EP0579809B1 - Procede et dispositif de fabrication d'elements prefabriques en beton precontraint a tension immediate, notamment de traverses en beton precontraint - Google Patents

Procede et dispositif de fabrication d'elements prefabriques en beton precontraint a tension immediate, notamment de traverses en beton precontraint Download PDF

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Publication number
EP0579809B1
EP0579809B1 EP93903923A EP93903923A EP0579809B1 EP 0579809 B1 EP0579809 B1 EP 0579809B1 EP 93903923 A EP93903923 A EP 93903923A EP 93903923 A EP93903923 A EP 93903923A EP 0579809 B1 EP0579809 B1 EP 0579809B1
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EP
European Patent Office
Prior art keywords
tensioning
wires
prestressed concrete
wire
frame
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
EP93903923A
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German (de)
English (en)
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EP0579809A1 (fr
Inventor
Joachim Heintz
Peter Auer
Helmut Lieske
Peter Plica
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.)
Walter Bau AG
Original Assignee
Dyckerhoff and Widmann AG
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Filing date
Publication date
Application filed by Dyckerhoff and Widmann AG filed Critical Dyckerhoff and Widmann AG
Publication of EP0579809A1 publication Critical patent/EP0579809A1/fr
Application granted granted Critical
Publication of EP0579809B1 publication Critical patent/EP0579809B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
    • E01B3/00—Transverse or longitudinal sleepers; Other means resting directly on the ballastway for supporting rails
    • E01B3/28—Transverse or longitudinal sleepers; Other means resting directly on the ballastway for supporting rails made from concrete or from natural or artificial stone
    • E01B3/32—Transverse or longitudinal sleepers; Other means resting directly on the ballastway for supporting rails made from concrete or from natural or artificial stone with armouring or reinforcement
    • E01B3/34—Transverse or longitudinal sleepers; Other means resting directly on the ballastway for supporting rails made from concrete or from natural or artificial stone with armouring or reinforcement with pre-tensioned armouring or reinforcement
    • 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 invention relates to a device for producing prefabricated components from prestressed concrete with an immediate bond, in particular prestressed concrete sleepers, according to the preamble of patent claim 1.
  • Prestressed concrete sleepers are pronounced mass-produced articles, in which everything is important, at least while preserving, but if possible, while improving the quality, saving manufacturing costs. This can be done either by saving material for the sleepers themselves or by saving manufacturing costs, either in terms of the equipment to be kept available for production or in terms of the working time to be used.
  • the saving of material for the sleeper itself is in the foreground with a known prestressed concrete sleeper, in which the reinforcement of the monolithic sleeper body consists of individual tensioning elements in the form of steel bars, wires or strands that cross each other in the middle of the sleeper in a vertical plane and from there radiate straight to the threshold ends (DE-A-38 32 504).
  • This known prestressed concrete sleeper can be produced both with prestressing against the hardened concrete and subsequent bonding, as well as in the prestressing bed, i.e. with an immediate bond.
  • the sleepers in the prestressed bed in which the individual tension wires are anchored at their ends by means of an adhesive bond, for example, the costs for the anchoring parts of the individual prestressing elements that have to be tensioned against the hardened concrete in the case of prestressed concrete sleepers with a subsequent connection can be avoided.
  • Prestressed concrete sleepers with an immediate bond are usually manufactured in a long prestressed bed.
  • the tension wires are first laid out, tensioned against fixed end abutments and concreted in in the tensioned state.
  • a large number of formwork forms are required, which are to be arranged on the fitted bed.
  • the tension wires are only released from their anchors or cut between the individual sleepers after the hardening of the sleeper bodies, whereby the tension force entered as tensile force in the tension wires is transmitted to the sleepers as pretensioning force.
  • the tensioning wires are first cut to length, then inserted into the tensioning frame and tensioned relative to the tensioning frame by means of a tensioning device integrated in the tensioning frame.
  • the invention is based on the object in the manufacture of prestressed concrete sleepers with an immediate bond using a stenter economic way of working, especially to improve the processes of inserting the tensioning wires into the tensioning frame and the tensioning process itself, above all to simplify and accelerate it.
  • the basic idea of the invention is that the tensioning wires, which run directly from one or more wire rolls, are introduced into the tensioning frame by means of a wire guide device that can be brought into the plane of the tensioning frame. This makes it possible to bring the individual tensioning wires into the intended position in the tensioning frame in free feed, which is particularly important in the case of tensioning wires which do not run parallel in the respective prefabricated components but, as described at the beginning, cross each other.
  • the wire guide device is expediently equipped with a number of guide channels for one tension wire each; it allows a simultaneous guided and thus orderly and sag-free insertion of all wires, both with parallel as well as with crossing wires for prestressed concrete sleepers. This not only eliminates the need to arrange the tensioning wires after pulling them in; since the tension wires have no or at least all the same sag, the pretension can be applied simultaneously and in one go.
  • the sleeper body 1 consists of two comparatively wide lateral support bodies 2 and 3, which carry the rail fastening (not shown for the sake of clarity) and a central part 4 with a comparatively narrow, high cross-section.
  • the prestressing reinforcement consists of eight straight tension wires 5, which are additionally labeled a to h to make their course clear.
  • the prestressing reinforcement comprises two pairs of tension wires a and b or e and f, which penetrate the sleeper body 1 parallel to its longitudinal axis, and two further pairs of tension wires c and d or g and h, which cross each other in the central axis of the sleeper body 1 .
  • the end anchors of the tensioning wires 5, which are made by adhesive bonding, are evenly distributed at the ends of the threshold over its cross section (FIG. 3); in the central axis of the sleeper body 1, the tension wires 5 are very strongly concentrated in a vertical axis (FIG. 4).
  • the relatively wide support body 2, 3 with slim Middle part 4 of the sleeper body 1 enables, of course, other embodiments are also conceivable and can be realized with the device according to the invention, for example reinforcements which consist exclusively of parallel tension wires, as well as reinforcements which consist exclusively of tension wires crossing one another in the central axis.
  • the pre-tensioning wires 5 In order to be able to produce a pre-stressed concrete tie with an immediate bond in this way, the pre-tensioning wires 5 must be brought together in advance in a position that results in the desired reinforcement, tensioned in this position and held within a formwork form until the concrete in which the tensioning wires are embedded are inserted, compacted and hardened in the formwork. This is done according to the invention by means of a tenter and by means of a device which is shown schematically in FIGS. 5 and 6.
  • the device according to the invention comprises a feed path 6 which extends over rows of supports 7 and over which a number of clamping frames can be pushed in the direction of arrow 9, of which only one clamping frame 8 is shown.
  • a support structure for a stenter frame is sufficient if these are fed in in another way.
  • a station S is formed, at which the tensioning wires 5 can be fed and brought into their positions in the tensioning frame 8.
  • the station S is assigned a feed device 11 for the tensioning wires 5, which also has a number of driven roller pairs 12 corresponding to the number of wires, and a tensioning device 13 which is supported in a bridge-like manner with respect to the tensioning frame 8 by means of two tensioning cylinders 14.
  • the feed device 11 and the tensioning device 13 are combined as a unit on a carriage 15, which can be moved by means of rollers 16 in the direction of the axis of symmetry of the reinforcement to be produced, in order to be able to absorb the elongation of the wires occurring during tensioning.
  • the tensioning device 13 is equipped with a clamping device 17 known per se, by means of which the tensioning wires 5 running between the clamping plates can be fixed and released again by a single lifting movement.
  • the tenter frame 8 consists of a rectangular frame made of two side longitudinal members 18, a front edge cross member 19, a rear edge cross member 20 and a central cross member 21.
  • the stenter frames 8 are expediently formed as a steel structure from rolled sections. 5 and 6 comprises four positions I to IV, in each of which a prestressed concrete sleeper can be produced. Corresponding to these positions, clamping anchors 17, which correspond to those on the tensioning device 13, are arranged in the region of the edge cross members 19 and 20.
  • rollers 22 for deflecting the crossed tension wires.
  • the device according to the invention is operated as follows: On the feed path 6, a number of clamping frames 8 are guided in the horizontal direction to the wire feed and clamping station S shown in the drawing. Once a 5 has reached the position shown in Fig. 5, the tension wires 5 are advanced by the wire rings 10 by means of the feed device 11 in the direction of arrows 23 and brought into the position required for the respective reinforcement in positions I and II.
  • the positioning of the individual tensioning wires 5 is served by a wire guide device 24, of which two identical units are arranged one behind the other in the direction of the reinforcement axis.
  • the wire guide devices 24 can be brought into the plane of the clamping frame 8 by a vertical lifting movement or can also be removed from this plane. From this wire guide device 24, which will be explained in more detail with reference to FIGS. 7 to 10, the left unit is raised into the plane of the clamping frame 8 according to FIG. 6, the right unit is shown lowered.
  • a clamping frame 8 can be moved into the station S in a horizontal feed.
  • the two wire guide devices 24 are then raised in the positions I and II of the clamping frame 8.
  • the tension wires 5 are inserted and first anchored to the front edge cross member 19 by means of the clamping anchor 17.
  • the tensioning wires 5 are tensioned by means of the tensioning device 13 and also anchored by means of the clamping anchor 17 on the rear edge cross member 20.
  • the wires 5 are cut by means of a wire cutting device 25 and the clamping anchor 17 on the tensioning device 13 is released.
  • the clamping frame 8 is transported in the feed direction (arrow 9) until the positions III and IV in the station S are above the wire guide device 24.
  • the tensioning wires 5 are inserted, tensioned and anchored in the same way at these positions.
  • the tensioning frame 8 provided with tensioning wires in this way is then transported further in the feed direction (arrow 9). It is then brought together with the formwork that is pushed over the tensioned tension wires and into which the concrete can finally be introduced.
  • the formwork can be removed before the concrete has completely hardened by means of immediate demoulding.
  • the tentering frames are left in their position with respect to the fresh sleepers until the concrete has completely hardened and the tensioning force can be transferred to the sleeper body by loosening the clamping anchors 17. Thereafter, the tenter 8, if necessary, cleaned and reused via the feed path.
  • a wire guide device 24 is shown in plan view in FIG. 7 and in further views or sections in FIGS. 8 to 10.
  • the wire guide device 24 is used to position the tensioning wires 5 for reinforcement, as is the case with a prestressed concrete sleeper according to FIGS. 1 to 4.
  • this reinforcement arrangement is chosen only as an example; the wire guide device 24 according to the invention can of course also be used in an analogous manner for other forms of reinforcement.
  • the wire guide device 24 consists of a number of partly fixed, partly movable components, two of which each form guide channels 30 for a tensioning wire 5 in the closed state shown in FIGS. 7 and 8a and 9a. 7, according to the image of the reinforcement symmetrical to the central axis of the threshold, consists of two fixed triangular inner parts 31 and two fixed, also triangular outer parts 32. Two movable outer parts 33 and two movable inner parts 34 interact with these.
  • the movable parts 33 and 34 have longitudinal grooves in the surfaces facing the fixed parts 31 and 32, respectively, which are closed in cooperation with the flat surfaces of the fixed parts 31 and 32, respectively Form guide channels 30 (Fig. 8a, 9a).
  • FIG. 8a shows in the end view along the line VIII-VIII in FIG. 7 the reinforcement guide which approximately corresponds to the end view of the sleeper according to FIG. 3.
  • FIG. 9 shows, in section along the line IX-IX in FIG. 7, an image roughly corresponding to the cross section of FIG. 4.
  • Fig. 10 still shows the arrangement of the grooves in the inner surface of the movable outer part 33 in a view along the line X-X in Fig. 7.
  • the upper and lower guide channels serve to guide the parallel wires 30a and 30f;
  • the middle guide channels serve to guide the crossing wires 30h and 30g on the left side of the outer part 33 and 30c and 30d on the right side.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing Of Tubular Articles Or Embedded Moulded Articles (AREA)
  • On-Site Construction Work That Accompanies The Preparation And Application Of Concrete (AREA)
  • Reinforcement Elements For Buildings (AREA)
  • Wire Processing (AREA)
  • Devices For Post-Treatments, Processing, Supply, Discharge, And Other Processes (AREA)
  • Curing Cements, Concrete, And Artificial Stone (AREA)

Claims (8)

  1. Dispositif pour fabriquer des éléments préfabriqués en béton précontraint à tension immédiate, notamment des traverses en béton précontraint, avec au moins un cadre de précontrainte et des dispositifs d'ancrage disposés sur ce cadre pour les fils de précontraintes, ainsi qu'avec un dispositif tendeur pour tendre les fils de précontrainte, caractérisé en ce qu'un appareil d'avancement (11) et un dispositif sectionneur (25) pour les fils de précontrainte (5) précèdent un dispositif de soutien pour l'appui à plat d'un cadre de précontrainte (8), afin d'y introduire les fils de précontrainte (5) déroulés d'un ou plusieurs rouleaux de fil (10), et un dispositif tendeur (13) pour tendre les fils de précontrainte (5), disposé en dehors du cadre de précontrainte (8) et s'appuyant contre ce dernier, est associé à ce dispositif de soutien, et en ce qu'au moins un dispositif (24) de guidage de fils, pourvu de canaux de guidage (30) pour l'enfilage des fils de précontrainte (5), est disposé dans la région du dispositif de soutien et peut, par translation verticale, être amené dans le plan du cadre de précontrainte (8) dans une position permettant l'introduction des fils de précontrainte (5), et être sorti de ce plan.
  2. Dispositif selon la revendication 1, caractérisé en ce que le dispositif de soutien est réalisé sous la forme d'un poste (S) au cours du développement d'une voie d'avancement (6) pour des cadres de précontrainte (8) qui s'étend dans un plan horizontal.
  3. Dispositif selon la revendication 1 ou 2, caractérisé en ce que le dispositif tendeur (13) est disposé, vu dans la direction d'avancement des fils de précontrainte (5), avant le dispositif de soutien.
  4. Dispositif selon l'une quelconque des revendications 1 à 3, caractérisé en ce que le dispositif tendeur (13) est monté à translation dans la direction d'avancement des fils de précontrainte (5).
  5. Dispositif selon l'une quelconque des revendications 1 à 4, caractérisé en ce que l'appareil d'avancement (11) et le dispositif tendeur (13) sont réunis en une unité montée à translation dans la direction d'avancement des fils de précontrainte (5).
  6. Dispositif selon l'une quelconque des revendications 1 à 5, caractérisé en ce que le dispositif (24) de guidage de fils est disposé en dessous de la voie d'avancement (6) pour les cadres de précontrainte (8).
  7. Dispositif selon l'une quelconque des revendications 1 à 6, caractérisé en ce que le dispositif (24) de guidage de fils est réalisé sous la forme d'une construction avec des canaux de guidage (30) adaptés à la position respectivement prédéfinie dans l'espace des fils de précontrainte (5) utilisés comme armature, canaux dans lesquels les fils de précontrainte (5) peuvent être enfilés par une extrémité, les canaux de guidage (30) pouvant, en les ouvrant le long de joints de séparation s'étendant en direction longitudinale, être amenés d'un état fermé, permettant le guidage des fils de précontrainte (5) lors de leur avancement, à un état ouvert, permettant d'enlever la construction de la région de l'armature à trois dimensions.
  8. Dispositif selon la revendication 7, caractérisé en ce que les canaux de guidage (30) sont formés par des rainures s'étendant essentiellement longitudinalement dans les faces latérales d'éléments de construction (33, 34) qui, en vue de l'ouverture ou, selon le cas, de la fermeture des canaux de guidage (30) peuvent être déplacés transversalement à l'axe longitudinal de l'armature par rapport à des éléments de construction fixes (31, 32) par des faces planes s'étendant parallèlement à ces derniers.
EP93903923A 1992-02-11 1993-02-08 Procede et dispositif de fabrication d'elements prefabriques en beton precontraint a tension immediate, notamment de traverses en beton precontraint Expired - Lifetime EP0579809B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE4203895 1992-02-11
DE4203895A DE4203895C2 (de) 1992-02-11 1992-02-11 Einrichtung zum Herstellen von Fertigbauteilen aus Spannbeton mit sofortigem Verbund, insbesondere von Spannbetonschwellen
PCT/EP1993/000289 WO1993015889A1 (fr) 1992-02-11 1993-02-08 Procede et dispositif de fabrication d'elements prefabriques en beton precontraint a tension immediate, notamment de traverses en beton precontraint

Publications (2)

Publication Number Publication Date
EP0579809A1 EP0579809A1 (fr) 1994-01-26
EP0579809B1 true EP0579809B1 (fr) 1996-03-20

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EP93903923A Expired - Lifetime EP0579809B1 (fr) 1992-02-11 1993-02-08 Procede et dispositif de fabrication d'elements prefabriques en beton precontraint a tension immediate, notamment de traverses en beton precontraint

Country Status (13)

Country Link
US (1) US5439629A (fr)
EP (1) EP0579809B1 (fr)
AT (1) ATE135621T1 (fr)
BR (1) BR9304206A (fr)
CZ (1) CZ282632B6 (fr)
DE (2) DE4203895C2 (fr)
ES (1) ES2086929T3 (fr)
MX (1) MX9300709A (fr)
PL (1) PL300807A1 (fr)
SK (1) SK109093A3 (fr)
TR (1) TR27146A (fr)
TW (1) TW232040B (fr)
WO (1) WO1993015889A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SG93922A1 (en) * 2001-06-07 2003-01-21 Housing & Dev Board Improved pre-stressed concrete formation

Families Citing this family (8)

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US5747074A (en) * 1995-02-02 1998-05-05 Ollendick; David P. Apparatus for the manufacturing of prestressed reinforced concrete railroad ties and the like
US5766648A (en) * 1996-10-21 1998-06-16 Cxt Incorporated Road transportable segmental concrete railroad tie long-line production system
KR100243972B1 (ko) * 1997-12-09 2000-02-01 허규태 침목 제조용 와이어 절단장치(Wire cutting apparatus for manufacturing sleeper)
WO2002065022A1 (fr) † 2001-02-14 2002-08-22 Max Bögl Bauunternehmung GmbH & Co. KG Procede et palette pour produire une piece prefabriquee en beton precise
DE10254973A1 (de) * 2002-11-26 2004-06-09 Plica, Peter, Dr.-Ing. Rahmenschwelle mit variabler Anzahl von Schienenbefestigungen und Verfahren zur Herstellung der Schwelle
DE102004019278B3 (de) * 2004-04-21 2006-02-09 Peter Dr.-Ing. Plica Rahmenschwelle für einen Eisenbahnschotteroberbau
DE202009006555U1 (de) * 2009-05-07 2009-07-16 Rail.One Gmbh Spannbetonschwelle
KR100950715B1 (ko) * 2009-10-26 2010-03-31 (주)대우건설 교량용 프리캐스트 코핑부의 시공 방법

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SG93922A1 (en) * 2001-06-07 2003-01-21 Housing & Dev Board Improved pre-stressed concrete formation

Also Published As

Publication number Publication date
CZ213993A3 (en) 1994-05-18
PL300807A1 (en) 1994-03-21
ATE135621T1 (de) 1996-04-15
DE4203895A1 (de) 1993-08-12
EP0579809A1 (fr) 1994-01-26
SK109093A3 (en) 1994-03-09
US5439629A (en) 1995-08-08
WO1993015889A1 (fr) 1993-08-19
TW232040B (fr) 1994-10-11
ES2086929T3 (es) 1996-07-01
MX9300709A (es) 1993-12-01
TR27146A (tr) 1994-11-09
DE59301937D1 (de) 1996-04-25
CZ282632B6 (cs) 1997-08-13
BR9304206A (pt) 1994-10-11
DE4203895C2 (de) 1996-08-29

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