EP1431015B1 - Procédé de fabrication de poutres en béton renforcé et installation mettant en oeuvre ledit procédé - Google Patents

Procédé de fabrication de poutres en béton renforcé et installation mettant en oeuvre ledit procédé Download PDF

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Publication number
EP1431015B1
EP1431015B1 EP03360144A EP03360144A EP1431015B1 EP 1431015 B1 EP1431015 B1 EP 1431015B1 EP 03360144 A EP03360144 A EP 03360144A EP 03360144 A EP03360144 A EP 03360144A EP 1431015 B1 EP1431015 B1 EP 1431015B1
Authority
EP
European Patent Office
Prior art keywords
moulding
zone
beams
assembly
designed
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
EP03360144A
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German (de)
English (en)
French (fr)
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EP1431015A1 (fr
Inventor
René LEDUC
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.)
Rector Lesage SAS
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Rector Lesage SAS
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Filing date
Publication date
Application filed by Rector Lesage SAS filed Critical Rector Lesage SAS
Publication of EP1431015A1 publication Critical patent/EP1431015A1/fr
Application granted granted Critical
Publication of EP1431015B1 publication Critical patent/EP1431015B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • B28B15/00—General arrangement or layout of plant ; Industrial outlines or plant installations
    • 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
    • B28B23/00—Arrangements specially adapted for the production of shaped articles with elements wholly or partly embedded in the moulding material; Production of reinforced objects
    • B28B23/02—Arrangements specially adapted for the production of shaped articles with elements wholly or partly embedded in the moulding material; Production of reinforced objects wherein the elements are reinforcing members
    • B28B23/04—Arrangements specially adapted for the production of shaped articles with elements wholly or partly embedded in the moulding material; Production of reinforced objects wherein the elements are reinforcing members the elements being stressed
    • B28B23/043—Wire anchoring or tensioning means for the reinforcements
    • 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
    • B28B23/00—Arrangements specially adapted for the production of shaped articles with elements wholly or partly embedded in the moulding material; Production of reinforced objects
    • B28B23/02—Arrangements specially adapted for the production of shaped articles with elements wholly or partly embedded in the moulding material; Production of reinforced objects wherein the elements are reinforcing members
    • B28B23/04—Arrangements specially adapted for the production of shaped articles with elements wholly or partly embedded in the moulding material; Production of reinforced objects wherein the elements are reinforcing members the elements being stressed
    • B28B23/06—Arrangements specially adapted for the production of shaped articles with elements wholly or partly embedded in the moulding material; Production of reinforced objects wherein the elements are reinforcing members the elements being stressed for the production of elongated articles

Definitions

  • the present invention relates to a method of manufacturing concrete beams obtained by molding in a molding bench.
  • the invention also relates to an installation implementing this method and comprising at least one molding zone provided with a molding bench.
  • Concrete beams are generally reinforced concrete beams, in which case the concrete is reinforced with metal reinforcements, or prestressed concrete beams, in which case concrete is in addition, put under stress by prestressing tendons stretched during the molding phase and then relaxed after curing the concrete.
  • the molds used for the manufacture of this type of beams extend over a great length, for example from 60 to 120 meters, and are each cut into a number T of longitudinal sections, by means of spacers or spacers. formwork combs, for manufacturing a number T of beams forming a set.
  • These molds are joined in a molding bench, which has a number M of parallel molds between them, which may have different sections.
  • each molding bench allows the simultaneous realization of a number M of sets of beams, which can have different lengths and sections.
  • each mold is prepared individually and manually by one or more operators who set up the reinforcing cages and the spacers or formwork combs at locations defined according to the length of the reinforced concrete beams to be manufactured, as described for example in the publication EP-A-0 606 794 .
  • they add prestressing cables that run the full length of the molds and are pulled by a tensioning device, as described for example in the publication WO-A-97/18070 .
  • prestressed concrete beams After pouring and hardening of the concrete, the prestressing cables are released and then cut inside the molds, either with a blowtorch or by a circular saw, with all the risks and difficulties that this represents: difficult access, alteration of the mold walls, heavy soiling, danger for the operator, etc.
  • the finished beams are then demolded one by one which, added to the previous tasks, immobilizes the molding bench over a very long period of time.
  • the current manufacturing process does not allow to consider optimal management of the production tool, nor better working conditions for operators.
  • the present invention aims to overcome these disadvantages by proposing a new semi-automated or automated manufacturing process, which eliminates the difficult tasks related to the handling of heavy elements and difficult working positions, ensures accurate manufacturing of reinforcements, deportes in out of the molding molding bench the pre-molding and post-molding processing operations, thereby reducing the downtime of the molding bench, allows a high production flexibility and optimizes the overall efficiency of the manufacturing plant .
  • the invention also relates to a manufacturing facility of the type indicated in the preamble, characterized in that it comprises at least one preparation zone of at least one set of pre-assembled elements positioned relative to the other depending on each beam to be manufactured and comprising at least reinforcing cages, this preparation zone being disposed outside said molding zone, and gripping means arranged to take a single piece of said set of elements pre-assembled of said preparation zone and depositing it in the molding bench of said molding zone, before pouring the concrete.
  • the installation 10 makes it possible to manufacture reinforced concrete or prestressed concrete beams, of different sections and lengths.
  • the beams are reinforced by metal reinforcements only, while in the second case, these beams are further stressed by metal prestressing cables.
  • the Figure 1A illustrates an example of prestressed concrete beam 1, reinforced by reinforcement cages 2 and stressed by prestressing cables 3.
  • the beam 1 as illustrated has a substantially rectangular section, given by way of non-limiting example. , this section can be square, frustoconical, T or any other section suitable for molding.
  • This installation 10 makes it possible to implement a new manufacturing process in which the beams 1 are manufactured by molding in a molding bench 40 comprising several molds 41 and whose length makes it possible to manufacture in each mold 41 several beams 1, called by following a set of beams 1.
  • the prestressing cables are removed and, consequently, the stressing operation of these cables before molding and then cutting these cables after demolding.
  • the installation 10 comprises several work zones and in particular a preparation zone A of sets of pre-assembled elements 5, a molding zone B of the beams 1, an evacuation zone C of the beams 1 manufactured (cf. Fig. 2 and 3 ).
  • This installation 10, and more particularly the preparation zone A is automated and controlled by one or more controllers receiving computer data from a design office relating to the various beams 1 to be produced (length, section, number and location of the cages reinforcement 2, number of prestressing cables 3, location of form spacers 4 and anchors 6, etc.).
  • the molding zone B comprises a molding bench 40 of reduced length compared to conventional molding benches, for example 30 to 70 meters instead of 100 to 150 meters.
  • This molding bench 40 comprises several parallel molds 41 of different sections, mounted on foundations 40 '(cf. Fig. 2 and 3 ). This particular arrangement gives this molding bench 40 a very great flexibility in the production management to simultaneously produce beams 1 of sections and of different lengths.
  • the number of molds 41 may be different, as well as their section and length.
  • These molds 41 can also be adjustable in width and / or depth by means of movable walls.
  • the preparation zone A makes it possible to prepare, apart from the molding bench 40, in parallel thereto and at human height, sets of pre-assembled elements 5 extending over the entire length of this bench.
  • Each set of pre-assembled elements 5 corresponds to one of the molds 41 and comprises an arrangement of reinforcing cages 2, formwork spacers 4, anchoring pieces 6 and prestressing cables 3 determined in FIG. function of the beams 1 to manufacture.
  • This preparation zone A comprises, in the example shown, a frame machine 20 which is a standard machine for automatically manufacturing frames 2a used in the composition of the reinforcement cages 2. These frames 2a are made by folding a wire, for example in the form of a rectangle.
  • This frame machine 20 is fed by a reel 21 carrying four coils 22 of wire of different diameters, for example 6, 8, 10 and 12 mm.
  • the frame machine 20 will automatically use one or the other diameter of wire to make frames 2a of different dimensions and strength depending on the beams 1 to be manufactured.
  • the preparation zone A comprises another reel 23 carrying three coils 24 of wire of the same diameter, for example 5 mm.
  • These three son constitute mounting frames 2b used in the composition of the frame cages 2. They are unwound simultaneously and positioned parallel, for example, in a triangle to be welded, by a welding station 25, on three sides of the frames 2a of the same reinforcement cage 2.
  • a conveyor belt 26 arranged between the frame machine 20 and the reel 23 makes it possible to bring the frames 2a towards an operator who grasps the frames 2a one after the other and presents them next to the welding machine 25 (cf. Fig. 4 ).
  • the gaps between the parallel frames 2a of the same reinforcement cage 2 are of course defined for each beam 1 to be manufactured. If the beams 1 to be manufactured have a length less than or equal to 8 meters, for example, a cage will be made of reinforcement 2 by beam 1. If their length is greater than 8 meters, two, or even three, reinforcement cages 2 per beam 1 will be realized.
  • a reinforcement cage 2 When a reinforcement cage 2 is completed, it is transferred to a preparation mat 28 by a supply chain 27 (cf. Fig. 4 ).
  • This preparation mat 28 extends parallel over the entire length of the casting bench 40 and receives the reinforcing cages 2 aligned one behind the other, as they are finished, and in the exact order their intended position in the corresponding mold 41.
  • the formwork spacers 4 and the anchoring pieces 6 (cf. Fig. 6 ) are interposed between the reinforcing cages 2, their handling being for example carried out by a spreader (not shown) placed at the beginning of the preparation mat 28.
  • prestressing cables 3 are threaded through the reinforcing cages 2 , formwork spacers 4 and anchors 6 along the entire length of the preparation belt 28.
  • the introduction of these prestressing cables 3 can be performed either manually, semi-automatically, or automatically using of a specific machine which is not the subject of the present invention.
  • a set of pre-assembled elements 5 corresponding to a predetermined mold 41 is obtained.
  • the formwork spacers 4 make it possible to delimit the beams 1 between each other in the same mold 41 and consist, for example, of a perforated metal plate whose number of holes corresponds to the number of prestressing cables 3.
  • the anchoring pieces 6 are used both for transporting said assembly 5, between the preparation A and molding B zones, and for the attachment of the prestressing cables 3 to the traction devices 50, 51 provided on the molding bench 40. example consist of metal combs.
  • this preparation zone A is designed to allow the operator to work in good ergonomic conditions, the conveyor belt 26 and preparation 28 being located at height of man, and to avoid any handling, the progress of the reinforcement cages 2 being controlled manually by push button, without physical effort.
  • the set of pre-assembled elements 5 is then conveyed into the appropriate mold 41, in a single operation, by specific gripping means 31 attached to the anchoring pieces 6.
  • These gripping means 31 are suspended from a rudder 30 , the latter being movable in translation along the three axes X, Y, Z on a traveling crane (cf. Fig. 3 and 5 ).
  • These gripping means 31 are arranged to lift in one piece each set of pre-assembled elements 5 by applying a tension to tension the prestressing cables 3, prevent buckling and facilitate its introduction into the mold 41 and that the introduction of said prestressing cables 3 in the traction devices 50, 51 described below.
  • the overhead crane spans the preparation A and B molding zones to allow the gripping means 31 to pass easily from one to the other A, B and C zones.
  • a new set of pre-assembled elements 5 can be prepared in the preparation zone A for filling another mold 41.
  • the prestressing cables 3 are tensioned by traction devices, commonly called trimmers 50, 51, disposed at the ends of the molds 41 in suitable pits 42 provided in the foundations 40 '(cf. Fig. 6A-6C ).
  • trimmers 50, 51 are provided: a fixed trimmer 50 and a trimmer 51 movable in rotation about a pivot 52 integral with the foundations 40 'between a rest position (cf. Fig. 6A ) in which it does not exert any traction on the prestressing cables 3 and a working position (cf. Fig.
  • trimmers 50, 51 in which it exerts a traction on these prestressing cables 3 in the direction of their length.
  • Rooms anchoring 6 sets of pre-assembled elements 5 provided at the ends for locking the prestressing cables 3 in the trimmers 50, 51.
  • These trimmers 50, 51 are designed to allow automatic threading of the prestressing cables 3 by a vertical movement from top to bottom and undoing by reverse movement. They are formed of parallel slats 53, vertical and separated by intervals 54 allowing the introduction of a prestressing cable 3 at intervals 54 (cf. Fig. 6C ). This new design saves a lot of time and automates threading.
  • prestressing cables are threaded manually and individually through through holes.
  • the movable trimmers 51 are each moved by a jack 55 of force, articulated at its two ends between a pivot 56 integral with the foundations 40 'and a pivot 57 integral with the trimmers 51.
  • a removable stop 58 makes it possible to limit the stroke of the movable tread 51, this abutment 58 being actuated by another jack 59.
  • the movable trimmers 51 make it possible to achieve a partial tension of the prestressing cables 3, for example 30 at 50% of the total voltage.
  • the final tensioning is carried out unitarily on each prestressing cable 3 by means for example of a monofilar jack.
  • each mold 41 is demolded in a single operation by the gripping means 31 of the rudder 30 which raises in one piece all the beams 1 and deposited on transport means 60 provided in the discharge zone C. A this effect, handling hooks (not shown) are provided in the upper part of the beams 1 to hook the gripping means 31 of said lifter 30.
  • the transport means consist, in the example shown, of an evacuation trolley 60 of the same length as the molding bench 40 and placed in parallel, between the molding bench 40 and the preparation mat 28 (cf. Fig. 2 and 3 ).
  • This evacuation trolley 60 is movable longitudinally for example on rails 61. It moves in front of a cutting station 62, where the prestressing cables 3 are cut between the successive beams 1, to separate the beams 1 from each other. the same set.
  • the cutting station 62 may comprise a torch, a circular saw, a chainsaw or any other suitable means.
  • the beams 1 may be conveyed transversely to an evacuation station 63 or longitudinally to the outside of the building for example, where the beams 1 are stored on a storage area (not shown), either in packets on pallets, either individually depending on their length.
  • the manufacturing method according to the invention and the installation implementing this method can significantly improve both the working conditions of the operators, the productivity of the production tool and the quality. beams 1 manufactured. Indeed, all the painful tasks inherent in traditional manufacturing are removed.
  • the prestressing cables 3 being housed inside the reinforcement cages 2 and pretended during their placement in the molds 41 are not likely to come into contact with the demolding oil covering the bottom and the walls of the molds. molds 41.
  • the manufacture of the reinforcing cages 2 being offset outside the molds 41 and computer-assisted ensures very good accuracy.
  • the absence of risky intervention such as the cutting of the prestressing cables 3 in the molds 41 makes it possible to preserve them and to avoid soiling.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Manufacturing Of Tubular Articles Or Embedded Moulded Articles (AREA)
  • On-Site Construction Work That Accompanies The Preparation And Application Of Concrete (AREA)
  • Rod-Shaped Construction Members (AREA)
  • Moulds, Cores, Or Mandrels (AREA)
EP03360144A 2002-12-16 2003-12-15 Procédé de fabrication de poutres en béton renforcé et installation mettant en oeuvre ledit procédé Expired - Lifetime EP1431015B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0215970 2002-12-16
FR0215970A FR2848589A1 (fr) 2002-12-16 2002-12-16 Procede de fabrication de poutres en beton et installation mettant en oeuvre ledit procede

Publications (2)

Publication Number Publication Date
EP1431015A1 EP1431015A1 (fr) 2004-06-23
EP1431015B1 true EP1431015B1 (fr) 2008-11-19

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ID=32338865

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Application Number Title Priority Date Filing Date
EP03360144A Expired - Lifetime EP1431015B1 (fr) 2002-12-16 2003-12-15 Procédé de fabrication de poutres en béton renforcé et installation mettant en oeuvre ledit procédé

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Country Link
EP (1) EP1431015B1 (es)
AT (1) ATE414598T1 (es)
DE (1) DE60324756D1 (es)
ES (1) ES2318101T3 (es)
FR (1) FR2848589A1 (es)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102717431B (zh) * 2012-07-06 2014-08-13 重庆亲禾预制品有限公司 一种预制梁生产方法
CN113752378A (zh) * 2021-09-10 2021-12-07 北京好运达智创科技有限公司 一种箱梁浇筑前橡胶棒及钢绞线穿束及抽拔系统
CN114030077B (zh) * 2021-11-15 2023-04-14 中国建筑土木建设有限公司 梁场的张拉千斤顶安装设备及预制梁的预应力索张拉方法
CN114102837A (zh) * 2021-11-16 2022-03-01 安徽省路港工程有限责任公司 一种自动运输混凝土并浇筑制备预制梁的系统

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2699951B1 (fr) * 1992-12-29 1995-03-03 Saret France Sa Procédé de fabrication de poutres en béton précontraint et poutres obtenues par ce procédé.
EP0812252A1 (de) * 1995-11-14 1997-12-17 FMG Verfahrenstechnik AG Verfahren und vorrichtung zum herstellen länglicher formkörper aus einem giessbaren material, insbesondere sturzbretter
FR2790991B1 (fr) * 1999-03-17 2001-05-25 Rector Sa Equipement pour la fabrication de poutrelles en beton precontraint et procede de mise en oeuvre

Also Published As

Publication number Publication date
FR2848589A1 (fr) 2004-06-18
ATE414598T1 (de) 2008-12-15
EP1431015A1 (fr) 2004-06-23
ES2318101T3 (es) 2009-05-01
DE60324756D1 (de) 2009-01-02

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