EP0730063B1 - Procédé de moulage pour la fabrication d'éléments en porte-à-faux en béton renforcé et système de coffrage pour le procédé - Google Patents

Procédé de moulage pour la fabrication d'éléments en porte-à-faux en béton renforcé et système de coffrage pour le procédé Download PDF

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Publication number
EP0730063B1
EP0730063B1 EP96830087A EP96830087A EP0730063B1 EP 0730063 B1 EP0730063 B1 EP 0730063B1 EP 96830087 A EP96830087 A EP 96830087A EP 96830087 A EP96830087 A EP 96830087A EP 0730063 B1 EP0730063 B1 EP 0730063B1
Authority
EP
European Patent Office
Prior art keywords
bracket
bearing structure
support bracket
support
squaring
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
EP96830087A
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German (de)
English (en)
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EP0730063A1 (fr
Inventor
Leonardo Cappi
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.)
RIVOLI SpA
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RIVOLI SpA
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Publication date
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Publication of EP0730063A1 publication Critical patent/EP0730063A1/fr
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Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • E04G13/00—Falsework, forms, or shutterings for particular parts of buildings, e.g. stairs, steps, cornices, balconies foundations, sills
    • E04G13/06—Falsework, forms, or shutterings for particular parts of buildings, e.g. stairs, steps, cornices, balconies foundations, sills for stairs, steps, cornices, balconies, or other parts corbelled out of the wall
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
    • E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
    • 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
    • E04G13/00—Falsework, forms, or shutterings for particular parts of buildings, e.g. stairs, steps, cornices, balconies foundations, sills
    • E04G13/06—Falsework, forms, or shutterings for particular parts of buildings, e.g. stairs, steps, cornices, balconies foundations, sills for stairs, steps, cornices, balconies, or other parts corbelled out of the wall
    • E04G13/066—Falsework, forms, or shutterings for particular parts of buildings, e.g. stairs, steps, cornices, balconies foundations, sills for stairs, steps, cornices, balconies, or other parts corbelled out of the wall for overhangs
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
    • E01D2101/00—Material constitution of bridges
    • E01D2101/20—Concrete, stone or stone-like material
    • E01D2101/24—Concrete
    • E01D2101/26—Concrete reinforced

Definitions

  • the present invention relates to a box molding process for realizing projecting elements in reinforced concrete, and a molding system thereof, in particular for building elements for bridges, viaducts and roofs.
  • a first building method proposes the use of special reinforced supports equipped with trestles, which are fixed to an underlying bearing structure, such as a beam, a box-shaped element or the like.
  • a further drawback inherent in the above system is the difficult of positioning the reinforcement rods due to their having to pass through the inside of the stirrups of the trestles, a time-consuming task.
  • a still further inconvenient is the occurrence of uneven settling during the concrete casting operation. This unevenness leads to incorrect alignments of the trestle caissons, which are impossible to put right: consequently, a second operation is needed for setting the lateral wings.
  • a second constructional system for realizing projecting elements involves the use of a projecting bridge system supported by a strut and tie-rod assembly.
  • this system requires the presence of a strut element extending vertically from the bearing structure, which strut opposite end is constrained on one side by a tie rod fixed to the underlying structure and on the other side by a free end of a projecting slab.
  • This system also exhibits a series of problems, a first of which is the elevated deformability of the system, rendering the system utilizable only with limited-size projections. Further, the slab must be provided with attachments for anchoring the tie-rod; then, once the concrete has been cast and the slab rendered solid, the tie rods and cut and the attachments, being situated inside the setting concrete, are lost.
  • a third constructional system for realizing projecting elements involves the creation of an external mold, supported by a scaffold.
  • a plurality of elements are used, including: a pair of vertical props positioned between the floor and the ceiling, each one being engaged with a bracket which is positioned externally to the portion of wall to be realized, a frame with a right-angled triangular shape, with one vertical side which supports the panel, an angle inside the lower portion of the wall and a hypotenuse which extends from the base of the prop, up over the panel, towards the exterior of the building, until it reaches a support which holds the panels.
  • the support has the shape of an upside-down L wherein one side of the L, the vertical side, engages with the panel, while the other side has, at the free end, a rope which is fastened to the bracket and is used to adjust the position of the external panel.
  • a gusset which is capable of holding a hook for removing the structure from the outside, once the portion of the wall has been completed.
  • the system illustrated is particularly complicated and has some drawbacks. In fact, this system can be used to realize vertical wallportions with limited dimensions. The layout of the different elements does not allow a horizontal projecting element to be realized.
  • the entire structure is only used to hold the panels which constitute the actual box-molding elements.
  • the system illustrated is no more than a mobile box mold which is constrained between the ceiling and the floor, and the bracket and the support are used to hold the panels which constitute the container for the concrete jet.
  • a still further system proposes the use of a slab supported by a bracket anchored to the side wall of the bearing structure.
  • the main aim of the present invention is to resolve the above-described problems inherent in the prior art by providing projecting elements of considerable size by means of a boxing system and process therefor which permits of varying the size of the projections of the concrete simply, without incurring increased manufacturing costs, and without any time-wasting.
  • the invention is also easy to construct and use.
  • a further aim of the invention is to provide a box mold system and realization process therefor which do not necessitate the use of massy and complex structures disturbing the insertion of the reinforcement rods of the slab, as happened in the prior art systems.
  • a still further aim of the present invention is to obtain projecting elements having various geometrical and static properties, without having recourse to making alterations in the conformation of the box molds used. Further, with the process, correct positioning of the mold slab is ensured since the projections can be aligned and any height errors made during casting can be corrected, unlike in the prior art realizations.
  • a further aim of the present invention is to realize a support structure for the mold box which can be saved after used and reutilized.
  • a still further aim of the present invention is to realize the projections at contained cost with regard to the plant and the tools used, to better use of work time, considerable adaptability of use, and with regard to increased, indeed optimum safety for operations during both mounting and dismounting phases of the elements which constitute the projection mold box.
  • 1 denotes in its entirety a manufacture comprising a projecting element and relative box mold system according to the present invention.
  • 2 denotes a bearing structure which can be a beam or a box-like structure for making bridges and/or roofing elements.
  • the molding system used in the process of the present invention comprises a support 3 made in reinforced concrete and having a parallelepiped conformation.
  • the support 3 is adapted to be located and/or anchored on the bearing structure 2 and the support 3 exhibits a pivot 4.
  • the molding system also comprises a tie-rod 5 adapted to be constrained to the bearing structure 2 at a prefixed distance and a bracket 6 adapted to be positioned restingly on the pivot 4.
  • bracket 6 is provided at one end 6a with an i attachment element 5a predisposed to be constrained to the tie-rod 5 and at the other end 6b with a plurality of holes 7 arranged in two parallel lines and specially distanced one from another.
  • the molding system presents a support bracket 8 engaged to the bracket 6.
  • the support bracket 8 is L-shaped, wherein a first arm of said L-shape is adapted to be constrained to the support bracket 8 by means of a pair of plugs 12 inserted in the holes 7, constraining thereby the support bracket 8 to the bracket 6 at a predetermined distance from the bearing structure 2, corresponding to the dimensions of the projecting elements to be constructed while the other arm of the L-shape constitutes the rest base at a squaring beam 9.
  • a first plug 12a serves to rotatably engage the support bracket 8, while a second plug 12b serves to block rotation thereof.
  • a squaring beam 9 is adapted to rest on the rest base of the support bracket 8, and has the task of supporting a molding slab 10 the extremities of which are adapted to rest respectively on the bearing structure 2 and the squaring beam 9.
  • the process of the present invention comprises a plurality of operative phases for realizing the molding, with the aim of constructing a projecting element of considerable dimensions on the bearing structure 2, and of dismounting the mold itself once the concrete cast and the concrete slab have hardened.
  • the process as can clearly be seen in figure 2, comprise a first phase in which a support 3 in concrete or like material exhibiting a pivot 4 on its summit is rested or anchored on the bearing structure 2.
  • a tie rod 5 is constrained to the bearing structure 2 at a prefixed distance.
  • Figure 3 illustrates a subsequent phase involving the positioning of a bracket 6 restingly on the pivot 4 and constrained to the tie-rod 5 by an attachment element 5a.
  • bracket 6 By acting on the tie-rod 5 through the attachment element 5a the bracket 6 is adjusted, bringing it to the exact height required: this adjustment operation can be repeated during subsequent operative phases.
  • a support bracket 8 is positioned at a predetermined distance from the pivot 4, said predetermined distance depending on the length of the projection to be realized.
  • the support bracket 8 is connected to bracket 6 by means of a first plug 12a which is inserted in a hole 7 and blocked by a second plug 12b which is inserted in another hole 7 arranged vertically with respect to the preceding hole 7.
  • the following phase of the process involves the laying of a squaring beam 9, on the L-shaped element of the support bracket which represents the support base for the said squaring beam, between the bracket 6 and the support bracket 8, as shown in figure 4.
  • the molding slab 10 is positioned, the ends whereof rest respectively on the squaring beam 9 and the bearing structure 2.
  • the mold box for the projecting element is ready and the reinforcements can be arranged for the slab and projection.
  • the height of the future projection can one more be adjusted if necessary.
  • the concrete can be cast into the mold constituted by the squaring beam 9, the molding slab 10 and the bearing structure 2, as shown in figure 6.
  • the support bracket 8 When the concrete has hardened the support bracket 8 is loosened, removing one of the two plugs 12 by means of which it was constrained to the bracket 6. Once the plug 12b has been released, as shown in figure 7, the support bracket 8 is rotated such as to be distanced from the squaring beam 9.
  • Figure 8 shows how the bracket 6 is removed: after having been detached from the tie-rod 5 and the support bracket 8, it is lifted while the tie-rod 5 and the pivot 4 are immersed in the cast.
  • a lateral curb 11 can be made, already squared in the external side by of the squaring beam 9, meaning that it is sufficient to add a formwork containing element in the opposite internal side to complete the squaring of the lateral curb 11.
  • the invention thus achieves its set aims.
  • the process according to the invention obviates all the drawbacks in the prior art and does away with the need for awkward trestles while allowing for great simplicity in the arranging of the reinforcing rods in the mold slab.
  • the process of the invention enables repeated aligning of the projections and therefore correction of small height errors, considerably reducing the possibility of deformations in the completed system.
  • the box-molding system of the invention comprises simple elements which can be utilised for obtaining projections having different dimensions and which can be reutilized many times.
  • the elements which make up the box mold of the present process enable the incorporating of the squaring beam 9 and the recuperation of the support bracket 8, which can be reutilized.
  • the squaring beam 9, the molding slab 10 and the bearing structure 2 alone constitute the box mold which will contain the concrete jet.
  • the process enables the mounting and dismounting operations of the box mold structural elements to be carried out in complete safety.

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Forms Removed On Construction Sites Or Auxiliary Members Thereof (AREA)
  • Bridges Or Land Bridges (AREA)
  • On-Site Construction Work That Accompanies The Preparation And Application Of Concrete (AREA)
  • Rod-Shaped Construction Members (AREA)
  • Lining And Supports For Tunnels (AREA)
  • Crystals, And After-Treatments Of Crystals (AREA)
  • Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)

Claims (7)

  1. Une procédé de moulage en coffrage destiné à la réalisation d'éléments en saillie en béton armé qui débordent une structure portante telle qu'une poutre ou une structure à forme de caisse destinées à la construction de ponts et/ou d'éléments de toiture, comprenant, dans l'ordre, les phases suivantes:
    positionnement d'un support (3) muni d'un pivot (4) sur la structure portante (2) et introduction d'une tige-crampon (5) sur ladite structure portante (2) ;
    positionnement d'une console (6) en la posant sur ledit pivot (4) et fixation de ladite console (6) à ladite tige-crampon (5), ladite console étant munie d'un élément de fixation, ledit élément de fixation étant placé à une extrémité de la console et fixant la tige-crampon ancrée à la structure portante, de façon à fixer la console à la structure portante, ladite console étant munie à l'autre extrémité d'une pluralité de trous disposés sur deux lignes parallèles et à une distance donnée l'une de l'autre ;
    ajustage de la position de ladite console (6) par le réglage de la hauteur exacte de la console (6) en agissant sur ladite tige-crampon (5) ;
    positionnement d'une console de support (8) substantiellement en forme de L, un bras du L étant fixé à la console et débordant vers le bas, l'autre bras du L débordant vers la structure portante et formant une base d'appui et fixation de celle-ci à ladite console (6) grâce à l'introduction dans cette dernière de deux tampons (12) fixant la console de support à la console à une distance prédéterminée correspondant aux dimensions de l'élément débordant qui doit être construit ;
    positionnement d'une poutre d'équarrissage (9) qui est placée sur ladite base d'appui entre la console (6) et la console de support (8) ;
    positionnement d'une dalle de moulage (10) entre la poutre d'équarrissage (9) et la structure portante (2) ;
    coulée de béton liquide dans le moule formé par la poutre d'équarrissage, la dalle de moulage et la structure portante ;
    dégagement de ladite console de support (8) quand le béton a durci en retirant le premier tampon (12a) du trou (7) qui se trouve dans ladite console (6) ;
    rotation vers l'extérieur de ladite console (6) et de ladite console de support (8) alors que la poutre d'équarrissage (9) et la dalle de moulage (10) restent incorporées dans l'élément débordant en béton armé qui a été achevé.
  2. Un procédé comme celui de la revendication 1, caractérisé par le fait que le deuxième tampon (12b) est introduit dans un trou (7) placé verticalement et en alignement avec ledit premier tampon (12a).
  3. Un procédé comme celui de la revendication 1, caractérisé par le fait qu'il comprend une phase durant laquelle les armatures, destinées à la future dalle et à l'élément débordant qui doivent être réalisés, sont mises dans une position correcte.
  4. Un procédé comme celui de la revendication 1, caractérisé par le fait qu'il comprend une phase de séchage et de prise du béton liquide.
  5. Un procédé comme celui de la revendication I, caractérisé par le fait que, après la phase durant laquelle la dalle de moulage est posée, il y a une phase de contrôle et d'ajustage de la longueur et de la hauteur de la partie débordante avant que le béton ne soit coulé.
  6. Un procédé comme celui de la revendication 1, caractérisé par le fait qu'il comprend une phase relative à la réalisation d'un bord latéral (11), ladite phase comprenant la construction d'une armature qui, sur le côté extérieur, est obtenue grâce à l'utilisation de la poutre d'équarrissage (9) alors que sur le côté opposé, l'armature est obtenue par l'adjonction d'un élément d'armature, ladite phase de réalisation du bord latéral étant suivie de la phase de coulée du ciment.
  7. Un système pour réaliser des éléments faisant saillie en béton armé qui débordent la structure portante comprenant :
    un support (3) destiné à être placé sur la structure portante (2), ledit support (3) présentant un pivot (4),
    une tige-crampon (5) destinée à être fixée à la structure portante (2) à une distance prédéterminée,
    une console (6) destinée à être posée sur ledit pivot, ladite console étant munie à une extrémité d'un élément d'ancrage (5a) prévu pour être fixé à la tige-crampon (5), à l'autre extrémité d'une pluralité de trous (7) disposés sur deux lignes parallèles et à une distance donnée,
    une console de support (8) fixée à la console (6), ladite console de support étant à forme de L, caractérisée par le fait qu'un premier bras du L est destiné à être fixé à la console de support (8) au moyen de deux tampons (12) introduits dans lesdits trous (7), fixant de cette façon la console de support (8) à la console (6) à une distance prédéterminée de la structure portante (2), correspondant aux dimensions des éléments faisant saillie qui doivent être construits, un premier tampon (12a) servant à fixer la console de support de façon à ce qu'elle puisse tourner et le deuxième tampon (12b) servant à bloquer la rotation de celle-ci, alors que le deuxième bras du L constitue une base d'appui,
    une poutre d'équarrissage (9) destinée à être posée sur la base d'appui ;
    une dalle de moulage (10), dont les extrémités sont destinées à être posées respectivement sur la poutre d'équarrissage (9) et sur la structure portante (2).
EP96830087A 1995-03-01 1996-02-29 Procédé de moulage pour la fabrication d'éléments en porte-à-faux en béton renforcé et système de coffrage pour le procédé Expired - Lifetime EP0730063B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITMN950006 1995-03-01
IT95MN000006A IT1282248B1 (it) 1995-03-01 1995-03-01 Procedimento di casseratura per la realizzazione di elememti a sbalzo in manufatti in casa e relativo sistema di casseratura

Publications (2)

Publication Number Publication Date
EP0730063A1 EP0730063A1 (fr) 1996-09-04
EP0730063B1 true EP0730063B1 (fr) 2003-08-27

Family

ID=11384511

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96830087A Expired - Lifetime EP0730063B1 (fr) 1995-03-01 1996-02-29 Procédé de moulage pour la fabrication d'éléments en porte-à-faux en béton renforcé et système de coffrage pour le procédé

Country Status (5)

Country Link
EP (1) EP0730063B1 (fr)
AT (1) ATE248255T1 (fr)
BR (1) BR9600640A (fr)
DE (1) DE69629609D1 (fr)
IT (1) IT1282248B1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102392536B (zh) * 2011-10-28 2013-05-01 山东万鑫建设有限公司 大跨度悬空通廊式模板支撑体系施工方法
CN105970823B (zh) * 2016-06-13 2017-11-24 中交第二航务工程局有限公司 一种用于大跨度、超高扭曲体的箱梁内模系统
CN110685227B (zh) * 2019-11-02 2021-11-02 中铁七局集团有限公司 跨障碍宽幅转体桥梁合拢段吊架法模板支撑体系施工方法

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1335057A (fr) * 1962-07-02 1963-08-16 Stup Procedes Freyssinet Perfectionnements aux procédés et dispositifs de construction de ponts en encorbellement
US3974995A (en) * 1974-08-26 1976-08-17 Guy Blonde Means for forming a building facade
BE849341A (fr) * 1976-12-13 1977-04-01 Procede permettant le betonnage de l'encorbellement d'un ouvrage d'art et element de support utilise a cet effet
US5083739A (en) * 1989-10-05 1992-01-28 Symons Corporation Concrete form support bracket for bridge overhang decks
EP0577004A1 (fr) * 1992-06-29 1994-01-05 Betomax AG Dispositif d'ancrage

Also Published As

Publication number Publication date
BR9600640A (pt) 1997-12-30
ITMN950006A1 (it) 1996-09-01
ATE248255T1 (de) 2003-09-15
IT1282248B1 (it) 1998-03-16
EP0730063A1 (fr) 1996-09-04
DE69629609D1 (de) 2003-10-02

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