EP0342090A1 - Vorgespanntes Halbfabrikat-Betonelement und Vorrichtung zur Herstellung - Google Patents

Vorgespanntes Halbfabrikat-Betonelement und Vorrichtung zur Herstellung Download PDF

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Publication number
EP0342090A1
EP0342090A1 EP89401211A EP89401211A EP0342090A1 EP 0342090 A1 EP0342090 A1 EP 0342090A1 EP 89401211 A EP89401211 A EP 89401211A EP 89401211 A EP89401211 A EP 89401211A EP 0342090 A1 EP0342090 A1 EP 0342090A1
Authority
EP
European Patent Office
Prior art keywords
concrete
gantry
trellis
prestressing
cables
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.)
Granted
Application number
EP89401211A
Other languages
English (en)
French (fr)
Other versions
EP0342090B1 (de
Inventor
Robert Augier
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.)
Recherche Et D'etudes Techniques Saret SA
Original Assignee
Recherche Et D'etudes Techniques Saret SA
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
Application filed by Recherche Et D'etudes Techniques Saret SA filed Critical Recherche Et D'etudes Techniques Saret SA
Publication of EP0342090A1 publication Critical patent/EP0342090A1/de
Application granted granted Critical
Publication of EP0342090B1 publication Critical patent/EP0342090B1/de
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
    • 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
    • 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
    • B28B23/0068—Embedding lost cores
    • 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
    • B28B23/18—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 for the production of elongated articles
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B5/00—Floors; Floor construction with regard to insulation; Connections specially adapted therefor
    • E04B5/16—Load-carrying floor structures wholly or partly cast or similarly formed in situ
    • E04B5/32—Floor structures wholly cast in situ with or without form units or reinforcements
    • E04B5/36—Floor structures wholly cast in situ with or without form units or reinforcements with form units as part of the floor
    • E04B5/38—Floor structures wholly cast in situ with or without form units or reinforcements with form units as part of the floor with slab-shaped form units acting simultaneously as reinforcement; Form slabs with reinforcements extending laterally outside the element
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C2/00—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels
    • E04C2/02—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials
    • E04C2/04—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials of concrete or other stone-like material; of asbestos cement; of cement and other mineral fibres
    • E04C2/06—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials of concrete or other stone-like material; of asbestos cement; of cement and other mineral fibres reinforced

Definitions

  • the invention relates to a prestressed concrete construction element, of the pre-slab type, as well as an installation for its manufacture.
  • Construction elements are already known, of the pre-slab type, comprising a thin concrete plate or slab in which are pre-stressed cables generally laid in sheet form.
  • Such surface elements suitable for use as lost formwork, in particular for the manufacture of floors.
  • Such a construction element is first placed in its final location on site and then receives a layer of concrete called a "compression table" which, after hardening, forms with this element a resistant slab of greater thickness.
  • the prestressed concrete construction element of the invention is of the type comprising prestressing cables embedded in a thin concrete plate.
  • this element further comprises a wire mesh having a central ply resting on the prestressing cables and embedded in the concrete plate as well as two raised edges extending perpendicular to the ply and parallel to the cables prestressing, these two raised edges projecting from the concrete plate to form waiting reinforcements, at least one lost block of light material being partially embedded in the concrete of the plate in the space between the two raised edges, which makes it possible to form a lighter construction element.
  • partially embedded in the concrete of the plate it is meant to specify that the or each lost block is partially embedded in the concrete of the plate, for example to a depth of the order of a millimeter, this which allows a kind of bonding of the or each block on the concrete plate.
  • the building element comprises two spaced lost blocks, which makes it possible to obtain two lateral locations for lateral concrete ribs in the respective regions of the two raised edges of the trellis and a location central for a central concrete rib, extending parallel to the two lateral locations.
  • the building element comprises, at each of the two ends of the central location, a frame, for example in the form of a sinusoid, which is anchored to the trellis and which is partly embedded in the concrete of the plate to form a waiting reinforcement.
  • This last reinforcement also contributes to the connection of the building element and the compression table which is associated with it.
  • the wire mesh used in the manufacture of the building element comprises longitudinal wires arranged parallel to the prestressing cables and transverse wires welded to the longitudinal wires, the transverse wires being bent at right angles in the vicinity of their two ends, at the level d 'a longitudinal wire, to form the two raised edges of the trellis.
  • the invention in another aspect, relates to an installation for manufacturing such a building element, this installation comprising a prestressing bench having a manufacturing area and means for tensioning prestressing cables.
  • this installation further comprises a folding machine capable of moving along the bench to fold, at right angles, the two longitudinal edges of the welded mesh previously arranged flat on the prestressed cables under tension.
  • the folder comprises a rolling gantry capable of moving over the entire length of the manufacturing area, this gantry comprising a lifting frame capable of being interposed between the prestressing cables and the trellis, two folding flaps carried by the gantry and each pivotally mounted about an axis parallel to the direction of movement of the gantry, between a low position where the flap is disposed under an edge of the trellis and a high position where the edge of the trellis has been raised under the action of the shutter, as well as means of actuating the shutters according to an alternating pivoting movement and means for moving the gantry.
  • this gantry comprising a lifting frame capable of being interposed between the prestressing cables and the trellis, two folding flaps carried by the gantry and each pivotally mounted about an axis parallel to the direction of movement of the gantry, between a low position where the flap is disposed under an edge of the trellis and a high position where the edge of the trellis has been raised under the
  • the building element 10, of the pre-slab type, shown in FIGS. 1 to 3 comprises a concrete plate 12 in which are embedded a multiplicity of prestressing cables 14-1,14-2, ..., 14-n, arranged in sheet form, the cables being parallel to each other and to the direction of prestressing.
  • the plate 12 can have a running width of 1.20 m or more, a thickness of 4 to 5 cm and a length of up to 6 m.
  • the element 10 further comprises a wire mesh 16 which best appears in FIG. 5, comprising longitudinal wires 18-1,18-2,18-3,18-4 and 18-5 on which transverse wires are welded 20-1,20-2,20-3, ..., 20-n.
  • the wire mesh 16 is disposed on the prestressing cables 14-1 to n, before pouring the concrete intended to form the plate 12, this mesh being arranged so that the longitudinal wires 18-1 to 18-5 are parallel to the prestressing cables.
  • the two lateral edges of the trellis 16 are bent at right angles to the longitudinal wires 18-2 and 18-4 to form two raised edges 21-1 and 21-2 which thus connect to a central ply 22, the latter being formed by the central part of the transverse wires 20-1,20-2, ...
  • the central ply 22 is embedded in the concrete, while the raised edges 21-1 and 21-2 protrude from the concrete upwards, extending parallel to the direction of prestressing and perpendicular to the central ply 22 of the trellis 16.
  • the plate 12 comprises, in the example, two chamfers 24-1 and 24-2 which are connected respectively to two vertical edges 26-1 and 26-2 ( Figures 1,2 and 5). These edges and these chamfers are obtained by edge rules arranged on a manufacturing bench, in a manner known per se.
  • the plate is further limited by two vertical end edges 28 and 30 extending perpendicular to the prestressing cables, and by a lower surface 32 and an upper surface 34.
  • two lateral locations 44-1 and 44-2 are thus formed in the respective regions of the edges 20-1 and 20-2 and a central location 46 s' extending parallel to the lateral locations 44-1 and 44-2, in the limited space between the blocks 36 and 38.
  • two frames 48 and 50 are provided respectively, in the example in the form of a sinusoid, which are anchored to the trellis 16 and are thus partially embedded in the concrete to form waiting reinforcements.
  • the frame 48 comprises sinusoids which pass respectively under the transverse son 20-1,20-2, etc., of the trellis 16 and are tied to the latter. It is the same for the frame 50.
  • the building element 10 is intended to be used as lost formwork to form in particular a floor.
  • concrete is then poured onto this element to form a compression table which comes to bind to the element 10 thanks to the waiting reinforcements formed by the raised edges 21-1 and 21- 2 of the trellis and by the end frames 48 and 50. Due to the presence of the blocks 36 and 38, a lightened composite element of greater thickness is thus obtained.
  • the lateral locations 44-1 and 44-2 and the central location 46 are then filled with the concrete of the compression table to form concrete ribs.
  • the raised edges 21-1 and 21-2 resist the shearing force after pouring the compression table, in particular at the resumption of concreting pre-slab-compression table, and this over the entire length of the element of construction.
  • the frames 48 and 50 extend over a length corresponding to the calculation of the shearing force (approximately 40 cm for a pre-slab of 4.50 m in length, stressed under house loads).
  • the frames 48 and 50 can also be used for handling the building element until it is used on site.
  • the manufacturing of a construction element 10 according to the invention can be carried out by means of a prestressing bench installation, as described for example in French patent application n ° 85-04947 filed on April 1, 1985 in the name of the plaintiff.
  • Such an installation essentially comprises a horizontal manufacturing area, extending over a width of approximately 1.50 m and over a length of several tens of meters, for example 100 m or more .
  • Such an installation also comprises means suitable for placing and tensioning prestressing cables above the manufacturing area.
  • this installation includes means for distributing and vibrating concrete on the manufacturing area, the prestressing cables being tensioned above this area.
  • the process then consists of unrolling and stretching the strip along the bench on the civil engineering so as to obtain a perfect surface condition.
  • the strip 52 consists of a metal strip, presented in the form of a roll 54, having a width corresponding to that of the bench and a thickness of the order of 2 to 3 mm, for example.
  • This strip is placed on the bench 56 and one end 58 is folded and welded of the strip on one end 60 of the bench.
  • the strip is then unwound over the entire length of the bench ( Figure 6).
  • the strip is then cut off and its other end 62 (FIG.
  • the invention provides a folder 70 which will now be described with reference to FIGS. 9 to 11.
  • the folding machine 70 is intended to move along the manufacturing area to fold at a right angle the two edges of the trellis 16 previously laid flat and stretched over the prestressed cables tensioned, so as to form the two raised edges of the trellis.
  • the folder 70 comprises a gantry 72 provided with four wheels 74 capable of moving on two rails 76 arranged on either side of the manufacturing area and over the entire length of the latter.
  • the gantry 72 comprises two cross members 80 on which depend two longitudinal beams 82 spaced apart from each other, each of the two beams 82 supporting two wheels 74.
  • each of the beams 82 depend a multiplicity of arms 84 which extend horizontally towards the inside of the gantry and which carry pivots 86 aligned in a horizontal direction parallel to the direction of movement of the gantry on the rails 76.
  • These pivots 86 serve on the one hand to the removable mounting of a lifting frame 88 and on the other hand to pivot with two folding flaps 90.
  • the chassis 88 comprises a multiplicity of crosspieces 92 connected together by longitudinal elements 94, each crosspiece 92 carrying, at each of its ends, a pin 96 suitable for being engaged in a pivot 86.
  • the flaps 90 which each have a shape twisted or veiled, also have a multiplicity of pins 98 suitable for cooperating with the pivots 86.
  • a form of support 102 comprising a multiplicity of longitudinal bars 104 supported by two cross members 106, these two cross members being connected, at their two ends, to two supports 108 to wedge-shaped section extending parallel to the direction of travel of the gantry.
  • Each of the flaps 90 can be subjected to an alternating pivoting movement by means of a jack 110 whose rod 112 is articulated on the central part of a lever 114.
  • One of the ends of the lever 114 is articulated at 116 on a beam 82 and its opposite end carries a sphere 118 suitable for engaging in a gutter 120 formed on the external surface 122 of the corresponding flap 90.
  • the flap 90 When the rod 112 of the jack is retracted, the flap 90 is in a low position and, when this rod is deployed, the flap gradually pivots to approach the corresponding support 108 and raise an edge of the trellis held captive between the flap and the corresponding support.
  • a rod 126 carrying a rack 128 which cooperates with a freewheel pinion 130 of one of the wheels 74. Consequently, each time that the rod of the jack is deployed, the corresponding component swivels from the low position to the high position and the gantry also moves by a corresponding step. When the cylinder rod is retracted, the flap returns to its low position but the gantry does not move due to the freewheel drive.
  • two rollers 132 are provided which are suitable for respectively guiding the longitudinal wires 18-2 and 18-4 of the welded mesh, as well as two body washers 134 suitable for promoting the lifting of the mesh.
  • the gantry also supports a generator of pressurized fluid 136 supplying the two jacks 110.
  • the installation as shown, is used as follows.
  • each support 108 has a support surface 138 which is slightly inclined to the vertical.
  • the flap 90 ensures the folding of the corresponding edge, for example 21-1 ( Figure 10), to a position P (shown in dotted lines in Figure 10) which is located beyond the vertical.
  • the raised edge then returns to a substantially vertical position, that is to say at right angles to the central ply of the lattice.
  • there is a clearance d between the folded edge of the chassis and the flap which then makes it possible to unhook the chassis 88 and consequently to release the folder from the folded welded mesh. After this operation, the chassis is then removed laterally from below the welded mesh.
  • the welded mesh is folded over its edges while being correctly centered relative to the manufacturing area. It then suffices to have the reinforcements 48 and 50 in the form of a sinusoid and to proceed with the pouring of the concrete, as described for example in the aforementioned French patent application No. 85-04947.
  • the blocks 36 and 38 are joined to the concrete plate thus formed and the construction element obtained can be transported to its site of use.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Manufacturing Of Tubular Articles Or Embedded Moulded Articles (AREA)
  • Bridges Or Land Bridges (AREA)
EP19890401211 1988-05-09 1989-04-27 Vorgespanntes Halbfabrikat-Betonelement und Vorrichtung zur Herstellung Expired - Lifetime EP0342090B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8806234A FR2631056B1 (fr) 1988-05-09 1988-05-09 Element de construction en beton precontraint, du type predalle, et installation pour sa fabrication
FR8806234 1988-05-09

Publications (2)

Publication Number Publication Date
EP0342090A1 true EP0342090A1 (de) 1989-11-15
EP0342090B1 EP0342090B1 (de) 1992-02-19

Family

ID=9366135

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19890401211 Expired - Lifetime EP0342090B1 (de) 1988-05-09 1989-04-27 Vorgespanntes Halbfabrikat-Betonelement und Vorrichtung zur Herstellung

Country Status (5)

Country Link
EP (1) EP0342090B1 (de)
DE (1) DE68900829D1 (de)
ES (1) ES2029379T3 (de)
FR (1) FR2631056B1 (de)
PT (1) PT90472B (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997038179A1 (fr) * 1996-04-05 1997-10-16 Marc Louis Structure, panneau pour une telle structure et sa fabrication
EP1411181A1 (de) * 2002-10-17 2004-04-21 Maurizio Princivalle Leichte und isolierende Schalungsplatten für Decken
NL2008542C2 (nl) * 2012-03-27 2013-09-30 Barhold B V Vloerelement voorzien van voorspanmiddelen.

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2299283B1 (es) * 2004-08-27 2009-04-01 Rubiera, S.A. Forjados Y Cubiertas Forjados para la construccion de edificios.

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB748104A (en) * 1953-11-17 1956-04-18 Pre Stressed Concrete Company Improvements relating to building structures
DE1683943A1 (de) * 1951-01-28 1971-03-04 Rheinquell Ets Mittels Gleitfertiger hergestelltes Betonfertigteil,vorzugsweise Spannbetonplatte
DE2436706A1 (de) * 1974-07-30 1976-02-12 Otto Keller Beton Und Ziegelwe Grossflaechige spannbetondecke und verfahren zu deren herstellung
DE2445785A1 (de) * 1974-09-25 1976-04-15 Josef Freund Plattenfoermiges bauelement und wand aus einer anzahl solcher bauelemente
GB2085502A (en) * 1980-01-22 1982-04-28 Transfloors Pty Ltd Building units for forming permanent formwork

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1683943A1 (de) * 1951-01-28 1971-03-04 Rheinquell Ets Mittels Gleitfertiger hergestelltes Betonfertigteil,vorzugsweise Spannbetonplatte
GB748104A (en) * 1953-11-17 1956-04-18 Pre Stressed Concrete Company Improvements relating to building structures
DE2436706A1 (de) * 1974-07-30 1976-02-12 Otto Keller Beton Und Ziegelwe Grossflaechige spannbetondecke und verfahren zu deren herstellung
DE2445785A1 (de) * 1974-09-25 1976-04-15 Josef Freund Plattenfoermiges bauelement und wand aus einer anzahl solcher bauelemente
GB2085502A (en) * 1980-01-22 1982-04-28 Transfloors Pty Ltd Building units for forming permanent formwork

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997038179A1 (fr) * 1996-04-05 1997-10-16 Marc Louis Structure, panneau pour une telle structure et sa fabrication
EP1411181A1 (de) * 2002-10-17 2004-04-21 Maurizio Princivalle Leichte und isolierende Schalungsplatten für Decken
NL2008542C2 (nl) * 2012-03-27 2013-09-30 Barhold B V Vloerelement voorzien van voorspanmiddelen.

Also Published As

Publication number Publication date
FR2631056B1 (fr) 1992-05-07
PT90472A (pt) 1989-11-30
ES2029379T3 (es) 1992-08-01
EP0342090B1 (de) 1992-02-19
FR2631056A1 (fr) 1989-11-10
PT90472B (pt) 1994-04-29
DE68900829D1 (de) 1992-03-26

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