EP1496172A1 - Schalungselement zur Erzeugung von einer Ausparung kleinen Ma es in einem Betonbauwerk und Schalungselement mit mehreren solcher Elemente, die eine Kombination mit einer Bewehrung ermöglichen - Google Patents

Schalungselement zur Erzeugung von einer Ausparung kleinen Ma es in einem Betonbauwerk und Schalungselement mit mehreren solcher Elemente, die eine Kombination mit einer Bewehrung ermöglichen Download PDF

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Publication number
EP1496172A1
EP1496172A1 EP04370022A EP04370022A EP1496172A1 EP 1496172 A1 EP1496172 A1 EP 1496172A1 EP 04370022 A EP04370022 A EP 04370022A EP 04370022 A EP04370022 A EP 04370022A EP 1496172 A1 EP1496172 A1 EP 1496172A1
Authority
EP
European Patent Office
Prior art keywords
reservation
box
formwork
face
element according
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.)
Withdrawn
Application number
EP04370022A
Other languages
English (en)
French (fr)
Inventor
Régis Pettier
Stéphane Champroux
Frédéric Watel
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Rabot Dutilleul Construction
Original Assignee
Rabot Dutilleul Construction
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Rabot Dutilleul Construction filed Critical Rabot Dutilleul Construction
Publication of EP1496172A1 publication Critical patent/EP1496172A1/de
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B7/00—Moulds; Cores; Mandrels
    • B28B7/0002—Auxiliary parts or elements of the mould
    • B28B7/0014—Fastening means for mould parts, e.g. for attaching mould walls on mould tables; Mould clamps
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B7/00—Moulds; Cores; Mandrels
    • B28B7/0002—Auxiliary parts or elements of the mould
    • B28B7/0014—Fastening means for mould parts, e.g. for attaching mould walls on mould tables; Mould clamps
    • B28B7/002—Fastening means for mould parts, e.g. for attaching mould walls on mould tables; Mould clamps using magnets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B7/00—Moulds; Cores; Mandrels
    • B28B7/28—Cores; Mandrels
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G15/00—Forms or shutterings for making openings, cavities, slits, or channels
    • E04G15/06—Forms or shutterings for making openings, cavities, slits, or channels for cavities or channels in walls of floors, e.g. for making chimneys
    • E04G15/063—Re-usable forms
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B7/00—Moulds; Cores; Mandrels
    • B28B7/34—Moulds, cores, or mandrels of special material, e.g. destructible materials
    • B28B7/342—Moulds, cores, or mandrels of special material, e.g. destructible materials which are at least partially destroyed, e.g. broken, molten, before demoulding; Moulding surfaces or spaces shaped by, or in, the ground, or sand or soil, whether bound or not; Cores consisting at least mainly of sand or soil, whether bound or not
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B7/00—Moulds; Cores; Mandrels
    • B28B7/34—Moulds, cores, or mandrels of special material, e.g. destructible materials
    • B28B7/348—Moulds, cores, or mandrels of special material, e.g. destructible materials of plastic material or rubber

Definitions

  • the present invention relates to the field of building and more particularly the realization of concrete work in which it is necessary to form reservations for the passage of equipment or accessories. It relates more particularly to a formwork element intended to form a small reservation throughout the entire width of a structure including concrete veil, as well as a set of formwork comprising a plurality of such formwork elements allowing a combination with a frame, especially a welded mesh.
  • reservation elements which are most often made directly on site from wood or polystyrene. It's about reservation elements that have the major disadvantage of not being not reusable, which monopolize labor on the site and which give relatively coarse bookings that may require smoothing or repeating. Moreover, when they are made of wood, the formwork is difficult because of the swelling of the wood during concreting.
  • the document FR2.635.803 relates to a set modular formwork to make a reservation in a concrete veil, which set comprises a main element and auxiliary elements, which are equipped with assembly means intended to cooperate to form the reservation.
  • the main element like each of the auxiliary elements, have a bearing face having housing receiving elements Magnetic fastening of the element on its bearing surface against the cheek metal formwork.
  • main element and auxiliary elements as well as various assembly accessories such as fastening elements are preferably made of a material synthetic or having a certain elasticity, neoprene or other, to facilitate the installation and the stripping, without damaging the shape of the room to allow its reuse without that in the reservation as well realized, it is necessary to carry out work of reassembly.
  • main element and the auxiliary elements can be made full or possibly hollow being, in this case, delimited only by the walls.
  • the hollow element can possibly be filled with a material such as a foam synthetic to strengthen it.
  • the reservation element described by the document FR.2.635.803 does not allow not to obtain that said element can be reused a very large number of times important, including a number of times equal to or greater than forty.
  • a formwork element to form a small-sized reservation across the entire width of a structure concrete - hereinafter referred to as a reservation element - including a plastic box having a bearing surface equipped with means magnetized for its fixation on a metal formwork shutter, hereinafter referred to as a reservation box.
  • the element of reservation includes a striking piece, opposite to the bearing face of the reservation box whose mechanical resistance to impact under the action of a hammer and / or the removable character, allows the element of reserve to withstand at least forty stripping operations.
  • the reservation box has a front face, said face of support, and a rear face which are both close, or even contact of the two shuttering of the formwork between which is carried out the pouring concrete.
  • the striking piece is therefore at the level of the rear face of the reservation box. This is the configuration of this box between his front and back faces that globally determines the shape of the reservation.
  • the plaintiff has indeed found that it is the degradation of the back part of the reservation element which limits the ability of reuse of said element.
  • the back part is the part of the element of reservation which is opposite to the front or support face, including the magnetic means, the reservation box.
  • This degradation of the game back is caused by the impacts of the user's hammer blows, which blows are necessary to allow the ejection of the element of reservation outside the partially consolidated concrete structure, when Formwork removal usually takes place twelve hours after pouring.
  • the punching piece is constituted by the rear face of the reservation box which is opposed to the bearing face, and which is referred to in this case face typing. This face The impactor then has an impact resistance of at least 500 joules.
  • the reservation element is a box of material hollow plastic, of low density, whose striking face has a thickness superior to other faces.
  • this box is obtained by rotational molding.
  • the reservation element is a box of material hollow plastic which comprises at least one internal buttress, forming spacer between the support face and the rear face, for example of a box obtained by roto-molding, each internal buttress - obtained during roto-molding - in the form of two cone frustums opposed by their highs.
  • the two truncated cones are open to the outside and closed at their apex, the height of the trunk of rear cone opening on the rear face being lower than that of the trunk of cone before opening on the face of support.
  • the striking piece is an interchangeable piece, which is attached to the back of the box plastic booking.
  • This interchangeable piece may be a piece of wood, or a piece of high density plastic material.
  • This interchangeable piece can be reported by screwing on the back side of the reservation box with threaded inserts.
  • the reservation element is intended to form a reservation on the entire thickness of the concrete veil.
  • the magnetic means equipping the support face of the reservation box make it possible to ensure positioning of said box on the front side of the formwork.
  • the magnetization force is usually not sufficient to ensure a holding the reservation element in place when pouring the concrete between the two banches.
  • he is known, and particularly in the document FR.2.635.803, to provide an element of fixation, integrated in the reservation box, which has a slightly longer length greater than the thickness of the web, so that said element of fastening is compressed when clamping the formwork so as to obtain the blocking the reservation element not only by hanging magnetic on the front formwork but also by the compression of the fastening element, between the front wall and the wall back.
  • the compression blocking of the reservation element is achieved by the implementation of a compressible material, which is arranged between the reservation box and the striking plate.
  • the support face of the box of reservation includes housings for magnetic means
  • said compressible material is disposed between the magnetic means and the bottom said dwellings.
  • the compression lock of the reservation element is obtained thanks to the deformation capacity elastic or side walls of the reservation box under the effect pressure.
  • the side wall or some side walls of the reservation box has an inclination oblique, convergent, from the bearing face to the rear face, said inclination having a convex curvature.
  • FR.2.635.803 provides that certain sides of the main element or auxiliary elements can be angled, with a convergent inclination from the front to the back, so as to facilitate the stripping.
  • certain faces may have a curvature.
  • the convex curvature of the wall or walls the purpose of ensuring that the elastic deformation of said wall, caused during the clamping of the formwork, also convex and not concave.
  • the constituent plastic material of the reservation box tends to return to its original position, which ensures a certain detachment or any at least a decrease in the adhesion between the concrete and the box of reservation, which correspondingly decreases the impact necessary for stripping and consequently increases the re-usability of the booking element.
  • the formwork assembly comprises a plurality of elements reservation of which the side wall or walls of the reservation box has a convergent oblique inclination, from the bearing face to the back side.
  • the support faces of the various elements of reservation are adjacent to each other. In this way, are delimited in the gaps between the adjacent side walls of the free spaces for placing the reinforcement inside the formwork, at least in the zone delimited by the reservation elements.
  • juxtaposition of small reservation items dimension allows to obtain a dimension reservation mean while allowing to integrate a frame, including but not exclusively a welded mesh, in the formwork, in the zone of booking.
  • the reservation element that will be described below and which is illustrated in the accompanying figures has a rectangular cross section. However this is not exclusive of the present invention, this section could be square, polygonal, circular or even oval.
  • the element of reservation 1 comprises a bearing surface 2, equipped with magnetic pellets 3, intended for at least temporary attachment of the reservation element 1 on a metal panel 4 of the formwork.
  • This bearing surface 2 constitutes the front face of a plastic box 5 which, in the illustrated example, has the shape of a section parallelepiped rectangular.
  • the side walls 5a of this box 5 are inclined the front to the back, as is clear from the figures.
  • the reservation element 1 is distinguished more particularly by a striking piece, which is opposite to the bearing face 2 and which, in the example shown, is a part 6 attached to the rear face 7 of the box plastic 5 which is opposed to the support face 2.
  • each threaded insert 8 is obtained during actual molding of the box 5.
  • the striking piece 6, reported, can be replaced in case alteration under the impact of the hammer, by a simple screwing / unscrewing. It is therefore sufficient to have on site a certain quantity replacement coin pieces.
  • This striking piece 6 can be made of wood, plastic high density, possibly in natural or synthetic rubber.
  • the punching piece is formed by the rear face 21 of the reservation box 20, said face of hit.
  • the mechanical resistance to the impact of this piece of striking is determined so that it resists hammer impacts for at least 40 stripping operations under normal conditions, this resistance being at least 500 joules.
  • the box of plastic, hollow is obtained by roto-molding of high density polyethylene, the thickness E of the striking face 21 being of the order of 1Omm while the thickness e of the side walls is of the order of 5-6 mm.
  • Figure 5 illustrates the positioning of a reservation element 1 in a formwork.
  • the metal formwork before 4 of the formwork being put in place on the site the operator comes to apply the support surface 2 of the element of reservation 1 on said metal panel 4 at the location provided for the booking.
  • the metal back panel is then put in place, at a distance of the front panel which corresponds to the thickness of the concrete veil that we wish to obtain.
  • the concrete 10 is then poured between the two sides 4, 9 and thus around the reservation element 1.
  • This formwork is obtained by striking, using of a hammer, on the striking piece 6, with sufficient force to remove the reservation element 1 from the concrete block 10 surrounding it. It is to facilitate this ejection that the side walls 5a of the box 5 are obliquely inclined convergently towards the rear face 7.
  • reservation element 1 When pouring concrete, reservation element 1 could possibly move if the locking in position of said element between two banches 4, 9 was not enough. To perfect this blockage, it is known to perform some compression of a fastener between the two panels 4, 9, when tightening the formwork. In the case of present invention, this compression is obtained either through the implementation of of a compressible material, in the reservation element itself, either thanks to the deformation of the reservation box.
  • compressible material 11 - for example natural rubber or synthetic material - is disposed between the striking piece 6 and the rear face 7 of the reservation box 5, being maintained between the two elements, in particular thanks to screws 12.
  • compressible material 13 is disposed in the bottom 14a of a housing 14 in which is placed the magnetic chip 15, said housing 14 being formed in the support surface 2 of the reservation box 5.
  • the magnetized chip 15 has a displacement capacity inside the housing 14 thanks to the compressibility of the material 13. In the normal position, the material 13 is not compressed, the chip 15 protrudes outside the housing 14. When the reservation element is put in place and when the clamping between the two panels 4, 9 intervenes, the magnetized chip 15 moves towards the interior of the housing 14 under the effect of the compression of the material 13.
  • the magnetized chip 15 and the compressible material 13 both comprise a through-hole 16, 16 'for the passage of a screw 17, cooperating with a threaded recess 18 provided in the face of FIG. support 2.
  • the through hole 16 of the pellet 15 is shaped so that the head 17a of the screw 17 penetrates inside the pellet 15 over a distance d which corresponds to the maximum displacement capacity of the pellet due to the comp material 13 during the clamping of the formwork.
  • FIG. 4 shows the positioning of the magnetized chip 15 protruding out of the housing 14 over the distance d .
  • the pressure exerted (arrow F) by the front panel on the magnetized pellet pushes it towards the inside of the housing 14, which is made possible by the compressibility of the material 13 and the possibility of sliding of the material 13 and the pellet 15 along the screw 17.
  • This embodiment is of course not exclusive to the present invention.
  • the compression of the reservation element, during the tightening of the formwork, can also be obtained thanks to the deformation of the wall or walls side of the reservation box.
  • the said walls have a slight convex curvature, curvature which will be accentuated during compression.
  • each buttress 22 has the shape of two hollow cone trunks 22a, 22b opposed by two vertices 22 C which are closed.
  • the height Ha of the first truncated cone 22a opening on the face rear 21 is less than the height Hb of the second truncated cone 22b opening onto the bearing face 23.
  • the total height H of the box of reservation 20 was of the order of 18 cm, and heights Ha, Hb respectively the first 22a and second 22b truncated cones were 3.5 and 14.5 cm.
  • the diameters Da, Db respectively of the openings 24a, 24b emerging from the first 22a and second 22b truncated cones were 3 and 6.5 cm.
  • the reservation element of the present invention is relatively lightweight and very easy to handle. For example for an average size 15 x 20 x 16 cm, with a polyethylene reservation box rotomoulded, either with a striking face or with a striking reservation made of the order of 2 kg, 15 x 20 cm being the dimensions of the bearing surface 2 and 16 cm being the height of the element between the bearing face 2 and the face or the coin.
  • Figures 6 and 7 is illustrated an example of a reservation of medium dimension, implementing nine booking elements 1 as described above, with a coin punch. But he can also act reservation elements without a striking piece, provided that the wall side walls or some side walls of said element have a oblique inclination between the bearing face and the rear face, allowing arrange between the adjacent walls of two adjoining elements a space free. These nine elements are placed against the front panel 4 so contiguous, according to three columns and three rows, the bearing faces 2 being adjoining each other.
  • the concrete is spreading around the nine elements of reservation, and also in the spaces 19 created by the inclination of the walls lateral 5a. During stripping, concrete remains may remain attached to the lattice 18 in said spaces 19. However their recess is easily achieved by the operator with a simple stroke of hammer.
  • the reinforcement consists of a welded mesh is placed in the formwork, in a vertical plane.
  • the armature can take any shape and also be placed according to a horizontal plane or in any other way in the open spaces between the different booking elements.
  • This frame available in the reservation area, delimited by all booking elements, possibly after removal of the concrete remains as indicated above, can be used especially for anchoring other parts of work.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Forms Removed On Construction Sites Or Auxiliary Members Thereof (AREA)
EP04370022A 2003-07-03 2004-07-05 Schalungselement zur Erzeugung von einer Ausparung kleinen Ma es in einem Betonbauwerk und Schalungselement mit mehreren solcher Elemente, die eine Kombination mit einer Bewehrung ermöglichen Withdrawn EP1496172A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0308101 2003-07-03
FR0308101A FR2857044B1 (fr) 2003-07-03 2003-07-03 Element de coffrage pour former une reservation de petite dimension dans un ouvrage de beton et ensemble de coffrage comprenant une pluralite de tels elements permettant une combinaison avec une armature

Publications (1)

Publication Number Publication Date
EP1496172A1 true EP1496172A1 (de) 2005-01-12

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EP04370022A Withdrawn EP1496172A1 (de) 2003-07-03 2004-07-05 Schalungselement zur Erzeugung von einer Ausparung kleinen Ma es in einem Betonbauwerk und Schalungselement mit mehreren solcher Elemente, die eine Kombination mit einer Bewehrung ermöglichen

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EP (1) EP1496172A1 (de)
FR (1) FR2857044B1 (de)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2903440A1 (fr) * 2006-07-04 2008-01-11 Richard Habermann Corps modulaire pour menager une reserve dans une paroi formee par moulage d'un materiau, beton ou materiau analogue notamment.
FR2971806A1 (fr) * 2011-02-18 2012-08-24 Cofrelec Ind Coffrage recuperable pour la realisation d'une reservation dans un mur
CN104727552A (zh) * 2015-04-01 2015-06-24 香港华艺设计顾问(深圳)有限公司 一种在预制剪力墙上预留给水管槽的施工方法
EP3587704A1 (de) * 2018-06-27 2020-01-01 Missiot Invest Schalung zur ausführung von öffnungen, und ihr montageverfahren
CN111157321A (zh) * 2020-01-03 2020-05-15 安徽省海仁材料科技有限公司 一种再生混凝土测试取样装置
CN114147849A (zh) * 2021-11-02 2022-03-08 湖南华好智能装备有限责任公司 一种基于2d平面视觉识别边模的方法及拆模设备

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB574458A (en) * 1944-05-05 1946-01-07 Albert Henry Hawes Improvements in the construction of concrete ceilings, floors, roofs and walls
US3689021A (en) * 1971-03-19 1972-09-05 Arvin F Liester Apparatus for concrete wall construction
EP0086376A1 (de) * 1982-01-28 1983-08-24 Friedrich Manz Schalung für die Herstellung von Ausnehmungen und Durchbrüchen bei Betonbauteilen
FR2570418A1 (fr) * 1984-09-19 1986-03-21 Laroche Jean Pierre Dispositif d'ecartement de coffrages metalliques et de creation de reservations dans des murs en beton en cours de construction
CH666934A5 (en) * 1984-11-29 1988-08-31 Herbert Boelsterli Shuttering core to leave opening in concrete masonry - has hollow, conical, or tapering, prismatic body contg. grip bar and upper and lower pairs of opposed, internal push members
FR2722818A1 (fr) * 1994-07-21 1996-01-26 Joel Thibaud Dispositif de reservation de cables, gaines ou similaires
US6371436B1 (en) * 1997-05-16 2002-04-16 James A. Westhoff Placement ring assembly having magnetic securing means

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2635803B1 (fr) 1988-08-29 1990-11-23 Laroche Sa Ets Ensemble de coffrage pour realiser une reservation de petites et moyennes dimensions dans un voile de beton

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB574458A (en) * 1944-05-05 1946-01-07 Albert Henry Hawes Improvements in the construction of concrete ceilings, floors, roofs and walls
US3689021A (en) * 1971-03-19 1972-09-05 Arvin F Liester Apparatus for concrete wall construction
EP0086376A1 (de) * 1982-01-28 1983-08-24 Friedrich Manz Schalung für die Herstellung von Ausnehmungen und Durchbrüchen bei Betonbauteilen
FR2570418A1 (fr) * 1984-09-19 1986-03-21 Laroche Jean Pierre Dispositif d'ecartement de coffrages metalliques et de creation de reservations dans des murs en beton en cours de construction
CH666934A5 (en) * 1984-11-29 1988-08-31 Herbert Boelsterli Shuttering core to leave opening in concrete masonry - has hollow, conical, or tapering, prismatic body contg. grip bar and upper and lower pairs of opposed, internal push members
FR2722818A1 (fr) * 1994-07-21 1996-01-26 Joel Thibaud Dispositif de reservation de cables, gaines ou similaires
US6371436B1 (en) * 1997-05-16 2002-04-16 James A. Westhoff Placement ring assembly having magnetic securing means

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2903440A1 (fr) * 2006-07-04 2008-01-11 Richard Habermann Corps modulaire pour menager une reserve dans une paroi formee par moulage d'un materiau, beton ou materiau analogue notamment.
FR2971806A1 (fr) * 2011-02-18 2012-08-24 Cofrelec Ind Coffrage recuperable pour la realisation d'une reservation dans un mur
CN104727552A (zh) * 2015-04-01 2015-06-24 香港华艺设计顾问(深圳)有限公司 一种在预制剪力墙上预留给水管槽的施工方法
EP3587704A1 (de) * 2018-06-27 2020-01-01 Missiot Invest Schalung zur ausführung von öffnungen, und ihr montageverfahren
CN111157321A (zh) * 2020-01-03 2020-05-15 安徽省海仁材料科技有限公司 一种再生混凝土测试取样装置
CN114147849A (zh) * 2021-11-02 2022-03-08 湖南华好智能装备有限责任公司 一种基于2d平面视觉识别边模的方法及拆模设备

Also Published As

Publication number Publication date
FR2857044A1 (fr) 2005-01-07
FR2857044B1 (fr) 2005-11-04

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