WO2014076716A1 - A wall system of parallelepiped precast building panel - Google Patents

A wall system of parallelepiped precast building panel Download PDF

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Publication number
WO2014076716A1
WO2014076716A1 PCT/IS2013/050009 IS2013050009W WO2014076716A1 WO 2014076716 A1 WO2014076716 A1 WO 2014076716A1 IS 2013050009 W IS2013050009 W IS 2013050009W WO 2014076716 A1 WO2014076716 A1 WO 2014076716A1
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WO
WIPO (PCT)
Prior art keywords
teeth
precast
pair
ribs
panels
Prior art date
Application number
PCT/IS2013/050009
Other languages
French (fr)
Inventor
Oskar HUNFJORD
Haukur J. EIRIKSSON
Jonas FRIMANNSSON
Original Assignee
Arccels Ehf
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 Arccels Ehf filed Critical Arccels Ehf
Publication of WO2014076716A1 publication Critical patent/WO2014076716A1/en

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/02—Structures consisting primarily of load-supporting, block-shaped, or slab-shaped elements
    • E04B1/04—Structures consisting primarily of load-supporting, block-shaped, or slab-shaped elements the elements consisting of concrete, e.g. reinforced concrete, or other stone-like material
    • E04B1/043—Connections specially adapted therefor
    • 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
    • E04C2/30—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by the shape or structure
    • E04C2/38—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by the shape or structure with attached ribs, flanges, or the like, e.g. framed panels
    • E04C2/382—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by the shape or structure with attached ribs, flanges, or the like, e.g. framed panels with a frame of concrete or other stone-like substance

Definitions

  • the present invention relates to a connection for precast elements made of reinforced concrete adapted to be used in building structure.
  • prefabricated concrete houses are built with in situ connections between prefabricated elements that are voluminous and material consuming. This approach does not allow for full benefits of what the prefabricated element system can offer.
  • the elements are in many cases large and heavy and the in situ connections are voluminous and material consuming. This approach does not allow for full benefits of what the prefabricated element system can offer.
  • assembly of prefabricated elements requires adjustments such as being chiselled on site to connect the elements accurately and securely together due to their size and shape.
  • the invention preferably seeks to mitigate or eliminate the above mentioned disadvantage singly or in any combination.
  • the solution provided by the present invention is focused on the connection between precast concrete elements, which are intended for house construction, i.e. between wall-, floor- and roof-elements, creating a complete building system.
  • the problem is solved by the shape of the parts connecting the elements and the way the precast elements are made.
  • the improved precast concrete elements of the present invention furthermore require reduced concrete volume in the in situ connections between the elements, thus reducing the work needed to be carried out at the
  • the present invention highly provides more efficiency in pre-casting and erecting prefabricated concrete buildings regarding the geometrical form of the elements, production, transportation, erection and connections.
  • the cost of buildings is reduced as compared to prior art methods with material reduction, utilization of vertical forms, serial production for stock, simpler connection methods and more efficient erection.
  • the precast elements are smaller in size and weight than conventional elements and are therefore easier to handle.
  • the elements are optimised regarding the geometrical shape, reducing volume and material consumption, but at the same time maintaining stiffness and strength according to modern building standards.
  • connections between the precast elements are far less material and time consuming to perform than in prior art and no reinforcement bars are extending from the precast units are required for improving workers safety.
  • Connections between the elements are formed with matching teeth and groves, which provides accurate and secure connections between the elements and the elements do not need to be adjusted or chiselled prior to connection due to the manufacture procedure.
  • the elements are precast in purpose made steel forms or moulds.
  • the forms are made with more strict tolerances than generally has been customary for concrete forms.
  • the forms will be located in the precast plant with vertical orientation instead of horizontal, thus gaining advantage in space utilization.
  • the vertical orientation of the forms makes it easier to cast L-shaped corner wall elements and other precast elements normally not produced today.
  • the precast elements described here can be erected in full adherence to a modular system. Since all the precast elements described are provided with matching teeth and grooves, the connections between the different types of elements, i.e. foundation-, wall-, floor- and roof-elements, are fully applicable. This means at the same time that stock production becomes feasible.
  • Today stock production of precast building elements is normally not feasible due to lack of standardization.
  • This solution can be applied in areas that are outside service areas of concrete plants.
  • the elements are lighter and easier to handle compared to conventional precast elements, which facilitates both transportation and erection.
  • the low quantity of concrete or mortar needed for the connections of the elements can easily be prepared at the building site rendering it unnecessary to get concrete by truck to the building site for this specific purpose as has been customary.
  • a parallelepiped precast building panel to form a wall or a building structure.
  • the Panel comprises at least one slab side, at least one pair of opposite arranged side ribs and at least one anchoring member for securing said ribs/panels together.
  • the anchoring member comprises longitudinal bolts with fastening nut engaging into aperture in said ribs to form a structural connection between a pair of panels.
  • the precast building panel is characterized in that the ribs comprise at least two positioning teeth and at least two connecting grooves, arranged at opposite rib sides, where the groves have substantially the same but mirror geometrical shape as said teeth. Furthermore, adjacent building panels are securely and accurately positioned together when the at one least pair of teeth engage with the pair of grooves to form a wall structure or building structure.
  • a method for erecting a wall structure of at least two parallelepiped precast building panels to form a wall or a building structure.
  • Each of said panels comprises at least one slab side, at least one pair of opposite arranged side ribs and at least one anchoring member for securing said ribs/panels together.
  • the anchoring member comprises longitudinal bolts engaging into apertures in the ribs to form a structural connection between a pair of panels.
  • the method is characterised in that the ribs comprise at least two positioning teeth and at least two connecting grooves arranged at opposite rib sides, where the groves have substantially the same but mirror geometrical shape as said teeth.
  • a pair of adjacent building panels are securely positioned together when at least the pair of teeth engage with the pair of grooves to form a wall structure or building structure.
  • said precast element is a precast wall element, the precast wall element further comprising first bolts arranged in horizontal holes at the distal ends of said side ribs adapted to engage with a corresponding holes at the distal ends at said adjacent precast wall element so as to perform a structural connection between said adjacent precast wall elements.
  • the parallelepiped precast building panel is wall-, floor- and roof-elements to form a wall or building structure.
  • the width of the positioning teeth is reduced in the connecting direction, said teeth having a trapezoid shape.
  • the distal end of a tooth has a smaller circumference or width compared to the end of the tooth next to the rib. This ensures the guiding function of the panel when it is being connected to another panel and is being guided into a groove of mirror geometrical shape as the tooth.
  • the moulds for forming the parallelepiped precast shaping panels (100) is made from purpose made steel.
  • the casting is performed when the mould is in a vertical position.
  • said precast element further comprises grooves and/or teeth arranged at the distal end of said top rib.
  • said precast element is a precast floor/roof element further comprising teeth and/or grooves at the periphery of the frame adapted to engage with said grooves and/or teeth arranged at the distal end of said top rib.
  • said precast element is a selected from being a precast wall element or a precast floor/roof element, the precast wall element further comprising grooves and/or teeth arranged at the distal end of said top rib adapted to connect said precast wall element with said precast floor/roof element having at the periphery of the frame corresponding teeth and/or grooves to engage with.
  • said precast element further comprises second bolts arranged at the distal end of said top rib adapted to engage with corresponding holes at the periphery of said floor/roof elements so as to perform a structural connection between said precast wall element and said precast floor/roof element.
  • Fig. 1 shows a wall element from both sides with teeth (1), grooves (2) and holes (4) for steel bolts at the distal ends of the element.
  • Fig. 2 shows teeth, grooves and steel bolts (3) intended for the connection between adjacent wall elements. The teeth and the grooves have substantially the same geometrical shape and they therefore fit into each other.
  • Fig. 3 shows the connections between the precast wall- and floor/roof elements.
  • the teeth and the grooves fit into each other and perpendicular to the matching surfaces steel bolts (3) are inserted through corresponding holes in the ribs.
  • the teeth, the grooves and the steel bolts (3) ensure adequate structural strength and stiffness of the connections between the precast elements, resulting in a precast element structure.
  • Fig. 4 shows the connection between adjoining floor/roof elements.
  • the connection is based on teeth (1) and grooves (2) in the ribs, fitting each other.
  • Horizontal steel bolts (3) are placed in horizontal holes (4) in the ribs.
  • the joint width is only several millimetres and a cement grout of suitable consistence is applied to one of the joint's surfaces before pulling the elements together with the steel bolts.
  • the teeth, the grooves, the steel bolts and the cement grout ensure adequate structural strength and stiffness of the connections between the precast elements, resulting in a precast element structure.
  • connections based on teeth and grooves can alternatively be carried out with grooves on both sides, with a concrete block glued into one of the adjoining grooves.

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Joining Of Building Structures In Genera (AREA)

Abstract

This invention relates to a connection for precast concrete elements intended for house construction, i.e.between wall-, floor-and roof-elements. The development of the connections has been carried out based on the element's premises, i.e. material consumption, structural features and building site erection. The connections consist of teeth and grooves which ensure structural strength and stiffness. The site erection of the elements becomes quick and simple, with low quantity of concrete or mortar needed at the building site.

Description

A WALL SYSTEM OF PARALLELEPIPED PRECAST BUILDING PANEL
FIELD OF THE INVENTION
The present invention relates to a connection for precast elements made of reinforced concrete adapted to be used in building structure.
BACKGROUND OF THE INVENTION
Today it is customary that prefabricated concrete houses are built with in situ connections between prefabricated elements that are voluminous and material consuming. This approach does not allow for full benefits of what the prefabricated element system can offer. The elements are in many cases large and heavy and the in situ connections are voluminous and material consuming. This approach does not allow for full benefits of what the prefabricated element system can offer.
Furthermore, assembly of prefabricated elements requires adjustments such as being chiselled on site to connect the elements accurately and securely together due to their size and shape.
The inventor of the present invention has appreciated that there is thus a need for improved connections between prefabricated elements to overcome the above mentioned problem and has in consequence devised the present invention.
SUMMARY OF THE INVENTION
It would be advantageous to achieve a precast element that improves the efficiency in erecting prefabricated concrete building regarding the geometrical form of the element connections. In general, the invention preferably seeks to mitigate or eliminate the above mentioned disadvantage singly or in any combination. In particular, it may be seen as an object of the present invention to provide a precast element with connections that solve the above mentioned problem, or other problems, of the prior art.
The solution provided by the present invention is focused on the connection between precast concrete elements, which are intended for house construction, i.e. between wall-, floor- and roof-elements, creating a complete building system. The problem is solved by the shape of the parts connecting the elements and the way the precast elements are made. The improved precast concrete elements of the present invention furthermore require reduced concrete volume in the in situ connections between the elements, thus reducing the work needed to be carried out at the
l building site and eliminating the need of ready mix concrete at the building site supplied with concrete trucks and -pumps. Elements produced with connections according to this building system in different factories in different countries will immediately fit to each other, even in distant projects.
Accordingly, the present invention highly provides more efficiency in pre-casting and erecting prefabricated concrete buildings regarding the geometrical form of the elements, production, transportation, erection and connections. The cost of buildings is reduced as compared to prior art methods with material reduction, utilization of vertical forms, serial production for stock, simpler connection methods and more efficient erection. The precast elements are smaller in size and weight than conventional elements and are therefore easier to handle. The elements are optimised regarding the geometrical shape, reducing volume and material consumption, but at the same time maintaining stiffness and strength according to modern building standards.
The in situ connections between the precast elements are far less material and time consuming to perform than in prior art and no reinforcement bars are extending from the precast units are required for improving workers safety. Connections between the elements are formed with matching teeth and groves, which provides accurate and secure connections between the elements and the elements do not need to be adjusted or chiselled prior to connection due to the manufacture procedure.
Furthermore adjoining elements are bolted together with bolts placed in preformed holes in the elements. The method ensures structural qualities and strength adequate for buildings in seismic areas.
The elements are precast in purpose made steel forms or moulds. The forms are made with more strict tolerances than generally has been customary for concrete forms. The forms will be located in the precast plant with vertical orientation instead of horizontal, thus gaining advantage in space utilization. The vertical orientation of the forms makes it easier to cast L-shaped corner wall elements and other precast elements normally not produced today. By applying a corner wall element in every corner of a building, the precast elements described here can be erected in full adherence to a modular system. Since all the precast elements described are provided with matching teeth and grooves, the connections between the different types of elements, i.e. foundation-, wall-, floor- and roof-elements, are fully applicable. This means at the same time that stock production becomes feasible. Today stock production of precast building elements is normally not feasible due to lack of standardization.
This solution can be applied in areas that are outside service areas of concrete plants. The elements are lighter and easier to handle compared to conventional precast elements, which facilitates both transportation and erection. The low quantity of concrete or mortar needed for the connections of the elements can easily be prepared at the building site rendering it unnecessary to get concrete by truck to the building site for this specific purpose as has been customary.
In a first aspect of the present invention a parallelepiped precast building panel to form a wall or a building structure. The Panel comprises at least one slab side, at least one pair of opposite arranged side ribs and at least one anchoring member for securing said ribs/panels together. The anchoring member comprises longitudinal bolts with fastening nut engaging into aperture in said ribs to form a structural connection between a pair of panels. The precast building panel is characterized in that the ribs comprise at least two positioning teeth and at least two connecting grooves, arranged at opposite rib sides, where the groves have substantially the same but mirror geometrical shape as said teeth. Furthermore, adjacent building panels are securely and accurately positioned together when the at one least pair of teeth engage with the pair of grooves to form a wall structure or building structure.
In a second aspect of the present invention a method is provided for erecting a wall structure of at least two parallelepiped precast building panels to form a wall or a building structure. Each of said panels comprises at least one slab side, at least one pair of opposite arranged side ribs and at least one anchoring member for securing said ribs/panels together. The anchoring member comprises longitudinal bolts engaging into apertures in the ribs to form a structural connection between a pair of panels. The method is characterised in that the ribs comprise at least two positioning teeth and at least two connecting grooves arranged at opposite rib sides, where the groves have substantially the same but mirror geometrical shape as said teeth. Furthermore, a pair of adjacent building panels are securely positioned together when at least the pair of teeth engage with the pair of grooves to form a wall structure or building structure.
In one embodiment, said precast element is a precast wall element, the precast wall element further comprising first bolts arranged in horizontal holes at the distal ends of said side ribs adapted to engage with a corresponding holes at the distal ends at said adjacent precast wall element so as to perform a structural connection between said adjacent precast wall elements.
In an embodiment of the present invention the parallelepiped precast building panel is wall-, floor- and roof-elements to form a wall or building structure.
In an embodiment of the present invention the width of the positioning teeth is reduced in the connecting direction, said teeth having a trapezoid shape. This means that the distal end of a tooth has a smaller circumference or width compared to the end of the tooth next to the rib. This ensures the guiding function of the panel when it is being connected to another panel and is being guided into a groove of mirror geometrical shape as the tooth. This is further illustrated in figure 2B. In an embodiment of the present invention the moulds for forming the parallelepiped precast shaping panels (100) is made from purpose made steel.
In an embodiment of the present invention the casting is performed when the mould is in a vertical position.
In one embodiment, said precast element further comprises grooves and/or teeth arranged at the distal end of said top rib.
In one embodiment, said precast element is a precast floor/roof element further comprising teeth and/or grooves at the periphery of the frame adapted to engage with said grooves and/or teeth arranged at the distal end of said top rib.
In one embodiment, further comprising second bolts arranged in vertical holes at the distal end of said top rib or at the periphery of said frame at said precast floor/roof element adapted to engage with a corresponding holes at the periphery of said floor/roof elements so as to perform a structural connection between said precast wall element and said precast floor/roof element.
In one embodiment, said precast element is a selected from being a precast wall element or a precast floor/roof element, the precast wall element further comprising grooves and/or teeth arranged at the distal end of said top rib adapted to connect said precast wall element with said precast floor/roof element having at the periphery of the frame corresponding teeth and/or grooves to engage with.
In one embodiment, said precast element further comprises second bolts arranged at the distal end of said top rib adapted to engage with corresponding holes at the periphery of said floor/roof elements so as to perform a structural connection between said precast wall element and said precast floor/roof element.
DETAILED DESCRIPTION OF THE INVENTION Brief description of drawings
Fig. 1 shows a wall element from both sides with teeth (1), grooves (2) and holes (4) for steel bolts at the distal ends of the element. Fig. 2 shows teeth, grooves and steel bolts (3) intended for the connection between adjacent wall elements. The teeth and the grooves have substantially the same geometrical shape and they therefore fit into each other.
Fig. 3 shows the connections between the precast wall- and floor/roof elements. The teeth and the grooves fit into each other and perpendicular to the matching surfaces steel bolts (3) are inserted through corresponding holes in the ribs. The teeth, the grooves and the steel bolts (3) ensure adequate structural strength and stiffness of the connections between the precast elements, resulting in a precast element structure.
Fig. 4 shows the connection between adjoining floor/roof elements. The connection is based on teeth (1) and grooves (2) in the ribs, fitting each other. Horizontal steel bolts (3) are placed in horizontal holes (4) in the ribs. The invention will now be described in relation to the drawings. It should be noted that the drawings show an embodiment of the invention and should not be considered limited to the scope of the claims.
The structural connections between adjacent elements are based on teeth and grooves, as shown on figures 1, 2, 3 and 4. The teeth and the grooves have substantially the same geometrical shape and they therefore fit into each other. Perpendicular to the matching surfaces steel bolts are inserted through
corresponding holes in the ribs. The joint width is only several millimetres and a cement grout of suitable consistence is applied to one of the joint's surfaces before pulling the elements together with the steel bolts. The teeth, the grooves, the steel bolts and the cement grout ensure adequate structural strength and stiffness of the connections between the precast elements, resulting in a precast element structure.
It can be seen on figure 2 that the precast elements are completely free from steel reinforcement of any kind protruding from the concrete surface, adding to production efficiency and workers' safety during handling of the elements.
The above described connections based on teeth and grooves can alternatively be carried out with grooves on both sides, with a concrete block glued into one of the adjoining grooves.
While the invention has been illustrated and described in detail in the figures and foregoing description, such illustration and description are to be considered illustrative or exemplary and not restrictive; the invention is not limited to the disclosed embodiments. Other variations to the disclosed embodiments can be understood and effected by those skilled in the art in practicing the claimed invention, from a study of the figures, the disclosure, and the appended claims. In the claims, the word "comprising" does not exclude other elements or steps, and the indefinite article "a" or "an" does not exclude a plurality. The mere fact that certain measures are recited in mutually different dependent claims does not indicate that a combination of these measures cannot be used to advantage. Any reference signs in the claims should not be construed as limiting the scope.

Claims

1. A wall system of parallelepiped precast building panel ( 100), , wherein said panel comprising :
• at least one slab side (4),
• at least one pair of opposite arranged side ribs (1, 2) and
• at least one anchoring member (80) for securing said ribs/panels together, wherein said anchoring member comprising longitudinal bolts (81) with fastening nut (82) engaging into aperture ( 14) in said ribs (1, 2) to form a structural connection between a pair of panels, characterized in that said ribs (1, 2) comprising at least two positioning teeth (10) and at least two connecting grooves ( 11), arranged at opposite rib sides, said groves having substantially the same but mirror geometrical shape as said teeth, and wherein adjacent building panels are securely and accurately positioned together when said at least pair of teeth (10) engage with said pair of grooves (11) to form a wall structure (101).
2. The wall system of parallelepiped precast building panel (100), according to
claim 1, wherein the precast building panel (100) is wall-, floor- and roof- elements to form a wall or building structure.
3. The wall system of parallelepiped precast building panel (100), according to
claim 1, wherein the width of the positioning teeth is reduced in the connecting direction, said teeth having a trapezoid shape.
4. Method of erecting a wall system of at least two parallelepiped precast building panels (100), to form a wall structure, wherein each of said panels comprising : · at least one slab side (4) and
• at least one pair of opposite arranged side ribs (1, 2),
• at least one anchoring member (80) for securing said ribs/panels together, wherein said anchoring member comprising longitudinal bolts (81) engaging into aperture (14) in said ribs (1, 2) to form a structural connection between a pair of panels, characterized in that said ribs (1, 2) comprising at least two positioning teeth (10) and at least two connecting grooves ( 11), arranged at opposite rib sides, said groves having substantially the same but mirror geometrical shape as said teeth, wherein a pair of building panels are securely positioned together when at least said pair of teeth (10) engage with said pair of grooves (11) to form a wall structure (101).
The method according to claim 4, wherein the moulds for forming the parallelepiped precast shaping panels (100) is made from purpose made steel.
The method according to claim 4, wherein the casting is performed when the mould is in a vertical position.
PCT/IS2013/050009 2012-11-19 2013-11-18 A wall system of parallelepiped precast building panel WO2014076716A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IS9012 2012-11-19
IS9012 2012-11-19

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WO2014076716A1 true WO2014076716A1 (en) 2014-05-22

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104110096A (en) * 2014-08-06 2014-10-22 四川省建筑科学研究院 Prefabricated building plate, building wall part and building house composed of prefabricated building plates and construction method of building house
ES2698723A1 (en) * 2018-08-10 2019-02-05 Sustainable Building S L MOLDING ASSEMBLY FOR CONSTRUCTION OF BEAMS BY RAPID ASSEMBLY SYSTEMS (Machine-translation by Google Translate, not legally binding)
CN112324002A (en) * 2020-10-15 2021-02-05 安阳工学院 Prefabricated external wall panel of assembly type structure

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3564791A (en) * 1969-02-27 1971-02-23 George F Arp Swimming pool wall
DE102011011414A1 (en) * 2011-02-16 2012-08-16 Drössler GmbH Umwelttechnik concrete structure

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3564791A (en) * 1969-02-27 1971-02-23 George F Arp Swimming pool wall
DE102011011414A1 (en) * 2011-02-16 2012-08-16 Drössler GmbH Umwelttechnik concrete structure

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104110096A (en) * 2014-08-06 2014-10-22 四川省建筑科学研究院 Prefabricated building plate, building wall part and building house composed of prefabricated building plates and construction method of building house
ES2698723A1 (en) * 2018-08-10 2019-02-05 Sustainable Building S L MOLDING ASSEMBLY FOR CONSTRUCTION OF BEAMS BY RAPID ASSEMBLY SYSTEMS (Machine-translation by Google Translate, not legally binding)
WO2020030842A1 (en) * 2018-08-10 2020-02-13 Sustainable Building S.L. Moulding unit for girder construction by means of quick-assembly systems
CN112324002A (en) * 2020-10-15 2021-02-05 安阳工学院 Prefabricated external wall panel of assembly type structure

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