EP4677167A1 - Raccord amélioré destine à être utilisé dans la formation de joints - Google Patents

Raccord amélioré destine à être utilisé dans la formation de joints

Info

Publication number
EP4677167A1
EP4677167A1 EP24769564.6A EP24769564A EP4677167A1 EP 4677167 A1 EP4677167 A1 EP 4677167A1 EP 24769564 A EP24769564 A EP 24769564A EP 4677167 A1 EP4677167 A1 EP 4677167A1
Authority
EP
European Patent Office
Prior art keywords
housing
enhanced connector
seal
enhanced
connector according
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
EP24769564.6A
Other languages
German (de)
English (en)
Inventor
Cameron HINTON
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SRG Global IP Pty Ltd
Original Assignee
SRG Global IP Pty Ltd
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
Priority claimed from AU2023900659A external-priority patent/AU2023900659A0/en
Application filed by SRG Global IP Pty Ltd filed Critical SRG Global IP Pty Ltd
Publication of EP4677167A1 publication Critical patent/EP4677167A1/fr
Pending legal-status Critical Current

Links

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
    • E04B1/38—Connections for building structures in general
    • E04B1/48—Dowels, i.e. members adapted to penetrate the surfaces of two parts and to take the shear stresses
    • E04B1/483—Shear dowels to be embedded in concrete
    • 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
    • E04B1/38—Connections for building structures in general
    • E04B1/41—Connecting devices specially adapted for embedding in concrete or masonry
    • E04B1/4114—Elements with sockets
    • 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
    • E04B1/62—Insulation or other protection; Elements or use of specified material therefor
    • E04B1/66—Sealings
    • E04B1/68—Sealings of joints, e.g. expansion joints
    • E04B1/6801—Fillings therefor
    • 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
    • E04B1/62—Insulation or other protection; Elements or use of specified material therefor
    • E04B1/66—Sealings
    • E04B1/68—Sealings of joints, e.g. expansion joints
    • E04B1/6812—Compressable seals of solid form
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
    • E04C5/08—Members specially adapted to be used in prestressed constructions
    • E04C5/12—Anchoring devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B13/00—Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose
    • F16B13/14—Non-metallic plugs or sleeves; Use of liquid, loose solid or kneadable material therefor
    • F16B13/141—Fixing plugs in holes by the use of settable material
    • 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
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
    • E04F15/00—Flooring
    • E04F15/12—Flooring or floor layers made of masses in situ, e.g. seamless magnesite floors, terrazzo gypsum floors
    • E04F15/14—Construction of joints, e.g. dividing strips
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B11/00—Connecting constructional elements or machine parts by sticking or pressing them together, e.g. cold pressure welding
    • F16B11/006—Connecting constructional elements or machine parts by sticking or pressing them together, e.g. cold pressure welding by gluing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B13/00—Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose
    • F16B2013/006—Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose with sealing means

Definitions

  • the invention relates to an enhanced connector for use in forming joints.
  • the invention is particularly suited for use in connecting portions of a post-tensioned concrete structure, such as floor slabs, in a manner that allows the portions to move relative to each other as occurs during settling of the portions.
  • Post-tensioning is a technique used in the construction of buildings, particularly those where the floors of the building are intended to have long spans uninterrupted by vertical pillars.
  • PT involves reinforcing (strengthening) concrete or other materials with high strength steel strands or bars. These strands and bars are generally referred to as tendons.
  • the section or slabs may move relative to the adjacent, previously cured and settled, slabs.
  • the joint operates to allow temporary release of restraining effects of the various sections relative to one another and thus ensure that the maximum amount of PT pre-compression force is transferred into the floor plates. If insufficient PT pre-compression force is transferred into the floor plates there exists the possibility of cracking within the sections or slabs. A cracked slab has reduced longevity and adversely impacts on the integrity of the resulting floor plate of which it forms part.
  • an air gap may be formed which leaves both the temporary movement joint and at least part of the tendon exposed to the atmosphere and thus subject to corrosion and the like until sealed.
  • a consequence of the first problem is that prior art temporary movement joints must be made from corrosion resistant materials, such as stainless steel. When combined with the fact that the materials must also be fire resistant or incorporate other attributes to meet building regulations, the cost of manufacturing such temporary movement joints may be up to ten times higher than the cost of manufacturing from less exotic materials.
  • the second problem presents a situation where the temporary movement joint is not adequately strengthened or that sealant may be lost from the joint. In both cases, a workman is then required to caulk the temporary movement joint at a later date and thus ensure that the temporary movement joint is properly sealed and thereby locked in place. This requirement for remedial action is timeconsuming and expensive in addition to delaying completion of the building.
  • an enhanced connector for use in forming a joint between a first concrete slab and a second concrete slab, the enhanced connector comprising: a housing opening onto a sealing chamber; and a bellows seal securely connected at one end to the sealing chamber and at the other end connected to at least a central seal, where, the central seal has an internal side with a concave channel and a tapered side wall such that when grouted, the concave channel fills with grout and causes the tapered side wall to partly deform and seal against a dowel bar.
  • the enhanced connector may also include an inner plate and an outer plate, where the inner plate and the outer plate each having an inner periphery and an outer periphery and where when the inner plate is securely connected to the outer plate, the central seal is interposed therebetween at the inner periphery and the one end of the bellows seal is securely retained therebetween at the outer periphery.
  • the outer plate may have at least one external aperture provided therein, the at least one external aperture opening up into an annular void that surrounds the interposed central seal.
  • the inner plate may have an angled base disc.
  • the inner plate may have a side wall, the side wall having an angular underside section.
  • the bellows seal is preferably connected to the sealing chamber at one end by way of a snap ring.
  • the housing may have at least one spine having a plurality of ribs extending therefrom, each rib tapering in width as it extends away from the spine. Ideally, the distance between the rib at its point of connection to the spine and the housing is at least 20mm. In a further preferred arrangement, each rib’s tapered end is spaced from its adjacent rib’s tapered end in an elongated manner.
  • the housing may have a plurality of cut-outs provided therein and a separate grout egress chamber, the shear box having a weir plate extending therefrom and where, when the shear box is located in the cut-outs, the weir plate defines an opening between the sealing chamber and the grout egress chamber.
  • the enhanced connector may be used with a reinforcing helix, the reinforcing helix operable to surround the portion of the housing that opens onto the sealing chamber.
  • the reinforcing helix is secured to the housing by way of a retailing clip.
  • the reinforcing helix may have a dimpled surface.
  • the distance between coils of the reinforcing helix and the housing is at least 25 mm.
  • a method of forming a joint between a first concrete slab and a second concrete slab comprising the steps of: installing an enhanced connector according to the first aspect of the present invention in concrete that sets to form the first concrete slab; inserting one end of a dowel bar into the enhanced connector by way of the tapered side wall, the non-inserted end of the dowel bar extending into the area in which the second concrete slab is to be formed; pouring a second concrete slab about the non-inserted end of the dowel bar; pumping grout through the internal area of the housing and sealing chamber, the pumped grout operable to deform the concave channel and deform the tapered side wall to partly deform and seal against the dowel bar.
  • a method of forming a joint between a first concrete slab and a second concrete slab comprising the steps of: installing in concrete that sets to form the first concrete slab an enhanced connector according to the first aspect of the present invention incorporating an annular void surrounding the central seal; inserting one end of a dowel bar into the enhanced connector by way of the tapered side wall, the non-inserted end of the dowel bar extending into the area in which the second concrete slab is to be formed; pouring concrete to form a second concrete slab about the non-inserted end of the dowel bar, at least part of the concrete poured in a manner that it entered the annular void surrounding the interposed central seal. pumping grout through the internal area of the housing and sealing chamber, the pumped grout operable to deform the concave channel and deform the tapered side wall to partly deform and seal against the dowel bar.
  • the method of the second or third aspect of the invention may further include the step of positioning a reinforcing helix so as to surround a portion of the housing that opens onto the sealing chamber.
  • An optional sub-step of the method is to position the reinforcing helix such that the distance between coils of the reinforcing helix and the portion of the housing that opens onto the sealing chamber is at least 25mm.
  • Either method may further include the step of connecting the reinforcing helix to the housing by way of a retaining clip.
  • Figure 1 is an exploded view of a first embodiment of an enhanced connector for use in forming joints.
  • Figure 2 is an internal view of the lower half of the enhanced connector as shown in Figure 1 with a dowel bar provided therein.
  • Figure 3 is a partial perspective view of the rear of the enhanced connector as shown in Figure 1.
  • Figure 4 is a cross-sectional view of part of the enhanced connector as shown in Figure 1.
  • Figure 5 is a front plan view of the enhanced connector as shown in Figure 1 without the seal plate installed therein.
  • Figure 6 is a perspective view of a shear box as used in the enhanced connector shown in Figure 1.
  • Figures 7A and 7B are a perspective and plan view of a bellows seal as used in the enhanced connector shown in Figure 1 .
  • Figure 8 is an exploded view of a seal plate as used in the enhanced connector shown in Figure 1.
  • Figure 9 is a cross-sectional view of an assembled seal plate with bellows seal attached thereto.
  • Figure 10 is an exploded view of a second embodiment of an enhanced connector for use in forming joints.
  • Figure 11 is a partial perspective view of the enhanced connector shown in Figure 10 as assembled.
  • Figure 12 is flowchart of a method of forming a joint between a first concrete slab and a second concrete slab in accordance with the second aspect of the invention
  • Figure 13 is a flowchart of a method of forming a joint between a first concrete slab and a second concrete slab in accordance with the third aspect of the invention.
  • the enhanced connector 10 for use in forming joints.
  • the enhanced connector 10 comprises:
  • the upper body half 12 and the lower body half 1 clip together to form an open-ended housing 20.
  • a body “O”-ring seal 22 is designed to be sandwiched between the upper body half 12 and the lower body half 14 when clipped together to provide a pressure seal against grout leakage from within.
  • the housing 20 has a sealing end 24 and a rear end 26 and is substantially cylindrical in shape.
  • the housing 20 is open at its sealing end 24.
  • the length (L) of the housing 20 corresponds with the length of a portion of a sleeved dowel bar 1 . This will be described in more detail below.
  • the upper body half 12 has a rectangular cut-out 28a proximate sealing end 24. Located proximate the cut-out 28 is a grout egress chamber 30. Protruding from the grout egress chamber 30 is a first grout spigot 32a. The first grout spigot 32a protrudes in a direction transverse to the length (L) of the housing 20.
  • Each grout spigot 32a, 32b acts as a fluid conduit between the internal area of the housing 20 and the external environment.
  • the lower body half 14 has a rectangular cut-out 28b proximate sealing end 24.
  • the rectangular cut-outs 28a, 28b are in alignment with one another.
  • the rear end 26 of the lower body half 14 forms a support portion 34.
  • a pair of locating tabs 36 are provided internal to the support portion 34. Each locating tab 36 is positioned so as to angle towards the rear end 26.
  • the locating tabs 36 are made of a deformable material.
  • Locating slots 38a, 38b are provided in external surface 40 of the support portion 34. Locating slot 38a is of size and shape to receive a bar chair (not shown). Locating slot 38b is of size and shape to receive a reinforcing bar (not shown). Locating slot 38a opens out into locating slot 38b.
  • each rib 44 Extending longitudinally between the support portion 34 and each rectangular cut-out 28a, 28b is a spine 42. Extending from the spine 42 are a plurality of ribs 44. Each rib 44 extends towards securing means 46. Each rib 44 is wider at its point of connection to spine 42 than at its connection to securing means 46. A portion of each rib 44 is internal to the housing 20.
  • each rib 44 acting as the crest of a wave.
  • the crest of each wave must be pronounced (i.e. the distance between the rib 44 and its “trough” must be at least 20mm) and the wavelength between crests elongated. The reason for this will be explained in more detail below.
  • the securing means 46 comprises a first flange 48a extending around the upper perimeter 50 of the lower body half 14.
  • the first flange 48a has a plurality of clips 52 extending therefrom. Adjacent the first flange 48a is a lip 54. The lip 54 facilitates positioning of the body “O”-ring seal 22.
  • the securing means 46 further comprises a second flange 48b extending around the lower perimeter 56 of the upper body half 12.
  • the second flange 48b has a plurality of clip recesses 58 provided therein.
  • Each clip recess 58 is of size and dimension to receive a clip 52 therein with tight tolerances.
  • the body “O”-ring seal 22 is sandwiched between flanges 48a, 48b.
  • the sealing end 24 opens onto a sealing chamber 60.
  • the sealing chamber 60 is cylindrical in shape. The diameter of the sealing chamber 60 is significantly greater than the diameter of the housing 20.
  • the opening between the sealing chamber 60 and housing 20 has a rectangular oval in shape. A section of this opening has a passage 62 extending therefrom. The passage 62 opens onto the grout egress chamber 30.
  • Circling the opening are a plurality of centralising tabs 64 and holding clips 66.
  • the centralising tabs 64 are located above and below the opening.
  • the holding clips 66 are located to the sides of the opening. In this embodiment, there are four holding clips 66.
  • each centralising tab 64 and the opening Extending between each centralising tab 64 and the opening is a ramp segment 68.
  • Each ramp segment 68 is higher at the opening end 70 than at the centralising tab 64 end.
  • the width of each ramp segment 68 is substantially equal to the rectangular sides of the opening.
  • a securing recess 74 Extending around the inner periphery 72 of the sealing chamber 60 is a securing recess 74.
  • the sealing chamber 60 has a front edge 76. Surrounding the front edge 76 is a face plate 78. The face plate 78 is square in shape, with the sealing chamber 60 forming an aperture therein.
  • Each corner of the face plate 78 takes the form of a triangular frangible tab 80.
  • Each frangible tab 80 has a hole 82 provided therein. The role of the frangible tab 80 will be described in more detail below.
  • the shear box 16 takes the form of a polymer sleeve having a rectangular oval shape when viewed in cross-section. In this manner, the size and shape of the shear box 16 is such as to match that of the opening between the sealing chamber 60 and housing 20. [0049] A rectangular insert 84 extends from rectangular sides 86 of the shear box 16. Each rectangular insert 84 is of size and shape as to fit into the space created by its respective cut-out 28a, 28b with tight tolerances.
  • each lip 90 has a profile similar to that of an underside 94 of a ramp segment 68.
  • the weir plate 92 extends from the shear box 16 in a plane parallel to the front face 88.
  • the weir plate 92 is reinforced by a brace 96.
  • the size and shape of the weir plate 92 is such so as to allow it to be received within, and block part of the lower section of, passage 62. In doing so, the weir plate 92 defines a grout flow aperture 98.
  • the sealing means 18 comprises a bellows seal 100, a snap ring 102 and a seal plate 104.
  • the bellows seal 100 is shown in Figures 7A and 7B.
  • the bellows seal 100 is made of a resilient material.
  • the bellows seal 100 is made from rubber.
  • the bellows seal 100 comprises an inner rim 106, an outer rim 108 and a bridging portion 110.
  • Each of the inner rim 106, outer rim 108 and bridging portion 110 has a hollow circular profile.
  • the outer diameter of the outer rim 108 is greater than the outer diameter of the inner rim 106 and the bridging portion 110.
  • the outer diameter of the inner rim 106 is greater than the outer diameter of the bridging portion 110.
  • Each of the inner rim 106, outer rim 108 and bridging portion 110 are concentrically aligned.
  • a similar lip 114 is provided on the inner diameter of the inner rim 106.
  • the inner rim 106 has a “C”-shaped profile when viewed in crosssection. This, in combination with the bridging portion 110, gives the complete bellows seal 100 a sinusoidal cross-sectional profile as shown in Figure 9.
  • the snap ring 102 has a hollow circle shape.
  • the outer diameter of the snap ring 102 is equal to the outer diameter of the outer rim 108.
  • the width (W) of the snap ring 102 is slightly less than the width of the securing recess 74.
  • the height of the snap ring 102 is slightly larger than the height of the securing recess 74.
  • the seal plate 104 comprises an inner plate 116, an outer plate 118 and a centre seal 120.
  • Each of the inner plate 116, outer plate 118 and centre seal 120 has a hollow circle shaped profile.
  • the outer diameter of the outer plate 118 is slightly greater than the outer diameter of the inner plate 116.
  • the outer diameter of the inner plate 116 is greater than the outer diameter of the centre seal 120.
  • Each of the inner plate 116, outer plate 118 and seal 120 has the same inner diameter.
  • the inner plate 116 comprises an angled base disc 122 having a side wall 124 extending about its periphery 126.
  • the side wall 124 has an angled underside section 127. The role of the angled underside section 127 will be described in more detail below.
  • a locating recess 130 Adjacent the inner diameter 128 of the base disc 122 is a locating recess 130. Surrounding the locating recess 130 are four first retainer clips 132. Each first retainer clip 132 is substantially equidistant from its adjacent retainer clips 132.
  • each positioning wall 134 extends around approximately a quarter of the side wall 124.
  • a second retainer clip 136 is aligned with the gap between each positioning wall 134.
  • each second retainer clip 136 is effectively positioned mid-turn relative to each first retainer clip 132.
  • Each second retainer clip 136 is substantially equidistant from its adjacent second retainer clips 136.
  • Each of the first retainer clips 132 and second retainer clips 136 has a clip portion 138.
  • the clip portion 138 of the first retainer clips 132 face inwards.
  • the clip portion 138 of the second retainer clips 136 face outwards.
  • the outer plate 118 has a projection 140 extending therefrom.
  • the height (H) of the projection 140 is substantially the same as the height of the centre seal 120.
  • a plurality of clip apertures 142 are formed in the inner plate 118 and arranged so as to surround the projection 140.
  • the centre seal 120 is made from a resilient material.
  • the resilient material is rubber.
  • the centre seal 120 has a front side 144a and a rear side 144b.
  • the internal surface 146 connecting the front side 144a with the rear side 144b is tapered. In this manner, the width of the centre seal 120 at the front side 144a is smaller than the width of the centre seal 120 at the rear side 144b. See Figure 9.
  • the rear side 144b also has a concave channel 148 provided therein.
  • the concave channel 148 is shown in more detail in Figure 9. The role of the concave channel 148 will be described in more detail below.
  • the lower body half 14 is propped on a flat surface (not shown) and the shear box 16 inserted such that the rectangular insert 84 is received within cut-out 28b. In this alignment, the weir plate 92 projects away from the surface.
  • the body “O”-ring seal 22 is then installed into the lip 54 as it extends about the lower body half 14 and the lower segment of the sealing chamber 60. Once installed, the upper body half 12 is aligned over the top of the lower body half 14.
  • each clip 52 moves out of the way of the second flange 48b until it is able to spring back into place.
  • the clip 52 springs back into place, it is retained in this position by a clip recess 58. This results in the “O”-ring seal 22 being sandwiched between the flanges 48.
  • the seal plate 104 is then formed by placing the centre seal 120 on the inner plate 116. When properly placed, the outer diameter of the centre seal 120 makes contact with the locating recess 130. [0074] The inner rim 106 of the bellow seal 100 is then placed over the inner plate 116 such that lip 114 is received within the space between the side wall 124 and positioning walls 134. Once so positioned, the outer plate 118 is then securely connected to the inner plate 116.
  • the outer plate 118 securely connects to the inner plate 116 in two ways. Firstly, the clip portion 138 of the first retainer clips 132 are received within slot apertures 150 located in the projection 140. Secondly, the second retainer clips 136 extend through the clip apertures 142 with the clip portion 138 ultimately hooking over an outer side 152 of each clip aperture 142.
  • the bellows seal 100 with assembled seal plate 104 connected thereto, is then inserted into the sealing chamber 60. Proper positioning of the bellows seal 100 is achieved when the assembled seal plate 104 snaps into place with respect to each of the centralising tabs 64 and holding clips 66. When properly positioned, lip 112 correlates with securing recess 74.
  • the bellow seal 100 is then retained in place within the sealing chamber 60 by the snap ring 102.
  • the snap ring 102 is aligned with securing recess 74 and then pressed therein.
  • the outer rim 104 is also pressed therein.
  • the presence of the snap ring 102 and the outer rim 104 results in an interference fit being formed with the securing recess 74, thus preventing the bellow seal 100 from pulling free during normal use.
  • the connector 10 is used in creating a joint between floor slabs as described below.
  • Formwork for the first slab is created as per normal (not shown).
  • the enhanced connector 10 is then installed to the inner face of this formwork. Installation is achieved by drilling Tek screws through holes 82 in the frangible tabs 80 and into the formwork. If needed to ensure that the enhanced connector 10 is substantially level, either a bar chair (not shown) is placed into locating slot 38a or the enhanced connector 10 is propped on a reinforcing bar (not shown) by way of locating slot 38b.
  • An ingress grout tube (not shown) is then connected to the second grout spigot 32b.
  • An egress grout tube (not shown) is then connected to the first grout spigot 32a. It is to be noted that the egress grout tube for one enhanced connector 10 may also be an ingress grout tube for another enhanced connector 10.
  • the concrete which will ultimately form the first slab is then poured so as to encapsulate the enhanced connector 10. This concrete is then allowed to set before the formwork is removed. Removal of the formwork allows access to the seal plate 104.
  • the enhanced connector 10 maximises the surface area available to “grip” the settled concrete. This additional “grip” provides further assistance in preventing the enhanced connector 10 from pulling free of the settled concrete in a fire situation.
  • a dowel bar 1 having a smooth portion is then inserted through the seal 112 into the housing 20.
  • the tapered internal surface 146 of the seal 112 facilitates smooth insertion of the dowel bar 1 .
  • each rib 44 prevents significant misalignment of the dowel bar 1 as it is inserted into the housing 20. However, to prevent finer misalignment of the dowel bar 1 following installation, the angled configuration of the locating tabs 36 directs the end of the dowel bar 1 towards its expected original position at the rear end 26.
  • the smooth portion of the dowel bar 1 is aligned with the centre seal 120.
  • the end of the dowel bar 1 not received within the enhanced connector 10 may be propped up by a bar chair or reinforcing bar if so required.
  • the dowel bar 1 may be subject to pressures that may cause it to move laterally or longitudinally (vertical movement being effectively restrained by the combination of the ramp segments 68 and shear box 16). Regardless of the direction of movement, the bellows seal 100 acts to accommodate the movement, while the seal 112 remains sealed to the dowel bar 1 .
  • the ramp segments 68 operate to limit the vertical movement that may occur following telescopic movement of the dowel bar 1 .
  • the angled underside section 127 in combination with the angled base disc 122, operate to ensure that the sealing means 18 never shuts off the sealing chamber 60. This means that it is only the bellows seal 100 that is in direct contact with the sealing chamber 60. As a result, the grout fills in the internal annular void formed behind the inner plate 116/centre seal 120.
  • the lips 90 act to provide support to the dowel bar 1 . Additionally, the lips 90 act to minimise bending of the dowel bar 1 near the joint when transferring vertical shear force during in-service operation.
  • the shape of the ramp segments 68 permits the first slab concrete located over and under the connector 10 to be poured as close as possible to the joint face (i.e. the interface between first slab and second slab). This is important as the closer the first slab concrete is able to get to the joint face the smaller the width of the gap formed there.
  • a smaller gap width means a less likelihood of bending of the dowel bar 1 which increases the stiffness performance of the enhanced connector 10 under vertical shear loading.
  • the enhanced connector set 200 comprises the enhanced connector 10, a sleeved dowel bar 202 and a pair of reinforcing helixes 204.
  • the enhanced connector 10 as used in the enhanced connector set 200 is supplied in pre-assembled form with a sticker 206 covering the sealing chamber 60.
  • the sleeved dowel bar 202 comprises a ribbed dowel bar 208 and a thin walled steel sleeve 210.
  • the inner diameter of the sleeve 210 is equal to the diameter of the ribbed dowel bar 208.
  • the portion 212 of the housing 20 containing the shear box 16 is enlarged to match the width of the ribs 44. Extending from this portion 212 of the housing 20 is a retainer clip 214 for a reinforcing helix 204.
  • a reinforcing helix 204 is of size to just fit over the portion 212 of the housing 20.
  • the surface of the reinforcing helix 204 is dimpled.
  • the reinforcing helix 204 When retained by the retainer clip 214, the reinforcing helix 204 extends the full length of the portion 212 of the housing 20. Additionally, the reinforcing helix 204 makes contact with sides 216 of this portion 212 while leaving a gap of approximately 5mm (max) relative to the top and bottom of the portion 212.
  • the enhanced connector 200 is installed as described for the first embodiment with four modifications.
  • the first modification relating to this embodiment is that prior to pouring of the concrete that will form the first slab, a first reinforcing helix 204 is wound about the enhanced connector 200 from its rear end 26. This continues until such time as an end of the reinforcing helix 204 surrounds the portion 212. In this position, the first grout spigot 32a protrudes through the space between adjacent coils 218. The first reinforcing helix 204 is then retained in place by way of the retainer clip 21 .
  • the second modification is that once the formwork for the first slab has been removed, only the sticker 206 is exposed. The installer must then remove the sticker 206 to obtain access to the bellows seal 100 and the seal 112 for installation of the sleeved dowel bar 202.
  • the third modification is that the sleeve 210 is affixed centrally to the ribbed dowel bar 208 before insertion into the seal 112. When properly inserted, the seal 112 makes contact with the sleeve 210.
  • the final modification is that once the sleeved dowel bar 202 is properly inserted, a second reinforcing helix 204 is installed over the top thereof.
  • the remainder of the installation process of the components of the enhanced connector set 200 is as per the first embodiment of the invention.
  • the reinforcing helixes 204 act to significantly increase the vertical shear capacity of the enhanced connector 10, by tying together the upper and lower concrete strata. It is for this reason that the distance between coils of the reinforcing helix 204 must be at least 25mm. Any closer and the concrete poured to form the slab may not be able to pass through the reinforcing helix 204 or pass sufficiently through the reinforcing helix 204 to produce a quality slab.
  • a further advantage of these embodiments of the invention is that the recessed nature of the sealing means 18 relative to the sealing chamber 60, and the temporary securing of the front seal plate to the sealing chamber with holding clips has two benefits. The first is that it facilitates easy installation of the enhanced connector 10, 200 to formwork with no separate sealing components. The second is that the smaller overall size of the sealing chamber 60, relative to the applicant’s earlier products, allows for better stacking of the enhanced connectors 10, 200. This has value in that it allows more product to be packed into a single shipping container as well as allowing closer spacing of enhanced connectors (and thus allow for more load to be transferred across the joint when grouted).
  • the shear box 16 may be omitted. When so omitted, the housing 20 does not require rectangular cut outs 28.
  • the housing 20 need not be made into two separate parts, rather being made from an integrated whole.
  • the locating tabs 36 may be omitted.
  • the centralising tabs 64 and/or holding clips 66 may be omitted.
  • the ramp segments 68 may be omitted.
  • frangible tabs 80 may be omitted.
  • the lips 90 may also be omitted.
  • the weir plate 92 may be omitted. Alternatively, the weir plate 92 may be a separate component to the shear box 16 or form part of the housing 20.
  • Lips 112, 114 may be omitted.
  • Retainer clips 132 may be replaced with other means of securing the inner plate 118 to the outer plate 116.
  • the centre seal 120 need not be made from rubber. It may be made from other resilient material with similar sealing properties.
  • the centre seal include the concave channel 148, it should be appreciated that a channel of any cross-sectional profile may be used provided that, when grouted, the pressure applied by the grout allow the channel to deform to create an additional seal about the dowel bar.
  • the sticker 206 may be omitted, or replaced with another covering element such as a cap, or piece of fabric.
  • the surface of the reinforcing helix 204 need not be dimpled. In an alternative arrangement, the surface may be pitted.
  • the reinforcing helix 204 may be secured relative to the housing 20 by way of mechanisms other than the retaining clip 214.
  • the shape of the housing 20 may be configured to facilitate connection to the reinforcing helix 204.
  • the housing 20 may include a grout passage along its upper spine. The inclusion of such a grout passage may assist in removing air from the enhanced connector 10, 200 during grouting.
  • the ribbed dowel bar 208 may be replaced with a continuous threaded bar.
  • the snap ring 102 may be thickened in one section with the securing recess 74 having a similarly thickened section. In this manner, the snap ring 102 can only be properly installed when the thickened section of the snap ring 102 aligns with the thickened section of the securing recess 74.
  • annular void 150 to further assist in the sealing of the dowel bar 1 is preferred, it is not a necessary element of the invention.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Forms Removed On Construction Sites Or Auxiliary Members Thereof (AREA)
  • Building Environments (AREA)

Abstract

L'invention concerne un raccord amélioré (10, 200) destiné à être utilisé pour former un joint entre une première dalle de béton et une seconde dalle de béton qui est couverte par un goujon (1). Le raccord amélioré (10, 200) comprend un boîtier (12, 14) et un joint d'étanchéité de type à soufflet (100). Le boîtier (12, 14) débouche sur une chambre d'étanchéité (60). Le joint d'étanchéité de type à soufflet (100) est solidement relié à une extrémité à la chambre d'étanchéité (60) et à l'autre extrémité relié à au moins un joint central élastique (120). Le joint central (120) a un côté interne ayant un canal concave (148) et une paroi latérale conique (144). Lorsqu'il est groupé, le canal concave (148) se remplit de coulis et applique une pression sur la paroi latérale conique (144) pour se déformer et se sceller partiellement contre la barre de cheville (1).
EP24769564.6A 2023-03-10 2024-03-10 Raccord amélioré destine à être utilisé dans la formation de joints Pending EP4677167A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AU2023900659A AU2023900659A0 (en) 2023-03-10 Enhanced connector for use in forming joints
PCT/AU2024/050210 WO2024187226A1 (fr) 2023-03-10 2024-03-10 Raccord amélioré destine à être utilisé dans la formation de joints

Publications (1)

Publication Number Publication Date
EP4677167A1 true EP4677167A1 (fr) 2026-01-14

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ID=92754080

Family Applications (1)

Application Number Title Priority Date Filing Date
EP24769564.6A Pending EP4677167A1 (fr) 2023-03-10 2024-03-10 Raccord amélioré destine à être utilisé dans la formation de joints

Country Status (3)

Country Link
EP (1) EP4677167A1 (fr)
AU (1) AU2024237075A1 (fr)
WO (1) WO2024187226A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2025208176A1 (fr) * 2024-04-04 2025-10-09 Anthony Scarmozzino Système de tube de coulis pour installation de panneau mural préfabriqué

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2144381A1 (de) * 1971-09-04 1973-03-22 Kober Ag Gelenk oder scharnier aus elastomerem werkstoff
CH676617A5 (fr) * 1987-03-13 1991-02-15 Dyckerhoff & Widmann Ag
CA2975896A1 (fr) * 2014-02-06 2015-08-13 Srg Ip Pty Ltd Connecteur pour la formation de joints
US20160281345A1 (en) * 2015-03-04 2016-09-29 Large Caliber Design, Llc Resilient seal
EP3189901A1 (fr) * 2016-01-11 2017-07-12 HILTI Aktiengesellschaft Injecteur destine a remplir un espace annulaire autour d'un boulon d'ancrage
EP3529423B1 (fr) * 2016-10-20 2026-01-28 SRG IP Pty Ltd Connecteur amélioré pour une utilisation dans la formation de joints
US10975567B2 (en) * 2017-12-21 2021-04-13 Reliance Worldwide Corporation Extendable sleeve for poured concrete deck
US20190301509A1 (en) * 2018-04-01 2019-10-03 Daryl George Philip Anchor Plug with Prefilled Adhesive
AU2020101449C4 (en) * 2018-12-21 2023-08-31 Max Frank Gmbh & Co. Kg Improved Connector
CN110258793B (zh) * 2019-06-03 2024-04-26 中国建筑股份有限公司 一种套接波纹管的预制梁柱接缝构造及其施工方法

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WO2024187226A1 (fr) 2024-09-19
AU2024237075A1 (en) 2025-09-11

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