EP1555100B1 - Verfahren zur Herstellung von Hohlraumplatten aus Spannbeton und daraus hergestellten Hohlraumplatten - Google Patents

Verfahren zur Herstellung von Hohlraumplatten aus Spannbeton und daraus hergestellten Hohlraumplatten Download PDF

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Publication number
EP1555100B1
EP1555100B1 EP05300033.7A EP05300033A EP1555100B1 EP 1555100 B1 EP1555100 B1 EP 1555100B1 EP 05300033 A EP05300033 A EP 05300033A EP 1555100 B1 EP1555100 B1 EP 1555100B1
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EP
European Patent Office
Prior art keywords
concrete
lifting
loops
slabs
handling
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.)
Expired - Lifetime
Application number
EP05300033.7A
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English (en)
French (fr)
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EP1555100A1 (de
Inventor
Adel Jabbour
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.)
Groupe Soprel
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Groupe Soprel
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Publication of EP1555100A1 publication Critical patent/EP1555100A1/de
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    • 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 manufacturing a series of hollow core slabs of prestressed concrete by longitudinal reinforcing bars or strands placed between the cells, at the lower part of the slabs, on a prestressing bench of great length and of 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; consequently, their manufacture is not dependent on any bad weather.
  • These slabs usually have a standard width of about 1.20 m and a variable length adapted to the range, up to 20 meters, and have in their internal part 5 to 11 longitudinal cells. They are manufactured on prestressing benches of great length (of the order of 150 m) and having a width corresponding to that of the slabs by a largely automated process.
  • sliding formwork is frequently used which moves continuously along the prestressing bench.
  • the reinforcing strands are placed in parallel with one another, it is tensioned as a general rule with the aid of jacks, and then the concrete is poured on heights which can vary between approximately 12 and 40 cm using the sliding form casting device which moves continuously along the prestressing bench, cut the slabs to the desired length, and after setting the concrete, cut the strands so as to put the latter prestressing.
  • the first of these methods is to suspend the hook of the crane a large metal beam called rudder equipped at its ends clamps for gripping a slab.
  • the second lifting method is to suspend from the crane hook a four-strand sling whose ends are respectively introduced into four through holes provided for this purpose at the four corners of the slabs.
  • Two metal bars respectively strung at the ends of two associated strands, below the slabs allow the maintenance thereof.
  • Such a method has the disadvantage of requiring drilling on the slabs of four through holes which must then be plugged.
  • FR -A-2,833,285 discloses a method of manufacturing hollow core slabs comprising lifting and handling loops, as well as a prestressed concrete hollow core slab.
  • the object of the invention is to overcome the disadvantages of known lifting methods of hollow core slabs prestressed concrete.
  • the idea underlying the invention was to incorporate in these slabs lifting and handling devices for gripping by means of a crane, during their manufacturing process by pouring concrete.
  • lifting and handling devices adapted to such slabs must meet particular constraints; in particular, during the manufacture of the slabs using slipform casting devices, these bodies must be able to pass between the vibrating shoes and profiled cores.
  • the invention relates to a method of manufacturing a series of hollow slabs according to claim 1, and a slab according to claim 5.
  • the fixing of the lifting and handling loops on the associated strands can be carried out manually or be automated.
  • Such clearance can be achieved by digging the concrete around these ends after the pouring step, when the concrete is still fresh.
  • the slabs are equipped at their four corners lifting loops and handling whose median bend is flush with its upper end to the surface of the concrete.
  • slabs can thus be grasped by a lifting device comprising a four-strand sling suspended from the hook of a crane.
  • the lifting and handling loops are generally fixed on the two penultimate strands from the lateral edges of the slabs.
  • the lifting and handling loops are perfectly locked and do not risk being dragged into the concrete during casting.
  • the invention also relates to a hollow concrete slab prestressed by longitudinal iron or reinforcing strands placed between the cells at the bottom of the slab.
  • Such a slab has the features of claim 5.
  • 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 a steel having a tensile strength of at least 300 MPa, preferably at least 400 MPa, and can advantageously go up to 700 MPa, and parallel ductility sufficient to avoid the risk of rupture.
  • the slab 1 is made of a concrete prestressed by longitudinal reinforcing strands 2 projecting at its ends and is equipped with a series of longitudinal recesses 3.
  • 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 surface 5 and at its four corners with four lifting and handling loops 6 flush with the surface of the concrete and having the function of allowing the slab 1 can be grasped by a device not shown lifting comprising a four-strand sling suspended from the hook of a crane.
  • each of the lifting and handling loops 6 is clipped onto an associated strand 2 before pouring the 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 a special steel having a tensile strength of at least 400 MPa and parallel to a sufficient ductility to avoid the risk of breakage.
  • This metal rod 6 comprises firstly at its central part a median bend 7 and secondly at its respective ends lateral bends 8, 8 'extending substantially symmetrically on either side of the median bend 7.
  • the median bend 7 defines a planar gripping ring as shown in FIG. figure 1 .
  • the gripping ring and the associated strand 2 are essentially coplanar.
  • the positioning tabs 9, 9 'thus enable the precise positioning 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 situated in a plane substantially perpendicular to the plane of the gripping ring.
  • the fixing brackets 10, 10 allow the torsion clipping of the lifting and handling loop 6 along the associated reinforcing bar 2, on either side of this strand, in the position shown in FIG. figure 2 .

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  • 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)

Claims (8)

  1. Verfahren zur Herstellung einer Reihe von Hohlraumplatten aus einem Beton, der durch längslaufende Armierungseisen oder
    - litzen vorgespannt ist, die zwischen den Hohlräumen an dem unteren Teil dieser Platten auf einem Vorspanntisch mit einer Länge von ungefähr 150 m und einer Breite, die der Breite der Hohlräume entspricht, aufweist, eingesetzt werden, wobei die Armierungslitzen parallel zueinander angebracht und individuell, insbesondere mit Zylindern, gespannt werden, wobei der Beton dann anhand einer an sich bekannten, besonderen Vorrichtung zum Gießen mit sogenannter Gleitschalung, welche sich kontinuierlich entlang des Vorspanntisches bewegt, gegossen wird, wobei die Platten mit der gewünschten Länge geschnitten werden, und wobei nach dem Abbinden des Betons die Litzen derart geschnitten werden, um den Beton vorzuspannen,
    umfassend folgende Schritte:
    - Hebe- und Beförderungsschlaufen (6) werden bereitgestellt, welche jeweils durch einen knieförmigen Metallstab gebildet sind, der einerseits an seinem zentralen Teil eine Mittelkröpfung (7), die einen ebenen Handhabering definiert, und andererseits an seinen jeweiligen Enden, Seitenkröpfungen (8), die sich im Wesentlichen symmetrisch an beiden Seiten der Mittelkröpfung (7) erstrecken, aufweist, wobei die Seitenkröpfungen an den Enden der Schlaufe
    Positionierungslaschen (9, 9') definieren, die unmittelbar an Befestigungsbügel (10, 10') angrenzen, welche im Wesentlichen U-förmig ausgebildet und in einer im Wesentlichen senkrecht zu der Ebene des Handhaberinges laufenden Ebene angeordnet sind, und
    - vor dem Schritt des Abbinden des Betons, vor der Vorrichtung zum Gießen, in die Bewegungsrichtung der Vorrichtung, wird eine Reihe von Hebe- und Beförderungsschlaufen (6) entlang zwei seitlichen Litzen (2), die vorzugsweise im Wesentlichen symmetrisch gegenüber der mittleren Längsachse des Vorspanntisches angeordnet sind, an beiden Seiten dieser Litzen, an Stellen, die den Ecken der Platten (1) entsprechen, durch Verdrehung aufgesteckt, sodass der Handhabering jeder Schlaufe (6) und die damit verbundene Litze im Wesentlichen komplanar sind, und dass sich deren Positionierungslaschen (9, 9') auf den Vorspanntisch stützen, und
    - der Beton wird gegossen, sodass die Mittelkröpfung der Hebe- und Beförderungsschlaufen, mit ihrem oberen Ende an dessen Oberfläche zutage liegt.
  2. Verfahren nach Anspruch 1,
    dadurch gekennzeichnet, dass
    nach dem Schritt des Betongießens das obere Ende der Mittelkröpfung (7) der Hebe- und Beförderungsschlaufen (6) freigelegt wird, indem der Beton um sie herum ausgegraben wird.
  3. Verfahren nach einem der Ansprüche 1 oder 2,
    dadurch gekennzeichnet, dass
    die Hebe- und Beförderungsschlaufen (6) auf den zwei vorletzten Litzen (2) ab den Seitenrändern des Vorspanntisches aufgesteckt werden.
  4. Verfahren nach einem der Ansprüche 1 bis 3,
    dadurch gekennzeichnet, dass
    beim Schritt des Betongießens ein Druck auf die Litzen (2), die mit den Hebe- und Beförderungsschlaufen (6) verbunden sind, vor und hinter diesen Schlaufen derart ausgeübt wird, dass sie bei ihrem Eindringen in den Beton an der Stelle festgehalten werden.
  5. Hohlraumplatte aus einem Beton, der durch längslaufende Armierungseisen oder -litzen vorgespannt ist, die zwischen den Hohlräumen, an dem unteren Teil der Platte, eingesetzt sind, wobei die Hohlraumplatte durch die Durchführung des Verfahrens gemäß einem der Ansprüche 1 bis 4 hergestellt ist, und an ihren vier Ecken mit Hebe- und Beförderungsschlaufen (6) versehen ist, die an der Oberfläche des Betons zutage liegen, wobei die Schlaufen jeweils entlang einer damit verbundenen Litze (2), an beiden Seiten dieser Litzen, durch Verdrehung aufgesteckt sind, und jeweils durch einen knieförmigen Metallstab gebildet sind, der einerseits an seinem zentralen Teil eine Mittelkröpfung (7), die einen ebenen Handhabering definiert, wobei der Handhabering und die damit verbundene Litze (2) im Wesentlichen komplanar sind, und andererseits an seinen jeweiligen Enden Seitenkröpfungen (8, 8') aufweist, die sich im Wesentlichen symmetrisch an beiden Seiten der Mittelkröpfung (7) erstrecken und an den Enden der Schlaufe (6) Positionierungslaschen (9, 9') definieren, welche eine präzise Einrichtung der Hebe- und Beförderungsschlaufe (6) auf dem Vorspanntisch, auf dem der Beton gegossen wird, ermöglichen, wobei die Positionierungslaschen unmittelbar an Befestigungsbügel (10, 10') angrenzen, welche im Wesentlichen U-förmig ausgebildet und in einer im Wesentlichen senkrecht zu der Ebene des Handhaberinges laufenden Ebene angeordnet sind.
  6. Hohlraumplatte aus Spannbeton nach Anspruch 5,
    dadurch gekennzeichnet, dass
    der Durchmesser der knieförmigen Metallstäbe, welche die Hebe- und Beförderungsschlaufen (6) bilden, kleiner als 14 mm ist, vorzugsweise zwischen 8 und 12 mm liegt.
  7. Hohlraumplatte aus Spannbeton nach Anspruch 6,
    dadurch gekennzeichnet, dass
    die knieförmigen Metallstäbe, welche die Hebe- und Beförderungsschlaufen (6) bilden, aus einem Stahl gefertigt sind, der eine Zugfestigkeit von etwa mindestens 300 MPa und vorzugsweise von mindestens 400 MPa und parallel dazu eine Duktilität, welche ausreichend ist, um die Bruchrisiken zu vermeiden.
  8. Hohlraumplatte aus Spannbeton nach Anspruch 7,
    dadurch gekennzeichnet, dass
    der Stahl, aus dem die knieförmigen Metallstäbe, welche die Hebe- und Beförderungsschlaufen (6) bilden, gefertigt sind, ein spezieller Stahl ist, der einem Kaltverformungsverfahren unterworfen wurde.
EP05300033.7A 2004-01-15 2005-01-14 Verfahren zur Herstellung von Hohlraumplatten aus Spannbeton und daraus hergestellten Hohlraumplatten Expired - Lifetime EP1555100B1 (de)

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 EP1555100A1 (de) 2005-07-20
EP1555100B1 true EP1555100B1 (de) 2018-10-31

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EP05300033.7A Expired - Lifetime EP1555100B1 (de) 2004-01-15 2005-01-14 Verfahren zur Herstellung von Hohlraumplatten aus Spannbeton und daraus hergestellten Hohlraumplatten

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EP (1) EP1555100B1 (de)
FR (1) FR2865228B1 (de)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2885548B1 (fr) * 2005-05-10 2007-06-22 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
FI121809B (fi) * 2006-07-12 2011-04-29 Elematic Oy Ab Menetelmä ja laitteisto nostolenkkien asettamiseksi betonista valettuun ontelolaattaan
FR2905397B1 (fr) * 2006-08-30 2015-01-16 Kp1 Dalle alveolee pourvue d'au moins un anneau de levage.
NO333001B1 (no) * 2007-02-08 2013-02-11 Selvaag Spinoff As Bygningselement
EP2075392B1 (de) 2007-12-24 2015-03-18 Echo Vorgefertigtes Betonelement
FR2927565B1 (fr) * 2008-02-18 2012-11-16 Kp1 Procede de fabrication d'une poutre treillis
FI123873B (fi) * 2012-03-12 2013-11-29 Elematic Oy Ab Menetelmä ja laitteisto nostolenkin asentamiseksi sekä nostolenkin muodostava osa

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DK168695B1 (da) * 1991-08-30 1994-05-24 Betonelement A S Transportbøjle til ekstruderede betonelementer
EP1245756A1 (de) * 2001-03-28 2002-10-02 Bernard Legeai Hohlraumplatte und ihr Herstellungsverfahren
FR2833285A1 (fr) * 2001-12-10 2003-06-13 Applic Composants Guiraud Frer Procede de mise en place de moyens de levage dans des dalles precontraintes alveolees

Family Cites Families (4)

* Cited by examiner, † Cited by third party
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
CA2306966A1 (en) * 2000-04-27 2001-10-27 David Janeway Apparatus and method for cast panel fabrication and post-formed fixturing
JP4541592B2 (ja) * 2001-05-24 2010-09-08 株式会社スパンクリートコーポレーション 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

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DK168695B1 (da) * 1991-08-30 1994-05-24 Betonelement A S Transportbøjle til ekstruderede betonelementer
EP1245756A1 (de) * 2001-03-28 2002-10-02 Bernard Legeai Hohlraumplatte und ihr Herstellungsverfahren
FR2833285A1 (fr) * 2001-12-10 2003-06-13 Applic Composants Guiraud Frer Procede de mise en place de moyens de levage dans des dalles precontraintes alveolees

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Publication number Publication date
FR2865228A1 (fr) 2005-07-22
FR2865228B1 (fr) 2006-03-24
EP1555100A1 (de) 2005-07-20

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