EP0814221B1 - Procédé de fabrication d'un mât en beton, dispositif pour la mise en oeuvre de ce procédé et mât obtenu par ce procédé - Google Patents

Procédé de fabrication d'un mât en beton, dispositif pour la mise en oeuvre de ce procédé et mât obtenu par ce procédé Download PDF

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Publication number
EP0814221B1
EP0814221B1 EP97109519A EP97109519A EP0814221B1 EP 0814221 B1 EP0814221 B1 EP 0814221B1 EP 97109519 A EP97109519 A EP 97109519A EP 97109519 A EP97109519 A EP 97109519A EP 0814221 B1 EP0814221 B1 EP 0814221B1
Authority
EP
European Patent Office
Prior art keywords
mould
elements
concrete
collars
cone
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
EP97109519A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0814221A1 (fr
Inventor
René Beck
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.)
Gram SA
Original Assignee
Gram SA
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 Gram SA filed Critical Gram SA
Publication of EP0814221A1 publication Critical patent/EP0814221A1/fr
Application granted granted Critical
Publication of EP0814221B1 publication Critical patent/EP0814221B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
    • E04H12/00—Towers; Masts or poles; Chimney stacks; Water-towers; Methods of erecting such structures
    • E04H12/16—Prestressed structures
    • 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
    • B28B13/00—Feeding the unshaped material to moulds or apparatus for producing shaped articles; Discharging shaped articles from such moulds or apparatus
    • B28B13/04—Discharging the shaped articles
    • B28B13/06—Removing the shaped articles from moulds
    • 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
    • B28B23/02—Arrangements specially adapted for the production of shaped articles with elements wholly or partly embedded in the moulding material; Production of reinforced objects wherein the elements are reinforcing members
    • B28B23/18—Arrangements specially adapted for the production of shaped articles with elements wholly or partly embedded in the moulding material; Production of reinforced objects wherein the elements are reinforcing members for the production of elongated articles
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
    • E04H12/00—Towers; Masts or poles; Chimney stacks; Water-towers; Methods of erecting such structures
    • E04H12/02—Structures made of specified materials
    • E04H12/12—Structures made of specified materials of concrete or other stone-like material, with or without internal or external reinforcements, e.g. with metal coverings, with permanent form elements

Definitions

  • the present invention relates to a manufacturing process of concrete masts as well as a device for the implementation of this process.
  • This invention relates to also the concrete masts directly obtained by the implementation of said method.
  • This process is particularly suitable for the manufacture of masts of considerable length which cannot be made in a single part, or masts which, due to constraints inherent in their transport or storage, must be carried out in several elements.
  • masts having at one of their ends a female cone intended to receive a male cone from one end of another mast, these cones being of dimensions specific corresponding so that during the introduction of the male cone of an element in the female cone of another element, we obtain an assembly with the less play possible.
  • the angle at the top of the cone is chosen to make a self-locking coupling.
  • This technique which requires great dimensional accuracy male and female cones of the elements cannot be used, for precast concrete elements by centrifugation, only if these cones are made beforehand in precise molds then incorporated into the structural element during its centrifugation. It is indeed impossible to obtain cones, and in particular female cones having the dimensional accuracy required by centrifugation.
  • This technique due to the precision required, is too expensive for the production of prefabricated masts concrete by centrifugation. It still has the disadvantage to require the welding of metal reinforcements from the mast to those of the cone during the installation of these last.
  • Another technique for producing concrete masts either by centrifugation or by vibration on a vibrating table consists of using metal cones respectively male and female at the ends of the mast elements. These metal cones act as a lost mold and remain integrated in the elements constituting the mast after its manufacturing and its coupling. To reduce costs production of such masts, we made these metal cones in rolled sheets with the disadvantage that these cones are not very precise. The two reported items are in contact with the joint and due to imprecision it is necessary to fill the space between the female cone and the male cone by injecting concrete or any other material curable in order to guarantee good transmission of forces bending and twisting.
  • the object of the present invention is to obviate the drawbacks mentioned above and to offer a process for manufacture of structural elements to make masts concrete both by centrifugation and by vibration which does not require a lost mold and which allows mating different elements of the precise mast, without play and therefore without injection during assembly and which is capable of effectively transmit bending and shearing forces and twist.
  • Another object of the invention relates to a device allowing the implementation of the process mentioned above and which is distinguished by the characteristics listed in claim 6.
  • the invention also relates to precast concrete masts. directly obtained by said process.
  • Figure 1 illustrates two elements 1,2 shuttered and put in place on a bench to be concreted.
  • Element 1 will be referenced as the female element and element 2 as the male element.
  • the length of each element 1,2 can be for example about twenty meters and their section be circular, oval, elliptical or polygonal. To decrease the weight of these items they are usually hollow.
  • the body of elements 1,2 is presented under the form of a prismatic or cylindrical concrete tube which can be fitted with longitudinal metal reinforcements 3 and transverse 4 closed on themselves in order to reinforce elements 1,2.
  • a metal mold 5 in one part is put in place before concreting between the two elements 1.2 of the mast. This mold 5 is in the form a truncated cone closed at one of its ends.
  • annular flanges 6,7 are arranged close to the open end of the mold 5. These flanges 6,7 are directed outward perpendicular to the axis of truncated cone revolution. At its opposite end, the mold 5 is closed by a bottom 8.
  • a second disc 9 made double bottom office. The bottom of the mold 8 and the disc 9 are spaced a distance roughly equivalent to that separating the two flanges 6,7 in the longitudinal direction. It is obvious that the double bottom of the mold can be realized in different ways such as being consisting of the bottom 8 and a plug of a suitable material like SAGEX (registered trademark) for example which would fill the space shown in the drawing between the bottom 8 and the disc 9.
  • the flanges 6,7 are provided with holes distributed at regular intervals around their edges. These holes 10 cooperate on the one hand with positioning devices angular of the two elements 1,2 of the mast and on the other hand with extraction devices to facilitate extraction of the mold after placing the concrete. We see in Figure 3, eight holes 10 distributed every 45 degrees cooperating with four positioning devices angular and four extraction devices divided into alternating around the edge of the collar 7.
  • the angular positioning device illustrated in larger scale in Figure 4, consists of a assembly socket 11 communicating with hole 10 and secured to a plate 12 bearing against the surface flanges 6,7 located towards the inside of the bodies of the elements 1,2.
  • the ends of the metal reinforcements longitudinal 3 are welded against the outer surface sockets 11.
  • the socket 11 On the side of the female element 1, the socket 11 is extended by a formwork making it possible to spare a recess 13 in the body of the element 1.
  • Figure 2 illustrates the two elements 1,2 of the mast after placing the concrete and after removing the mold 5 by means of the extraction devices of which the operation will be explained below.
  • the outer surface of the cone of the male element 2 comes into contact with the internal surface of the female cone of the element.
  • the mold 5 is dimensioned and in particular the distance between the two flanges 6,7 so that the end male cone of element 2 does not come into contact with the bottom of the female cone of element 1 while the plates 12 finishing the edge of the cones are also not no longer in touch.
  • the fact that these surfaces do not touch not, once the elements are assembled, prevents the perpendicularity of these surfaces relative to the axis of the cone has an influence on the alignment of the elements (1,2).
  • the space remaining between these two annular surfaces 12 can be filled with a hard mass which will increase the surface compressed at this level. So the assembly of the two elements is done only by entering contact of male and female conical surfaces.
  • the angle of cone is preferably minimum to facilitate extraction of mold 5, but can be chosen so that the assembly is self-locking.
  • Positioning studs 14 are housed in the sockets 11 thereby ensuring positioning perfect angularity of elements 1 and 2.
  • the mold 5 is made of rolled sheets and this fact is not very precise. This fact, instead of being a disadvantage as in the case of a two-part mold, promotes the resumption of torsional forces at which the mast is subject. Indeed, the fact that the mold section conical 5 is not perfectly round promotes absorption torsional forces, defects on one side of the mold found on the other. It should be noted that can promote this fact by giving the mold section 5 a slightly oval or elliptical shape. he is also possible to make the mold 5 by precise machining in a metal or plastic part.
  • Figure 5 illustrates the detail of the extraction devices located on the periphery of the flanges 6,7 alternately with positioning devices. They are consist of a nut 15 welded to the outer surface of the flanges 6,7. A bolt 16 is supported in the position of service against stop plates 12 located on surfaces annular of male and female cones. When the concrete was put in place and set, just screw the bolts 16 to separate the mold 5 from the cones thus obtained.
  • the bolts 16 cooperating with the nuts 15 can be replaced by hydraulic cylinders.
  • FIG. 6 illustrates the positioning devices in the case of a mast with prestressing reinforcements 17.
  • prestressing reinforcements are like illustrated in the drawing, anchored at each end of the mast and tensioned.
  • the flanges 6,7 have additional holes allowing the passage of these reinforcements 17. It is also possible to provide that these prestressing reinforcements 17 are anchored using a mechanical device, on the stop plates and tensioning at each end of the mast.
  • the process for manufacturing a concrete mast according to the The present invention comprises the following steps. It's about first of all placing the formwork on a concreting bench of at least two elements constituting the mast. It is obvious that depending on the total length of the mast more than two elements may be necessary for get the desired length.
  • a one-piece metal mold at the junction of two elements. This mold is in the form of a trunk of cone open at one of its ends and has a bottom 8 at the other end. At its open end, the mold has two parallel annular flanges 6,7 and substantially perpendicular to its axis of revolution. The mold also has a disc 9 parallel to the bottom 8 which acts as a double bottom.
  • the longitudinal distance between the bottom 8 of the disc 9 is slightly greater than the longitudinal spacing flanges 6,7.
  • the distance between the two flanges 6.7 which depends on the thickness of the mold as well as of the opening angle of the cone, is determined so that, once put one on the other, the two elements fit together perfectly and only come into contact through their conical surfaces.
  • the concrete can be placed by centrifugation.
  • an additional step is necessary before extracting the mold 5.
  • it will create a vacuum located between the outer surface of the conical mold 5 and the female cone. This void will be filled before removing the mold by injection of concrete or any other material curable by two injection holes in the body of the female element 1.
  • Prestressing reinforcement can be produced by the technique of adherent wires, these wires then being linked to concrete, or by strands at the terminals which once energized are coupled to the ends of the portions mast for example at the stop plates 12.

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Civil Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Structural Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Materials Engineering (AREA)
  • Wood Science & Technology (AREA)
  • Manufacturing Of Tubular Articles Or Embedded Moulded Articles (AREA)
  • Moulds, Cores, Or Mandrels (AREA)
  • On-Site Construction Work That Accompanies The Preparation And Application Of Concrete (AREA)
  • Devices For Post-Treatments, Processing, Supply, Discharge, And Other Processes (AREA)
EP97109519A 1996-06-21 1997-06-12 Procédé de fabrication d'un mât en beton, dispositif pour la mise en oeuvre de ce procédé et mât obtenu par ce procédé Expired - Lifetime EP0814221B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
CH01554/96A CH691234A5 (fr) 1996-06-21 1996-06-21 Procédé de fabrication d'un mât en béton, dispositif pour la mise en oeuvre de ce procédé et mât obtenu par ce procédé.
CH1554/96 1996-06-21
CH155496 1996-06-21

Publications (2)

Publication Number Publication Date
EP0814221A1 EP0814221A1 (fr) 1997-12-29
EP0814221B1 true EP0814221B1 (fr) 2002-09-18

Family

ID=4213136

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97109519A Expired - Lifetime EP0814221B1 (fr) 1996-06-21 1997-06-12 Procédé de fabrication d'un mât en beton, dispositif pour la mise en oeuvre de ce procédé et mât obtenu par ce procédé

Country Status (6)

Country Link
EP (1) EP0814221B1 (da)
AT (1) ATE224495T1 (da)
CH (1) CH691234A5 (da)
DE (1) DE69715524T2 (da)
DK (1) DK0814221T3 (da)
ES (1) ES2180856T3 (da)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2291053B1 (es) * 2003-10-07 2009-03-01 Romero Hormelec, S.A. Sistema de fabricacion y union de tramos de postes huecos de hormigon armado y/o pretensado.
DE102006030400A1 (de) * 2006-06-29 2008-01-03 Pfleiderer Europoles Gmbh & Co. Kg Freileitungsmast aus Schleuderbeton

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB386108A (en) * 1931-12-21 1933-01-12 Pfistershammer Josef Reinforced concrete pole
DE1434730A1 (de) * 1963-11-12 1970-01-15 Moll Kg Leonhard Verfahren zur Herstellung von aus mehreren loesbar miteinander verbundenen Teilen bestehenden Stahl- oder Spannbetonmasten und nach diesem Verfahren hergestellter mehrteiliger Betonmast
CH599432A5 (da) * 1976-10-05 1978-05-31 Gram Sa

Also Published As

Publication number Publication date
DK0814221T3 (da) 2003-01-27
ES2180856T3 (es) 2003-02-16
DE69715524T2 (de) 2003-05-22
ATE224495T1 (de) 2002-10-15
CH691234A5 (fr) 2001-05-31
EP0814221A1 (fr) 1997-12-29
DE69715524D1 (de) 2002-10-24

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