FR2652115A1 - Improvements to a method for constructing structures such as reservoirs, silos, towers, chimneys, and conduits of great height and components for implementing it - Google Patents

Improvements to a method for constructing structures such as reservoirs, silos, towers, chimneys, and conduits of great height and components for implementing it Download PDF

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Publication number
FR2652115A1
FR2652115A1 FR8912437A FR8912437A FR2652115A1 FR 2652115 A1 FR2652115 A1 FR 2652115A1 FR 8912437 A FR8912437 A FR 8912437A FR 8912437 A FR8912437 A FR 8912437A FR 2652115 A1 FR2652115 A1 FR 2652115A1
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edge
flap
cavity
elements
joint
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Granted
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FR8912437A
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French (fr)
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FR2652115B1 (en
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Pierrel Guy
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Classifications

    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04HBUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
    • E04H7/00Construction or assembling of bulk storage containers employing civil engineering techniques in situ or off the site
    • E04H7/02Containers for fluids or gases; Supports therefor
    • E04H7/18Containers for fluids or gases; Supports therefor mainly of concrete, e.g. reinforced concrete, or other stone-like material
    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04HBUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
    • E04H7/00Construction or assembling of bulk storage containers employing civil engineering techniques in situ or off the site
    • E04H7/22Containers for fluent solids, e.g. silos, bunkers; Supports therefor
    • E04H7/24Constructions, with or without perforated walls, depending on the use of specified materials
    • E04H7/26Constructions, with or without perforated walls, depending on the use of specified materials mainly of concrete, e.g. reinforced concrete or other stone-like materials

Abstract

The first subject of the invention is a method for employing a prefabricated element intended for the construction of concrete walls by juxtaposition and/or superposition of similar elements, the said element being according to that described in a patent FR-2,589,509, characterised in that, opposite the opening (16) of a horizontal joint, a boarding flap (22) is fastened along the lower edge (19) of the opening, along the entire length of the latter, and in that concrete or a similar material is poured over the upper rim (2) of the flap. Its second subject is an element permitting implementation of the abovementioned method, characterised in that the said edge to which the flap is fastened consists of the rim (19) of an overlay (18) devoid of wedging studs.

Description

La présente invention a pour objet un élément préfabriqué destiné à la construction de parois en béton, par exemple parois d'ouvrages tels que tunels, silos et reservoirs, par juxtaposition et/ou superposition d'éléments semblables. The present invention relates to a prefabricated element intended for the construction of concrete walls, for example walls of structures such as tunnels, silos and tanks, by juxtaposition and / or superposition of similar elements.

Un brevet FR-2.589.509, dit principal, du même demandeur a pour objet un élément de construction de forme curviligne ou parallèlipipédique aplatie destiné à être juxtaposé et/ou superposé bord à bord avec un élément semblable, les bords dudit élément comportant des parties extérieures en saillies par rapport à une partie centrale en retrait pour le joint vertical, quant au joint horizontal, il comporte pour l'élément inférieur, côté intérieur ou extérieur, une arête latérale en saillie sur laquelle vient reposer le plot de réglage et de stabilité de l'élément supérieur qui comporte un becquet suivi d'une partie biaise où sont implantés les dits plots, le tout assemblé, définissant des lumières par lesquelles est introduite la matière de remplissage.Les chants des éléments peuvent comporter des armatures en saillies qui se recouvrent et assurent ainsi-la continuité mécanique des composants entre eux. A patent FR-2,589,509, said main, of the same applicant relates to a construction element of curvilinear or flattened parallelepiped shape intended to be juxtaposed and / or superimposed edge to edge with a similar element, the edges of said element comprising parts external projecting from a recessed central part for the vertical joint, as for the horizontal joint, it comprises for the lower element, internal or external side, a lateral projecting edge on which rests the adjustment and stability stud of the upper element which includes a spoiler followed by a bias portion where the said studs are located, all assembled, defining lights through which the filling material is introduced. The edges of the elements may include projecting frames which are cover and thus ensure the mechanical continuity of the components between them.

Le brevet précité a également pour objet le procédé de construction de réservoirs, tours, silos, conduits de grande section, murs, mettant en oeuvre un élément de construction conforme à la description précédente et il consiste à superposer et/ou à juxtaposer des éléments préfabriqués ; suivant ce procédé - il est mis en place des armatures horizontales de répartition contre les armatures verticales faisant saillie dans le vide horizontal - il est coulé dans l'orifice la matière d'étanchéité en la pervibrant - la partie haute du joint horizontal est terminée par projection de matière puis arasée au nu du composant - il est coulé la matière d'étanchéité dans les vides ver ticaux. The aforementioned patent also relates to the process for the construction of tanks, towers, silos, conduits of large section, walls, using a construction element in accordance with the preceding description and it consists of superimposing and / or juxtaposing prefabricated elements. ; according to this process - horizontal reinforcement is placed against the vertical reinforcement projecting into the horizontal void - the sealing material is poured into the orifice by pervibrating it - the upper part of the horizontal joint is terminated by projection of material then leveled off to the bare component - the sealing material is poured into the vertical voids.

La présente invention a pour objet des perfectionnements apportés aux éléments et au procédé, visant à simplifier d'une part la fabrication des éléments, et d'autre part leur mise en oeuvre. The present invention relates to improvements made to the elements and to the method, aiming to simplify on the one hand the manufacture of the elements, and on the other hand their implementation.

Selon la présente invention un procédé de mise en ouvre d'un élément préfabriqué destiné à la construction de parois en béton par juxtaposition et/ ou superposition d'éléments semblables, ledit élément étant de forme générale parallélépipèdique aplatie, et pouvant être légèrement courbé, ledit élément ayant des chants conformés de manière telle que, lorsque deux éléments sont juxtaposés ou superposés, une cavité ou vide est formée sur sensiblement la longueur du chant, ledit vide étant destiné à être rempli d'un joint de béton, les chants (horizontaux) en regard de deux éléments superposés étant conformés de manière telle que le vide formé entre eux débouche sur l'une des faces à paroi à travers une lumière, ou ouverture, la dite lumière pouvant être interrompue de loin en loin par des plots de calage, est principalement caractérisé en ce qu'en regard de l'ouverture d'un joint horizontal, une bavette coffrante est fixée le long du bord inférieur de l'ouverture tout au long de ce dernier, et en ce que du béton, ou autre matière analogue est coulée par dessus le rebord supérieur de la bavette. According to the present invention a method of implementing a prefabricated element intended for the construction of concrete walls by juxtaposition and / or superposition of similar elements, said element being of generally flattened parallelepiped shape, and being able to be slightly curved, said element having edges shaped so that when two elements are juxtaposed or superimposed, a cavity or void is formed over substantially the length of the edge, said void being intended to be filled with a concrete joint, the edges (horizontal) opposite two superimposed elements being shaped in such a way that the vacuum formed between them opens onto one of the wall faces through a light or opening, said light being able to be interrupted from time to time by wedging pads, is mainly characterized in that opposite the opening of a horizontal joint, a formwork flap is fixed along the lower edge of the opening throughout the latter, and in that concrete or other similar material is poured over the upper edge of the flap.

De préférence ledit bord auquel est fixé la bavette est constitué par le rebord d'un becquet dépourvu de plots de calage. Preferably said edge to which the flap is fixed consists of the edge of a spoiler devoid of wedging studs.

De préférence le dit bord auquel est fixé la bavette est l'arête du bord supérieur de 1' élément inférieur. Preferably said edge to which the flap is fixed is the edge of the upper edge of one lower element.

De préférence une armature métallique est constituée par des fers recourbés en épingle, leur partie courbe faisant saillie dans ladite cavité. Preferably a metal frame is constituted by curved hairpins, their curved part projecting into said cavity.

De préférence les parties courbes des armatures de chaque élément voisin, sont disposées en alternance dans la cavité. Preferably the curved parts of the frames of each neighboring element are arranged alternately in the cavity.

De préférence, pour un joint horizontal, les parties courbes de l'armature de l'élément supérieur reposent sur une cale reposant elle-même sur le fond de la cavité. Preferably, for a horizontal joint, the curved parts of the frame of the upper element rest on a wedge itself resting on the bottom of the cavity.

La présente invention sera mieux comprise,- et des détails en relevant apparaîtront, à la description qui va être faite de formes particulières de réalisation, en relation avec les figures des planches annexées dans lesquelles
- La fig.l est une perspective coupée, illustrant un assemblage d'éléments conformes à 1' invention ;;
- Les fig.2 (a,b) sont des coupes par un plan horizontal de joints verticaux pouvant coopérer avantageusement avec le joint de la figure précédente
- La fig.3 est une deuxième forme de réalisation d'un joint vertical
- La fig.4 illustre en coupe schématique un second mode d'assemblage d'éléments conformes à l'invention
- La fig.5 illustre en coupe schématique par un plan horizontal un joint vertical entre deux éléments relevant de l'invention, et
- La fig.6 illustre en coupe schématique par un plan vertical un joint horizontal entre deux éléments relevant de l'invention.
The present invention will be better understood, and details will become apparent from the description which will be made of particular embodiments, in relation to the figures of the appended plates in which
- Fig.l is a cut perspective, illustrating an assembly of elements according to one invention ;;
- Fig.2 (a, b) are sections through a horizontal plane of vertical joints which can cooperate advantageously with the joint of the previous figure
- Fig.3 is a second embodiment of a vertical joint
- Fig.4 illustrates in schematic section a second method of assembling elements according to the invention
- Fig.5 illustrates in schematic section through a horizontal plane a vertical joint between two elements of the invention, and
- Fig.6 illustrates in schematic section through a vertical plane a horizontal joint between two elements of the invention.

Selon un premier perfectionnement, la fig.I- représente une coupe verticale du joint horizontal, et en vue de couler gavitairement la deuxième partie du joint horizontal au lieu de projeter la matière de remplissage, il est fixé, par des clous 23 par exemple, une bavette coffrante 22 en regard de l'ouverture 16 le long de son bord inférieur 19. According to a first improvement, the fig.I- represents a vertical section of the horizontal joint, and with a view to gavitically pouring the second part of the horizontal joint instead of projecting the filling material, it is fixed, by nails 23 for example, a shuttering flap 22 opposite the opening 16 along its lower edge 19.

Selon un autre perfectionnement, la fig.2a représente une coupe horizontale sur un joint vertical ; les éléments adjacents 33,34 comportent des becquets d'inégale longueur, de telle sorte qu'il subsiste au montage une lumière 30 donnant sur l'extérieur ou sur l'intérieur de l'ouvrage, laquelle lumière est obturée soit par une plaque 35 d'un matériau du genre PVC collée à froid, soit par un coffrage mobile, avant coulage de la matière de remplissage ; l'élément comportant le becquet moitié moins long que le becquet de l'autre, pourrait aussi n'en pas comporter. According to another improvement, fig.2a represents a horizontal section on a vertical joint; the adjacent elements 33, 34 have spoilers of unequal length, so that there remains in the mounting a light 30 giving on the outside or on the inside of the structure, which light is closed either by a plate 35 a PVC-like material bonded cold, either by a movable formwork, before pouring the filling material; the element comprising the spoiler half as long as the spoiler of the other, could also not include it.

Les perfectionnements de la fig. 2b sont analogues à ceux de la fig.2, à ceci près que l'un des becquets dE de longueur nulle et que les éléments adjacents sont courbes ; la plaque 35' refermant la lumière 36' peut être plane ou courbe ; l'armature est du type de celle qui sera décrite avec la fig.4. The improvements of fig. 2b are similar to those of FIG. 2, except that one of the spoilers dE of zero length and that the adjacent elements are curved; the plate 35 'closing the light 36' can be flat or curved; the frame is of the type which will be described in fig. 4.

Selon un autre perfectionnement, la fig;3 représente une coupe horizontale sur un joint vertical ; en vue de bien stabiliser celui-ci lors du montage, il est prévu des feuillures 30 dans chaque élément adjacent. According to another improvement, FIG; 3 represents a horizontal section on a vertical joint; in order to properly stabilize it during assembly, rebates 30 are provided in each adjacent element.

Selon un autre perfectionnement, la fig.4 représente une coupe verticale sur un joint horizontale ; seul l'élément supérieur 25 comporte un becquet 27 ; le joint entre les éléments 23, inféreiur, et 25 est assuré par le moyen des armatures 24, à savoir que l'armature de l'élément supérieur est posé sur une cale 36 reposant elle-même sur l'élément inférieur, de manière à maintenir une certaine distance entre l'élément inférieur et l'extrémité basse de l'élément supérieur, pour laisser la place à un joint 28 par exemple. Le joint est coffré d'un coté par une bavette coffrante 22, comme dans l'exemple de la fig.l. Les armatures sont constituées par des fers 24 recourbés en épingle, les parties courbées faisant saillie dans la cavité 8. According to another improvement, fig.4 represents a vertical section on a horizontal joint; only the upper element 25 has a spoiler 27; the joint between the elements 23, inféreiur, and 25 is ensured by means of the armatures 24, namely that the armature of the upper element is placed on a wedge 36 resting itself on the lower element, so as to maintain a certain distance between the lower element and the lower end of the upper element, to make room for a seal 28 for example. The seal is enclosed on one side by a shuttering flap 22, as in the example in fig.l. The reinforcements consist of irons 24 bent into a pin, the curved parts protruding into the cavity 8.

Selon un autre perfectionnement, la fig.5 représente une coupe horizontale d'un joint ver tical ; les éléments adjacents comportent des becquets 40,41 de longueurs égales ou non, du même coté, intérieur ou extérieur, de l'ouvrage, un seul des composants pouvant ne comporter qu'un seul becquet (f ig.7) la matière du joint est coulée depuis l'extrémité supérieure ouverte ; une banche 43 referme le coffrage le long de la face verticale des éléments. According to another improvement, fig.5 represents a horizontal section of a vertical joint; the adjacent elements have 40.41 spoilers of equal or different lengths, on the same side, inside or outside, of the structure, only one of the components may have only one spoiler (f ig.7) the material of the joint is poured from the open upper end; a panel 43 closes the formwork along the vertical face of the elements.

Selon un autre perfectionnement, la fig.1 représente une coupe verticale sur un joint horizontal ; les éléments en superposition comportent chacun un becquet 31,32 et sont avantageusement séparés par un joint de mousse 35 ; la partie opposée au becquets est coffrée par une bavette amovible 30 assujéttie au parement de l'élément inférieur, et la matière d'étanchéité est coulée entre la parie haute de la bavette et le parement de l'élément supérieur.  According to another improvement, fig.1 represents a vertical section on a horizontal joint; the superimposed elements each comprise a spoiler 31, 32 and are advantageously separated by a foam seal 35; the part opposite the spoilers is shuttered by a removable flap 30 subject to the facing of the lower element, and the sealing material is poured between the upper wall of the flap and the facing of the upper element.

Claims (1)

REVENDICATIONS 1.- Procédé de mise en oeuvre d'un élément préfabriqué des1.- Method of implementing a prefabricated element tiné à la construction de parois en béton par juxta for the construction of concrete walls by juxta position et/ou superposition d'éléments semblables, position and / or superimposition of similar elements, ledit élément étant de forme générale parallélépipè said element being of generally parallelepiped shape dique aplatie, et pouvant être légèrement courbée, dique flattened, and can be slightly curved, ledit élément ayant des chants conformés de manière said element having edges so shaped telle que, lorsque deux éléments sont juxtaposés ou such that when two elements are juxtaposed or superposés, une cavité ou vide est formée sur sensi superimposed, a cavity or void is formed on sensi bleent la longueur du chant, ledit vide étant destiné bleent the length of the edge, said void being intended à être rempli d'un joint de béton, les chants (horizon to be filled with a concrete joint, the edges (horizon taux) en regard de deux éléments superposés étant con rate) next to two superimposed elements being con formés de manière telle que le vide formé entre eux formed in such a way that the void formed between them débouche sur l'une des faces à paroi à travers une opens onto one of the wall faces through a lumière, ou ouverture, la dite lumière pouvant être light, or aperture, said light being able to be interrompue de loin en loin par des plots de calage, interrupted from time to time by wedging pads, le dit élément étant conforme à la revendication 1 du said element being in accordance with claim 1 of brevet FR-2.589.509, caractérisé: patent FR-2.589.509, characterized: en ce qu'en regard de l'ouverture in that next to the opening (16) d'un joint horizontal, une bavette coffrante (22) (16) with a horizontal joint, a shuttering flap (22) est fixée le long du bord inférieur (19) de l'ouverture is fixed along the lower edge (19) of the opening tout au long de ce dernier (fig.l), et throughout the latter (fig.l), and en ce que du béton, ou autre in that concrete, or whatever matière analogue, est coulé par dessus le rebord supé similar material is poured over the upper rim rieur (2) de la bavette 2.- Elément permettant la mise en oeuvre d'un procédé con laughter (2) of the flap 2.- Element allowing the implementation of a process con forme à la revendication 1, caractérisé form in claim 1, characterized en ce que ledit bord auquel est in that said edge to which is fixé la bavette est constitué par le rebord (19) d'un fixed the flap is formed by the flange (19) of a becquet (18) dépourvu de plots de calage (fig.l) 3.- Elément selon la revendication 1, caractérisé  spoiler (18) devoid of wedging studs (fig.l) 3.- Element according to claim 1, characterized en ce que le dit bord auquel est in that the said edge which is fixé la bavette est l'arête (20) du bord supérieur de attached the flap is the edge (20) of the upper edge of l'élément inférieur (23)(fig.4) 4.- Elément selon la revendication l, caractérisé the lower element (23) (fig.4) 4.- Element according to claim l, characterized en ce qu'une armature métallique in that a metal frame est constituée par des fers (24) recourbés en épingle, consists of irons (24) bent into a hairpin, leur partie courbe faisant saillie dans ladite cavité their curved part projecting into said cavity (8) ; 5.- Elément selon la revendication 4, caractérisé (8); 5.- element according to claim 4, characterized en ce que les parties courbes in that the curved parts (24) des armatures de chaque élément voisin, sont dis (24) reinforcements of each neighboring element, are dis posées en alternance dans la cavité (8) 6.- Elément selon la revendication 4, caractérisé : alternately placed in the cavity (8) 6.- Element according to claim 4, characterized: en ce que, pour un joint horizon in that for a horizon joint tal les parties courbes (24) des fers de l'armature tal the curved parts (24) of the irons of the frame de l'élément supérieur reposent sur une cale (36) repo of the upper element rest on a wedge (36) repo sant le fond de la cavité (8).  the bottom of the cavity (8).
FR8912437A 1989-09-18 1989-09-18 IMPROVEMENTS IN A PROCESS FOR CONSTRUCTING STRUCTURES, SUCH AS TANKS, SILOS, TOWERS, CHIMNEYS, HIGH CONDUITS AND COMPONENTS FOR ITS IMPLEMENTATION. Expired - Lifetime FR2652115B1 (en)

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Application Number Priority Date Filing Date Title
FR8912437A FR2652115B1 (en) 1989-09-18 1989-09-18 IMPROVEMENTS IN A PROCESS FOR CONSTRUCTING STRUCTURES, SUCH AS TANKS, SILOS, TOWERS, CHIMNEYS, HIGH CONDUITS AND COMPONENTS FOR ITS IMPLEMENTATION.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8912437A FR2652115B1 (en) 1989-09-18 1989-09-18 IMPROVEMENTS IN A PROCESS FOR CONSTRUCTING STRUCTURES, SUCH AS TANKS, SILOS, TOWERS, CHIMNEYS, HIGH CONDUITS AND COMPONENTS FOR ITS IMPLEMENTATION.
FR8916114 1989-12-06

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FR2652115A1 true FR2652115A1 (en) 1991-03-22
FR2652115B1 FR2652115B1 (en) 1991-11-29

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2682141A1 (en) * 1991-10-04 1993-04-09 Sogea Method for producing a construction joint between two prefabricated elements of a piece of construction work, a construction joint relating thereto, and piece of construction work including such a joint
FR2684710A1 (en) * 1991-12-09 1993-06-11 Pierrel Guy Method for building constructions, such as bridge, frame, tunnel, large duct, reservoir, by assembling prefabricated elements
FR2688252A1 (en) * 1992-03-04 1993-09-10 Sogea Method for improving the strength of a tubular reinforced-concrete construction, tubular construction which can be obtained by this method and prefabricated element relating thereto
FR2728925A1 (en) * 1995-01-02 1996-07-05 Attilio Jean Pierre Construction block for swimming pool, esp. pool wall
ES2326010A1 (en) * 2006-08-16 2009-09-28 Inneo21, S.L. Assembly structure and procedure for concrete towers used in wind turbines
ES2394450A1 (en) * 2010-03-10 2013-01-31 Inneo Torres, S.L. Wet board structure. (Machine-translation by Google Translate, not legally binding)
EP3303734A4 (en) * 2015-05-29 2019-03-06 Tindall Corporation Method and apparatus for constructing a concrete tower

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH240742A (en) * 1944-01-11 1946-01-31 Const Sa Et Process for constructing a reinforced concrete tank intended to contain liquids and tank obtained by this process.
CH409353A (en) * 1961-07-29 1966-03-15 Maus Robert Container made from a set of precast reinforced concrete elements
FR2282523A1 (en) * 1974-08-19 1976-03-19 Rouchaud Roland Modular structure for low or medium rise buildings - has reinforced concrete beams and walls joined to form modules
FR2373650A1 (en) * 1976-12-07 1978-07-07 Eugene Pierre Smits PROCESS FOR THE REALIZATION OF FIRE-RESISTANT CONCRETE ELEMENTS, ELEMENTS AND CONSTRUCTIONS APPLYING THESE ELEMENTS
GB2183269A (en) * 1985-10-31 1987-06-03 Guy Pierrel Construction of tall tanks, silos, towers, chimneys etc.

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH240742A (en) * 1944-01-11 1946-01-31 Const Sa Et Process for constructing a reinforced concrete tank intended to contain liquids and tank obtained by this process.
CH409353A (en) * 1961-07-29 1966-03-15 Maus Robert Container made from a set of precast reinforced concrete elements
FR2282523A1 (en) * 1974-08-19 1976-03-19 Rouchaud Roland Modular structure for low or medium rise buildings - has reinforced concrete beams and walls joined to form modules
FR2373650A1 (en) * 1976-12-07 1978-07-07 Eugene Pierre Smits PROCESS FOR THE REALIZATION OF FIRE-RESISTANT CONCRETE ELEMENTS, ELEMENTS AND CONSTRUCTIONS APPLYING THESE ELEMENTS
GB2183269A (en) * 1985-10-31 1987-06-03 Guy Pierrel Construction of tall tanks, silos, towers, chimneys etc.

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2682141A1 (en) * 1991-10-04 1993-04-09 Sogea Method for producing a construction joint between two prefabricated elements of a piece of construction work, a construction joint relating thereto, and piece of construction work including such a joint
FR2684710A1 (en) * 1991-12-09 1993-06-11 Pierrel Guy Method for building constructions, such as bridge, frame, tunnel, large duct, reservoir, by assembling prefabricated elements
FR2688252A1 (en) * 1992-03-04 1993-09-10 Sogea Method for improving the strength of a tubular reinforced-concrete construction, tubular construction which can be obtained by this method and prefabricated element relating thereto
FR2728925A1 (en) * 1995-01-02 1996-07-05 Attilio Jean Pierre Construction block for swimming pool, esp. pool wall
ES2326010A1 (en) * 2006-08-16 2009-09-28 Inneo21, S.L. Assembly structure and procedure for concrete towers used in wind turbines
US7765766B2 (en) 2006-08-16 2010-08-03 Inneo21, S.L. Assembly structure and procedure for concrete towers used in wind turbines
US8381487B2 (en) 2006-08-16 2013-02-26 Inneo21, S.L. Assembly structure and procedure for concrete towers used in wind turbines
ES2394450A1 (en) * 2010-03-10 2013-01-31 Inneo Torres, S.L. Wet board structure. (Machine-translation by Google Translate, not legally binding)
EP3303734A4 (en) * 2015-05-29 2019-03-06 Tindall Corporation Method and apparatus for constructing a concrete tower

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