EP0462010B1 - ypparatus to facilitate extraction of a shuttering, and use in making a trench wall in the ground. - Google Patents

ypparatus to facilitate extraction of a shuttering, and use in making a trench wall in the ground. Download PDF

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Publication number
EP0462010B1
EP0462010B1 EP91401571A EP91401571A EP0462010B1 EP 0462010 B1 EP0462010 B1 EP 0462010B1 EP 91401571 A EP91401571 A EP 91401571A EP 91401571 A EP91401571 A EP 91401571A EP 0462010 B1 EP0462010 B1 EP 0462010B1
Authority
EP
European Patent Office
Prior art keywords
shuttering
groove
tool
face
formwork
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP91401571A
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German (de)
French (fr)
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EP0462010A1 (en
Inventor
Pierre Longchamp
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Bouygues SA
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Bouygues SA
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Filing date
Publication date
Priority claimed from FR9007502A external-priority patent/FR2663357B1/en
Priority claimed from FR9103953A external-priority patent/FR2674888B1/en
Application filed by Bouygues SA filed Critical Bouygues SA
Publication of EP0462010A1 publication Critical patent/EP0462010A1/en
Application granted granted Critical
Publication of EP0462010B1 publication Critical patent/EP0462010B1/en
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    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
    • E02D5/18—Bulkheads or similar walls made solely of concrete in situ
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
    • E02D5/18—Bulkheads or similar walls made solely of concrete in situ
    • E02D5/182—Bulkheads or similar walls made solely of concrete in situ using formworks to separate sections
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
    • E02D5/18—Bulkheads or similar walls made solely of concrete in situ
    • E02D5/185—Bulkheads or similar walls made solely of concrete in situ with flexible joint members between sections
    • 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

Definitions

  • the invention relates to a device for facilitating the extraction of a vertical formwork which has been used for the production of a concrete wall, said formwork constituting a box having a formwork face facing the molded wall, a back opposite to the formwork face and two lateral sides.
  • Publication CH-A-665 241 recommends for this purpose a device which comprises in the back of the formwork a vertical guide groove open over its entire length in a direction opposite to the formwork face and formwork means movable vertically and guided by said groove.
  • This device is intended to be used in the case where the formwork consists of several superimposable separable elements and where the formwork is arranged between two guide walls.
  • the tool has in its middle a T-shaped section 11 whose head is capable of sliding vertically in the groove 7 of the formwork while being retained in this groove.
  • the groove may be temporarily filled with a protective element or material during concreting to avoid any introduction of the concrete into the groove.

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  • Engineering & Computer Science (AREA)
  • Structural Engineering (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)
  • Forms Removed On Construction Sites Or Auxiliary Members Thereof (AREA)
  • Moulds, Cores, Or Mandrels (AREA)

Abstract

The invention relates to a device for making it easier to extract a vertical shuttering. This apparatus comprises means for forming removably in the back (1b) of the shuttering (1) at least one vertical guide groove (8) open over its entire length in a direction opposite to the shuttering face (1a), and means forming a shuttering-removing tool having a guide part (11) capable of sliding vertically in said groove, whilst being retained in the groove, and lateral knives (9, 10) capable of scraping the lateral sides (3, 4) of the shuttering during sliding, the apparatus comprising means (12) for controlling the sliding of said tool. The invention is used particularly for the shutterings serving for making a trench wall in the ground. <IMAGE>

Description

l'invention concerne un dispositif pour faciliter l'extraction d'un coffrage vertical ayant servi à la réalisation d'une paroi en béton, ledit coffrage constituant un caisson présentant une face coffrante tournée vers la paroi moulée, un dos opposé à la face coffrante et deux côtés latéraux.the invention relates to a device for facilitating the extraction of a vertical formwork which has been used for the production of a concrete wall, said formwork constituting a box having a formwork face facing the molded wall, a back opposite to the formwork face and two lateral sides.

Elle s'applique en particulier à la réalisation d'une paroi moulée en béton armé dans le sol et sera décrite en référence à cette application.It applies in particular to the production of a reinforced concrete diaphragm wall in the ground and will be described with reference to this application.

On connaît diverses réalisations d'un tel coffrage pour la réalisation d'une paroi moulée dans le sol, comme décrites par exemple dans la publication CH-A-665241 et la publication EP-A-0 101 350.Various embodiments of such formwork are known for producing a wall molded into the ground, as described for example in publication CH-A-665241 and publication EP-A-0 101 350.

La réalisation d'une paroi en béton armé dans le sol au moyen de tels coffrages consiste à creuser une fouille verticale, à insérer le coffrage aux extrémités de la fouille, à introduire dans la fouille les armatures de la paroi et à couler le béton dans la fouille, ces opérations étant répétées dans des fouilles jointives successives jusqu'à réaliser la paroi désirée, par exemple une paroi cylindrique.The realization of a reinforced concrete wall in the ground by means of such formwork consists in digging a vertical excavation, inserting the formwork at the ends of the excavation, introducing in the excavation the reinforcements of the wall and pouring the concrete in the excavation, these operations being repeated in successive contiguous excavations until the desired wall is produced, for example a cylindrical wall.

Pour passer d'une fouille à la suivante, il est nécessaire d'extraire les coffrages qui ont été utilisés dans la première fouille pour le réutiliser dans la première fouille suivante et cette opération d'extraction est souvent difficile, lorsque le béton a fait prise, en sorte que l'on ne peut pas différer cette extraction comme on le voudrait souvent pour éviter de maintenir sur le chantier des équipes de nuit.To go from one excavation to the next, it is necessary to extract the forms that were used in the first excavation to reuse it in the first subsequent excavation and this extraction operation is often difficult, when the concrete has set , so that we cannot postpone this extraction as we would often like to avoid keeping night teams on site.

La publication CH-A-665 241 préconise à cette fin un dispositif qui comporte dans le dos du coffrage une gorge de guidage verticale ouverte sur toute sa longueur dans une direction à l'opposé de la face coffrante et des moyens de décoffrage déplaçables verticalement et guidés par ladite gorge. Ce dispositif est destiné à être utilisé dans le cas où le coffrage est constitué de plusieurs éléments séparables superposés et où le coffrage est disposé entre deux murets de guidage.Publication CH-A-665 241 recommends for this purpose a device which comprises in the back of the formwork a vertical guide groove open over its entire length in a direction opposite to the formwork face and formwork means movable vertically and guided by said groove. This device is intended to be used in the case where the formwork consists of several superimposable separable elements and where the formwork is arranged between two guide walls.

La présente invention vise à faciliter cette extraction.The present invention aims to facilitate this extraction.

On y parvient, selon l'invention, au moyen d'un dispositif tel que défini dans la revendication 1, dans laquelle les caractéristiques en préambule sont connues du document CH-A-665241 précité. L'invention a en outre pour objet l'application d'un tel dispositif, cf. revendication 12.This is achieved, according to the invention, by means of a device as defined in claim 1, in which the characteristics in the preamble are known from the aforementioned document CH-A-665241. The invention further relates to the application of such a device, cf. claim 12.

On décrira ci-après des exemples de réalisation d'un tel dispositif, en référence aux figures du dessin joint, la description et les figures faisant apparaître d'autres particularités de la présente invention.Examples of embodiment of such a device will be described below, with reference to the figures in the accompanying drawing, the description and the figures showing other particular features of the present invention.

Sur les figures :

  • la figure 1 est un schéma du coffrage et du dispositif de l'invention en coupe horizontale ;
  • la figure 2 est un schéma en vue de dessus de deux fouilles jointives successives ;
  • la figure 3 est un schéma des deux fouilles en coupe verticale,
  • la figure 4 est un schéma illustrant l'utilisation de la benne d'excavation pour exercer une traction sur le coffrage ;
  • la figure 5 est une coupe schématique horizontale du caisson de coffrage, relative à un détail de réalisation ;
  • la figure 6 est une coupe schématique verticale locale de l'outil de décoffrage relative à un détail de réalisation ;
  • les figures 7 et 8 sont des coupes horizontales schématiques à deux niveaux A (figure 7) et B (figure 8) de la figure 6, et
  • la figure 9 est une coupe horizontale schématique du dispositif montrant un détail de réalisation.
In the figures:
  • Figure 1 is a diagram of the formwork and the device of the invention in horizontal section;
  • Figure 2 is a diagram from above of two successive excavations;
  • FIG. 3 is a diagram of the two excavations in vertical section,
  • Figure 4 is a diagram illustrating the use of the excavation bucket to exert traction on the formwork;
  • Figure 5 is a schematic horizontal section of the formwork box, relating to an embodiment detail;
  • Figure 6 is a local vertical schematic section of the formwork tool relating to an embodiment detail;
  • FIGS. 7 and 8 are schematic horizontal sections on two levels A (FIG. 7) and B (FIG. 8) of FIG. 6, and
  • Figure 9 is a schematic horizontal section of the device showing a detail of embodiment.

On a représenté sur la figure 1, en coupe horizontale, le coffrage caisson constitué d'un corps principal 1 formant caisson et qui présente une face coffrante verticale la pourvue en son milieu d'un joint 2 de façon en soi connue, un dos 1b opposé à la face coffrante et deux côtés latéraux 3,4 verticaux et légèrement inclinés pour faciliter le décoffrage ultérieur.Is shown in Figure 1, in horizontal section, the box formwork consisting of a main body 1 forming a box and which has a vertical formwork face provided in the middle with a seal 2 in a manner known per se, a back 1b opposite the formwork face and two lateral sides 3,4 vertical and slightly inclined to facilitate subsequent formwork.

Selon l'invention, deux plaques 5,6 sont fixées de façon démontable sur le dos du coffrage, par exemple par boulonnage, pour constituer entre elles l'ouverture 7' d'une gorge verticale 7.According to the invention, two plates 5,6 are detachably fixed on the back of the formwork, for example by bolting, to form between them the opening 7 'of a vertical groove 7.

On voit également sur la figure 1, en coupe horizontale, l'outil de décoffrage constitué d'une plaque épaisse 8 munie de deux rebords latéraux 9,10 en forme de plaques aptes à constituer des couteaux, la distance des rebords étant choisie en correspondance de la largeur du coffrage pour que les couteaux puissent râcler les côtés du coffrage verticalement.We also see in Figure 1, in horizontal section, the formwork tool consisting of a thick plate 8 provided with two side edges 9,10 in the form of plates capable of forming knives, the distance from the edges being chosen in correspondence the width of the formwork so that the knives can scrape the sides of the formwork vertically.

L'outil présente en son milieu une partie 11 profilée en forme de T dont la tête est apte à coulisser verticalement dans la gorge 7 du coffrage tout en étant retenue dans cette gorge.The tool has in its middle a T-shaped section 11 whose head is capable of sliding vertically in the groove 7 of the formwork while being retained in this groove.

L'outil est apte à être fixé à un moyen de commande capable de commander le déplacement vertical de l'outil, par exemple à la benne d'excavation utilisée pour réaliser la fouille.The tool is able to be fixed to a control means capable of controlling the vertical movement of the tool, for example to the excavation bucket used to carry out the excavation.

Sur la figure 1, on a schématisé cette benne en 12 et l'on a représenté le coffrage, l'outil et la benne à distance les uns des autres, pour la clarté de la figure, mais on comprendra qu'en service, l'outil est accolé à la benne à laquelle il est provisoirement fixé par tout moyen quelconque approprié (par exemple par clavetage dans des anneaux fixés à là benne) et, au moment voulu, est engagé pour que sa partie 11 coulisse dans la gorge 7 tandis que les couteaux 9,10 râclent les côtés 3,4 du coffrage.In FIG. 1, this bucket has been shown diagrammatically at 12 and the formwork, the tool and the bucket are shown at a distance from each other, for the clarity of the figure, but it will be understood that in service, the tool is attached to the bucket to which it is provisionally fixed by any suitable means (for example by keying in rings attached to the bucket) and, at the desired time, is engaged so that its part 11 slides in the groove 7 while that the knives 9,10 scrape the sides 3,4 of the formwork.

Les figures 2 et 3 illustrent la suite des opérations : après avoir réalisé une première fouille A, on met en place le coffrage 1 (dont la hauteur est de préférence supérieure à la profondeur de la fouille) et les armatures éventuelles de la paroi à construire puis on coule le béton dans la fouille. Si nécessaire, la fouille est consolidée provisoirement avec de la bentonite ou équivalent, avant le coulage.Figures 2 and 3 illustrate the following operations: after having carried out a first excavation A, the formwork 1 is put in place (the height of which is preferably greater than the depth of the excavation) and the possible reinforcements of the wall to be constructed then pour the concrete into the excavation. If necessary, the excavation is temporarily consolidated with bentonite or equivalent, before pouring.

On réalise ensuite, à tout moment voulu, la fouille suivante B en descendant la benne d'excavation 12 à laquelle, si nécessaire, on a fixé l'outil de décoffrage 8-11, dont la partie de guidage 11 a été engagée par le haut dans la gorge dorsale du coffrage. Les couteaux de l'outil brisent le béton de la fouille A qui a éventuellement contourné le coffrage et qui bloque le coffrage tandis que le guide 11 retenu dans la gorge 7 maintient l'outil contre le coffrage. Si la gorge vient à être obstruée par le béton, le démontage des plaques 5,6 donne accès à la gorge pour son nettoyage.Then, at any desired time, the next excavation B is carried out by lowering the excavating bucket 12 to which, if necessary, the formwork tool 8-11 has been fixed, the guide part 11 of which has been engaged by the high in the dorsal groove of the formwork. The knives of the tool break the concrete of the excavation A which has possibly bypassed the formwork and which blocks the formwork while the guide 11 retained in the groove 7 holds the tool against the formwork. If the groove becomes obstructed by concrete, dismantling the plates 5,6 gives access to the groove for cleaning.

Eventuellement, la gorge peut être provisoirement remplie par un élément ou matériau protecteur pendant le bétonnage pour éviter toute introduction du béton dans la gorge.Optionally, the groove may be temporarily filled with a protective element or material during concreting to avoid any introduction of the concrete into the groove.

Le décoffrage peut être facilité en exerçant une traction vers le vide créé par le forage en cours. Dans ce cas, le décoffrage se fait en partant du pied et en remontant.The formwork can be facilitated by exerting traction towards the vacuum created by the drilling in progress. In this case, the formwork is done starting from the foot and going up.

La traction peut être exercée par une légère fermeture de la benne par exemple. Pour ce faire, une partie ou téton 13 similaire au téton de guidage 11 de l'outil peut être fixée sur une coquille de la benne 12 et introduite dans la rainure centrale 7 du coffrage (figure 4).Traction can be exerted by a slight closing of the bucket for example. To do this, a part or stud 13 similar to the guide stud 11 of the tool can be fixed to a shell of the bucket 12 and introduced into the central groove 7 of the formwork (FIG. 4).

La benne prend appui par le sommet du chapeau sur le coffrage et agit comme un levier.The bucket is supported by the top of the hat on the formwork and acts as a lever.

L'invention n'est pas limitée à un nombre ni à un profil particulier de gorge telle que 8 et de guide tel que 11.The invention is not limited to a number or to a particular groove profile such as 8 and of a guide such as 11.

L'invention n'est pas limitée au dispositif particulier qui a été décrit en référence aux figures 1 à 4.The invention is not limited to the particular device which has been described with reference to FIGS. 1 to 4.

Ainsi, dans des variantes de réalisation représentées de façon schématique sur les figures 5 à 9, le dispositif présente encore une ou plusieurs des caractéristiques suivantes :

  • un tube 14 est introduit temporairement dans la gorge 7 du caisson de coffrage 1 (figure 5). Ce tube a des dimensions choisies pour remplir la gorge et éviter l'encrassement de la gorge au cours du creusement du forage et il est réalisé dans un matériau tel que l'outil de décoffrage (8-11) puisse facilement découper progressivement le tube, au fur et à mesure de sa progression. Le tube est par exemple en polychlorure de vinyle,
  • l'outil de décoffrage (8-11) comporte sous le téton 11 un doigt 15 (figures 6-8), par exemple en forme de couteau, apte à pénétrer dans l'ouverture 7' de la gorge 7 (sans y être prisonnier) pour guider longitudinalement l'outil et découper le tube 14,
  • l'outil de décoffrage (8-11) comporte, de part et d'autre du téton, à toute hauteur désirée, des roulettes 16 (figure 9) aptes à rouler contre la face en regard du caisson de coffrage pour maintenir l'outil à distance contrôlée de cette face, ce qui est utile notamment quand l'outil est du type fraise,
  • la face plane du coffrage est revêtue d'une protection constituée d'un revêtement non ferreux (17), par exemple en matière plastique, pour éviter un contact direct entre l'outil de creusement et le métal du coffrage.
Thus, in alternative embodiments shown diagrammatically in FIGS. 5 to 9, the device also has one or more of the following characteristics:
  • a tube 14 is temporarily introduced into the groove 7 of the formwork box 1 (FIG. 5). This tube has dimensions chosen to fill the groove and prevent fouling of the groove during the digging of the borehole and it is made of a material such that the formwork removal tool (8-11) can easily cut the tube gradually, as it progresses. The tube is for example made of polyvinyl chloride,
  • the stripping tool (8-11) has a finger 15 under the stud 11 (FIGS. 6-8), for example in the form of a knife, capable of penetrating into the opening 7 'of the groove 7 (without being trapped therein) ) to guide the tool longitudinally and cut the tube 14,
  • the formwork tool (8-11) comprises, on either side of the stud, at any desired height, rollers 16 (FIG. 9) able to roll against the opposite face of the formwork box to hold the tool remotely controlled from this face, which is useful especially when the tool is of the cutter type,
  • the flat face of the formwork is coated with a protection consisting of a non-ferrous coating (17), for example made of plastic, to avoid direct contact between the digging tool and the metal of the formwork.

Claims (13)

  1. Apparatus for facilitating extraction of vertical shuttering that has been used for making a concrete wall, the shuttering constituting a box having a shuttering face facing towards the cast wall, a back opposite from the shuttering face, and two lateral sides, the apparatus comprising both the shuttering (1) including in the back (1b) of said shuttering at least one vertical guide groove (7) that is open over its entire length in a direction that faces away from the shuttering face (1a), and de-shuttering means that are vertically displaceable and guided by said groove, the apparatus being characterized in that the de-shuttering means are constituted by a tool having a guide portion (11) suitable for sliding vertically in said groove while being held captive in the groove, and lateral blades (9, 10) suitable for scraping the lateral sides (3, 4) of the shuttering during such sliding, and in that the apparatus includes dismountable means (5, 6) for constituting said groove (7) in the back of the shuttering, and control means (12) for controlling the sliding of said tool.
  2. Apparatus according to claim 1, characterized in that said guide portion (1) of the de-shuttering tool is a bar whose right cross-section is T-shaped.
  3. Apparatus according to claim 1 or 2, characterized in that the two lateral blades (9, 10) of said de-shuttering tool are plane walls.
  4. Apparatus according to claim 3, characterized in that said plane walls are connected to a transverse wall (8) provided in its middle with said guide portion (11).
  5. Apparatus according to any one of claims 1 to 4, characterized in that the means for constituting said groove comprise two dismountable plates (5, 6) fixed facing each other in a common plane on the back of the shuttering to constitute between them the opening (7') of said groove (7).
  6. Apparatus according to any one of claims 1 to 5, characterized in that the control means include a portion (13) suitable for being inserted in said groove (7).
  7. Apparatus according to any one of claims 1 to 6, characterized in that said vertical guide groove (7) of the shuttering is temporarily filled with a tube (14) suitable for being cut by the de-shuttering tool (8-11).
  8. Apparatus according any one of claims 1 to 7, characterized in that said de-shuttering tool (8-11) includes a finger (15) beneath said guide portion (11) and suitable for being inserted into the opening (7') of the groove (7) in the shuttering without being held captive in the groove.
  9. Apparatus according to claims 7 and 8, characterized in that said finger (15) is in the form of a knife for cutting said tube (14).
  10. Apparatus according to any one of claims 1 to 9, characterized in that the de-shuttering tool (8-11) comprises, on either side of said guide portion (11), and at any desired height, small wheels (16) suitable for running over the facing face of the shuttering.
  11. Apparatus according to any one of claims 1 to 10, characterized in that the face of the shuttering that faces the de-shuttering tool (8-11) includes a non-ferrous covering.
  12. The use of apparatus according to any one of claims 1 to 11 in the making of a wall that is cast in the ground.
  13. A use according to claim 12, characterized in that said control means are an excavation bucket (12) or a milling cutter to which said tool is fixed in temporary manner.
EP91401571A 1990-06-15 1991-06-13 ypparatus to facilitate extraction of a shuttering, and use in making a trench wall in the ground. Expired - Lifetime EP0462010B1 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
FR9007502A FR2663357B1 (en) 1990-06-15 1990-06-15 DEVICE FOR FACILITATING THE EXTRACTION OF A FORMWORK, TOOL PRESENT IN THE DEVICE AND APPLICATION TO THE PRODUCTION OF A MOLDED WALL IN THE GROUND.
FR9007502 1990-06-15
FR9103953 1991-04-02
FR9103953A FR2674888B1 (en) 1991-04-02 1991-04-02 DEVICE FOR FACILITATING THE EXTRACTION OF A FORMWORK, TOOL PRESENT IN THE DEVICE AND APPLICATION TO THE PRODUCTION OF A MOLDED WALL IN THE GROUND.

Publications (2)

Publication Number Publication Date
EP0462010A1 EP0462010A1 (en) 1991-12-18
EP0462010B1 true EP0462010B1 (en) 1995-03-01

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Application Number Title Priority Date Filing Date
EP91401571A Expired - Lifetime EP0462010B1 (en) 1990-06-15 1991-06-13 ypparatus to facilitate extraction of a shuttering, and use in making a trench wall in the ground.

Country Status (5)

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EP (1) EP0462010B1 (en)
AT (1) ATE119228T1 (en)
DE (1) DE69107696T2 (en)
ES (1) ES2070454T3 (en)
HK (1) HK101596A (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB9616040D0 (en) * 1996-07-31 1996-09-11 Tsw Partnership The Improved stop-end system for use in diaphragm wall construction
FR2791072B1 (en) 1999-03-19 2001-06-15 Cie Du Sol DEVICE FOR AIDING FORMWORK

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL113163C (en) * 1900-01-01
US3513572A (en) * 1967-09-01 1970-05-26 Stang Cofor Inc Excavating apparatus for digging trenches
DE3035369C2 (en) * 1980-09-19 1983-05-26 Robert Ing.(grad.) 8011 Oberpframmern Pföderl Method and formwork element for producing diaphragm walls
FR2531733A1 (en) * 1982-08-11 1984-02-17 Sif Entreprise Bachy METHOD AND DEVICE FOR EXTRACTING A FORMWORK IN THE CONTEXT OF PRODUCING A MOLDED WALL IN THE GROUND
CH665241A5 (en) * 1987-01-28 1988-04-29 Zschokke Sa Conrad Wall-casting system in ground - uses end shuttering walls in sections aligned and clamped together beforehand

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Publication number Publication date
DE69107696T2 (en) 1995-06-29
ES2070454T3 (en) 1995-06-01
EP0462010A1 (en) 1991-12-18
ATE119228T1 (en) 1995-03-15
DE69107696D1 (en) 1995-04-06
HK101596A (en) 1996-06-21

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