EP0673341B1 - Twin slab - Google Patents

Twin slab Download PDF

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Publication number
EP0673341B1
EP0673341B1 EP94902779A EP94902779A EP0673341B1 EP 0673341 B1 EP0673341 B1 EP 0673341B1 EP 94902779 A EP94902779 A EP 94902779A EP 94902779 A EP94902779 A EP 94902779A EP 0673341 B1 EP0673341 B1 EP 0673341B1
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EP
European Patent Office
Prior art keywords
plate
twin
plates
knobs
anchoring
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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
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EP94902779A
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German (de)
French (fr)
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EP0673341A1 (en
Inventor
Ernst Rohringer
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Steuler Industriewerke GmbH
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Steuler Industriewerke GmbH
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Priority claimed from DE4242834A external-priority patent/DE4242834A1/en
Application filed by Steuler Industriewerke GmbH filed Critical Steuler Industriewerke GmbH
Publication of EP0673341A1 publication Critical patent/EP0673341A1/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D90/00—Component parts, details or accessories for large containers
    • B65D90/48—Arrangements of indicating or measuring devices
    • B65D90/50—Arrangements of indicating or measuring devices of leakage-indicating devices
    • B65D90/501—Arrangements of indicating or measuring devices of leakage-indicating devices comprising hollow spaces within walls
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C2/00—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels
    • E04C2/30—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by the shape or structure
    • E04C2/34—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by the shape or structure composed of two or more spaced sheet-like parts

Definitions

  • the invention relates to a large-area double plate, in particular made of thermoplastic material. Thanks to the anchor knobs on the back, this double plate is particularly suitable for pouring into concrete or mortar and thus for corrosion protection of concrete structures. Between the plates there is a coherent leak gap, defined in its width, sealed on both sides, as defined in claims 1 and 2.
  • linings are increasingly being prescribed by the authorities, which are to be provided as a tight and durable double-jacket version with an intervening leakage gap as a monitoring space.
  • the linings have to consist of two permanent sealing layers, which are separated by a monitoring space, the leakage gap.
  • DE-A-3 830 439 discloses double plates of the type mentioned.
  • a method for producing a leak gap between two mutually independent plates is described.
  • the leakage gap is formed between a tight plate facing the stress side and a perforated plate lying behind it at a leakage gap distance, the holes of which, however, are not tight.
  • the leakage gap is therefore not enclosed by two tight thermoplastic sheets, so that liquid penetrating into the leakage gap can reach the concrete. As a result of these leaks, one cannot speak of two sealing layers.
  • the invention has for its object to provide a double plate, in particular made of thermoplastic material, which has a tight leakage gap, against external forces even with little use of material is stable and is simple and inexpensive to manufacture.
  • the invention is based on the following basic ideas.
  • a non-perforated front thermoplastic plate facing the load side is tightly and non-positively connected to a perforated rear thermoplastic plate via a multiplicity of thermoplastic anchor knobs protruding through the perforated plate while maintaining an intervening gap.
  • the part of the anchor studs protruding over the double plate is poured into concrete or mortar when the double plate is installed.
  • the connection of the two thermoplastic sheets to a double sheet is carried out so that both parts of the connected thermoplastic sheets represent their own sealing layer.
  • a major advantage of the invention is that the anchor knobs cast into the concrete for mechanically anchoring the double plate in a straight line and thus statically favorable passage derive the forces acting on the double plate into the ground.
  • the rear plate therefore has no forces to transmit or redirect and can be kept thin for the intended use.
  • Another advantage of the invention lies in the economical manufacturing possibility, which allows the double plate to be produced in one operation.
  • a front plate 1 facing the stress side is welded to another rear plate 3 facing a concrete side with the aid of anchor knobs 5.
  • the rear plate 3 has depressions 4 at the connection points to the anchor knobs, through whose openings 7 the cylindrical ends 5b of the anchor knobs 5 pass.
  • the anchor knobs 5 were welded on, their part 5b was connected to the plate 1 and at the same time a plate or a plate-like or flange-shaped widening 5a of the anchor knobs 5 to the recessed part 4 of the plate 3 by friction welding tightly and non-positively at joints 6b and 6a.
  • anchor knobs 5 serves to anchor the "double plate by pouring the anchor knobs into fresh concrete or mortar.
  • the size and shape, as well as the number of anchor knobs per m 2, depend on the requirements for uniform anchoring of those produced from the double plates Leak protection lining under assembly and operating conditions
  • the weld connection is preferably made by friction welding, eg vibration or rotation welding.
  • the plate 1 is connected to the plate 3 by means of rotational welding of the anchor knobs 5 extending through the opening 7.
  • a depression 10 located in the plate 3 when the anchor knobs 5 rotate, a simultaneous welding in the joints 6a and 6b is achieved.
  • the width of the leak gap 2 is determined by the depth of the depression 10. Due to a circumferential joint 9 in the plane of the plate 3 following the anchor knob 5, the plate 3 can expand somewhat in relation to the position of the anchor knob 5 and thus reduce the rigidity of the double plate during its assembly.
  • the double plate is produced by friction welding.
  • welding processes e.g. possible with heating element or ultrasound.
  • the plates 1 and 3 can also be connected to the anchor knobs 5 by adhesive technology.
  • the leak gap 2 of the double plate can also be divided by sealing strips 12 into a plurality of sections which are liquid-tight to one another.
  • the sealing strips 12 can be welded between the plates 1 and 3.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Mechanical Engineering (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)
  • Laminated Bodies (AREA)
  • Sewage (AREA)
  • Standing Axle, Rod, Or Tube Structures Coupled By Welding, Adhesion, Or Deposition (AREA)
  • Preparation Of Compounds By Using Micro-Organisms (AREA)
  • Glass Compositions (AREA)
  • Motorcycle And Bicycle Frame (AREA)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)

Abstract

A preferably thermoplastic twin slab, in particular destined to be fastened to a concrete wall, consists of two slabs (1, 3) which are linked together in a liquid-tight manner with anchoring knobs (5) for anchoring to a wall, a leakage gap (2) being formed therebetween. The advantages of the invention are a high stability against outer forces, a low material consumption and a simple and economical production. Also disclosed is a process for producing this twin slab.

Description

Die Erfindung betrifft eine großflächige Doppelplatte, insbesondere aus thermoplastischem Material. Diese Doppelplatte ist durch rückseitige Ankernoppen insbesondere zum Eingießen in Beton oder Mörtel und damit zum Korrosionsschutz von Betonkonstruktionen geeignet. Zwischen den Platten befindet sich ein zusammenhängender, in seiner Breite definierter, beidseitig abgedichteter Leckspalt, wie in den Ansprüchen 1 und 2 definiert.The invention relates to a large-area double plate, in particular made of thermoplastic material. Thanks to the anchor knobs on the back, this double plate is particularly suitable for pouring into concrete or mortar and thus for corrosion protection of concrete structures. Between the plates there is a coherent leak gap, defined in its width, sealed on both sides, as defined in claims 1 and 2.

Für die Auskleidung von Betonbehältern zur Lagerung wassergefährdender Flüssigkeiten werden behördlicherseits zunehmend Auskleidungen vorgeschrieben, welche als dichte und beständige Doppelmantelausführung mit dazwischenliegendem Leckspalt als Überwachungsraum vorzusehen sind. Die Auskleidungen haben hierbei aus zwei beständigen Dichtschichten zu bestehen, die durch einen Überwachungsraum, den Leckspalt, getrennt sind.For the lining of concrete containers for the storage of water-polluting liquids, linings are increasingly being prescribed by the authorities, which are to be provided as a tight and durable double-jacket version with an intervening leakage gap as a monitoring space. The linings have to consist of two permanent sealing layers, which are separated by a monitoring space, the leakage gap.

DE-A-3 830 439 offenbart Doppelplatten des genannten Typs. Es wird ein Verfahren zur Herstellung eines Leckspaltes zwischen zwei voneinander unabhängigen Platten beschrieben. Bei diesem Verfahren wird der Leckspalt zwischen einer der Beanspruchungsseite zugewandten dichten Platte und einer auf Leckspaltdistanz dahinterliegenden gelochten Platte gebildet, deren Löcher jedoch nicht dicht sind. Der Leckspalt ist also nicht von zwei dichten Thermoplastplatten eingeschlossen, so daß in den Leckspalt eindringende Flüssigkeit an den Beton gelangen kann. Infolge dieser Undichtigkeiten kann nicht von zwei Dichtschichten gesprochen werden.DE-A-3 830 439 discloses double plates of the type mentioned. A method for producing a leak gap between two mutually independent plates is described. In this method, the leakage gap is formed between a tight plate facing the stress side and a perforated plate lying behind it at a leakage gap distance, the holes of which, however, are not tight. The leakage gap is therefore not enclosed by two tight thermoplastic sheets, so that liquid penetrating into the leakage gap can reach the concrete. As a result of these leaks, one cannot speak of two sealing layers.

Aus der EP-A-0059929 ist ferner bekannt, eine Vielzahl von Ankern auf eine Thermoplastplatten-Rückseite aufzuschweißen, wobei es sich um eine Einfachplatte handelt, die ebenfalls als Auskleidung zum Schutz von Betonkonstruktionen bestimmt ist.From EP-A-0059929 it is also known to weld a plurality of anchors onto a thermoplastic sheet back, whereby it is a single slab, which is also intended as a lining to protect concrete structures.

Es ist ferner aus der DE-A- 41 35 641 ein Verfahren bekannt, bei dem zwei Einzelplatten zu einer Doppelplatte zusammengefügt werden, wobei die in den Beton einzugießenden Anker bezüglich Distanzhaltern versetzt sind, welche zur Verbindung der beiden Platten dienen. Bei dieser Ausführung sind Distanzhalter und Anker in zwei getrennten Arbeitsgängen auf die Platten aufzuschweißen, und in einem dritten Arbeitsgang wird dann die Verbindung der beiden Platten über die Distanzhalter hergestellt. Durch den Versatz der Anker bezüglich der Distanzhalter müssen die Verankerungskräfte über die rückwärtige Platte seitlich versetzt in die auf der vorderen Platte befestigten Distanzhalter übergeleitet werden. Zur Aufnahme dieser Kraftübertragung ist eine entsprechende Dicke der hinteren Platte erforderlich, die für den eigentlichen Zweck, Herstellung eines dichten Leckspaltes, ansonsten nicht notwendig wäre.It is also known from DE-A-41 35 641 a method in which two single plates are joined together to form a double plate, the anchors to be poured into the concrete being offset with respect to spacers which serve to connect the two plates. In this version, the spacer and anchor are welded onto the plates in two separate operations, and in a third operation the two plates are then connected via the spacers. Due to the offset of the anchors with respect to the spacers, the anchoring forces have to be transferred laterally offset over the rear plate into the spacers attached to the front plate. To accommodate this power transmission, a corresponding thickness of the rear plate is required, which would otherwise not be necessary for the actual purpose, producing a tight leakage gap.

Demgegenüber liegt der Erfindung die Aufgabe zugrunde, eine Doppelplatte, insbesondere aus thermoplastischem Material, zur Verfügung zu stellen, die einen dichten Leckspalt aufweist, gegen äußere Krafteinwirkungen auch bei geringem Materialeinsatz stabil ist und einfach und kostengünstig herstellbar ist.In contrast, the invention has for its object to provide a double plate, in particular made of thermoplastic material, which has a tight leakage gap, against external forces even with little use of material is stable and is simple and inexpensive to manufacture.

Diese Aufgabe wird mit den Merkmalen der Patentansprüche gelöst.This object is achieved with the features of the claims.

Bei der Lösung geht die Erfindung von folgenden Grundgedanken aus.In the solution, the invention is based on the following basic ideas.

Eine nicht gelochte, der Beanspruchungsseite zugewandte vordere Thermoplastplatte wird mit einer gelochten hinteren Thermoplastplatte über eine Vielzahl von durch die gelochte Platte hindurchstehenden thermoplastischen Ankernoppen unter Einhaltung eines dazwischenliegenden Spaltes dicht und kraftschlüssig verbunden. Der über die Doppelplatte vorstehende Teil der Ankernoppen wird bei der Montage der Doppelplatte in Beton oder Mörtel eingegossen. Das Verbinden der beiden Thermoplastplatten zu einer Doppelplatte wird so vorgenommen, daß beide Teile der verbundenen Thermoplastplatten eine eigene Dichtschicht darstellen.A non-perforated front thermoplastic plate facing the load side is tightly and non-positively connected to a perforated rear thermoplastic plate via a multiplicity of thermoplastic anchor knobs protruding through the perforated plate while maintaining an intervening gap. The part of the anchor studs protruding over the double plate is poured into concrete or mortar when the double plate is installed. The connection of the two thermoplastic sheets to a double sheet is carried out so that both parts of the connected thermoplastic sheets represent their own sealing layer.

Ein wesentlicher Vorteil der Erfindung liegt darin, daß die zur mechanischen Verankerung der Doppelplatte im Beton eingegossenen Ankernoppen in geradlinigem und damit statisch günstigem Durchgang die auf die Doppelplatte einwirkenden Kräfte in den Untergrund ableiten. Die hintere Platte hat also keine Kräfte zu übertragen, bzw. umzuleiten und kann dem Verwendungszweck entsprechend dünn gehalten sein.A major advantage of the invention is that the anchor knobs cast into the concrete for mechanically anchoring the double plate in a straight line and thus statically favorable passage derive the forces acting on the double plate into the ground. The rear plate therefore has no forces to transmit or redirect and can be kept thin for the intended use.

Ein weiterer Vorteil der Erfindung liegt in der wirtschaftlichen Fertigungsmöglichkeit, die eine Herstellung der Doppelplatte in einem Arbeitsgang erlaubt.Another advantage of the invention lies in the economical manufacturing possibility, which allows the double plate to be produced in one operation.

Bei den bisher bekannten Ausführungen von Doppelplatten ergibt sich durch die vordere und hintere, durch den Leckspalt distanzierte Platte eine hohe Steifigkeit, was bei manchen Anwendungen während der Montage auf der Baustelle Probleme verursacht. Eine Verringerung dieser Steifigkeit kann durch die Möglichkeit von Differenzdehnungen zwischen der vorderen und der hinteren Platte erreicht werden. Durch besondere Ausbildung der Verbindung zwischen der hinteren Platte und den Ankernoppen wird gemäß der Erfindung diese Dehnmöglichkeit geschaffen.In the previously known designs of double panels, the front and rear panels, which are spaced apart by the leakage gap, result in a high degree of rigidity, which is problematic in some applications during assembly on the construction site caused. A reduction in this stiffness can be achieved by the possibility of differential strains between the front and the rear plate. By special design of the connection between the rear plate and the anchor knobs this stretch is created according to the invention.

Die Erfindung wird nachstehend mit Bezug auf die Zeichnungen näher erläutert. Es zeigen:
Figuren 1 bis 3 Querschnitte durch unterschiedliche erfindungsgemäße Ausführungsformen.The invention is explained in more detail below with reference to the drawings. Show it:
Figures 1 to 3 cross sections through different embodiments of the invention.

Gemäß Fig. 1 wird eine der Beanspruchungsseite zugewandte vordere Platte 1 mit einer anderen einer Betonseite zugewandten hinteren Platte 3 mit Hilfe von Ankernoppen 5 verschweißt. Die hintere Platte 3 weist an den Verbindungsstellen zu den Ankernoppen Einsenkungen 4 auf, durch deren Öffnungen 7 die zylindrischen Enden 5b der Ankernoppen 5 hindurchreichen. Beim Aufschweißen der Ankernoppen 5 wurde deren Teil 5b mit der Platte 1 und gleichzeitig ein Teller bzw. eine teller- oder flanschförmige Verbreiterung 5a der Ankernoppen 5 mit dem eingesenkten Teil 4 der Platte 3 durch Reibschweißung dicht und kraftschlüssig an Fugen 6b bzw. 6a verbunden. Zwischen den beiden Platten 1 und 3 befindet sich ein durch die Einsenkungen 4 in seiner Breite definierter Leckspalt 2. Der über die Platte 3 vorstehende konische. oder anders geformte Teil 5c der Ankernoppen 5 dient zur Verankerung" der Doppelplatte durch das Eingießen der Ankernoppen in frischem Beton oder Mörtel. Die Größe und Formgebung sowie die Anzahl der Ankernoppen pro m2 richten sich nach den Erfordernissen einer gleichmäßigen Verankerung der aus den Doppelplatten hergestellten Leckschutzauskleidung unter Montage- und Betriebsbedingungen. Die Schweißverbindung erfolgt vorzugsweise durch Reibschweißung z.B. Vibrations- oder Rotationsschweißung.1, a front plate 1 facing the stress side is welded to another rear plate 3 facing a concrete side with the aid of anchor knobs 5. The rear plate 3 has depressions 4 at the connection points to the anchor knobs, through whose openings 7 the cylindrical ends 5b of the anchor knobs 5 pass. When the anchor knobs 5 were welded on, their part 5b was connected to the plate 1 and at the same time a plate or a plate-like or flange-shaped widening 5a of the anchor knobs 5 to the recessed part 4 of the plate 3 by friction welding tightly and non-positively at joints 6b and 6a. Between the two plates 1 and 3 there is a leakage gap 2 defined by the depressions 4 in its width. The conical protruding beyond the plate 3. or another shaped part 5c of the anchor knobs 5 serves to anchor the "double plate by pouring the anchor knobs into fresh concrete or mortar. The size and shape, as well as the number of anchor knobs per m 2, depend on the requirements for uniform anchoring of those produced from the double plates Leak protection lining under assembly and operating conditions The weld connection is preferably made by friction welding, eg vibration or rotation welding.

Gemäß Fig. 2 wird als weiteres Ausführungsbeispiel die Platte 1 mit der Platte 3 über Rotationsschweißung der durch die Öffnung 7 hindurchreichenden Ankernoppe 5 verbunden. Durch entsprechende Formgebung einer in der Platte 3 befindlichen Einsenkung 10 wird bei der Rotation der Ankernoppen 5 eine gleichzeitige Verschweißung in den Fugen 6a und 6b erreicht. Die Breite des Leckspaltes 2 wird durch die Tiefe der Einsenkung 10 bestimmt. Durch eine in der Ebene der Platte 3 im Anschluß an die Ankernoppe 5 umlaufende Ringfuge 9 kann sich die Platte 3 im Verhältnis zur Position der Ankernoppe 5 etwas dehnen und damit die Steifigkeit der Doppelplatte während ihrer Montage abbauen.2, as a further exemplary embodiment, the plate 1 is connected to the plate 3 by means of rotational welding of the anchor knobs 5 extending through the opening 7. By appropriate shaping of a depression 10 located in the plate 3, when the anchor knobs 5 rotate, a simultaneous welding in the joints 6a and 6b is achieved. The width of the leak gap 2 is determined by the depth of the depression 10. Due to a circumferential joint 9 in the plane of the plate 3 following the anchor knob 5, the plate 3 can expand somewhat in relation to the position of the anchor knob 5 and thus reduce the rigidity of the double plate during its assembly.

Die Herstellung der Doppelplatte erfolgt in einem bevorzugten Verfahren durch Reibschweißung. Es sind jedoch auch noch andere Schweißverfahren z.B. mittels Heizelement oder Ultraschall möglich. Außerdem können die Platten 1 und 3 auch durch Klebetechnik mit den Ankernoppen 5 verbunden werden.In a preferred process, the double plate is produced by friction welding. However, there are also other welding processes, e.g. possible with heating element or ultrasound. In addition, the plates 1 and 3 can also be connected to the anchor knobs 5 by adhesive technology.

Erfindungsgemäß kann entsprechend Fig. 3 der Leckspalt 2 der Doppelplatte auch durch Dichtleisten 12 in mehrere zueinander flüssigkeitsdichte Sektionen aufgeteilt sein. An diesen Sektionen können durch die Platte 1 und die Betonwand 11 nach außen führend Abfluß- und Be- und Entlüftungseinrichtungen 13 bzw. 14 vorgesehen sein, die ein sektionsweises Überprüfen der Doppelplatte auf Dichtigkeit gestatten. Auf diese Weise läßt sich vorteilhafterweise die Position eines Leckes genauer lokalisieren, so daß eine eventuelle Reparatur einer schadhaften Doppelplatte vereinfacht wird. Die Dichtleisten 12 können zwischen die Platten 1 und 3 eingeschweißt sein. Mehrere Doppelplatten können zu einem System, insbesondere zu einem Behälter zusammengesetzt sein. Vorzugsweise sind bei einem Behälter die Abflußeinrichtungen 13 am unteren Ende der Sektionen und die Be- und Entlüftungseinrichtungen 14 am oberen Ende der Sektionen angebracht, so daß Leckflüssigkeit nach unten abfließen kann.According to FIG. 3, the leak gap 2 of the double plate can also be divided by sealing strips 12 into a plurality of sections which are liquid-tight to one another. On these sections through the plate 1 and the concrete wall 11 leading to the outside drainage and ventilation devices 13 and 14 may be provided, which allow a section-wise checking of the double plate for leaks. In this way, the position of a leak can advantageously be located more precisely, so that a possible repair of a defective double plate is simplified. The sealing strips 12 can be welded between the plates 1 and 3. Several double plates can be combined to form a system, in particular a container. In the case of a container, the drainage devices 13 are preferably arranged at the lower end of the sections and the ventilation devices 14 at the upper end of the sections, so that leakage liquid can flow downward.

Claims (14)

  1. A twin plate comprising a first plate (1) and a second plate (3) which form a leakage gap (2) thereinbetween and several anchoring knobs (5) which are joined with one end with the twin plate, wherein the anchoring knobs (5) project through the second plate (3) adjacent to the free ends (5c) of the anchoring knobs (5) in such a manner that their connecting ends (5b) project through openings (7) and are connected with the first plate (1);
    characterized in that
    a) the second plate (3) comprises depressions (4) directed towards the first plate (1) and having said openings (7) for the anchoring knobs (5), wherein the second plate (3) comprising the depressions (4) rests on the first plate (1),
    b) the anchoring knobs (5) comprise disk-shaped broadenings (5a) between their connecting ends (5b) and their free ends (5c), said disk-shaped broadenings (5a) being connected to the depressions (4) such that they rest on them, and
    c) the depth of the depression (4) determines the width of the leakage gap (2).
  2. A twin plate comprising a first plate (1) and a second plate (3) which form a leakage gap (2) thereinbetween and several anchoring knobs (5) which are joined with one end with the twin plate, wherein the anchoring knobs (5) project through the second plate (3) adjacent to the free ends (5c) of the anchoring knobs (5) in such a manner that their connecting ends (5b) project through openings (7) and are connected with the first plate (1) via these connecting ends (5b),
    characterized in that
    a) the second plate (3) comprises depressions (10) directed towards the plate (1) and having openings (7) for the anchoring knobs (5), wherein the second plate (3) comprising the depressions (10) rests on the first plate (1),
    b) the anchoring knobs (5) are connected laterally with the depressions of the second plate (3), and
    c) the depth of the depression (10) determines the width of the leakage gap (2).
  3. The twin plate according to claim 1 or 2, characterized in that the plates (1 and 3) and/or the anchoring knobs (5) are made of thermoplastic material.
  4. The twin plate according to claim 2 or 3, characterized in that at the level of the second plate (3) annular grooves (9) are provided and arranged around the circumference of the anchoring knobs (5).
  5. The twin plate according to claim 3 or 4, characterized in that the anchoring knobs (5) are joined with the plates (1 and 3) by friction welding.
  6. The twin plate according to claim 3 or 4, characterized in that the anchoring knobs (5) are joined with the plates (1 and 3) by means of a heating element or ultrasonic welding.
  7. The twin plate according to any one of claims 1 to 4, characterized in that the anchoring knobs (5) are joined with the plates (1 and 3) by bonding.
  8. The twin plate according to any one of claims 1 to 7, characterized in that the anchoring knobs are connected with the plates (3 and 1) via joints (6a and 6b, respectively).
  9. The twin plate, in particular according to any one of claims 1 to 8, characterized in that the leakage gap (2) is divided into several sections, which are sealed with respect to each other in a liquid-tight manner, via sealing strips (12) between the first plate (1) and the second plate (3).
  10. The twin plate according to claim 9, characterized in that the sections are provided with discharge and aeration means (13 and 14, respectively) so that the tightness of the individual sections of the twin plate or a system of twin plates can be examined.
  11. The twin plate according to any one of claims 9 or 10, characterized in that the sealing strips (12) are welded in between the first plate (1) and the second plate (3).
  12. A container consisting of several twin plates according to any one of claims 9 to 11.
  13. A method of producing a twin plate according to any one of claims 1 to 12, characterized in that the anchoring knobs (5) are joined with the plates (1 and 3) in a single step.
  14. A method of producing a twin plate according to any one of claims 1 to 12, characterized in that the anchoring knobs (5) are joined with the plates (1 and 3) in two separate steps.
EP94902779A 1992-12-17 1993-12-16 Twin slab Expired - Lifetime EP0673341B1 (en)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
DE4242834A DE4242834A1 (en) 1992-12-17 1992-12-17 Thermoplastic double plate for corrosion protection of concrete structures
DE4242834 1992-12-17
DE4329704 1993-09-02
DE4329704 1993-09-02
PCT/EP1993/003583 WO1994013560A1 (en) 1992-12-17 1993-12-16 Twin slab

Publications (2)

Publication Number Publication Date
EP0673341A1 EP0673341A1 (en) 1995-09-27
EP0673341B1 true EP0673341B1 (en) 1997-05-28

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Application Number Title Priority Date Filing Date
EP94902779A Expired - Lifetime EP0673341B1 (en) 1992-12-17 1993-12-16 Twin slab

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Country Link
EP (1) EP0673341B1 (en)
CN (1) CN1097231A (en)
AT (1) ATE153624T1 (en)
AU (1) AU677057B2 (en)
DE (1) DE59306616D1 (en)
TW (1) TW286336B (en)
WO (1) WO1994013560A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU4109297A (en) * 1996-09-27 1998-04-17 Merkler, H. Tank for liquids, particularly for chemically aggressive liquids

Family Cites Families (5)

* Cited by examiner, † Cited by third party
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DE1243375B (en) * 1961-06-10 1967-06-29 Guenter Fuchs Dipl Ing Storage container to be embedded in the ground
CH533556A (en) * 1972-07-01 1973-02-15 H Schaerer Max Storage container for water-polluting liquids
DE3830439A1 (en) * 1988-09-07 1990-03-15 Steuler Industriewerke Gmbh METHOD FOR PRODUCING A LEAK DETECTION AND / OR WARM INSULATION GAP BETWEEN A WALL AND COVERING PANELS AND COVERING PANELS USED THEREFOR
DE4135641A1 (en) * 1991-10-29 1993-05-06 Steuler-Industriewerke Gmbh, 5410 Hoehr-Grenzhausen, De DOUBLE-WALLED LINING ELEMENT AND METHOD FOR THE PRODUCTION THEREOF
DE4205033A1 (en) * 1992-02-19 1993-08-26 Lothar Mansfeld METHOD FOR ATTACHING A PROTECTIVE FILM TO A WALL, AND PROTECTIVE FILM AND ANCHOR SYSTEM PROVIDED THEREFOR

Also Published As

Publication number Publication date
TW286336B (en) 1996-09-21
EP0673341A1 (en) 1995-09-27
AU6653594A (en) 1994-07-04
AU677057B2 (en) 1997-04-10
DE59306616D1 (en) 1997-07-03
ATE153624T1 (en) 1997-06-15
CN1097231A (en) 1995-01-11
WO1994013560A1 (en) 1994-06-23

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