WO1999007947A1 - Method and device for cutting down concrete wrought works - Google Patents
Method and device for cutting down concrete wrought works Download PDFInfo
- Publication number
- WO1999007947A1 WO1999007947A1 PCT/FR1998/001791 FR9801791W WO9907947A1 WO 1999007947 A1 WO1999007947 A1 WO 1999007947A1 FR 9801791 W FR9801791 W FR 9801791W WO 9907947 A1 WO9907947 A1 WO 9907947A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- reservation
- concrete
- cage
- coppicing
- bars
- 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.)
- Ceased
Links
Classifications
-
- 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 process for cutting out or demolishing concrete work pieces, in particular in the form of piles, bars or diaphragm walls.
- the object of the invention is to develop a method and a device for coppicing or demolishing part of a concrete structure, without affecting the mechanical strength of the rest of the structure.
- the method of the invention is characterized by the following successive steps: - setting up before the concrete pouring operation, reservation means covered by a flexible material which does not adhere with the concrete,
- the reservation means comprise a removable cage having a plurality of rigid bars secured to a holding frame bearing on support means provided at the ends of the reinforcing reinforcements , the length of the bars of the reservation cage corresponding substantially to the height of the concrete part to be exploded.
- the bars of the reservation cage are equipped with pockets intended to remain trapped inside the mass of hardened concrete, so as to form a plurality of reservoirs communicating with the different reservation channels created when the bars are removed from said cage.
- the reinforcing reinforcements are surrounded by sheaths made of flexible non-stick material with concrete.
- the reservation cage support means comprise a horizontal hoop made of metal wire welded to the upper ends of the frames of the structure to form a support ring for positioning rods subject to the reservation cage.
- the reservation means may include additional reservation elements made of flexible materials to create a discontinuity at the level of the horizontal cutting area.
- FIG. 1 is a schematic sectional view of the copping device according to the invention, during the establishment of the reservation cage between the reinforcement reinforcements of the structure, and before the concrete pouring;
- FIG. 3 is an identical view to Figure 1 after the complete insertion of the reservation cage;
- - Figure 4 shows a sectional view along line 4-4 of Figure 3;
- FIG. 8 shows the concrete block after cracking following the insertion of an expansion product
- - Figure 9 is a plan view of Figure 8.
- a coppicing or demolition device 10 for concrete structures, in particular piles, bars or diaphragm walls comprises a removable reservation cage 12 provided with a plurality of rigid bars 14 secured to a double retaining frame 16.
- the steel bars 14, for example concrete irons of cylindrical sections, extend parallel to each other in the vertical direction, and are distributed circumferentially in several concentric series, FIG. 4 representing two series A, B as an example.
- the double holding frame 16 of the bars 14 further comprises lifting members 18, and positioning rods 20 arranged in a horizontal plane perpendicular to the bars 14.
- Each bar 14 of the reservation cage 12 is equipped with a sheath 22 tubular made of flexible material which does not adhere to concrete when it hardens.
- the cylindrical reservation cage 12 is dimensioned as a function of the structure to be produced, and is introduced in the vertical direction of the arrow F1 (FIG. 1) inside a series of reinforcing frames 24 projecting from the hole 26 drilling made in the ground.
- the metal reinforcements 24 are angularly separated from each other at regular intervals, extending along parallel generatrices of a cylinder 28, the diameter of which is greater than that of the external series A of the bars 14 of the reservation cage 12.
- a horizontal hoop 30 of metal wire to form a crown for supporting the positioning rods 20 of the reservation cage 12.
- the frames 24 at the level of the coppicing area are also reinforced by at least a strapping wire 32 intended to stiffen the remaining non-demolished part.
- the frames 24 are surrounded by tubular sleeves 34 made of a flexible material comparable to that of the other sleeves 22 of bars 14.
- the sleeves 34 of frames 24 extend between the lower strapping wire 32 and the upper hoop 30, and allow to absorb the thrust forces during the expansion reaction, while avoiding the adhesion of the concrete to the reinforcements 24.
- the non-stick material of the sleeves 22 and 34 consists, for example, of a polyethylene foam or other compressible polymer, but any other material can be used, in particular cardboard.
- additional reservation elements 36 (FIG. 2) made of flexible material, interposed between the reinforcements 24, bearing on the strapping wire 32.
- the presence of these reservation elements 36 creates a discontinuity in the horizontal coppicing plane, so as to stop any propagation of cracks beyond the authorized area.
- the length of the straight bars 14 of the reservation cage 12 corresponds substantially to the height of the concrete part to be exploded during the coppicing operation.
- the bars 14 can advantageously be aligned in a radial direction with reinforcements 24 (FIG. 4).
- a first series of pockets 38 is attached along the bars 14, and a second series of pockets 40 is fixed to the ends of the bars 14 opposite the support frame. 16.
- the pockets 38, 40 remain trapped inside the concrete mass, and constitute a plurality of elementary reservoirs intended to receive a blowing agent facilitating the cracking of the burst concrete piece. All reservations and pockets are defined in number, shapes, dimensions, and locations according to the demolition specifications.
- a pocket 38 is attached by means of attachment to a bar 14 of the reservation cage 12.
- an end pocket 40 in the form of a balloon is independently fixed at the end of the bar 14 by means of an assembly member 42 axially connected to the bar 14, and also serving to prevent any propagation of the cracking beyond the desired area.
- FIG. 7 shows a variant of an end pocket 40A having an attachment collar 44 into which the end of the bar 14 partially penetrates.
- the example of copping illustrated in figs 1 to 9 relates to the pouring of a concrete pile, following a drilling of a hole 26, and installation of a cylindrical formwork (not shown).
- the depth of the hole 26 can reach several tens of meters and the sleeves 34 are threaded on the frames 24.
- the reservation cage 12 equipped with the sleeves 22 and pockets 38, 40, is then introduced concentrically between the frames 24 until the coming into engagement of the positioning rods 20 on the support hoop 30.
- the pockets 40 arrive substantially at the level of the strapping wire 32, and the bars 14 of the reservation cage 12 extend parallel to the frames 24.
- the reservation cage 12 is removed by pulling it upwards by means of a lifting machine.
- the sleeves 22 are removed manually from the cage 12, the other sleeves 34 of the frames remaining in place.
- the withdrawal of the cage 12 then leaves a network of vertical reservation channels remaining in communication with the various pockets 38, 40 tanks.
- the cracks 50 are established in multidirectional mesh, and then facilitate the dismantling of the exploded concrete blocks, for example by means of a crowbar.
- the coppicing area is in a horizontal plane at the level of the reservation elements 36.
- the copping or demolition device 10 can be used for any other concrete structure, in particular in the form of bars or diaphragm walls. You just have to adapt the shape and dimensions of the reservation cage.
- the reservation cage is capable of being reused after having re-equipped it with flexible sleeves 22, and with reservoir pockets 38, 40, 40A.
- the sleeves 22 are capable of communicating with each other by horizontal tubular connections at the level of the coppicing zone.
- the reservation cage 12 is arranged coaxially inside a cylinder 28, the parallel generators of which are constituted by the metal reinforcements 24.
- the different sleeves 22 of the reservation cage 12 can communicate with each other by means of a network of tubular connections arranged horizontally at the level of the coppicing zone.
Landscapes
- 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)
- Piles And Underground Anchors (AREA)
Abstract
Description
Procédé et dispositif de recépage pour des pièces d'ouvrage e n béton.Method and device for coppicing for concrete work pieces.
Domaine technique de l'inventionTechnical field of the invention
L'invention est relative à un procédé pour recéper ou démolir les pièces d'ouvrage en béton, notamment en forme de pieux, de barrettes ou de parois moulées.The invention relates to a process for cutting out or demolishing concrete work pieces, in particular in the form of piles, bars or diaphragm walls.
Etat de la techniqueState of the art
Lors de la fabrication de pieux en béton, on procède d'abord au forage d'un trou pouvant atteindre plusieurs dizaines de mètres de profondeur, avec mise en place progressive d'un coffrage modulaire. En fin d'opération de coulée de béton, la portion terminale du béton durci est chargée de différentes particules à base de gravats et de terre, qui affecte la résistance mécanique du béton. Il est classique de détruire cette portion de béton au moyen d'un marteau- piqueur pneumatique pouvant être combiné avec l'injection d'un produit chimique d'expansion. L'emploi du marteau-piqueur crée des vibrations mécaniques qui risquent de fissurer toute la structure de l'ouvrage au-delà de la limite de recépage, et sans possibilité de contrôler cet état de fissuration. Les risques humains d'accidents de travail dûs à l'emploi d'un marteau- piqueur ne sont pas exclure en fonction du lieu et des conditions de travail, notamment lorsque l'ouvrier est obligé de travailler sur des surfaces étroites et en hauteur, hérissées d'armatures de ferraillage en attente. L'injection du produit chimique d'expansion nécessite d'autre part un forage préalable dans le béton à détruire de plusieurs saignées ou trous, lesquels sont réalisés au moyen d'un perforateur. Outre l'apparition des vibrations mécaniques risquant d'ébranler l'ouvrage, se pose le problème de l'étirement des armatures en acier dû à la poussée exercée par la réaction d'expansion de l'agent chimique. Les contraintes mécaniques exercées sur les armatures, et la propagation de la fissuration au-delà de la zone de recépage affectent la tenue mécanique de l'ouvrage en béton.When manufacturing concrete piles, we first drill a hole that can reach several tens of meters deep, with progressive installation of a modular formwork. At the end of the concrete casting operation, the end portion of the hardened concrete is loaded with various particles based on rubble and earth, which affects the mechanical strength of the concrete. It is conventional to destroy this portion of concrete by means of a pneumatic jackhammer which can be combined with the injection of an expansion chemical. The use of a jackhammer creates mechanical vibrations which risk cracking the entire structure of the structure beyond the cutting limit, and without the possibility of controlling this state of cracking. The human risks of work accidents due to the use of a jackhammer cannot be excluded depending on the place and working conditions, especially when the worker is forced to work on narrow and high surfaces, bristling with pending reinforcement. The injection of the expansion chemical also requires a prior drilling in the concrete to be destroyed of several grooves or holes, which are made by means of a perforator. Besides the appearance of mechanical vibrations which could to shake the structure, there is the problem of stretching the steel reinforcements due to the thrust exerted by the expansion reaction of the chemical agent. The mechanical stresses exerted on the reinforcement, and the propagation of the cracking beyond the coppicing zone affect the mechanical strength of the concrete structure.
Objet de l'inventionSubject of the invention
L'objet de l'invention consiste à élaborer un procédé et un dispositif de recépage ou de démolition d'une partie d'un ouvrage en béton, sans affecter la tenue mécanique du reste de l'ouvrage.The object of the invention is to develop a method and a device for coppicing or demolishing part of a concrete structure, without affecting the mechanical strength of the rest of the structure.
Le procédé de l'invention est caractérisé par les étapes successives suivantes: - mise en place avant l'opération de coulée de béton, de moyens de réservation recouverts par un matériau souple n'adhérant pas avec le béton,The method of the invention is characterized by the following successive steps: - setting up before the concrete pouring operation, reservation means covered by a flexible material which does not adhere with the concrete,
- coulée du béton,- concrete pouring,
- après durcissement du béton, retrait des moyens de réservation pour ménager un réseau de canaux creux à l'intérieur de la masse de béton, -mise en place dans les canaux d'un agent d'expansion permettant la fissuration et l'éclatement de la masse de béton,- After hardening of the concrete, withdrawal of the reservation means to provide a network of hollow channels inside the mass of concrete, - placement in the channels of an expanding agent allowing cracking and bursting of the mass of concrete,
- et démontage des blocs de béton éclatés par une action manuelle ou mécanique.- and dismantling of broken concrete blocks by manual or mechanical action.
Selon un mode de réalisation préférentiel du dispositif de mise en oeuvre du procédé, les moyens de réservation comportent une cage amovible ayant une pluralité de barres rigides solidaires d'un cadre de maintien prenant appui sur des moyens de support prévus aux extrémités des armatures de renfort, la longueur des barres de la cage de réservation correspondant sensiblement à la hauteur de la pièce de béton à éclater. Les barres de la cage de réservation sont équipées de poches destinées à rester emprisonnées à l'intérieur de la masse de béton durci, de manière à former une pluralité de réservoirs communiquant avec les différents canaux de réservation créés lors du retrait des barres de ladite cage.According to a preferred embodiment of the device for implementing the method, the reservation means comprise a removable cage having a plurality of rigid bars secured to a holding frame bearing on support means provided at the ends of the reinforcing reinforcements , the length of the bars of the reservation cage corresponding substantially to the height of the concrete part to be exploded. The bars of the reservation cage are equipped with pockets intended to remain trapped inside the mass of hardened concrete, so as to form a plurality of reservoirs communicating with the different reservation channels created when the bars are removed from said cage.
Pour résister aux efforts de poussée dus à la réaction d'expansion, les armatures de renfort sont entourées par des fourreaux en matériau souple anti-adhérent avec le béton.To resist the thrust forces due to the expansion reaction, the reinforcing reinforcements are surrounded by sheaths made of flexible non-stick material with concrete.
Les moyens de support de la cage de réservation comportent un cerceau horizontal réalisé en fil métallique soudé aux extrémités supérieures des armatures de l'ouvrage pour constituer une couronne d'appui pour des tiges de positionnement assujetties à la cage de réservation.The reservation cage support means comprise a horizontal hoop made of metal wire welded to the upper ends of the frames of the structure to form a support ring for positioning rods subject to the reservation cage.
Les moyens de réservation peuvent comporter des éléments de réservation additionnels en matériaux souple pour créer une discontinuité au niveau de la zone horizontale de recépage.The reservation means may include additional reservation elements made of flexible materials to create a discontinuity at the level of the horizontal cutting area.
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 :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:
- la figure 1 est une vue schématique en coupe du dispositif de recépage selon l'invention, lors de la mise en place de la cage de réservation entre les armatures de ferraillage de l'ouvrage, et avant la coulée de béton ;- Figure 1 is a schematic sectional view of the copping device according to the invention, during the establishment of the reservation cage between the reinforcement reinforcements of the structure, and before the concrete pouring;
- la figure 2 montre l'agencement des armatures de ferraillage, et des éléments de réservation additionnels au niveau de la zone de recépage ;- Figure 2 shows the arrangement of the reinforcements of reinforcement, and additional reservation elements at the level of the coppicing area;
- la figure 3 est une vue identique de la figure 1 après l'insertion complète de la cage de réservation ; - la figure 4 représente une vue en coupe selon la ligne 4-4 de la figure 3 ;- Figure 3 is an identical view to Figure 1 after the complete insertion of the reservation cage; - Figure 4 shows a sectional view along line 4-4 of Figure 3;
- les figures 5 à 7 montrent des vues de détail, à échelle agrandie, des poches réservoirs équipant les barres de la cage de réservation ;- Figures 5 to 7 show detailed views, on an enlarged scale, of the reservoir pockets fitted to the bars of the reservation cage;
- la figure 8 montre le bloc de béton après fissuration suite à l'insertion d'un produit d'expansion ; - la figure 9 est une vue en plan de la figure 8.- Figure 8 shows the concrete block after cracking following the insertion of an expansion product; - Figure 9 is a plan view of Figure 8.
Description d'un mode de réalisation préférentielDescription of a preferred embodiment
En référence aux figures 1 à 4, un dispositif de recépage ou de démolition 10 pour des ouvrages en béton, notamment des pieux, des barrettes ou des parois moulées, comporte une cage de réservation 12 amovible dotée d'une pluralité de barres 14 rigides assujetties à un double cadre de maintien 16. Les barres 14 en acier, par exemple des fers à béton de sections cylindriques, s'étendent parallèlement entre elles selon la direction verticale, et sont réparties circonférentiellement en plusieurs séries concentriques, la figure 4 représentant deux séries A, B à titre d'exemple.With reference to FIGS. 1 to 4, a coppicing or demolition device 10 for concrete structures, in particular piles, bars or diaphragm walls, comprises a removable reservation cage 12 provided with a plurality of rigid bars 14 secured to a double retaining frame 16. The steel bars 14, for example concrete irons of cylindrical sections, extend parallel to each other in the vertical direction, and are distributed circumferentially in several concentric series, FIG. 4 representing two series A, B as an example.
Le double cadre de maintien 16 des barres 14 comprend de plus des organes de levage 18, et des tiges de positionnement 20 agencées dans un plan horizontal perpendiculaire aux barres 14. Chaque barre 14 de la cage de réservation 12 est équipé d'un fourreau 22 tubulaire en matériau souple n'adhérant pas avec le béton lors de son durcissement.The double holding frame 16 of the bars 14 further comprises lifting members 18, and positioning rods 20 arranged in a horizontal plane perpendicular to the bars 14. Each bar 14 of the reservation cage 12 is equipped with a sheath 22 tubular made of flexible material which does not adhere to concrete when it hardens.
La cage de réservation 12 cylindrique est dimensionnee en fonction de l'ouvrage à réaliser, et est introduite dans le sens vertical de la flèche F1 (figure 1 ) à l'intérieur d'une série d'armatures 24 de renfort faisant saillie du trou 26 de forage ménagé dans le sol. Les armatures 24 métalliques sont séparées angulairement les unes des autres selon des intervalles réguliers, en s'étendant selon des génératrices parallèles d'un cylindre 28, dont le diamètre est supérieur à celui de la série extérieure A des barres 14 de la cage de réservation 12.The cylindrical reservation cage 12 is dimensioned as a function of the structure to be produced, and is introduced in the vertical direction of the arrow F1 (FIG. 1) inside a series of reinforcing frames 24 projecting from the hole 26 drilling made in the ground. The metal reinforcements 24 are angularly separated from each other at regular intervals, extending along parallel generatrices of a cylinder 28, the diameter of which is greater than that of the external series A of the bars 14 of the reservation cage 12.
Aux extrémités supérieures des armatures 24 est soudé un cerceau 30 horizontal de fil métallique pour constituer une couronne de support des tiges de positionnement 20 de la cage de réservation 12. Les armatures 24 au niveau de la zone de recépage, sont également renforcées par au moins un fil de cerclage 32 destiné à rigidifier la partie restante non démolie. Les armatures 24 sont entourées par des fourreaux 34 tubulaires réalisées en un matériau souple comparable à celui des autres fourreaux 22 des barres 14. Les fourreaux 34 des armatures 24 s'étendent entre le fil de cerclage 32 inférieur , et le cerceau 30 supérieur, et permettent d'amortir les forces de poussée lors de la réaction d'expansion, tout en évitant l'adhérence du béton sur les armatures 24.At the upper ends of the frames 24 is welded a horizontal hoop 30 of metal wire to form a crown for supporting the positioning rods 20 of the reservation cage 12. The frames 24 at the level of the coppicing area are also reinforced by at least a strapping wire 32 intended to stiffen the remaining non-demolished part. The frames 24 are surrounded by tubular sleeves 34 made of a flexible material comparable to that of the other sleeves 22 of bars 14. The sleeves 34 of frames 24 extend between the lower strapping wire 32 and the upper hoop 30, and allow to absorb the thrust forces during the expansion reaction, while avoiding the adhesion of the concrete to the reinforcements 24.
Le matériau anti-adhérant des fourreaux 22 et 34 est constitué à titre d'exemple par une mousse de polyéthylène ou autre polymère compressible, mais tout autre matériau est utilisable, notamment du carton.The non-stick material of the sleeves 22 and 34 consists, for example, of a polyethylene foam or other compressible polymer, but any other material can be used, in particular cardboard.
En limite de la zone de recépage sont disposés horizontalement des éléments de réservation 36 additionnels (figure 2) en matériau souple, intercalés entre les armatures 24 en prenant appui sur le fil de cerclage 32. La présence de ces éléments de réservation 36 crée une discontinuité dans le plan horizontal de recépage, de manière à stopper toute propagation de fissures au-delà de la zone autorisée.At the limit of the coppicing area are horizontally arranged additional reservation elements 36 (FIG. 2) made of flexible material, interposed between the reinforcements 24, bearing on the strapping wire 32. The presence of these reservation elements 36 creates a discontinuity in the horizontal coppicing plane, so as to stop any propagation of cracks beyond the authorized area.
La longueur des barres 14 rectilignes de la cage de réservation 12 correspond sensiblement à la hauteur de la pièce de béton à éclater lors de l'opération de recépage. Les barres 14 peuvent être avantageusement alignées selon une direction radiale avec des armatures 24 (figure 4).The length of the straight bars 14 of the reservation cage 12 corresponds substantially to the height of the concrete part to be exploded during the coppicing operation. The bars 14 can advantageously be aligned in a radial direction with reinforcements 24 (FIG. 4).
En fonction du volume et de la nature de la pièce de béton, une première série de poches 38 est attachée le long des barres 14, et une deuxième série de poches 40 est fixée aux extrémités des barres 14 à l'opposé du cadre de maintien 16. Lors du retrait de la cage de réservation 12 après durcissement du béton, les poches 38, 40 restent emprisonnées à l'intérieur de la masse de béton, et constituent une pluralité de réservoirs élémentaires destinés à recevoir un agent d'expansion facilitant la fissuration de la pièce de béton à éclater. Toutes les réservations et poches sont définies en nombre, formes, dimensions, et emplacements selon les spécifications de démolition. Sur la figure 5 , une poche 38 est attachée par des moyens de fixation à une barre 14 de la cage de réservation 12.Depending on the volume and the nature of the concrete part, a first series of pockets 38 is attached along the bars 14, and a second series of pockets 40 is fixed to the ends of the bars 14 opposite the support frame. 16. When removing the reserve cage 12 after the concrete has hardened, the pockets 38, 40 remain trapped inside the concrete mass, and constitute a plurality of elementary reservoirs intended to receive a blowing agent facilitating the cracking of the burst concrete piece. All reservations and pockets are defined in number, shapes, dimensions, and locations according to the demolition specifications. In FIG. 5, a pocket 38 is attached by means of attachment to a bar 14 of the reservation cage 12.
Sur la figure 6 , une poche 40 d'extrémité en forme de ballon est fixée de manière indépendante au bout de la barre 14 grâce à un organe d'assemblage 42 relié axialement à la barre 14, et servant également à empêcher toute propagation de la fissuration au-delà de la zone désirée.In FIG. 6, an end pocket 40 in the form of a balloon is independently fixed at the end of the bar 14 by means of an assembly member 42 axially connected to the bar 14, and also serving to prevent any propagation of the cracking beyond the desired area.
La figure 7 montre une variante de poche 40A d'extrémité ayant un col d'attache 44 dans lequel pénètre partiellement le bout de la barre 14. Un fil de mise en forme 46 en matériau métallique ou plastique, est agencé à l'intérieur de la poche 40A pour éviter l'écrasement de cette dernière lors de la coulée du béton.FIG. 7 shows a variant of an end pocket 40A having an attachment collar 44 into which the end of the bar 14 partially penetrates. A shaping wire 46 made of metallic or plastic material, is arranged inside the pocket 40A to avoid crushing of the latter during the pouring of the concrete.
La mise en oeuvre du procédé de recépage ou de démolition selon l'invention s'effectue de la manière suivante :The implementation of the coppicing or demolition process according to the invention is carried out as follows:
L'exemple de recépage illustré sur les figues 1 à 9 concerne la coulée d'un pieu en béton, suite à un forage d'un trou 26, et mise en place d'un coffrage cylindrique (non représenté). La profondeur du trou 26 peut atteindre plusieurs dizaines de mètres et les fourreaux 34 sont enfilés sur les armatures 24. La cage de réservation 12 équipée des fourreaux 22 et des poches 38, 40, est ensuite introduite concentriquement entre les armatures 24 jusqu'à la venue en engagement des tiges de positionnement 20 sur le cerceau 30 de support. Les poches 40 arrivent sensiblement au niveau du fil de cerclage 32, et les barres 14 de la cage de réservation 12 s'étendent parallèlement aux armatures 24.The example of copping illustrated in figs 1 to 9 relates to the pouring of a concrete pile, following a drilling of a hole 26, and installation of a cylindrical formwork (not shown). The depth of the hole 26 can reach several tens of meters and the sleeves 34 are threaded on the frames 24. The reservation cage 12 equipped with the sleeves 22 and pockets 38, 40, is then introduced concentrically between the frames 24 until the coming into engagement of the positioning rods 20 on the support hoop 30. The pockets 40 arrive substantially at the level of the strapping wire 32, and the bars 14 of the reservation cage 12 extend parallel to the frames 24.
Après l'opération de coulée du béton, et durcissement de ce dernier, on procède au retrait de la cage de réservation 12 en la tirant vers le haut au moyen d'un engin de levage. On effectue ensuite l'enlèvement manuel des fourreaux 22 de la cage 12, les autres fourreaux 34 des armatures restant en place. Le retrait de la cage 12 laisse alors subsister un réseau de canaux de réservation verticaux mis en communication avec les différentes poches 38, 40 réservoirs. Il suffit ensuite de placer dans les différents canaux le système ou agent de démolition choisi, et d'attendre la fissuration par expansion de la masse de béton 48 ""(figure 8). Les fissures 50 s'établissent en maillage multidirectionnel, et facilitent ensuite le démontage des blocs de béton éclatés, par exemple au moyen d'une barre à mine. La zone de recépage se trouve dans un plan horizontal au niveau des éléments de réservation 36.After the concrete pouring operation, and hardening of the latter, the reservation cage 12 is removed by pulling it upwards by means of a lifting machine. Next, the sleeves 22 are removed manually from the cage 12, the other sleeves 34 of the frames remaining in place. The withdrawal of the cage 12 then leaves a network of vertical reservation channels remaining in communication with the various pockets 38, 40 tanks. Then simply place the chosen demolition system or agent in the different channels, and wait for the cracking by expansion of the mass of concrete 48 "" (Figure 8). The cracks 50 are established in multidirectional mesh, and then facilitate the dismantling of the exploded concrete blocks, for example by means of a crowbar. The coppicing area is in a horizontal plane at the level of the reservation elements 36.
Le dispositif de recépage ou démolition 10 est utilisable pour tout autre ouvrage en béton, notamment en forme de barrettes ou de parois moulées. Il suffit d'adapter la forme et les dimensions de la cage de réservation.The copping or demolition device 10 can be used for any other concrete structure, in particular in the form of bars or diaphragm walls. You just have to adapt the shape and dimensions of the reservation cage.
La cage de réservation est susceptible d'être réutilisée après l'avoir rééquipée de fourreaux 22 souples, et de poches réservoirs 38, 40, 40A.The reservation cage is capable of being reused after having re-equipped it with flexible sleeves 22, and with reservoir pockets 38, 40, 40A.
Les fourreaux 22 sont susceptibles de communiquer entre eux par des liaisons tubulaires horizontales au niveau de la zone de recépage. La cage de réservation 12 est disposée coaxialement à l'intérieur d'un cylindre 28 dont les génératrices parallèles sont constituées par les armatures 24 métalliques de renfort.The sleeves 22 are capable of communicating with each other by horizontal tubular connections at the level of the coppicing zone. The reservation cage 12 is arranged coaxially inside a cylinder 28, the parallel generators of which are constituted by the metal reinforcements 24.
Selon une variante, les différents fourreaux 22 de la cage de réservation 12 peuvent communiquer entre eux au moyen d'un réseau de liaisons tubulaires disposées horizontalement au niveau de la zone de recépage. According to a variant, the different sleeves 22 of the reservation cage 12 can communicate with each other by means of a network of tubular connections arranged horizontally at the level of the coppicing zone.
Claims
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AU90752/98A AU9075298A (en) | 1997-08-12 | 1998-08-11 | Method and device for cutting down concrete wrought works |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR9710456A FR2767346A1 (en) | 1997-08-12 | 1997-08-12 | RECEPTION METHOD AND DEVICE FOR CONCRETE WORKPIECES |
| FR97/10456 | 1997-08-12 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO1999007947A1 true WO1999007947A1 (en) | 1999-02-18 |
Family
ID=9510362
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/FR1998/001791 Ceased WO1999007947A1 (en) | 1997-08-12 | 1998-08-11 | Method and device for cutting down concrete wrought works |
Country Status (3)
| Country | Link |
|---|---|
| AU (1) | AU9075298A (en) |
| FR (1) | FR2767346A1 (en) |
| WO (1) | WO1999007947A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109723219A (en) * | 2019-01-09 | 2019-05-07 | 武汉一冶建筑安装工程有限责任公司 | The method that high low grade mass concrete pours simultaneously |
| CN111809619A (en) * | 2020-08-21 | 2020-10-23 | 中冶建工集团有限公司 | Construction process for protecting wall of worker bored pile required to pass through waste tunnel |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2787131B1 (en) * | 1998-12-11 | 2001-03-16 | Dominique Fonfrede | RECEPTION DEVICE FOR CONCRETE STRUCTURES |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2031331A (en) * | 1978-09-14 | 1980-04-23 | Igeco Pontello Prefab | Method and apparatus for producing reinforced concrete panels |
| US4571124A (en) * | 1982-11-18 | 1986-02-18 | Sumitomo Cement Co., Ltd. | Method of forming cast-in-place concrete pile |
-
1997
- 1997-08-12 FR FR9710456A patent/FR2767346A1/en active Pending
-
1998
- 1998-08-11 AU AU90752/98A patent/AU9075298A/en not_active Abandoned
- 1998-08-11 WO PCT/FR1998/001791 patent/WO1999007947A1/en not_active Ceased
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2031331A (en) * | 1978-09-14 | 1980-04-23 | Igeco Pontello Prefab | Method and apparatus for producing reinforced concrete panels |
| US4571124A (en) * | 1982-11-18 | 1986-02-18 | Sumitomo Cement Co., Ltd. | Method of forming cast-in-place concrete pile |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109723219A (en) * | 2019-01-09 | 2019-05-07 | 武汉一冶建筑安装工程有限责任公司 | The method that high low grade mass concrete pours simultaneously |
| CN109723219B (en) * | 2019-01-09 | 2021-07-13 | 武汉一冶建筑安装工程有限责任公司 | Method for simultaneously pouring high-grade and low-grade large-volume concrete |
| CN111809619A (en) * | 2020-08-21 | 2020-10-23 | 中冶建工集团有限公司 | Construction process for protecting wall of worker bored pile required to pass through waste tunnel |
Also Published As
| Publication number | Publication date |
|---|---|
| FR2767346A1 (en) | 1999-02-19 |
| AU9075298A (en) | 1999-03-01 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP0935034B1 (en) | Method of manufacturing of an anchoring, anchoring piece and tensioning element for this purpose | |
| FR2593202A1 (en) | PROCESS FOR MANUFACTURING CONCRETE PRECONTRAINT CONCRETE PIEU | |
| EP3559364B1 (en) | Permanent concrete formwork and method for manufacturing metal-concrete composite structure using such formwork | |
| FR3109785A1 (en) | equipment for shoring prefabricated floors | |
| EP1881114A2 (en) | Method of manufacturing a filled individual construction element intended for a civil engineering structure | |
| FR2789711A1 (en) | Allocation case, and method, for inserting pipeline in slab of reinforced concrete has hollow body with top face sealed with cover, lateral side with aperture for protective barrel, and feet under box | |
| WO1999007947A1 (en) | Method and device for cutting down concrete wrought works | |
| WO2016162708A1 (en) | Adapter for the rapid and economical placement of reinforced concrete piles | |
| FR2789706A1 (en) | Propping method and reinforcing pillar for building swimming pool involves supple plate folded and secured with bolts and split tube to form formwork filled with concrete | |
| EP1147264B1 (en) | Cut-off device for concrete structures | |
| EP2900875B1 (en) | Method of making a foundation | |
| EP3320147B1 (en) | Method for constructing a foundation including a step of cutting-of | |
| JP6677564B2 (en) | Reinforced basket and connection method of reinforced basket | |
| EP0142528A1 (en) | Process and equipment for manufacturing in-situ concrete monolithic piles with non-uniform section. | |
| FR3001472A1 (en) | Method for implementing elongated carrier element in excavation in ground for construction of pillars of foundation, involves adjusting inclination of adjustable frame with respect to centering frame to obtain desired orientation | |
| EP2757200B1 (en) | Apparatus for extracting or recessing in the floor an object such as a pile or a tube and corresponding method | |
| FR2784412A1 (en) | Equipment for building demolition, comprises pulley blocks, anchoring devices and traction winches to pull the building down | |
| FR2585646A1 (en) | Device for holding a load with respect to the single surface on which it is placed, especially on a transport means | |
| EP0031600B1 (en) | Process for the construction of dwellings | |
| FR2825730A1 (en) | Construction procedure for retaining structure against existing supporting surface uses partition with fastenings forming back-filled space | |
| EP1466673B1 (en) | Method for decontaminating and demolishing cowpers | |
| FR2634804A1 (en) | Method of inserting a prefabricated post in a very deep bore and post for the use of this method. | |
| FR3115308A1 (en) | Method and device for fixing a metal corbel retaining a wall | |
| FR2827319A1 (en) | Construction procedure for cast concrete wall below ground level uses vertical tube as trench shutter, destroyed when wall section has set | |
| FR3069870A1 (en) | METHOD FOR MANUFACTURING A STRUCTURE ELEMENT |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| AK | Designated states |
Kind code of ref document: A1 Designated state(s): AL AM AT AU AZ BA BB BG BR BY CA CH CN CU CZ DE DK EE ES FI GB GE GH GM HR HU ID IL IS JP KE KG KP KR KZ LC LK LR LS LT LU LV MD MG MK MN MW MX NO NZ PL PT RO RU SD SE SG SI SK SL TJ TM TR TT UA UG US UZ VN YU ZW |
|
| AL | Designated countries for regional patents |
Kind code of ref document: A1 Designated state(s): GH GM KE LS MW SD SZ UG ZW AM AZ BY KG KZ MD RU TJ TM AT BE CH CY DE DK ES FI FR GB GR IE IT LU MC NL PT SE BF BJ CF CG CI CM GA GN GW ML MR NE SN TD TG |
|
| 121 | Ep: the epo has been informed by wipo that ep was designated in this application | ||
| DFPE | Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101) | ||
| NENP | Non-entry into the national phase |
Ref country code: KR |
|
| REG | Reference to national code |
Ref country code: DE Ref legal event code: 8642 |
|
| NENP | Non-entry into the national phase |
Ref country code: CA |
|
| 122 | Ep: pct application non-entry in european phase |