WO2008086577A1 - Joints en tissu posés encore humides et pouvant durcir - Google Patents

Joints en tissu posés encore humides et pouvant durcir Download PDF

Info

Publication number
WO2008086577A1
WO2008086577A1 PCT/AU2008/000061 AU2008000061W WO2008086577A1 WO 2008086577 A1 WO2008086577 A1 WO 2008086577A1 AU 2008000061 W AU2008000061 W AU 2008000061W WO 2008086577 A1 WO2008086577 A1 WO 2008086577A1
Authority
WO
WIPO (PCT)
Prior art keywords
dowel
sleeve
legs
leg
bar
Prior art date
Application number
PCT/AU2008/000061
Other languages
English (en)
Inventor
Daniel Charles Underwood
Original Assignee
Danley Construction Products 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 AU2007900279A external-priority patent/AU2007900279A0/en
Application filed by Danley Construction Products Pty Ltd filed Critical Danley Construction Products Pty Ltd
Priority to AU2008202901A priority Critical patent/AU2008202901B2/en
Publication of WO2008086577A1 publication Critical patent/WO2008086577A1/fr

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
    • E01C11/00—Details of pavings
    • E01C11/02—Arrangement or construction of joints; Methods of making joints; Packing for joints
    • E01C11/04—Arrangement or construction of joints; Methods of making joints; Packing for joints for cement concrete paving
    • E01C11/14—Dowel assembly ; Design or construction of reinforcements in the area of joints
    • 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

Definitions

  • THIS INVENTION relates to joints in material laid while wet and allowed to harden and in particular but not limited to joints in concrete. More particularly, the invention relates to dowelled joints and to a dowel assembly and arrangement of dowels in concrete joints usually applicableto control movement of adjacent concrete slabs due to expansion and contraction.
  • dowels project from a first poured slab into the space to be occupied by the second poured slab. After the second slab is poured and hardened sheer load is taken by the dowels. As the slabs expand and contract at least one of the slabs slide on the dowels. It is usual for one end of the dowel to adhere to one slab while the other end of the dowel is free to move in the other slab. Freedom of movement is achieved by greasing the dowel or placing the dowel in a sleeve, the sleeve being embedded in the slab and the dowel and sleeve move relative to each other.
  • the present invention has an object to provide a new form of dowel in a crowded and highly developed art.
  • Preferred forms of the invention have other objects as follows.
  • One object is to provide a dowel arrangement whereby installation is simple and effective and a single bar is employed to provide two times the capacity of a standard dowel of the same thickness and material.
  • a further object is to provide a simple means to increase capacity by simply adding bars which simply nest together in a sleeve.
  • the present invention provides a material laid while wet and allowed to harden and having at least one joint dividing the material into adjacent first and second slabs, the first and second slabs being separated at the joint, the first and second slabs being maintained in alignment by spaced dowel units bridging across the joint, at least one dowel unit comprises a dowel assembly having spaced apart legs and a connector connecting the legs such that the legs are located in one only of the said first and second slabs.
  • the connector and legs are formed as an integral unit and the connector is located in the other one of the said first and second slabs.
  • the at least one dowel unit comprises a bar having legs comprising a first leg and a second leg and the connector is in the form of an apical section joining the first and second legs, the apical section comprising a bend in the bar so that the bar is generally V-shaped.
  • the at least one dowel unit further comprises a sleeve surrounding the apical region, the sleeve being embedded in the other one of said first and second adjacent slabs and the apical region of the V-shaped bar being slidable within the sleeve.
  • the at least one dowel unit comprises a bar having legs comprising a first leg and a second leg and the connector is in the form of an apical region joining the first and second legs, the apical region comprising a bend in the bar so that the legs diverge from the apical region and the bar is generally U-shaped.
  • the at least one dowel unit further comprises a sleeve surrounding the apical region, the sleeve being embedded in the other one of said first and second adjacent slabs and the apical region of the U- shaped bar being slidable within the sleeve.
  • the apical region is embedded in the other one of said first and second slabs and the legs are slidable relative to the one only of the said first and second slabs.
  • the legs may be pre-greased.
  • the legs may be held in respective sleeve means, the sleeve means being embedded in the said one only of the said first and second slabs, the apical region being embedded in the other one of said first and second slabs and the legs being slidable in said sleeve means relative to the one only of the said first and second slabs.
  • the at least one dowel unit includes lost form work located between the legs. This is used to prevent wet material flowing between the legs on that side intended to allow sliding as upon hardening this would prevent sliding.
  • the lost form work comprises an insert used to block flow of wet material into the space occupied by the insert.
  • the at least one dowel unit comprises a dowel assembly having at least two bent bars operatively configured for dowel operation.
  • the at least two bent bars are located in the sleeve with the two bars being nested together in the sleeve, the assembly being operatively configured for dowel operation.
  • the invention provides a dowel adapted to bridge across a joint, the joint being in concrete, the concrete being on opposite sides of the joint, the dowel comprising a bent bar having a first leg, a second leg and a bend intermediate the first and second legs, the first leg having a free end and the second leg having a free end, the free ends being disposed to one side of the dowel and the bend on the opposite side so that both the free ends may be located on one side of the joint with the bend on the other side of the joint.
  • the legs of the dowel diverge generally at an acute angle. Typically, in this form the legs of the dowel diverge so that the dowel is generally V- shaped.
  • the legs of the dowel are parallel.
  • the dowel is generally U-shaped.
  • the invention provides a dowel assembly comprising at least one dowel and a dowel sleeve, the dowel comprising a bent bar having a first leg, a second leg and a bend intermediate the first and second legs, the first leg having a free end and the second leg having a free end, the free ends being disposed to one side of the dowel and the bend to the opposite side, the dowel being operatively located within the sleeve with a said side of the dowel within the sleeve the other one of the said sides of the dowel projecting from the sleeve.
  • the side projecting from the sleeve has the bend.
  • the legs may or may not be parallel.
  • the side projecting from the sleeve has the legs. In this form of the dowel assembly the legs are parallel.
  • the sleeve includes capacity for additional dowels.
  • the dowel assembly includes the at least one dowel and at least a further dowel operatively located in the sleeve, the said further dowel comprising a bent bar having a first leg, a second leg and a bend intermediate the first and second legs, the first leg of the said further dowel having a free end and the second leg of the said further dowel having a free end, the free ends of the said further dowel being disposed to one side of the said further dowel and the bend to the opposite side of the said further dowel, the said further dowel being operatively located within the sleeve with a said side of the said further dowel within the sleeve and the other one of the said sides of the said further dowel projecting from the sleeve.
  • the sides of the at least one dowel and at least one further dowel projecting from the sleeve have the bend.
  • the legs of both dowels are parallel to each other and to the legs of the other dowel.
  • the sides of the at least one dowel and at least one further dowel projecting from the sleeve have the legs.
  • the legs may or may not be parallel. Typically, the legs diverge.
  • the dowel assembly is simply a bent dowel bar in the form of a first leg, a return bend being effectively the connector and a second leg, the return typically comprises a bend in the bar so that the dowel is generally V-shaped or U-shaped.
  • the V or U is generally symmetrically positioned with a leg on either an imaginary line extending at right angles to the joint.
  • the bar effectively straddles that imaginary line.
  • the legs are typically imbedded in one slab and the apex or the bent section and a marginal region thereof, referred to above as the apical region, is free to move in the other slab. It may be pre- greased for this purpose.
  • the apical region between the two legs has some form of void form or insert located between the legs in the apical region of the dowel to block ingress of wet material.
  • the apical region and the insert together comprise form work making a recess into the slab so that the slab may slide on the apical region of the dowel.
  • the assembly may include a sleeve, the apical region being located inside the sleeve, the sleeve being lost form work.
  • the sleeve includes stop means which are preferably frangible and locate the dowel within the sleeve at a predetermined spacing from walls of the sleeve to allowfor some sideways movement of the dowel within the sleeve.
  • Sideways movement refers to movement generally in the plane of the dowel but transverse the direction of joint separation.
  • the dowel is V-shaped the legs typically diverge at up to about 90° with the lower angle of divergence being about 30°. Thus the angle of divergence ranges from 30° to 90°.
  • the dowels or dowel assemblies may be formed so that each dowel or assembly is individually aligned as the form work is being built on-site. Alternatively, a number of dowels or assemblies may be put together in the factory as a preassembled group already aligned. In this case respective dowels or dowel assemblies as described above are coupled to a support which hold the dowels or dowel assemblies in predetermined spaced and operative alignment for dowel operation in a joint, the dowels or dowel assemblies being releasable from the support when in-situ.
  • the support typically comprises parallel spaced bars.
  • the dowels or dowel assemblies may be coupled to the support by frangible connection including one or more tack welds that break under slab contraction or clips to sleeves and so on, the object being to have the dowels and support held together for transport and installation but separate under load in-situ.
  • the couplings may of course be manually released in-situ but some automatic release is preferred in case users forget to manually release.
  • the dowels may be coupled to the support either directly or indirectly where a sleeve is employed in the case of an assembly and there may be multiple frangible connections associated with each dowel which release automatically in-situ.
  • the dowels are coupled to one of the wires indirectly via respective dowel sleeves for transport purposes, and there being frangible connections which release the dowels automatically in-situ.
  • Figures 5 to 7 illustrate an arrangement of dowels employing a first dowel and an optional second dowel where the apical ends of the dowels are located inside a sleeve;
  • Figures 8 to 10 are a further embodiment of the invention employing a U- shaped dowel where the legs of the dowel are located in a sleeve;
  • Figures 11 to 13 illustrate a further form of the invention wherein the dowel illustrated in Figures 6 to 8 has its apical end located in a sleeve;
  • Figures 14 and 15 illustrate an embodiment whereby the dowels according to the present invention are assembled in the factory in predetermined relative position utilising parallel spaced bars whereby the dowel assembly may be releasable in-situ or on site from one of the bars after the assembly has been placed in position thus releasing the dowels for proper operation of the dowels.
  • the dowel 11 has its apical region 18 in position by reason of stops 20 and 21 inside the sleeve 19.
  • the embodiment of Figures 5 to 7 has a further application insofar as subject to the loading capacity of the dowel 11 the capacity of the assembly may be supplemented by an additional dowel 11 shown in phantom which is nested inside the first dowel.
  • the sleeve may be made largerto accommodate any number of dowels within practical limits and the required dowel size may be factored in accordingly to allow for a complete universal system adapted fordowelling inthis way.
  • the inventory of dowels may be limited to a single dowel size for all applications.
  • Figures 8 to 13 illustrate the use of sleeves in relation to the dowel of the type illustrated in Figure 4 and it will be appreciated that due to the parallel nature of the legs 15 and 16 in this case, that the two different sleeve forms 20 and 21 may be utilised in relation to the apical region or in relation to the legs as illustrated in Figures 6, 7 and 8.
  • the sleeve 21 of Figure 11 includes stops 22 which hold the dowel in spaced position relative to the inner wall 23 of the dowel so that there is sufficient room for movement of the dowel within the sleeve 21.
  • each of the dowels are placed in a factory made dowel assembly 24 as illustrated in the example of Figures 14 and 15 wherein this case, the V-shaped dowels 25 (at this case with legs diverging at 54 degrees) are spaced evenly along parallel spaced bars 26 and 27 and this is all assembled at the factory.
  • the dowels may be secured in any suitable manner so that the whole assembly is rigid yet releasable in-situ for proper operation of the dowels.
  • Sleeves may be suitably utilised on the apical sections as previously described and clipped or otherwise mounted to the bars 26 and 27 and the dowels may, for example, also be simply clipped to the bars or spaced connecting wires may be adapted to be manually cut on site. The bars may be clipped inside the sleeves again so that they are released automatically under load.

Landscapes

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

Abstract

Les goujons (10, 11, 12) et (13) sont en V ou bien en U et ils chevauchent un joint (17) entre des dalles de béton adjacentes. Les montants (15) et (16) sont incorporés dans une dalle et la section apicale ou courbe (18) jusqu'à la ligne de jonction (17) située entre les dalles peut être lubrifiée et comporter une fiche (14) qui, lorsqu'elle est en place, permet à la section apicale de pouvoir aller librement d'avant en arrière dans la dalle correspondante. Le goujon (11) se trouve à l'intérieur d'un manchon (19) en tant que coffrage perdu dans une des dalles et dans la fiche (14). La région apicale (18) du goujon (11) est positionnée au moyen de cales (20) et (21) situées dans le manchon (19). Les capacités de l'ensemble peuvent être améliorées grâce à un goujon supplémentaire (11) caché et situé à l'intérieur du premier goujon.
PCT/AU2008/000061 2007-01-17 2008-01-17 Joints en tissu posés encore humides et pouvant durcir WO2008086577A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2008202901A AU2008202901B2 (en) 2007-01-17 2008-01-17 Joints in material laid while wet and allowed to harden

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AU2007900279A AU2007900279A0 (en) 2007-01-17 Dowel assembly
AU2007900279 2007-01-17

Publications (1)

Publication Number Publication Date
WO2008086577A1 true WO2008086577A1 (fr) 2008-07-24

Family

ID=39635583

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/AU2008/000061 WO2008086577A1 (fr) 2007-01-17 2008-01-17 Joints en tissu posés encore humides et pouvant durcir

Country Status (2)

Country Link
AU (1) AU2008202901B2 (fr)
WO (1) WO2008086577A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2481867A1 (fr) * 2011-01-28 2012-08-01 SCHÖCK BAUTEILE GmbH Elément de montage dans des joints de séparation de bâtiments
WO2020263784A1 (fr) * 2019-06-25 2020-12-30 Illinois Tool Works Inc. Procédé et appareil de placement à deux ascenseurs d'une ouvrage plate en béton

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19739446A1 (de) * 1997-09-02 1999-03-11 Kahneisen Ges Mbh Deutsche Querkraftlager
US6092960A (en) * 1998-10-27 2000-07-25 Mccallion; James P. Concrete joint restraint system
US6502359B1 (en) * 2000-02-22 2003-01-07 Bometals, Inc. Dowel placement apparatus for concrete slabs
AU2005100938A4 (en) * 2005-11-08 2005-12-08 Icf Contracting Pty Ltd Connector device for concrete structures
WO2005124043A1 (fr) * 2004-06-15 2005-12-29 Galcorp (Nz) International Limited Elements de construction et methodes de construction associees

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6354760B1 (en) * 1997-11-26 2002-03-12 Russell Boxall System for transferring loads between cast-in-place slabs
US7338230B2 (en) * 2003-08-13 2008-03-04 Shaw & Sons, Inc. Plate concrete dowel system
US6926463B2 (en) * 2003-08-13 2005-08-09 Lee A. Shaw Disk plate concrete dowel system
GB0510298D0 (en) * 2005-05-20 2005-06-29 Devlin Seamus M Slab load transfer plate

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19739446A1 (de) * 1997-09-02 1999-03-11 Kahneisen Ges Mbh Deutsche Querkraftlager
US6092960A (en) * 1998-10-27 2000-07-25 Mccallion; James P. Concrete joint restraint system
US6502359B1 (en) * 2000-02-22 2003-01-07 Bometals, Inc. Dowel placement apparatus for concrete slabs
WO2005124043A1 (fr) * 2004-06-15 2005-12-29 Galcorp (Nz) International Limited Elements de construction et methodes de construction associees
AU2005100938A4 (en) * 2005-11-08 2005-12-08 Icf Contracting Pty Ltd Connector device for concrete structures

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2481867A1 (fr) * 2011-01-28 2012-08-01 SCHÖCK BAUTEILE GmbH Elément de montage dans des joints de séparation de bâtiments
WO2020263784A1 (fr) * 2019-06-25 2020-12-30 Illinois Tool Works Inc. Procédé et appareil de placement à deux ascenseurs d'une ouvrage plate en béton
US11203840B2 (en) 2019-06-25 2021-12-21 Illinois Tool Works Inc. Method and apparatus for two-lift concrete flatwork placement

Also Published As

Publication number Publication date
AU2008202901B2 (en) 2010-06-10
AU2008202901A1 (en) 2008-07-31

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