In addition to the permanent insulating formwork, the building structure according to the invention also comprises a load-bearing surface 52 that is formed by casting in the spatial region encompassed by the formwork members 30 of the permanent formwork. The building structure further comprises a wall structure provided with external insulation, the wall structure is supported on the load-bearing surface 52 and is coupled without gaps to the formwork members 30. In the building structure, the permanent insulating formwork is preferably implemented as a wall base formwork and/or a floor formwork.

The wall structure preferably comprises a masonry wall provided with conventional external insulation; the external insulation being coupled in a gap-free manner to the shuttering members 30 of the permanent formwork. More preferably, the wall structure comprises a wall member 40 having a body made of an insulating material, of which a preferred embodiment is illustrated in a perspective view in Fig. 4.

The insulating material used for the insulating material body of the wall member 40 is preferably XPS, of which material the wall member 40 is made by form-injection. The insulating material body of the wall member 40 can also be made of a different material, preferably the same insulating material as was applied for producing the building structure components of the permanent insulating formwork. Thereby, the different components of the building structure have identical characteristics, for example, an identical thermal expansion coefficient, thermal transmittance, water absorption coefficient, etc. The wall member 40 comprises a slot 42, the slot 42 being adapted for connecting the wall member 40 to further building structure components, for example to the permanent insulating formwork. In the preferred embodiment according to Fig. 4, the wall member 40 comprises three vertical slots 42 that are arranged at the outside of the upper portion of the wall member 40. The slots 42 are formed in the form (mould) applied for making the wall member 40, so during manufacturing of the wall member 40 it is not necessary to cut slots 42 into the insulating material, which greatly reduces the amount of waste produced at the construction site.

The slot 42 has a configuration that is adapted for receiving an external coupling member 26, the external coupling member 26 being adapted to be form-fitted therein. The slot 42 preferably has an inward widening sectional shape, more preferably a dovetail sectional shape. In Fig. 4, a wall member 40 comprising three slots 42 having a dovetail sectional shape is illustrated. The slot 42 can also have such other shapes that allow for realizing the form-fit connection between the wall member 40 and the external coupling member 26. The slot 42 preferably has a uniform-shape cross section along the vertical direction, which facilitates the manufacturing of the wall member 40, and also its coupling to the permanent formwork or to other building structure components. The shape of the slot 42 of the wall member 40 is preferably identical to the shape of the slot 12 of the insulating member 10 and the slot 32 of the formwork member 30, more preferably it has identical dimensions thereto, which allows for applying identically configured external coupling members 26 for coupling to each other the different building structure components. When the wall member 40 is coupled to the permanent formwork according to the invention, the common external coupling member 26 - which also couples to each other the formwork members 30 and the outermost insulating members 10 of the permanent formwork implemented as part of a floor formwork - form-fits in the slots 42 of the wall member 40. Preferably, the height of the internal coupling member 20 according to Fig. 2A is such that the two external coupling members 26 can be formed therefrom by cutting it along the vertical cutting surface 22 exactly fill up the spatial region defined collectively by the slots 12 of the fitted-together insulating members 10, the slot 32 of the formwork member 30, and the slot 42 of the wall member 40.

In the wall member 40 there are arranged strengthening support members 44 extending vertically through the wall member 40, the support members 44 being surrounded at the sides by the insulating material. The support members 44 are arranged in the form (mould) used for producing the wall member 40 prior to introducing the insulating material, so, on the one hand, there is no need for post-fabrication cutting of the insulating material, and, on the other hand, the support members 44 that are encompassed, casted around by the insulating material are not displaced when the wall member 40 is moved (i.e. they do not slip out from the wall member 40).

In the preferred embodiment according to Fig. 4, the wall member 40 comprises two support members 44 that are arranged near opposite ends of the wall member 40. The support members 44 are dimensioned for bearing the weight of a load-bearing surface 52 implemented as a floor, and/or the weight of upper storeys, wherein the floor can also be a floor made of monolithic reinforced concrete. The support members 44 are preferably implemented by a metal column or beam, more preferably a steel H-section beam (or I- section beam, see Fig. 4). On the one hand, due to its greater surface area the steel bi section beam is better embedded in the insulating material, and on the other hand, due to the symmetrical configuration, it stabilizes the wall member 10 in the lateral direction. Preferably, the flat faces of the H-section steel beam are arranged parallel to the sides of the wall member 10, the H-profile support members 14 essentially acting as a frame for the insulating material between them, which lends additional stability to the wall member 10. In case the insulating material of the wall member 40 is XPS, it is not necessary to apply anti corrosion coating to the support members 44 because the XPS essentially does not take up water, and thus the XPS material protects from corrosion the metallic support members 44 that are encompassed by XPS at the sides.

A bottom portion of the wall member 40 is preferably secured to a load-bearing surface 52. In Fig. 4 also illustrates a preferred implementation of securing the bottom of the wall member 40. In the arrangement according to the figure, the bottom portion of the support members 44 of the wall member 40 is welded to a connecting member 46 that is preferably a metal plate. The connecting member 46 is secured to the load-bearing surface 52 (that can be the foundation of the building or the ceiling of a lower storey) situated under the wall member 40 by a releasable joint, by way of example, by screws 48. The connecting member 46 is preferably sunk into the material forming the load-bearing surface 52.

If the wall member 40 also comprises one or more slots 42 formed at the bottom portion of the wall member 40, then the wall member 40 can be secured at the bottom applying a common external coupling member 26 that is form-fitted into bottom slots 42 and is adapted to couple the wall member 40 to the permanent insulating formwork. The bottom slots 42 are preferably also produced in the form (mould) applied in the course of the manufacturing process of the wall member 40. Further slots 42 can also be formed at the side faces of the wall member 40. These slots 42 are adapted for securing together the wall members 40 placed beside each other, for example by applying a connection member introduced into the spatial region defined by the lateral slots 42, wherein the internal coupling member 20 can also be applied as the connection member. The lateral slots 42 are preferably also produced in the form (mould) applied in the course of the manufacturing process of the wall member 40.

The spaces for the optional doors and windows are produced in the wall member 40 either in the form (mould) or by post-manufacture cutting, at the desired size and arrangement. This is one of the reasons for arranging the support members 44 relatively far from each other inside the wall member 40, which arrangement allows for disposing doors or windows between the support members 44 without significantly affecting the static properties of the wall member 40.

The support members 44 can also be coupled to a horizontal floor support element arranged in the wall member 40, preferably at the upper portion of the support members 44. Like the support members 44, the support elements are also arranged in the form (mould) before introducing therein the insulating material forming the body of the wall member 40. Before being placed in the form, the support members 44 and the support element can be coupled to each other, for example by means of a screw joint, or, in the case of components made of metal, by welding. The support element is preferably fully encompassed by the insulating material, so no thermal bridge is formed in the wall member 40, even if a support element is made of metal. The support element preferably further increases the load-bearing capacity and strength of the wall member 40, and assists in bearing the weight of the upper floor, furthermore, the support element arranged at the top portion of the wall member 40 also does not prevent the inclusion of doors and windows, while it increases the stiffness of the portion of the wall member 40 situated above the door or window.

The height of the wall member 40 preferably corresponds to the height of the given building storey, by way of example, the height of the wall member 40 is at least 190 cm, preferably at least 250 cm, and more preferably at least 270 cm. The width of the wall member 40 is, by way of example, at least 200 cm, preferably at least 250 cm, more preferably at least 300 cm. The width of the wall member 40 is preferably an integer multiple of the width of the insulating member 10 and/or the formwork member 30. The thickness of the wall member 40 is, by way of example, at least 20 cm, preferably at least 40 cm, more preferably at least 50 cm. Fig. 5 illustrates, in a perspective view, another preferred embodiment of the wall member 40. In Figs. 6A-6C, this embodiment is illustrated in other views; the wall member 40 is shown in Fig. 6A in front view, in Fig. 6B in side elevation view, and in Fig. 6C in top plan view. The disclosure hereinabove, related to Fig. 4, also applies to the features of this embodiment, i.e. this embodiment also has slots 42, a support member 44, and also the manner of securing the wall member 40 to the load-bearing surface 52 is the same, i.e. the securing is performed preferably by applying a connecting member 46 and screws 48. The alternatives disclosed in relation to Fig. 4 can of course also be applied for this embodiment.

In addition to the components included in the embodiment of Fig. 4, the embodiment according to Fig. 5 also comprises a grid 50. The grid 50 is arranged along a vertical direction, such that it connects the support members 44. The grid 50 is preferably adapted to interconnect the support members 44 along their entire vertical length, and is connected to the support members 44 by a releasable joint, for example a screw joint, or by a permanent joint, for example by welding. Like the support member 44, the grid 50 is preferably arranged in the form (mould) in the course of the manufacturing process of the wall member 40, the insulating material introduced into the form encompasses the support members 44 and also the grid 50. The grid 50 is preferably a metal grid or metal mesh, to which - similarly to the support members 44 - it is not necessary to apply a corrosion protection beforehand, provided the insulating material of the wall member 40 is XPS.

During manufacturing of the wall member 40, the grid 50 is encompassed by the insulating material, which also fills the gaps of the grid. Unexpectedly, the grid 50 increases the stability of the wall member 40 and stiffens it, while taking up only a small fraction of space inside the insulating material, and thus it does not deteriorate the insulating properties of the wall member 40. On the other hand, the grid 50 also ensures that the support members 44 do not deviate from the vertical orientation even under the weight of, for example, the ceiling or the upper stories.

The application of the grid 50 also does not prevent the inclusion of doors and windows; on the contrary, at the sections around the doors and windows it is particularly preferable to apply a grid 50 that is adapted for stiffening and stabilizing the insulating material. When the spaces for the doors and windows are prepared, a cut-out of appropriate size has to be made also in the grid 50, either during the manufacturing of the wall member 40, or subsequently by cutting. By surrounding the spaces for the doors and windows, the grid 50 contributes to the stability of the wall member 40, especially at the portion of the wall member 40 situated above the doors and windows. Fig. 7 illustrates, in top plan view, a preferred embodiment of the building structure according to the invention that uses a permanent formwork implemented as a wall base formwork.

The base surface of the building structure is covered by insulating members 10 that are arranged adjacent to each other and are secured together by internal coupling members 20. Along the edges of the base surface, formwork members 30 are abutted on the outermost insulating members 10, such that the slots 32 of the formwork members 30 are situated above the corresponding slots 12 of the insulating members 10 below them, the insulating members 10 and the formwork members 30 are coupled to each other by common external coupling members 26 form-fitting to the slots 12, 32. At the corners of the building structure, the formwork members 30 have to be arranged appropriately, which can be performed by applying a shorter formwork member 30 - that is shorter than the formwork member 30 shown in Fig. 3B by as much as its sideways horizontal extension (as shown in Fig. 3C)-, or by cutting off the corners of the formwork member 30 at 45°.

The wall base formwork thus formed comprises a load-bearing surface 52 formed in the spatial region encompassed by the formwork members 30, which load-bearing surface 52 is implemented in the embodiment according to Fig. 7 as a slab foundation that is preferably made of cast concrete. A portion of the load-bearing surface 52 is indicated in the figure by a closed dashed line.

The connection members 46 adapted for connecting the support members 44 of the wall member 40 are arranged sunk in the load-bearing surface 52. The connecting member 46 is preferably secured to the load-bearing surface 52 also by screws 48. The wall member 40 is the wall member 40 comprising a grid 50 that is depicted in Fig. 5 and Figs. 6A-6C. As can be seen in the figure, the grid 50 adapted to interconnect the support members 44 of the wall member 40 is arranged such that it is connected to the outside face of the support members 44.

The wall members 40 of the opposite walls of the building structure are preferably arranged opposite to each other, such that their respective corresponding support members 44 are situated opposite each other. The top portion of each support member 44 is connected to the top portion of its oppositely situated counterpart by a respective floor beam 54, the floor beams being preferably implemented as metal or reinforced concrete beams. The weight of the upper floor/ceiling is borne by the floor slabs 54 horizontally interconnecting the corresponding support members 44 of the oppositely situated wall members 40. The floor beams 54 are coupled to the support members 44 by releasable or permanent joints.

In Fig. 8, the portion of the building structure according to Fig. 7 is depicted in front elevation view, as seen from the inside of the building structure. The insulating members 10 arranged adjacent to each other on the base surface can be clearly seen in the figure, together with the internal coupling members 20 adapted for coupling them. The internal coupling members 20 are cut to a height (or manufactured to a height) corresponding to the height of the top plane of the insulating members 10. The formwork members 30 arranged abutted on the insulating members 10 have their“flat” sides, situated opposite the slot 32, arranged such that they face the inside of the building structure. The load-bearing surface 52 is not shown in Fig. 8.

Wall member 40 joined to the load-bearing surface 52 comprises support members 44 and a grid 50 connected to the outside face of the support members 44. The support members 44 are secured to the load-bearing surface 52 via connecting members 46 and screws 48.

The slots 42 formed at the top face of the wall member 40 are adapted for connecting the wall member 40 to additional building structure components, preferably for connecting a permanent insulating formwork implemented as a portion of a floor formwork.

Fig. 9 shows a side elevation view of a portion of the building structure depicted in Figs. 7 and 8. In the figure there can be clearly observed a preferred embodiment of the permanent insulating formwork implemented as a wall base formwork that comprises adjacent insulating members 10 that are arranged to contact each other by their lateral faces, internal coupling members 20 adapted for coupling the insulating members 10 to each other, and formwork members 30 arranged abutted on the outermost insulating members 10. The top faces of the insulating member 10 and the internal coupling members 20 are arranged flush with each other, with a load-bearing surface 52 being formed above them, in the spatial region encompassed by the formwork members 30. In the embodiment according to the figure, the load-bearing surface 52 being preferably a slab foundation made of cast concrete.

If the wall member 40 also comprises slots 42 arranged along its bottom face, then the wall member 40 can also be coupled to the permanent insulating formwork by applying a common external coupling member 26 adapted to fit in the bottom slots 42, wherein the common external coupling member 26 is also adapted for securing together the outermost insulating member 10 situated along the edges of the base surface, the formwork member 30, and the wall member 40.

The support member 44 of the wall member 40 is joined to the load-bearing surface 52; the joint is implemented in the preferred embodiment according to the figure by applying a connecting member 46 and screws 48. The connecting member 46 is arranged sunk in the load-bearing surface 52, and is preferably coupled to the support member 44 of the wall member 40 by a welded joint, the connecting member 46 being in turn secured to the load- bearing surface 52 by the screws 48.

A grid 50, arranged vertically in the wall member 40 is applied for coupling the support members 44 of the wall member 40 to each other, and for providing additional stiffening of the wall member 40.

In Fig. 10, a portion of a preferred embodiment of the building structure according to the invention is depicted in top plan view, showing a wall member 40, the lateral formwork of the floor, and the load-bearing surface 52 implemented as a floor.

Abutting on the top face of the wall member 40 comprising the vertically oriented support members 44 and the grid 50 adapted for coupling them to each other, formwork members 30 of a permanent insulating formwork implemented as part of a floor formwork are arranged in such a way that the slots 32 of the formwork members 30 are aligned with the slots 42 of the wall members 40. The formwork member 30 is coupled to the wall member 40 by a common external coupling member 26 adapted to form-fit in the slots 32, 42.

Floor beams 54 are preferably attached to the top end of the support members 44. The support members 44 and the floor slabs 54 are secured together for example by screw joints, or by any other suitable means. Preferably, the wall members 40 of oppositely- situated walls of the building structure are arranged opposite each other, the corresponding support members 44 of the oppositely arranged wall members 40 being horizontally coupled to each other by the floor beams 54 (for example, in the case of metal floor slabs 54, by welded joints). In addition to bearing the weight of the floor, the floor beams 54 also transfer the loads arising from the weight of the floor to the support members 44.

The load-bearing surface 52 implemented as a floor is formed, preferably of cast concrete, in the spatial region surrounded at the sides by the formwork members 30, where the floor beams 54 are encompassed by the concrete at the sides. A temporary horizontal supporting formwork (that can be removed after the load-bearing surface 52 has set) is preferably formed below the plane of the floor prior to casting the concrete.

Fig. 1 1 shows a front elevation view, as seen from the outside of the building, of a portion of the building structure according to Fig. 10. The figure depicts how the building structure comprising the wall member 40 is coupled to the lateral formwork of the floor.

The common external coupling member 26 is form-fitted in the slot 42 of the wall member 40 disposed at the upper portion thereof, and to the slot 32 of the formwork member 30 abutted on the wall member 40. In the preferred embodiment according to the figure, the common external coupling member 26 overhangs the top face of the formwork member 30, which allows the connection of additional building structure components, for example, in the case of a multi-storey building, a wall member 40 provided at its underside with a slot 42, or, in another example, the topmost, closing insulation of the floor, to the common external coupling member 26.

In the case of constructing a multi-storey building structure, the load-bearing surface 52 formed in the spatial region bounded by the formwork members 30 is implemented as an intermediate floor. If the wall member 40 used in the building structure does not comprise a slot 42 arranged along its bottom face, then it is preferred to apply a common external coupling member 26 that is shorter than the one shown in the figure, i.e. reaching up only to the top face of the formwork members 30, or, alternatively, the portion of the common external coupling member 26 that overhangs the top face of the formwork members 30 has to be removed. In such a case, the wall members 40 of the upper storey/ies have to the secured to the wall base formwork and to the load-bearing surface 52 implemented as a slab foundation in the manner put forward in relation to Figs. 7-9.

At the topmost level of the building structure it is preferred to apply, as can be seen also in Fig. 8, common external coupling members 26 overhanging the top face of the formwork members 30, which common external coupling members 26 are adapted to be received by the slots 12 of insulating members 10. The arrangement of the insulating members 10 applied for closing the building structure are illustrated in Figs. 12-14.

When a multi-storey building structure is constructed, it is expedient to produce the wall members 40 of the stories situated above each other such that the support members 44 thereof are situated under each other. Fig. 12 illustrates a preferred embodiment of the arrangement of the insulation adapted for closing a floor/ceiling of the building structure from the top according to the invention. In the figure, those edges of the structural elements that are obstructed from view are shown in dashed lines.

The building structure according to the figure comprises a wall member 40 comprising vertically arranged support members 44 and a grid 50 adapted to interconnect them. In a manner illustrated in relation to Figs. 10-1 1 , a common external coupling member 26 is form-fitted in the slot 42 formed at the top portion of the wall member 40, the common external coupling member 26 preferably overhanging the top face of the formwork member 30 abutting on the wall member 40. The portion of the common external coupling member 26 that overhangs the top face of the formwork member 30 is preferably form-fitted to the slot 12 of the insulating member 10, thereby vertically coupling the insulating member 10, the formwork member 30, and the wall member 40.

The load-bearing surface 52 (not shown in the figure) that is implemented as a floor and is formed around the floor slabs 54 attached to the top portion of the support members 44 is covered by insulating members 10 that are arranged to contact each other by their lateral faces. The outermost insulating members 10 arranged along the edges of the floor are aligned with the common external coupling member 26 by their slots 12. The adjacent insulating members 10 are coupled to each other at the bottom by internal coupling members 20, so the lateral formwork and the top closing insulation of the floor are the vertically mirrored (i.e. reflected through a horizontal plane) counterparts of a permanent thermal insulating formwork implemented as a wall base formwork. As it is essentially impossible for moisture to infiltrate the gaps between the closely-arranged insulating members 10, the insulating members 10 preferably made of XPS also realize water insulation of the floor.

The building structure according to the invention comprising a permanent insulating formwork as a wall base formwork and a portion of a floor formwork, which further comprises a wall structure having external thermal insulation, provides a thermal envelope that fully encompasses the building structure without a thermal bridge. The thermal bridge-free thermal envelope is produced by the insulating members 10 (coupled continuously in a gap- free manner), the shuttering members 30 of the wall base formwork, the external thermal insulation of the wall structure, the formwork members 30 of the floor, and the insulating members 10 covering the floor, which collectively surround the building structure from all sides. Fig. 13 shows a front elevation view, of a portion of the building structure according to Fig. 12, as seen from the inside of the building. In addition to the components illustrated in Fig. 1 1 , in Fig. 13 insulating members 10 aligned with the common external coupling members 26 are also shown. Preferably, the portion of the common external coupling members 26 that overhangs the top edge of the formwork members 30 fits precisely in the slots 12 of the insulating members 10. The insulating members 10 have to be installed upside down with respect to the orientation shown in Fig. 1A. Because the slots 12 of the insulating members 10 do not extend along the entire thickness of the insulating member 10, when seen from above, the building structure has very few fit lines that extend all along the thickness of the insulating members 10.

Fig. 14 shows a side elevation view of a portion of the building structure according to Fig. 12 and Fig. 13. The wall structure of the building structure according to the figure comprises a wall member 40 and a permanent insulating formwork attached thereto that is implemented as a portion of a floor formwork.

A common external coupling member 26 is arranged to be form-fitted in the slot 42 arranged at the top portion of the wall member 40 comprising the support members 44 and the grid 50 coupled to them. The common external coupling member 26 is also adapted to fit in the slot 32 of the formwork member 30 and the slot 12 of the outermost insulating member 10, thus coupling to each other the wall member 40, the formwork member 30, and the outermost insulating member 10.

The uppermost floor of the building structure - like the optionally included intermediate floors - comprises a floor beam 54 connected to the support members 44, and a load- bearing surface 52 around it, implemented as a floor. The temporary horizontal supporting formwork required for forming the load-bearing surface 52 is not shown in the figure. The load-bearing surface 52 is covered by insulating members 10 coupled to each other by internal coupling members 20.

In the preferred arrangement shown in Fig. 14, a thermal envelope made of an insulating material encompassing the building structure remains continuous even where the floor/ceiling is disposed, because the insulating-material body of the wall member 40 is coupled to the formwork member 30 and the insulating member 10 (also made of insulating material) without gaps, i.e. no thermal bridge is formed in the building structure. Because all such optionally included components of the building structure elements that are not made of insulating material are arranged to be embedded in the insulating material, these components do not affect the thermal bridge-free nature of the building structure.

The method for producing the building structure comprising a permanent insulating formwork according to the invention comprises providing a horizontal base surface and covering it with the insulating members 10 of the permanent insulating formwork, arranging the members adjacent to each other such that they are in contact by their lateral faces. Form-fit internal coupling members 20 are placed into the connected spatial regions formed by the slots 12 of the adjacent insulating members 10, the coupling members 20 being applied for coupling to each other the adjacent insulating members 10. Along the edges of the base surface, abutting formwork members 30 are placed on the outermost insulating members 10 such that the slots 12 of the insulating members 10 are vertically aligned with the slots 32 of the formwork members 30, and a common external coupling member 26 adapted to form-fit in the slots 12, 32 is placed therein, wherein the common external coupling member 26 is used for coupling the insulating member 10 to the formwork member 30. A load-bearing surface 52 is then formed, by casting, in the spatial region surrounded at the sides by the formwork members 30, wherein the load-bearing surface 52 is preferably a slab foundation made of cast concrete.

Preferably, a wall structure provided with external insulation that is coupled without gaps to the formwork members 30 is coupled to the load-bearing surface 52, followed by forming a lateral heat-insulating floor formwork, comprising fitting formwork members 30, coupled without gaps to the external insulation of the wall structure, to the top face of the wall structure, and forming, at the level of the top face of the wall structure, a temporary horizontal supporting formwork. A load-bearing surface 52 is then formed as a floor on the temporary horizontal supporting formwork, in the spatial region surrounded at the sides by the formwork members 30. In the case of producing a multi-storey building structure, the load-bearing surface 52 forms an intermediate floor to which a wall structure can be coupled as disclosed above. The above steps of making the wall structure and the floor are repeated as many times as the number of the storeys of the building structure.

The uppermost floor is preferably insulated from the top by using insulating members 10, which comprises covering the floor with insulating members 10 coupled to each other in a form-fit manner by means of internal coupling members 20. The outermost insulating members 10 are then coupled to the formwork members 30 of the floor formwork using the external coupling member 26. The wall structure of the building structure is preferably formed of two or more wall members 40 - described in detail in relation to Figs. 4 and 5 - that have a body made of an insulating material and are arranged beside each other such that they contact each other at their lateral faces. The wall member 40 has a slot 42 adapted to be aligned with the common external coupling member 26 of the formwork; the wall member 40 is coupled without gaps to the corresponding formwork member 30 and insulating member 10 of the formwork by way of the common external coupling member 26. The wall member 40 is preferably also secured to the load-bearing surface 52.

A preferred implementation of the method for producing the building structure according to the invention comprises covering, prior to covering it with the insulating members 10, the horizontal base surface with concrete, thus forming a concrete blinding layer, and laying the insulating members 10 on the concrete blinding layer.

The manner of industrial application of the invention follows from the characteristics of the invention described above. As can be seen from the above, the invention fulfils its objectives in a very advantageous manner compared to the prior art. The invention is, of course, not limited to the preferred embodiments described in detail above, but further variants, modifications and developments are possible within the scope of protection determined by the claims, for example, by way of embodiments comprising further building structure components.

List of reference signs

10 insulating member

12 slot

20 (internal) coupling member

22 vertical cutting surface

24 horizontal cutting surface

26 (external) coupling member

30 formwork member

32 slot

40 wall member

42 slot 44 support member 46 connecting member 48 screw

50 grid

52 load-bearing surface

54 floor beam

Claims

1. A permanent insulating formwork comprising insulating members (10) arranged adjacent to each other and made of an insulating material, the insulating members (10) having vertical lateral slots (12), the slots (12) of adjacent insulating members (10) forming, pair- by-pair, a respective connected spatial region, and the formwork further comprising internal coupling members (20) adapted to be fitted into the connected spatial regions by a form-fit connection and for coupling the adjacent insulating members (10),

characterised in that

the adjacent insulating members (10) are arranged to contact each other by their lateral faces and to cover a base surface, and

the formwork further comprising

- formwork members (30) made of an insulating material and being in abutted contact with the outermost insulating members (10) along the edges of the base surface, the formwork member (30) comprising a vertical slot (32) which is aligned with an external slot (12) of the insulating member (10) being in abutted contact therewith, and the formwork member (30) and the insulating member (10) in abutted contact therewith are coupled to each other by a common external coupling member (26) form-fitted in their aligned slots (12, 32).

2. The formwork according to claim 1 , characterised in that the coupling member (20, 26) is made of an insulating material.

3. The formwork according to claim 1 or 2, characterised in that the insulating member (10), the coupling member (20, 26) and/or the formwork member (30) is made of form- injected insulating material.

4. The formwork according to any of claims 1 -3, characterised in that the insulating material is an extruded polystyrene foam (XPS).

5. The formwork according to any of claims 1-4, characterised in that the formwork is implemented as a wall base formwork, wherein the formwork members (30) are arranged along the edges of the base surface in an abutting manner, above the outermost insulating members (10), and/or the formwork is implemented as a portion of a floor formwork, wherein the outermost insulating members (10) are arranged in an abutting manner above the formwork members (30).

6. The formwork according to any of claims 1 -5, characterised in that the insulating member (10) has a square or rectangular shape in top plan view, wherein a slot (12) is formed at all side faces thereof.

7. The formwork according to claim 6, characterised in that the insulating member (10) comprises one slot (12) on each side, of which the opening width extends to 20-50%, preferably 30-40%, of said side of the insulating member (10), while in the vertical direction the slots (12) extend to at most 10-90%, preferably at most 30-70%, of the thickness of the insulating member (10), and, more preferably, extend to half the thickness of the insulating member (10).

8. The formwork according to any of claims 1-7, characterised in that the slot (12, 32) has an inward widening, preferably dovetail sectional shape.

9. A building structure, characterised by comprising

- the permanent formwork according to claim 1 ,

- a load-bearing surface (52) that is formed by casting in the region surrounded by the formwork members (30) of the permanent insulating formwork, and

- a wall structure provided with external insulation that is supported on the load-bearing surface (52) and is coupled without gaps to the formwork members (30).

10. The building structure according to claim 9, characterised in that the permanent insulating formwork is implemented as a wall base formwork, wherein the formwork members (30) are arranged along the edges of the base surface, in an abutting manner, above the outermost insulating members (10), and/or the permanent formwork is implemented as a portion of a floor formwork, wherein the outermost insulating members (10) are arranged in an abutting manner above the formwork members (30).

1 1. The building structure according to claim 9 or 10, characterised in that the wall structure comprises a wall member (40) with a body made of an insulating material.

12. The building structure according to claim 11 , characterised in that the wall member (40) has a slot (42) that is disposed inside the insulating material body and is adapted to fit against the common external coupling member (26) of the formwork, and the wall member (40) is coupled without a gap, by way of the common external coupling member (26), to the corresponding formwork member (30) of the formwork and to the insulating member (10) that is in an abutted contact therewith.

13. The building structure according to claim 11 or 12, characterised in that the wall member (40) is a load-bearing surface (52) implemented as a floor, and/or it comprises, for bearing the weight the upper storeys, two support members (44) that are arranged along the vertical direction and are encompassed by an insulating material.

14. The building structure according to any of claims 1 1-13, characterised in that the insulating material of the wall member (40) is extruded polystyrene (XPS), and the wall member (40) is made of form -injected insulating material.

15. A method for creating a building structure comprising the permanent insulating formwork according to claim 1 ,

characterised by

comprising the steps of

- providing a horizontal base surface and covering it with insulating members (10) of the permanent insulating formwork and arranging said members adjacent to each other such that they are in contact by their lateral faces,

- placing form-fit internal coupling members (20) into the connected spatial regions formed by the slots (12) of the adjacent insulating members (10), the coupling members (20) being applied for coupling the adjacent insulating members (10) to each other,

- placing abutting formwork members (30) on the outermost insulating members (10) along the edges of the base surface such that the slots (12) of the insulating members (10) are vertically aligned with the slots (32) of the formwork members (30), and placing a form-fit external coupling member (26) into each of these slots (12, 32), each of these common external coupling members (26) coupling an insulating member (10) to a formwork member (30), and

- forming, by casting, a load-bearing surface (52) in the spatial region surrounded at the side by the formwork members (30).

16. The method according to claim 15, characterised by coupling to the load-bearing surface (52) a wall structure provided with external insulation that is coupled without gaps to the formwork members (30), and forming a lateral heat-insulating floor formwork, comprising fitting formwork members (30), coupled without gaps to the external insulation of the wall structure, to the top face of the wall structure, and forming, at the level of the top face of the wall structure, a temporary horizontal supporting formwork, and forming, by casting, a load-bearing surface (52) as a floor on said supporting formwork, in the spatial region surrounded at the sides by the formwork members (30), and repeating the above steps as many times as the number of the storeys of the building structure.

17. The method according to claim 16, characterised by insulating the uppermost floor from above by applying insulating members (10), comprising covering the floor with insulating members (10) that are in form-fit connection with internal coupling members (20), and coupling via the external coupling member (26) the outermost insulating members (10) to the formwork members (30) of the floor formwork.

18. The method according to any of claims 16 or 17, characterised by forming the wall structure of one or more wall members (40) that have an insulating-material body and are secured to the load-bearing surface (52), each wall member (40) having a respective slot (42) adapted to fit against the common external coupling member (26) of the formwork, and coupling, without a gap, the wall member (40) to the corresponding formwork member (30) and insulating member (10) of the formwork by way of the common external coupling member (26).

19. The method according to any of claims 15-18, characterised in that the horizontal base surface is covered with concrete prior to laying the insulating members (10) thereon, the insulating members (10) being laid on the concrete surface.