Static structures (e.g. – buildings) – Processes – Filling preformed cavity
Patent
1986-02-19
1989-01-24
Perham, Alfred C.
Static structures (e.g., buildings)
Processes
Filling preformed cavity
521691, 521699, 5216911, 249 13, 264 31, E04B 100, E04G 2100, E02D 2702
Patent
active
047993480
DESCRIPTION:
BRIEF SUMMARY
The invention relates to a process for economically forming a concrete, flooring constructed on an earth platform and bearing on pin point foundations, as well as apparatus for implementing this process.
A construction without a basement, and in particular individual houses without a basement, are generally erected on perimetric walls built on the ground, or at least to the regulation frost free depth, with concrete poured between these walls to form a non supporting floor. A more interesting solution in so far as insulation, both to cold and dampness, is concerned consists in forming a cavity, i.e.in forming a supporting floor independent of the ground and resting on the perimetric walls. This solution is of course more costly than the preceding one, since it requires perimetric walls to be built to a great height.
The object of the present invention is to overcome the drawbacks of the known solutions outlined above and it proposes providing all the advantages of the cavity by using a particularly economic process.
The process of the invention consists in forming pin point foundations, either by means of wells concreted to the regulation depth or on the resisting layers of the ground, or by means of micro-piles, these foundations being set up in a regular pattern defined by the dimensions of the floor to be formed and the weight of the building, in levelling the ground at the level of said pin point foundations, disposing on the ground thus prepared a recoverable shuttering at the periphery of the floor to be formed then non recoverable shuttering elements in the center for forming the ribs of the floor with possibly means for connecting these elements together so as to ensure the continuity of each rib, disposing elements for sealing, insulating and spacing the bottoms of beams and ribs between the rows of non recoverable shuttering elements, reinforcing the periphery and rib beams, disposing a reinforcement trellis for the floor, then pouring concrete over the assembly thus formed, generally by pumping.
The process allows regular through passages to be formed in the web of the periphery beams and girders for ventilating underneath the floor, or possibly for passing ducts therethrough which might have been forgotten before pouring of the concrete.
It will be understood that, providing the pin point foundations have been provided at a sufficient level, the process o the invention allows a basement to be formed subsequently, if such should prove desirable one day, without underpinning the building and so at very low cost.
According to the invention, the apparatus for implementing the process comprises non recoverable shuttering elements made from a light and strong material. These non recoverable shuttering elements may for example be formed by blocks of expanded plastic material foam, or from cardboard caissons reinforced by a cell like network. The cardboard caissons have the advantage of being delivered flat and are set up in volume on the work site, without requiring special tools, with reinforcing cross pieces.
The non recoverable shuttering elements are fitted end to end by means of special elements, called connection elements, for forming a rib continuity. These special elements may form shuttering for an intermediate cross beam reinforcing the rigidity of the floor. By extension of this idea, the shuttering elements could be square so as to form a "honeycomb" floor if the conditions of use or load require it.
The connection elements may comprise reservations serving as through passages perpendicular to the ribs.
The rigidity of the floor is obtained by the height of the ribs, formed economically because of the low cost of the non recoverable shuttering.
In their upper part, the non recoverable shuttering elements may receive devices for spacing the strengthening trellis work of the floor. Depending on the nature of the floor to be formed, the spacers may be fitted to one or more trellis work layers.
Between the rows of non recoverable shuttering elements are disposed spacer elements which define th
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Brami Max
Mazarguil Pierre
Drucker William A.
Perham Alfred C.
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