EP3109021B1 - Procede de fabrication de composants prefabriques en beton precontraint, en particulier seuils en beton precontraint ou traverses d'aiguillage en beton precontraint - Google Patents

Procede de fabrication de composants prefabriques en beton precontraint, en particulier seuils en beton precontraint ou traverses d'aiguillage en beton precontraint Download PDF

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Publication number
EP3109021B1
EP3109021B1 EP16173237.5A EP16173237A EP3109021B1 EP 3109021 B1 EP3109021 B1 EP 3109021B1 EP 16173237 A EP16173237 A EP 16173237A EP 3109021 B1 EP3109021 B1 EP 3109021B1
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EP
European Patent Office
Prior art keywords
cover
concrete
stabling
box
prestressed concrete
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
EP16173237.5A
Other languages
German (de)
English (en)
Other versions
EP3109021A1 (fr
Inventor
Lars Wobisch
Andre Hennig
Jens Reussner
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
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
Priority claimed from DE102015009566.8A external-priority patent/DE102015009566B4/de
Application filed by Leonhard Moll Betonwerke & Co KG GmbH filed Critical Leonhard Moll Betonwerke & Co KG GmbH
Priority to RS20180888A priority Critical patent/RS57489B1/sr
Priority to PL16173237T priority patent/PL3109021T3/pl
Publication of EP3109021A1 publication Critical patent/EP3109021A1/fr
Application granted granted Critical
Publication of EP3109021B1 publication Critical patent/EP3109021B1/fr
Priority to HRP20181247TT priority patent/HRP20181247T1/hr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • 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

Definitions

  • the invention relates to a process for the production of prestressed precast concrete parts, in particular prestressed concrete sleepers or prestressed concrete sleepers, wherein in at least one mold bed several moldings are produced by casting and the mold bed receives a variety of prestressing steels, between the moldings and in the end regions of the mold bed Abstellkal are used, on the one hand to fix the position of the prestressing steels and the geometry of the molding determining mold sheets during casting, and on the other hand to scarf the respective molding end and to create a space between adjacent moldings for later cutting the prestressing steels, according to the preamble of claim 1.
  • a mold is lined with a release film, and then a composition containing a binder is applied to the release film. After drying the mass is then stripping the mass from the mold.
  • a composition containing a binder is applied to the release film.
  • the lining of the mold with a release film direct contact between the mass and the mold is prevented. Remaining dried residual mass on the mold when stripping the object is avoided. This eliminates post-cleaning of the mold after the manufacturing process. It is achieved by the film that the component after removal of the film has a smooth surface. In order to adapt the release film to the contour of the mold, it is necessary to pull the film under vacuum, for example by means of a vacuum in the mold.
  • the film is placed over the mold and then a vacuum is created between the film and the mold so that the film comes to rest completely on the surface of the mold without wrinkles.
  • a simplification of the lining of the mold with foil is possible by heating the foil for lining the mold.
  • a formwork with the usual sloping walls or with flat bottom is provided with a shaped part with steep walls, which dissolves when stripping the formwork and up to sufficient hardening remains in the threshold, while at the same time the threshold formwork, using another similar shaped part, can be used again for the production of a new threshold.
  • each threshold is achieved by so-called storage boxes and / or similar equipment parts for separating and shelling of individual precast concrete parts.
  • the storage boxes have several functions. On the one hand, they serve to fix the location of the inserted molded sheets. Furthermore, the storage boxes fix the prestressing steels in the tension track during concreting. Finally, the storage boxes are used to shutter the emerging ends.
  • the storage boxes In the known method, the storage boxes must be pulled out at a time from the mold bed up when the concrete has a strength that allows him to no longer plastically deform alone. However, the concrete must not be so strong that the cement paste already adheres to the storage box. It is therefore necessary from the prior art to pull the storage boxes at such a time when the so-called green strength of the concrete is present and there is a sufficient connection between concrete and prestressing steel.
  • release agents in particular formwork oil
  • release agents in particular formwork oil
  • the method is based on a known manufacturing process for prestressed precast concrete parts, in particular prestressed concrete sleepers or prestressed concrete sleepers, wherein in at least one mold bed, a plurality of moldings is produced by casting.
  • the mold bed has a plurality of prestressing steels with a structured surface, wherein between the mold parts and in the end regions of the mold bed so-called storage boxes are used to fix the one hand, the position of the prestressing steels and the geometry of the molding determining mold sheets during casting, and on the other hand the respective Peel off molding end and to create a space between adjacent moldings for later cutting the prestressing steels.
  • the surfaces coming into contact with the concrete of the respective separating agent-free storage box are provided with a detachable, temporary, elastic properties-containing cover.
  • the cover has openings or openings for sealingly encompassing the prestressing steels. This means that the cover is not just the lighter Pulling the Abstellhimsten serves, but also effectively prevented by the sealing effect of the penetration of concrete or cement slurry into the interior of Abstellkastens.
  • the respective separating agent-free storage box is pulled in a known manner. Following this, the cover adhering to the finished part can then be removed.
  • the cover consists of a foamed material, in particular a plastic material, which has a water absorption capacity of ⁇ 5 vol .-%, in particular substantially at most 1 vol .-%.
  • the cover can also consist of a foamed material based on natural substances.
  • the cover preferably consists of a polyethylene foam material (PE).
  • PE polyethylene foam material
  • the preferably used polyethylene foam is closed-cell and fine-pored and has, for example, a thickness of 5 mm.
  • this is formed as a plate-shaped, elastic properties having cover.
  • This cover is used to separate the concrete from the actual storage box and surround it Storage box on the outside.
  • the cover slits and in the slots provided have adapted to the cross section of the prestressing steel recesses, in such a way that the cover is clamped and held relative to the prestressing steels form fit to the storage box and the Abstellkasten and the prestressing steel against the concrete during the Casting processes and seals during the curing process.
  • the elastic properties of the cover surprisingly secure the absorption of forces due to the changes in length during the curing process of the concrete. This too leads to a significantly improved quality of the manufactured precast concrete parts.
  • At least the surface facing away from the Abstellkasten surface of the cover has a predominantly smooth, fine-pored structure.
  • the concrete facing surface side of the cover with a structuring or embossing to identify the respective end face of the respective finished part in the form of a name, a type, a logo or the like.
  • the cover is formed as a flat blank or stamped part, wherein the blank or the stamped part corresponds in shape to the settlement of the respective storage box.
  • the cover has predetermined bending points or predetermined bending points in order to be able to easily envelop the storage box with the same.
  • the cover In the form of a storage box with a substantially U-shape with two lateral legs and a connecting leg, the cover at least the lateral or even the lateral and the connecting leg can be arranged overlapping.
  • the present as a flat blank cover can be placed from the top of the storage box and by folding or kinking lateral surfaces using the mentioned slots with the recesses between the Tensioning steels are spent and transferred to such a position that the corresponding exposed legs of the respective storage box are covered.
  • the mentioned predetermined bending or predetermined bending points which are adapted in their position to the dimensions of the storage box, facilitate the introduction of the cover in the region of the prestressing steels or prestressing steel penetrations.
  • a multi-part, in particular two-part cover which covers one of the lateral legs of the storage box.
  • a U-shaped or clip-like protective cover can be applied over the connecting leg, which is reusable.
  • Fig. 1 to 3 is used in the manufacture of prestressed concrete sleepers, in particular prestressed concrete sleepers in Longline method on storage boxes 1, which have a substantially U-shape with lateral legs 2 and a connecting leg 3.
  • the storage box 1 In the area of the connecting leg 3, the storage box 1 still has a projection 7 to attach there a stop means for pulling the Abstellkastens 1 and to fix the Abstellkasten in the tension track.
  • the storage box 1 thus serves to fix the position of mold plates, which are not shown in the figures, the fixation of the stressing during concreting in the tension track prestressing steels and ultimately the shuttering of the sleeper ends and the creation of a free space between two closely adjacent sleepers or precast concrete in the mold bed in order to be able to separate out the prestressing steel after hardening of the concrete and thus to separate the sleepers and to create space for a crane cross-beam for lifting the sleepers.
  • the respective storage boxes 1 according to the invention are surrounded with a cover made of a foamed plastic or natural material.
  • the cover 8 is formed in a preferred embodiment as a flat blank or stamped part and corresponds to the extent of the Abstellkastens.
  • the cover 8 has corresponding slots 9 to facilitate the threading and attachment to the storage box 1.
  • the cover 8 has in its side surfaces in the region of the slots 9 still formations 10, which are adapted in their contour or shape to the cross section of the respective prestressing steels 6.
  • the cover now seals well on the one hand at the threshold ends against cement slurry, so that it no longer runs in the storage boxes, and on the other hand ensures a separation layer between concrete and storage box. Due to the elastic properties, in particular air pockets, a slight pulling the storage boxes is possible even after complete curing of the concrete, in a way that can be dispensed with release agent.
  • Fig. 4 shows an exemplary side view of a simple cover with a purely exemplary dimension based on the formation of a predetermined bending or predetermined bending point 11 and with respect to the slots 9 and the apertures 10 for receiving the prestressing steels (see Fig. 1 to 3 ).
  • foamed plastics can be used in a particularly advantageous manner as the material for the cover 8.
  • These may in particular be PE plastic materials which have a water absorption capacity of less than 5% by volume, in particular up to a maximum of 1% by volume.

Landscapes

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

Claims (7)

  1. Procédé de fabrication de composants préfabriqués en béton précontraint, à savoir des traverses en béton précontraint ou des traverses d'aiguillage en béton précontraint, dans lequel plusieurs composants moulés sont réalisés par coulée dans au moins un lit de moulage et le lit de moulage reçoit une multitude d'aciers de précontrainte (6), des caissons de positionnement (1) sont mis en place entre les composants moulés et dans les zones d'extrémité du lit de moulage, afin de fixer d'une part pendant la coulée des tôles de moule qui déterminent la position des aciers de précontrainte et la géométrie du composant moulé et de décoffrer d'autre part l'extrémité respective du composant moulé et de créer un espace libre entre des composants moulés voisins pour la séparation ultérieure des aciers de précontrainte, dans lequel
    au moins les surfaces du caisson de positionnement (1) respectif dépourvu d'agent de démoulage qui viennent en contact avec le béton sont pourvues d'un recouvrement (8) temporaire soluble présentant des propriétés élastiques, le recouvrement (8) possède des ouvertures ou des traversées pour entourer avec étanchement les aciers de précontrainte (6), le caisson de positionnement (1) respectif dépourvu d'agent de démoulage est étiré de façon connue après durcissement complet du béton et ensuite le recouvrement (8) adhérant au composant préfabriqué est enlevé, caractérisé en ce que
    le recouvrement (8) est réalisé sous forme de flan surfacique ou de pièce poinçonnée surfacique qui correspond de par sa forme à la développée du caisson de positionnement respectif (1), le recouvrement (8) possède des emplacements destinés au coudage ou des emplacements destinés au pliage (11) afin d'envelopper par celui-ci complètement ou partiellement le caisson de positionnement (1), en outre le caisson de positionnement respectif (1) présente une forme en U ayant deux branches latérales (2) et une branche de liaison (3), et le recouvrement (8) est susceptible d'être agencé de manière à recouvrir les branches latérales (2) ou les branches latérales (2) et la branche de liaison (3).
  2. Procédé selon la revendication 1,
    caractérisé en ce que
    le recouvrement (8) est constitué d'un matériau en mousse, en particulier d'une matière plastique qui possède un pouvoir d'absorption d'eau de ≤ 5 % en volume, en particulier au maximum de 1 % en volume.
  3. Procédé selon la revendication 1,
    caractérisé en ce que
    le recouvrement est constitué d'un matériau en mousse à base d'une substance naturelle.
  4. Procédé selon la revendication 1,
    caractérisé en ce que
    le recouvrement est constitué d'un matériau en mousse de polyéthylène.
  5. Procédé selon l'une des revendications 1 à 4,
    caractérisé en ce que
    le recouvrement (8) est réalisé en forme de plaque qui, en vue d'une séparation entre le béton et le caisson de positionnement (1), entoure celui-ci du côté extérieur, de plus le recouvrement (8) possède des fentes (9) et des évidements (10) prévus dans la zone des fentes et adaptés à la section transversale des aciers de précontrainte (6), de telle sorte que le recouvrement (8) est retenu avec coincement sur le caisson de positionnement (1) et étanche le caisson de positionnement (1) ainsi que les aciers de précontrainte vis-à-vis du béton pendant l'opération de coulée et pendant le durcissement.
  6. Procédé selon la revendication 5,
    caractérisé en ce que
    le côté de la surface du recouvrement (8) dirigé vers le béton présente une structuration ou une empreinte pour caractériser le côté frontal respectif du composant préfabriqué respectif.
  7. Procédé selon la revendication 5 ou 6,
    caractérisé en ce que
    le recouvrement (8) présentant des propriétés élastiques encaisse les variations en longueur apparaissant pendant l'opération de durcissement du béton et les forces qui en résultent.
EP16173237.5A 2015-06-12 2016-06-07 Procede de fabrication de composants prefabriques en beton precontraint, en particulier seuils en beton precontraint ou traverses d'aiguillage en beton precontraint Active EP3109021B1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
RS20180888A RS57489B1 (sr) 2015-06-12 2016-06-07 Postupak za proizvodnju gotovih proizvoda od prednapregnutog betona, a naročito pragova za koloseke od prednapregnutog betona ili pragova za skretnice od prednapregnutog betona
PL16173237T PL3109021T3 (pl) 2015-06-12 2016-06-07 Sposób wytwarzania prefabrykatów z kablobetonu, zwłaszcza podkładów z kablobetonu lub podkładów zwrotnicowych z kablobetonu
HRP20181247TT HRP20181247T1 (hr) 2015-06-12 2018-08-03 Postupak za proizvodnju gotovih proizvoda od prednapetog betona, a naročito pragova za kolosijeke od prednapetog betona ili pragova za skretnice od prednapetog betona

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102015007558 2015-06-12
DE102015009566.8A DE102015009566B4 (de) 2015-06-12 2015-07-24 Verfahren und Vorrichtung für ein Verfahren zur Herstellung von Spannbetonfertigteilen, insbesondere Spannbetonschwellen oder Spannbetonweichenschwellen

Publications (2)

Publication Number Publication Date
EP3109021A1 EP3109021A1 (fr) 2016-12-28
EP3109021B1 true EP3109021B1 (fr) 2018-06-06

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Application Number Title Priority Date Filing Date
EP16173237.5A Active EP3109021B1 (fr) 2015-06-12 2016-06-07 Procede de fabrication de composants prefabriques en beton precontraint, en particulier seuils en beton precontraint ou traverses d'aiguillage en beton precontraint

Country Status (3)

Country Link
EP (1) EP3109021B1 (fr)
PL (1) PL3109021T3 (fr)
RS (1) RS57489B1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2736587C1 (ru) * 2020-03-20 2020-11-18 Акционерное Общество "Научно-Исследовательский И Проектно-Конструкторский Институт Энергетических Технологий "Атомпроект" Способ группового бессварного соединения продольной стержневой арматуры при монтаже укрупненных армоопалубочных блоков сложных технических объектов из монолитного железобетона

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL9100251A (nl) * 1991-02-13 1992-09-01 Voorbij Groep Bv Werkwijze en inrichting voor het vervaardigen van een aantal aangrenzende voorwerpen alsmede kopschot en afdichtplaat.
NL9300605A (nl) * 1993-04-07 1994-11-01 Bonna Vianen Kopschot voor het vervaardigen van voorgespannen betonnen palen, alsmede werkwijze daarvoor.
NL1004064C2 (nl) * 1996-09-18 1998-03-19 Leenstra Machine En Staalbouw Inrichting voor het vervaardigen van heipalen.
DE10163138A1 (de) 2001-12-20 2003-07-10 Johannes Peine Verfahren und Vorrichtung zur Herstellung eines Bauelementes
DE102006042910A1 (de) 2006-09-13 2008-03-27 Ed. Züblin Ag Betonschwellenherstellung mit Einlegeformteil

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
PL3109021T3 (pl) 2018-12-31
RS57489B1 (sr) 2018-10-31
EP3109021A1 (fr) 2016-12-28

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