• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    Expansion joint (1) between two concrete slabs comprising first and second lips (3, 4), each intended to form an integral part with an upper and horizontal edge of a concrete slab, and fixed one to the other by means capable of breaking under a horizontal retraction of at least one concrete slab, the first and second lips (3, 4) each comprising rods (6) projecting to form gripping means in the concrete, the lower face of the first lip (3) is integral throughout its entire length of a separating plate (2) extending orthogonally to said lower face and comprising first elements (7) of charge transfer between the concrete slabs protruding perpendicularly on the side of the first lip (3), and second load transfer elements (8) protruding perpendicularly on the side of the second lip. According to the invention, the second elements (8) protrude by a greater length than the first elements (7).
    公开号:FR3043105A1
    申请号:FR1560401
    申请日:2015-10-30
    公开日:2017-05-05
    发明作者:Rivas Arnaud De
    申请人:SIFLOOR；
    IPC主号:
    专利说明:

    EXPANSION JOINT FOR FORMWORK SYSTEM OF DAT, T, FS, OL
    CONCRETE
    Technical area
    The present invention relates to the technical field of concrete slab formwork systems providing an expansion joint between two adjacent slabs. The present invention more particularly relates to an improved expansion joint for such a formwork system.
    PRIOR ART
    In the field of construction, and in particular in that relating to the ground cover by concrete slabs, it is well known to use a formwork system including expansion joints between the slabs.
    Indeed, it is usual to divide the concrete slab into several adjacent slabs, depending on its area and its thickness, to create an air space necessary for the absorption of volume variations of a slab, for example under the action of withdrawal.
    An expansion joint between two adjacent concrete slabs known from the state of the art generally comprises first and second longitudinal lips, each intended to form an integral part with an upper and horizontal edge of a slab of slab. concrete. These first and second lips are fixed to each other by fixing means capable of breaking under a horizontal retraction of at least one concrete slab.
    The first and second lips each comprise rods protruding to form gripping means in the concrete.
    The lower face of the first lip is made integral throughout its length of a sheet intended to achieve a vertical separation between the two adjacent concrete slabs. The separating plate extends orthogonally to said lower face and comprises first vertical load transfer elements between the concrete slabs protruding perpendicularly on the side of the first lip, and second load transfer members projecting perpendicularly on the side of the first second lip.
    In this way, after retraction of the concrete slabs, the first and second lips, which form the upper edges of the slabs, move away from each other with the first lip which remains secured to the separating plate.
    In theory, the final removal of a concrete slab is of the order of 0.3 millimeters per linear meter of concrete slab, and in the current state of the art, it is considered for calculations of transfer of concrete. vertical load that the two slabs retract identically on both sides of the vertical partition plate. The load transfer elements, which extend on either side of the vertical partition plate, are sized to assume the theoretical shrinkage of the two slabs, while ensuring the continuity of the vertical load transfer.
    The load transfer recovery calculations are carried out for a theoretical length of penetration of the transfer elements in the concrete slabs, in particular identical on both sides of the separating plate. Thus, the expansion joint suppliers announce a certain value of recovery of charge transfer carried out by their expansion joints.
    However, in practice, the shrinkage does not occur as predicted by the theory, and therefore the load recovery values reported by the expansion joint suppliers do not match those actually observed.
    It is therefore an object of the invention to overcome this drawback by proposing an expansion joint for a concrete slab formwork system, of simple and inexpensive design, providing a uniform distribution of the stresses in the concrete, on both sides of the expansion joint, making it possible to ensure load transfer recoveries between the slabs greater than the actual load transfer recoveries observed with the expansion joints of the current state of the art .
    Another objective is to provide such an expansion joint to effectively ensure load recoveries at least equivalent to theoretical load recoveries for a retraction of slabs corresponding to the theoretical retraction.
    Another object of the invention is to provide such an expansion joint which allows a differential linear shrinkage of the concrete slabs in a direction parallel to the joint. For this purpose, it has been developed an expansion joint between two adjacent concrete slabs according to the state of the art in that it comprises first and second longitudinal lips, each intended to form an integral part with a ridge upper and horizontal of a concrete slab, and fixed to one another by fixing means capable of breaking under a horizontal retraction of at least one concrete slab. The first and second lips each comprise rods protruding to form gripping means in the concrete. The lower face of the first lip is made integral throughout its length with a vertical separating plate of the two adjacent concrete slabs. The separating plate extends orthogonally to said lower face and comprises first vertical load transfer elements between the concrete slabs protruding perpendicularly on the side of the first lip, and second load transfer members projecting perpendicularly on the side of the first second lip.
    According to the invention, the overflow length of the second charge transfer elements is greater than the overflow length of the first charge transfer elements which are arranged on the side of the first lip integral with the separation plate.
    Indeed, in practice, the Applicant has found that the retraction of the concrete slabs is felt only at the second transfer elements arranged on the side of the second lip. The first transfer elements arranged on the side of the first lip integral with the separating plate remain anchored in a first concrete slab and, when this first slab retracts, it causes the removal of the second transfer elements with respect to a second slab. concrete in which they are engaged. The second slab then retracts and also causes the removal of the second transfer elements relative to the second slab.
    In this way, the fact that the second transfer elements are longer than the first transfer elements makes it possible to make up for the fact that only the second transfer elements withdraw from the second adjacent slab. Thus, the resumption of load transfers provided by the expansion joint according to the invention is greater than the load transfer times actually observed with the expansion joints of the current state of the art.
    Preferably, the difference in overflow length between the first and second charge transfer elements corresponds at least to the sum of the theoretical retraction lengths of the two adjacent concrete slabs.
    In this way, the expansion joint makes it possible to actually ensure a load recovery at least equivalent to the theoretical load recovery for slab retractions corresponding to the expected theoretical retractions.
    According to a particular embodiment, the first and second load transfer elements are in the form of first and second transfer plates protruding horizontally at regular intervals along the length of the separating plate.
    The first and second transfer plates are, for example, arranged in staggered rows along the length of the separating plate, or they are arranged facing each other on both sides of the separating plate. The first and second transfer plates can be arranged at the same level or on different levels with respect to the height of the separating plate. Preferably, said first and second plates are arranged at the lower third of the height of said sheet.
    According to a particular embodiment, and in the case where the first and second transfer plates are arranged facing one another on both sides of the separating plate, said first transfer plates are in one piece with the second transfer plates in such a way that forming charge transfer through plates through an opening in said separating plate.
    Advantageously, and to allow a differential linear shrinkage of the concrete slabs in a direction parallel to the joint, the second transfer plates, at least, comprise shapes narrowing in the horizontal plane away from the separating plate. Preferably, the first charge transfer plates also comprise shapes narrowing in the horizontal plane away from the separation sheet.
    The transfer plates comprise any suitable shapes, such as triangular-shaped projecting portions having, for example, each a vertex remote from the separation sheet with a rounded conformation.
    In this way, in the case where the first and second transfer plates are monoblock, they have an asymmetrical profile and are easily implemented with the sheet provided with openings.
    Advantageously, the expansion joint has a free bearing surface of a lifting means at the lower face of one of the first or second lips. This characteristic allows, when the expansion joint according to the invention is mounted on a formwork system adapted for height adjustment of said expansion joint, to be able to raise or lower said expansion joint by means of the lifting means to ensure the adaptability of said formwork system to the thickness of concrete slabs to form.
    The expansion joint according to the invention can be implemented on any type of existing concrete slab formwork system implementing at least one vertical separating element.
    BRIEF DESCRIPTION OF THE FIGURES Other advantages and features will become more apparent from the following description of several variant embodiments, given by way of nonlimiting examples, of the expansion joint between two adjacent concrete slabs according to the invention. with reference to the accompanying drawings in which: Figure 1 is a cross-sectional view illustrating the expansion joint according to the invention arranged between two adjacent concrete slabs, before the removal of said slabs; Figure 2 is a cross-sectional view similar to that of Figure 1, one of the concrete slabs having retracted; Figure 3 is a cross-sectional view similar to that of Figure 2, the two concrete slabs having retracted; Fig. 4 is a bottom view schematically illustrating the staggered arrangement of the charge transfer elements on the separating plate, the charge transfer elements having a rectangular profile; Fig. 5 is a bottom view schematically illustrating the alignment arrangement of the charge transfer elements on the separating plate, the charge transfer elements having a rectangular profile; Fig. 6 is a bottom view schematically illustrating the alignment arrangement of the charge transfer elements on the separating plate, the charge transfer elements having a triangular profile; Figure 7 is a perspective view of a preferred embodiment of the expansion joint, with the one-piece charge transfer members passing through the separating plate; FIG. 8 is a view from above of a monobloc transfer element of FIG. 7.
    Description DETAIL OF THE INVENTION The invention relates to an expansion joint (1) between two adjacent concrete slabs, used when necessary, for pouring concrete, to divide a concrete slab into several adjacent slabs (A , B), depending on its area and its thickness, to create an air space necessary for the absorption of volume variations of a slab, for example under the action of the withdrawal.
    The expansion joint (1) according to the invention is adaptable to any type of formwork system implementing at least one vertical separating element of two adjacent concrete slabs (A, B), such as for example a sheet metal (2). ) vertical separation.
    Referring to Figures 1 to 3, the expansion joint (1) comprises for this purpose a first longitudinal lip (3) in the form of an elongated element square section for example. The lower face of this first lip (3) is secured over its entire length of the vertical separation sheet (2) extending orthogonally to said lower face. For this purpose, the separating plate (2) has a horizontal bearing plane (2a) on which the first lip (3) is fixedly secured by any appropriate means, and preferably by welding.
    The sheet (2) of separation is preferably made of thin sheet, for example 2 mm thick and is intended to achieve a vertical separation between two adjacent concrete slabs (A, B) during the formwork.
    The expansion joint (1) comprises a second longitudinal lip (4), similar to the first lip (3) and fixed thereto in a parallel manner and by means of fixing means (5) adapted to breaking under a horizontal force of retraction of at least one concrete slab.
    The first and second lips (3, 4) are each intended to form an integral part with an upper and horizontal edge of a concrete slab, and each comprise rods (6) projecting from a face intended to be in contact with each other. contact with a concrete slab, for example an external lateral face, to constitute gripping means in the concrete.
    The means (5) for fixing the two lips (3, 4) to each other are, for example, nylon or plastic screws and nuts. The plastic screws are intended to break under the retraction effort of at least one concrete slab. These fixing means (5) will not be described in more detail because they are well known from the current state of the art. After removing the concrete slabs and breaking the fastening means (5), the first lip (3) and the separating plate (2) remain integral with a first slab (A) while the second lip (4) is move away and remain attached to the adjacent second slab (B).
    With reference to FIGS. 1 to 8, the separation sheet (2) comprises first and second elements (7, 8) for vertical load transfer between the concrete slabs (A, B).
    For the sake of simplification of the drawings, FIGS. 4 to 6 only show the separating sheet (2) viewed from below with the first and second transfer elements (7, 8). The other components of the expansion joint, such as rods, lips or even the support plane of the sheet, are not shown. For the same reasons, in Figure 7 the protruding rods are not shown.
    The first and second transfer elements (7, 8) are, for example, in the form of first and second transfer plates (7, 8) protruding horizontally at regular intervals along the length of the separating plate (2). In another embodiment, these first and second elements may be studs.
    With reference to FIG. 4, the first and second transfer plates (7, 8) can be staggered on either side and along the length of the separating plate (2), or, with reference to FIGS. 5 to 7, be arranged facing both sides of the sheet (2) separation.
    The first and second plates (7, 8) transfer a vertical force exerted on a slab (A) to the other adjacent slab (B). They may have all appropriate shapes, and comprise for example a rectangular profile with reference to FIGS. 4 and 5. With reference to FIGS. 6 to 8, and to also allow the differential linear shrinkage of the concrete slabs in the direction parallel to the lips (3). , 4), said first and second transfer plates (7, 8), and essentially the second transfer plates (8) arranged on the side of the second lip (4) not integral with the separating plate (2), comprise forms narrowing in the horizontal plane away from the sheet metal (2), such as for example protruding portions of triangular shapes, preferably each having a vertex remote from the sheet (2) of separation comprising a rounded conformation.
    With reference to FIGS. 1 to 8, and according to an essential characteristic of the invention, the second charge transfer plates (8) protrude from the separation sheet (2) by a length greater than the overflow length of the first load transfer plates (7) which are arranged on the side of the first lip (3) integral with the separation sheet (2). Indeed, the difference in overflow length between the first and second charge transfer plates (7, 8) advantageously corresponds to at least the sum of the theoretical lengths of retraction of the two adjacent concrete slabs (A, B).
    More particularly, the theoretical shrinkage length of a slab is calculated as a function of the slab length covered by the expansion joint (1) and is of the order of 0.3 millimeters per linear meter of concrete slab. For example, if the expansion joint (1) is arranged between two slabs 30 meters long, the theoretical retraction length for each slab will be 9 millimeters. According to the invention, the second charge transfer plates (8) comprise 18 millimeters more overflow length than the first charge transfer plates (7).
    Thus, with reference to FIG. 2, during the retraction of the concrete slab (A) fastened to the first lip (3), the first transfer plates (7) arranged on the side of the first lip (3) integral with the separation sheet (2) remains anchored in said concrete slab, and the second load transfer plates (8) are removed from the adjacent concrete slab (B). Then, with reference to FIG. 3, when the second slab (B) retracts, said second transfer plates (8) are further removed from said second slab (B).
    To illustrate the invention, if the slabs (A, B) are 30 meters long, when the first slab (A) retracts, the second plates (8) of transfer are removed from the second slab (B) of a length of 9 millimeters. And when the second slab (B) retracts, said second plates (8) are removed from the second slab (B) an additional 9 millimeters. The second transfer plates (8) are thus removed in total from 18 millimeters of the second slab (B).
    According to the invention, the second load transfer plates (8) are dimensioned to catch these withdrawal lengths and make it possible to ensure identical load transfer recoveries from one slab to another. Indeed, after retraction, the penetration length of the second transfer plates (8) in the second slab (B) is identical to the penetration length of the first plates (7) of transfer in the first slab (A).
    In this way, the expansion joint (1) makes it possible to actually provide a load recovery equivalent to the theoretical load recovery for a retraction of slabs corresponding to the expected theoretical retraction. Load recovery calculations are not distorted.
    Referring to Figures 7 and 8, and according to a simple and inexpensive design of the invention, the sheet (2) separation comprises a horizontal opening (9) formed in the thickness of said sheet (2). The opening (9) comprises a shape, for example oblong, adapted to the section of the charge transfer plates (7, 8). Said first transfer plates (7) are monoblock with the second transfer plates (8) and are arranged through the opening (9) in the separating plate (2). The one-piece plates (10) thus formed are made integral with the sheet (2), for example by welding points (11) or by any appropriate technique. Those skilled in the art will, of course, be able to adapt the overflow lengths of the first and second charge transfer plates (7, 8) as a function of the theoretical shrinkage calculated for the concrete slabs (A, B).
    In known manner, the first and second lips (3, 4) of the expansion joint (1) according to the invention can, without departing from the scope of the invention, have sinusoidal longilinear profiles in order to ensure continuity at the level of the separation between the two concrete slabs (A, B). Thus, a wheel of a vehicle traveling on the pavement and passing from one slab to the other is always supported by the surface of one of the adjacent slabs. This characteristic makes it possible to limit the shocks and, ultimately, the wear of the concrete slabs in the vicinity of the expansion joints.
    Advantageously, the support plane (2a) of the vertical sheet (2) is established on only a part of the lower face of the first lip (3), leaving free for it a bearing zone of a means elevator known from the state of the art and in particular disclosed in the international patent application WO 2013/072619, in order to be able to raise or lower said expansion joint (1) by means of the lifting means to ensure the adaptability of said system of formwork at the thickness of concrete slabs to form.
    Finally, it is obvious that the examples that have just been given are only particular illustrations in no way limiting as to the fields of application of the invention.
    权利要求:
    Claims (9)
    [1" id="c-fr-0001]
    1 - Expansion joint (1) between two adjacent concrete slabs (A, B), said expansion joint (1) comprises first and second longitudinal lips (3, 4), each intended to form an integral part with an upper edge and horizontal of a concrete slab, and fixed to one another by fastening means (5) capable of breaking under a horizontal retraction of at least one concrete slab, the first and second lips (3, 4) each comprising rods (6) protruding to form gripping means in the concrete, the lower face of the first lip (3) is made integral throughout its length with a sheet (2) vertical separation between the two adjacent concrete slabs, said separating sheet (2) extending orthogonally to said lower face and comprises first elements (7) for vertical load transfer between the concrete slabs protruding perpendicularly from the side of the first lip (3), and second load transfer elements (8) protruding perpendicularly on the side of the second lip (4), characterized in that the overflow length of the second load transfer elements (8) is greater than the length of overflow of the first elements (7) of charge transfer which are arranged on the side of the first lip (3) integral with the sheet (2) separation.
    [2" id="c-fr-0002]
    2- expansion joint (1) according to claim 1, characterized in that the difference in overflow length between the first and second load transfer elements (7, 8) corresponds at least to the sum of the theoretical lengths of shrinkage of the two adjacent concrete slabs (A, B).
    [3" id="c-fr-0003]
    3 - Expansion joint (1) according to any one of claims 1 to 2, characterized in that the first and second load transfer elements are in the form of first and second transfer plates (7, 8) overflowing horizontally at regular intervals along the length of the separating plate (2).
    [4" id="c-fr-0004]
    4 - Expansion joint (1) according to claim 3, characterized in that the first and second transfer plates (7, 8) are staggered along the length of the sheet (2) separation.
    [5" id="c-fr-0005]
    5 - Expansion joint (1) according to claim 3, characterized in that the first and second transfer plates (7, 8) are arranged opposite on either side of the sheet (2) separation.
    [6" id="c-fr-0006]
    6 - Expansion joint (1) according to claim 5, characterized in that said first transfer plates (7) are in one piece with the second transfer plates (8) so as to form through plates (10) for transferring charge through an opening (9) formed in said separating plate (2).
    [7" id="c-fr-0007]
    7 - expansion joint (1) according to any one of claims 3 to 6, characterized in that the second plates (8) of transfer, at least comprise shapes narrowing in the horizontal plane away from the separation sheet (2).
    [8" id="c-fr-0008]
    8 - Expansion joint (1) according to claim 7, characterized in that the second transfer plates (8) comprise triangular-shaped projecting portions.
    [9" id="c-fr-0009]
    9 - Expansion joint (1) according to claim 8, characterized in that the triangular shapes each have a vertex remote from the sheet (2) separation comprising a rounded conformation.
    类似技术:
    公开号 | 公开日 | 专利标题
    FR3043105A1|2017-05-05|EXPANSION JOINT FOR FORMWORK SYSTEM OF CONCRETE SLABS
    CA2714270C|2015-10-06|Anchor for handling construction elements comprising fixed divergent arms
    EP3228746B1|2019-02-13|Expansion joint convenient to repair for concrete slabs shuttering system
    EP2993267B1|2017-06-14|Formwork system comprising an improved expansion joint
    WO2002086247A1|2002-10-31|Ready-to-install road equipment and corresponding installation method
    EP2500481B1|2014-06-25|Infilling formwork elements for floors, made of foamed plastic material
    FR3025813A1|2016-03-18|RAILWAY RAIL SUPPORT SADDLE
    BE1017376A5|2008-07-01|METAL JOINT FOR EXPANSION BETWEEN CONCRETE SLABS.
    FR2581101A1|1986-10-31|Prefabricated end part called bridge head limiting a crossing of a ditch
    EP2527533B1|2014-10-29|Interlocking concrete paving block
    EP2381034B1|2017-08-16|Device intended for being installed in an expansion joint between concrete slabs
    WO2018215699A1|2018-11-29|Easily renovated expansion joint for a concrete slab formwork system
    FR2904614A1|2008-02-08|Prefabricated wall transporting device, has maintaining unit maintaining wall in vertical position, and provided with support unit cooperating with external lateral wall of plate of wall to laterally maintain wall
    FR2941725A1|2010-08-06|Parallelepiped block shaped thermal insulation element for construction block of e.g. longitudinal wall of concrete floor in building, has openings formed from lower and outer faces to open into housing to define assembling wall with block
    EP3957794A1|2022-02-23|Self-locking concrete paving bloc
    WO2020254942A1|2020-12-24|Mixed steel-concrete floor structure with optimal slab arrangement
    FR3029444A1|2016-06-10|PRECONTROL BENCH FOR PREFABRICATION OF A CONCRETE STRUCTURAL ELEMENT AND METHOD OF IMPLEMENTING SUCH A BENCH
    EP3073022B1|2019-12-18|Nesting tile
    FR2880905A1|2006-07-21|BUILDING ELEMENTS AND SUPPORT WALL COMPLETED WITH SUCH ELEMENTS
    FR3080869A1|2019-11-08|METHOD FOR MANUFACTURING FLOOR, FLOOR AND INTEGRATED STONE FORMING MEMBER THEREFOR
    EP2489417A1|2012-08-22|Moulded block for manufacturing modular devices and manufacturing method
    FR2997429A1|2014-05-02|Element assembly for installation of wind-bracing along e.g. synthetic hardcore wall of building, has lengthwise adjustable struts comprising fixing units that engage with fixing units of posts and elongated elements
    EP2216442B1|2015-10-14|Device for fitting an expansion joint, in particular an expansion joint between concrete slabs
    OA19772A|2021-04-08|A method of manufacturing a floor, floor and associated integrated prop formwork element.
    FR3072697A1|2019-04-26|SUSPENDED CEILING SLAB REINFORCEMENT ASSEMBLY AND METHOD FOR IMPLEMENTING SAME
    同族专利:
    公开号 | 公开日
    FR3043105B1|2018-10-26|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    EP2381034A2|2010-04-22|2011-10-26|Plakabeton S.A.|Device intended for being installed in an expansion joint between concrete slabs|US20180171629A1|2016-12-20|2018-06-21|Illinois Tool Works Inc.|Load transfer plate and method of employing same|
    US10590643B2|2016-11-16|2020-03-17|Illinois Tool Works Inc.|Load transfer plate and load transfer plate pocket and method of employing same|
    USD922719S1|2019-12-20|2021-06-15|Illinois Tool Works Inc.|Load transfer plate pocket|
    US11136729B2|2017-10-13|2021-10-05|Illinois Tool Works Inc.|Edge protection system having retaining clip|
    US11136727B2|2017-10-13|2021-10-05|Illinois Tool Works Inc.|Edge protection system having clip retainment|
    US11136728B2|2017-10-13|2021-10-05|Illinois Tool Works Inc.|Edge protection system having bridging pins|
    US11136756B2|2017-10-13|2021-10-05|Illinois Tool Works Inc.|Edge protection system having dowel plate|
    US11280087B2|2017-10-13|2022-03-22|Illinois Tool Works Inc.|Edge protection system with intersection module|
    US11041318B1|2019-12-20|2021-06-22|Illinois Tool Works Inc.|Load transfer plate apparatus|
    法律状态:
    2016-10-29| PLFP| Fee payment|Year of fee payment: 2 |
    2017-05-05| PLSC| Publication of the preliminary search report|Effective date: 20170505 |
    2017-10-24| PLFP| Fee payment|Year of fee payment: 3 |
    2018-10-27| PLFP| Fee payment|Year of fee payment: 4 |
    2019-10-25| PLFP| Fee payment|Year of fee payment: 5 |
    2020-10-29| PLFP| Fee payment|Year of fee payment: 6 |
    2021-10-26| PLFP| Fee payment|Year of fee payment: 7 |
    优先权:
    申请号 | 申请日 | 专利标题
    FR1560401|2015-10-30|
    FR1560401A|FR3043105B1|2015-10-30|2015-10-30|EXPANSION JOINT FOR FORMWORK SYSTEM OF CONCRETE SLABS|FR1560401A| FR3043105B1|2015-10-30|2015-10-30|EXPANSION JOINT FOR FORMWORK SYSTEM OF CONCRETE SLABS|
    [返回顶部]