WO2008090075A1 - Formwork for swimming pools - Google Patents

Abstract

The present invention relates to a formwork for the walls of a swimming pool, including a wall (1) having one face in contact with the earth (2) that surrounds the swimming pool and several metallic beams (3) vertically arranged and attached to the wall (1) from place to place, characterised in that a beam (4) made of cast concrete and capable of interacting with the upper portion of the wall (1) and with the metallic beams (3) is used for stabilising the formwork in a horizontal plane. The use of such a formwork with a beam (4) made of cast concrete allows for the fixation of a smooth plate (11) for making a smooth formwork. The walls of the swimming pool, after casting the concreted, are thus smooth and do not require any resurfacing. The invention is essentially intended for swimming pools made of reinforced concrete.

Description

 "FORMWORK FOR SWIMMING POOL"

The present invention relates to a formwork for the construction of the walls of a swimming pool.

The invention will find its application in the construction of pools or basins of reinforced concrete whatever their shape.

The term pool means in the broad sense and includes all types of water features such as ponds, tanks, etc.

Pools of the reinforced concrete type generally have a concrete enclosure cast in place using formwork shaped like the pool.

Patent FR 2,775,714-A1 describes a flexible structure for reinforced concrete pools. The flexible structure allows to adapt to all forms of pools (straight, rounded).

However, this structure has several disadvantages. The flexible nature of the structure leads to uncontrolled corrugations of the formwork during casting and therefore to defects in the shape of the pool.

This results in the use of a greater amount of finishing plaster to make up for defects and achieve a straight finish.

In addition, the concrete is poured between a waterproof wall contiguous to the earth surrounding the pool and a fine mesh. The rendering of the wall is not clear, it is necessary to proceed to a patching phase before performing the aesthetic finish of the walls of the pool. The present invention aims to solve these disadvantages by proposing a formwork for pool walls comprising a wall, one side of which is in contact with the earth surrounding the pool, and several metal beams fixed to the wall, in the direction of the height, of space in place, wherein a beam, based on poured concrete, adapted to cooperate with the upper part of the wall and mechanical beams, is intended to stabilize the formwork in a horizontal plane.

The beam thus forms a frame of concrete surround around the pool. This beam makes the formwork insensitive to any parasitic movement during the entire pouring of the pool or the embankments before pouring. In addition, this beam allows a better comfort for the workers during the pouring of the walls of the swimming pool.

The use of this beam allows the use of a smooth plate for achieving a smooth formwork. Indeed, this smooth plate is held between spacers wedged on the metal beams and a second series of inner metal beams by a rope.

The rope connects the beam to the second series of inner metal beams.

The concrete poured between the wall and the smooth plate will form straight walls that do not require a smoothing phase. Advantageously, the beam comprises a formwork chute and fasteners by connecting the metal beams to the formwork chute, from place to place. Thus, the beam is held by the fasteners used for the connection between the formwork chute and the metal beams.

According to one embodiment, the wall whose one face is in contact with the earth surrounding the pool is a ribbed plate ribbed at regular intervals, extending over the entire height of the sheet and making it rigid in the vertical direction.

According to one embodiment, the formwork chute is mesh or expanded metal so as to create a catch between the concrete of the beam and that of the pool. According to a more advantageous possibility, to form the walls of the pool, the concrete is poured between the wall and a grid after stabilizing the formwork by pouring the beam. In this case, there is always the need to proceed to a patching phase.

According to another more advantageous possibility, the mesh is replaced by a smooth plate held between spacers wedged on the metal beams and a second series of metal beams, by a rope. The pool walls obtained are smooth and plumb for the direct application of the aesthetic finish without intermediate level of patching.

According to preferred variants, the formwork according to the invention is such that: - the beam comprises a formwork chute and fasteners connecting the metal beams to the formwork chute, from place to place.

- The formwork chute has two types of openings: one to let the metal beams enter the space of the beam and one for the fasteners - the formwork chute is mesh, expanded metal or perforated sheet.

- The fasteners are concrete irons, U-shaped inverted one of the branches comprises two successive folds 90 ° to the inside of the U so as to enter the formwork chute of the beam. - The fasteners are attached to the metal beams at the branch of the U unfolded and to the formwork chute of the part at the branch of the U folded. - A smooth plate for making a smooth form is maintained between spacers wedged on the metal beams and a second series of internal metal beams by a rope.

- A rope at the top of the formwork passes successively between the fasteners and connecting rings placed on the inner metal beams.

- A rope, at the bottom of the formwork, passes successively between the metal beams and the inner metal beams.

the smooth plate is a polypropylene or polycarbonate sheet. The present invention also relates to a method of making swimming pool walls comprising placing a wall around a cavity, the fixing of metal beams to the wall in the direction of the height characterized in that a beam located at the top of the wall and metal beams is poured concrete before pouring the rest of the pool.

According to a variant, the method is such that a smooth plate is maintained between the metal beams and a second series of internal metal beams by a rope. Concrete is poured between the wall and the smooth plate, the rope is cut once the concrete is dry, the smooth plate and the second series of metal beams are then removed.

The accompanying drawings are given by way of example and are not limiting of the invention. They represent only one embodiment of the invention and will make it easy to understand.

Figure 1: longitudinal sectional view of the assembly of the formwork according to the invention.

Figure 2: Top view of the formwork according to Figure 1.

Figure 3: View of the formwork chute of the beam.

Figure 4: View of the cooperation between the shuttering chute and the fasteners. Figure 5: View of the formwork chute.

Figure 6: View of the cooperation between the formwork channel of the beam and the mechanical beams. Figure 7: Longitudinal view of the formwork according to the invention comprising the mounting of the smooth wall.

Figure 8: Top view of the formwork according to Figure 7. Other objects and advantages will become apparent from the following description of a preferred embodiment of the invention which is not however limiting.

The present invention relates to a formwork for pool walls comprising a wall (1), one side of which is in contact with the earth (2) surrounding the swimming pool and several metal beams (3) fixed to the wall (1) in the direction of the height, from place to place, characterized in that a beam (4), based on cast concrete, adapted to cooperate with the upper part of the wall (1) and metal beams (3) and intended to stabilize the formwork in a horizontal plane.

Advantageously, the wall (1) is semi-rigid such a metal sheet having ribs shaped battlements extending over the entire height of the sheet. Thus, the wall (1) is flexible in a horizontal plane which gives the possibility to build pools of all shapes. The ribs give rigidity in a vertical plane. On the inner face of the wall (1) (face which is not in contact with the earth (2) and which is inside the pool) are fixed metal beams (3) in the direction of the height of place in place. By height means the dimension in the vertical direction of the walls of the pool. The wall (1) is advantageously impermeable which prevents the moisture of the earth from going up in the walls of the pool.

According to one possibility, the metal beams (3) are triangular section beams comprising three straight irons (16). Two of the irons (16) being connected to the third iron (16) by zigzag-shaped irons (17).

The beam (4) based on poured concrete stabilizes the formwork by sealing the top of the metal beams (3) in a horizontal plane and this to the desired shape for the pool. The beam (4) is cast in concrete prior to the rest of the pool.

By forming a frame of concrete surround around the pool, this beam (4) makes the formwork insensitive to possible movements during the entire casting the pool or embankments before pouring especially to cover the concrete beaches around the pool.

In addition, this concrete beam creates stability comfort when pouring the concrete pump from the rest of the pool. The beam (4) concrete facilitates the realization of the edge of the pool.

Advantageously, the beam (4) comprises a formwork chute (5) and fasteners (6) connecting the metal beams (3) to the formwork chute (5) from place to place.

The shuttering chute (5) rests on the wall (1) and is held by fasteners (6) connecting the metal beams (3) to the shuttering chute (5).

Advantageously, the formwork chute (5) comprises two types of opening: one (7) to let metal beams (3) enter the space of the beam (4) and one (8) for the fasteners ( 6). According to a first possibility, the shuttering chute (5) is made of mesh.

According to a second possibility, the shuttering chute (5) is made of expanded metal or perforated sheet metal.

According to these two possibilities, the materials used lead to create a catch between the concrete of the beam (4) and that of the walls of the pool.

According to one embodiment, the fastening members (6) are inverted U-shaped reinforcing bars of which one (10) of the branches comprises two successive folds at approximately 90 ° towards the inside of the U, so as to enter into the shuttering chute (5) of the beam (4). Other possibilities of shape are possible for the fasteners (6). In particular, the branch of the folded U (10) may have different folding angles of 90 °. For example, the folds may lead to a winding on itself of the fastener (6) in a rounded shape. These fixing members (6) are fixed:

at the level of the branch of the non-folded U (9) to the metal beams (3), - At the branch of the U folded (10) to the formwork chute (5) of the beam (4).

Fixing the fasteners (6) to the metal beams (3) and the beam (4) makes it possible to catch the existing cantilever due to the weight of the beam (4) made of concrete.

According to one possibility, the fasteners (6) are directly connected to the metal beams (3).

That is to say that on the shuttering duct (5) of the beam (4), the locations of the fasteners (6) correspond to the openings (7) of the metal beams (3).

Alternatively, the fasteners (6) are indirectly connected to the metal beams (3) by reinforcing bars (18).

The reinforcing bars (18) connect a fastener (6) to at least one metal beam (3). This possibility is represented in FIGS. 1 to 8.

This provision reinforces the horizontal rigidity of the formwork but may be limiting when manufacturing pools whose walls are not straight.

According to one embodiment, the attachment of the fastener (6) at the formwork chute (5) of the beam (4) is by a staple.

The folds of the branch of the folded U (10) allow the positioning of the shuttering chute (5) relative to the metal beams (3).

The dimensions of the fastener (6), in particular of the folded branch (10) will influence the thickness of the coating of the metal beam (3) by the concrete of the beam (4).

The beam (4) brings stability of the formwork before pouring the walls of the pool and allows the attachment of a smooth formwork to achieve smooth pool walls, requiring no patching phase. The smooth form is made by a smooth plate (11) held between spacers (12) wedged on the metal beams (3) and a second series of inner metal beams (13) by a rope (14). The spacers (12) serve as a plumb wedge on the metal beams (3).

On these spacers comes to rest the smooth plate (11).

Advantageously, this smooth plate (11) is made of a flexible material such as polypropylene or polycarbonate to be able to adapt to the various possible forms of swimming pool.

These materials have, moreover, the advantage of being light and therefore easy to handle.

A second series of inner metal beams (13) is supported on the inner face of the smooth plate (11).

In the upper part of the formwork, a rope (14) successively connects the fasteners (6) to a connecting ring (15) placed on each inner metal beam (13).

According to this embodiment, the branch (10) of the fixing member (6) comprises, as previously described, two successive folds at approximately 90 ° towards the inside of the U. Typically the branch (10) protrudes above the formwork chute (5) and has a 180 ° fold so as to fit again in the formwork chute (5). The rope (14) is thus fixed at the level of 180 ° folding of the branch (10).

In the lower part, a rope (14) successively connects the metal beams (3) to the inner metal beams (13).

The wire-drawing of a rope ensures that the smooth plate (11) exactly follows the profile of the beam (4) and therefore the pool. The present invention also relates to a method of making swimming pool walls comprising:

The establishment of a wall (1) around a cavity

Fixing metal beams (3) to the wall (1) in the direction of height, characterized in that a beam (4) located in the upper part of the wall (1) and metal beams (3) is cast concrete before pouring the rest of the pool.

Advantageously, the method also comprises the steps of placing a smooth plate (11) held between the metal beams (3) and a second series of inner metal beams (13) by a rope (14). The concrete is then poured between the wall (1) and the smooth plate (11).

The space left between the beam (4) and the smooth plate (11) is sufficient to pour the concrete. Advantageously, spacers are wedged on the metal beams (3) to allow the total coating of the metal beams (3).

Once the cast concrete is dry, the ropes (14) are cut and the smooth plate (11) and the second series of inner metal beams (13) are recovered for subsequent uses.

REFERENCES

1. Wall

2. Earth 3. Metal beams

4. Beam

5. Formwork trunking

6. Fixing organs

7. Opening for metal beams 8. Opening for fasteners

9. Branch not folded

10. Branch folded

11. Smooth plate

12. Retractors 13. Second series of internal metal beams

14. Rope

15. Connecting rings

16. Straight irons

17. Zigzag irons 18. Concrete irons

Claims

1. Formwork for pool walls comprising: - a wall (1), one side of which is in contact with the earth surrounding the pool and, - several metal beams (3) fixed to the wall (1), in the direction of the height, from place to place, characterized by the make that : - A beam, based on poured concrete, adapted to cooperate with the upper part of the wall (1) and metal beams (3) is intended to stabilize the formwork in a horizontal plane. 2. Formwork according to claim 1 wherein the beam (4) comprises a shuttering chute (5) and fasteners (6) connecting the metal beams (3) to the shuttering chute (5), from place to place . 3. Formwork according to claim 2 wherein the shuttering chute (5) comprises two types of openings: one (7) to let the metal beams (3) enter the space of the beam (4) and one (8). ) for the fasteners (6). 4. Formwork according to any one of claims 2 or 3 wherein the formwork chute (6) is mesh, expanded metal or perforated sheet. 5. Formwork according to any one of revendications ications2 to 4 wherein the fastening members (6) are concrete irons (18), inverted U-shape of which one of the branches (10) comprises two successive folds 90 ° towards the inside of the U so as to enter the formwork chute (5) of the beam (4). 6. Formwork according to any one of claims 2 to 5 wherein the fastening members (6) are fixed to the metal beams (3) at the branch of the non-folded U (9) and to the formwork chute of the beam (4) at the branch of the U folded (10). 7. Formwork according to any one of the preceding claims wherein a smooth plate (1) for producing a smooth form is maintained between spacers (12) wedged on the metal beams (3) and a second series of internal metal beams. (13) by a rope (14). 8. Formwork according to claim 7 wherein a rope (14), in the upper part of the formwork, passes successively between the fasteners (6) and connecting rings (15) placed on the inner metal beams (13). 9. Formwork according to claim 7 or 8 wherein a rope (14), at the bottom of the formwork, passes successively between the metal beams (3) and the inner metal beams (13). 10. Formwork according to any one of claims 7 to 9 wherein the smooth plate (11) is a polypropylene or polycarbonate sheet. 11. A method of making pool walls comprising: - the establishment of a wall (1) around a cavity - the fixing of metal beams (3) to the wall (1) in the direction of the height, characterized in that a beam (4) located in the upper part of the wall (1) and metal beams (3) is pouring concrete before pouring the rest of the pool. The method of claim 11 wherein: - a smooth plate (11) is maintained between the metal beams (3) and a second series of internal metal beams (13) by a rope (14), - concrete is poured between the wall (1) and the smooth plate ( 11), - the rope (14) is cut, once the concrete dry, the smooth plate (11) and the second series of metal beams (13) are removed.