EP1133605B1 - Verlorene schalung und die verwendung als füllkörper und gewölbe - Google Patents

Verlorene schalung und die verwendung als füllkörper und gewölbe Download PDF

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Publication number
EP1133605B1
EP1133605B1 EP99954070A EP99954070A EP1133605B1 EP 1133605 B1 EP1133605 B1 EP 1133605B1 EP 99954070 A EP99954070 A EP 99954070A EP 99954070 A EP99954070 A EP 99954070A EP 1133605 B1 EP1133605 B1 EP 1133605B1
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EP
European Patent Office
Prior art keywords
wall
floor
concrete
floor block
interjoists
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.)
Expired - Lifetime
Application number
EP99954070A
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English (en)
French (fr)
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EP1133605A1 (de
Inventor
Jean Roux
Christian Herreria
Jean-Paul Py
Farid Sahnoune
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Bedaricienne Doras Industries
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Bedaricienne Doras Industries
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Application filed by Bedaricienne Doras Industries filed Critical Bedaricienne Doras Industries
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    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B5/00—Floors; Floor construction with regard to insulation; Connections specially adapted therefor
    • E04B5/16—Load-carrying floor structures wholly or partly cast or similarly formed in situ
    • E04B5/17—Floor structures partly formed in situ
    • E04B5/23—Floor structures partly formed in situ with stiffening ribs or other beam-like formations wholly or partly prefabricated
    • E04B5/26—Floor structures partly formed in situ with stiffening ribs or other beam-like formations wholly or partly prefabricated with filling members between the beams
    • E04B5/261—Monolithic filling members
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B5/00—Floors; Floor construction with regard to insulation; Connections specially adapted therefor
    • E04B5/16—Load-carrying floor structures wholly or partly cast or similarly formed in situ
    • E04B5/17—Floor structures partly formed in situ
    • E04B5/23—Floor structures partly formed in situ with stiffening ribs or other beam-like formations wholly or partly prefabricated
    • E04B5/28—Cross-ribbed floors

Definitions

  • the present invention relates to the field of construction and building, and more particularly lost formwork elements which an application is constituted in the construction of floors, by interjoists and end eardrums.
  • Lost formwork elements are elements which, when associated with each other, delimit a volume in which a concrete is poured and which remain associated with concrete, this one once taken to form a coating.
  • Document CH-A-449 904 discloses a formwork lost for construction in reinforced concrete which is in matter plastic, thin-walled and ribbed on one side - As described, this product does not exhibit fire resistance.
  • thermoplastic material such as polyethylene, polypropylene, polyvinyl chloride (PVC) or polyethylene terephthalate (PET) and their derivatives, which can be produced by molding (injection) in various forms.
  • the subject of the invention is an element of lost formwork for a concrete structure that is realized in a flammable thermoplastic material, shaped in thin walls, and consistent with the characterizing part of claim 1.
  • the optimal qualities of the material with regard to the fire is obtained on the one hand, when the reliefs have dimensions (height, width ...) which are of the order of the average thickness of the wall on one side of which they are spared and secondly to the extent that the the surfaces of the reliefs perpendicular to the aforementioned face of the element is minimal, just necessary for demolding of the element during its manufacture. It was also realized that, if the qualities of resistance mechanical allow, the thickness of the wall (basic that is to say with the exception of the reliefs) is weak, best are the qualities of the product with regard to the fire.
  • the thickness of the base wall is included between 1.5 and 2.5 mm while the reliefs are formed preferably by parallel and / or intersecting ribs of height between 0.8 and 2 mm and also between 0.8 and 2 mm with a pitch or a spacing between 8 and 10 mm.
  • the surface condition of the element on its face next to the concrete will be advantageously rough in order to create micro asperities that promote intimate contact between the concrete and the formwork element.
  • These micro roughnesses will be obtained by surface treatment (mechanical or chemical) walls of the injection mold.
  • An interesting application of the element according to the invention consists of a interjoists for the realization of building floor in association with two joists at prestressed heel or reinforced concrete and parallel.
  • the wall of the interjoists is limited by two parallel longitudinal edges and two transverse edges end and this wall affects a general shape bent around a direction parallel to these two edges longitudinal, with its textured side convex side, this wall having a view of this convex side, depressions transverse parallels evenly spaced others that define a succession of compartments in open boxes on the concave side.
  • This tympanum has a wall substantially vertical whose external profile is similar to the profile of a cross section of a interjoists, equipped with one side of a horizontal sole at level of the underside of the beam and the other side of a gutter housing the end of the last enter the bay.
  • the textured side of this tympanum is that which is in continuation of the concave face of the gutter.
  • Figures 1 to 3 are partial diagrams of a formwork element according to the invention, viewed from the of their surface intended to be in contact with the concrete.
  • the material used will preferably be polypropylene but can also be polyethylene, polyvinyl chloride vinyl or a PET.
  • the element according to the invention has a base wall P whose thickness is denoted e in the figures and whose face F is provided with reliefs R.
  • these reliefs are simply constituted by parallel ribs whose width l may vary for example between 1.2 and 3 mm.
  • the height h of these grooves can vary from 0.8 to 1.2 mm, the thickness e of the base plate being of the order of 1.5 to 2.5 mm.
  • the pitch between the ribs is between 8 and 10 mm and, in the case of Figures 1 to 3 equal to 8 mm.
  • the reliefs R are formed by a network of intersecting ribs which define nodes N1, N2, which are sometimes at a maximum altitude relative to the surface F, sometimes to a minimum.
  • the thickness e of the plate is of the order of 2.5 mm
  • the mesh represented has a dimension of 8 mm
  • the altitude of the lower nodes N2 is of the order of 0.8 to 1 mm while the The altitude of the upper nodes is about 2 mm above the surface F.
  • the thickness of these ribs is in the variable figure with a maximum in the vicinity of the lower nodes N2 and a minimum in the vicinity of nodes N1 higher. In the example under consideration, this thickness varies between 0.8 and 1.2 mm.
  • the surface F of the element P and the upper surfaces of the reliefs have a rough appearance resulting for example from a treatment either chemical or mechanical injection mold of which take out these formwork elements.
  • This rough appearance has for the sake of improving the contact of concrete and the formwork element.
  • the realized reliefs have dimensions that are of the order the thickness of the base wall P of the element.
  • the thickness of this base wall will not be greater than 2.5 mm, even if it is ribbed and consistent to behave like the elements in caissons if the mechanical constraints that must supporting these formwork elements require it.
  • This thickness of 2.5 mm was determined by calculation and verified experimentally: beyond that, it seems that the role of heat sink of the concrete compared to siding is reduced and that the qualities of the material to be fire and its spread are clearly decreased.
  • a floor consists of a series of T-beams or heel, parallel, usually prestressed concrete or armed, between which we set up a filling - intertwined everything is then covered with a compression table made of cast concrete with a metal frame.
  • the spacing between two beams fixed by the constructor and adapted to the width of interjoists the order of 60 to 70 cm).
  • the length of the interjoists can to be equal to a few meters if this interview is in light material such as polystyrene or 20 to 25 cm if the interjoists are made of concrete. This dimension is dictated by the weight of the interjoists which is usually handled at the hand on the construction site.
  • interjoists are made under form of hollow boxed and partitioned elements the thickness is between 8 and 25 cm, each edge longitudinal interjoists coming to rest on the heel of a T-joists. These are bulky elements and heavy whose transport is penalizing. Like the concrete interjoists are small in size to be weight compatible with manual handling, it have to carry a lot to make a floor.
  • this wall is limited by two edges parallel longitudinal and two transverse edges end and affecting a generally curved shape around of a direction parallel to its longitudinal edges, this wall having, seen from its convex side, depressions transverse parallels evenly spaced others that define a succession of compartments in open boxes on the concave side.
  • interjoists have properties particularly interesting with regard to fire and its spread like the lost formwork element exposed above.
  • the texturing of its convex surface constitutes plus an anti-slip function for workers who circulate on the interjoists.
  • FIGS. 4 to 7 there is shown by two exterior views convex surfaces ( Figure 4) and concave (FIG. 7) of a wall 1 of constant thickness which is this interview.
  • This wall 1 limited by two longitudinal edges 2 and 3, is usually bent around a direction parallel to these two edges.
  • a value possible thickness of the wall is about 2 mm.
  • This wall has transverse deformations 4 which appear as depressions on the side convex and in the form of ribs on the concave side of them. These depressions or ribs define a compartmentalization of the interjoists which is then under form of compartments 5 open on the concave side.
  • each compartment is planar with, viewed from the convex side, a central recess 6 provided with a grid array of ribs 7 ( Figures 4 and 6).
  • the surface of the interjoists is worked in order to increase its roughness and therefore the surface that will be in contact with the concrete of the compression plate to promote its anchoring to this concrete.
  • This texturing can affect various shapes: pimples arranged next to each other, pimples whose head is crushed to form a mushroom, a tight grid, a tight grid whose top of the ribs is also crushed to create against undercut surfaces forming retention concrete, more or less closely spaced grooves ...
  • the standard longitudinal dimension of a interjoists may for example correspond to 1.20 m or 1.50 m with a compartment width measured at the bottom of depression 4 equal to 150 mm.
  • the longitudinal connection of two interjoists and the sealing between them with respect to the concrete is provided by, for example, the overlap of two end gutters 9 which are formed along the transverse edges of the interjoists. These gutters 9 have substantially the same section as the bottom of each depression 4 and their longitudinal profile (transverse to the interjoists) is the same as that of the bottom of each depression 4 and at the same altitude as this one.
  • FIG. 6 A detail of Figure 6 illustrates the cooperation of two adjacent interjoists by overlapping their gutter 9 and a locking edge 9a of one of the channels in a retaining tooth 9 b on the other.
  • each of the longitudinal edges 2 and 3 of the interjoists rests substantially in the angle a formed by the heel 16a of the beam 16 with its core 16 b. This leaves out a part of the heel 16 is under the interjoists part that can be leveraged for hanging heavier load suspension elements have under the floor as eg false ceilings elements 17. This This possibility does not exist in known interiors known as concrete or polystyrene because these interjoists totally occupy the angle A of each beam 16.
  • each can be equipped with a gasket or a part flexible which will ensure a certain tightness between the joist and the interjoists in order to avoid flows of concrete laitance.
  • This seal can be a lip is in one piece with the interjoiself itself be reported in the longitudinal edge of it suitably shaped to receive this lip.
  • thermoplastics injected to achieve such interjoists.
  • thermoformed plastic sheets it is possible to imagine the manufacture of these devices from stamped metal sheets or even thermoformed plastic sheets.
  • the interview according to the invention comprises (see FIG. 4) along one of its longitudinal edges a handle 18 for its handling. Since each interview is not very heavy, a worker can take in hands several interjacent ones piled up on the others, as in figure 6, by means of the handles 18 which correspond, thus making it possible to decrease very substantially handling operations on site.
  • the element shown in Figure 10 is a tympanum intended to complete a span of interjoists between two beams.
  • This eardrum essentially has a wall substantially vertical 20 whose outer surface visible has a texture-style grooves such as represented in FIGS. 1 and 2, this vertical wall being extended by a sole 21 which is substantially perpendicular whereas at the opposite of this sole 21 the tympanum is provided in one piece with the wall vertical 20 of a gutter 22.
  • the gutter 22 is intended to receive either the end 9 of a interjoists or one end of it that would have been cut out in the depression. 4.
  • the profile of the wall 20 is substantially identical to the transversal profile of a interjoists at the level of each of the caissons while the dimension parallel to joists of the sole 21 which is at the level of the surface of the beams, may be such as to allow an adjustment of the order of 1 to 10 centimeters with respect to the support 23 on which the beams 16 rest.
  • the sole 21 is textured for example as shown in Figure 3. Gussets 24 extend between the sole 23 and the wall 20 as stiffeners interjoists. Side flanges 25 a is finally noted, 25 b which rest on the heels of the beams and which have the function of sealing between the eardrum and the joists.
  • each eardrum is drawn from a pair of eardrums obtained by injection into an impression double, symmetrical to each other in relation to a line median corresponding to the outer edge of the sole of every eardrum.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Forms Removed On Construction Sites Or Auxiliary Members Thereof (AREA)
  • Superconductors And Manufacturing Methods Therefor (AREA)
  • Crystals, And After-Treatments Of Crystals (AREA)
  • Road Signs Or Road Markings (AREA)
  • Moulds, Cores, Or Mandrels (AREA)

Claims (11)

  1. Verlorenes Schalungselement für eine Betonstruktur, das aus einem entzündbaren thermoplastischen Kunststoff in Form einer dünnen, auf einer Fläche gerippte Wand (P) hergestellt ist, dadurch gekennzeichnet, dass die Dicke der Wand zwischen 1,5 und 2,5 mm beträgt und die gesamte Fläche (F) der Wand, die dazu bestimmt ist, mit dem Beton in Kontakt zu kommen, mit einer Texturierung in Form von Reliefs (R) versehen ist, deren Höhe (h) und Breite (I) in der Größenordnung der mittleren Dicke der Wand (P) liegen, und deren Beabstandung zwischen 8 mm und 10 mm beträgt, um eine Verankerung des Elements im auf der oben genannten gesamten Fläche (F) verteilten Beton sicherzustellen und eine vergrößerte Fläche des Kontakts zwischen dem Element und dem Beton zu bieten, um den Wärmeaustausch zwischen diesen zu unterstützen.
  2. Schalungselement nach Anspruch 1, dadurch gekennzeichnet, dass die mit dem Beton kontaktierende Fläche rau ist.
  3. Schalungselement nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass es aus einem Polypropylen im Spritzgussverfahren hergestellt ist.
  4. Füllkörper unter Anwendung des Elements nach einem der vorhergehenden Ansprüche zur Herstellung von Gebäudedecken in Verbindung mit zwei parallelen Trägern (16), dadurch gekennzeichnet, dass die Wand (1) von zwei in Längsrichtung verlaufenden parallelen Rändern (2, 3) und zwei in Querrichtung verlaufenden Außenrändern (9) begrenzt ist und eine Gesamtform bildet, die um eine Parallele zu den beiden in Längsrichtung verlaufenden Rändern (2, 3) herum gewölbt ist, wobei die texturierte Fläche auf der konvexen Seite liegt und die Wand (1) von der konvexen Seite her gesehen parallele Vertiefungen (4) hat, die in Querrichtung verlaufen und gleichmäßig voneinander beabstandet sind und eine Reihe von kastenförmigen Abschnitten (5) bilden, die zur konkaven Seite hin geöffnet sind.
  5. Füllkörper nach Anspruch 4, dadurch gekennzeichnet, dass der Querschnitt einer Vertiefung (4) der Wand entlang einer zu den in Längsrichtung verlaufenden Rändern parallelen Ebene eine V-Form hat, wodurch an der Innenseite der Druckplatte eine Rippe gebildet wird, die quer zu den Trägern gerichtet ist.
  6. Füllkörper nach einem der Ansprüche 4 und 5, dadurch gekennzeichnet, dass er auf seiner konvexen Fläche geradlinige Markierungen (10) hat, die parallel zu den Vertiefungen (4) verlaufen und Führungslinien für das Zuschneiden in Querrichtung bilden.
  7. Füllkörper nach einem der Ansprüche 4 bis 6, dadurch gekennzeichnet, dass der Abschnitt der Wand (5a), der den Boden jedes Kastens (5) bildet, im wesentlichen eben ist und gleichmäßig voneinander beabstandete Bereiche (11) geringerer Festigkeit hat, so dass diese leicht vom Rest der Wand getrennt werden können.
  8. Füllkörper nach einem der Ansprüche 4 bis 7, dadurch gekennzeichnet, dass er einen Haltegriff (18) umfasst, der entlang einem seiner in Längsrichtung verlaufenden Ränder abtrennbar ist.
  9. Füllkörper nach einem der Ansprüche 4 bis 8, dadurch gekennzeichnet, dass er äußere Rinnen (9) hat, die in ihrer Form und Anordnung dem Boden jeder Vertiefung (4) ähneln und die Mittel zum Einrasten (9a, 9b) mit der Rinne eines angrenzenden Füllkörpers umfassen.
  10. Außengiebel unter Anwendung des verlorenen Schalungselements nach einem der Ansprüche 1 bis 3, der dazu vorgesehen ist, eine Reihe von Füllkörpern nach Anspruch 4 am Ende der Untergurtträger (16) abzuschließen, dadurch gekennzeichnet, dass er eine im wesentlichen vertikale Wand (20) umfasst, deren Außenprofil dem Profil eines Querschnitts eines Füllkörpers ähnelt und die auf einer Seite auf Höhe der Unterseite des Trägers eine horizontale Auflageplatte (21) und auf der anderen Seite eine Rinne (22) zur Aufnahme des Endes des letzten Füllkörpers der Reihe hat.
  11. Deckenelement hergestellt mittels eines Füllkörpers (1) nach einem der Ansprüche 4 bis 9 und paralleler Untergurtträger (16), dadurch gekennzeichnet, dass jeder der in Längsrichtung verlaufenden Ränder (3, 4) der Füllkörper in einem Winkel (A) des Gurtes und des Trägers ruht, wobei so der äußerste Bereich jedes Gurtes (16a) des Trägers freiliegt, um den Gurt für andere Zwecke zugänglich zu belassen.
EP99954070A 1998-11-26 1999-11-05 Verlorene schalung und die verwendung als füllkörper und gewölbe Expired - Lifetime EP1133605B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR9814890A FR2786514B1 (fr) 1998-11-26 1998-11-26 Entrevous a paroi mince
FR9814890 1998-11-26
PCT/FR1999/002710 WO2000031355A1 (fr) 1998-11-26 1999-11-05 Element de coffrage perdu, entrevous et tympan faisant application

Publications (2)

Publication Number Publication Date
EP1133605A1 EP1133605A1 (de) 2001-09-19
EP1133605B1 true EP1133605B1 (de) 2005-07-06

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EP99954070A Expired - Lifetime EP1133605B1 (de) 1998-11-26 1999-11-05 Verlorene schalung und die verwendung als füllkörper und gewölbe

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EP (1) EP1133605B1 (de)
AT (1) ATE299212T1 (de)
AU (1) AU1052400A (de)
DE (1) DE69926073T2 (de)
ES (1) ES2245517T3 (de)
FR (1) FR2786514B1 (de)
WO (1) WO2000031355A1 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1923519A1 (de) * 2006-11-16 2008-05-21 Kp1 Lüftungsvorrichtung für Hohlräume
FR2916212A1 (fr) * 2007-05-15 2008-11-21 Rector Lesage Sa Dispositif d'isolation pour plancher a poutrelles et plancher obtenu

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FR2830883A1 (fr) * 2001-10-11 2003-04-18 Jean Pieere Duclos Rapido
FR2858343B1 (fr) * 2003-07-31 2007-04-20 Fimurex Entrevous emboitable moule
FR2858641B1 (fr) * 2003-08-04 2005-11-11 Rector Procede de fabrication d'elements intercalaires pour plancher a poutrelles, element intercalaire et plancher obtenu
FR2866041B1 (fr) 2004-02-10 2006-04-28 Kp1 Element d'entrevous
ITPD20040087A1 (it) * 2004-04-01 2004-07-01 Assounisol Srl Elemento modulare prefabbricato per la realizzazione degli alleggerimenti in solai a travetti tralicciati o lastre di tipo predalle
ATE541099T1 (de) * 2005-06-23 2012-01-15 Plasticform S R L Füll- und dämmelement und bausystem mit solch einem element
FR2915218B1 (fr) 2007-04-23 2009-06-05 Kp1 Soc Par Actions Simplifiee Element de suspente pour systeme de suspension reglable.
FR2916215B1 (fr) * 2007-05-14 2009-07-10 Kp1 Soc Par Actions Simplifiee Entrevous en matiere plastique injectee
FR2956421B1 (fr) 2010-02-12 2012-08-10 Rector Lesage Entrevous pour plancher a poutrelles
FR2961226A1 (fr) * 2010-06-15 2011-12-16 Applic Composants Guiraud Freres Soc Et Perfectionnement aux hourdis moules
FR2982627A1 (fr) * 2011-11-10 2013-05-17 Jacques Favre Cache poutrelle clipsable
FR3099503B1 (fr) 2019-08-02 2023-01-06 Lesage Dev Procédé de mise en œuvre d’entrevous de coffrage pour plancher à poutrelles et entrevous de coffrage correspondant
FR3144177A1 (fr) * 2022-12-23 2024-06-28 Edilteco France Entrevous à parois minces réversible

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GB1129892A (en) * 1965-11-08 1968-10-09 Atlas Stone Company Ltd Improvements relating to the construction of floors or roofs
US3642559A (en) * 1970-02-20 1972-02-15 William S Stokes Membrane-lined structural panel
FR2144611A2 (de) * 1971-07-08 1973-02-16 Areco
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FR2682411A1 (fr) * 1991-10-15 1993-04-16 Ailhaud Jean Michel Systeme de plancher prefabrique isolant a table de compression incorporee.
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1923519A1 (de) * 2006-11-16 2008-05-21 Kp1 Lüftungsvorrichtung für Hohlräume
FR2916212A1 (fr) * 2007-05-15 2008-11-21 Rector Lesage Sa Dispositif d'isolation pour plancher a poutrelles et plancher obtenu

Also Published As

Publication number Publication date
ATE299212T1 (de) 2005-07-15
AU1052400A (en) 2000-06-13
EP1133605A1 (de) 2001-09-19
DE69926073D1 (de) 2005-08-11
DE69926073T2 (de) 2006-04-20
WO2000031355A1 (fr) 2000-06-02
ES2245517T3 (es) 2006-01-01
FR2786514A1 (fr) 2000-06-02
FR2786514B1 (fr) 2001-01-19

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