EP0496719A1 - Schalungselement für Beton - Google Patents

Schalungselement für Beton Download PDF

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Publication number
EP0496719A1
EP0496719A1 EP92870012A EP92870012A EP0496719A1 EP 0496719 A1 EP0496719 A1 EP 0496719A1 EP 92870012 A EP92870012 A EP 92870012A EP 92870012 A EP92870012 A EP 92870012A EP 0496719 A1 EP0496719 A1 EP 0496719A1
Authority
EP
European Patent Office
Prior art keywords
formwork
partition
elongated
cast panel
formwork element
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.)
Withdrawn
Application number
EP92870012A
Other languages
English (en)
French (fr)
Inventor
Stephen Carde
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.)
Compagnie Internationale Des Wagons Lits et Du Tourisme SA
Original Assignee
Compagnie Internationale Des Wagons Lits et Du Tourisme SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Compagnie Internationale Des Wagons Lits et Du Tourisme SA filed Critical Compagnie Internationale Des Wagons Lits et Du Tourisme SA
Publication of EP0496719A1 publication Critical patent/EP0496719A1/de
Withdrawn legal-status Critical Current

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Classifications

    • 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
    • E02D9/00—Removing sheet piles bulkheads, piles, mould-pipes or other moulds or parts thereof

Definitions

  • the present invention relates to formwork elements and a method for detaching such formwork elements from a cast or molded wall.
  • the formwork or mold When a wall or panel is cast or molded, the formwork or mold is usually removed from the casting section, and used to pour other sections or panels. In some cases, the formwork can simply be destroyed and a new formwork used to pour other sections or wall panels. In other cases, the formwork is designed to be dismantled from the section or wall panel cast and reused.
  • part of the formwork includes a trench or excavation in the ground having the desired depth and width.
  • the ends of the wall sections or panels are determined either by the ends of the trench or by a suitable formwork, usually an elongated panel, known in the art as a formwork element or end forming a stopper, placed vertically in the trench, the width of the element being substantially equal to the width of the trench.
  • a curable material is then poured into the trench on one side of the formwork element.
  • the curable material is prevented from flowing along the entire trench by the formwork member.
  • a panel or wall section of the desired length is poured or molded into the ground.
  • the formwork element is detached from the panel and moved along the trench. The process is then repeated to form other panels until the membrane wall is completed along its entire length.
  • One of these formwork elements includes a series of inflatable ribs positioned between the formwork element and the wall section. After the cast panel has hardened, the inflatable ribs are pressurized to facilitate removal by traction of the formwork member from the cast panel.
  • Such a formwork element is however extremely complicated and liable to be damaged when it is removed from a cast panel and put in place to form another panel.
  • Another prior method for removing a formwork element from a cast panel involves a formwork element which extends a certain distance above the upper level of the trench.
  • a weighted instrument is then placed on the formwork element and dropped to smash the hardenable material directly adjacent to the formwork element, thereby breaking the joint between the formwork element and the cast panel.
  • Such a weighted instrument may optionally include a wedge shape such that, when it advances down the length of the formwork member by breaking the curable material, it simultaneously forces the formwork member to depart from the section of wall.
  • the present invention includes a formwork member for forming a cast panel, said member comprising an elongated partition member, and an elongated plate connected to one side of said partition member in a substantially parallel spaced configuration such that said rib elongated can be gripped by a disassembly means to detach said element from said cast panel.
  • said elongated plate extends along the length of said elongated partition-forming element.
  • said shuttering element comprises a projection on the other side of said partition means for configuring an end face of said cast panel.
  • said means protruding comprises a C-shaped gutter element which is connected along its longitudinal edges to said elongated partition element.
  • said formwork element comprises a positioning means forming a water barrier intended to receive a water barrier so that, after the disassembly of said element from said cast panel, said water barrier is at least partially embedded in said cast panel.
  • said elongated plate is narrower than said elongated partition-forming element.
  • the present invention comprises a method for removing a formwork element from a cast panel, said formwork element comprising an elongated partition element, and an elongated plate connected to one side of said partition element, in a spaced configuration. substantially parallel, said method comprising engaging said elongated plate with a disassembly means and removing by pulling said element from said cast panel so that said disassembly means does not come into contact with said cast panel.
  • said disassembly means comprises two grooves facing inwards intended to receive the longitudinal edges of said elongated plate and to slide thereon.
  • said disassembly means is fixed to an excavating bucket.
  • the formwork element of the present invention is disassembled by traction on the elongated plate which is fixed to the elongated partition element, the partition element is not liable to be damaged by the disassembly means and the The formwork element can therefore be reused without the need to repair the partition element.
  • the elongated plate reinforces the bulkhead member against bending or bending which may be due to the pressure exerted on the member by the hardenable material in the trench or may occur during disassembly of the cast panel member. .
  • the elongated plate also guides the excavating bucket during subsequent trenches, thus ensuring geometric continuity of the membrane wall.
  • Figure 1 is a cross-sectional view of the concrete formwork element according to a first embodiment.
  • Figure 2 is a side view of the formwork element of Figure 1 which is disassembled from a wall section.
  • FIG. 3 is a cross-sectional view along the line A-A of FIG. 2, and
  • Figure 4 is a cross-sectional view of a formwork element according to a second embodiment realization of the present invention.
  • Figure 1 shows the cross section of a formwork element 10 according to a first embodiment of the present invention.
  • the formwork element 10 comprises an elongated partition-forming element 11, and an elongated plate 13 connected to one side of said partition in a substantially parallel spaced configuration.
  • the elongated plate 13 is connected to the partition 11 and separated from the latter by means of spacers 14 and 15.
  • a projection 12 can optionally be connected to the other side of the elongated element forming the partition.
  • a bucket or excavator bucket 30 digs a trench 31.
  • the stability of the dug trench can be ensured by filling the trench with bentonite mud thereby preventing subsidence of the trench.
  • the formwork element 10 is placed vertically in the trench, as shown.
  • the elongated partition-forming element 11 extends substantially over the entire width of the dug trench.
  • the material intended to form the cast panel 20 is then poured into the excavation on the side of the partition 11 provided with the projection 12 while the optional bentonite mud is removed.
  • the projection 12 conforms to the end face of the casting panel 20.
  • the projection 12 is a C-shaped gutter element which produces a notch in the end face of the casting panel to reduce lateral movement between adjacent cast panels.
  • the cast panel will be formed by a hardenable material such as concrete or cement.
  • the cast panel does not have a supporting function, it can be filled with any material such as a grout, a mixture of cement and bentonite which does not fully cure and which makes a wall impermeable to the water.
  • a wall is particularly suitable for stabilizing the surface of the groundwater table during excavation.
  • the formwork element 10 can be removed from the end panel 20 and placed further along the excavation. The area of the excavation between the formwork element 10 and the end of the cast panel is then filled again with material to form another panel. This "consecutive" method is repeated until the desired length of the wall is completed.
  • Another method of forming such a length of wall is to dig a series of trenches spaced from each other and to fill these trenches with a material to form the cast panel. When these first cast panels have substantially hardened, the area between these cast panels is then hollowed out and filled with material to form the completed wall section.
  • the advantage of such an "alternative" process is that the operator does not need to wait until each cast panel has sufficiently hardened before forming another cast panel since the cast panels of a series spaced apart others are all trained at the same time.
  • the elongated plate 13 is gripped by a disassembly means and removed by pulling from the end of the cast panel 20. In this way, the disassembly means is never in contact with the cast panel. In addition, since the dismantling means do not grip the elongated partition 11, the partition keeps its shape when it is dismantled from the cast panel, thereby preventing any possible leakage of the material from the cast panel along the elongate partition 11, during the subsequent formation of other panels.
  • Another advantage of the present invention lies in the reinforcement given to the assembly of the formwork element 10 by an elongated plate 13.
  • the elongated plate 13 can extend along the entire length of the elongated partition 11 thereby reducing the possibility of the elongated partition 11 to flex or bend due to the forces exerted on it by the material forming the cast panel or by the continuous disassembly of the element 10 of the cast panel.
  • the formwork element 10 is disassembled by a disassembly means 32 which comprises a pair of grooves 21 and 22 oriented inwards 21 and 22 intended to surround the longitudinal edges of the elongated plate 13 and to slide thereon.
  • the disassembly means 32 is fixed to the clamshell bucket 30.
  • the clamshell bucket 30 is first positioned above the concrete formwork element 10. The clamshell bucket 30 is then lowered so that the longitudinal edges of the elongated plate 13 are received in the inwardly directed grooves 21 and 22.
  • the clamshell 30 is then simply removed from the panel cast by the cable 34 by removing the formwork element 10 from the cast panel. It should be noted that neither the dismantling means 32 nor the clamshell 30 come into contact with the cast panel 20, at any time, during the disassembly of the formwork element 10 from the cast panel 20.
  • Another advantage resulting from the present invention is the use of the elongated partition 13 to guide the clamshell 30 by making an excavation for the next cast panel of the wall section. It will be clear to those skilled in the art that, if the elongated plate 13 is symmetrical about the central axis of the trench, when the clamshell 30 is slidably connected to the elongated plate 13 by the disassembly means 32, any excavation by the clamshell bucket 30 will be aligned with the cast panel 20 formed previously, thus ensuring continuity geometric of the wall section.
  • FIGS. 2 and 3 represents a disassembly means 32 which is fixed to the clamshell bucket 30, it is envisaged that any means which positions the disassembly means 32 on the elongated plate 13 and which can remove the disassembly means 32 from the end of the cast panel 20, can be used to disassemble the formwork element 10 from the wall section 20.
  • the elongated plate 13 it is preferable for the elongated plate 13 to be narrower than the elongated partition 11, thus allowing the disassembly means 32 to slide on the formwork element 10 without the disassembly means 32 coming into contact with the sides of the trench 31.
  • FIG 4 is a cross-sectional view of a formwork element according to the second embodiment of the present invention.
  • the formwork element 10 once again comprises an elongated partition 11, a projection 12 and an elongated plate 13 connected to the elongated partition 11 in a spaced apart configuration substantially parallel by the spacers 14 and 15.
  • This second embodiment however includes a positioning device forming a water barrier 16 on the projection 12.
  • the positioning device forming a water barrier 16 is provided with a groove 17 which, in this case, tapers slightly inwards. .
  • a water barrier which comprises a strip of elastic material is placed in the groove means 17 before the formwork element 10 is placed in the dug trench. Gradually as the panel material is poured into the trench, it will surround the water barrier and when this material hardens and the formwork element 10 is removed from the cast panel 20, the water barrier, which is embedded in the cast panel 20, is withdrawn from the groove 17. In this way, a water barrier can be positioned at the end of each cast panel 20 simultaneously when the formwork element 10 is dismantled from the wall section 20.

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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)
  • Moulds, Cores, Or Mandrels (AREA)
  • Forms Removed On Construction Sites Or Auxiliary Members Thereof (AREA)
EP92870012A 1991-01-22 1992-01-17 Schalungselement für Beton Withdrawn EP0496719A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AU69906/91A AU623298B1 (en) 1991-01-22 1991-01-22 Concrete shuttering element
AU69906/91 1991-01-22

Publications (1)

Publication Number Publication Date
EP0496719A1 true EP0496719A1 (de) 1992-07-29

Family

ID=3753295

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92870012A Withdrawn EP0496719A1 (de) 1991-01-22 1992-01-17 Schalungselement für Beton

Country Status (3)

Country Link
EP (1) EP0496719A1 (de)
AU (2) AU6990691A (de)
MY (1) MY107904A (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998004782A1 (en) * 1996-07-31 1998-02-05 Gammon Finance Ltd. - Kvaerner Construction International Ltd. Improved stop-end system for use in diaphragm wall construction

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2473091A1 (fr) * 1980-01-08 1981-07-10 Sif Entreprise Bachy Dispositif de coffrage autodecoffrant utile pour la realisation d'une paroi moulee dans le sol
EP0101350A1 (de) * 1982-08-11 1984-02-22 Sondages Injections Forages "S.I.F." Entreprise Bachy Verfahren und Vorrichtung zum Ausziehen der Schalung bei der Herstellung einer unterirdischen Schlitzwand
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
EP0333577A1 (de) * 1988-03-18 1989-09-20 Sondages Injections Forages "S.I.F." Entreprise Bachy Führungssystem eines Arbeitsgerätes und Verfahren zum Herstellen einer im Boden gegossenen Wand
EP0402247B1 (de) * 1989-06-06 1992-12-09 Soletanche Verfahren und Vorrichtung zum Ablösen einer am Beton haftenden Dichtung eines im Boden gegossenen Wandabschnittes

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2473091A1 (fr) * 1980-01-08 1981-07-10 Sif Entreprise Bachy Dispositif de coffrage autodecoffrant utile pour la realisation d'une paroi moulee dans le sol
EP0101350A1 (de) * 1982-08-11 1984-02-22 Sondages Injections Forages "S.I.F." Entreprise Bachy Verfahren und Vorrichtung zum Ausziehen der Schalung bei der Herstellung einer unterirdischen Schlitzwand
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
EP0333577A1 (de) * 1988-03-18 1989-09-20 Sondages Injections Forages "S.I.F." Entreprise Bachy Führungssystem eines Arbeitsgerätes und Verfahren zum Herstellen einer im Boden gegossenen Wand
EP0402247B1 (de) * 1989-06-06 1992-12-09 Soletanche Verfahren und Vorrichtung zum Ablösen einer am Beton haftenden Dichtung eines im Boden gegossenen Wandabschnittes

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998004782A1 (en) * 1996-07-31 1998-02-05 Gammon Finance Ltd. - Kvaerner Construction International Ltd. Improved stop-end system for use in diaphragm wall construction
GB2315803A (en) * 1996-07-31 1998-02-11 Gammon Finance Ltd Stop - end removal system for use in diaphragm wall construction
GB2315803B (en) * 1996-07-31 1998-09-30 Gammon Finance Ltd Improved stop-end system for use in diaphragm wall construction

Also Published As

Publication number Publication date
AU623298B1 (en) 1992-05-07
MY107904A (en) 1996-06-29
AU6990691A (en) 1992-05-07

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