EP4245919B1 - Dehnungsfuge zwischen zwei betonplatten, die für den durchgang von automatisch geführten fahrzeugen angepasst sind - Google Patents

Dehnungsfuge zwischen zwei betonplatten, die für den durchgang von automatisch geführten fahrzeugen angepasst sind Download PDF

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Publication number
EP4245919B1
EP4245919B1 EP23155455.1A EP23155455A EP4245919B1 EP 4245919 B1 EP4245919 B1 EP 4245919B1 EP 23155455 A EP23155455 A EP 23155455A EP 4245919 B1 EP4245919 B1 EP 4245919B1
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EP
European Patent Office
Prior art keywords
expansion joint
concrete
profile
internal
longitudinal
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.)
Active
Application number
EP23155455.1A
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English (en)
French (fr)
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EP4245919C0 (de
EP4245919A1 (de
Inventor
Arnaud De Rivas
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.)
Forezienne De Conseil Et D'investissement Sfci Ste
Original Assignee
Forezienne De Conseil Et D'investissement Sfci Ste
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Publication of EP4245919C0 publication Critical patent/EP4245919C0/de
Publication of EP4245919B1 publication Critical patent/EP4245919B1/de
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Classifications

    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
    • E01D19/00—Structural or constructional details of bridges
    • E01D19/06—Arrangement, construction or bridging of expansion joints
    • 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
    • E01C11/08—Packing of metal
    • 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
    • E01C11/10—Packing of plastic or elastic materials, e.g. wood, resin
    • 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
    • E01C11/12—Packing of metal and plastic or elastic materials

Definitions

  • the invention relates to the technical field of expansion joints between two adjacent concrete slabs, capable of resisting and following the movements of the slabs after retraction of the concrete.
  • expansion joints between the slabs adapted, on the one hand, to create a space of air necessary for the absorption of variations in volume of a slab, for example under the action of shrinkage, and on the other hand, to resist and follow the movements of the slabs, for example during the movement of heavy loads stored on slabs or during earthquakes.
  • the automatic drive of this type of vehicle means that the ground surface must be free of any defect that could cause impacts and jerks to the wheels of the vehicle when traveling.
  • the space generated between two longitudinal elements of a straight edge expansion joint is incompressible due to the shrinkage of the concrete.
  • the shrinkage can take the form of an opening which can vary between a few millimeters to 10 to 20 mm, or even 20 to 25 mm, for example in cold rooms.
  • expansion joints comprising two longitudinal elements having sinusoidal profiles joined to each other so as to engage crests of one element with hollows of the other element.
  • French standard NF DTU 13.3 now requires the installation of an expansion joint with longitudinal elements with sinusoidal profiles when vehicles traveling on concrete slabs make more than 250 passes per day over the expansion joints.
  • each sinusoidal element is intended to form an integral part with an upper and horizontal edge of a concrete slab, the longitudinal elements being intended to move away from each other by a distance corresponding to the theoretical shrinkage after drying concrete slabs, and each longitudinal element comprises an external sinusoidal profile intended to be in contact with a concrete slab, and an internal sinusoidal profile in contact with the internal sinusoidal profile of the other sinusoidal element.
  • the wheel of a vehicle does not tend to fall between the two longitudinal elements of the joint. Said wheel therefore no longer hits the longitudinal elements of the joint when passing over the joint, but is in practice supported by one or other of the longitudinal elements of the adjacent slabs. This characteristic makes it possible to limit shocks and, ultimately, wear of the concrete slabs near the expansion joints.
  • automatically guided vehicles have increasingly smaller wheels, and in particular smaller than those of forklift vehicles, such as forklifts, vehicles known as “tritracks” or other well-known pallet trucks, so that the requirement becomes stronger.
  • One of the aims of the invention is therefore to remedy these drawbacks by proposing an expansion joint between two adjacent concrete slabs capable of providing a rolling surface without impact and jerk to a vehicle, in particular a vehicle with automatic guidance, without having to try to limit the value of concrete shrinkage after drying.
  • an expansion joint has been developed for a formwork system for concrete slabs on which at least one automatically guided vehicle is intended to circulate.
  • the expansion joint is in the form of two longitudinal elements each intended to form an integral part with an upper and horizontal edge of a concrete slab.
  • the longitudinal elements are intended to move away from each other by a distance corresponding to the theoretical shrinkage after drying of the concrete slabs, and each longitudinal element comprises an external sinusoidal profile intended to be in contact with a concrete slab.
  • each longitudinal element comprises an internal sawtooth profile so as to engage crests of the internal profile of one longitudinal element with hollows of the internal profile of the other longitudinal element, each crest and hollow being open to 'an angle less than or equal to 34.70°, with a radius of curvature at the apex less than 2 mm.
  • the longitudinal elements of the expansion joint according to the invention are designed so as to leave a gap between them which is reduced, even after shrinkage of the concrete by a maximum shrinkage value of 25 mm.
  • the gap left between the longitudinal elements is such that wheels of at least 15.6 mm width, with a contact surface on the ground of at least less than 1 mm, can circulate perpendicular to the joint with continuous support, so that circulation takes place without impact.
  • the amplitude of the internal sawtooth profile is greater than 25 mm, so as not to leave a gap between the crests of the internal sawtooth profiles after retraction of the concrete.
  • the circulation on the joint according to the invention takes place without impact in a direction perpendicular to the longitudinal elements of the joint, but also in all directions, except in those which are parallel or perpendicular to a slope of a tooth of the profiles sawtooth, but this on the assumption of circulation with a wheel.
  • the minimum necessary being three wheels, circulation in all directions is therefore possible subject to dimensioning and respecting a horizontal and vertical spacing and positioning of the wheels sufficient so that three wheels are always supported on the current part of the paving and not on the joint.
  • the amplitude of the internal sawtooth profile is greater than or equal to 40 mm in order to further reduce the gap between the internal sawtooth profiles after retraction of the concrete and therefore to further reduce the risk that the vehicle wheel is not supported when passing over the joint.
  • the amplitude value of 40 mm allows the crests to penetrate into the hollows of the complementary internal profiles with a value of 15 mm for a shrinkage of 25 mm after retraction of the concrete.
  • This characteristic makes it possible to reduce the gap between the slopes of the sawtooth of the sawtooth profiles to help reduce the risk of impacts when the wheels travel in a direction parallel or perpendicular to a slope of a tooth of the sawtooth profiles.
  • the internal sinusoidal profiles can have different shapes without departing from the scope of the invention.
  • the internal sinusoidal profiles can have vertices at a screw angle to have a sinusoidal sawtooth profile, or vertices with a radius of curvature to have a so-called classic sinusoidal profile.
  • the radius of curvature at the top of the sawtooth profiles is less than 1 mm, preferably less than 0.5 mm so as not to clip the profiles and enlarge the gap between the longitudinal elements.
  • the invention relates to an expansion joint (1) used to create an air space between two adjacent concrete slabs, necessary for absorbing variations in volume of the slabs, for example under the action of retraction of the slabs during drying.
  • the expansion joint (1) is adaptable to any type of formwork system implementing at least one vertical separation plate (2) of two adjacent concrete slabs, such as that described for example in the international application for patent published under number WO 2013/072619 .
  • the upper part of the vertical separation plate (2) of the formwork system is made integral with the expansion joint (1), and more precisely with two longitudinal elements (3, 4) having “sinusoidal” profiles or more generally in waves, that is to say with alternating troughs and crests.
  • the separation plate (2) comprises in its upper part a horizontal support plane on which one of the sinusoidal elements (4) is fixedly secured, by any appropriate means, and preferably by welding.
  • a sinusoidal element (4) is arranged over the entire length of the plate (2) so as to form a horizontal support plane, and is coupled with the second sinusoidal element (3).
  • each sinusoidal element is intended to form an integral part with an upper edge and horizontal of a concrete slab.
  • the longitudinal elements (3, 4) are intended to move away from each other by a distance corresponding to the theoretical shrinkage (r).
  • each sinusoidal element (3, 4) comprises a width determined so as to define an external sinusoidal profile intended to be in contact with a concrete slab, and an internal sawtooth profile, see figure 2 , in contact with the complementary internal profile of the other sinusoidal element.
  • Each sinusoidal element comprises for example rods (not shown) projecting from a lower face, obliquely, and in the opposite direction to the other sinusoidal element to constitute concrete grip means, thus arranged to ensure balancing.
  • the expansion joint (1) makes it possible to ensure continuity between the concrete slabs so that the circulation of a vehicle, in particular of the automated guided type known by the acronym AGV from the English "Automatic guided vehicle”, with wheels at least 15.6 mm wide, having a contact surface at least 1 mm wide (reference (5a)), can be done without impact, even with a maximum removal of 25 mm after drying of the concrete slabs.
  • the expansion joint according to the invention after retraction of the concrete by 10 mm for example, does not leave a gap greater than 1 mm for a wheel of 6.5 mm width, circulating on the joint, transversely to the longitudinal elements (3, 4).
  • the amplitude (A) of the internal sawtooth profile is greater than 25 mm, see figure 1 , and preferably greater than or equal to 40 mm, see Figure 2 .
  • the radius of curvature at the top of the sawtooth profiles is less than 1 mm, preferably less than 0.5 mm, see figure 2 .
  • the joint according to the invention makes it possible to have a gap of 6 mm for a wheel having a width less than 52 mm, when the concrete shrinks by 20 mm. And a gap of 4 mm for a wheel with a width less than 50 mm, when the concrete shrinks by 15 mm.
  • the central and lateral longitudinal elements (3, 4) can be in one piece. Preferably they are multi-layered, and include arrangements (6) opening out at an upper face allowing at least one surface layer to be removed from each of the longitudinal elements (3, 4) with a view to their replacement.
  • the arrangements are for example in the form of orifices passing vertically through at least one surface layer of each of the longitudinal elements (3, 4), and of inserts, not shown, positioned and fixed to a lower or intermediate layer.
  • the inserts are tapped and capable of receiving complementary clamping members for the removable fixing of the surface layer of each of the longitudinal elements (3, 4).
  • the surface layer can be made of steel or of a resin or of a composite material made from polymeric materials so that it can be sanded in order to rectify a flatness defect.
  • the sandable surface layer it is possible to have one or more layers, for example metallic.
  • the longitudinal elements (3, 4) of the joint comprise a stack of at least three layers (3a, 3b, 3c, 4a, 4b, 4c) to ensure the transfer of vertical load between the two slabs.
  • the first longitudinal element (3) comprises three layers, with an intermediate layer (3b) called plane support connection of a width greater than that of the other two layers (3a, 3c) so as to form a longitudinal tongue projecting laterally, that is to say along a plane parallel to that of an upper face of the first longitudinal element (3).
  • the second longitudinal element (4) also comprises a stack of three layers, with an intermediate layer (4b) called plane support connection of a width less than that of the other two layers (4a, 4c) so as to form a longitudinal lateral groove, that is to say extending parallel to a plane defined by an upper face of the second longitudinal element (4), receiving in insertion the tongue of the first longitudinal element (3) to form the plane support connection.
  • an intermediate layer (4b) called plane support connection of a width less than that of the other two layers (4a, 4c) so as to form a longitudinal lateral groove, that is to say extending parallel to a plane defined by an upper face of the second longitudinal element (4), receiving in insertion the tongue of the first longitudinal element (3) to form the plane support connection.
  • the invention provides an expansion joint (1) between two adjacent concrete slabs capable of providing a rolling surface without impact and jerk to the wheels of a vehicle, in particular a vehicle with automatic guidance.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • On-Site Construction Work That Accompanies The Preparation And Application Of Concrete (AREA)
  • Road Paving Structures (AREA)

Claims (4)

  1. Dehnfuge (1) für ein Schalungssystem für Betonplatten, auf denen mindestens ein automatisch geführtes Fahrzeug verkehren soll, wobei sich die Dehnfuge (1) aus zwei Längselementen (3, 4) zusammensetzt, die jeweils als integraler Teil einer oberen und horizontalen Kante einer Betonplatte vorgesehen sind. Die Längselemente (3, 4) sind dazu bestimmt, sich voneinander um einen Abstand zu entfernen, der dem theoretischen Schrumpfen nach dem Trocknen der Betonplatten entspricht, und jedes Längselement umfasst ein äußeres sinusförmiges Profil, das dazu bestimmt ist, in Kontakt mit einer Betonplatte zu stehen, gekennzeichnet dadurch, dass jedes Längselement ein internes Sägezahnprofil aufweist, um die Spitzen des internen Profils eines Längselements in die Vertiefungen des internen Profils des anderen Längselements einzuhaken, wobei jede Spitze und Vertiefung mit einem Winkel α von weniger oder gleich 34,70° geöffnet ist, mit einem Krümmungsradius an der Spitze von weniger als 2 mm.
  2. Dehnfuge (1) gemäß Forderung 1, gekennzeichnet dadurch, dass die Amplitude des internen Sägezahnprofils größer als 25 mm ist.
  3. Dehnfuge (1) gemäß Forderung 2, gekennzeichnet dadurch, dass die Amplitude des internen Sägezahnprofils größer oder gleich 40 mm ist.
  4. Dehnfuge (1) gemäß Forderung 1, gekennzeichnet dadurch, dass der Krümmungsradius an der Spitze der Sägezahnprofile weniger als 1 mm beträgt, vorzugsweise weniger als 0,5 mm.
EP23155455.1A 2022-03-15 2023-02-07 Dehnungsfuge zwischen zwei betonplatten, die für den durchgang von automatisch geführten fahrzeugen angepasst sind Active EP4245919B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR2202241A FR3133626B1 (fr) 2022-03-15 2022-03-15 Joint de dilatation entre deux dalles de béton adapté au passage de véhicules à guidage automatique

Publications (3)

Publication Number Publication Date
EP4245919A1 EP4245919A1 (de) 2023-09-20
EP4245919C0 EP4245919C0 (de) 2024-05-01
EP4245919B1 true EP4245919B1 (de) 2024-05-01

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ID=81648736

Family Applications (1)

Application Number Title Priority Date Filing Date
EP23155455.1A Active EP4245919B1 (de) 2022-03-15 2023-02-07 Dehnungsfuge zwischen zwei betonplatten, die für den durchgang von automatisch geführten fahrzeugen angepasst sind

Country Status (2)

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EP (1) EP4245919B1 (de)
FR (1) FR3133626B1 (de)

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2902118B1 (fr) * 2006-06-13 2008-08-15 Equip Tech Pour L'ind De La Co Joint de dilatation pour ouvrage routier
GB201115940D0 (en) * 2011-09-14 2011-10-26 Permaban Ltd Movement joint
ES2527847T3 (es) 2011-11-17 2015-01-30 Sifloor Dispositivo para el ajuste de la altura de un encofrado para losas de hormigón
FR3049970B1 (fr) * 2016-04-07 2020-12-04 Sifloor Joint de dilatation a renovation facilitee pour systeme de coffrage de dalles de beton

Also Published As

Publication number Publication date
EP4245919C0 (de) 2024-05-01
FR3133626B1 (fr) 2024-03-29
EP4245919A1 (de) 2023-09-20
FR3133626A1 (fr) 2023-09-22

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