EP1918488A1 - Formwork support device for constructions such as concrete reservoirs - Google Patents

Abstract

The device has a rear reinforcing bar and a front reinforcing bar for supporting rear and front shuttering panels. The rear reinforcing bar and a rod for maintaining in suspension for the front reinforcing bar, are disposed on a base (1). The rod comprises a crosspiece connected to an upper end of the front reinforcing bar and to an upper end of a retrieving element (15) transmitting the forces to the base, where retrieving element is adjustable in length. Independent claims are also included for the following: (1) a formwork system for constructing concrete structures (2) a method for constructing concrete structures.

Description

The present invention relates to a formwork support device in particular for the manufacture of concrete structures as well as a formwork system and a method of manufacturing concrete basins using this device and this system.

The invention will particularly find application in the realization of civil engineering works such as swimming pools, retaining walls or concrete sails to be connected to a horizontal.

The current democratization of pools especially for individual use implies for manufacturers to implement ever more efficient and safe techniques so as to limit the cost price while ensuring a sufficient quality of manufacture.

In this context, it is proposed according to the state of the art to produce concrete basins from lost formwork applied to the walls of the cavity formed to form the pool. The concrete is then sprayed or poured onto the formwork. Such techniques have the advantage of allowing the realization of very varied forms but involve the loss of the formwork.

In addition, techniques have been proposed in which the formwork is reusable as is the case with the document FR A 2,659,592 with an assembly suspended by beams and having a front portion and a rear portion between which the concrete is poured. The front does not go down to the bottom to allow the manufacture of the side walls and the raft in one piece. The front and rear parts are then disassembled and reusable.

The disadvantage of such devices is that their structure is complex due to the suspension by horizontal beams. The horizontal setting is also delicate. It is the same for adjusting the verticality of the front and rear parts and their positioning in depth. In addition, the efforts are fully taken up by the beams from above the basin which poses problems of dimensioning the beams, congestion and shutter access to the volume of the cavity.

There is therefore a need to provide rationalized reusable formwork support structures. The invention falls within this framework and proposes for this purpose a new formwork support device implementing front and rear frames and having a base for mounting the rear frame and a bracket for mounting the formwork. the front frame.

The base advantageously ensures the complete recovery of the forces resulting from the reinforcements. In addition, the stem system allows suspension mounting of the front frame and the transmission of forces to the rear at the base. A one-piece assembly is formed which greatly simplifies the assembly steps. In addition, the proposed system is easily adjustable especially with regard to the verticality and parallelism of the formwork panels.

Other objects and advantages will become apparent from the description which follows, which presents a preferred embodiment of the invention, which is however non-limiting.

• qu'il comporte une base sur laquelle sont montées l'armature arrière et une potence de maintien en suspension de l'armature avant.

Previously it is recalled that the present invention relates to a formwork support device for the manufacture of concrete structures, comprising a rear frame and a front frame capable of supporting formwork panels respectively rear and front between which is poured concrete, characterized by the fact

• it comprises a base on which are mounted the rear frame and a suspension support rod of the front frame.

• la potence comporte une traverse reliée à l'extrémité supérieure de l'armature avant et à l'extrémité supérieure d'un élément de reprise transmettant les efforts à la base.
  • l'élément de reprise est réglable en longueur.
  • l'armature arrière comporte un montant appliqué sur la base et relié à un élément de reprise de transmission d'efforts à la base. Cet élément de reprise étant réglable en longueur.
  • les éléments de reprise se rejoignent à leur extrémité inférieure à une zone d'articulation avec la base.
  • il comporte des moyens de verrouillage de l'armature arrière d'une part sur la base et d'autre part sur la potence.
• l'armature avant comporte une portion coudée à son extrémité inférieure, la portion coudée étant surélevée par rapport à la base pour la coulée de béton vers le fond du bassin.
  • la base comporte un rail encastré dans une semelle en béton.
  • la base comporte un sabot de montage de la potence et de l'armature arrière, le sabot étant réglable en position sur le rail.

According to preferred and nonlimiting variants, this device is such that:

• the stem has a cross member connected to the upper end of the front frame and the upper end of a transfer element transmitting the forces to the base.
  • the recovery element is adjustable in length.
  • the rear armature comprises an amount applied to the base and connected to a force transmission transfer element at the base. This recovery element being adjustable in length.
  • the recovery elements meet at their lower end to an articulation zone with the base.
  • it comprises locking means of the rear frame on the one hand on the base and on the other hand on the gallows.
• the front frame has a bent portion at its lower end, the bent portion being raised relative to the base for pouring concrete to the bottom of the basin.
  • the base has a recessed rail in a concrete footing.
  • the base comprises a mounting shoe of the stem and the rear frame, the shoe being adjustable in position on the rail.

The invention also relates to a formwork system for the manufacture of concrete structures comprising a plurality of shuttering panels and a plurality of devices according to the invention for supporting formwork panels.

The invention finally relates to a method of manufacturing concrete structures in which a rear and front reinforcement cavity is positioned in a cavity to support rear and front formwork panels.

• mise en place de bases en appui sur le fond de la cavité;
• montage d'une armature arrière sur chaque base.
• montage d'une ponte sur chaque base, ladite potence coopérant avec une armature avant pour la suspendre dans la cavité ;
• montage de panneaux de coffrage simultanément ou après le montage des armatures arrière et avant
• coulée de béton entre les panneaux de coffrage.

Characterized by the fact that the following operations are carried out:

• placing bases in abutment on the bottom of the cavity;
• mounting a rear frame on each base.
• mounting a spawn on each base, said stem cooperating with a front frame to suspend it in the cavity;
• assembly of shuttering panels at the same time or after assembly of the rear and front frames
• concrete pouring between the shuttering panels.

• on place une armature entre les panneaux de coffrage avant la coulée.
• on réalise une semelle de béton dans le fond de la cavité, les bases étant encastrées dans ladite semelle.

This method may further comprise the following steps:

• a reinforcement is placed between the shuttering panels before pouring.
• a concrete sole is made in the bottom of the cavity, the bases being embedded in said sole.

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.

Figures 1 to 6 illustrate successive phases of implementation of the invention for the manufacture of a basin.

Figure 7 shows the distribution of devices of the invention on the periphery of the basin to achieve and cooperation with formwork panels.

Referring to Figure 7, we begin by making a cavity that serves as housing pool pool. The basin itself is made of concrete advantageously poured between two formwork surfaces, respectively front and rear. As an indication, there is illustrated a rectangular basin shape with corner portions adapted. A plurality of support devices are distributed over the various edges of the pool. Between their frames 4, 5 are positioned shuttering panels respectively rear panels 25 and front panels 26.

As a preferred example, the formwork panels 25, 26 are wooden panels with a metal frame for cooperation with the edges of the frames 4 and 5. These frames 4, 5 are themselves advantageously metal profiles with vertical flanks adapted to receive the frame formwork panels 25, 26, for example by rails. The invention does not exclude the formation of shuttering panels 25, 26 integral with the frames 4, 5.

According to the invention the support device allows the mounting and the recovery of the forces from the armatures 4, 5 at a base 1 applied to the bottom of the cavity.

Figure 1 shows a basic example 1 advantageously in the form of a rail embedded in a concrete base formed in a preliminary manner in the bottom of the cavity.

The base 1 extends sufficiently forward, and in particular beyond the front frame 5 towards the interior of the cavity to ensure the stability of the support on the ground during operation.

In the case illustrated, the base 1 also comprises a shoe 2 adjustable in position on the rail, in particular by means of adjustable fixing means 3.

The shoe 2 makes it possible to receive a complex assembly consisting of a first recovery element 14 and a second recovery element 15 joining to their lower ends at a hinge zone 20 on the shoe 2.

The assembly thus formed allows the mounting of the rear frame 4 including in particular an amount 12 in the form of metal profile. In the case illustrated in Figure 2, it is secured to the shoe 2 by means of a locking means 8 advantageously removable. In addition, the amount 12 is attached to the resumption element 14 previously mentioned.

The rear formwork panels 25 can then be positioned between two similar support devices. This step is represented in FIG.

Is then reported on this set a cross 13 and the armature 5 formed in the case presented, in one piece.

Of course, one can achieve the cross 13 and the frame 5 into separate parts and assembled without departing from the scope of the invention.

Referring to the example illustrated and in particular to Figure 4, the cross member 13 is fixed at its rear end to the upper end of the recovery element 15. By its front portion, the cross member 13 cooperates with a mechanical assembly welded, with the elements of the frame 5 and in particular an amount 10 and a slash 11 joining at their end lower to a bent portion 7 allowing the formation of the turn between the bottom of the basin and the side walls.

It will be noted that the upright 10 and the slash 11 form a triangulated assembly of high rigidity capable of absorbing the forces resulting from the pouring of concrete between the front and rear formwork panels.

Note also that the recovery element 15 and the cross member 13 form a bracket 6 able to return the forces from the frame before 5 to the base 1 and without impacting the interstitial volume between the formwork panels 25, 26 and without hindering access to the interior volume of the basin. As illustrated in FIG. 4, it is also possible to fasten the upper end of the upright 12 to the cross-member 13. Furthermore, it will be noted that the upper end of the recovery element 15 and the cross-member 13 are securely fixed to allow the transmission of efforts.

For preference, the recovery elements are formed by cylinders, for example helical type comprising a threaded rod cooperating with a threaded body, to allow adjustment of the assembly.

FIG. 5 illustrates the support device as finally mounted and allowing casting of the concrete embedding the reinforcement 21.

The mounting elements of the device are easily accessible from the rear of the pool thus formed which ensures a great ease of disassembly or adjustment. In addition, because of the presence of the bracket 6, the structure of the device bypasses the volume in which the concrete is poured so that the volume of concrete is not traversed by the structure of the device.

Note that the armature 5 does not go down to the bottom and has a bent portion 7 allowing the simultaneous realization of the side walls 23 and the bottom 24 of the basin.

REFERENCES

1.

Based

2.

Shoe

3.

Means of fixation

4.

Rear frame

5.

Front frame

6.

gallows

7.

Angled portion

8.

Locking means

9.

Locking means

10.

Amount

11.

Slash

12.

Amount

13.

crossing

14.

Recovery element

15.

Recovery element

16.

stem

17.

Body

18.

stem

19.

Body

20.

Joint

21.

armature

22.

concrete

23.

Wall

24.

Background

25.

Sign

26.

Sign

27.

Corner

Claims (15)

Formwork support device for the manufacture of concrete structures, comprising a rear reinforcement (4) and a front reinforcement (5) able to support respectively rear (25) and front (26) formwork panels between which is cast from concrete, characterized by the fact - it comprises a base (1) on which are mounted the rear frame (4) and a bracket (6) of the reinforcement retention of suspended before (5). Device according to claim 1 wherein the bracket (6) comprises a cross member connected to the upper end of the front frame (5) and the upper end of a recovery member (15) transmitting the forces to the base (1). Device according to claim 2 wherein the recovery element (15) is adjustable in length. Device according to any one of claims 1 to 3 wherein the rear frame (4) comprises an amount (2) applied to the base (1) and connected to a resumption element (14) for transmitting forces to the base (1). Device according to claim 4 wherein the recovery element (14) is adjustable in length. Device according to claim 2 or 3 in combination with one of claims 4 or 5 wherein the return elements (14,15) join at their lower end to a hinge zone (20) with the base (1) . Device according to any one of claims 1 to 6 comprising locking means (8,9) of the rear frame (4) on the one hand on the base (1) and on the other hand on the bracket (6) . Device according to any one of claims 1 to 7 wherein the front frame (5) comprises an amount (10) and a slash (11) forming a triangulated assembly on the bracket (6). Device according to any one of claims 1 to 8 wherein the front frame (4) has a bent portion (7) at its lower end, the bent portion (7) being raised relative to the base (1) for the pouring concrete towards the bottom of the basin. Device according to any one of claims 1 to 9 wherein the base (1) comprises a rail embedded in a concrete soleplate. Device according to claim 10 wherein the base (1) comprises a shoe (2) for mounting the bracket (6) and the rear frame (4), the shoe (2) being adjustable in position on the rail. Formwork system for the manufacture of concrete structures comprising a plurality of shuttering panels (25, 26) and a plurality of devices according to any one of claims 1 to 11 for their support. A method of manufacturing concrete structures, wherein is positioned in a cavity of the rear frames (4) and front (5) to support rear formwork panels (25) and front (26).
Characterized by the fact that the following operations are carried out: - Establishment of bases (1) resting on the bottom of the cavity; - mounting a rear frame (4) on each base (1). - mounting a bracket (6) on each base (1), said bracket (6) cooperating with a front frame (5) to suspend it in the cavity; - assembly of shuttering panels (25, 26) simultaneously or after assembly of the rear reinforcement (4) and before (5) - Pouring concrete between the shuttering panels (25, 26). The method of claim 13 wherein an armature (21) is placed between the shuttering panels prior to casting. Method according to claims 13 or 14 wherein a concrete sole is made in the bottom of the cavity, the bases (1) being embedded in said sole.

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