WO2016135374A1 - Method for constructing a prefabricated concrete element - Google Patents

Method for constructing a prefabricated concrete element Download PDF

Info

Publication number
WO2016135374A1
WO2016135374A1 PCT/FI2016/050069 FI2016050069W WO2016135374A1 WO 2016135374 A1 WO2016135374 A1 WO 2016135374A1 FI 2016050069 W FI2016050069 W FI 2016050069W WO 2016135374 A1 WO2016135374 A1 WO 2016135374A1
Authority
WO
WIPO (PCT)
Prior art keywords
elongated
reinforcement
web
bent
mold
Prior art date
Application number
PCT/FI2016/050069
Other languages
French (fr)
Inventor
Arpad Toth
Original Assignee
Peikko Group Oy
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 Peikko Group Oy filed Critical Peikko Group Oy
Publication of WO2016135374A1 publication Critical patent/WO2016135374A1/en

Links

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
    • 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
    • B28B11/00—Apparatus or processes for treating or working the shaped or preshaped articles
    • B28B11/003—Apparatus or processes for treating or working the shaped or preshaped articles the shaping of preshaped articles, e.g. by bending
    • 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
    • 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
    • B28B7/0091—Transformable moulds allowing the change of shape of an initial moulded preform by preform deformation or the change of its size by moulding on the preform
    • 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
    • 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
    • E04C2/44—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by the purpose
    • E04C2/50—Self-supporting slabs specially adapted for making floors ceilings, or roofs, e.g. able to be loaded
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
    • E04C5/01—Reinforcing elements of metal, e.g. with non-structural coatings
    • E04C5/06—Reinforcing elements of metal, e.g. with non-structural coatings of high bending resistance, i.e. of essentially three-dimensional extent, e.g. lattice girders
    • E04C5/065—Light-weight girders, e.g. with precast parts
    • E04C5/0653—Light-weight girders, e.g. with precast parts with precast parts

Definitions

  • the invention relates to a method for constructing a prefabricated concrete element as defined in the preamble of independent claim 1 .
  • the invention relates to prefabricated concrete elements of so-called filigree type.
  • Publication WO 92/12303 presents a filigree element and presents that it is also desirable to obtain an upward arch of the element during production in order to compensate for downward deflections brought about by the actual weight of the element and load.
  • the advantage in using an upward arch is that the dimensions of the element can be dictated by strength, instead of considering deflection.
  • An upward arch is desirable when the topside of the element is used as a floor, especially at the walls where cupboards lean outward from the wall when the element is downward deflect by weight.
  • the underside of the element, building the ceiling can be allowed to lean. When used as a bottom joist the shape of the underside does not matter.
  • the supporting beam is given such a shape at production that it will become straight when subject to load. Similar circumstances are applicable when outer walls are required to take up earth pressure. A slight curve to the outside wall is irrelevant, but it is vital that the inside wall is straight since it will be visible.
  • filigree concrete elements having an upward arch from as presented above is that the filigree concrete elements need additional supporting for example during transport in order to maintain the upward arch form.
  • the object of the invention is to provide a method for constructing a prefabricated concrete element, which prefabricated concrete element has a reduced need for additional supporting to maintain said upward.
  • the method for constructing a prefabricated concrete element of the invention is characterized by the definitions of independent claim 1 .
  • Preferred embodiments of the method for constructing a prefabricated concrete element are defined in the dependent claims.
  • the invention is based on using a locking member that is fastened to the prefabricated concrete element and that supports the prefabricated concrete element to maintain the upward arch form i.e a precambered state of the prefabricated concrete element.
  • Figure 1 shows a mold for use in the method
  • Figure 2 shows an elongated reinforcement beam that is used in the first embodiment of the method shown in figures 3 to 12,
  • Figures 3 to 12 shows production steps of a first embodiment of the method
  • Figure 13 shows an elongated reinforcement beam that is used in the second embodiment of the method shown in figures 14 to 23,
  • Figures 14 to 23 shows production steps of a second embodiment of the method
  • Figure 24 shows an elongated reinforcement beam that is used in the third embodiment of the method shown in figures 25 to 34,
  • Figures 25 to 34 shows production steps of a third embodiment of the method
  • Figure 35 shows an elongated reinforcement beam that is used in the fourth embodiment of the method shown in figures 36 to 45, and
  • Figures 36 to 45 shows production steps of a fourth embodiment of the method.
  • the method comprises a first providing step for providing a mold 1 , as is shown in figure 1 , having a mold space 2 with an open top 3.
  • the mold space 2 is limited by a first end side 4, a second end side 5 at the opposite and of the mold space 2 with respect to the first end side 4, a first lateral side 6 between the first end side 4 and the second end side 5, a second lateral side 7 between the first end side 4 and the second end side 5, and a planar bottom 8.
  • the first end side 4 and the second end side 5 are planar and essentially parallel
  • first lateral side 6 and the second lateral side 7 are planar and essentially parallel
  • the planar bottom 8 of the mold 1 extend essentially perpendicularly with respect to the first lateral side 6.
  • the method comprises a second providing step for providing at least one elongated reinforcement beam 9, as is shown in figures 2, 13, 24 and 35, comprising an elongated bottom flange 10 from which a plurality of web elements 1 1 projects so that each web element 1 1 has an end attached to the elongated bottom flange 10 and a free end 33.
  • the method comprises an arranging step, as is shown in figures 9, 19, 31 and 41 , for arranging said at least one elongated reinforcement beam 9 in the mold space 2 so that the elongated bottom flange 10 of said at least one elongated reinforcement beam 9 is in the mold space 2 and so that the elongated bottom flange 10 of said at least one elongated reinforcement beam 9 is essentially parallel with the first lateral side 6 of the mold 1 and the second lateral side 7 of the mold 1 and essentially parallel with the planar bottom 8 of the mold 1 .
  • the method comprises a pouring step for pouring concrete 27 into the mold space 2 so that the elongated bottom flange 10 of said at least one elongated reinforcement beam 9 becomes embedded in concrete 27 in the mold 1 and so that said at least one elongated reinforcement beam 9 at least partly projects out of the concrete 27 in the mold 1 to obtain a concrete plate 12 having at least one elongated reinforcement beam 9 party embedded in the concrete plate 12 and partly projecting out of a top face 13 of the concrete plate 12 and having a bottom face 14 unpenetrated by said at least one elongated reinforcement beam 9 and having a first end face 15 and an opposite second end face 16 that is parallel with the first end face 15 and having a first lateral side face 17 and an opposite second lateral side face 18 that is parallel with the first lateral side face 17, as is shown in figures 9, 20, 31 and 42.
  • the pouring step is followed by a precambering step for bending the concrete plate 12 about an axis that is perpendicular to said first lateral side face 17 and perpendicular to said second lateral side face 18 and that is parallel with said first end face 15 and said second end face 16 so that also said at least one elongated reinforcement beam 9 is bent into a bent state for obtaining a precambered prefabricated concrete element 19 having at least one bent elongated reinforcement beam 20, as is shown in figures 5, 1 1 , 17 and 23.
  • the precambering step is followed by a locking step for locking said at least one bent elongated reinforcement beam 20 into said bent state by means of a locking member 31 that is fastened to said at least one bent elongated reinforcement beam 20 outside the concrete plate 12, as is shown in figures 1 1 , 22, 33 and 44.
  • the distance between the free ends 33 of the web elements 1 1 of the elongated reinforcement beam 9 increases in the precambering step when the elongated reinforcement beam 9 is bent into a bent state to obtain a precambered elongated reinforcement beam.
  • the precambered elongated reinforcement beam is locked into said bent state so that the increased distance between the free ends 33 of the web elements 1 1 is maintained.
  • the second providing step of the method may comprise, as in the first embodiment shown in figures 3 to 12, in the second embodiment shown in figures 14 to 23, and in the fourth embodiment shown in figures 36 to 45, providing an elongated reinforcement beam 9 having an elongated bottom flange 10 comprising a first elongated reinforcement bar 21 and a second elongated reinforcement bar 22 attached to the first elongated reinforcement bar 21 by means of traverse reinforcement bar elements (not shown in the figures) so that the first elongated reinforcement bar 21 and the a second elongated reinforcement bar 22 are parallel and spaced from each other, a first elongated web beam 23 comprising a reinforcement bar bent into zigzag form and having a side attached to the first parallel reinforcement bar so that the first elongated web beam 23 form a plurality of v-shaped elements each forming one web element 1 1 of said plurality of web elements 1 1 of said at least one elongated reinforcement beam 9, and a second elongated web beam 24 comprising a reinforcement bar bent into zigzag form
  • the second providing step of the method comprises providing at least one elongated reinforcement beam 9 where an elongated plastically deformable open-sided channel element 25, which is made of plastically deformable material, such as of cold formed steel sheet material, or which is made plastically deformable for example by means of perforations, is attached to the first elongated web beam 23 and to the second elongated web beam 24 between the first elongated web beam 23 and the second elongated web beam 24 so that an open side 26 of the elongated open-sided channel element 25 is turned away from the elongated bottom flange 10 of said least one elongated reinforcement beam 9.
  • an elongated plastically deformable open-sided channel element 25 which is made of plastically deformable material, such as of cold formed steel sheet material, or which is made plastically deformable for example by means of perforations
  • the pouring step of the fourth embodiment of the method comprises pouring concrete 27 the mold 1 so that the elongated plastically deformable open-sided channel element 25 of said at least one elongated reinforcement beam 9 is located outside the concrete 27.
  • the precambering step of the fourth embodiment of the method comprises plastically deforming the elongated plastically deformable channel element 25 by bending the mold 1 so that the elongated open-sided channel element 25 is bent and stretched to obtain a bent and stretched elongated plastically deformed open-sided channel element 32.
  • the locking step of the fourth embodiment of the method comprises using concrete 27 and at least one elongated reinforcement bar 28 as a locking member 31 by filling the bent and stretched elongated plastically deformed open-sided channel element 32 with concrete 27 and arranging said at least one elongated reinforcement bar 28 in the bent and stretched elongated plastically deformed open-sided channel element 32.
  • the second providing step of the fourth embodiment of the method may comprise providing at least one elongated reinforcement beam 9, where the elongated open-sided channel element 25 is attached element between the free ends 33 of the v-shaped elements of the first elongated web beam 23 and the free ends 33 of the v-shaped elements of the second elongated web beam 24 of said at least one elongated reinforcement beam 9.
  • the locking step includes attaching a locking member 31 in the form of an elongated reinforcement bar 28 to the first elongated web beam 23 and to the second elongated web beam 24 between the first elongated web beam 23 and the second elongated web beam 24 for locking said elongated reinforcement beam 9 into bent state.
  • the locking step of the second embodiment of the method may comprise attaching the elongated reinforcement bar 28 in the locking step between the free ends 33 of the v- shaped elements of the first elongated web beam 23 and the free ends 33 of the v-shaped elements of the second elongated web beam 24.
  • the locking step of the second embodiment of the method may comprise attaching the elongated reinforcement bar 28 to the first elongated web beam 23 and to the second elongated web beam 24 by welding.
  • the locking step includes attaching a locking member 31 in the form of an elongated plate element 29 to the first elongated web beam 23 and to the second elongated web beam 24 between the first elongated web beam 23 and the second elongated web beam 24 for locking said elongated reinforcement beam 9 into bent state.
  • the locking step of the first embodiment of the method may comprise attaching the elongated plate element 29 in the locking step between the free ends 33 of the v-shaped elements of the first elongated web beam 23 and the free ends 33 of the v-shaped elements of the second elongated web beam 24.
  • the locking step of the first embodiment of the method may comprise attaching the elongated plate element 29 to the first elongated web beam 23 and to the second elongated web beam 24 by welding.
  • the second providing step of the method comprises providing in the second providing step an elongated reinforcement beam 9 having an elongated bottom flange 10 comprising a first elongated reinforcement bar 21 and a second elongated reinforcement bar 22 attached to the first elongated reinforcement bar 21 by means of traverse reinforcement bar elements so that the first elongated reinforcement bar 21 and the a second elongated reinforcement bar 22 are parallel and spaced from each other, and a plurality of v-shaped elements made of sheet material each having a first end fastened to the first elongated reinforcement bar 21 and a second end fastened to the second elongated reinforcement bar 22 and having a free end 33 between said first end and said second end and each v-shaped element of said plurality of v-shaped elements forming one web element 1 1 of said plurality of web elements 1 1 of said at least one elongated reinforcement beam 9.
  • the locking step includes attaching an elongated reinforcement bar 28 to the free end 33 of the plurality of v-shaped elements for locking said elongated reinforcement beam 9 into bent state.
  • the third embodiment of the method may comprise attaching the elongated reinforcement bar 28 to the free end 33 of the plurality of v-shaped elements by pressing the free end 33 of the plurality of v-shaped elements against the elongated reinforcement bar 28 by means of an external pressing means.
  • the method may comprise arranging a reinforcement net 30 in the mold 1 prior the pouring step.
  • the reinforcement net 30 is preferably, but not necessarily, arranged in the mold 1 so that the bottom flange of said at least one elongated reinforcement beam 9 is located between the bottom of the mold 1 and the reinforcement net 30.

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Structural Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Civil Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Rod-Shaped Construction Members (AREA)
  • Reinforcement Elements For Buildings (AREA)

Abstract

The invention relates to a method for constructing a prefabricated concrete element. The method comprises an arranging step for arranging at least one elongated reinforcement beam (9) a mold (1) and a pouring step for pouring concrete (27) into the mold (1) so that said at least one elongated reinforcement beam (9) projects out of the concrete (27) in the mold to obtain a concrete plate (12). The pouring step is followed by a precambering step for bending the concrete plate (12) so that also said at least one elongated reinforcement beam (9) is bent to form a bent elongated reinforcement beam (20) and a locking step for locking said at least one bent elongated reinforcement beam (20) into said bent state by means of a locking member (31) that is fastened to said at least one bent elongated reinforcement beam (20) outside the concrete plate (12).

Description

METHOD FOR CONSTRUCTING A PREFABRICATED CONCRETE ELEMENT
FIELD OF THE INVENTION
The invention relates to a method for constructing a prefabricated concrete element as defined in the preamble of independent claim 1 .
The invention relates to prefabricated concrete elements of so-called filigree type.
Publication WO 92/12303 presents a filigree element and presents that it is also desirable to obtain an upward arch of the element during production in order to compensate for downward deflections brought about by the actual weight of the element and load. The advantage in using an upward arch is that the dimensions of the element can be dictated by strength, instead of considering deflection. An upward arch is desirable when the topside of the element is used as a floor, especially at the walls where cupboards lean outward from the wall when the element is downward deflect by weight. The underside of the element, building the ceiling, can be allowed to lean. When used as a bottom joist the shape of the underside does not matter. If the element is turned so that the slab is down and the supporting beam is up, it is sufficient to bend the supporting beam to obtain an upward arch. The supporting beam is given such a shape at production that it will become straight when subject to load. Similar circumstances are applicable when outer walls are required to take up earth pressure. A slight curve to the outside wall is irrelevant, but it is vital that the inside wall is straight since it will be visible.
A disadvantage with filigree concrete elements having an upward arch from as presented above is that the filigree concrete elements need additional supporting for example during transport in order to maintain the upward arch form.
OBJECTIVE OF THE INVENTION
The object of the invention is to provide a method for constructing a prefabricated concrete element, which prefabricated concrete element has a reduced need for additional supporting to maintain said upward.
SHORT DESCRIPTION OF THE INVENTION
The method for constructing a prefabricated concrete element of the invention is characterized by the definitions of independent claim 1 .
Preferred embodiments of the method for constructing a prefabricated concrete element are defined in the dependent claims. The invention is based on using a locking member that is fastened to the prefabricated concrete element and that supports the prefabricated concrete element to maintain the upward arch form i.e a precambered state of the prefabricated concrete element.
BRIEF DESCRIPTION OF THE DRAWINGS
In the following the invention will described in more detail by referring to the figure, which
Figure 1 shows a mold for use in the method,
Figure 2 shows an elongated reinforcement beam that is used in the first embodiment of the method shown in figures 3 to 12,
Figures 3 to 12 shows production steps of a first embodiment of the method,
Figure 13 shows an elongated reinforcement beam that is used in the second embodiment of the method shown in figures 14 to 23,
Figures 14 to 23 shows production steps of a second embodiment of the method,
Figure 24 shows an elongated reinforcement beam that is used in the third embodiment of the method shown in figures 25 to 34,
Figures 25 to 34 shows production steps of a third embodiment of the method,
Figure 35 shows an elongated reinforcement beam that is used in the fourth embodiment of the method shown in figures 36 to 45, and
Figures 36 to 45 shows production steps of a fourth embodiment of the method.
DETAILED DESCRIPTION OF THE INVENTION
In the following the method for constructing a prefabricated concrete element and some embodiments and variants of the method will be described in greater detail.
The method comprises a first providing step for providing a mold 1 , as is shown in figure 1 , having a mold space 2 with an open top 3. The mold space 2 is limited by a first end side 4, a second end side 5 at the opposite and of the mold space 2 with respect to the first end side 4, a first lateral side 6 between the first end side 4 and the second end side 5, a second lateral side 7 between the first end side 4 and the second end side 5, and a planar bottom 8. The first end side 4 and the second end side 5 are planar and essentially parallel, first lateral side 6 and the second lateral side 7 are planar and essentially parallel, and the planar bottom 8 of the mold 1 extend essentially perpendicularly with respect to the first lateral side 6. The method comprises a second providing step for providing at least one elongated reinforcement beam 9, as is shown in figures 2, 13, 24 and 35, comprising an elongated bottom flange 10 from which a plurality of web elements 1 1 projects so that each web element 1 1 has an end attached to the elongated bottom flange 10 and a free end 33. The method comprises an arranging step, as is shown in figures 9, 19, 31 and 41 , for arranging said at least one elongated reinforcement beam 9 in the mold space 2 so that the elongated bottom flange 10 of said at least one elongated reinforcement beam 9 is in the mold space 2 and so that the elongated bottom flange 10 of said at least one elongated reinforcement beam 9 is essentially parallel with the first lateral side 6 of the mold 1 and the second lateral side 7 of the mold 1 and essentially parallel with the planar bottom 8 of the mold 1 .
The method comprises a pouring step for pouring concrete 27 into the mold space 2 so that the elongated bottom flange 10 of said at least one elongated reinforcement beam 9 becomes embedded in concrete 27 in the mold 1 and so that said at least one elongated reinforcement beam 9 at least partly projects out of the concrete 27 in the mold 1 to obtain a concrete plate 12 having at least one elongated reinforcement beam 9 party embedded in the concrete plate 12 and partly projecting out of a top face 13 of the concrete plate 12 and having a bottom face 14 unpenetrated by said at least one elongated reinforcement beam 9 and having a first end face 15 and an opposite second end face 16 that is parallel with the first end face 15 and having a first lateral side face 17 and an opposite second lateral side face 18 that is parallel with the first lateral side face 17, as is shown in figures 9, 20, 31 and 42.
The pouring step is followed by a precambering step for bending the concrete plate 12 about an axis that is perpendicular to said first lateral side face 17 and perpendicular to said second lateral side face 18 and that is parallel with said first end face 15 and said second end face 16 so that also said at least one elongated reinforcement beam 9 is bent into a bent state for obtaining a precambered prefabricated concrete element 19 having at least one bent elongated reinforcement beam 20, as is shown in figures 5, 1 1 , 17 and 23.
The precambering step is followed by a locking step for locking said at least one bent elongated reinforcement beam 20 into said bent state by means of a locking member 31 that is fastened to said at least one bent elongated reinforcement beam 20 outside the concrete plate 12, as is shown in figures 1 1 , 22, 33 and 44.
In the first embodiment shown in figures 3 to 12, the second embodiment shown in figures 14 to 23, and the third embodiment shown in figures 25 to 34, the distance between the free ends 33 of the web elements 1 1 of the elongated reinforcement beam 9 increases in the precambering step when the elongated reinforcement beam 9 is bent into a bent state to obtain a precambered elongated reinforcement beam. By means of the locking member 31 , the precambered elongated reinforcement beam is locked into said bent state so that the increased distance between the free ends 33 of the web elements 1 1 is maintained.
The second providing step of the method may comprise, as in the first embodiment shown in figures 3 to 12, in the second embodiment shown in figures 14 to 23, and in the fourth embodiment shown in figures 36 to 45, providing an elongated reinforcement beam 9 having an elongated bottom flange 10 comprising a first elongated reinforcement bar 21 and a second elongated reinforcement bar 22 attached to the first elongated reinforcement bar 21 by means of traverse reinforcement bar elements (not shown in the figures) so that the first elongated reinforcement bar 21 and the a second elongated reinforcement bar 22 are parallel and spaced from each other, a first elongated web beam 23 comprising a reinforcement bar bent into zigzag form and having a side attached to the first parallel reinforcement bar so that the first elongated web beam 23 form a plurality of v-shaped elements each forming one web element 1 1 of said plurality of web elements 1 1 of said at least one elongated reinforcement beam 9, and a second elongated web beam 24 comprising a reinforcement bar bent into zigzag form and having a side attached to the second parallel reinforcement bar so that the second elongated web beam 24 a plurality of v-shaped elements each forming one web element 1 1 of said plurality of web elements
1 1 of said at least one elongated reinforcement beam 9.
In the fourth embodiment of the method shown in figures 36 to 45, the second providing step of the method comprises providing at least one elongated reinforcement beam 9 where an elongated plastically deformable open-sided channel element 25, which is made of plastically deformable material, such as of cold formed steel sheet material, or which is made plastically deformable for example by means of perforations, is attached to the first elongated web beam 23 and to the second elongated web beam 24 between the first elongated web beam 23 and the second elongated web beam 24 so that an open side 26 of the elongated open-sided channel element 25 is turned away from the elongated bottom flange 10 of said least one elongated reinforcement beam 9.
The pouring step of the fourth embodiment of the method comprises pouring concrete 27 the mold 1 so that the elongated plastically deformable open-sided channel element 25 of said at least one elongated reinforcement beam 9 is located outside the concrete 27.
The precambering step of the fourth embodiment of the method comprises plastically deforming the elongated plastically deformable channel element 25 by bending the mold 1 so that the elongated open-sided channel element 25 is bent and stretched to obtain a bent and stretched elongated plastically deformed open-sided channel element 32.
The locking step of the fourth embodiment of the method comprises using concrete 27 and at least one elongated reinforcement bar 28 as a locking member 31 by filling the bent and stretched elongated plastically deformed open-sided channel element 32 with concrete 27 and arranging said at least one elongated reinforcement bar 28 in the bent and stretched elongated plastically deformed open-sided channel element 32.
The second providing step of the fourth embodiment of the method may comprise providing at least one elongated reinforcement beam 9, where the elongated open-sided channel element 25 is attached element between the free ends 33 of the v-shaped elements of the first elongated web beam 23 and the free ends 33 of the v-shaped elements of the second elongated web beam 24 of said at least one elongated reinforcement beam 9.
In the second embodiment of the method shown in figures 14 to 23, the locking step includes attaching a locking member 31 in the form of an elongated reinforcement bar 28 to the first elongated web beam 23 and to the second elongated web beam 24 between the first elongated web beam 23 and the second elongated web beam 24 for locking said elongated reinforcement beam 9 into bent state.
The locking step of the second embodiment of the method may comprise attaching the elongated reinforcement bar 28 in the locking step between the free ends 33 of the v- shaped elements of the first elongated web beam 23 and the free ends 33 of the v-shaped elements of the second elongated web beam 24.
The locking step of the second embodiment of the method may comprise attaching the elongated reinforcement bar 28 to the first elongated web beam 23 and to the second elongated web beam 24 by welding.
In the first embodiment of the method shown in figures 3 to 13 the locking step includes attaching a locking member 31 in the form of an elongated plate element 29 to the first elongated web beam 23 and to the second elongated web beam 24 between the first elongated web beam 23 and the second elongated web beam 24 for locking said elongated reinforcement beam 9 into bent state.
The locking step of the first embodiment of the method may comprise attaching the elongated plate element 29 in the locking step between the free ends 33 of the v-shaped elements of the first elongated web beam 23 and the free ends 33 of the v-shaped elements of the second elongated web beam 24. The locking step of the first embodiment of the method may comprise attaching the elongated plate element 29 to the first elongated web beam 23 and to the second elongated web beam 24 by welding.
In the third embodiment of the method shown in figures 25 to 34, the second providing step of the method comprises providing in the second providing step an elongated reinforcement beam 9 having an elongated bottom flange 10 comprising a first elongated reinforcement bar 21 and a second elongated reinforcement bar 22 attached to the first elongated reinforcement bar 21 by means of traverse reinforcement bar elements so that the first elongated reinforcement bar 21 and the a second elongated reinforcement bar 22 are parallel and spaced from each other, and a plurality of v-shaped elements made of sheet material each having a first end fastened to the first elongated reinforcement bar 21 and a second end fastened to the second elongated reinforcement bar 22 and having a free end 33 between said first end and said second end and each v-shaped element of said plurality of v-shaped elements forming one web element 1 1 of said plurality of web elements 1 1 of said at least one elongated reinforcement beam 9.
In the third embodiment of the method shown in figures 25 to 34, the locking step includes attaching an elongated reinforcement bar 28 to the free end 33 of the plurality of v-shaped elements for locking said elongated reinforcement beam 9 into bent state.
The third embodiment of the method may comprise attaching the elongated reinforcement bar 28 to the free end 33 of the plurality of v-shaped elements by pressing the free end 33 of the plurality of v-shaped elements against the elongated reinforcement bar 28 by means of an external pressing means.
The method may comprise arranging a reinforcement net 30 in the mold 1 prior the pouring step. The reinforcement net 30 is preferably, but not necessarily, arranged in the mold 1 so that the bottom flange of said at least one elongated reinforcement beam 9 is located between the bottom of the mold 1 and the reinforcement net 30.
It is apparent to a person skilled in the art that as technology advances, the basic idea of the invention can be implemented in various ways. The invention and its embodiments are therefore not restricted to the above examples, but they may vary within the scope of the claims.

Claims

A method for constructing a prefabricated concrete element, wherein the method comprises:
a first providing step for providing a mold (1 ) having a mold space
(2) with an open top
(3), wherein the mold space (2) is limited by a first end side
(4), a second end side
(5) at the opposite and of the mold space (2) with respect to the first end side (4), a first lateral side
(6) between the first end side (4) and the second end side (5), a second lateral side
(7) between the first end side (4) and the second end side (5), and a planar bottom (8), wherein the first end side (4) and the second end side (5) are planar and essentially parallel and wherein the first lateral side (6) and the second lateral side are planar and essentially parallel, and wherein the planar bottom
(8) extend essentially perpendicularly with respect to the first lateral side (6),
a second providing step for providing at least one elongated reinforcement beam (9) comprising an elongated bottom flange (10) from which a plurality of web elements (1 1 ) projects so that each web element (1 1 ) has an end attached to the elongated bottom flange (10) and a free end (33),
an arranging step for arranging said at least one elongated reinforcement beam (9) in the mold space (2) so that the elongated bottom flange (10) of said at least one elongated reinforcement beam (9) is in the mold space (2) and so that the elongated bottom flange (10) of said at least one elongated reinforcement beam
(9) is essentially parallel with the first lateral side (6) and the second lateral side (7) of the mold (1 ) and essentially parallel with the planar bottom (8) of the mold (1 ), and
a pouring step for pouring concrete (27) into the mold space (2) so that the elongated bottom flange
(10) of said at least one elongated reinforcement beam (9) becomes embedded in concrete (27) and so that said plurality of web elements
(1 1 ) of said at least one elongated reinforcement beam (9) at least partly projects out of the concrete (27) in the mold (1 ) to obtain a concrete plate (12) having at least one elongated reinforcement beam (9) party embedded in the concrete plate
(12) and partly projecting out of a top face
(13) of the concrete plate (12) and having a bottom face
(14) unpenetrated by said at least one elongated reinforcement beam (9) and having a first end face
(15) and an opposite second end face
(16) that is parallel with the first end face (15) and having a first lateral side face (17) and an opposite second lateral side face (18) that is parallel with the first lateral side face (17), characterized
by the pouring step is followed by a precambering step for bending the concrete plate (12) about an axis that is perpendicular to said first lateral side face
(17) and perpendicular to said second lateral side face
(18) and that is parallel with said first end face (15) and said second end face (16) so that also said at least one elongated reinforcement beam (9) is bent into a bent state for obtaining a precambered prefabricated concrete element
(19) having at least one bent elongated reinforcement beam (20),
by the precambering step is followed by a locking step for locking said at least one bent elongated reinforcement beam (20) into said bent state by means of a locking member (31 ) that is fastened to said at least one bent elongated reinforcement beam
(20) outside the concrete plate (12),
by providing in the second providing step an elongated reinforcement beam (9) having an elongated bottom flange (10) comprising a first elongated reinforcement bar (21 ) and a second elongated reinforcement bar (22) attached to the first elongated reinforcement bar (21 ) by means of traverse reinforcement bar elements so that the first elongated reinforcement bar
(21 ) and the a second elongated reinforcement bar
(22) are parallel and spaced from each other,
a first elongated web beam (23) comprising a reinforcement bar bent into zigzag form and having a side attached to the first parallel reinforcement bar so that the first elongated web beam (23) form a plurality of v-shaped elements each forming one web element (1 1 ) of said plurality of web elements (1 1 ) of said at least one elongated reinforcement beam (9), and
a second elongated web beam (24) comprising a reinforcement bar bent into zigzag form and having a side attached to the second parallel reinforcement bar so that the second elongated web beam (24) form a plurality of v-shaped elements each forming one web element (1 1 ) of said plurality of web elements (1 1 ) of said at least one elongated reinforcement beam (9)
by providing in the second providing step at least one elongated reinforcement beam (9) where an elongated plastically deformable open-sided channel element (25), which is made of plastically deformable material, such as of cold formed steel sheet material, or which is made plastically deformable, is attached to the first elongated web beam
(23) and to the second elongated web beam (24) between the first elongated web beam (23) and the second elongated web beam (24) so that an open side (26) of the elongated open-sided channel element (25) is turned away from the elongated bottom flange (10) of said least one elongated reinforcement beam (9),
by pouring concrete (27) in the pouring step into the mold (1 ) so that the elongated plastically deformable open-sided channel element (25) of said at least one elongated reinforcement beam (9) is located outside the concrete (27),
by the precambering step includes plastically deforming the elongated plastically deformable open-sided channel element (25) by bending the mold (1 ) so that the elongated plastically deformable open-sided channel element (25) is bent and stretched to obtain a bent and stretched elongated plastically deformed open-sided channel element (32), and
by the locking step includes using concrete (27) and at least one elongated reinforcement bar (28) as a locking member (31 ) by filling the bent and stretched elongated plastically deformed open-sided channel element (32) with concrete (27) and arranging said at least one elongated reinforcement bar (28) in the bent and stretched elongated plastically deformed open-sided channel element (32).
The method according to claim 1 , characterized by the elongated open-sided channel element (25) of said at least one elongated reinforcement beam (9) provided in the second providing step at least one elongated reinforcement beam (9) being attached element between the free ends (33) of the v-shaped elements of the first elongated web beam (23) and the free ends (33) of the v-shaped elements of the second elongated web beam (24).
The method according to claim 1 , characterized by the locking step includes attaching a locking member (31 ) in the form of an elongated reinforcement bar (28) to the first elongated web beam (23) and to the second elongated web beam (24) between the first elongated web beam (23) and the second elongated web beam (24) for locking said bent elongated reinforcement beam (20) into said bent state.
The method according to claim 3, characterized by attaching the elongated reinforcement bar (28) in the locking step between the free ends (33) of the v-shaped elements of the first elongated web beam (23) and the free ends (33) of the v-shaped elements of the second elongated web beam (24).
5. The method according to claim 3 or 4, characterized by attaching the elongated reinforcement bar (28) to the first elongated web beam (23) and to the second elongated web beam (24) by welding.
6. The method according to claim 1 , characterized by the locking step includes attaching locking member (31 ) in the form of an elongated plate element (29) to the first elongated web beam (23) and to the second elongated web beam (24) between the first elongated web beam (23) and the second elongated web beam (24) for locking said bent elongated reinforcement beam (20) into said bent state.
7. The method according to claim 6, characterized by attaching the elongated plate element (29) in the locking step between the free ends (33) of the v-shaped elements of the first elongated web beam (23) and the free ends (33) of the v-shaped elements of the second elongated web beam (24).
8. The method according to claim 6 or 7, characterized by attaching the elongated plate element (29) to the first elongated web beam (23) and to the second elongated web beam (24) by welding.
9. The method according to any of the claims 1 to 8, characterized by arranging a reinforcement net (30) in the mold (1 ) prior the pouring step
10. The method according to claim 9, characterized by arranging the reinforcement net (30) in the mold (1 ) so that the bottom flange of said at least one elongated reinforcement beam (9) is located between the planar bottom (8) of the mold (1 ) and the reinforcement net (30).
PCT/FI2016/050069 2015-02-27 2016-02-02 Method for constructing a prefabricated concrete element WO2016135374A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI20155137 2015-02-27
FI20155137A FI126201B (en) 2015-02-27 2015-02-27 METHOD FOR PREPARING A PREFABRICATED CONCRETE ELEMENT

Publications (1)

Publication Number Publication Date
WO2016135374A1 true WO2016135374A1 (en) 2016-09-01

Family

ID=55446826

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/FI2016/050069 WO2016135374A1 (en) 2015-02-27 2016-02-02 Method for constructing a prefabricated concrete element

Country Status (2)

Country Link
FI (1) FI126201B (en)
WO (1) WO2016135374A1 (en)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT372458B (en) * 1981-06-29 1983-02-15 Katzenberger Helmut Prefabricated ceiling element
WO1992012303A1 (en) 1990-12-28 1992-07-23 George Wegler Arrangement of building element
US5884442A (en) * 1997-03-28 1999-03-23 Structural Systems Ltd. Composite joist and concrete panel assembly
DE102004048190A1 (en) * 2004-09-30 2006-04-06 Drössler GmbH Umwelttechnik Production of a precast concrete element comprises casting the concrete in a shell divided by a hinge, removing and compressing

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT372458B (en) * 1981-06-29 1983-02-15 Katzenberger Helmut Prefabricated ceiling element
WO1992012303A1 (en) 1990-12-28 1992-07-23 George Wegler Arrangement of building element
US5884442A (en) * 1997-03-28 1999-03-23 Structural Systems Ltd. Composite joist and concrete panel assembly
DE102004048190A1 (en) * 2004-09-30 2006-04-06 Drössler GmbH Umwelttechnik Production of a precast concrete element comprises casting the concrete in a shell divided by a hinge, removing and compressing

Also Published As

Publication number Publication date
FI126201B (en) 2016-08-15
FI20155137A (en) 2016-08-15

Similar Documents

Publication Publication Date Title
US8733055B2 (en) Masonry with steel reinforcement strip having spacers
EP2655754B1 (en) A joining system arrangement for building elements
RU2392397C1 (en) Lattice beam
KR102174773B1 (en) Composite Deck with Lattice Reinforcement and Steel Plate, and Manufacturing Method thereof
KR102007464B1 (en) Prefabricated beam mold device
KR101680649B1 (en) Steel box girder using folded plate
KR20190012766A (en) Built-Up Beam
EP2689075B1 (en) System for reinforcing concrete slabs
KR101540649B1 (en) Steel Reinforcement Integrated Composite Structure with One-touch type Wire-mesh
WO2016135374A1 (en) Method for constructing a prefabricated concrete element
JP2013501169A (en) Reinforced concrete component comprising a reinforcing portion made of an L-shaped thin plate member
KR102131491B1 (en) Rigidity reinforcement apparatus for beam with web openings
KR102065623B1 (en) the improved yoke truss and the wall form structure using the same
KR20120036616A (en) Composite slab using corrugated plate and making method therewith
JP6679261B2 (en) Reinforcement structure of steel beam support of slab
ITBO20080144A1 (en) PANEL FOR THE CONSTRUCTION OF A FLOOR OR SIMILAR.
KR101019095B1 (en) Truss integrated Deck
EP1416101A1 (en) Composite beam
JP2018145674A (en) Wall beam joint structure
KR101177316B1 (en) Shear reinforcement device for junctional region of column-slab
KR101609616B1 (en) Steel horizontal assembly for forming a hollow slab
KR20160149524A (en) Formed steel beam having neutral axis lifting elements and composite beam using the same
EP4047147B1 (en) Construction reinforcement connector
KR200375841Y1 (en) Spacer
KR20090079561A (en) Shear reinforcement device in the slab-column connection

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 16707164

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 16707164

Country of ref document: EP

Kind code of ref document: A1