EP1555100A1 - Procédé de fabrication de dalles alvéolées en béton précontraint ainsi que dalles obtenues suite à la mise en oeuvre de ce procédé - Google Patents
Procédé de fabrication de dalles alvéolées en béton précontraint ainsi que dalles obtenues suite à la mise en oeuvre de ce procédé Download PDFInfo
- Publication number
- EP1555100A1 EP1555100A1 EP20050300033 EP05300033A EP1555100A1 EP 1555100 A1 EP1555100 A1 EP 1555100A1 EP 20050300033 EP20050300033 EP 20050300033 EP 05300033 A EP05300033 A EP 05300033A EP 1555100 A1 EP1555100 A1 EP 1555100A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- lifting
- concrete
- handling
- loops
- strands
- 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.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims abstract description 21
- 239000011513 prestressed concrete Substances 0.000 title claims description 13
- 238000004519 manufacturing process Methods 0.000 title claims description 9
- 239000004567 concrete Substances 0.000 claims abstract description 35
- 239000002184 metal Substances 0.000 claims abstract description 9
- 229910052751 metal Inorganic materials 0.000 claims abstract description 9
- 238000005266 casting Methods 0.000 claims description 12
- 229910000831 Steel Inorganic materials 0.000 claims description 8
- 230000003014 reinforcing effect Effects 0.000 claims description 8
- 239000010959 steel Substances 0.000 claims description 8
- 238000011144 upstream manufacturing Methods 0.000 claims description 5
- 238000009415 formwork Methods 0.000 claims description 2
- 238000005482 strain hardening Methods 0.000 claims description 2
- 230000035515 penetration Effects 0.000 claims 1
- 230000000284 resting effect Effects 0.000 claims 1
- 238000005452 bending Methods 0.000 description 3
- 210000000056 organ Anatomy 0.000 description 3
- 230000002787 reinforcement Effects 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 230000001413 cellular effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 210000000003 hoof Anatomy 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 235000000396 iron Nutrition 0.000 description 1
- 230000036316 preload Effects 0.000 description 1
- 239000011150 reinforced concrete Substances 0.000 description 1
Images
Classifications
-
- 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
- B28B23/0062—Arrangements specially adapted for the production of shaped articles with elements wholly or partly embedded in the moulding material; Production of reinforced objects forcing the elements into the cast material, e.g. hooks into cast concrete
-
- 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
- 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
- E04G21/145—Means in or on the elements for connecting same to handling apparatus specific for hollow plates
Definitions
- the present invention relates to a method of manufacture of a series of hollow concrete slabs prestressed by irons or strands longitudinal reinforcement placed between the cells at the bottom slabs, on a prestressed bench of great length and predetermined width.
- Such slabs have the advantage of being cast not on construction sites but in factories before being transported and delivered as a rule by truck; as a result, their manufacture is not dependent possible weather.
- These slabs usually have a standard width approximately 1.20 m and a variable length adapted to the range, reach up to 20 meters, and have at their inner part from 5 to 11 longitudinal cells. They are manufactured on prestressing benches of great length (of the order of 150 m) and having a corresponding width slabs by a largely automated process.
- sliding formwork which moves continuously along the prestressing bench.
- the hollow core slabs in prestressed concrete sets up the reinforcing strands parallel to one another, one individually puts them in tension as a rule using jacks, then the concrete is poured on heights which can vary between about 12 and 40 cm using the sliding form casting device that moves continuously along the prestressing bench, the slabs are cut to length desired, and after the setting of the concrete, the strands are cut to put the latter in prestressing.
- the first of these methods consists in suspending the hook crane a large metal beam called rudder equipped at its ends pliers to grab a slab.
- the second lifting process consists of hanging on the hook of the crane a four-legged sling whose ends are respectively introduced into four through-holes provided for this purpose effect at the four corners of the slabs.
- Two metal bars respectively threaded at the ends of two associated strands, below the slabs allow the maintenance of these.
- Such a method has the disadvantage of requiring drilling on the slabs of four through holes to be then closed.
- the object of the invention is to remedy the disadvantages known lifting methods of hollow core slabs prestressed concrete.
- the idea behind the invention was to incorporate these slabs lifting and handling devices allowing seize them by means of a crane, during their manufacturing process by pouring concrete.
- brackets from lifting to conventional reinforced concrete slabs during their process Manufacturing.
- lifting and handling devices adapted to such slabs must meet particular constraints; in particular, during the manufacture of the slabs by means of casting devices slipforms, these bodies must be able to pass between the hooves vibrators and profiled cores.
- the invention relates to a manufacturing process a series of prestressed concrete hollow core slabs of the type mentioned above using a slip-form casting device, characterized in that upstream of the casting device of the concrete in the direction of movement of this device is twisted by torsion, on two strands preferably located essentially symmetrically with respect to to the median longitudinal axis of the prestressing bench at locations corresponding to the corners of the slabs, a series of lifting loops and handling each constituted by a bent metal rod comprising on the one hand at its central part a median bend defining a gripping ring plane intended to protrude at the top of the slab, and on the other hand at its respective ends lateral bends extending substantially symmetrically on both sides of the bend median and defining positioning tabs supported by the pretensioning bench as well as fixing brackets essentially in U-shape located in a plane substantially perpendicular to the plane of the gripping ring and allowing the torsion clipping of the buckle lifting and handling along the associated strand
- the fixing of the lifting and handling on the associated strands can be carried out manually or to be automated.
- Such clearance can be achieved by digging concrete around these ends after the casting step, when the concrete is still fresh.
- the slabs are equipped to their four corners of lifting and handling loops including bending median is flush with its top end to the concrete surface.
- slabs can thus be grasped by a lifting device with a four-legged sling suspended from the hook of a crane.
- the lifting and handling loops are usually fixed on the two penultimate strands from lateral edges of the slabs.
- the invention also relates to a cellular slab in prestressed concrete by longitudinal iron or longitudinal reinforcing wire in place between the cells, at the bottom of the slab.
- Such a slab is characterized in that it is equipped with level of its four corners a fixed lifting and handling loop on an associated strand and constituted by a bent metal rod comprising on the one hand at its central part a median bend defining a gripping ring plane protruding at the top of the slab, this gripping ring and the associated strand being essentially coplanar, and on the other hand at its respective ends lateral bends extending essentially symmetrically on both sides of the median bend and defining positioning tabs allowing the precise placement of the lifting and handling loop on the bench of prestressing on which is poured the concrete, before this casting, as well as essentially U-shaped mounting brackets located in a plane essentially perpendicular to the plane of the gripping ring and allowing the torsion clipping of the lifting and handling loop along the associated reinforcing strand, on both sides of this strand.
- such a slab can be obtained by placing of the aforementioned method or by a different method.
- this diameter is less than 14 mm, and preferably between 8 and 12 mm.
- the bent rods constituting lifting and handling loops are made of steel with a minimum tensile strength of the order of 300 MPa, preferably at least 400 MPa, and advantageously up to 700 MPa, and in parallel ductility sufficient to avoid the risk of breakage.
- This constraint requires the use of special steels in particular undergone a work hardening treatment.
- the slab 1 is made of prestressed concrete by longitudinal reinforcing strands 2 protruding at its ends and is equipped with a series of longitudinal cells 3.
- the number of seven cells and six strands of reinforcement chosen by way of example is of course in no way limiting to the invention.
- each of the concrete strips 4 separating two cells 3 is not necessarily equipped with a strand 2.
- the slab 1 is equipped on its upper face 5 and at its four corners four loops of lifting and respective handling 6 flush with the surface of the concrete and having for function of allowing the slab 1 to be grasped by a Lifting not shown with a suspended four-legged sling the hook of a crane.
- each of the lifting and handling loops 6 is clipped on an associated strand 2 before pouring concrete.
- the lifting loop 6 is more precisely constituted by a bent metal rod having a diameter of the order of 8 to 12 mm and made of special steel with minimum tensile strength in the order of 400 MPa and at the same time sufficient ductility to avoid the risk of breakage.
- This metal rod 6 comprises firstly at its central portion a median bend 7 and secondly at its respective ends of lateral bends 8, 8 'extending essentially symmetrically from on both sides of the median bend 7.
- the median bend 7 defines a planar gripping ring protruding from its end on the upper face 5 of the slab 1 as shown in FIG.
- the gripping ring 7 and the associated strand 2 are essentially coplanar.
- the positioning tabs 9, 9 'thus allow the precise placement of the lifting and handling loop 6.
- the positioning tabs 9, 9 ' are directly contiguous to essentially U-shaped fixing brackets 10, 10 'which are located in a plane essentially perpendicular to the plane of the gripping ring 7.
- the fixing brackets 10, 10 allow the clipping by torsion of the lifting and handling loop 6 along the strand associated reinforcement 2, on either side of this strand, in the position shown in Figure 2.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Architecture (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Manufacturing Of Tubular Articles Or Embedded Moulded Articles (AREA)
Abstract
Description
- des guide fils assurant le maintien des torons,
- des organes de coulage de la couche inférieure des dalles, cette couche étant située au-dessous des alvéoles et renfermant les torons d'armature,
- des sabots vibreurs,
- des noyaux profilés déplaçables longitudinalement en va et vient permettant l'obtention des alvéoles longitudinales et coopérant avec des organes de coulage des bandes de béton séparant les alvéoles,
- des patins permettant de vibrer ces bandes en béton,
- des organes de coulage de la couche supérieure des dalles situées au-dessus des alvéoles,
- une table vibrante.
- la figure 1 est une vue en perspective d'une dalle alvéolée en béton précontraint ;
- la figure 2 est une vue en perspective d'une boucle de levage et de manutention mise en place sur un toron.
Claims (8)
- Procédé de fabrication d'une série de dalles alvéolées en béton précontraint par des fers ou torons d'armature longitudinaux mis en place entre les alvéoles, à la partie inférieure des dalles, sur un banc de précontrainte de grande longueur et de largeur prédéterminée par lequel on met en place les torons d'armature parallèlement les uns aux autres, on les met individuellement en tension notamment à l'aide de vérins, puis on coule le béton à l'aide d'un dispositif de coulage particulier connu en lui-même dit à coffrages glissants qui se déplace en continu le long du banc de précontrainte, on coupe les dalles à la longueur souhaitée, et après la prise du béton, on coupe les torons de façon à mettre ce dernier en précontrainte,
caractérisé en ce que
en amont du dispositif de coulage du béton, dans le sens de déplacement de ce dispositif, on clipse par torsion sur deux torons (2) latéraux situés de préférence essentiellement symétriquement par rapport à l'axe longitudinal médian du banc de précontrainte, à des emplacements correspondant au coin des dalles (1), une série de boucles de levage et de manutention (6) constituées chacune par une tige métallique coudée comportant d'une part à sa partie centrale un coudage médian (7) définissant un anneau de préhension plan destiné à faire saillie à la partie supérieure (5) de la dalle (1), et d'autre part à ses extrémités respectives, des coudages latéraux (8, 8') s'étendant essentiellement symétriquement de part et d'autre du coudage médian (7) et définissant des pattes de positionnement (9, 9') prenant appui sur le banc de précontrainte ainsi que des étriers de fixation (10, 10') essentiellement en forme de U situés dans un plan essentiellement perpendiculaire au plan de l'anneau de préhension (7) et permettant le clipsage par torsion de la boucle de levage et de manutention (6) le long du toron (2) associé, de part et d'autre de ce toron, dans une position dans laquelle l'anneau de préhension (7) et le toron (2) associé sont essentiellement coplanaires. - Procédé selon la revendication 1,
caractérisé en ce que
après l'étape de coulage du béton, on dégage l'extrémité supérieure du coudage médian (7) des boucles de levage et de manutention (6) en creusant le béton autour de celle-ci. - Procédé selon l'une quelconque des revendications 1 et 2,
caractérisé en ce que
l'on clipse les boucles de levage et de manutention (6) sur les deux avant-derniers torons (2) à partir des bords latéraux du banc de précontrainte. - Procédé selon l'une quelconque des revendications 1 à 3,
caractérisé en ce que
lors de l'étape de coulage du béton, on exerce une pression sur les torons (2) associés aux boucles de levage et de manutention (6), en amont et en aval de ces boucles, de façon à les maintenir en place lors de leur pénétration dans le béton. - Dalle alvéolée en béton précontraint par des fers ou torons d'armature longitudinaux mis en place entre les alvéoles, à la partie inférieure de la dalle, obtenue par la mise en oeuvre du procédé selon l'une quelconque des revendications 1 à 4,
caractérisée en ce qu'
elle est équipée au niveau de ses quatre coins de boucles de levage et de manutention (6) fixées sur des torons (2) associés et constituée chacune par une tige métallique coudée comportant d'une part à sa partie centrale un coudage médian (7) définissant un anneau de préhension plan faisant saillie à la partie supérieure (5) de la dalle (1), cet anneau de préhension (7) et le toron (2) associé étant essentiellement coplanaires, et d'autre part à ses extrémités respectives des coudages latéraux (8, 8') s'étendant essentiellement symétriquement de part et d'autre du coudage médian (7) et définissant des pattes de positionnement (9, 9') permettant la mise en place précise de la boucle de levage et de manutention (6) sur le banc de précontrainte sur lequel est coulé le béton, préalablement à ce coulage, ainsi que des étriers de fixation (10, 10') essentiellement en forme de U situés dans un plan essentiellement perpendiculaire au plan de l'anneau de préhension (7) et permettant le clipsage par torsion de la boucle de levage et de manutention (6) le long du toron (2) associé, de part et d'autre de ce toron. - Dalle alvéolée en béton précontraint selon la revendication 5,
caractérisée en ce que
le diamètre des tiges coudées constitutives des boucles de levage et de manutention (6) est inférieur à 14 mm, de préférence compris entre 8 et 12 mm. - Dalle alvéolée en béton précontraint selon la revendication 6,
caractérisée en ce que
les tiges coudées constitutives des boucles de levage et de manutention (6) sont réalisées en un acier ayant une résistance à la traction au minimum de l'ordre de 300 MPa et de préférence d'au moins 400 MPa et parallèlement une ductilité suffisante pour éviter les risques de rupture. - Dalle alvéolée en béton précontraint selon la revendication 7,
caractérisée en ce que
l'acier dans lequel sont réalisées les tiges coudées constitutives des boucles de levage et de manutention (6) est un acier spécial ayant subi un traitement d'écrouissage.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR0400341 | 2004-01-15 | ||
| FR0400341A FR2865228B1 (fr) | 2004-01-15 | 2004-01-15 | Procede de fabrication de dalles alveolees en beton precontraint equipees de boucles de levage et de manutention ainsi que dalles obtenues suite a la mise en oeuvre de ce procede |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1555100A1 true EP1555100A1 (fr) | 2005-07-20 |
| EP1555100B1 EP1555100B1 (fr) | 2018-10-31 |
Family
ID=34610773
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP05300033.7A Expired - Lifetime EP1555100B1 (fr) | 2004-01-15 | 2005-01-14 | Procédé de fabrication de dalles alvéolées en béton précontraint ainsi que les dalles obtenues suite à la mise en oeuvre de ce procédé |
Country Status (2)
| Country | Link |
|---|---|
| EP (1) | EP1555100B1 (fr) |
| FR (1) | FR2865228B1 (fr) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2885548A1 (fr) * | 2005-05-10 | 2006-11-17 | Guimard Ets | Procede permettant d'incorporer des epingles de levage et de manutention dans des dalles alveolees en beton precontraint ainsi que dalle obtenue suite a la mise en oeuvre de ce procede |
| FR2905397A1 (fr) * | 2006-08-30 | 2008-03-07 | Kp1 Soc Par Actions Simplifiee | Dalle alveolee pourvue d'au moins un anneau de levage. |
| WO2008097102A1 (fr) * | 2007-02-08 | 2008-08-14 | Selvaag Spinoff As | Element de construction |
| EP2075392A1 (fr) | 2007-12-24 | 2009-07-01 | Echo | Élément préfabriqué en béton |
| EP2090415A1 (fr) * | 2008-02-18 | 2009-08-19 | Kp1 | Procédé de fabrication d'une poutre treillis |
| US7992281B2 (en) | 2006-07-12 | 2011-08-09 | Elematic Group Oy | Method and apparatus for attaching a lifting lug to a concrete product |
| US20130234460A1 (en) * | 2012-03-12 | 2013-09-12 | Elematic Oy Ab | Method and apparatus for the installation of a lifting loop, and part forming a lifting loop |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1011036A (en) * | 1963-09-24 | 1965-11-24 | Dow Mac Products Ltd | Improvements in or relating to the production of hollow concrete articles |
| US5388804A (en) * | 1993-07-19 | 1995-02-14 | Cohen; Jack H. | Anchor bolt holder-spacer |
| JP2002349006A (ja) * | 2001-05-24 | 2002-12-04 | Miyoujiyou Cement Kk | 段差スラブ成形用コンクリート版及びこれを用いた段差スラブ構造及びその製造方法 |
| US20030170093A1 (en) * | 2000-04-27 | 2003-09-11 | David Janeway | Fastening device with adjustable fastening surface embedded in cast panel or other products |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DK168695B1 (da) * | 1991-08-30 | 1994-05-24 | Betonelement A S | Transportbøjle til ekstruderede betonelementer |
| FR2822868B1 (fr) * | 2001-03-28 | 2004-04-16 | Bernard Legeai | Dalle alveolee et procede de fabrication |
| FR2833285B1 (fr) * | 2001-12-10 | 2004-10-01 | Applic Composants Guiraud Frer | Procede de mise en place de moyens de levage dans des dalles precontraintes alveolees |
-
2004
- 2004-01-15 FR FR0400341A patent/FR2865228B1/fr not_active Expired - Lifetime
-
2005
- 2005-01-14 EP EP05300033.7A patent/EP1555100B1/fr not_active Expired - Lifetime
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1011036A (en) * | 1963-09-24 | 1965-11-24 | Dow Mac Products Ltd | Improvements in or relating to the production of hollow concrete articles |
| US5388804A (en) * | 1993-07-19 | 1995-02-14 | Cohen; Jack H. | Anchor bolt holder-spacer |
| US20030170093A1 (en) * | 2000-04-27 | 2003-09-11 | David Janeway | Fastening device with adjustable fastening surface embedded in cast panel or other products |
| JP2002349006A (ja) * | 2001-05-24 | 2002-12-04 | Miyoujiyou Cement Kk | 段差スラブ成形用コンクリート版及びこれを用いた段差スラブ構造及びその製造方法 |
Non-Patent Citations (1)
| Title |
|---|
| PATENT ABSTRACTS OF JAPAN vol. 2003, no. 04 2 April 2003 (2003-04-02) * |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2885548A1 (fr) * | 2005-05-10 | 2006-11-17 | Guimard Ets | Procede permettant d'incorporer des epingles de levage et de manutention dans des dalles alveolees en beton precontraint ainsi que dalle obtenue suite a la mise en oeuvre de ce procede |
| EP1878854A3 (fr) * | 2006-07-12 | 2014-04-02 | Elematic Oy Ab | Procédé et appareil pour fixer un crochet de levage dans un produit en béton |
| US7992281B2 (en) | 2006-07-12 | 2011-08-09 | Elematic Group Oy | Method and apparatus for attaching a lifting lug to a concrete product |
| WO2008025894A3 (fr) * | 2006-08-30 | 2008-04-17 | Kp1 | Dalle alveolee pourvue d'au moins un anneau de levage |
| FR2905397A1 (fr) * | 2006-08-30 | 2008-03-07 | Kp1 Soc Par Actions Simplifiee | Dalle alveolee pourvue d'au moins un anneau de levage. |
| WO2008097102A1 (fr) * | 2007-02-08 | 2008-08-14 | Selvaag Spinoff As | Element de construction |
| EP2075392A1 (fr) | 2007-12-24 | 2009-07-01 | Echo | Élément préfabriqué en béton |
| EP2090415A1 (fr) * | 2008-02-18 | 2009-08-19 | Kp1 | Procédé de fabrication d'une poutre treillis |
| US20130234460A1 (en) * | 2012-03-12 | 2013-09-12 | Elematic Oy Ab | Method and apparatus for the installation of a lifting loop, and part forming a lifting loop |
| CN103302745A (zh) * | 2012-03-12 | 2013-09-18 | 艾乐迈铁科公司 | 安装提升环的方法和设备以及提升环成型零件 |
| US8875448B2 (en) * | 2012-03-12 | 2014-11-04 | Elematic Oy Ab | Method and apparatus for the installation of a lifting loop, and part forming a lifting loop |
| CN103302745B (zh) * | 2012-03-12 | 2016-03-02 | 艾乐迈铁科集团 | 安装提升环的方法和设备以及提升环成型零件 |
| RU2645034C2 (ru) * | 2012-03-12 | 2018-02-15 | Элематик Ойй | Способ и устройство для установки монтажной петли и элемент, образующий монтажную петлю |
Also Published As
| Publication number | Publication date |
|---|---|
| FR2865228A1 (fr) | 2005-07-22 |
| EP1555100B1 (fr) | 2018-10-31 |
| FR2865228B1 (fr) | 2006-03-24 |
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