WO2009027960A1 - Connecteur pour connecter une paire de panneaux de coffrage espacés, ensemble de coffrage et procédé pour construire un ensemble de coffrage - Google Patents

Connecteur pour connecter une paire de panneaux de coffrage espacés, ensemble de coffrage et procédé pour construire un ensemble de coffrage Download PDF

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Publication number
WO2009027960A1
WO2009027960A1 PCT/IE2008/000082 IE2008000082W WO2009027960A1 WO 2009027960 A1 WO2009027960 A1 WO 2009027960A1 IE 2008000082 W IE2008000082 W IE 2008000082W WO 2009027960 A1 WO2009027960 A1 WO 2009027960A1
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WO
WIPO (PCT)
Prior art keywords
formwork
reinforcing
connector
panel
assembly
Prior art date
Application number
PCT/IE2008/000082
Other languages
English (en)
Inventor
Patrick Joseph O'carroll
Peter Thomas Flynn
Original Assignee
Eden Research And Development Company Limited
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 Eden Research And Development Company Limited filed Critical Eden Research And Development Company Limited
Publication of WO2009027960A1 publication Critical patent/WO2009027960A1/fr

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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
    • E04B2/00—Walls, e.g. partitions, for buildings; Wall construction with regard to insulation; Connections specially adapted to walls
    • E04B2/84—Walls made by casting, pouring, or tamping in situ
    • E04B2/86—Walls made by casting, pouring, or tamping in situ made in permanent forms
    • E04B2/8635—Walls made by casting, pouring, or tamping in situ made in permanent forms with ties attached to the inner faces of the forms

Definitions

  • a connector for connecting a pair of spaced apart formwork panels, a formwork assembly and a method for constructing the formwork assembly
  • the present invention relates to a connector for connecting a pair of spaced apart formwork panels of a formwork assembly, and the invention also relates to a formwork assembly and to a method for producing the formwork assembly.
  • the invention also relates to a reinforcing sub-assembly for use in the framework assembly, and to a method for producing the reinforcing sub-assembly.
  • the invention also relates to a wall constructed from the formwork assembly and to a method for constructing such a wall.
  • One typical form of construction is to form the load bearing walls of cast in-situ concrete, which in general is steel reinforced.
  • the walls may be constructed by constructing shuttering formed by spaced apart panels, typically of timber, for example, marine plywood, within which concrete is poured to form the wall. Prior to pouring the concrete, reinforcing steel is located between the panels of the shuttering. When the concrete has cured, the panels of the shuttering are removed.
  • This method for constructing cast in-situ walls of a building has a number of disadvantages. Firstly, suitable shuttering must be constructed, which typically is constructed on site.
  • shuttering whether constructed on site or off-site, requires the services of skilled craftsmen, such as carpenters, and thus adds significantly to the cost of constructing a building.
  • skilled craftsmen such as carpenters
  • the need to construct shuttering on site is a relatively time consuming task, and tends to slow down the construction of a building.
  • shuttering can be difficult to dismantle and dangerous to move around a building site. Additionally, in many cases shuttering may be scrapped after only one use, which is wasteful and adds unnecessarily to the construction cost of a building.
  • formwork which is commonly referred to as permanent formwork for use in the construction of cast in-situ walls.
  • the formwork acts as the shuttering, and remains in place after the concrete of the wall has cured, and thus the respective major surfaces of the wall are formed by the formwork.
  • Such formwork in general, comprises a pair of spaced apart formwork panels joined by a plurality of spaced apart connectors which secure the formwork panels in spaced apart relationship relative to each other for receiving poured concrete therebetween, and the formwork panels form the surfaces of the constructed wall.
  • This formwork in general, comprises relatively thin precast concrete panels, although it is also known to produce such formwork of panels of a mixture of cement and wood chips.
  • Reinforcing material such as weld-mesh panels are located between the formwork panels in spaced apart relationship thereto.
  • a pair of spaced apart panels of reinforcing material are located between the formwork panels, and the reinforcing panels are spaced apart inwardly from the formwork panels by the connectors.
  • Such formwork suffers from a number of disadvantages. Firstly, panels of precast concrete are heavy to lift on site, typically weighing in the region of 300kg/M 2 to 375kg/M 2 , secondly, problems arise in securing the connectors to the respective formwork panels, so that the formwork panels are accurately aligned with each other. Thirdly, difficulties arise in securing and locating the reinforcing panels between the formwork panels. Fourthly, the formwork thickness can add considerably to the overall wall thickness.
  • the present invention is directed towards providing a connector for connecting a pair of spaced apart formwork panels of a formwork assembly which addresses at least some of the problems of known formwork assemblies, and the invention is also directed towards a formwork assembly, a method for producing the formwork assembly, a wall constructed from the formwork assembly and a method for constructing such a wall.
  • the invention is also directed towards a reinforcing sub- assembly for use in a formwork assembly, and to a method for producing the reinforcing sub-assembly.
  • a connector for connecting spaced apart first and second formwork panels of a formwork assembly comprising an elongated shank extending between a first anchor means for securing the connector to the first formwork panel and a second anchor means for securing the connector to the second formwork panel with the first and second formwork panels spaced apart from each other, the first and second anchor means being adapted for bonding to the respective first and second formwork panels.
  • the invention also provides a reinforcing sub-assembly comprising a first reinforcing panel and a second reinforcing panel spaced apart from the first reinforcing panel, . and a plurality of connectors engaging and retaining the first and second reinforcing panels in the spaced apart relationship relative to each other, at least one of the connectors being a connector according to the invention.
  • the invention further provides a reinforcing sub-assembly for connecting first and second formwork panels of a formwork assembly, the reinforcing sub-assembly comprising at least a first reinforcing panel, and a plurality of connectors engaging the first reinforcing panel, each connector comprising an elongated shank extending between a first anchor means for securing the connector to the first formwork panel and a second anchor means for securing the connector to the second formwork panel with the first and second formwork panels spaced apart from each other, the first and second anchor means of each connector being adapted for bonding to the respective framework panels, and at least one engagement means being provided on each connector for engaging and retaining the first reinforcing panel spaced apart from the first and second formwork panels.
  • the invention provides a formwork assembly comprising a first framework panel and a spaced apart second formwork panel defining a void therebetween for a castable material, the first and second formwork panels being connected together by a plurality of spaced apart connectors, the connectors being connectors according to the invention.
  • the invention provides a formwork assembly comprising a first formwork panel and a spaced apart second formwork panel defining a void therebetween for a castable material, the first and second formwork panels being connected together and retained in spaced apart relationship by a plurality of spaced apart connectors, each connector comprising an elongated shank extending between a first anchor means for securing to the first formwork panel and a second anchor means for securing to the second formwork panel with the respective formwork panels spaced apart from each other, the first and second anchor means being adapted for bonding to the respective first and second formwork panels.
  • the invention also provides a formwork assembly comprising first and second spaced apart formwork panels defining a void therebetween, and a reinforcing sub- assembly located in the void, the reinforcing sub-assembly being a reinforcing sub- assembly according to the invention, the connectors of the sub-assembly being connected to the respective formwork panels for securing the formwork panels spaced apart relative to each other.
  • each anchor means of each connector defines a panel abutment surface for abutting the adjacent one of the first and second formwork panels.
  • the panel abutment surfaces of the respective first and second anchor means of each connector are adapted for receiving a suitable bonding agent for bonding the anchor means to the adjacent one of the first and second formwork panels.
  • the panel abutment surface of each anchor means of each connector is provided with a plurality of spaced apart retaining ridges which define troughs therebetween for accommodating the bonding agent.
  • the retaining ridges of each anchor means of each connector extend parallel to each other.
  • a reinforcing panel is located in the void between the first and second formwork panels and spaced apart therefrom.
  • each connector comprises at least one engagement means for engaging and retaining the reinforcing panel spaced apart from the first and second formwork panels.
  • the engagement means on each connector for engaging the first reinforcing panel comprises a first engagement means located intermediate the first and second anchor means.
  • a second reinforcing panel is located in the void between the first and second formwork panels and spaced apart therefrom, and spaced apart from the first reinforcing panel, and a second engagement means is provided on each connector spaced apart from the first engagement means for engaging the second reinforcing panel and for locating the second reinforcing panel within the void between the first and second formwork panels in spaced apart relationship thereto and spaced apart from the first reinforcing panel.
  • the second engagement means of each connector is adapted for locating the second reinforcing panel at a location on the shank between the second formwork panel and the first reinforcing panel.
  • the first engagement means of each connector is adapted for locating the first reinforcing panel at a location on the shank between the first formwork panel and the second reinforcing panel.
  • the first and second engagement means of the respective connectors are adapted for retaining the first and second reinforcing panels parallel to each other.
  • the connectors are configured on the at least first reinforcing panel in a matrix formation formed by the connectors defining a plurality of rows and a plurality of columns.
  • the rows defined by the connectors extend parallel to each other, and the columns defined by the connectors extend parallel to each other.
  • the rows and columns of the connectors extend perpendicularly to each other.
  • adjacent connectors in each row are spaced apart from each other a distance not greater than 350mm.
  • adjacent connectors in each row are spaced apart from each other a distance not greater than 300mm.
  • adjacent connectors in each row are spaced apart from each other a distance of approximately 200mm.
  • adjacent connectors in each column are spaced apart from each other a distance not greater than 350mm.
  • adjacent connectors in each column are spaced apart from each other a distance not greater than 300mm.
  • adjacent connectors in each column are spaced apart from each other a distance of approximately 200mm.
  • the first engagement means of each connector is adapted for pivotally engaging the first reinforcing panel
  • the second engagement means is adapted for receiving the second reinforcing panel when the first and second reinforcing panels are located in spaced apart relationship relative to each other, and the connector with the first engagement means engaging the first reinforcing panel is pivoted about the first reinforcing panel.
  • first engagement means of each connector comprises a first clip for engaging a portion of the first reinforcing panel
  • second engagement means comprises a second clip for engaging a portion of the second reinforcing panel
  • the first clip of each connector comprises a first engagement leaf resiliently urged towards an engagement portion of the shank, and defining with the engagement portion a first engagement slot for engaging the portion of the first reinforcing panel therein.
  • the first engagement leaf of each connector is resiliently carried on a first carrier means.
  • the first carrier means of each connector comprises a resilient first carrier leaf.
  • the first carrier leaf of each connector extends from the first anchor means.
  • a plurality of spaced apart first gripping ridges are located respectively on the first engagement leaf and on the engagement portion of the shank of each connector for engaging and gripping the portion of the first reinforcing panel.
  • the second clip of each connector comprises a pair of second engagement leaves carried on the shank, at least one of the second engagement leaves being resiliently urged towards the other of the second engagement leaves and defining therewith a second engagement slot for engaging the portion of the second reinforcing panel therein.
  • at least one of the second engagement leaves of each connector is resiliently carried on a second carrier means for resiliently urging the said at least one of the second engagement leaves towards the other of the second engagement leaves.
  • each second engagement leaf of each connector is resiliently carried on a corresponding second carrier means.
  • each second carrier means of each connector comprises a resilient second carrier leaf.
  • the respective second carrier means of each connector extend from the shank spaced apart from each other axially along the shank.
  • the second engagement leaves of each connector are located between the respective second carrier means.
  • each second engagement leaf of each connector comprises a plurality of spaced apart second gripping ridges for engaging and gripping the second reinforcing panel.
  • the second engagement means of each connector is located adjacent the second anchor means.
  • the first engagement means of each connector comprises a first lead-in for accommodating the first resilient panel into engagement with the first engagement means.
  • the second engagement means of each connector comprises a second lead-in for accommodating the second resilient material into engagement with the second engagement means.
  • the first engagement means of each connector is located adjacent the first anchor means.
  • each reinforcing panel comprises a panel formed by a weld mesh panel having a plurality of longitudinally extending parallel spaced apart rods joined by a plurality of parallel spaced apart transversely extending rods, and the first engagement means of the respective connectors engage corresponding ones of the rods of the first reinforcing panel, and the second engagement means of the respective connectors engage corresponding rods of the second reinforcing panel.
  • the first and second engagement means of the connectors engage corresponding adjacent ones of the horizontal rods of the respective first and second reinforcing panels.
  • the reinforcing panels extend parallel to each other.
  • each connector is formed in two parts, which are adjustably coupled to each other for adjusting the length thereof and in turn the spacing between the respective first and second anchor means.
  • one part of the shank of each connector forms a socket for engaging a plug formed on the other part of the shank for securing the respective parts of the shank together.
  • one of the plug and socket of the respective parts of the shank of each connector is adapted for engaging the other of the plug and the socket for facilitating adjustment of the length of the shank.
  • one of the plug and the socket of each connector is provided with at least one of a pair of complementary interengageable formations, and the other of the plug and the socket is provided with at least one of the other of the pair of interengageable complementary formations such that the plug is engageable with and retained the socket at respective different axial locations.
  • the socket of each connector is provided with more of the complementary interengageable formations than the plug.
  • one of the pair of interengageable complementary formations of each connector comprises a ridge, and the other of the pair of interengageable complementary formations comprises a recess.
  • the plug of each connector is provided with at least one ridge.
  • each connector is of a plasties material.
  • each connector is of injection moulded plasties material.
  • each formwork panel comprises a cementitious material.
  • each formwork panel is formed by a fibre board panel.
  • the cement fibre board panel of each formwork panel comprises fibres of any one or more of the following materials: timber, glass, plastics material, and acrylic material.
  • each formwork panel comprises a cellulose/cementitious material.
  • the first and second formwork panels are adapted to form respective opposite outer surfaces of a wall formed by casting a material in the void between the first and second formwork panels.
  • first engagement means of each connector is adapted for engaging a first reinforcing material
  • second engagement means of each connector is adapted for engaging a second reinforcing material
  • first reinforcing material comprises a first reinforcing panel
  • second reinforcing material comprises a second reinforcing panel
  • the connectors retain the first and second formwork panels parallel to each other.
  • the connectors are configured on the first and second formwork panels in a matrix formation formed by the connectors defining a plurality of rows and a plurality of columns.
  • the connectors retain the first and second reinforcing panels spaced apart from each other and advantageously, parallel to each other, and ideally, the connectors retain the first and second reinforcing panels spaced apart from the first and second formwork panels, and spaced apart therefrom.
  • the invention also provides a wall constructed from the formwork assembly according to the invention, and a material cast in the void between the first and second formwork panels.
  • the material cast in the void between the first and second formwork panels comprises a cementitious material.
  • the material cast in the void between the first and second formwork panels is concrete.
  • the wall supports a floor, and reinforcing material in the floor is tied into at least one reinforcing panel in the wall.
  • the floor is cast in-situ.
  • the floor is cast with the wall.
  • the invention further provides a method for producing a formwork assembly comprising spaced apart first and second formwork panels, the method comprising providing a plurality of connectors for connecting the formwork panels spaced apart relative to each other, each connector comprising an elongated shank extending between a first anchor means for securing to the first formwork panel and a second anchor means for securing to the second formwork panel, the first and second anchor means being adapted for bonding to the respective framework panels, the method further comprising bonding the first anchor means to the first formwork panel and bonding the second anchor means to the second formwork panel with the formwork panels spaced apart defining a void for a castable material.
  • a reinforcing panel is located in the void between the first and second formwork panels and spaced apart therefrom.
  • each connector is provided with at least one engagement means for engaging and retaining the reinforcing panel spaced apart from the first and second formwork panels.
  • the engagement means on each connector for engaging the first reinforcing panel comprises a first engagement means located intermediate the first and second anchor means.
  • a second reinforcing panel is located in the void between the first and second formwork panels and spaced apart therefrom, and spaced apart from the first reinforcing panel, and a second engagement means is provided on each connector spaced apart from the first engagement means for engaging the second reinforcing panel and for locating the second reinforcing panel within the void between the first and second formwork panels in spaced apart relationship thereto and spaced apart from the first reinforcing panel.
  • the second engagement means of each connector is provided for locating the second reinforcing panel at a location on the shank between the second formwork panel and the first reinforcing panel.
  • the invention also provides a method for constructing a cast in-situ wall comprising providing a formwork assembly according to the invention and erecting the formwork assembly on a floor slab or a foundation, and pouring a castable material into the void between the first and second formwork panels and allowing the castable material to cure so that the castable material in conjunction with the formwork assembly forms the cast in-situ wall.
  • the castable material is a cementitious material.
  • the castable material is concrete.
  • a floor supported by the wall is cast with the wall, and prior to casting, reinforcing material of the floor is tied to at least one reinforcing panel in the wall.
  • the floor is cast in-situ.
  • the floor is cast in-situ with the wall.
  • the formwork assembly is particularly suitable for forming load bearing walls, and in particular, the formwork assembly according to the invention is suitable for forming an inner load bearing leaf of a cavity wall.
  • the formwork assembly prior to concrete filling is relatively lightweight in comparison to other systems, and in general, the formwork assembly according to the invention weighs approximately 50kg/M 2 to 60kg/M 2 of wall surface.
  • the connectors are configured relative to the reinforcing sub-assembly and to the formwork panels in the form of a matrix defined by rows and columns of the connectors and further, by virtue of the fact that the spacing between the connectors in the respective rows and columns does not exceed 350mm, and preferably, does not exceed 300mm, and ideally, is approximately 200mm, the strength of the formwork panels can be significantly reduced over prior art formwork panels.
  • the formwork assembly according to the invention is significantly lighter than prior art formwork assemblies, and furthermore, permits the casting in-situ of a wall of reduced thickness due to the reduced thickness of the formwork panels.
  • a further advantage of the invention is that the connectors for connecting the formwork panels together can be readily easily secured to the formwork panels with minimum effort, and in general, once the inner and outer formwork panels are aligned with each other, and with the reinforcing sub-assembly which already comprises the connectors in the matrix configuration, little or no further alignment is required.
  • the reinforcing sub-assembly is readily easily produced, and the formwork panels can then readily easily be secured to the reinforcing sub-assembly without difficulty, and without any difficulty arising in locating the reinforcing panels relative to the formwork panels, since the reinforcing panels are retained parallel relative to each other by the connectors. Accordingly, the formwork assembly lends itself ideally to assembly with the minimum amount of alignment of the various components thereof. By assembling the first and second reinforcing panels with the connectors to form a reinforcing sub-assembly, the first and second formwork panels can then be readily easily aligned and engaged with the reinforcing sub-assembly.
  • Fig. 1 is a perspective view of a formwork assembly according to the invention
  • Fig. 2 is a perspective view of a reinforcing sub-assembly also according to the invention of the formwork assembly of Fig. 1 ,
  • Fig. 3 is a perspective view of a portion of the reinforcing sub-assembly of
  • Fig. 4 is a perspective view of the formwork assembly of Fig. 1 being assembled
  • Fig. 5 is a perspective view of the formwork assembly of Fig. 1 also being assembled
  • Fig. 6 is a perspective view of the formwork assembly of Fig. 1 also being assembled
  • Fig. 7 is an end elevational view of a portion of the reinforcing sub-assembly of Fig. 2
  • Fig. 8 is an end elevational view of the portion of the reinforcing sub- assembly of Fig. 7 illustrating the reinforcing sub-assembly being assembled
  • Fig. 9 is a perspective view of a connector also according to the invention for use in the formwork assembly of Fig. 1 ,
  • Fig. 10 is another perspective view of the connector of Fig. 9,
  • Fig. 11 is a side elevational view of the connector of Fig. 9,
  • Fig. 12 is a transverse cross-sectional end elevational view of a portion of the formwork assembly of Fig. 1 in use in the construction of a wall,
  • Fig. 13 is a perspective view of a connector according to another embodiment of the invention.
  • Fig. 14 is another perspective view of the connector of Fig. 13, and
  • Fig. 15 is an exploded perspective view of a portion of the connector of Fig.
  • the formwork assembly 1 is a permanent formwork assembly and is provided to remain in place after the concrete of the wall has been cast and has cured.
  • the formwork assembly 1 comprises spaced apart parallel first and second formwork panels, namely, an inner formwork panel 4 and an outer formwork panel 5, which when the wall 2 is constructed from part of the wall, and in particular define inner and outer surfaces 7 and 8, respectively, of the wall 2, as will be described in more detail below.
  • the inner and outer formwork panels 4 and 5 are of a cementitious/cellulose composition, and in this embodiment of the invention are fibre board panels, which are panels of cement reinforced with timber fibres.
  • a plurality of spaced apart connectors are secured to and extend between the inner and outer formwork panels 4 and 5, and retain the inner and outer formwork panels 4 and 5 in the spaced apart relationship to define a void 11 for accommodating concrete 12 which is cast between the formwork panels 4 and 5, see Fig. 12.
  • the connectors 10 are secured to the formwork panels 4 and 5 by bonding and retain the formwork panels 4 and 5 in the spaced apart relationship during pouring of the concrete 12 into the void 11 and while the concrete 12 is curing in the void 11.
  • the connectors 10 which are described in detail below with reference to Figs.
  • first and second reinforcing panels 14 and 15 respectively, of weld-mesh material in the void 11 between the inner and outer formwork panels 4 and 5.
  • the weld-mesh material of the first and second reinforcing panels 14 and 15 comprises a plurality of longitudinally extending parallel spaced apart rods of steel, namely, vertical rods 16 which are joined by a plurality of parallel spaced apart transversely extending rods of steel, namely, horizontal rods 17 at weld joints 18.
  • the connectors 10 locate the first and second reinforcing panels 14 and 15 parallel to and spaced apart from each other and parallel to and spaced apart from the inner and outer formwork panels 4 and 5.
  • the connectors 10 are configured in a matrix formed by parallel rows 13 and parallel columns 19 of the connectors 10.
  • the rows 13 of the connectors 10 extend perpendicularly relative to the columns 19 of the connectors 10.
  • the spacing between the connectors 10 in each row 13 is approximately 200mm, and the spacing between the connectors 10 in each column 19 is also approximately 200mm. It has been found that by spacing the connectors 10 in the respective rows 13 and columns 19 a distance of approximately 200mm, inner and outer formwork panels 4 and 5 of reduced strength may be used, and therefore the inner and outer formwork panels 4 and 5 may be of reduced thickness. This therefore has two significant advantages.
  • the overall weight of the formwork assembly 1 is significantly reduced over prior art formwork assemblies, and secondly, the overall width of the formwork assembly 1 for a given void width is significantly reduced.
  • the overall width of the subsequently cast in-situ wall is also reduced for a given load bearing capacity over prior art walls.
  • each connector 10 is injection moulded of plastics material, and comprises an elongated shank 20 extending between first and second anchor means, namely, first and second anchor plates 21 and 22, respectively, each of which defines a panel abutment surface 23 which is adapted for bonding to the adjacent one of the inner and outer formwork panels 4 and 5 by a suitable adhesive.
  • a retaining means in this embodiment of the invention provided by a plurality of parallel spaced apart elongated retaining ridges 25 extend from the abutment surfaces 23 of the respective first and second anchor plates 21 and 22 and define troughs 26 for retaining the adhesive between the abutment surfaces 23 and the corresponding surface of the adjacent one of the inner and outer formwork panels 4 and 5.
  • Reinforcing webs 27 extend between the shank 10 and the respective first and second anchor plates 21 and 22.
  • Each connector 10 comprises a first engagement means provided by a first clip 30 for engaging an adjacent horizontal rod 17 of the first reinforcing panel 14 and for securing the connector 12 to the first reinforcing panel 14, and a second engagement means, namely, a second clip 31 for engaging an adjacent horizontal rod 17 of the second reinforcing panel 15 for securing the connector 10 to the second reinforcing panel 15.
  • the first and second clips 30 and 31 are located spaced apart along the shank 20, so that the corresponding horizontal rods 17 of the first and second reinforcing panels 14 and 15 are engaged by the first and second clips 30 and 31 , respectively, with the first and second reinforcing panels 14 and 15 spaced apart from the abutment surfaces 23 of the first and second anchor plates 21 and 22, so that in turn the first and second reinforcing panels 14 and 15 are spaced apart at the desired distance from each other, and from the inner and outer formwork panels 4 and 5.
  • the first clip 30 of each connector 10 comprises a first engagement member, namely, a first engagement leaf 33 which is resiliently carried on a first carrier means provided by a first resilient carrier leaf 34 extending from the first anchor plate 21.
  • the first engagement leaf 33 is formed by a return extending from the first carrier leaf 34, and is resiliency urged by the first carrier leaf 34 towards a corresponding engagement portion 35 formed on the shank 20 adjacent the first anchor plate 21 , and the first engagement leaf 33 defines with the engagement portion 35 a first slot 36 extending substantially parallel to the shank 10 for engaging and retaining the adjacent horizontal rod 17 of the first reinforcing panel 14 therein.
  • a plurality of spaced apart parallel first elongated gripping ridges 38 are provided on the first engagement leaf 33 and on the engagement portion 35 of the shank 20 for facilitating gripping and retaining the adjacent horizontal rod 17 of the first reinforcing panel 14 in the first clip 30.
  • the first gripping ridges 38 also facilitate pivoting of the connector 12 on the adjacent horizontal rod 17 of the first reinforcing panel 14 for in turn facilitating engagement of the connectors 10 with the first and second reinforcing panels 14 and 15, as will be described in more detail below.
  • a tapered lead-in 39 is formed on the first engagement leaf 33 adjacent the first carrier leaf 34 for accommodating the adjacent horizontal rod 17 of the first reinforcing panel 14 into the first slot 36.
  • the second clip 31 of each connector 10 comprises a pair of second engagement members, namely, second spaced apart engagement leaves 40 which are resiliently carried on corresponding second carrier means provided by second resilient carrier leaves 42 which extend radially from the shank 20 adjacent the second anchor plate 22.
  • the second engagement leaves 40 are formed by returns extending from the respective second carrier leaves 42 and are resiliently urged towards each other by the second carrier leaves 42 and define a second slot 43 therebetween extending substantially perpendicularly to the shank 20 for engaging and retaining the adjacent horizontal rod 17 of the second reinforcing panel 15 therein.
  • the resilient mounting of the second engagement leaves 40 ensures that the adjacent horizontal rod 17 of the second reinforcing panel 15 is securely retained in the second slot 43.
  • a plurality of parallel spaced apart second elongated gripping ridges 44 are provided on the second engagement leaves 40 for gripping and retaining the adjacent horizontal rod 17 of the second reinforcing panel 15 in the second slot 43.
  • the ends of the second engagement leaves 40 adjacent their connection to the corresponding second carrier leaves 42 are tapered at 45 to form a tapered lead-in into the second slot 43 for accommodating the adjacent horizontal rod 17 of the second reinforcing panel 15 into the second clip 31.
  • each connector 10 can be readily easily assembled to the first and second reinforcing panels 14 and 15.
  • each connector 10 can be connected to the reinforcing panels 14 and 15 by initially engaging the adjacent horizontal rod 17 of the first reinforcing panel 14 with the first clip 30 with the connector 10 angled slightly upwardly from the corresponding horizontal rod 17 of the first reinforcing panel 14, see Fig. 8, and then urging the connector 10 downwardly in the direction of the arrow A as illustrated in Fig.
  • the formwork assembly 1 is to accommodate a window and a door, neither of which are shown, and accordingly, a window opening 48 and a door opening 49 are formed in the inner and outer formwork panels 4 and 5, and window and door openings 50 and 51 , respectively, are formed in the first and second reinforcing panels 14 and 15 for accommodating the window and door (not shown).
  • a lower portion 54 of the inner and outer formwork panels 4 and 5 extending across the door openings 49 is retained in the inner and outer formwork panels 4 and 5.
  • the lower portions 54 of the inner and outer framework panels 4 and 5 are subsequently severed from the corresponding ones of the inner and outer formwork panels 4 and 5 with a suitable masonry saw when the wall 2 has been completed.
  • a reinforcing sub-assembly 55 also according to the invention comprising the first and second reinforcing panels 14 and 15 and the connectors 10 is initially constructed, see Fig. 2.
  • the first and second reinforcing panels 14 and 15 are arranged parallel to each other and spaced apart from each other at the appropriate spacing, as illustrated in Fig. 8.
  • the connectors 10 are then assembled to the first and second reinforcing panels 14 and 15 for securing and retaining the first and second reinforcing panels 14 and 15 parallel to each other and at the appropriate spacing.
  • the connectors are secured to adjacent ones of the horizontal rods 17 of the first and second reinforcing panels 14 and 15 adjacent the weld joints 18.
  • the connectors 10 are secured to the first and second reinforcing panels in the rows 13 and columns 19 with the spacing between the connectors 10 in the respective rows 13 and columns 19 at 200mm.
  • Each connector 10 is assembled to the first and second reinforcing panels 14 and 15 by initially engaging the corresponding horizontal rod 17 adjacent the appropriate weld joint 18 of the first reinforcing panel 14 by the first clip 30 and securing the first clip 30 to the corresponding horizontal rod 17 with the connector 10 inclined slightly upwardly from the horizontal rod 17, see Fig. 8, so that the second clip 31 clears the corresponding horizontal rod 17 of the second reinforcing panel 15.
  • the connector 10 With the first clip 30 secured to the corresponding horizontal rod 17 of the first reinforcing panel 14 adjacent the corresponding weld joint 18, the connector 10 is then pivoted downwardly in the direction of the arrow A, see Fig. 8, about the corresponding horizontal rod 17 of the first reinforcing panel 14 until the second dip 31 engages the corresponding horizontal rod 17 of the second reinforcing panel 15 is engaged in the second slot 43. The connector 10 is further urged downwardly in the direction of the arrow A until the corresponding horizontal rod 17 adjacent the corresponding weld joint 18 of the second reinforcing panel 15 has been fully engaged in the second clip 31. When all the connectors 10 have been secured by the respective first and second clips 30 and 31 to the corresponding horizontal rods 17 of the first and second reinforcing panels 14 and 15, assembly of the reinforcing sub-assembly 55 is completed.
  • the outer formwork panel 5 is bonded to the reinforcing sub-assembly 55 prior to bonding of the inner formwork panel 4.
  • Adhesive is applied to the abutment surfaces 23 of the second anchor plates 22 of the connectors 10, and the outer formwork panel 5 is offered up and aligned with the reinforcing sub-assembly 55 and is brought into engagement with the abutment surfaces 23 of the second anchor plates 22 and appropriate pressure is applied to the outer formwork panel 5 to ensure bonding of the outer formwork panel 5 to the second anchor plates 22.
  • Cable conduits 57, air ducts, water supply pipes, drainpipes and the like (none of which are shown) which are to be concealed within the wall 2 are then placed in the partially assembled formwork assembly 1 , as are socket boxes 58 and switch boxes 59 which are located in the reinforcing sub-assembly 55, see Fig. 5, to align with corresponding socket box and switch box openings 60 and 61 in the inner formwork panel 4, see Fig. 1.
  • Adhesive is then applied to the abutment surfaces 23 of the first anchor plates 21 of the connectors 10, and the inner formwork panel 4 is offered up to and aligned with the reinforcing sub-assembly 55 and urged into engagement with the abutment surfaces 23 of the first anchor plates 21 of the connectors 10.
  • the formwork assembly 1 When the adhesive has cured the formwork assembly 1 is ready for use and is transported to site. The formwork assembly 1 is then lifted onto a floor slab or a foundation of a building, and is secured by suitable support struts extending between the inner or outer formwork panels 4 and 5 or both and the floor slab or foundation. A cementitious mixture, which typically, is concrete is then poured into the void 11 between the inner and outer formwork panels 4 and 5 and is allowed to cure in order to form the wall 2 as a solid wall with the inner and outer formwork panels 4 and 5 forming the inner and outer surfaces 7 and 8, respectively, of the wall 2.
  • a cementitious mixture which typically, is concrete is then poured into the void 11 between the inner and outer formwork panels 4 and 5 and is allowed to cure in order to form the wall 2 as a solid wall with the inner and outer formwork panels 4 and 5 forming the inner and outer surfaces 7 and 8, respectively, of the wall 2.
  • the wall 2 should support a cast in-situ floor 64, as for example is illustrated in Fig. 12, prior to pouring the concrete into the void 11 , decking 65 is provided for supporting a cast in-situ floor 64, and floor reinforcing (not shown), typically, weld-mesh is located over the decking 65 and spaced apart therefrom.
  • the reinforcing sub-assembly 55 in the formwork assembly 1 is tied in with the floor reinforcing so that the wall 2 and the floor 64 when cast form a single integral construction.
  • Other services such as cable conduits, ducts, pipes and the like, which are to be located in the floor 64 are laid over the decking 65.
  • a connector according to another embodiment of the invention indicated generally by the reference numeral 70.
  • the connector 70 is substantially similar to the connector 10 and similar components are identified by the same reference numerals.
  • the only difference between the connector 70 and the connector 1 is that the shank 20 is formed in two parts, namely, a first part 71 which extends from the first anchor plate 21 and a second part 72 which extends from the second anchor plate 22.
  • the first and second parts 71 and 72 are coupleable to provide for adjustment of the length of the shank 20 for in turn facilitating adjustment of the spacing between the anchor plates 20 and 21 , and in turn the inner and outer formwork panels 4 and 5, as well as the spacing between the first and second reinforcing panels 14 and 15.
  • the first part 71 terminates in a female coupling element, namely, a socket 75 having an axially extending bore 76 extending therein.
  • the second part 72 terminates in a male coupling element 77 formed by a plug 78 extending from the second part 72.
  • the plug 78 is provided with a plurality of ones of respective pairs of interengageable complementary members, namely, circumferentially extending ridges 79 for engaging the others of the pairs of interengageable complementary members, namely, corresponding circumferentially extending recesses 80 in the bore 76 of the socket 75 with a snap-fit action.
  • the ridges 79 and recesses 80 are shaped to facilitate entry of the plug 78 into the bore 76, and to prevent disengagement of the plug 78 from the bore 76 once the appropriate number of ridges 79 have engaged the corresponding number of recesses 80 in the bore 76.
  • the shank 20 can be set at the desired length for spacing the first and second anchor plates 20 and 21 at the desired spacing and for spacing the first and second clips 30 and 31 at the desired spacing.
  • the connector 70 is similar to the connector 10, and its use is likewise similar.
  • the connectors according to the invention have been described as comprising first and second engagement means for engaging respective reinforcing panels, in certain cases it is envisaged that the connectors may be provided without the first and second engagement means, and in certain cases, it is envisaged that the connectors may be provided with only one engagement means if only a single reinforcing panel is required in the wall. Needless to say, the number of engagement means for engaging corresponding reinforcing panels will be dependent upon the number of reinforcing panels to be provided in the wall.
  • reinforcing panels have been described as being of weld-mesh, reinforcing panels of any other suitable reinforcing material may be used.
  • anchor plates of the connectors have been described as being provided with reinforcing webs, in certain cases, it is envisaged that the reinforcing webs may be omitted, or other suitable reinforcing arrangements reinforcing the joint between the anchor plates to the shank may be provided.
  • first and second formwork panels have been described as being of fibre board, which are panels of cement reinforced with timber fibres
  • the inner and outer formwork panels may be of any other suitable material, and where the panels are of fibre board, the reinforcing fibres of the cement panel may be of any other suitable material, for example, glass fibres, acrylic fibres, fibres of plastics material and the like, or combinations of such fibres.
  • first and second formwork panels of other suitable materials may be used, and in general, such panels would be of a relatively lightweight material.
  • connectors of the formwork panels of the formwork assembly have been described as being arranged in a matrix which is defined by rows and columns of the connectors, and while the connectors have been described as being spaced apart a distance of approximately 200mm in the respective rows, other suitable spacings of the connectors in the respective rows and columns may be used. However, in general, it is envisaged that the spacing between the connectors in the respective rows and columns will not be greater than 350mm, and preferably, would not be greater than 300mm. In general, it is unlikely that the spacing of the connectors in the respective rows and columns would be less than 100mm.

Abstract

L'invention porte sur un ensemble de coffrage (1) pour une utilisation dans la construction d'un mur coulé sur place (2), qui comprend un panneau de coffrage interne (4) et un panneau de coffrage externe (5), qui par la suite définissent des surfaces interne et externe (7, 8) du mur coulé sur place (2). Un sous-ensemble de renforcement (55) comprenant une paire de premier et second panneaux de renforcement espacés (14, 15) du treillis soudé, est situé dans un espace vide (11) défini entre les panneaux de coffrage interne et externe (4, 5). Les premier et second panneaux de renforcement (14, 15) sont maintenus en parallèle et séparés l'un de l'autre par des connecteurs (10) auxquels les panneaux de coffrage interne et externe (4, 5) sont liés. Chaque connecteur (10) comprend une tige (20) s'étendant entre les premier et second patins de scellement (21, 22) auxquels les panneaux de coffrage interne et externe (4, 5) sont liés. Des première et seconde agrafes (30, 31) situées sur la tige (20) de chaque connecteur (10) fixent les connecteurs (10) aux premier et second panneaux de renforcement (14, 15) et maintiennent les premier et second panneaux de renforcement (14, 15) séparés l'un de l'autre et aussi séparés des panneaux de coffrage interne et externe (4, 5).
PCT/IE2008/000082 2007-08-29 2008-08-29 Connecteur pour connecter une paire de panneaux de coffrage espacés, ensemble de coffrage et procédé pour construire un ensemble de coffrage WO2009027960A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IES2007/0615 2007-08-29
IE20070615 2007-09-29

Publications (1)

Publication Number Publication Date
WO2009027960A1 true WO2009027960A1 (fr) 2009-03-05

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Country Status (2)

Country Link
IE (1) IES20080702A2 (fr)
WO (1) WO2009027960A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITRM20110238A1 (it) * 2011-05-13 2012-11-14 Giovanni Cenci Metodo per la costruzione di casseri coibentati per il contenimento di calcestruzzo gettato in opera per realizzare pareti in cemento armato, e mezzi per la sua attuazione
WO2020169811A1 (fr) * 2019-02-22 2020-08-27 Mackencore Uk Limited Coffrage perdu
WO2021014160A1 (fr) * 2019-07-23 2021-01-28 Ronald Miller Appareil d'ancrage d'un module de formation de dalle plate à vides à un coffrage à l'aide d'un cadre d'armature
WO2023031208A1 (fr) * 2021-08-30 2023-03-09 Ibt Innovative Building Technologies Gmbh Système d'ancrage à disque pour l'ancrage adhésif de plaques d'un système de coffrage de mur, système de coffrage de mur, mur, utilisation d'un système de coffrage de mur pour la production d'une structure et procédé de production d'une structure

Citations (7)

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Publication number Priority date Publication date Assignee Title
DE7625460U1 (de) * 1976-08-13 1980-03-13 Hering, Peter, 6229 Erbach Fertigbauelement
DE3407867A1 (de) * 1984-03-02 1985-09-05 Paul Ensle Stiftung & Co KG, 7100 Heilbronn Fertigbau-wandelement
DE19618840A1 (de) * 1996-05-10 1997-11-13 Dieter Rausch Abstandhalter
DE19823346A1 (de) * 1997-07-22 1999-01-28 Bui Bender Tocong Dipl Ing Querverbinder aus Kunststoff für die Mantelbetonbauweise
WO1999007958A1 (fr) * 1997-08-05 1999-02-18 Nemis Establishment Espaceur
EP1036891A1 (fr) * 1999-03-01 2000-09-20 Gabriele Raschke Système préfabriqué composite pour la réalisation de murs interieurs ou exterieurs de bâtiments
DE20205592U1 (de) * 2001-04-11 2002-07-25 Classen Thomas Schalungsabstandshalter

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE7625460U1 (de) * 1976-08-13 1980-03-13 Hering, Peter, 6229 Erbach Fertigbauelement
DE3407867A1 (de) * 1984-03-02 1985-09-05 Paul Ensle Stiftung & Co KG, 7100 Heilbronn Fertigbau-wandelement
DE19618840A1 (de) * 1996-05-10 1997-11-13 Dieter Rausch Abstandhalter
DE19823346A1 (de) * 1997-07-22 1999-01-28 Bui Bender Tocong Dipl Ing Querverbinder aus Kunststoff für die Mantelbetonbauweise
WO1999007958A1 (fr) * 1997-08-05 1999-02-18 Nemis Establishment Espaceur
EP1036891A1 (fr) * 1999-03-01 2000-09-20 Gabriele Raschke Système préfabriqué composite pour la réalisation de murs interieurs ou exterieurs de bâtiments
DE20205592U1 (de) * 2001-04-11 2002-07-25 Classen Thomas Schalungsabstandshalter

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITRM20110238A1 (it) * 2011-05-13 2012-11-14 Giovanni Cenci Metodo per la costruzione di casseri coibentati per il contenimento di calcestruzzo gettato in opera per realizzare pareti in cemento armato, e mezzi per la sua attuazione
WO2020169811A1 (fr) * 2019-02-22 2020-08-27 Mackencore Uk Limited Coffrage perdu
WO2021014160A1 (fr) * 2019-07-23 2021-01-28 Ronald Miller Appareil d'ancrage d'un module de formation de dalle plate à vides à un coffrage à l'aide d'un cadre d'armature
GB2600665A (en) * 2019-07-23 2022-05-04 Miller Ronald Apparatus for anchoring a voided flat slab forming module to a formwork using a rebar frame
GB2600665B (en) * 2019-07-23 2024-03-06 Miller Ronald Apparatus for anchoring a voided flat slab forming module to a formwork using a rebar frame
WO2023031208A1 (fr) * 2021-08-30 2023-03-09 Ibt Innovative Building Technologies Gmbh Système d'ancrage à disque pour l'ancrage adhésif de plaques d'un système de coffrage de mur, système de coffrage de mur, mur, utilisation d'un système de coffrage de mur pour la production d'une structure et procédé de production d'une structure

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