EP3879046A1 - Hubvorrichtung für bauelement, entsprechendes bauelement und herstellungsverfahren - Google Patents

Hubvorrichtung für bauelement, entsprechendes bauelement und herstellungsverfahren Download PDF

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Publication number
EP3879046A1
EP3879046A1 EP21162098.4A EP21162098A EP3879046A1 EP 3879046 A1 EP3879046 A1 EP 3879046A1 EP 21162098 A EP21162098 A EP 21162098A EP 3879046 A1 EP3879046 A1 EP 3879046A1
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EP
European Patent Office
Prior art keywords
parts
lifting device
branches
construction element
lifting
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.)
Withdrawn
Application number
EP21162098.4A
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English (en)
French (fr)
Inventor
Richard Garcia
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.)
KP1 SAS
Original Assignee
KP1 SAS
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by KP1 SAS filed Critical KP1 SAS
Publication of EP3879046A1 publication Critical patent/EP3879046A1/de
Withdrawn legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
    • E04G21/14—Conveying or assembling building elements
    • E04G21/142—Means in or on the elements for connecting same to handling apparatus
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B23/00—Arrangements specially adapted for the production of shaped articles with elements wholly or partly embedded in the moulding material; Production of reinforced objects
    • B28B23/005—Arrangements specially adapted for the production of shaped articles with elements wholly or partly embedded in the moulding material; Production of reinforced objects with anchoring or fastening elements for the shaped articles
    • 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
    • E04B5/36—Floor structures wholly cast in situ with or without form units or reinforcements with form units as part of the floor
    • E04B5/38—Floor structures wholly cast in situ with or without form units or reinforcements with form units as part of the floor with slab-shaped form units acting simultaneously as reinforcement; Form slabs with reinforcements extending laterally outside the element

Definitions

  • the invention relates to a lifting device for a building element.
  • the invention also relates to a construction element provided with such a lifting device.
  • the invention also relates to a method of manufacturing such a building element.
  • pre-slabs to construct the floors of a building saves considerable time on the construction of this building.
  • a pre-slab is fabricated at a production site so that it is light enough to be transportable to a building construction site, and strong enough to support the weight of the compression slab then cast onto it on the floor. site.
  • the production of a floor using such pre-slabs thus consists in first installing a set of pre-slabs resting on cross walls, facade or beams of the building, so to cover the entire surface of the floor to be made.
  • lifting devices In order to be able to handle the pre-slabs in the factory and on the site, they usually include lifting devices, one of which is illustrated in figure 1 . Such devices thus comprise a lifting loop 100 extended by two legs 101, 102 extending opposite one another.
  • a lower bed of prestressing wires 103 is placed in the bottom of a mold and then each lifting device on one of these wires. The lifting device is then made a quarter turn so that the legs 101, 102 of said device are found under the lower bed of prestressing wires and therefore that a prestressing wire is inside the loop; this wire securing the lifting device.
  • An upper bed of distribution reinforcements 104 is then placed on top of the assembly before concrete is poured into the mold to form the concrete body of the pre-slab.
  • the various lifting devices are found secured to the pre-slab with the legs 101, 102 of the lifting devices trapped in the concrete body and the loops 100 of the lifting devices protruding from the upper face of the pre-slab.
  • hooks of a lifting device, of the crane type are thus hooked to the various loops 100, which makes it possible to lift and then manipulate the pre-slabs in order to position them on the building under construction.
  • An object of the invention is to provide a lifting device for a construction element making it possible to limit a risk of said device being pulled out of the body of the construction element during the handling of the latter.
  • An object of the invention is also to provide a construction element provided with such a lifting device.
  • An object of the invention is also to provide a method of manufacturing such a construction element.
  • the presence of the two third parts makes it possible to better distribute in the construction element the forces undergone by the invention. level of invention.
  • the invention consequently makes it possible to limit a risk of cracking of the concrete around it when it is integrated into a construction element and consequently to limit a risk of it being torn off from said construction element.
  • the invention turns out to be small in size compared to the lifting devices of the prior art.
  • the invention proves to be particularly advantageous for small-sized pre-slabs (such as pre-slabs the width of which is less than 70 centimeters (cm)).
  • pre-slabs such as pre-slabs the width of which is less than 70 centimeters (cm)
  • the very bulky devices of the prior art needed to be largely offset from the edge of the pre-slabs of the prior art.
  • this made it difficult to handle the pre-slabs which could be lifted out of balance, that is to say not horizontal.
  • the invention being small, it turns out to be possible to better distribute the invention in the predalle for example by arranging the invention in the corners of the predalle.
  • the inventors have thus been able to develop prototypes having, for example, a length of between 25 and 40 centimeters and preferably between 25 and 35 centimeters, the length being for example 30 cm.
  • the third parts of the two branches extend parallel to each other.
  • at least one of the second parts forms an elbow.
  • at least one of the second parts comprises a curved portion extending at a level lower than that of the associated free end.
  • the two branches are identical.
  • the invention also relates to a construction element comprising a concrete body and at least one lifting device as mentioned above, at least the free ends of which are incorporated in the concrete body.
  • a construction element is prefabricated on a production site to be transported, for example, to a construction site of a building in order to to be installed there.
  • the construction element is a pre-slab.
  • the building element comprises at least four lifting devices each arranged in one of the respective four corners of the building element.
  • the third parts of the two branches extend on the same side of the lifting device.
  • the third parts of the two branches extend on the same side of the lifting loop.
  • the lifting device is entirely arranged under the frames of the lower bed.
  • the lifting device is arranged under a single frame of the lower bed.
  • the lifting device 1 comprises only two branches, namely a first branch 2 and a second branch 3.
  • the two branches 2, 3 are here identical to each other.
  • the lifting device 1 comprises a top 4, the two ends of which are extended respectively by the first branch 2 and the second branch 3.
  • the vertex 4 is rounded here.
  • the vertex 4 consequently forms an arc of a circle.
  • this top 4 is conformed so as to correspond to the shape which matches the shape of a lifting hook of a lifting device that one wishes to associate with said top 4.
  • the first branch 2 here consists of a first part 5, a second part 6 and a third part 7.
  • the first part 5 forms a free end of the first branch 2 and extends straight along a first axis A.
  • the first part 5 is extended by a second part 6 forming a junction zone between the third part 7 and the first part 5.
  • This second part 6 consists of a first arm for attaching to the first part 5, of a second arm for attaching to the third part 7 and a bent portion 8, ie a rounded portion, connecting the two arms.
  • the first arm does not extend here in the extension of the first part 5 and therefore does not extend along the first axis A.
  • the first arm draws a curve between the first part 5 and the bent portion 8, the junction between the first arm and the first part 5 being ensured by a fillet 9 avoiding too acute a connection between the first arm and the first part 5.
  • the first arm is curved downwards so as to s' expand under the first part 5.
  • the second arm extends along a second axis B orthogonal or inclined relative to the first axis A.
  • the second axis B is substantially vertical and the first axis A is substantially horizontal.
  • the third part 7 extends straight in turn along the second axis B between the second arm and the top 4.
  • the second branch 3 here consists of a first part 10, a second part 11 and a third part 12.
  • the first part 10 forms a free end of the second branch 3 and extends straight along a third axis C which is here parallel but not coincident with the first axis A.
  • the first part 10 is extended by a second part 11 forming a junction zone between the third part 12 and the first part 10.
  • This second part 11 consists of a first connecting arm to the first part 10, of a second connecting arm to the third part 12 and of a bent portion 13, ie a rounded portion, connecting the two arms.
  • the first arm does not extend in the extension of the first part 10 and therefore does not extend along the third axis C.
  • the first arm draws a curve between the first part 10 and the bent portion 13, the junction between the first arm and the first part 10 being ensured by a fillet 14 avoiding too acute a connection between the first arm and the first part 13.
  • the first arm is curved downwards so as to extend under the first part 10.
  • the second arm extends along a fourth axis D orthogonal or inclined relative to the third axis C.
  • the fourth axis D is substantially vertical and the third axis C substantially horizontal.
  • the third part 12 extends straight in turn along the fourth axis D between the second arm and the top 4.
  • the two free ends 5, 10 thus extend parallel to each other and in the same direction.
  • the two free ends 5, 10 are located side by side, i.e. the two free ends 5, 10 are on the same side of the lifting device 1.
  • the lifting device 1 is shaped so that the second parts 6, 11 extend the associated first parts 5, 10 by diverging from the plane which contains said first parts 5, 10.
  • the top 4 and the third parts 7, 12 therefore jointly define a lifting loop.
  • the lifting device 1 thus has the general shape of an arch extended by two legs (the two ends free 5, 10) extending in a direction inclined relative to the plane containing the arch and / or a direction orthogonal to said plane.
  • the two branches 2, 3 and the top 4 are in one piece.
  • the lifting device is formed from a single rod shaped as mentioned above as a top 4 extended at its two ends by the branches 2, 3.
  • the rod is a metal rod.
  • the rod is made of steel such as a B235C steel bar (conforming to the NFA35-015 standard of July 2019) or equivalent.
  • the lower bed of reinforcements Rinf is arranged at the bottom of a pre-slab mold M.
  • This lower bed Rinf is, in a manner known per se, formed of a succession of bars or wires extending parallel to each other in a general direction X, being spaced two by two by the same distance.
  • the lifting device 1 is made to pass under one of the frames of the lower bed before raising its free ends 5, 10 above the adjacent frames.
  • the curved shape of the first arms of the second parts 6, 11 of the device facilitates this tilting around one of the frames.
  • the two free ends 5, 10 extend orthogonally to the reinforcements.
  • the second arms of the second parts 6, 11, the third parts 7, 12 and the vertex 4 extend in the same plane which is here orthogonal to the plane containing the reinforcements.
  • the plane in which extend the second arms of the second parts 6, 11, the third parts 7, 12 and the top 4 is substantially vertical.
  • the frames extend below the lifting device 1 except for the only frame around which the lifting device has been tilted. This frame thus extends transversely to the lifting device 1 so as to rest on said lifting device.
  • This reinforcement extends here between the two second parts 6, 11 and for example between the bent portions 8, 13 of said second parts.
  • the lifting device is shaped so that its lifting loop extends substantially parallel to the reinforcements (according to a top view of the pre-slab).
  • at least four lifting devices 1, all identical to one another, are arranged in the mold M of the pre-slab.
  • a lifting device 1 is arranged at each corner of the mold M so as to be subsequently associated with one of the corners of the pre-slab.
  • the upper bed of reinforcements is placed on the lower bed Rinf of reinforcements and the lifting devices 1.
  • This upper bed is, in a manner known per se, formed of a succession of bars. extending parallel to each other in a general direction Y, being spaced two by two by the same distance.
  • General direction Y is substantially orthogonal to general direction X.
  • the reinforcements then extend substantially parallel to the free ends 5, 10.
  • a fourth step concrete is then poured into the mold M to form a concrete body of the predalle.
  • the concrete is of course poured so as to only partially cover the lifting devices 1.
  • the lifting devices 1 are shaped so that the free ends 5, 10, the second parts 6, 11 and a portion of the third parts. parts 7, 12 are included in the concrete body. In this way, only the top 4 and a portion of the third parts 7, 12 projecting from an upper face of the concrete body.
  • the very shape of the branches 2, 3 in arches of the various lifting devices 1 facilitates the bracing of the devices when they are lifted. This further limits a risk of concrete cracking at the level of the lifting devices 1.
  • the lifting devices 1 lie flat on the bottom of the world M thanks to the curved shape of their first arms. This makes it possible to facilitate the stabilization of the various lifting devices 1 in said mold M. This guarantees good altimetry of the devices 1 in the manufacturing mold M and therefore in the finished pre-slab. Consequently, a good coating of the lower portions of the lifting devices 1 is ensured in the predalle, in particular of the free ends 5, 10 in particular vis-à-vis the lower face of the predalle. The devices are therefore well established in depth in the predalle. This further limits a risk of concrete cracking at the level of the lifting devices 1.
  • This second embodiment is identical to the first embodiment except that the two branches 2, 3 do not have first curved arms but first straight arms.
  • the lifting device 1 comprises only two branches, namely a first branch 2 and a second branch 3.
  • the two branches 2, 3 are here identical to each other.
  • the lifting device 1 comprises a top 4, the two ends of which are extended respectively by the first branch 2 and the second branch 3.
  • the vertex 4 is rounded here.
  • the vertex 4 consequently forms an arc of a circle.
  • this top 4 is conformed so as to correspond to the shape which matches the shape of a lifting hook of a lifting device that one wishes to associate with said top 4.
  • the first branch 2 here consists of a first part 5, a second part 6 and a third part 7.
  • the first part 5 forms a free end of the first branch 2 and extends straight along a first axis A.
  • the first part 5 is extended by a second part 6 forming a junction zone between the third part 7 and the first part 6.
  • This second part 6 consists of a first arm for attachment to the first part 5, a second arm for attaching to the third part 7 and a bent portion 8 connecting the two arms.
  • the first arm therefore extends here in the extension of the first part 5 and consequently extends along the first axis A.
  • the second arm extends along a second axis B orthogonal or inclined relative to the second axis A.
  • the second axis B is substantially vertical and the first axis A is substantially horizontal.
  • the third part 7 extends straight in turn along the second axis B between the second arm and the top 4.
  • the second branch 3 here consists of a first part 10, a second part 11 and a third part 12.
  • the first part 10 forms a free end of the second branch 3 and extends straight along a third axis C which is here parallel but not coincident with the first axis A.
  • the first part 10 is extended by a second part 11 forming a junction zone between the third part 12 and the first part 10.
  • This second part 12 consists of a first arm for attachment to the first part 10, of a second arm for attaching to the third part 12 and a bent portion 13 connecting the two arms.
  • the first arm therefore extends here in the extension of the first part 5 and consequently extends along the third axis C.
  • the second arm extends along a fourth axis D orthogonal or inclined relative to the third axis C.
  • the fourth axis D is substantially vertical and the third axis C substantially horizontal.
  • the third part 12 extends straight in turn along the fourth axis D between the second arm and the top 4.
  • the two free ends 5, 10 thus extend parallel to each other and in the same direction.
  • the two free ends 5, 10 are located side by side, i.e. the two free ends 5, 10 are on the same side of the lifting device 1.
  • the lifting device 1 is shaped so that the second parts 6, 11 extend the associated first parts 5, 10 by diverging from the plane which contains said first parts 5, 10.
  • the top 4 and the third parts 7, 12 therefore jointly define a lifting loop.
  • the lifting device 1 thus has the general shape of an arch extended by two legs (the two free ends 5, 10 of the branches) extending in a direction inclined relative to the plane containing the arch and / or a direction orthogonal to said plane. .
  • the two branches 2, 3 and the top 4 are in one piece.
  • the lifting device 1 is formed of a single rod shaped as mentioned above as a top 4 extended at its two ends by the branches 2, 3.
  • the rod is a metal rod.
  • the rod is made of steel such as a B235C steel bar (conforming to the NFA35-015 standard of July 2019) or equivalent.
  • the lifting device 1 When the lifting device 1 is placed flat horizontally, the lifting device 1 rests on its free ends 5, 10 and possibly on the first arms.
  • the lower bed of reinforcements Rinf is arranged at the bottom of a pre-slab mold M.
  • This lower bed Rinf is, in a manner known per se, formed of a succession of reinforcements extending parallel to each other in a general direction X, being spaced two by two by the same distance.
  • the free ends 5, 10 of the lifting device 1 are passed under the reinforcements.
  • the two free ends 5, 10 extend orthogonally to the reinforcements.
  • the second arms of the second parts 6, 11, the third parts 7, 12 and the vertex 4 extend in the same plane which is here orthogonal to the plane containing the reinforcements.
  • the plane in which extend the second arms of the second parts 6, 11, the third parts 7, 12 and the top 4 is substantially vertical.
  • the frames of the lower bed extend above the lifting device 1.
  • several frames 1 extend transversely to the lifting device 1 so as to rest on said lifting device 1.
  • at least one of these reinforcements extend here between the two second parts 6, 11 and for example between the bent portions 8, 13 of said second parts 6, 11.
  • the lifting device 1 is shaped so that its lifting loop extends substantially parallel to the reinforcements (according to a top view of the pre-slab).
  • at least four lifting devices 1, all identical to one another, are arranged in the mold M of the pre-slab.
  • a lifting device 1 is arranged at each corner of the mold M so as to be subsequently associated with one of the corners of the pre-slab.
  • This bed upper Rsup is, in a manner known per se, formed of a succession of bars extending parallel to each other in a general direction Y, being spaced two by two by the same distance.
  • General direction Y is substantially orthogonal to general direction X.
  • the reinforcements then extend substantially parallel to the free ends 5, 10.
  • a fourth step concrete is then poured into the mold to form a concrete body of the pre-slab.
  • the concrete is of course poured so as to only partially cover the lifting devices 1.
  • the lifting devices 1 are shaped so that the free ends 5, 10, the second parts 6, 11 and a portion of the third parts. parts 7, 12 are included in the concrete body. In this way, only the top 4 and a portion of the third parts 7, 12 projecting from an upper face of the concrete body.
  • the very shape of the branches 2, 3 in arches of the various lifting devices 1 facilitates the bracing of the lifting devices 1 when they are raised. This further limits a risk of concrete cracking at lifting devices 1.
  • the lifting devices 1 rest flat on the bottom of the earth thanks to their free end 5, 10. This makes it possible to facilitate the stabilization of the various lifting devices 1 in said mold M. This guarantees good altimetry of the devices. 1 in the manufacturing mold M and therefore in the finished pre-slab. Consequently, a good coating of the lower portions of the lifting devices 1 is ensured in the pre-slab, in particular of the free ends 5, in particular vis-à-vis the lower face of the pre-slab. The lifting devices 1 are therefore well established in depth in the pre-slab. This further limits a risk of concrete cracking at the level of the lifting devices 1.
  • the construction element is a pre-slab
  • the construction element associated with one or more lifting devices may be different and thus for example be a plate or any other element with a low concrete body. thickness.
  • the construction element may be a pre-stressed pre-slab (in the case of a pre-stressed pre-slab, the lower network of reinforcements will be a lower network of prestressed wires and the upper network an upper network of bars. distribution) or a reinforced concrete pre-slab.
  • the device may have a different number of branches than what has been indicated, provided that at least two are included. Likewise, each branch may have more parts than what has been indicated.
  • branches are identical to each other, some or all of the branches may be different from one another. Just as here the parts of branches are identical two by two, the parts may be different two by two.
  • the construction element will include several lifting devices, it may include devices which are all identical to one another or partially identical to one another or all to be different from one another.
  • the devices may all be arranged in the same way or may partially be arranged in the same way or may all be arranged differently in the construction element.
  • the second parts will preferably be distinct from each other.
  • the second parts will preferably be spaced apart from each other. Preferably, the second parts will not touch each other.
  • the process may be different from what has been described.
  • the device rest on the bottom of the mold directly, we can arrange the device in another way in the mold for manufacturing the construction element.
  • the device could be placed on the lower bed of reinforcements or else it could be placed on one or more coating wedges resting itself (s) in the bottom of the mold.
  • the lower reinforcement bed may itself rest on the bottom of the mold or preferably be placed at a given distance from the bottom of the mold. This can be achieved either using one or more shims (for example if the bed consists of reinforcing bars as is the case for a reinforced concrete pre-slab) or by placing in tension of said bed (for example if the bed is made of prestressing wires as is the case for a prestressed pre-slab).
  • the various options, variants and embodiments described can be combined with one another.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Mechanical Engineering (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Conveying And Assembling Of Building Elements In Situ (AREA)
EP21162098.4A 2020-03-13 2021-03-11 Hubvorrichtung für bauelement, entsprechendes bauelement und herstellungsverfahren Withdrawn EP3879046A1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR2002504A FR3108129B1 (fr) 2020-03-13 2020-03-13 Dispositif de levage pour élément de construction, élément de construction et procédé de fabrication correspondants

Publications (1)

Publication Number Publication Date
EP3879046A1 true EP3879046A1 (de) 2021-09-15

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EP21162098.4A Withdrawn EP3879046A1 (de) 2020-03-13 2021-03-11 Hubvorrichtung für bauelement, entsprechendes bauelement und herstellungsverfahren

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FR (1) FR3108129B1 (de)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3322646A1 (de) * 1982-08-26 1984-03-08 Gebr. Philipp GmbH, 8750 Aschaffenburg Seil-transportanker und verfahren zur herstellung
BE1016424A6 (nl) * 2005-01-24 2006-10-03 Echo Hijshaak voor het opnemen van een geprefabriceerd betonelement.
DE202015105138U1 (de) * 2014-10-10 2015-10-08 B. Lütkenhaus GmbH Wand-Transportanker und damit ausgestattetes Fertigwandelement
US20170247892A1 (en) * 2016-02-29 2017-08-31 Midwest Concrete Masonry and Supply, Inc. Lifting anchor for precast concrete structures

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3322646A1 (de) * 1982-08-26 1984-03-08 Gebr. Philipp GmbH, 8750 Aschaffenburg Seil-transportanker und verfahren zur herstellung
BE1016424A6 (nl) * 2005-01-24 2006-10-03 Echo Hijshaak voor het opnemen van een geprefabriceerd betonelement.
DE202015105138U1 (de) * 2014-10-10 2015-10-08 B. Lütkenhaus GmbH Wand-Transportanker und damit ausgestattetes Fertigwandelement
US20170247892A1 (en) * 2016-02-29 2017-08-31 Midwest Concrete Masonry and Supply, Inc. Lifting anchor for precast concrete structures

Also Published As

Publication number Publication date
FR3108129A1 (fr) 2021-09-17
FR3108129B1 (fr) 2022-07-29

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