EP3467224A1 - Calliper formed by two half-callipers provided with nestable male and female arms - Google Patents

Abstract

Stirrup (10) of formwork which comprises: - a first half-stirrup (11) having a female arm (14) in the form of a tubulure (17) terminated by a mortise opening (18) delimited by a flange (19), and - A second metal half-stirrup (12) having a male arm (16) which comprises a pin (21) complementary in section of the mortise (18) and which extends in the extension of the male tubing (20) forming a protrusion from a shoulder (22) which, when the male arm (16) is fitted into the female arm (14), abuts against the rim (19) of the mortise (18).

Description

The invention relates to the field of masonry. It concerns, more precisely, the formwork techniques of vertical carriers (that is to say walls).

It is common that we must sink a post embedded in a masonry wall formed by superimposed rows of blocks. Some blocks have, for this purpose, cells which, when the blocks are superimposed, form a well in which concrete is poured to form the post, without having previously positioned in the well a frame (typically a reinforcement).

Such a post aims to form a stiffener for the wall in which it is embedded, in order to make this wall more resistant to deformations by buckling under the effect of the compressive stresses exerted on it because of the mass supported (generally slab or roof).

It is very useful to consolidate the wall during the pouring of concrete into the well, because, given its viscosity, the lateral pressure exerted by the concrete on the walls of the well is not necessarily uniform. To keep the wall perfectly flat and vertical to the right of the well by avoiding possible shifts between the rows of blocks during the pouring of concrete, it is customary to use a formwork stirrup.

There are several versions of formwork stirrups.

In a first version, the stirrup, U-shaped, is monobloc and comprises two legs connected by at least one (and usually two) spacer (s).

The stirrup is straddled on the wall until a spacer comes to apply on the upper edge of the wall.

The main problem of this stirrup is that its implementation is difficult. It is necessary, under the wall, to have the full height of the stirrup to be able to put it on. An alternative pose is to approach it flat and then to rotate it by sliding the legs on both sides of the wall. But this assumes that there is no obstacle near the well.

In a second version, illustrated on the FIG.9 , the stirrup 100 is formed of two metal half-stirrups, namely a first half-stirrup 110 provided with a leg 120 and a pair of female arms 130 , formed of tubular sections, and a second half-stirrup 140 also provided with a leg 120 and a pair of arms 150 male formed of tubular sections of smaller section than the profiles of the female arms 130 .

To form the stirrup 100, the two half-stirrups 110, 140 are assembled by fitting the male arms 150 into the female arms 130 . The half-stirrups 110, 140 are held together by means of a pin 160 threaded into holes 170 made in the arms 130, 150.

In terms of implementation, this caliper 100 in two parts represents a significant progress compared to a monobloc caliper, because it can be assembled in situ, the half-calipers 110, 140 being plated on both sides of the wall for to be nested one inside the other.

However, this caliper 100 does not go without fault.

When the wall is constrained by the forces due to the casting of the concrete in the well, the legs 120 tend to deviate, thus urging the pin (s) 160 in shear. Over time, repeated stresses can cause fatigue (and possibly breakage) of the pin 160, to the detriment of the quality (and safety) of work.

• Dont la pose soit simple et rapide ;
• Qui, une fois assemblé, présente une bonne rigidité ;
• Qui permette d'accroître la rigidité du coffrage en vue de couler le béton de manière fiable.

The need therefore remains to propose a formwork stirrup:

• Which pose is simple and fast;
• Which, once assembled, has good rigidity;
• That allows to increase the rigidity of the formwork in order to pour the concrete in a reliable way.

• un premier demi-étrier métallique ayant une jambe et au moins un bras femelle qui s'étend perpendiculairement à la jambe au voisinage d'une extrémité supérieure de celle-ci, le bras femelle se présentant sous forme d'une tubulure femelle terminée, à une extrémité libre opposée à la jambe, par une ouverture formant une mortaise délimitée par un rebord, et
• un deuxième demi-étrier métallique ayant une jambe et au moins un bras mâle qui s'étend perpendiculairement à la jambe au voisinage d'une extrémité supérieure de celle-ci, le bras mâle étant propre à s'emboîter dans un bras femelle du premier demi-étrier et comportant une tubulure mâle,

cet étrier étant remarquable en ce que le bras mâle comprend un tenon complémentaire en section de la mortaise du bras femelle et qui s'étend dans le prolongement de la tubulure mâle en formant une saillie à partir d'un épaulement formé sur celle-ci, le tenon étant destiné à être emboîté dans la mortaise jusqu'à la butée de l'épaulement contre le rebord.For this purpose, it is proposed, in the first place, a formwork stirrup which, for the consolidation of a wall during the casting of concrete in it, comprises:

• a first metal half-stirrup having a leg and at least one female arm extending perpendicularly to the leg in the vicinity of an upper end thereof, the female arm being in the form of a completed female tubing; a free end opposite to the leg, by an opening forming a mortise delimited by a flange, and
• a second metal half-stirrup having a leg and at least one male arm extending perpendicularly to the leg in the vicinity of an upper end thereof, the male arm being adapted to fit into a female arm of the first half-caliper and having a male tubing,

this stirrup being remarkable in that the male arm comprises a complementary tenon in section of the mortise of the female arm and which extends in the extension of the male tubular forming a projection from a shoulder formed thereon, the tenon being intended to be fitted into the mortise up to the abutment of the shoulder against the flange.

• Le premier demi-étrier inclut :
  • ∘ Un bras supérieur mâle ;
  • ∘ Un bras inférieur femelle ;
• Le deuxième demi-étrier inclut :
  • ∘ Un bras supérieur femelle dont est complémentaire le bras supérieur mâle du premier demi-étrier ;
  • ∘ Un bras inférieur mâle complémentaire du bras inférieur femelle du premier demi-étrier.

According to a preferred embodiment:

• The first half-stirrup includes:
  • ∘ A male upper arm;
  • ∘ A female lower arm;
• The second half-stirrup includes:
  • ∘ A female upper arm which is complementary to the male upper arm of the first half-caliper;
  • ∘ A male lower arm complementary to the lower female arm of the first half-caliper.

• Les tubulures du bras mâle et du bras femelle présentent une section identique ;
• La section des tubulures est à contour carré ;
• La jambe présente une section à contour rectangulaire ;
• Le côté du contour carré des sections des tubulures est égal au petit côté du contour rectangulaire de la section de la jambe ;
• Le tenon est formé d'un profilé tubulaire emmanché dans la tubulure du bras mâle ;
• Le tenon présente une extrémité chanfreinée ;
• Chaque demi-étrier comprend une platine qui s'étend dans le prolongement de la jambe à partir d'une extrémité inférieure de celle-ci, cette platine étant décalée par rapport à une face coffrante de la jambe ;
• Chaque demi-étrier comprend une cale en saillie sur une face externe de la jambe, propre à accueillir un étai stabilisateur ;

Various additional features may be provided, alone or in combination. For example:

• The tubings of the male arm and the female arm have an identical section;
• The tubing section has a square outline;
• The leg has a rectangular section;
• The side of the square outline of the tubing sections is equal to the short side of the rectangular contour of the section of the leg;
• The post is formed of a tubular section fitted into the tubing of the male arm;
• The post has a chamfered end;
• Each half-stirrup comprises a plate which extends in the extension of the leg from a lower end of this one, this plate being offset with respect to a formwork side of the leg;
• Each half-stirrup comprises a wedge projecting on an outer face of the leg, suitable for receiving a stabilizing stay;

• Une phase de coffrage qui comporte les opérations consistant à :
  • ∘ Positionner, de part et d'autre de la semelle, des banchages obturant l'échancrure ;
  • ∘ Fournir un étrier tel que présenté ci-dessus, avec des platines aux extrémités inférieures des jambes,
  • ∘ Assembler les demi-étriers par-dessus les banchages pour former l'étrier à cheval sur le mur au voisinage du puits tout en maintenant les banchages, en emboîtant chaque bras mâle dans un bras femelle jusqu'à faire buter l'épaulement contre le rebord et en maintenant l'étrier ainsi assemblé au moyen d'un système de fixation ;
• Une phase de bétonnage, qui comprend une opération consistant à couler du béton dans le puits (avec, le cas échéant, pose préalable d'une armature verticale).

Secondly, there is provided a method for producing a concrete embedded column in a well formed in a high wall on a grooved foundation plate provided, in line with the well, with a through notch, which method comprises:

• A formwork phase that includes the operations of:
  • ∘ Position, on either side of the sole, the banchages closing the indentation;
  • ∘ Provide a stirrup as shown above, with turntables at the lower ends of the legs,
  • ∘ Assemble the half-stirrups over the banchages to form the stirrup on the wall in the vicinity of the well while maintaining the banchages, fitting each male arm in a female arm until the shoulder is against the shoulder. flange and holding the stirrup thus assembled by means of a fastening system;
• A concreting phase, which includes an operation of pouring concrete into the well (with, if necessary, prior installation of a vertical reinforcement).

The fastening system is eg. in the form of a clamp mounted tightly on both sides of the stirrup.

It can further be provided a shoring operation by means of stabilizing struts blocked against shims protruding on the half-stirrups.

• la FIG.1 est une vue en perspective éclatée montrant un mur en cours de préparation pour la réalisation d'un poteau noyé, à l'aide d'un étrier de coffrage formé par assemblage de deux demi-étriers ;
• la FIG.2 est une vue en perspective partielle montrant, à plus grande échelle, les extrémités supérieures des deux demi-étriers, respectivement suivant les médaillons II-A et II-B de la FIG.1 ;
• la FIG.3 est une vue en perspective en coupe, montrant le mur coffré ;
• la FIG.4 est une vue de détail en perspective montrant l'étrier assemblé ;
• la FIG.5 est une vue en coupe de l'étrier, selon le plan de coupe V-V de la FIG.4 ;
• la FIG.6 est une vue de détail, à plus grande échelle, prise dans le médaillon VI de la FIG.3 ;
• la FIG.7 est une vue de détail, à plus grande échelle, prise dans le médaillon VII de la FIG.3 ;
• la FIG.8 est une vue similaire à la FIG.3 , illustrant la réalisation du poteau noyé ;
• la FIG.9 est une vue en perspective montrant un étrier de coffrage conforme à une réalisation connue (dans la deuxième version évoquée ci-dessus) de l'art antérieur.

Other objects and advantages of the invention will become apparent in the light of the description of an embodiment, given hereinafter with reference to the accompanying drawings, in which:

• the FIG.1 is an exploded perspective view showing a wall being prepared for the realization of a drilled post, using a formwork stirrup formed by assembling two half-stirrups;
• the FIG.2 is a partial perspective view showing, on a larger scale, the upper ends of the two half-stirrups, respectively according to medallions II-A and II-B of the FIG.1 ;
• the FIG.3 is a perspective view in section, showing the wall;
• the FIG.4 is a perspective detail view showing the assembled stirrup;
• the FIG.5 is a sectional view of the stirrup, according to the sectional plane VV of the FIG.4 ;
• the FIG.6 is a detail view, on a larger scale, taken in the medallion VI of the FIG.3 ;
• the FIG.7 is a detail view, on a larger scale, taken in the medallion VII of the FIG.3 ;
• the FIG.8 is a view similar to the FIG.3 , illustrating the realization of the drowned post;
• the FIG.9 is a perspective view showing a formwork stirrup according to a known embodiment (in the second version mentioned above) of the prior art.

On the FIG.1 is represented a wall 1. This wall 1 is masonry; it is here formed by superposition of rows of blocks 2. The blocks 2 can be blocks of stone or brick, or concrete. According to a particular embodiment, the blocks 2 are concrete blocks of fiber, typically hemp concrete, which contains (as granules) chènevotte.

Each block 2 comprises a groove 3, dug eg. in an upper face, and a tongue 4, which projects from a lower face and can fit snugly without play in the groove 3 of an underlying block 2 .

Some of the blocks 2 are provided with cells 5 which, superimposed, form a well 6 in which it is intended to pour concrete to form a post 7 embedded (that is to say that the pole 7, once formed, is totally included in the wall 1 without being visible from the outside).

According to an embodiment illustrated on the FIG.1 , FIG.3 and FIG.8 , the wall 1 is raised on a grooved foundation flange 8 which, at the right of the well 6, is provided with a notch 9 through to allow the evacuation, during a cleaning of the well 6, any debris so as to allow the post 7 to anchor well on (or in) a base (such as a slab) underlying. The foundation plate 8 is e.g. made of concrete, preferably reinforced.

To consolidate the wall 1 during the pouring of the concrete in the well 6, a stirrup 10 is used, designed to be mounted astride the wall 1, and whose function is to maintain the verticality and the flatness of the wall 1.

• un premier demi-étrier 11 métallique ayant une jambe 13 et au moins un bras 14 femelle qui s'étend perpendiculairement à la jambe 13 au voisinage d'une extrémité 15 supérieure de celle-ci,
• un deuxième demi-étrier 12 métallique ayant une jambe 13 et au moins un bras 16 mâle qui s'étend perpendiculairement à la jambe 13 au voisinage d'une extrémité 15 supérieure de celle-ci.

This stirrup 10 comprises two metal half-stirrups 11, 12 which are intended to be assembled on either side of the wall 1, namely:

• a first calliper half 11 metal having a leg 13 and at least one female arm 14 which extends perpendicular to the leg 13 adjacent to an upper end 15 thereof,
• a second calliper half 12 metal having a leg 13 and at least one male arm 16 which extends perpendicular to the leg 13 adjacent to an upper end 15 thereof.

The female arm 14 is in the form of a completed tubing 17 , at a free end opposite the leg 13, by an opening forming a mortise 18, delimited by a flange 19.

The male arm 16 is configured to fit into a female arm 14 of the first half-caliper 11. The male arm 16 comprises a tubing 20 and a pin 21 which extends in the extension of the tubing 20 forming a protrusion from a shoulder 22 formed thereon.

The post 21 is complementary in section of the mortise 18 of the arm 14 female. The tenon 21 is adapted (and intended) to be fitted into the female arm 14 until the shoulder 22 abuts against the flange 19. The post 21 thus forms a splint which makes it possible to abut accurately and collinearly. the tubings 17, 20 of the male arm 16 and the arm 14 female.

According to a non-illustrated embodiment, the first half-stirrup 11 comprises two superimposed arms 14 , and the second stirrup 12 comprises two superimposed male arms 16 , each adapted to fit into a female arm 14 of the first half-stirrup 11.

• ∘ Un bras 14 femelle tel que décrit ci-dessus, et ;
• ∘ Un bras 16 mâle tel que décrit ci-dessus.

According to a preferred embodiment illustrated on the FIG.2 Each calliper half 11, 12 includes two superimposed arms, namely:

• ∘ A female arm 14 as described above, and;
• ∘ A male arm 16 as described above.

• ∘ Un bras 16 supérieur mâle, tel que décrit ci-dessus ;
• ∘ Un bras 14 inférieur femelle, tel que décrit ci-dessus.

More precisely, in the illustrated example, the first half-stirrup 11 (on the left on the FIG.2 ) includes:

• An upper male arm 16 , as described above;
• ∘ A female lower arm 14 , as described above.

• ∘ Un bras 14 supérieur femelle, tel que décrit ci-dessus et dont est complémentaire le bras 16 supérieur mâle du premier demi-étrier 11, par emboîtement du tenon 21 dans la mortaise 18 jusqu'à ce que l'épaulement 22 vienne buter contre le rebord 19 ;
• ∘ Un bras 16 inférieur mâle, tel que décrit ci-dessus, complémentaire du bras 14 inférieur femelle du premier demi-étrier 11, par emboîtement du tenon 21 dans la mortaise 18 jusqu'à ce que l'épaulement 22 vienne buter contre le rebord 19.

As for the second half-stirrup 12 (right on the FIG.2 ), it includes :

• ∘ A female upper arm 14 , as described above and which is complementary to the upper male arm 16 of the first half-stirrup 11, by interlocking the tenon 21 in the mortise 18 until the shoulder 22 abuts against the rim 19 ;
• ∘ A male lower arm 16 , as described above, complementary to the lower female arm 14 of the first half-stirrup 11, by interlocking the tenon 21 in the mortise 18 until the shoulder 22 abuts against the rim 19.

Each half-stirrup 11, 12 thus has, in plan, a profile in the form of F.

The attachment of the arms 14, 16 on the leg is e.g. performed by welding, preferably to the arc. For the sake of clarity, the weld beads are not shown in the drawings.

In the example shown on the FIG.2 , Tubing 17, 20 of an arm 14 of the arm 16 and female complementary male are identical. According to a preferred embodiment, the section of the tubes 17, 20 has a square contour. In practice, the tubes 17, 20 are e.g. metal profiles (typically steel, possibly painted or coated). We denote A the side of the section, equal to the distance between two opposite external faces.

The value of A is eg. about 40 mm.

The stud 21 is advantageously formed of a tubular section fitted into the tubing 20 of the male arm 16 . The tubular profile used for the realization of the tenon 21 is lower and the complementary section of the interior of the tubing 20 male (and hence the tubing 17 female). Fixing the pin 21 to the male pipe 20 is preferably made by welding, e.g. by spot welding.

According to a preferred embodiment, the pin 21 has a chamfered end 23 , so as to facilitate its insertion into the mortise 18 of the corresponding female arm 14 .

In the example shown on the FIG.2 , we see that the arms 14, 16 of the two half-stirrups 11, 12 are presented head to tail, the interlocking of the upper male arm 16 of the first half-stirrup 11 in the female upper arm 14 of the second half-stirrup 12 being simultaneous with the interlocking of the lower male arm 16 of the second half-stirrup 12 in the lower arm 14 of the first female half-stirrup 11.

When these interlockings are complete, the shoulders 22 abut against the edges 19 of the mortises 18 ; the upper arms 14, 16 and the corresponding lower arms 16, 14 respectively form two spacers 24, 25 of the same length which guarantee the parallelism of the legs 13.

For this purpose, the female tubules 17 are of equal lengths, and the male tubings 20 are also of equal lengths.

The leg 13 of each half-stirrup 11, 12 preferably has a section with a rectangular contour, to offer good resistance to bending stresses in the plane of its largest dimension (that is to say in a perpendicular vertical plane). on the wall 1).

B and C respectively denote the small side and the long side of the rectangular contour of the section of the leg 13. The small side B can be measured on an inner face of the leg 13, said face 26 formwork, from which extend arms 14, 16, or on an opposite outer face 27 .

According to a preferred embodiment, the side A of the square contour of the sections of the tubes 17, 20 is equal to the small side B of the rectangular contour of the section of the leg 13 : $$\mathrm{AT}=\mathrm{B}$$

According to one embodiment, the short side B is approximately 40 mm.

The big side C is eg. about 60 mm.

Each half-stirrup 11, 12 advantageously comprises a wedge 28 projecting on the external face 27 of the leg 13. The wedge 28 is shaped to be able to receive a stabilizing strut 29 , when the stirrup 10 is in place on the wall 1 ( FIG.3 , FIG.6 , FIG.8 ).

Furthermore, at least one of the half-stirrups 11, 12 (the first half-stirrup 11 in the example of the FIG.2 ) can be provided with a tab 30 forming a clean heel to be wedged against an inner face of the groove 3 of the block 2 of the upper row of the wall 1, so as to provide a good wedging of the half-caliper 11 while the second half-stirrup 12 is put in place to be assembled to the first half-stirrup 11.

In addition, according to an embodiment illustrated on the FIG.3 and FIG.7 Each calliper half 11, 12 comprises a plate 31 which extends in the leg extension 13 from a lower end 32 thereof, this plate 31 being offset from the face 26 of the formwork leg. This plate 31 is intended to ensure the setting of a bunch 33 closing the notch 9.

• Un tasseau 34 (par ex. en bois) dont la hauteur est égale à celle de la semelle 8 de fondation, et dont l'épaisseur est égale à la surépaisseur formée par les parpaings 2 par rapport à la semelle 8 ;
• Une banche 35, qui se présente sous forme d'un panneau (par ex. en bois) dont l'épaisseur est égale à l'écart entre la platine 31 et la face 26 coffrante de la jambe 13.

When, as in the illustrated example where the blocks 2 are of greater width than that of the base 8 of foundation and form on both sides of it an extra thickness, the bunch 33 comprises, on both sides of the wall 1 and for each half-stirrup 11, 12 :

• A cleat 34 (eg of wood) whose height is equal to that of the base 8 of foundation, and whose thickness is equal to the extra thickness formed by the blocks 2 relative to the sole 8 ;
• A panel 35, which is in the form of a panel (eg wood) whose thickness is equal to the gap between the plate 31 and the formwork face 26 of the leg 13.

The realization of the post 7 embedded in concrete in the well 6 comprises a formwork phase followed by a concreting phase.

The formwork phase comprises a first operation of positioning, on either side of the sole 8, the banchages 33 to close the notch 9 ( FIG.1 ). For this purpose, in the illustrated example, the cleats 34 are placed on either side of the notch 9, and the cleats 34 are then wedged by means of the panels 35 (FIG. FIG.3 ).

A second operation consists of supplying (or withdrawing from a stock or a stock) a stirrup 10 as presented above, the half-stirrups 11, 12 of which, still separated, are provided with plates 31 at the lower ends of the legs 13.

A third operation is to assemble the half-stirrups 11, 12 over the banchages 33 to form the stirrup 10 straddling the wall 1 in the vicinity of the well 6 (and, more specifically, the edge of the well 6 to allow the casting of the concrete) while maintaining the banchages 33. The operator must ensure that the legs 13 run vertically along the well 6. A plumb line (or a laser level vertical brush) can, for this purpose, be useful. As we see on the FIG.7 , each banche 35 are wedged between the wall 1 and the plate 31, in the extension of the face 26 of formwork.

Each male arm 16 is fitted into a female arm 16 (the pin 21 being fitted into the mortise 18 ) until the shoulder 22 is abutted against the rim 19. Consequently, the upper arms 14, 16 and the arms 16, 14 lower together form the spacers 24, 25 superimposed maintaining the parallelism of the legs 13.

It is however necessary to keep the half-stirrups 11, 12 assembled, to ensure the holding in place of the stirrup 10.

For this purpose, the stirrup 10 thus assembled is held by means of a fastening system which, in the illustrated example, is in the form of a clamp 36 mounted on either side of the stirrup 10 (preferably at mid-height under the lower arms 14, 16 , so as to distribute the forces between the struts 24, 25, stressed in buckling, and the legs 13, biased in bending).

The formwork phase can include, as illustrated on the FIG.3 , a shoring operation by means of struts 29 stabilized against the shims 28. The struts 29 may also support the ground, or against a neighboring wall ensuring the recovery efforts.

Once assembled and stirrup 10, which guarantees the flatness and verticality (in other words, the plumb) of the wall 1 to ensure the straightness (and verticality) of the well 6, the concrete phase can be engaged .

This concreting phase which includes a concrete pouring operation in the well 6 ( FIG.8 ). According to a preferred embodiment, illustrated on the FIG.3 , the concrete phase comprises, prior to pouring the concrete, the installation of a frame 37 vertical.

During casting of the concrete, the wall 1 is subjected to stresses resulting from the nonuniform pressure that the concrete exerts on the walls of the well 6 because of its viscosity (that is to say that the air-interface concrete is not horizontal). However the stirrup 10 supports the wall 1 to maintain its position.

• d'une part, au fait que les tubulures 17, 20 aboutées présentent une section constante, l'interface épaulement 22-rebord 19 transmettant les efforts de manière uniforme entre chaque bras 16 mâle et le bras 14 femelle correspondant, et,
• d'autre part, à la présence, à l'interface épaulement 22-rebord 19, du tenon 21 qui, outre sa fonction d'éclissage, remplit une fonction de raidisseur en raison de la surépaisseur de matière qu'il procure.

The clamping of the half-stirrups 11, 12 by means of the clamp 36 places the spacers 24, 25 in compression in their length (that is to say transversely with respect to the wall 1 ) and therefore solicits them in buckling. But the arms 14, 16 are particularly resistant to buckling, thanks to:

• on the one hand, the fact that the abutments 17, 20 abutments have a constant section, the shoulder interface 22- rebord 19 transmitting the forces uniformly between each male arm 16 and the corresponding female arm 14 , and,
• on the other hand, at the presence, at the shoulder interface 22-flange 19, the pin 21 which, in addition to its splicing function, performs a stiffener function due to the extra thickness of material it provides.

As already mentioned, the rectangular section of the legs 13 increases their resistance to bending under the lateral thrust of the wall 1 due to the non-uniform pressure of the concrete poured into the well 6.

Those skilled in the art will understand that it is appropriate to adapt the length of the half-stirrups 11, 12 to the height of the wall. For the casting of a post into a wall (used for example as property delimitation), the use of struts 29 may be superfluous. In this case, the legs 13 are of short length and the shims 28 are not necessary. On the other hand, for the casting of a post 7 in a wall 1 of dwelling, the use of the struts 29 may be indispensable, and the presence of the wedges 28 is then necessary, while the length of the legs 13 must be adapted to the height of the wall 1. Thus, for a wall 1 of standard house, the leg 13 is about 2.2 m long, to which should be added the height of the plate (which is typically about 0.2 m).

As can be seen on the FIG.7 , the plate 31 may be provided with holes 38 for the passage of screws or nails for securing the formwork 33.

Claims (14)

Formwork stirrup ( 10 ) which, for the consolidation of a wall ( 1 ) during the pouring of concrete therein, comprises: a first metal half-stirrup ( 11 ) having a leg ( 13 ) and at least one female arm ( 14 ) extending perpendicularly to the leg ( 13 ) in the vicinity of an upper end ( 15 ) thereof. , the female arm ( 14 ) being in the form of a completed female tubing ( 17 ) at a free end opposite the leg ( 13 ), by a mortise opening ( 18 ) defined by a flange ( 19 ), and a second metal half-stirrup ( 12 ) having a leg ( 13 ) and at least one male arm ( 16 ) extending perpendicularly to the leg ( 13 ) in the vicinity of an upper end thereof, the arm ( 16 ) male being adapted to fit into a female arm ( 14 ) of the first half-stirrup ( 11 ) and comprising a male tubing ( 20 ), this stirrup ( 10 ) being characterized in that the male arm ( 16 ) comprises a stud ( 21 ) complementary in section of the mortise ( 18 ) of the arm ( 14 ) female and which extends in the extension of the tubing ( 20). male protruding from a shoulder ( 22 ) formed thereon, the pin ( 21 ) being adapted to be fitted into the mortise ( 18 ) of the female arm to the abutment of the shoulder ( 22 ) against the flange ( 19 ). Formwork stirrup ( 10 ) according to claim 1, characterized in that : - The first half-stirrup ( 11 ) includes: ∘ An upper male arm ( 16 ); ∘ A female lower arm ( 14 ); - The second half-stirrup ( 12 ) includes: ∘ An upper female arm ( 14 ) which is complementary to the upper male arm ( 16 ) of the first half-stirrup ( 11 ); ∘ A male lower arm ( 16 ) complementary to the lower female arm ( 14 ) of the first half-caliper ( 11 ). Caliper ( 10 ) according to claim 1 or claim 2, characterized in that the tubings ( 17 , 20 ) of the arm ( 16 ) male and the arm ( 14 ) female have an identical section. Caliper ( 10 ) according to one of the preceding claims, characterized in that the section of the tubes ( 17 , 20 ) has a square contour. Caliper ( 10 ) according to one of the preceding claims, characterized in that the leg ( 13 ) has a section with a rectangular contour. Caliper ( 10 ) according to claims 4 and 5, taken in combination, characterized in that the side of the square contour of the sections of the tubes ( 17 , 20 ) is equal to the short side of the rectangular contour of the section of the leg ( 13 ) . Caliper ( 10 ) according to one of the preceding claims, characterized in that the pin ( 21 ) is formed of a tubular section fitted into the tubing ( 20 ) of the arm ( 16 ) male. Caliper ( 10 ) according to one of the preceding claims, characterized in that the pin ( 21 ) has a chamfered end ( 23 ). Caliper ( 10 ) according to one of the preceding claims, characterized in that each half-stirrup ( 11 , 12 ) comprises a plate ( 31 ) which extends in the extension of the leg ( 13 ) from one end ( 32 ) lower thereof, the plate ( 31 ) being offset from a face ( 26 ) formwork of the leg ( 13 ). Caliper ( 10 ) according to one of the preceding claims, characterized in that each half-stirrup ( 11 , 12 ) comprises a shim ( 28 ) projecting on an outer face ( 27 ) of the leg ( 13 ), suitable to accommodate a strut ( 29 ) stabilizer. Method for producing a post ( 7 ) embedded in concrete in a well ( 6 ) formed in a wall ( 1 ) raised on a grooved foundation flange ( 8 ) provided, in line with the well ( 6 ), with an indentation ( 9 ), the method comprising: - A formwork phase that includes the operations of: ∘ Position, on either side of the sole ( 8 ), banchages ( 33 ) closing the notch ( 9 ); ∘ Provide a stirrup ( 10 ) according to claim 9, ∘ Assemble the half-stirrups ( 11 , 12 ) over the banchages ( 33 ) to form the stirrup ( 10 ) straddling the wall ( 1 ) near the well ( 6 ) while maintaining the banchages ( 33 ) , by fitting each male arm ( 16 ) into a female arm ( 14 ) to abut the shoulder ( 22 ) against the flange ( 19 ) and maintaining the bracket ( 10 ) thus assembled by means of a system ( 36 ) for fixing; - A concreting phase, which comprises an operation of pouring concrete into the well ( 6 ). The method of claim 11, which comprises a step of placing a frame ( 37 ) vertically in the well ( 6 ), before the casting operation of the concrete. A method according to claim 11 or claim 12, wherein the fastening system ( 36 ) is in the form of a clamp mounted tightly on either side of the stirrup ( 10 ). Method according to one of claims 10 to 13, which comprises a shoring operation by means of struts ( 29 ) stabilized against shims ( 28 ) projecting on the half-stirrups ( 11 , 12 ).

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