EP1147264B1 - Cut-off device for concrete structures - Google Patents

Cut-off device for concrete structures Download PDF

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Publication number
EP1147264B1
EP1147264B1 EP99959474A EP99959474A EP1147264B1 EP 1147264 B1 EP1147264 B1 EP 1147264B1 EP 99959474 A EP99959474 A EP 99959474A EP 99959474 A EP99959474 A EP 99959474A EP 1147264 B1 EP1147264 B1 EP 1147264B1
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Prior art keywords
cut
concrete
concrete part
part according
flask
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EP99959474A
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German (de)
French (fr)
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EP1147264A1 (en
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Dominique Fonfrede
Edmond Compassi
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    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D9/00—Removing sheet piles bulkheads, piles, mould-pipes or other moulds or parts thereof
    • E02D9/005—Removing sheet piles bulkheads, piles, mould-pipes or other moulds or parts thereof removing the top of placed piles of sheet piles

Definitions

  • the invention relates to a device for coppicing or demolishing a part made of concrete, comprising means for placing at least one element of coppicing equipped with an elementary tank intended to receive a reactive agent of chemical or mechanical nature to cause cracking by expansion effect of the concrete part.
  • a coppicing device has already been proposed using reservation means set up before the concrete pouring operation, to create a series of channels in the mass of hardened concrete.
  • the reactive agent is then introduced into the channels communicating with the different tanks.
  • the implementation of such a method of reservation makes use of a removable cage having a plurality of rigid bars vertical.
  • the reaction of the blowing agent causes a burst of the mass of concrete, which requires disassembly of the exploded concrete blocks.
  • the object of the invention is to provide a coppicing or demolition device for simple construction, allowing precise definition of the rupture zone of the part of a concrete structure to be demolished, without affecting the mechanical strength of the rest of the work.
  • the device according to the invention is characterized in that the reservoir of each element of coppicing is formed by a bottle, made in particular of plastic material, having a closed bottom, and a lateral envelope making an acute angle with the bottom, said angle between 25 ° and 60 ° to generate expansion forces intended to cause a fracture of the concrete part along the rupture zone defined by the bottom, and a small amplitude lifting movement of the block concrete after coppicing.
  • the top of the envelope is attached to a support for setting up the bottom at the desired demolition level.
  • the support member comprises a tube rigid connected to a tubular connection end formed at the top of the envelope, said tube serving as the demolition agent's supply channel inside from the bottle.
  • each cutting element can be carried out individually, or grouped using a positioning frame, before or after concrete pouring operation.
  • the positioning frame is fixed before the concrete casting operation, to reinforcements pending by means of spacers angularly spaced between the different tubes of the coppicing elements.
  • the spacers advantageously extend in the radial direction towards the inside of the frame positioning to delimit an orifice for the axial passage of the pouring pipe of the concrete.
  • each coppicing element is generally arranged horizontally extending perpendicular to the driving direction. It results in a horizontal fracture of the concrete along a plane passing through all the bottoms coplanar of the vials. Then just lift the block cut at the base, and the operation is finished.
  • each bottle can be filled with an agent delayed reagent, and is then put in place before or after pouring the concrete, without make use of filling tubes.
  • a cutting element 10 for a demolition device concrete structures includes a bottle 12, preferably made of plastic, intended to be connected to a support member 14 constituted by a vertical tube 16.
  • the bottle 12 is shaped according to a hollow bottom pocket 18 closed substantially flat, connected to a frustoconical side casing 20. It is clear that any other form of revolution can be used to make the envelope 20.
  • the bottom 18 can also be curved to compensate for the pressure generated by concrete during casting.
  • the envelope 20 forms an acute angle with the bottom 18, said angle at the base being preferably between 25 ° and 60 °.
  • a tubular end piece 22 is arranged at top of the casing 20 to receive the lower end of the tube 16. The fixing from tube 16 to envelope 20 is effected by screwing or by any means assembly.
  • the copping element 10 is introduced vertically in fresh concrete 24 after the concrete pouring operation.
  • the length the tube 16 is chosen to allow the upper end to protrude, which serves as an access orifice 26 for the installation of a destruction agent, for example example of the chemical or mechanical expansive type.
  • the depth of penetration of the cutting element 10 into the concrete 24 precisely determines the rupture zone 28.
  • the resulting reaction forces F are distributed perpendicularly along the wall of the frustoconical envelope 20, and generate radial components F1 extending parallel to the bottom 18, and vertical components F2 perpendicular to the bottom 18. This results in a fracture horizontal of the concrete in the plane passing through the flat bottom 18 of the bottle 12 which determines the coppicing area 28.
  • the action of the vertical components F2 causes a slight lifting movement of the concrete block during cutting.
  • the introduction of the coppers 10 in the fresh concrete is facilitated by a guide element 30 fixed to the outer face of the flat bottom 18.
  • the guide element 30 is formed by a cone, made for example of concrete, of which the point is directed downwards, and the base is in contact with the bottom 18.
  • a plurality of elements of coppicing 10 are placed in fresh concrete.
  • the introduction of these elements can be done individually or grouped on a positioning frame 32 common.
  • the insertion by means of a positioning frame allows a simultaneous and rapid penetration of all the bottles 12 into the fresh concrete.
  • the demolition agent is then introduced into the bottles 12 through the openings 26 of the different tubes 16. After the expansion reaction of the demolition agent, the fracture horizontal concrete allows coppicing by a simple vertical lifting of the block fractured concrete.
  • the positioning frame 32 equipped with different grading elements 10 is put in place before pouring the concrete 24.
  • the positioning frame 32 is fixed beforehand to the frames 34 awaiting pile by spacers 36 angularly spaced between the tubes 16, and resting on a hoop 39 secured to the frames.
  • the reinforcements 34 are formed by steel concrete irons coaxially surrounding the tubes 16 and the spacers 36 extend radially inwards from the frame of positioning 32 to define the internal orifice 38 for passage of the pouring pipe (not shown) concrete. All the bottoms 18 of the bottles 12 are arranged substantially in the same horizontal plane.
  • the tubes 16 for supplying the expanding agent remain integrated in the concrete block recovered after coppicing.
  • the flat bottom 18 of the bottles 12 makes it possible to obtain a horizontal fracture of the block of concrete along the coppicing zone 28. It is clear that a diagonal fracture can be obtained by means of bottles having bottoms inclined at an angle predetermined corresponding to the fracture plane.
  • the bottles 12 are not extended by tubes 16, but are filled directly with a delayed expanding agent chemical or mechanical.
  • each bottle 112 has for this purpose a bottom 118 consisting of a removable cover, which is closed after filling with the expansive agent delayed.
  • the end piece 122 is closed, and the conical shape or frustoconical of the envelope 120 is similar to that of FIG. 1.
  • the bottles 112 filled with the delayed expansive agent are either put in place before the pouring concrete by means of a support frame, or introduced into fresh concrete after casting via a recoverable rod.
  • the expansion delay effect may have a specific duration, preferably more than 2 days, depending on the size of the structure, the nature of the concrete and of room temperature.
  • the plastic material of the vials 12, 112 can be replaced by any other material breakable or deformable equivalent, for example glass.
  • a device 200 for fixing a tube 16 to a fitting template 202 comprises a collet 203 associated with a support profile 204 in which a tube 16 is threaded.
  • the profile 204 has two elastic branches intended to approach or move away depending on the closed or open position of the clamp 203.
  • the laying template 202 equipped with a plurality of tubes 16 and bottles 12, is placed on the hoop 39.
  • the clamp 203 is actuated towards the loosened position, and each tube 16 is lowered individually towards the bottom. In limit switch, the clamp 203 is closed to block the tube 36.
  • the fastening device 300 of the tube 16 is formed by a clip part 302 of substantially circular section, and deformation elastically.

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  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Mining & Mineral Resources (AREA)
  • Paleontology (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Working Measures On Existing Buildindgs (AREA)
  • On-Site Construction Work That Accompanies The Preparation And Application Of Concrete (AREA)
  • Shovels (AREA)
  • Sewage (AREA)
  • Disintegrating Or Milling (AREA)
  • Placing Or Removing Of Piles Or Sheet Piles, Or Accessories Thereof (AREA)
  • Crystals, And After-Treatments Of Crystals (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Turning (AREA)
  • Artificial Fish Reefs (AREA)
  • Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
  • Processing Of Stones Or Stones Resemblance Materials (AREA)
  • Revetment (AREA)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)

Abstract

A cut-off element for concrete structures is formed by a plastic material flask having a flat-closed base and a tapering side envelope forming an acute angle with the base, said angle being between 25° and 60° for generating expansion forces so as to provoke a fracture of the concrete part along the cut-off zone defined by the base, and a lifting movement with slight amplitude of the concrete block after cut-off.

Description

Domaine technique de l'inventionTechnical field of the invention

L'invention est relative à un dispositif de recépage ou de démolition d'une pièce en béton, comprenant des moyens de mise en place d'au moins un élément de recépage équipé d'un réservoir élémentaire destiné à recevoir un agent réactif de nature chimique ou mécanique pour provoquer la fissuration par effet d'expansion de la pièce en béton.The invention relates to a device for coppicing or demolishing a part made of concrete, comprising means for placing at least one element of coppicing equipped with an elementary tank intended to receive a reactive agent of chemical or mechanical nature to cause cracking by expansion effect of the concrete part.

Etat de la techniqueState of the art

II a déjà été proposé un dispositif de recépage utilisant des moyens de réservation mis en place avant l'opération de coulée du béton, pour créer une série de canaux dans la masse de béton durcie. L'agent réactif est ensuite introduit dans les canaux communiquant avec les différents réservoirs. La mise en oeuvre d'un tel procédé de réservation fait usage d'une cage amovible ayant une pluralité de barres rigides verticales. La réaction de l'agent d'expansion provoque un éclatement de la masse de béton, qui nécessite un démontage des blocs de béton éclatés. A coppicing device has already been proposed using reservation means set up before the concrete pouring operation, to create a series of channels in the mass of hardened concrete. The reactive agent is then introduced into the channels communicating with the different tanks. The implementation of such a method of reservation makes use of a removable cage having a plurality of rigid bars vertical. The reaction of the blowing agent causes a burst of the mass of concrete, which requires disassembly of the exploded concrete blocks.

Objet de l'inventionSubject of the invention

L'objet de l'invention consiste à réaliser un dispositif de recépage ou de démolition de construction simple, et permettant de définir avec précision la zone de rupture de la partie d'un ouvrage en béton à démolir, sans affecter la tenue mécanique du reste de l'ouvrage.The object of the invention is to provide a coppicing or demolition device for simple construction, allowing precise definition of the rupture zone of the part of a concrete structure to be demolished, without affecting the mechanical strength of the rest of the work.

Le dispositif selon l'invention est caractérisé en ce que le réservoir de chaque élément de recépage est formé par un flacon, réalisé notamment en matière plastique, ayant un fond fermé, et une enveloppe latérale faisant un angle aigu avec le fond, ledit angle étant compris entre 25° et 60° pour engendrer des forces d'expansion destinées à provoquer une fracture de la pièce de béton le long de la zone de rupture définie par le fond, et un mouvement de soulèvement de faible amplitude du bloc de béton après le recépage. Le sommet de l'enveloppe est fixé à un organe de support pour la mise en place du fond au niveau de la démolition souhaitée.The device according to the invention is characterized in that the reservoir of each element of coppicing is formed by a bottle, made in particular of plastic material, having a closed bottom, and a lateral envelope making an acute angle with the bottom, said angle between 25 ° and 60 ° to generate expansion forces intended to cause a fracture of the concrete part along the rupture zone defined by the bottom, and a small amplitude lifting movement of the block concrete after coppicing. The top of the envelope is attached to a support for setting up the bottom at the desired demolition level.

Selon un mode de réalisation préférentiel, l'organe de support comporte un tube rigide raccordé à un embout tubulaire de connexion ménagé au sommet de l'enveloppe, ledit tube servant de canal d'amenée de l'agent de démolition à l'intérieur du flacon.According to a preferred embodiment, the support member comprises a tube rigid connected to a tubular connection end formed at the top of the envelope, said tube serving as the demolition agent's supply channel inside from the bottle.

La mise en place de chaque élément de recépage peut être opérée individuellement, ou groupés au moyen d'un cadre de positionnement, avant ou après l'opération de coulée du béton.The placement of each cutting element can be carried out individually, or grouped using a positioning frame, before or after concrete pouring operation.

Selon une caractéristique de l'invention, le cadre de positionnement est fixé avant l'opération de coulée du béton, à des armatures en attente au moyen d'entretoises angulairement espacées entre les différents tubes des éléments de recépages. Les entretoises s'étendent avantageusement dans le sens radial vers l'intérieur du cadre de positionnement pour délimiter un orifice de passage axial du tuyau de coulée du béton. According to a characteristic of the invention, the positioning frame is fixed before the concrete casting operation, to reinforcements pending by means of spacers angularly spaced between the different tubes of the coppicing elements. The spacers advantageously extend in the radial direction towards the inside of the frame positioning to delimit an orifice for the axial passage of the pouring pipe of the concrete.

Le fond plat du flacon de chaque élément de recépage est généralement disposé horizontalement en s'étendant perpendiculairement à la direction d'enfoncement. Il en résulte une fracture horizontale du béton le long d'un plan passant par tous les fonds coplanaires des flacons. Il suffit ensuite de lever le bloc sectionné à la base, et l'opération est terminée.The flat bottom of the bottle of each coppicing element is generally arranged horizontally extending perpendicular to the driving direction. It results in a horizontal fracture of the concrete along a plane passing through all the bottoms coplanar of the vials. Then just lift the block cut at the base, and the operation is finished.

Il est également possible d'obtenir une fracture en diagonale en utilisant des flacons à fonds obliques, disposés sur le cadre de positionnement dans un plan incliné.It is also possible to obtain a diagonal fracture using vials with oblique bottoms, arranged on the positioning frame in an inclined plane.

Selon un développement de l'invention, chaque flacon peut être rempli avec un agent réactif retardé, et est ensuite mis en place avant ou après la coulée du béton, sans faire usage de tubes de remplissage.According to a development of the invention, each bottle can be filled with an agent delayed reagent, and is then put in place before or after pouring the concrete, without make use of filling tubes.

Description sommaire des dessinsBrief description of the drawings

D'autres avantages et caractéristiques ressortiront plus clairement de la description qui va suivre d'un mode de réalisation de l'invention donné à titre d'exemple non limitatif, et représenté aux dessins annexés, dans lesquels:

  • la figure 1 est une vue schématique en coupe d'un élément de recépage selon l'invention ;
  • la figure 2 représente le flacon de l'élément de recépage de la figure 1, associé à un organe de guidage facilitant la pénétration dans le béton ;
  • le figure 3 montre une vue en élévation du cadre de positionnement équipé de plusieurs éléments de recépage pour la mise en place avant la coulée du béton ;
  • la figure 4 est une vue en plan de la figure 3 ;
  • la figure 5 est une vue d'un flacon adapté pour le remplissage d'un agent réactif retardé ;
  • la figure 6 montre un dispositif de fixation d'un tube sur un gabarit de pose ;
  • la figure 7 représente une variante de la figure 6.
Other advantages and characteristics will emerge more clearly from the description which follows of an embodiment of the invention given by way of nonlimiting example, and represented in the appended drawings, in which:
  • Figure 1 is a schematic sectional view of a copping element according to the invention;
  • 2 shows the bottle of the copping element of Figure 1, associated with a guide member facilitating penetration into the concrete;
  • Figure 3 shows an elevational view of the positioning frame equipped with several coppers for placement before pouring concrete;
  • Figure 4 is a plan view of Figure 3;
  • FIG. 5 is a view of a bottle suitable for filling a delayed reactive agent;
  • FIG. 6 shows a device for fixing a tube to a fitting template;
  • FIG. 7 represents a variant of FIG. 6.

Description d'un mode de réalisation préférentielDescription of a preferred embodiment

En référence à la figure 1, un élément de recépage 10 pour un dispositif de démolition des ouvrages en béton, comporte un flacon 12, de préférence en matière plastique, destiné à être raccordé à un organe de support 14 constitué par un tube 16 vertical. Le flacon 12 est conformé selon une poche creuse à fond 18 fermé sensiblement plat, raccordé à une enveloppe 20 latérale tronconique. Il est clair que toute autre forme de révolution peut être utilisée pour réaliser l'enveloppe 20.With reference to FIG. 1, a cutting element 10 for a demolition device concrete structures, includes a bottle 12, preferably made of plastic, intended to be connected to a support member 14 constituted by a vertical tube 16. The bottle 12 is shaped according to a hollow bottom pocket 18 closed substantially flat, connected to a frustoconical side casing 20. It is clear that any other form of revolution can be used to make the envelope 20.

Le fond 18 peut également être bombé pour compenser la pression engendrée par le béton lors de la coulée.The bottom 18 can also be curved to compensate for the pressure generated by concrete during casting.

L'enveloppe 20 forme un angle aigu avec le fond 18, ledit angle à la base étant compris de préférence entre 25° et 60°. Un embout 22 tubulaire est agencé au sommet de l'enveloppe 20 pour recevoir l'extrémité inférieure du tube 16. La fixation du tube 16 à l'enveloppe 20 s'effectue par vissage ou par tout moyen d'assemblage.The envelope 20 forms an acute angle with the bottom 18, said angle at the base being preferably between 25 ° and 60 °. A tubular end piece 22 is arranged at top of the casing 20 to receive the lower end of the tube 16. The fixing from tube 16 to envelope 20 is effected by screwing or by any means assembly.

Selon un premier mode opératoire, l'élément de recépage 10 est introduit verticalement dans le béton frais 24 après l'opération de coulée du béton. La longueur du tube 16 est choisie pour permettre la venue en saillie de l'extrémité supérieure, laquelle sert d'orifice d'accès 26 pour la mise en place d'un agent de destruction, par exemple du type expansif chimique ou mécanique.According to a first operating mode, the copping element 10 is introduced vertically in fresh concrete 24 after the concrete pouring operation. The length the tube 16 is chosen to allow the upper end to protrude, which serves as an access orifice 26 for the installation of a destruction agent, for example example of the chemical or mechanical expansive type.

La profondeur de pénétration de l'élément de recépage 10 dans le béton 24 détermine avec précision la zone de rupture 28. Après l'introduction de l'agent de démolition, il se produit au bout d'une certaine durée, un effet d'expansion à l'intérieur du flacon 12 en matière plastique. Les forces de réaction F résultantes sont réparties perpendiculairement le long de la paroi de l'enveloppe 20 tronconique, et engendrent des composantes radiales F1 s'étendant parallèlement au fond 18, et des composantes verticales F2 perpendiculaires au fond 18. II en résulte une fracture horizontale du béton dans le plan passant par le fond 18 plat du flacon 12 qui détermine la zone de recépage 28. L'action des composantes verticales F2 provoque un léger mouvement de soulèvement du bloc de béton lors du recépage.The depth of penetration of the cutting element 10 into the concrete 24 precisely determines the rupture zone 28. After the introduction of the demolition, it occurs after a certain period of time, an expansion effect inside from the plastic bottle 12. The resulting reaction forces F are distributed perpendicularly along the wall of the frustoconical envelope 20, and generate radial components F1 extending parallel to the bottom 18, and vertical components F2 perpendicular to the bottom 18. This results in a fracture horizontal of the concrete in the plane passing through the flat bottom 18 of the bottle 12 which determines the coppicing area 28. The action of the vertical components F2 causes a slight lifting movement of the concrete block during cutting.

Selon la figure 2, l'introduction de l'élément de recépage 10 dans le béton frais est facilitée grâce à un élément de guidage 30 fixé à la face externe du fond 18 plat. L'élément de guidage 30 est formé par un cône, réalisé par exemple en béton, dont la pointe est dirigée vers le bas, et la base est en contact avec le fond 18.According to Figure 2, the introduction of the coppers 10 in the fresh concrete is facilitated by a guide element 30 fixed to the outer face of the flat bottom 18. The guide element 30 is formed by a cone, made for example of concrete, of which the point is directed downwards, and the base is in contact with the bottom 18.

En fonction de la section de l'ouvrage en béton à recéper, une pluralité d'éléments de recépage 10 sont mis en place dans le béton frais. L'introduction de ces éléments peut s'effectuer individuellement ou groupés sur un cadre de positionnement 32 commun. L'enfoncement au moyen d'un cadre de positionnement permet une pénétration simultanée et rapide de l'ensemble des flacons 12 dans le béton frais. L'agent de démolition est ensuite introduit dans les flacons 12 par les orifices 26 des différents tubes 16. Après la réaction d'expansion de l'agent de démolition, la fracture horizontale du béton permet un recépage par un simple levage vertical du bloc de béton fracturé.Depending on the section of the concrete structure to be capped, a plurality of elements of coppicing 10 are placed in fresh concrete. The introduction of these elements can be done individually or grouped on a positioning frame 32 common. The insertion by means of a positioning frame allows a simultaneous and rapid penetration of all the bottles 12 into the fresh concrete. The demolition agent is then introduced into the bottles 12 through the openings 26 of the different tubes 16. After the expansion reaction of the demolition agent, the fracture horizontal concrete allows coppicing by a simple vertical lifting of the block fractured concrete.

Selon la variante des figures 3 et 4, le cadre de positionnement 32 équipé des différents éléments de recépage 10, est mis en place avant la coulée du béton 24. Le cadre de positionnement 32 est fixé préalablement aux armatures 34 en attente du pieu par des entretoises 36 angulairement espacées entre les tubes 16, et reposant sur un cerce 39 solidaire des armatures.According to the variant of Figures 3 and 4, the positioning frame 32 equipped with different grading elements 10, is put in place before pouring the concrete 24. The positioning frame 32 is fixed beforehand to the frames 34 awaiting pile by spacers 36 angularly spaced between the tubes 16, and resting on a hoop 39 secured to the frames.

Les armatures 34 sont formées par des fers à béton en acier entourant coaxialement les tubes 16, et les entretoises 36 s'étendent radialement vers l'intérieur de cadre de positionnement 32 pour définir l'orifice interne 38 de passage du tuyau de coulée (non représenté) du béton. Tous les fonds 18 des flacons 12 sont disposés sensiblement dans un même plan horizontal.The reinforcements 34 are formed by steel concrete irons coaxially surrounding the tubes 16 and the spacers 36 extend radially inwards from the frame of positioning 32 to define the internal orifice 38 for passage of the pouring pipe (not shown) concrete. All the bottoms 18 of the bottles 12 are arranged substantially in the same horizontal plane.

Dans les deux cas de mise en place des éléments de recépage 10 après ou avant la coulée du béton, les tubes 16 d'amenée de l'agent expansif restent intégrés dans le bloc de béton récupéré après recépage.In both cases of placement of the coppicing elements 10 after or before the pouring concrete, the tubes 16 for supplying the expanding agent remain integrated in the concrete block recovered after coppicing.

Le fond 18 plat des flacons 12 permet d'obtenir une fracture horizontale du bloc de béton suivant la zone de recépage 28. Il est clair qu'une fracture en diagonale peut être obtenue au moyen de flacons ayant des fonds inclinés selon un angle prédéterminé correspondant au plan de fracture.The flat bottom 18 of the bottles 12 makes it possible to obtain a horizontal fracture of the block of concrete along the coppicing zone 28. It is clear that a diagonal fracture can be obtained by means of bottles having bottoms inclined at an angle predetermined corresponding to the fracture plane.

Selon une autre variante de réalisation, les flacons 12 ne sont pas prolongés par des tubes 16, mais sont remplis directement par un agent expansif retardé de nature chimique ou mécanique. Sur la figure 5, chaque flacon 112 comporte à cet effet un fond 118 constitué par un couvercle amovible, lequel est fermé après le remplissage par l'agent expansif retardé. Dans ce cas, l'embout 122 est obturé, et la forme conique ou tronconique de l'enveloppe 120 est similaire à celle de la figure 1.According to another alternative embodiment, the bottles 12 are not extended by tubes 16, but are filled directly with a delayed expanding agent chemical or mechanical. In Figure 5, each bottle 112 has for this purpose a bottom 118 consisting of a removable cover, which is closed after filling with the expansive agent delayed. In this case, the end piece 122 is closed, and the conical shape or frustoconical of the envelope 120 is similar to that of FIG. 1.

Les flacons 112 remplis avec l'agent expansif retardé, sont soit mis en place avant la coulée du béton au moyen d'un cadre de support, soit introduits dans le béton frais après la coulée par l'intermédiaire d'une tige récupérable.The bottles 112 filled with the delayed expansive agent, are either put in place before the pouring concrete by means of a support frame, or introduced into fresh concrete after casting via a recoverable rod.

L'effet retardateur d'expansion peut avoir une durée spécifique, de préférence supérieure à 2 jours, en fonction de la dimension de l'ouvrage, de la nature du béton et de la température ambiante.The expansion delay effect may have a specific duration, preferably more than 2 days, depending on the size of the structure, the nature of the concrete and of room temperature.

La matière plastique des flacons 12, 112 peut être remplacée par tout autre matériau équivalent cassable ou déformable, par exemple du verre.The plastic material of the vials 12, 112 can be replaced by any other material breakable or deformable equivalent, for example glass.

Sur la figure 6, un dispositif de fixation 200 d'un tube 16 sur un gabarit de pose 202, comporte une pince de serrage 203 associée à un profilé support 204 dans lequel est enfilé un tube 16. Le profilé 204 possède deux branches élastiques destinées à se rapprocher ou à s'écarter en fonction de la position fermée ou ouverte de la pince 203.In FIG. 6, a device 200 for fixing a tube 16 to a fitting template 202, comprises a collet 203 associated with a support profile 204 in which a tube 16 is threaded. The profile 204 has two elastic branches intended to approach or move away depending on the closed or open position of the clamp 203.

Après la coulée du béton, le gabarit de pose 202 équipé d'une pluralité de tubes 16 et de flacons 12, est mis en place sur le cerce 39. La pince 203 est actionnée vers la position desserrée, et on descend individuellement chaque tube 16 vers le fond. En fin de course, la pince 203 est fermée pour assurer le blocage du tube 36.After pouring the concrete, the laying template 202 equipped with a plurality of tubes 16 and bottles 12, is placed on the hoop 39. The clamp 203 is actuated towards the loosened position, and each tube 16 is lowered individually towards the bottom. In limit switch, the clamp 203 is closed to block the tube 36.

Après l'opération de recépage, on ouvre toutes les pinces 203, et le gabarit de pose 202 est ainsi réutilisable sur le chantier pour le recépage d'un autre autre pieu de même dimension.After the coppicing operation, all the pliers 203 are opened, and the installation template 202 is thus reusable on the site for the coppicing of another pile of same dimension.

En référence à la figure 7, le dispositif de fixation 300 du tube 16 est formé par une pièce de clipsage 302 de section sensiblement circulaire, et déformation élastiquement.Referring to Figure 7, the fastening device 300 of the tube 16 is formed by a clip part 302 of substantially circular section, and deformation elastically.

Claims (11)

  1. A device for cut-off or demolition of a concrete part, comprising means for inserting at least one cut-off element (10) equipped with an elemental recipient designed to receive a demolition agent of chemical or mechanical nature to cause cracking of the concrete part by expansion effect,
    characterized in that the recipient of each cut-off element (10) is formed by a flask (12, 112), made in particular of plastic material, having a closed base (18, 118), and a lateral casing (20, 120) forming an acute angle with the base, said angle being comprised between 25° and 60° to generate expansion forces for fracturing of the concrete part along the breaking zone (28) defined by the base (18, 118) of said flask, and a lifting movement of small amplitude of the concrete block after cut-off.
  2. The device for cut-off of a concrete part according to claim 1, characterized in that the apex of the casing (20, 120) is fixed to a support means (14) for inserting the base (18, 118) down to the breaking zone.
  3. The device for cut-off of a concrete part according to claim 2, characterized in that the support means (14) of a cut-off element (10) comprise a rigid tube (16) joined to a tubular connecting spout (22) arranged at the apex of the casing (20), said tube acting as inlet channel for insertion of the demolition agent into the flask (12).
  4. The device for cut-off of a concrete part according to one of the claims 1 to 3, characterized in that the base (18) of the flask (12) is associated to a guiding means (30) to facilitate penetration of the cut-off element (10) into the previously cast fresh concrete.
  5. The device for cut-off of a concrete part according to one of the claims 1 to 4, characterized in that the flat base (18) of the flask (12) of each cut-off element (10) is arranged horizontally and extending perpendicularly to the direction of insertion.
  6. The device for cut-off of a concrete part according to one of the claims 1 to 4, characterized in that the flat base (18) of the flask (12) of each cut-off element is inclined or slightly convex with respect to the direction of insertion.
  7. The device for cut-off of a concrete part according to one of the claims 1 to 6, characterized in that insertion of each cut-off element (10) can be performed individually, or grouped by means of a positioning frame (32), before or after the concrete casting operation, the lateral casing (20, 120) of each cut-off element (10) having a tapered shape.
  8. The device for cut-off of a concrete part according to claim 7, characterized in that the positioning frame (32) is fixed before the concrete casting operation to salient reinforcing bars (34) by means of spacers (36) spaced angularly between the different tubes (16) of the cut-off elements (10) and resting on a hoop (39) securedly affixed to the reinforcing bars (34).
  9. The device for cut-off of a concrete part according to claim 8, characterized in that the spacers (36) extend radially towards the inside of the positioning frame (32) to confine an orifice (38) for axial passage of the concrete casting pipe.
  10. The device for cut-off of a concrete part according to claim 1, characterized in that the flask (112) is filled with a delayed-action reactive agent and is placed in position before or after the concrete is cast.
  11. The device for cut-off of a concrete part according to claim 3,
    characterized in that each tube (16) is assembled on a support jig (202) by means of a fixing device (200, 300) comprising a securing clamp (203) or a clipping part (302).
EP99959474A 1998-12-11 1999-12-10 Cut-off device for concrete structures Expired - Lifetime EP1147264B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR9815848 1998-12-11
FR9815848A FR2787131B1 (en) 1998-12-11 1998-12-11 RECEPTION DEVICE FOR CONCRETE STRUCTURES
PCT/FR1999/003088 WO2000036228A1 (en) 1998-12-11 1999-12-10 Cut-off device for concrete structures

Publications (2)

Publication Number Publication Date
EP1147264A1 EP1147264A1 (en) 2001-10-24
EP1147264B1 true EP1147264B1 (en) 2003-04-23

Family

ID=9534010

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99959474A Expired - Lifetime EP1147264B1 (en) 1998-12-11 1999-12-10 Cut-off device for concrete structures

Country Status (21)

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US (1) US6623212B1 (en)
EP (1) EP1147264B1 (en)
JP (1) JP4118517B2 (en)
KR (1) KR100707109B1 (en)
CN (1) CN1332098C (en)
AT (1) ATE238458T1 (en)
AU (1) AU1663500A (en)
BR (1) BR9916100A (en)
CA (1) CA2353967A1 (en)
CZ (1) CZ299514B6 (en)
DE (1) DE69907273T2 (en)
ES (1) ES2198159T3 (en)
FR (1) FR2787131B1 (en)
HK (1) HK1039972B (en)
HU (1) HUP0104597A3 (en)
IL (1) IL143497A (en)
MX (1) MXPA01005715A (en)
PL (1) PL203381B1 (en)
PT (1) PT1147264E (en)
TR (1) TR200101694T2 (en)
WO (1) WO2000036228A1 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7621097B2 (en) * 2006-11-07 2009-11-24 Weston Wilhour System and method for casting column bases for a post frame structure
FR2913034B1 (en) * 2007-02-23 2009-05-22 Recepieux Soc Par Actions Simp INSPECTION DEVICE WITH CONTROLLED TRIGGERING
CN110130674B (en) * 2019-06-28 2021-07-02 绍兴文理学院 Super-large pre-buried crushing hole device for static crushing and using method thereof
JP7165461B1 (en) * 2022-07-05 2022-11-04 千代田ソイルテック株式会社 Removal method of crushing device and columnar improvement pile

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3432977A (en) * 1967-03-08 1969-03-18 Us Navy Application of shaped charge to earth anchor
US3496729A (en) * 1968-05-24 1970-02-24 Bernd Pleuger Protective tube for concrete pile
US4165198A (en) * 1976-09-07 1979-08-21 Farmer Foundation Company Method for forming pier foundation columns
JPS5670324A (en) * 1979-11-12 1981-06-12 Shogo Matsugishi Concrete crushing body and crushing method of concrete structure
JPS5985023A (en) * 1982-11-05 1984-05-16 Shotaro Shimura On-site pile driving work
JPS5991214A (en) * 1982-11-18 1984-05-25 Sumitomo Cement Co Ltd Head treatment work of on-site pile
JPS6059223A (en) * 1983-09-08 1985-04-05 Hazama Gumi Ltd Treatment of head of cast-in-place pile
US4673157A (en) * 1985-11-13 1987-06-16 Wells Gordon T Footing form
US4767241A (en) * 1985-11-13 1988-08-30 Wells Gordon T Method for simultaneous forming of concrete footings and piers
US5622453A (en) * 1995-04-27 1997-04-22 The United States Of America As Represented By The United States Department Of Energy Method and apparatus for in-densification of geomaterials for sealing applications
FR2767346A1 (en) * 1997-08-12 1999-02-19 Dominique Fonfrede RECEPTION METHOD AND DEVICE FOR CONCRETE WORKPIECES

Also Published As

Publication number Publication date
KR100707109B1 (en) 2007-04-13
MXPA01005715A (en) 2003-07-14
PL203381B1 (en) 2009-09-30
CA2353967A1 (en) 2000-06-22
PT1147264E (en) 2003-11-28
EP1147264A1 (en) 2001-10-24
HUP0104597A3 (en) 2002-04-29
CN1329690A (en) 2002-01-02
HUP0104597A2 (en) 2002-03-28
AU1663500A (en) 2000-07-03
PL348183A1 (en) 2002-05-06
IL143497A (en) 2005-06-19
BR9916100A (en) 2001-09-04
WO2000036228A1 (en) 2000-06-22
FR2787131B1 (en) 2001-03-16
JP4118517B2 (en) 2008-07-16
CZ20012047A3 (en) 2002-06-12
CN1332098C (en) 2007-08-15
FR2787131A1 (en) 2000-06-16
IL143497A0 (en) 2002-04-21
ES2198159T3 (en) 2004-01-16
JP2002532642A (en) 2002-10-02
TR200101694T2 (en) 2002-01-21
HK1039972A1 (en) 2002-05-17
DE69907273T2 (en) 2004-05-06
DE69907273D1 (en) 2003-05-28
US6623212B1 (en) 2003-09-23
ATE238458T1 (en) 2003-05-15
HK1039972B (en) 2007-11-09
KR20010093153A (en) 2001-10-27
CZ299514B6 (en) 2008-08-20

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