EP3424662B1 - Procédé de fabrication de pièces préfabriquées en béton précontraint - Google Patents

Procédé de fabrication de pièces préfabriquées en béton précontraint Download PDF

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Publication number
EP3424662B1
EP3424662B1 EP18178380.4A EP18178380A EP3424662B1 EP 3424662 B1 EP3424662 B1 EP 3424662B1 EP 18178380 A EP18178380 A EP 18178380A EP 3424662 B1 EP3424662 B1 EP 3424662B1
Authority
EP
European Patent Office
Prior art keywords
parts
molding bed
bed
fastening
molding
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.)
Active
Application number
EP18178380.4A
Other languages
German (de)
English (en)
Other versions
EP3424662A1 (fr
Inventor
Pierre Paulin
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.)
Leonhard Moll Betonwerke & Co KG GmbH
Original Assignee
Leonhard Moll Betonwerke & Co KG GmbH
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Priority claimed from DE102017125152.9A external-priority patent/DE102017125152B4/de
Application filed by Leonhard Moll Betonwerke & Co KG GmbH filed Critical Leonhard Moll Betonwerke & Co KG GmbH
Priority to PL18178380T priority Critical patent/PL3424662T3/pl
Publication of EP3424662A1 publication Critical patent/EP3424662A1/fr
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Publication of EP3424662B1 publication Critical patent/EP3424662B1/fr
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    • 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
    • B28B23/0056—Means for inserting the elements into the mould or supporting them in the mould
    • 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
    • B28B23/022—Means for inserting reinforcing members into the mould or for supporting them in the mould
    • B28B23/024—Supporting means
    • B28B23/026—Mould partitionning elements acting as supporting means in moulds, e.g. for elongated articles
    • 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

Definitions

  • the invention relates to a method for the production of prestressed concrete prefabricated parts which have cast or molded-in fastening devices or built-in parts, namely prestressed concrete sleepers or prestressed concrete switch sleepers with means for rail fastening, with molded parts being produced by casting in at least one mold bed and the mold bed accommodating a large number of prestressing steels, furthermore Storage boxes or plates are inserted between the molded parts and / or in the end regions of the mold bed and, after the concrete has hardened, the molded parts are removed from the respective mold bed according to the teaching of claim 1.
  • the teaching there is aimed at the use of turnout sleepers made of prestressed concrete, which can be manufactured in practically any length in a long prestressed bed.
  • the problem that is worked out is that the positioning of the built-in parts for fastening the rails, the position of which in turnout sleepers changes due to the curvature of the track, not only changes from sleeper to sleeper, but also takes into account that the rail axes are below the sleeper axes different, usually not right angles.
  • matrices made of sheet steel are used as the shuttering base, which have bores at the respective positions of the built-in parts, in which fastening means for temporarily fixing the built-in parts can be attached.
  • a blind rivet that can be inserted and knocked in from above as a temporary connecting means, which is pushed with the shaft from above through a hole in a fastening part fixing the mounting part and through the hole determining the position of the mounting part in the bottom of the formwork and on the outside of the shuttering base is anchored by a rivet head-like expansion.
  • the need remains to have to arrange holes in the shuttering base at different points for each individual turnout sleeper. For this purpose, either a large number of matrices with bores arranged at the different points must be kept or new bores must be generated in each case according to the specifications of the individual case.
  • the starting point is to realize concrete railway sleeper blocks of different lengths in the area of a switch with different numbers of fastening devices, each arranged at a predetermined distance from one another, with the greatest possible accuracy and at the lowest possible cost.
  • a large number of matrices, each provided with differently arranged holes, each of different lengths corresponding to the desired lengths of the respective differently dimensioned railway sleeper blocks for the construction of a specific railroad switch is prefabricated.
  • a fastening device is detachably attached in each hole of the die.
  • the dies are placed in the mold bed for butt pouring the plurality of contiguous concrete bodies. Before the concrete body is cut, the matrices are removed from it and the fastening devices cast therein.
  • Markings are provided on the sides of the matrices in such a way that the type of turnout and the sequence number of the respective blocks under the railway sleeper blocks assigned to the turnout can be clearly recognized from the top of the blocks.
  • a transverse strip for example a plastic strip, is arranged between two successive dies in the mold bed.
  • a series of dies is placed in an elongated bed to form the bottom of a molding bed.
  • the dies are provided with holes.
  • Special die shells can be inserted into these bores or recesses, which are tailored to the dimensions of the rail fastening arrangements.
  • the die shells are provided with flanges, which are supported on the inner surface of the actual die and are in contact there.
  • the US 2008/139321 A1 shows an arrangement with a magnetically fixable connecting sleeve.
  • the object of the invention to provide a further developed method for the production of prestressed precast concrete parts which have cast or molded fastening devices or built-in parts, these being prestressed concrete sleepers or prestressed concrete turnout sleepers with means for rail fastening.
  • the method according to the invention should be suitable for both the so-called long-line production and the circulation production of sleepers, with all different geometries and positions of the rail fastening points of the individual sleepers being able to be implemented in the molded part.
  • a laborious change of base plates or matrices, as is necessary in the prior art, should be dispensed with.
  • a known mold bed is used as a starting point for the production of pre-stressed concrete parts which have cast or molded-in fastening devices or built-in parts, namely prestressed concrete sleepers or prestressed concrete turnout sleepers with means for rail fastening, in order to produce corresponding molded parts by casting.
  • the mold bed can accommodate a variety of prestressing steels.
  • storage boxes or shelves can be used between the molded parts and / or in the end regions of the mold bed, so that molded parts of different lengths can be produced.
  • the molded parts are removed from the respective mold bed in a manner known per se, the prestressing steels being able to be severed in predetermined areas.
  • Free base plates are placed in the mold bed or in the mold trough by fastening devices and built-in parts, or mold beds provided with such base plates are used.
  • the storage boxes or the storage plates are set and the fastening devices or built-in parts are fixed precisely to the respective base plate by means of permanent magnetic holding devices.
  • the insertion of the fastening devices or built-in parts with the aid of the permanent magnetic holding devices can be carried out with the aid of a setting jig.
  • the permanent magnetic holding devices can be designed, for example, in the form of a bolt or a pin, with a corresponding number of permanent magnets being used in the fastening area.
  • a fastening dowel can then be pushed over such a bolt or pin, which is later encased by the concrete and fixed in the concrete.
  • the fastening devices or the built-in parts comprise a molded body that can be used repeatedly for forming beads in the molded part and / or a dowel holder as mentioned above.
  • the molded body and the dowel holder can be made in one piece but also in several parts.
  • the storage boxes or the storage plates have a foot section for receiving one or more permanent magnets and are also permanently magnetically fixed to the base plate or lateral shaped plates.
  • the fastening devices, built-in parts, storage boxes and / or storage panels are fixed by means of switchable holding devices having permanent magnetic properties.
  • the permanent magnet can be deactivated when the holding devices are set, as a result of which position corrections can be implemented more easily until the desired positions of the holding devices are finally reached.
  • the fastening device is designed as a metallic beaded plate with pre-assembled dowels, a switchable permanent magnet being arranged or used at the intended position in the mold bed to fix the beaded plate in its position in relation to the mold bed, with the prestressing steels being reclamped or relaxed the permanent magnetic fixation is canceled in such a way that the bead plate can be shifted in position. Due to this solution according to the invention, the formation of bead cracks in the molded part is avoided.
  • the switchable permanent magnets can be both stationary and movable, but can be fixed in position in the mold bed.
  • the elastic seal closes the mold bed to a mold trough in which the mold bed is located and enables the horizontal movement of the beaded plate when it is reclamped.
  • the mold bed itself can have integral shelves or storage boxes and in this respect already have fixed side walls that have recesses for leading through the prestressing steel.
  • the device not according to the invention for the production of prestressed concrete precast elements is based on the fact that the respective fastening devices or built-in parts are received by a holding device.
  • the holding device is as
  • Bolt, pin, stamp, plate or the like means executed, at least portions of this means being permanently magnetically or permanently magnetically switchable or receiving at least one switchable or non-switchable permanent magnet.
  • a molded body in particular designed as a beaded plate, is designed to be switchable permanent magnet, accommodates such a switchable permanent magnet or consists of a ferromagnetic material that can interact with a switchable permanent magnet.
  • At least one magnet in particular a switchable permanent magnet, is provided in order to releasably fix the holding device and / or the molded body.
  • the device described can be used in both circulating and long-line production systems for the production of pre-stressed concrete parts.
  • the Fig. 1 shows a view into the interior of a mold bed for the production of a prestressed concrete part, in particular a prestressed concrete switch sleeper.
  • a base plate 2 free of fastening devices or built-in parts is introduced or inserted into a mold bed 1, or the mold bed consists of a trough with an integrated base plate.
  • These holding devices comprise a molded body 3, e.g. for forming a bead in the molded part, and a dowel holder 4.
  • the dowel holder 4 is implemented as a pin or bolt and already accepts the later fastening dowels 5.
  • the Fig. 2 illustrates the state of several mold beds with base plate 2. Furthermore, the molded body holding parts 3 together with the dowel holder 4 can be seen. The shelves or storage boxes 6 are used completely assembled.
  • the Fig. 3 shows an underside view of the holding devices comprising molded bodies 3 and dowel holders 4 with magnets 10 inserted there.
  • FIG. 4 the bottom view of an exemplary embodiment of a storage panel 6 with foot section 11 is shown, permanent magnets 12 also being introduced into a cavity of the foot section 11.
  • a sleeper shape 13 for the production of sleepers is assumed, the sleepers having beads to hold the track fastening and dowels for holding the corresponding track fastening screws.
  • a correspondingly preassembled bead plate 15 provided with dowels 14 is fixed in the area of the bottom of the mold 13 within a mold trough 16 with the aid of a switchable permanent magnet 17.
  • the switchable permanent magnet 17 is deactivated before reclamping, that is to say relaxation, by releasing the tensioning wire holder 20.
  • reclamping that is to say relaxation
  • the corresponding bead plates 15 can therefore shift, so that the risk of the extremely problematic bead crack formation is significantly minimized. Stress peaks, which would otherwise lead to cracking, are avoided from the outset.
  • a temporary, elastic seal 21 is inserted between the beading plate 15 and the mold bed.
  • Another advantage of the solution according to the invention is that another molded part can be manufactured immediately in or with the same mold. Complex modifications of the molds previously required for different fastening systems can be dispensed with, so that more flexible production is possible.
  • the Fig. 6 shows a cross section of a turnout sleeper tensioning track with variants of the magnetic fixation of holding devices.
  • a magnet 22 that is fixed over the entire length of the tensioning track or else one or more displaceable magnets 22 is located below the base plate 2 of the mold trough 1.
  • the molded body 3 consists of a metallic material for forming beads in the molded part and for receiving the dowel 5. It is not necessary to attach or introduce magnets with respect to the holding device 3.
  • the field lines of the respective magnetic fields are indicated with the reference numeral 23.

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing Of Tubular Articles Or Embedded Moulded Articles (AREA)
  • Moulds, Cores, Or Mandrels (AREA)

Claims (6)

  1. Procédé de fabrication de pièces préfabriquées en béton précontraint qui présentent des dispositifs de fixation ou des éléments encastrés intégrés par coulée ou moulage, à savoir de traverses en béton précontraint ou de traverses d'aiguillage en béton précontraint ayant des moyens pour la fixation de rails,
    dans lequel
    des pièces moulées sont fabriquées par coulée dans au moins un lit de moulage, et le lit de moulage reçoit une pluralité de barres d'acier de précontrainte (8), en outre des caissons de pose ou des tôles de pose (6) sont inséré(e)s entre les pièces moulées et/ou dans les zones d'extrémité du lit de moulage, et après le durcissement du béton, les pièces moulées sont retirées du lit de moulage respectif,
    en outre, des tôles de fond exemptes de dispositifs de fixation ou d'éléments encastrés sont introduites dans le lit de moulage, ou des lits de moulage, pourvus de telles tôles de fond et représentant un bac, sont utilisés, les caissons de pose ou les tôles de pose (6) sont placé(e)s selon les dimensions de longueur souhaitées de la pièce moulée, et les dispositifs de fixation ou les éléments encastrés sont fixés sur la tôle de fond respective conformément aux dimensions exactes, au moyen de dispositifs de maintien (3 ; 5) à aimants permanents,
    caractérisé en ce que
    la fixation des dispositifs de fixation, des éléments encastrés, des caissons de pose et/ou des tôles de pose (6) s'effectue au moyen de dispositifs de maintien commutables à aimants permanents,
    le dispositif de fixation est réalisé sous la forme d'une plaque métallique à moulures (15) ayant des chevilles pré-montées (14),
    en outre, un aimant permanent commutable (17) est disposé ou inséré à la position prédéterminée dans le lit de moulage (16) afin de fixer la plaque à moulures (15) dans sa position par rapport au lit du moulage (16), et
    avant le remontage ou le desserrage des barres d'acier de précontrainte, la fixation à aimants permanents est supprimée, de manière à permettre un déplacement de la position des plaques à moulures (15), ce qui permet d'éviter la fissuration des moulures dans la pièce moulée.
  2. Procédé selon la revendication 1,
    caractérisé en ce que
    les dispositifs de fixation ou les éléments encastrés comprennent un corps de moulage réutilisable (3) pour former des moulures dans la pièce moulée, et/ou un support de cheville (4).
  3. Procédé selon la revendication 1,
    caractérisé en ce que
    le ou les aimants permanents commutables (17) sont disposés de manière stationnaire ou déplaçable, mais fixable en position, dans le lit de moulage (13; 16).
  4. Procédé selon la revendication 1 ou 3,
    caractérisé en ce que
    un joint d'étanchéité élastique temporaire (21) est inséré entre la plaque à moulures (15) et le lit de moulage.
  5. Procédé selon la revendication 4,
    caractérisé en ce que
    le joint d'étanchéité élastique (21) referme le lit de moulage vers un bac de moulage (16) dans lequel se trouve le lit de moulage (13).
  6. Procédé selon l'une des revendications 1 à 5,
    caractérisé en ce que
    le lit de moulage comprend des tôles de pose ou des caissons de pose, formé(e)s d'un seul tenant, ou des parois latérales.
EP18178380.4A 2017-06-23 2018-06-19 Procédé de fabrication de pièces préfabriquées en béton précontraint Active EP3424662B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL18178380T PL3424662T3 (pl) 2017-06-23 2018-06-19 Sposób wytwarzania elementów prefabrykowanych z betonu sprężonego

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102017113986 2017-06-23
DE102017125152.9A DE102017125152B4 (de) 2017-06-23 2017-10-26 Verfahren zur Herstellung von Spannbetonschwellen oder Spannbetonweichenschienen

Publications (2)

Publication Number Publication Date
EP3424662A1 EP3424662A1 (fr) 2019-01-09
EP3424662B1 true EP3424662B1 (fr) 2021-06-09

Family

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Application Number Title Priority Date Filing Date
EP18178380.4A Active EP3424662B1 (fr) 2017-06-23 2018-06-19 Procédé de fabrication de pièces préfabriquées en béton précontraint

Country Status (2)

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EP (1) EP3424662B1 (fr)
PL (1) PL3424662T3 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111452210B (zh) * 2020-04-09 2021-03-23 苏州杰通建筑工业有限公司 一种精准定位幕墙安装用预埋钢板的精品预制梁生产方法

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE415868B (sv) 1978-12-05 1980-11-10 A Betong Ab Sett att tillverka betongsliperbolock samt matrisuppsettning for utforande av settet
JP2614733B2 (ja) * 1987-11-12 1997-05-28 大和工業株式会社 Ｐｃマクラギの製造方法
SE470359B (sv) 1992-06-18 1994-01-31 Abetong Teknik Ab Sätt att tillverka för en spårväxel avsedda betongsliperblock samt matris och matrisuppsättning för användning vid sättets tillämpning
DE4237466C2 (de) 1992-11-06 2002-01-17 Dyckerhoff & Widmann Ag Vorrichtung zum Befestigen eines Einbauteils in einer Schalung zum Herstellen von Fertigbauteilen aus Beton
US20080139321A1 (en) * 2006-10-20 2008-06-12 Jvi Magnetics, Inc. Splice sleeve magnet assembly and method thereof
CN203045966U (zh) * 2012-12-26 2013-07-10 北京中铁房山桥梁有限公司 磁力橡胶隔板

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
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Publication number Publication date
PL3424662T3 (pl) 2021-11-08
EP3424662A1 (fr) 2019-01-09

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