EP4168638A1 - Coffrage à ductilité renforcée avec cage d'armatures tridimensionnelle repliable - Google Patents
Coffrage à ductilité renforcée avec cage d'armatures tridimensionnelle repliableInfo
- Publication number
- EP4168638A1 EP4168638A1 EP21731976.3A EP21731976A EP4168638A1 EP 4168638 A1 EP4168638 A1 EP 4168638A1 EP 21731976 A EP21731976 A EP 21731976A EP 4168638 A1 EP4168638 A1 EP 4168638A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- leg
- hinge
- arm
- reinforcements
- crutch
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 230000002787 reinforcement Effects 0.000 title claims abstract description 40
- 238000009415 formwork Methods 0.000 title claims abstract description 22
- 230000007246 mechanism Effects 0.000 claims abstract description 36
- 239000000463 material Substances 0.000 claims description 17
- 230000007797 corrosion Effects 0.000 claims description 11
- 238000005260 corrosion Methods 0.000 claims description 11
- 238000009941 weaving Methods 0.000 claims description 8
- 229920002430 Fibre-reinforced plastic Polymers 0.000 claims description 6
- 239000011151 fibre-reinforced plastic Substances 0.000 claims description 6
- 229910000831 Steel Inorganic materials 0.000 claims description 5
- 230000000295 complement effect Effects 0.000 claims description 5
- 239000010959 steel Substances 0.000 claims description 5
- 125000006850 spacer group Chemical group 0.000 claims description 4
- 239000002184 metal Substances 0.000 claims description 3
- 230000003014 reinforcing effect Effects 0.000 claims description 3
- 239000000203 mixture Substances 0.000 description 3
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- 239000002028 Biomass Substances 0.000 description 1
- 244000025254 Cannabis sativa Species 0.000 description 1
- 235000012766 Cannabis sativa ssp. sativa var. sativa Nutrition 0.000 description 1
- 235000012765 Cannabis sativa ssp. sativa var. spontanea Nutrition 0.000 description 1
- 240000007594 Oryza sativa Species 0.000 description 1
- 235000007164 Oryza sativa Nutrition 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 235000009120 camo Nutrition 0.000 description 1
- 235000005607 chanvre indien Nutrition 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000001934 delay Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 239000011487 hemp Substances 0.000 description 1
- 230000002706 hydrostatic effect Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000003071 parasitic effect Effects 0.000 description 1
- 230000000284 resting effect Effects 0.000 description 1
- 235000009566 rice Nutrition 0.000 description 1
- 238000009987 spinning Methods 0.000 description 1
- 239000010902 straw Substances 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
- 239000011800 void material Substances 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B2/00—Walls, e.g. partitions, for buildings; Wall construction with regard to insulation; Connections specially adapted to walls
- E04B2/84—Walls made by casting, pouring, or tamping in situ
- E04B2/86—Walls made by casting, pouring, or tamping in situ made in permanent forms
- E04B2/8635—Walls made by casting, pouring, or tamping in situ made in permanent forms with ties attached to the inner faces of the forms
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B2/00—Walls, e.g. partitions, for buildings; Wall construction with regard to insulation; Connections specially adapted to walls
- E04B2/84—Walls made by casting, pouring, or tamping in situ
- E04B2/86—Walls made by casting, pouring, or tamping in situ made in permanent forms
- E04B2/8658—Walls made by casting, pouring, or tamping in situ made in permanent forms using wire netting, a lattice or the like as form leaves
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B2/00—Walls, e.g. partitions, for buildings; Wall construction with regard to insulation; Connections specially adapted to walls
- E04B2/84—Walls made by casting, pouring, or tamping in situ
- E04B2/86—Walls made by casting, pouring, or tamping in situ made in permanent forms
- E04B2002/8694—Walls made by casting, pouring, or tamping in situ made in permanent forms with hinged spacers allowing the formwork to be collapsed for transport
Definitions
- the invention lies in the field of formwork devices for the implementation of walls for buildings, in particular walls of concrete or of material with high thermal and / or acoustic qualities, or mixed.
- Such formwork is intended for the production of walls regardless of their thickness, in particular:
- the reinforcement cages that equip these sails are generally made using two technologies. Three-dimensional welded cages, and, collapsible cages.
- Welded three-dimensional cages are usually made in the factory. As they have a very large void volume, they require large storage areas and induce unprofitable transport which increases costs and the pollution that goes with it.
- lost formwork with folding reinforcement equipped with filtering grids
- Such formwork is known from documents FR 1103071 (Dauron Institute) and FR 1363602 (Durand Philippe).
- FR 1103071 documents FR 1103071 (Dauron Institute)
- FR 1363602 documents FR 1363602 (Durand Philippe).
- these formworks require the manufacture and implementation of numerous additional parts.
- the mechanism introduces a bending moment, WO 2021/254814 PCT / EP2021 / 065224
- An object of the invention is to provide a lost formwork system which requires fewer parts, in particular fewer parts to be used on the site.
- Another object of the invention is to provide a formwork system which reduces or eliminates parasitic forces which hamper its deployment.
- Yet another object of the invention is to increase the ductility of the structure thus reinforced and boxed.
- the increase in ductility would increase the elastic-plastic zone of the structure and increase the resistance of the structure to failure. This is particularly advantageous for structures that may be subjected to an earthquake or accidental overloads.
- a formwork system comprises two surface reinforcement beds, two formwork grids and at least one articulated mechanism which comprises a leg, an arm and a crutch, assembled as follows:
- a second end of the crutch and a first end of the arm are articulated to each other about a second pivot axis parallel to said first pivot axis;
- a first hinge is formed around the first pivot axis by the corresponding ends and a shooting rod, the shooting rod being fixed with or forming part of a first of the reinforcing beds;
- a second hinge is formed by a second end of the arm and a second shooting rod around a second axis of the arm, the shooting rod being fixed with or forming part of the second bed of reinforcements; and, a third hinge is formed by a second end of the leg and a third spinning rod around a second axis of the leg, the shooting rod being fixed with or forming part of the second reinforcing bed; the leg including:
- Such a system advantageously comprises at least two mechanisms arranged so that the second hinge of one coincides with the third hinge of the other, so that the second pivot axis of one coincides with the third pivot axis of the other. the other.
- This socket is preferably a snap-in socket.
- the arm may have substantially the shape of a triangle comprising two branches which extend by diverging from its first end, each to a respective second end, and preferably, a spacer which connects these second ends together.
- the leg may include two branches which extend by diverging from its first end each to a respective second end.
- the second ends of the leg advantageously comprise complementary lateral rotary engagement means, so that when the system comprises two juxtaposed mechanisms, first lateral rotating engagement means of a mechanism engage with complementary lateral rotary engagement means of the mechanism which is juxtaposed to it.
- the crutch may have substantially the shape of a rectilinear bar between its first end and its second end.
- the arm, leg and / or crutch is made of a material inert to corrosion.
- At least one of the grids may comprise a weave formed of warp threads and weft threads, preferably of a material inert to corrosion.
- Certain warp threads are advantageously regularly replaced by a respective warp reinforcement, of a diameter greater than that of the warp threads and of which the modulus of elasticity is notably lower than that of a steel, preferably of a material inert to corrosion, preferably a fiber reinforced polymer.
- the first end of the leg may be fork-shaped intended to engage either side of a chain brace.
- the grid may comprise weft reinforcements, of a diameter greater than that of the weft son and of which the modulus of elasticity and / or the breaking strength is notably lower than that of a steel, preferably of a material. inert to corrosion, preferably made of a fiber-reinforced polymer, at least some of these weft reinforcements constituting the shooting rods provided to engage the sockets therein. Weft reinforcements can be stapled, welded or glued to the weave.
- At least one of the grids may include an expanded metal.
- FIG. 1 schematically shows a perspective view of a formwork system according to the invention
- FIG. 2 is a transverse elevational view of the system of FIG. 1:
- FIG. 3 is a top view of the system of FIG. 1;
- FIG. 4 is a schematic perspective view from below of an arm for the system of FIG. 1;
- FIG. 5 is a schematic perspective and bottom view of a crutch for the system of Figure 1;
- FIG. 6 is a schematic top and perspective view of a leg for the system of Figure 1;
- FIG. 7 is a view of detail VII of the leg of FIG. 6;
- FIG. 8 is a view of detail VIII of the leg of FIG. 6;
- FIG. 9 is a schematic view of a mechanism for the system of Figure 1, comprising the elements of Figures 4 to 6;
- FIG. 10 is a stack of several mechanisms, of the type of that of FIG. 9;
- FIG. 11 is a detail view of a filter grid for the system of Figure 1;
- FIG. 12 is a view showing a roll of the filter grid detailed in FIG. 11.
- Figures 1 to 3 schematically illustrate a position of use for a formwork system 1 according to the invention for a wall, or veil, vertical.
- Figure 1 illustrates the system 1 in perspective.
- This formwork comprises a set of mechanisms 2 according to the invention, two surface reinforcement beds 3 and filter grids 4.
- the grids 4 are held by the mechanisms and serve as permanent formwork.
- Each reinforcement bed includes a layer 3 of welded mesh.
- the mechanisms 2 form a system of hoops connecting the two plies 3.
- the lattice plies 3 and the grids 4 are mutually parallel.
- each grid defines with the closest reinforcement layer, a volume V whose thickness E, measured perpendicular to the layer, is greater than the coating required by law for protection. reinforcements against corrosion.
- each mechanism 2 is symmetrical with respect to a mechanism plane P2.
- the plane P2 is a vertical plane, parallel to the plane of Figure 2 and perpendicular to the plane of Figure 3.
- Each mechanism 2 comprises a leg 6, an arm 7 and a crutch 8.
- the leg 6 is more precisely illustrated, in perspective, in FIG. 6.
- the arm 7 is more precisely illustrated, in perspective, in FIG. 4.
- the crutch 8 is more precisely illustrated, in perspective, in FIG. 5.
- the arm 7 has substantially the shape of an isosceles triangle. It includes a first end 7A. it also comprises two branches 71 which extend by diverging from this first end 7 A, on either side of the plane P2, each up to a second end 7B. A spacer 72 interconnects the second ends 7B.
- the first end 7A of the arm comprises two tubes 73, facing each other, coaxial about a first axis X7A, together forming a cylindrical inner bearing around this first axis X7A. They form, between their proximal ends, a space 74; The gap 74 has a width D74, measured between the proximal ends, along axis X7A.
- the spacer 72 comprises tubular portions 75 aligned with each other around a second axis X7B, the tubular portions together form a cylindrical inner bearing around the second axis X7B. the tubular sections are separated from each other by notches 76, designed to allow vertical rods of a web 3 to pass, when the arm is in the folded position, against this web.
- the two axes X7A, X7B are mutually parallel, perpendicular to the plane of symmetry P2 and are separated from each other by a distance D7AB. In the configuration of use of Figures 1 to 3, the two axes X7A, X7B of the arm 7 are horizontal.
- the crutch 8 has substantially the shape of a rectilinear bar between a first end 8A and a second end 8B.
- the first end 8 A forms a cylindrical inner bearing around a first axis X8A.
- the second end 8B forms a cylindrical inner bearing around a second axis X8B.
- the two axes X8A, X8B are parallel to each other, perpendicular to the plane of symmetry P2 and are separated from each other by a distance D8AB.
- the second end is intended to be introduced into the space 74 of the arm 7.
- the leg 6 has substantially the shape of a fork. It includes a first end 6A. It also comprises two branches 61 which extend by diverging from this first end 6A, on either side of the plane P2, each up to a respective second end 6B.
- the first end 6A forms a first cylindrical inner bearing around a first axis X6A.
- Each second end comprises a second respective cylindrical bearing 64 around an axis X6B common to the two second bearings 64.
- the two axes X6A, X6B are mutually parallel and together define a plane P6 for the leg, perpendicular to the plane of symmetry P2 of the mechanism 2.
- the axes X6A, X6B are separated from each other by a distance D6AB.
- the first end 6A comprises a first extension 62A which extends the leg 6 beyond the first axis X6A, relative to the second axis X6B.
- This first extension 62 A forms a socket 63, provided for fixing therein a shooting rod 9 disposed substantially parallel to the axes X6A, X6B.
- the socket 63 is a snap-fit socket in a cylindrical housing, open downwardly relative to the leg plane P6.
- Each second end 6B comprises a second extension 62B which extends the leg 6 beyond the second axis X6B, relative to the first axis X6A.
- This second extension 62B forms a socket 63, provided for fixing therein a shooting rod 9 disposed substantially parallel to the axes X6A, X6B.
- the socket 63 is a snap-fit socket in a cylindrical housing, open upwards relative to the leg plane P6.
- the arm, the leg and the crutch are made by injection of a plastic material. Between its ends, each of these parts is lightened, so as to form a substantially iso-stressed part, that is to say that the stresses vary as little as possible along these parts, from one end to the end. other.
- first end 6 A of the leg 6 and the first end 8 A of the crutch 8 are articulated to each other around a first pivot axis XP1 which then merges with the first axis X6A of the leg and with the first axis X8A the crutch;
- the arm 7 and the crutch 8 are substantially coplanar. They form a non-zero angle A2, preferably between forty-five and seventy degrees, with the leg plane P6 of the same mechanism. Preferably, the angle A2 is substantially equal to sixty degrees.
- center distances D7AB, D8AB of the arm and the crutch are equal to each other and to half of the center distance D8AB of the leg, namely:
- a first hinge is formed around the first pivot axis XP1 by the corresponding ends 6 A, 8 A and a horizontal running rod 31.
- the shooting rod 31 is fixed with or forms part of a first layer 3 A among the layers 3;
- a second hinge is formed around the second axis X7B of the arm by the corresponding ends 7B and a horizontal running rod 32.
- the shooting rod 32 is fixed with or forms part of the second ply 3B from among the plies 3; and,
- a third hinge is formed around the second axis X6B of the leg 6 by the corresponding ends 6B and a horizontal running rod 33.
- the shooting rod 33 is fixed with or forms part of the second layer 3B among the layers 3.
- the second hinge of a mechanism 2 is merged with the third hinge of another mechanism 2Y which is immediately associated with it. superimposed, if applicable, and the third hinge of mechanism 2 coincides with the third hinge of another 2Z mechanism to which it is immediately superimposed, if applicable.
- the assembly of the system can be done in the workshop. It can be stored folded in the workshop or on site, which significantly reduces the size of the necessary storage areas. It can also be transported folded up, which significantly increases the efficiency of the reinforcement transport.
- the second bearings 64 of the leg 6 comprise a second right bearing 64D, carried by a panel 61D, on the right in Figure 6, and, a second left bearing 64G, carried by a panel 61 G, on the left in FIG. 6.
- the right and left bearings comprise complementary lateral gripping means 65.
- the right bearing 64D is illustrated, in enlarged view, in FIG. 7.
- the left bearing 64G is illustrated, in enlarged view, in FIG. 8.
- the right rotary engagement means 65D form a male shoulder.
- the left-hand rotary engagement means 65G form a female shoulder designed to fit G male shoulder of a neighboring mechanism 2 into it in an adjusted manner.
- the grid comprises a weaving 40 formed of warp threads 41 and weft threads 42.
- these threads are made of a material inert to corrosion and are woven in a square matrix. , here 9 x 9 millimeters.
- a warp thread 41 out of twelve is replaced by a warp reinforcement 43.
- the warp reinforcements have a diameter greater than that of the wires. warp, so that they have a higher strength than warp threads. They are spaced from each other by a distance D43.
- the chain reinforcements are also made of a material which is inert or protected against corrosion. Preferably, they are made of a fiber reinforced polymer (FRP), the formulation of which is chosen such that their modulus of elasticity is notably lower than that of a steel.
- FRP fiber reinforced polymer
- the weaving 40 can be manufactured on a weaving machine, in the workshop. As illustrated in Figure 12, the weave can be rolled onto a cylindrical drum 44; the chain reinforcements are arranged parallel to the drum. The drum can be adapted to an automated weaving machine. The weave 40 can be stored and transported rolled up; transport and storage are thus optimized.
- the width L40 of the weaving is preferably equal to a storey height. For example, the width L40 can be equal to 2.5 meters, 2.7 meters or 3 meters.
- the grid 4 further comprises weft reinforcements 44. They are advantageously of the same type, in composition and in diameter, as the warp reinforcements 43.
- the weft reinforcements can be stapled, welded or glued. on the warp reinforcements 43. At least some of the weft reinforcements 44 constitute the shooting rods 9 provided to engage therein the grips 63 of the legs 6. Other intermediate weft reinforcements 44 can be added.
- the first extension 62A has the shape of a fork which grips a respective chain reinforcement 43.
- the mechanisms 2 are distributed horizontally in the system 1, according to a horizontal modulus MH equal to twice the distance D43 separating two neighboring weft reinforcements.
- the grid may be wholly or partly made of an oxidizable material capable of receiving an inerting surface treatment, once the structure has been implemented.
- Extensions and grids eliminate the need for formwork wedges.
- the coating thickness around the ply reinforcement is guaranteed by the dimensions of the extensions.
- the grid has a filtering function, which eliminates the hydrostatic pressure in the formwork when it is being filled. Thanks to this, the formwork system according to the invention can be used with many types of filling material, in particular materials based on biomass, such as cob, hemp concrete or rice straw, etc. For such a use, which is generally non-structural, the dimensions of the extensions of the legs of the mechanisms can be adapted. Filler materials can be chosen based on local availability, cost, desired performance, or environmental considerations.
- the grid can be of expanded metal.
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Prostheses (AREA)
- Reinforcement Elements For Buildings (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR2006339A FR3111651B1 (fr) | 2020-06-17 | 2020-06-17 | Coffrage à ductilité renforcée avec cage d’armatures tridimensionnelle repliable. |
PCT/EP2021/065224 WO2021254814A1 (fr) | 2020-06-17 | 2021-06-08 | Coffrage à ductilité renforcée avec cage d'armatures tridimensionnelle repliable. |
Publications (3)
Publication Number | Publication Date |
---|---|
EP4168638A1 true EP4168638A1 (fr) | 2023-04-26 |
EP4168638B1 EP4168638B1 (fr) | 2024-06-05 |
EP4168638C0 EP4168638C0 (fr) | 2024-06-05 |
Family
ID=72470537
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP21731976.3A Active EP4168638B1 (fr) | 2020-06-17 | 2021-06-08 | Coffrage à ductilité renforcée avec cage d'armatures tridimensionnelle repliable |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP4168638B1 (fr) |
FR (1) | FR3111651B1 (fr) |
WO (1) | WO2021254814A1 (fr) |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1103071A (fr) | 1954-04-14 | 1955-10-28 | Siège pour cyclomoteur et autres applications | |
FR1363602A (fr) | 1963-07-05 | 1964-06-12 | Lame de fleuret | |
FR3015994B1 (fr) * | 2013-12-26 | 2018-07-27 | Constance Corp. Sa | Panneau de coffrage tridimensionnel repliable pour voiles structurels et remplissage isolant dans la masse. |
-
2020
- 2020-06-17 FR FR2006339A patent/FR3111651B1/fr active Active
-
2021
- 2021-06-08 EP EP21731976.3A patent/EP4168638B1/fr active Active
- 2021-06-08 WO PCT/EP2021/065224 patent/WO2021254814A1/fr unknown
Also Published As
Publication number | Publication date |
---|---|
FR3111651B1 (fr) | 2022-07-01 |
FR3111651A1 (fr) | 2021-12-24 |
EP4168638B1 (fr) | 2024-06-05 |
EP4168638C0 (fr) | 2024-06-05 |
WO2021254814A1 (fr) | 2021-12-23 |
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