WO2014045244A2

WO2014045244A2 - Method for making buildings structures and reinforcement panel

Info

Publication number: WO2014045244A2
Application number: PCT/IB2013/058711
Authority: WO
Inventors: Aronne Miglioranza
Original assignee: Schnell S.P.A.
Priority date: 2012-09-21
Filing date: 2013-09-20
Publication date: 2014-03-27
Also published as: ITBO20120506A1; WO2014045244A3

Abstract

The method for making building structures provides for arranging at least a reinforcement panel (1 ), comprising a slab (2) of filling material, a first sheet (3) of wire netting and a second sheet (4) of wire netting, constrained close to both faces of the slab (2). The panel (1 ) comprises also a series of spacing elements (6) protruding by a determined length from at least a fist face of the slab (2). The panel (1 ) is vertically positioned, then a first forming wall (10) close to the panel (1 ), and a second forming wall close to the panel (1 ), until reaching the abutment of spacing elements (6) protruding from the slab (2). Side edges are positioned, at the shim of the panel (1 ) and the casting of building material is performed. Finally the forming framework is removed, leaving the so-made building structure free.

Description

METHOD FOR MAKING BUILDING STRUCTURES AND REINFORCEMENT PANEL

Technical Field

The present invention regards a method for making building structures and a reinforcement panel for such structures.

Background Art

In the building industry the building technique is known, according to which the load- bearing structure is made up of a load-bearing framework, externally closed by plugging walls. Alternatively to such technique, a building technique is also known, in which the load-bearing structure is made up of walls that are made of reinforced concrete themselves. In this case the walls are usually reinforced with an electrowelded metallic wire net. A construction of such type is called "construction with load-bearing partition walls".

The technique for making buildings of such type provides in fact for leaving perimetral connection irons on a concrete bed on which the sheets of electrowelded wire net are anchored, panels of the formwork are successively placed at opposed sides of the wires Externally to the prearranged walls, so as to create a vane in which the building material is finally "cast".

Once the concrete has achieved the conventional ripening grade, panels are removed from the formwork to leave the so-made walls uncovered. Finally the finishing operations can be performed, such as levelling, covering or painting the obtained load-bearing structures.

The application WO 01/38664 discloses a method and a device for making a prefabricated reinforcing element of known type.

Such a known building, of load-bearing partition walls, offers appreciable results from a structural point of view. Nevertheless the realization of such structures requires high costs, of manpower and materials, due to both the complexity of operations for assembling the reinforcement and to the considerable quantity of concrete used for filling the panels of the formworks. Furthermore an additional problem of such structures is connected to the inadequate thermal and acoustic performances of the load-bearing walls so obtained.

Disclosure

The task of the present invention is that of solving the problems mentioned, devising a method for reinforcing building structures and a reinforcement panel that allows an easy installing, as well as optimal performances. [08] Within such task, it is a further scope of the present invention that of providing a reinforcement panel for reinforced concrete that guarantees a high structural resistance, minimizing installation costs and materials.

[09] A further task of the invention is that of proving a reinforcement panel for reinforced concrete having a simple and functional conception, provided with a surely reliable use, reduced weight, as well as relatively economic cost.

[10] The cited scopes are attained, according to the present invention, by the method for making building structures according to claim 1 , as well as by the reinforcement panel according to claim 3.

[1 1 ] According to the present invention, the method provides for prearranging a reinforcement panel comprising a slab of filling material, preferably foam of the polystyrene type, a first sheet of wire net, preferably electrowelded metal net, and a second sheet of wire net. The panel provides spacing elements inserted transversally to the panel and placed transversally protruding from at least one face of the slab.

[12] A first forming wall is taken close to a first face of the panel and a second forming wall is taken close to the opposed face of the panel, the protruding spaced elements functioning as effective spacers for leaving a free space of predetermined thickness between a respective forming wall and the corresponding face of the slab of the panel. Finally side edges are positioned for laterally closing the forming formwork of the structure, the formwork being open on the upper part.

[13] Building material is the cast, for example concrete of suitable composition, in the above mentioned spaces of determined thickness. After a predetermined ripening time for the building material, the first forming wall, the second forming wall and the side edges are removed, for leaving the bearing structure so-made free.

[14] An advantageous aspect of the invention consists thus in allowing the steady and precise placement of the panel inside the forming formwork, thanks to the presence of the protruding spacing elements that function as effective spacers both in the step of positioning the formwork and in the casting step.

[15] Therefore, reaching the positioning of the panel according to the specific design results very easy, simply by making the mentioned protrusions of the spacing elements, of a determined length, substantially as the thickness of the building material to be made according to the design.

[16] Furthermore, thanks to the spacing elements, drawing the first forming wall and the second forming wall near results particularly easy, by positioning them against the above mentioned protruding connection means. The protruding portions function as abutment for correctly positioning the forming walls, so as to subsequently make a layer of building material of controlled and uniform thickness. According to an advantageous aspect of the invention the reinforcement panel presents spacers protruding by predetermined length at each forming side.

The method and the reinforcement panel according to the invention have the prerogative of reducing to a minimum the amount of building material to be cast for making the building structure, as a considerable quote of the total thickness of the structure is occupied by the reinforcement panel.

Furthermore the structure can be further optimized, if the spacing elements function also as transversal connecting elements of the panel, being inserted transversally to the slab and constrained both to the first wire net and to the second wire net.

Moreover the building structure made according to the method in hand through the use of the panel according to the invention results more performing from a thermo-acoustic point of view, for the presence of the slab of filling material, for example foam of the polystyrene type or another material, easy and strong during the manufacturing, as well as cheaper.

Brief description of Drawings

Details of the invention shall be more apparent from the detailed description of a preferred embodiment of the reinforcement panel for reinforced concrete according to the invention, illustrated for indicative purposes in the attached drawings, wherein:

figure 1 shows a frontal view of the reinforcement panel according to the invention;

figures 2 and 3 show respectively a transversal view of the same reinforcement panel according to the traced planes ll-ll and Ill-Ill illustrated in figure 1 .

Best Mode

With particular reference to figures, the reinforcement panel is indicated with 1 , which is used in the method for reinforcing building structures according to the invention.

The reinforcement panel 1 comprises a slab 2 of filling material, in particular foam material of the polystyrene type and the like. A first sheet 3 of wire net and a second sheet 4 of wire net are arranged opposed, close to both the lateral faces of the slab 2. For example such reinforcement sheets 3, 4 can be made of metallic material or of carbon, glass, basalt, aramid, linen or hemp fibres, woven of steel fibres, or similar materials used in the specific field.

Each sheet 3, 4 has a shape substantially corresponding to the geometrical shape of the slab 2, for example but not only rectangular, however such as to cover the faces of the slab 2. Preferably the first sheet 3 and the second sheet 4 protrude by a respective perimetrical portion 3a, 3b from opposed sides of the slab profile 3, so as to constitute connection edges that can be overlapped with further wire net sheets or other elements, for installing the wall in a manufacturing step, besides for connecting different panels placed side by side. Preferably the first wire sheet 3 and the second wire sheet 4 are made through electrowelding, but equivalent elements can be used as an alternative or in addition.

The panel 1 can moreover comprise a plurality of transversal connection elements 5, made for example of transversal metallic connector threads, welded at respective ends to the same longitudinal or transversal threads of the first sheet 3 and of the second sheet 4 respectively, in order to tighten the slab 2 of filling material between them, in sandwich shape.

Moreover, the panel 1 preferably comprises a plurality of spacing elements 6, distributed on the surface of the slab 2, preferably at each side. More precisely the spacing elements 6, for instance made of metallic threads or rods, are inserted transversally to the panel 1 , so as to protrude by a spacing portion 6a from the respective face of the slab 3. The length of the spacing portion 6a corresponds substantially to the thickness of the concrete that, according to the design, must cover the panel during the realization of the building structure.

Preferably the spacing elements 6 protrude by a respective spacing portion 6a from both the opposed faces of the slab 2.

As an alternative to inserting spacing elements 6 in addition to transversal connection elements 5, it is possible to provide that the latter ones are made at least partially so as to provide themselves with a portion protruding transversally from the slab 2, suitable to function as a spacer with respect to forming walls, as better described in the following. The functioning of the panel according to the invention, as well as the method suitable to use it according to the invention, are understandable from the previous description.

In an initial step a reinforcement panel 1 is prearranged, carrying a series of spacing elements 6 with spacing portions 6a corresponding to the dimensions, in particular to the thickness of the building structure to be made.

Subsequently the panel 1 is placed vertically and conveniently connected through the structural anchoring provided and prearranged for forming the load-bearing partition wall. A first forming wall 10, suitable to form the formwork, is placed against the panel 1 , at a face of the slab 2, for example in front of the first wire net sheet 3. Following this placement, a side of the first forming wall 10 is in abutment against the ends of the spacing portions 6a of the respective spacing elements 6 carried by the panel 1 .

Similarly a second forming wall 1 1 is placed against the opposed face of the panel 1 , in abutment against the spacing portions 6a that protrude from the corresponding face of the panel 1 .

Finally, for completing the confinement of the panel 1 , lateral edges are placed and constrained for closing the forming formwork, at the shim of the panel 1 . The formwork system so assembled will be conveniently shored or braced so as to result steady during the ripening time of the building material used, for example concrete, and to withstand the hydrostatic stresses of the latter.

At this point the forming formwork, composed of the first wall 10, the second forming wall 1 1 and the side closing edges, is opened on the upper part to allow the casting.

Finally the casting of suitable building material is performed, for example of concrete, into the formwork comprising inside the panel 1 placed in a determined and precise way thanks to the presence of the spacing elements 6. In order to assure the uniform distribution of the building material inside the formwork it is possible to apply vibrator means of known type, suitable to distribute the material through vibration, by operating the same at appropriate frequency.

Once the concrete ripening time has passed, the forming walls 10, 1 1 and the side edges can be removed, making the so-made building structure free.

The obtained building structure presents homogeneous external surfaces, suitable to be used immediately or ready for the superficial finishing, such as for example levelling, covering and/or painting.

The method for reinforcing building structures and also the reinforcement panel for reinforced concrete according to the invention attain therefore the scope of allowing an easy installation, reducing at the same time the performing costs and the necessary materials.

In practice, the embodiment of the invention, the materials used, as well as the shape and dimensions, may vary depending on the requirements.

Should the technical characteristics mentioned in each claim be followed by reference signs, such reference signs were included strictly with the aim of enhancing the understanding the claims and hence they shall not be deemed restrictive in any manner whatsoever on the scope of each element identified for exemplifying purposes by such reference signs.

Claims

1 . Method for making building structures, comprising the steps of:

(a) , prearranging at least a reinforcement panel (1 ), comprising a slab (2) of filling material, a first sheet (3) of wire net and a second sheet (4) of wire net, constrained close to both faces of said slab (2), a series of connection elements (5) arranged transversally to said slab (2), constrained to said first sheet (3) and said second sheet (4), so as to tighten between them, in sandwich shape, said slab (2) of filling material, said panel (1 ) further comprising a series of spacing elements (6) shaped by at least a part of said connection elements (5), inserted transversally to said panel (1 ), and protruding by a determined length from at least one face of said slab (2);

(b) . vertically placing said panel (1 );

(c) . placing a first forming wall (10) close to the panel (1 ), at one said face, and a second forming wall (1 1 ) close to said panel (1 ) at the opposed face, until reaching the abutment of said spacing elements (6) protruding from said slab (2);

(d) . prearranging possible further panels (1 ) interconnected with said placed panel (1 ) and proceeding according to steps a), b), and c);

(e) . placing and constraining side edges, at the shim of the panel (1 ) and/or of said further panels, for closing the forming formwork comprising said first wall (10) and said second wall (1 1 );

(f) . performing the casting of suitable building material, inside said forming formwork;

(g) . removing said forming formwork from said panel (1 ) after the ripening of the cast building material, leaving the so-made building structure free.

2. Method according to claim 1 , characterized in that, said step of f). performing the casting of suitable building material inside said forming formwork, comprises the further step of f1 ) operating vibrator means applied to said forming formwork, for homogenously distributing said building material inside said forming formwork.

3. Reinforcement panel for building structures, characterized in that it comprises a slab (2) of filling material, a first sheet (3) of wire net, a second sheet (4) of wire net, arranged close to the opposed faces of said slab (2), a series of connection elements (5) arranged transversally to said slab (2), constrained to said first sheet (3) and to said second sheet (4), so as to tighten between them, in sandwich shape, said slab (2) of filling material, a plurality of spacing elements (6), distributed on at least one face of said slab (2), each carrying an end spacing portion (6a), by a determined length, protruding from said face of said slab (2) for spacing by said determined length said face from a respective forming wall during the manufacturing step of one said building structure, said spacing elements (6) being shaped by at least one part of said connection elements (5), leaving respective ends protruding by said determined length by the corresponding face of said slab (2).

4. Panel according to claim 3, characterized in that said end spacing portions (6a) are inserted protruding from both faces of said slab (2), for spacing, by said determined length, both said faces from respective opposed forming walls during the manufacturing step of one said building structure.

5. Panel according to claim 3 or 4, characterized in that said spacing elements (6) are inserted transversally to said slab in addition to said transversal connection elements (5).