EP0628678A1 - Eléments pour planchers surélevés à auto-nivellage - Google Patents

Eléments pour planchers surélevés à auto-nivellage Download PDF

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Publication number
EP0628678A1
EP0628678A1 EP93201627A EP93201627A EP0628678A1 EP 0628678 A1 EP0628678 A1 EP 0628678A1 EP 93201627 A EP93201627 A EP 93201627A EP 93201627 A EP93201627 A EP 93201627A EP 0628678 A1 EP0628678 A1 EP 0628678A1
Authority
EP
European Patent Office
Prior art keywords
plate
shaped
wall
channel
mortar
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.)
Ceased
Application number
EP93201627A
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German (de)
English (en)
Inventor
Floris Van Dijk
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.)
Ubbink Nederland BV
Original Assignee
Ubbink Nederland BV
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 Ubbink Nederland BV filed Critical Ubbink Nederland BV
Priority to EP93201627A priority Critical patent/EP0628678A1/fr
Publication of EP0628678A1 publication Critical patent/EP0628678A1/fr
Ceased legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
    • E04F15/00—Flooring
    • E04F15/02—Flooring or floor layers composed of a number of similar elements
    • E04F15/024—Sectional false floors, e.g. computer floors
    • E04F15/02405—Floor panels
    • E04F15/02417—Floor panels made of box-like elements
    • E04F15/02423—Floor panels made of box-like elements filled with core material
    • E04F15/02429—Floor panels made of box-like elements filled with core material the core material hardening after application

Definitions

  • the invention relates to a synthetic floor element for cavity floors to be poured with a hardening material which flows out of its own accord, such as plastified and/or fine-grained concrete mortar or anhydrite or the like, comprising a plate-shaped member supporting the mortar and a number of supporting columns projecting downwards therefrom for supporting the plate-shaped member, and thereby the mortar for the cavity floor to be formed, on an existing foundation.
  • a hardening material which flows out of its own accord, such as plastified and/or fine-grained concrete mortar or anhydrite or the like, comprising a plate-shaped member supporting the mortar and a number of supporting columns projecting downwards therefrom for supporting the plate-shaped member, and thereby the mortar for the cavity floor to be formed, on an existing foundation.
  • Such floor elements are often used for forming a double floor structure, for instance when this is desired for concealing wiring, such as wires for computers. After completion of the floor, these wires can simply be conveyed through the columns to the desired location and will thereafter be out of sight. It will be understood that forming an additional floor will not only entail an additional load for the existing floor, but also for the structure of the building concerned. It is essential, therefore, to keep the weight of the cavity floor to a minimum, but to ensure at the same time that the requirements of strength are met.
  • Floor elements for cavity floors can be considered first of all as stay-in-place formwork plates. Although floor elements can be designed for load-bearing, this is not preferred because it will often lead to a relatively large weight. It would be better to form the cavity floor to be poured by means of the floor elements in such a way, that it can be self-supporting. A demand made of the floor elements will then be that they can hold the poured mortar and mould it in such a way that, after hardening, the layer of mortar will be able to transfer the loads excercized on it, onto the foundation.
  • the columns in the floor element according to the invention provide a self-levelling action hereto, so that the top surface of the plate-shaped member can remain substantially horizontal, notwithstanding the presence of some unevenness in the foundation.
  • a floor element is provided as described in claim 11. Said measures, whether or not in combination, allow for the use of such a material with a low E-modulus, making it possible to also use, for instance, polyethylene or polypropylene for this purpose.
  • the thickness of the material can herein be kept small, which is advantageous from both the point of view of manufacturing costs and from the point of view of weight.
  • Another problem which occurs often in pouring cavity floors is that of the sealing at the transitions between the mutual floor elements.
  • the sealing problems can occur first of all along the sides of the floor elements.
  • the invention provides a floor elements as described in claim 12 and in claim 14.
  • the second sealing problem occurs at the vertices, where floor elements connect.
  • the invention provides floor elements as described in claim 13 and 15. It will be clear that this inventive concept is applicable on floor elements with every (possibly regular) sort of polygonal shape, such as for instance hexagonal or octaganol floor elements. A rectangular floor element is preferred.
  • the nesteable floor element 1 represented in figures 1 and 2 comprises a plate 2 and a series of supporting columns 3 projecting downwards therefrom, said supporting columns being arranged in rows according to a matrix.
  • the plate 2 of the floor element 1 is rectangular with long sides 5 and 7 and short sides 4 and 6 at right angles thereto.
  • the long side 5 and the short side 4 are formed with a continuous channel-shaped profile, as represented in figure 3, and meet in vertex 8.
  • the long side 7 and the short side 6 are also formed with a continuous channel profile, which is essentially of a similar shape as the channel profile of the sides 4 and 5 but which is formed to fit into this, and meet in vertex 11.
  • the long side 7 and the short side 4 meet in vertex 9 and the long side 5 and the short side 6 meet in vertex 10.
  • Straight channels 15 extend between the neighbouring columns 3, said channels being formed in the plate 2 and, as shown in the drawing, being open towards the top.
  • Diagonally opposed columns 3 are interconnected by means of channels 13, which are also formed in the plate 2 and are also open towards the top and meet at intersections 14, constituted by a bowl-shaped recession from the top surface 12 of the plate 2, of which bowl-shaped recession 14 the bottom has a position which is slightly raised in relation to the bottom of the channels 13.
  • the floor element 1 is formed as a whole, preferably by vaccum-forming, and made from a material with a low E-modulus, for instance 600-1600 N/mm2 with a wall thickness which is in general 2 to 3 mm in the plate. Every suitable synthetic material can be used, but as a consequence of the stiffness of form of the floor element which will be described later, ecologically sound materials, such as polyethylene and polypropylene, are also possible.
  • FIG. 1 shows that column 3 which is shown there, which is formed here as body of revolution, passes into the top surface 12 of the plate 2 via a transition area 17.
  • the transition area 17, 51 is at an angle ⁇ of about 45° in relation to the plate 2.
  • the transition to the top surface 12 is determined by a pronounced edge, which also holds true for the transition 50 of the transition area 17 to the top part 19 of the column 3.
  • Such a buckled course reduces the chance of undesired folding lines occurring in the floor element 1 when it is walked upon, or when this is heavily loaded in any other way.
  • the top part 19 of the column 3 comprises an outer wall 21, which is bent over at the bottom end with a torus-part-like supporting area 26 to an essentially upright wall 22 situated inside of this.
  • the inner wall or second wall 22 is formed as a whole with a bridge member 20, which is connected to the second wall 22 by means of an area with, in relation to the second wall 22, a reduced thickness.
  • Column core 18 is essentially U-shaped with a roundgoing third wall 23 and a closed bottom 27.
  • the thickness of the bridge member 20 increases in radial inward direction from weakening 25 to corner 24, where it has a thickness which corresponds to the thickness of the third wall 23.
  • the column core projects about 4-8 mm outside the supporting area 26, the cross-section of the column core is about 30-60 mm and the thickness of the wall of the column 3 is less than the thickness of the wall of the plate 2, for instance 1 mm.
  • the weakening 25 has a thickness of 0.2-0.6 mm.
  • the radial dimension of the chamber 53, which is formed by the second wall 22, the bridge member 20 and the third wall 23 is about 5-15 mm with a depth, considered in vertical direction of the column, of between 0 (not represented) and 20 mm at the deepest point.
  • the column 3 is self-levelling.
  • FIG. 4A the situation is shown with a flat foundation 30, in figure 4B the situation is shown with an elevation as unevenness in the underground 30, and in figure 4C the situation is shown with a recession as unevenness in the foundation 30.
  • the floor element 1 will rest, with the column 3 concerned, on foundation 30.
  • the column core 18 projects somewhat downwards from the column part 19.
  • the presence of the hinge 25 allows for a displacement of column core 18 in upward direction in relation to column part 19, until both supporting area 26 and bottom 27 come to rest on the foundation 30.
  • the wall 23 might become slightly concave (seen in a vertical plane).
  • the column core 18 can be displaced upwards even further in relation to the column member 19, for instance when an elevation with a height of several milimeters is present.
  • the column 3 then rests once again with both the supporting area 26 and the bottom 27, via the elevation, on the foundation 30.
  • This construction avoids the column 3 being pushed upwards in this spot by the elevation, as a consequence of which the plate 2 would project in this spot from the, preferably horizontal, plane of the top surface 12 of the plate 2, which would result in the floor which is to be poured eventually, to be locally less thick.
  • the bridge member 20 can be designed in many different ways. The shown embodiment is preferred, wherein the bridge member too defines an angle ⁇ of about 75° (a choice within the preferred range of 60-90°) with the second wall 22. This embodiment reduces the chance that the column core 18 will pass beyond deadcentre and will not be able to return to the original position. An alternative would be that the position of the hinge 24 and the relatively stiff corner 25 are interchanged.
  • the bridge member 20 extends essentially horizontally from the second wall 22 to the third wall 23. In that case, the risk of passing beyond deadcentre is smaller and it could be considered to replace the relatively stiff corner 24 by a weakening as well, wherein then even the bridge member as a whole can be constructed in a weakened form.
  • This wall 56 forms a plane of material which increases the stiffness against bending in a plane perpendicular to the axis of the channel.
  • the interruption in the walls of channel 15 formed by the portion 56 also prevents the occurring of a folding line in the top edge (connection channel wall - top surface 12) of the channel wall or in the lower edge (connection channel wall - channel bottom). This might otherwise occur when someone puts his foot on the area defined by channel 15 and two neighbouring diagonal channels 13.
  • the channels 15 with their bottom 29 connect higher to the transition area 17 of the column 3 than the diagonal channels 13 with their bottom 28.
  • the channels 13 and 15 can have a depth of 15 to 25 mm with the aforementioned plate thickness of 2 to 3 mm.
  • the step in height between the channel portion 15 and channel portion 16 can be 5 mm, and the lateral step at this position can on both sides be, for instance, 4 mm.
  • the bearing capacity is further increased in comparison with known floor elements for cavity floors by the asymetrical design of the floor element, as is represented in figure 1.
  • the short side 4 and the long side 5 run right next to, but just outside the columns 3, while the long side 7 and the short side 6 are situated at considerably more distance therefrom.
  • the area between the columns 3 and the edges of the sides 6 and 7 is stiffened by channels 15' and 13'.
  • the area between the columns 3 and the sides 4 and 5 is stiffened by channels 15''.
  • the cross-section of the channels 15', 15'' and 13' corresponds to those of the channels 15 and 13.
  • FIG. 3 The cross-section of the channel-shaped profile of the edge areas 4 and 5 is depicted in figure 3. It can be clearly seen that the top surface 12 of the plate 2 passes into a strip 49 via a step or wall 48, said strip 49 itself ending in a trapezoidal channel 43, with wall 47, bottom 46 and opposite wall 45, which latter wall merges on the top side into an essentially horizontal supporting strip 44.
  • Figure 6 shows a cross-sectional view of the channel-shaped edge areas of the sides 6 and 7.
  • the top surface 12 of the plate 2 passes directly into the channel 31, which is trapezoidal in shape with side walls 33 and 35 and bottom 34, wherein the side wall 33 passes at its top end into a horizontal supporting strip 32.
  • the dimensions of the channels 31 and 43 are chosen in relation to each other in such a way, that they fit well into one another, while forming a sealing area against mortar leakage which is, considered cross-wise, long and changed in direction.
  • the channel 31 can have a width on the top side of 20 mm with a height of 15 mm and the channel 43 can have a width at the top side of 25 m with a height of 17 mm, wherein the walls of both channels are under an angle of 15° with the vertical and the thickness of the material is 3 mm. Because of the chosen form of structure, sufficient sealing is also quaranteed if some clearance is left between both edge areas which have been fitted into one another.
  • the floor element according to the invention has corner areas which all differ from one another.
  • the corner area 8 where two channels 43 meet lets these channels merge.
  • the corner area 9 where the channel 43 of the short side 4 and the channel 31 of the long side 7 meet this latter channel has been extended to near the edge of the side 4.
  • the top surface 12 of the plate 2 has been extended, but a truncated-pyramid-like recess 36 has been formed therein which can have a heigth of 15 mm.
  • the surface 37 of the corner area 10 merges into the channel 43 of the long side 5 by means of vertical step wall 38.
  • the top surface 12 has been raised to corner area 39 via vertical step walls 41 and 42, said corner area 39 being provided at its bottom side with a centring projection 40.
EP93201627A 1993-06-08 1993-06-08 Eléments pour planchers surélevés à auto-nivellage Ceased EP0628678A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP93201627A EP0628678A1 (fr) 1993-06-08 1993-06-08 Eléments pour planchers surélevés à auto-nivellage

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP93201627A EP0628678A1 (fr) 1993-06-08 1993-06-08 Eléments pour planchers surélevés à auto-nivellage

Publications (1)

Publication Number Publication Date
EP0628678A1 true EP0628678A1 (fr) 1994-12-14

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EP93201627A Ceased EP0628678A1 (fr) 1993-06-08 1993-06-08 Eléments pour planchers surélevés à auto-nivellage

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003046307A1 (fr) * 2001-11-30 2003-06-05 Pontarolo Engineering S.R.L. Element modulaire et procede pour isoler et ventiler un toit
EP2028326A1 (fr) * 2007-08-20 2009-02-25 Surecav Ltd Espaceur pour murs creux, bâtiment et procédé

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0057372A1 (fr) * 1981-02-04 1982-08-11 Schmidt Reuter Ingenieurgesellschaft mbH & Co. KG Plancher creux
WO1986002120A1 (fr) * 1984-10-04 1986-04-10 Bta Boden-Technik Ag Element d'appui en feuille flexible et son utilisation pour des planchers
EP0339537A2 (fr) * 1988-04-23 1989-11-02 Gerhard Binder Plancher creux
DE4201436C1 (fr) * 1992-01-21 1993-04-15 Schmidt Reuter Ingenieurgesellschaft Mbh & Partner Kg, 5000 Koeln, De

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0057372A1 (fr) * 1981-02-04 1982-08-11 Schmidt Reuter Ingenieurgesellschaft mbH & Co. KG Plancher creux
WO1986002120A1 (fr) * 1984-10-04 1986-04-10 Bta Boden-Technik Ag Element d'appui en feuille flexible et son utilisation pour des planchers
EP0339537A2 (fr) * 1988-04-23 1989-11-02 Gerhard Binder Plancher creux
DE4201436C1 (fr) * 1992-01-21 1993-04-15 Schmidt Reuter Ingenieurgesellschaft Mbh & Partner Kg, 5000 Koeln, De

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003046307A1 (fr) * 2001-11-30 2003-06-05 Pontarolo Engineering S.R.L. Element modulaire et procede pour isoler et ventiler un toit
EP2028326A1 (fr) * 2007-08-20 2009-02-25 Surecav Ltd Espaceur pour murs creux, bâtiment et procédé

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