EP0818287B1 - Formwerkzeug für vorgefertigte betonplatten - Google Patents

Formwerkzeug für vorgefertigte betonplatten Download PDF

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Publication number
EP0818287B1
EP0818287B1 EP96939948A EP96939948A EP0818287B1 EP 0818287 B1 EP0818287 B1 EP 0818287B1 EP 96939948 A EP96939948 A EP 96939948A EP 96939948 A EP96939948 A EP 96939948A EP 0818287 B1 EP0818287 B1 EP 0818287B1
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EP
European Patent Office
Prior art keywords
mold
panels
section
concrete
panel
Prior art date
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Expired - Lifetime
Application number
EP96939948A
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English (en)
French (fr)
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EP0818287A1 (de
Inventor
Vicente Solana Gomez
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Individual
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Individual
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    • 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
    • E04B5/17—Floor structures partly formed in situ
    • E04B5/23—Floor structures partly formed in situ with stiffening ribs or other beam-like formations wholly or partly prefabricated
    • 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
    • B28B7/00—Moulds; Cores; Mandrels
    • B28B7/0064—Moulds characterised by special surfaces for producing a desired surface of a moulded article, e.g. profiled or polished moulding surfaces
    • B28B7/0085—Moulds characterised by special surfaces for producing a desired surface of a moulded article, e.g. profiled or polished moulding surfaces with surfaces for moulding chamfers
    • 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
    • B28B7/00—Moulds; Cores; Mandrels
    • B28B7/10—Moulds with means incorporated therein, or carried thereby, for ejecting or detaching the moulded article
    • 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
    • B28B7/00—Moulds; Cores; Mandrels
    • B28B7/36—Linings or coatings, e.g. removable, absorbent linings, permanent anti-stick coatings; Linings becoming a non-permanent layer of the moulded article
    • 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
    • E04B5/02—Load-carrying floor structures formed substantially of prefabricated units
    • E04B5/04—Load-carrying floor structures formed substantially of prefabricated units with beams or slabs of concrete or other stone-like material, e.g. asbestos cement

Definitions

  • the technique of reinforced or prestressed concrete precast panels with an open section employed as structural floor slab elements in industrialized building systems corresponds basically to the so-called ⁇ -section precast panels formed by two longitudinal ribs and two lateral and one central flanges.
  • the ⁇ -section precast panels technique was first developed for ribbed floor slabs supported on precast beams. Next it was extended to composite floors comprising the precast ribbed slab units and the reinforced concrete plane beams, in which the overall depth of ribbed floor slabs equals that of the concrete plane beams, cast in situ together with reinforced concrete over the panels.
  • the proposed invention refers to the development of reinforced and prestressed concrete precast panel units with an open section, of the so-called inverted channel section type of panels, formed by two longitudinal ribs, or panel beams, and one central flange, taking into account the adecuate fire resistance requirements for floor systems.
  • the problem when using the technique of reinforced concrete precast panels with ⁇ -section is the insufficient width of usual panel ribs to hold the maximum action-effects in the floor ribbed slabs, during the ocurrence of a standard fire in the area limited by the floors, taking into account both the reduction of steel reinforcement and concrete strenghts for the high temperatures reached in the fire and the temperature distribution on these materials in the floor cross section.
  • the desideratum from the fire resistance point of view is to make the precast panels with an inverted channnel open section having a strict rectangular section exterior form, ensuring that the lateral sides of panel ribs are plane and parallel.
  • each beam formed by the pair of ribs of coupled panels is equivalent to a double-width beam.
  • the equivalence means that there are the same boundary conditions for maximum temperatures on the surfaces directly attacked by fire and the same temperature distribution in both the resistent concrete core within the cross section and the steel reinforcement, and therefore the resulting floor elements have mechanical strength analogous to that of double-width beam floor.
  • the molds for casting rectangular section panels referred to in the known patent documents belong to this class of 'molds in pieces'.
  • the lower part of the mold is pushed upwards to take out a single panel, by separating the set formed by this lower part and the precast panel lying on it from the mold's lateral pieces and the formwork bench; for this purpose the material should be only partially hardened, such that the separate panel cannot be removed from the movable lower part of the mold because it is not yet self-supporting.
  • the problem is, therefore, to obtain reinforced or prestressed concrete precast panels with an inverted channel section having a strict rectangular section exterior form, ensuring also that lateral panel sides are plane, in a mold of the class of 'molds in one piece', namely the class of molds in which panels can be taken out without moving any part of the mold and the formwork bench, therefore in a radically different way than in the class of 'molds in pieces'.
  • the procedure that solves this problem consists in placing along the formwork two stiff linear elements of triangular shaped section with a right angle, being the opposed side to this angle plane or near-plane as a cylindric concave form. These elements are placed inside the formwork in a way such that the right angle edge of each element lies exactly on the edge of corner formed by planes molding the lateral and lower sides of panel ribs.
  • this arrangement determines that precast panels can be taken out by straight and vertical pulling from hooks previously anchored in them, avoiding the failure of panels due of friction forces against the formwork.
  • Figure 1 represents how these linear elements are disposed in the rectangular section exterior form which molds the panels in the formwork.
  • the symbol e indicates the direction for extraction of paneles.
  • the symbol 1 represents the linear pieces with a triangular section, and symbols 2 and 3 designate respectively the initial inclined fracture plane and the more elevated potential parallel fracture plane, in which the failure stresses will not be reached.
  • Figure 2 represents the arrangement of two precast panel with the inverted channel section which are jointly placed in the floor which form a double-ribbed slab beam with the alteration made by the linear pieces 1.
  • the symbol f represents the three directions in which the standardised fire attacks the double-ribbed slab beam.
  • Symbols 4 and 5 design respectively the construction joint between panels and the reinforced concrete over the panel in the floor.
  • Symbol 6 corresponds to the cross holes, which are disposed where appropiate to open ways through the slab ribs to avoid accumulation of gases under the floor.
  • the function assigned in this invention to the linear rigid elements 1 in the case of a 'mold in one piece' is only to make possible the extraction of the precast panels having an inverted channel section with a strict rectangular exterior form, in a way that these elements become essential in the procedure. It differs from the functions of placing the linear elements similarly along the formwork in the cases of 'molds in pieces', given in the patent documents US-3767153A, DE-4333080A1 and FR-53476. Along these documents it is only referred to that the lower corners are bevelled to avoid the sharp edges of the precast elements having a tendency to failure when managing them as well as to avoid unpleasant aesthetic results in construction joints of precast panels, but not to take the precast panels out of the mold.
  • stiff linear elements 1 in the case of a 'mold in one piece' is quite different because such elements, placed on the corners inside the formwork, are fixed both on the lower side part as well as on the lateral side part of the mold, whereas in the cases of 'molds in pieces' they are only fixed on one of the mold side pieces, either the lateral or the bottom, in order to be possible to remove the other side piece of the mold for taking the precast panels out of the mold.
  • the panels with an inverted channel rectangular section obtained by this procedure are distinguible from other possible panels made in a mold in which only the adherence force requires to be mobilized, by action of friction on the surfaces of lateral sides of panels, which however are undamaged.
  • Figure 3 represents one realization of a formwork bench for fabrication of precast panels with inverted channel section.
  • the parallel lateral sides of the panels are molded by the formwork elements formed by U-section steel profiles with parallel flanges and the smooth and corrosion protected steel plates covering the inside web faces in the formwork, respectively denoted by symbols 7 and 8.
  • the mold is completed with the steel plates of the same kind, remarked as the symbol 9, which are folded according to the required form for the ribs and flange of panels, and fixed on the stiffness cross plates of the formwork denoted by symbol 10.
  • the symbol 11 designs the longitudinal main beams of the formwork bench frame which rest anchored on metallic supports through elastomeric blocks, represented respectively by symbols 12 and 13.
  • the triangular linear elements 1 are placed on the formwork and the cylindric elements non-adherent to concrete are cross placed inside the formwork and adjusted to the folded steel plate sides, to mold the panel holes 6, opening cross ways through the slab ribs in the floors.
  • the reinforced an prestressed concrete precast panels are fabricated by continuous placing, compacting and vibration and curing of the concrete, and posterior extraction by means of a traveller crane which vertically pulls the panels out from the formwork. These are then stored until the age they reach the adequate strength to be handled and arranged on the building floors.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Ceramic Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Medicines Containing Material From Animals Or Micro-Organisms (AREA)
  • Medicines That Contain Protein Lipid Enzymes And Other Medicines (AREA)
  • Moulds, Cores, Or Mandrels (AREA)
  • Manufacturing Of Tubular Articles Or Embedded Moulded Articles (AREA)
  • Rod-Shaped Construction Members (AREA)
  • Forms Removed On Construction Sites Or Auxiliary Members Thereof (AREA)
  • Building Environments (AREA)

Claims (4)

  1. Eine Hohlform für die Herstellung von Platten aus Stahlbeton oder Spannbeton, die bei einer strikt rechteckigen äusseren Form, im Sektionsschnitt die Form einer nach aussen gewendeten Betonrille aufweisen, mit flachen parallelen Seiten um längs verlaufende Rippen von unterschiedlicher Breite zu formen, und die sich dadurch auszeichnet, dass die Hohlform dem Typ "Form in einem Stück" entspricht, und dass sich zwei streng lineare Elemente, die im Querschnitt ein rechtwinkliges Dreieck bilden im Inneren der Hohlform befinden, so dass die rechtwinklige Kante eines jeden Elements auf der Kante des Winkels liegt zwischen der flachen Querseite und der Rippen-förmigen Unterseite der Hohlform.
  2. Gemäss Patentanspruch 1 zeichnet sich die Hohlform dadurch aus, dass ihre flachen parallelen Seiten, um die längs verlaufenden Rippen mit den flachen parallelen Seiten zu formen, ein U-förmiges Stahlprofil aufweisen, mit parallelen Rändern mit einer glatten, gegen Korrosion geschützten Stahlplatte, die dass Geflecht der Rippen abdeckt, und in der eine Stahlplatte der selben Art so geformt ist, dass sie sich der inneren Form der Hohlform mit ihren verschiedenen Rippenbreiten anpasst.
  3. Den Patentansprüchen 1 und 2 entsprechend zeichnet sich die Hohlform dadurch aus, dass nicht an Beton haftende zylinderförmige Elemente sich im Inneren der Hohlform befinden, um Hohlräume zu schaffen, die die Zwischenräume zwischen den Plattenrippen in den Böden verbinden.
  4. Eine Methode um Platten aus Stahlbeton oder Spannbeton zu produzieren, die bei einer strikt rechteckigen äusseren Form, im Sektionsschnitt die Form einer nach aussen gewendeten Betonrille aufweisen, ist bei Benutzung der Hohlform wie bei Patentanspruch 1 bis 3 definiert; diese Methode besteht aus folgende Schritten: die Hohlform mit Beton auffüllen, und die Platte durch geradliniges und senkrechtes Ziehen aus der Form entnehmen wenn die Tafel gründlich erhärtet ist, so dass die Hohlform als "Form in einem Stück" zurückbleibt.
EP96939948A 1995-12-01 1996-11-27 Formwerkzeug für vorgefertigte betonplatten Expired - Lifetime EP0818287B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
ES9502383 1995-12-01
ES9502383 1995-12-01
PCT/ES1996/000229 WO1997020666A1 (es) 1995-12-01 1996-11-27 Molde para paneles prefabricados de hormigon

Publications (2)

Publication Number Publication Date
EP0818287A1 EP0818287A1 (de) 1998-01-14
EP0818287B1 true EP0818287B1 (de) 2002-10-09

Family

ID=8292378

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96939948A Expired - Lifetime EP0818287B1 (de) 1995-12-01 1996-11-27 Formwerkzeug für vorgefertigte betonplatten

Country Status (5)

Country Link
EP (1) EP0818287B1 (de)
DE (1) DE69624226T2 (de)
ES (1) ES2179955T3 (de)
MX (1) MX9706107A (de)
WO (1) WO1997020666A1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3298216A4 (de) * 2015-05-21 2018-05-16 Lifting Point Pre-Form Pty Limited Modul für eine struktur

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6698150B1 (en) 1998-06-09 2004-03-02 Brentmuir Developments (1993) Limited Concrete panel construction system
DE60041698D1 (de) * 1999-06-09 2009-04-16 Brentmuir Developments 1993 Lt Konstruktionssystem aus betonpaneelen
EP1815087A4 (de) 2004-11-26 2009-05-13 Lorenzo Nick Di Betonplattenkonstruktionssystem und verfahren zur herstellung von platten
US9399867B2 (en) 2009-04-07 2016-07-26 Millwick Acquisition Corp. Concrete panel corner connection
NL2004864C2 (en) * 2010-06-09 2011-12-13 Infra & B V Moulds and methods for forming prefab concrete floor elements and prefab elements.
CN108772944A (zh) * 2018-05-07 2018-11-09 安徽砼宇特构科技有限公司 一种方便固定安装式预制混凝土箱
CN109176862B (zh) * 2018-11-09 2023-09-29 新疆博壹市政工程有限责任公司 带肋预应力预制底板的制作设备结构及制作方法
CN114482375B (zh) * 2022-02-22 2023-07-28 杭州江润科技有限公司 整体接缝式钢筋混凝土叠合板施工方法

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR886179A (fr) * 1942-08-29 1943-10-07 Procédé et dispositif de démoulage
BE756509A (fr) * 1969-09-23 1971-03-01 Haller Hans Plancher constitue d'elements prefabriques juxtaposes et moules, et procede pour leur fabrication
NL148528B (nl) * 1973-02-27 1976-02-16 Kalkman Maschf En Handelsonder Inrichting voor het vervaardigen van een siertegel met een rondgaande facetrand.
DE3109108A1 (de) * 1981-03-11 1982-09-23 Karl Lösch KG, 6722 Lingenfeld "beton-formplatte mit abfasung"
JPH02301404A (ja) * 1989-05-16 1990-12-13 Okagaki Kogyo Kk 鋼製コンクリート型枠の研掃法
ES2076856B1 (es) * 1993-03-03 1998-11-01 Ruiz Miguel Camarero Sistema constructivo de placas sillares prefabricadas.
DE4333080A1 (de) * 1993-09-29 1995-03-30 Ebawe Maschinenbau Gmbh Schalform zur Herstellung von plattenförmigen Betonfertigteilen

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 015, no. 081 (M-1086), 25 February 1991 (25.02.91), & JP 02 301404 A (OKAKAGI KOGYO KK), 13 December 1990 (13.12.90) *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3298216A4 (de) * 2015-05-21 2018-05-16 Lifting Point Pre-Form Pty Limited Modul für eine struktur

Also Published As

Publication number Publication date
WO1997020666A1 (es) 1997-06-12
DE69624226D1 (de) 2002-11-14
DE69624226T2 (de) 2003-10-30
ES2179955T3 (es) 2003-02-01
EP0818287A1 (de) 1998-01-14
MX9706107A (es) 1997-11-29

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