Static structures (e.g. – buildings) – With synthetic resinous component – With nonresinous component
Patent
1994-05-20
1996-05-07
Friedman, Carl D.
Static structures (e.g., buildings)
With synthetic resinous component
With nonresinous component
52249, 52333, 52508, 52511, 5274505, 220469, 249 35, 249 44, 2491141, E04B 162, B65D 9004
Patent
active
055134742
DESCRIPTION:
BRIEF SUMMARY
The present invention relates to a double-walled formwork or lining element comprising two large-area panels suitable for use as mould shuttering, particularly in the concrete construction industry, as well as to a process for manufacturing it.
Shutterings or linings are used as chemically resistant, liquid-tight and gas-tight protection for a variety of applications, e.g. for concrete containers, pipelines, channels etc.
The EP-A-0 059 929 discloses formwork elements which consist of a lining panel composed of thermoplastic material and which are attached to for instance the wall of concrete constructions by means of a plurality of anchoring knobs.
For a number of cases, the shuttering must have a double-walled structure; this applies particularly to containers, pipelines, channels etc. which are designed to contain or to convey highly water-polluting liquids or are subject to specific requirements for the purpose of preventing water and/or groundwater pollution. This means that for instance the container walls have to be protected by two liquid-tight and gas-tight layers of shuttering.
For this purpose, liquid-tight and gas-tight containers made of thermoplastic material are known which are for instance placed into a concrete container lined with the above described panels. This measure has the disadvantage that e.g. the interior liquid-receiving container is not in force-locking engagement with the concrete construction and/or the lining panel directly fixed on the concrete. Therefore, it cannot absorb any backward or lateral forces and is not secured against any shifts.
In contrast to this, it is an object of the present invention to provide a large-area formwork element suitable for use as mould shuttering and comprising two substantially parallel panels forming a continuous cavity between them, as well as a process for manufacturing it, wherein the two lining panels are joined to each other by force-locking, liquid-tight and gas-tight engagement.
This object is achieved with the features of the claims.
The solution of the invention is based on the following ideas:
A first lining panel manufactured according to conventional methods which is provided with anchoring knobs welded onto it is connected to a second lining panel by means of a plurality of connecting knobs. The connecting knobs are affixed to the second lining panel, they are inserted into bores of the first lining panel and welded to it to produce a liquid-tight and gas-tight joint. In this connection, the exposed part of the connecting knobs between the two lining panels determines the distance of the panels to each other. In the case of e.g. a container, the first lining panel is secured to e.g. a concrete wall by means of the anchoring knobs in such a way that it lies on the concrete wall while the second lining panel is in contact with e.g. a liquid.
The advantages of the present invention are that it allows the two lining panels to be firmly joined to each other and secured against shifts or slippage; any leak liquid produced may run off between the two panels. In addition, the formwork element according to the present invention also enables shuttering systems to be assembled cheaply and simply for constructions of various shapes; furthermore, the joint between the lining panels is form-locking.
It is preferred that the individual parts of the formwork element, such as the two lining panels, the anchoring knobs and the connecting knobs, are made of plastics, thermoplastic materials being particularly preferred. It is possible to either produce the individual parts from the same material or from different materials.
In the following, the invention is described in more detail with reference to the accompanying drawings wherein
FIG. 1 shows a partial cross-sectional view of an embodiment of the present invention attached to a concrete wall,
FIG. 2 shows a partial cross-sectional view of another variant of the embodiment of the present invention illustrated in FIG. 1,
FIG. 3 shows a partial cross-sectional view of a shuttering system accord
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Friedman Carl D.
Rauchfuss, Jr. George W.
Saladino Laura A.
Steuler-Industriewerke GmbH
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