Classifications

• • E—FIXED CONSTRUCTIONS
  • E04—BUILDING
  • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
  • E04C3/00—Structural elongated elements designed for load-supporting
  • E04C3/02—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces
  • E04C3/29—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces built-up from parts of different material, i.e. composite structures
  • E04C3/293—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces built-up from parts of different material, i.e. composite structures the materials being steel and concrete
• • E—FIXED CONSTRUCTIONS
  • E04—BUILDING
  • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
  • E04B5/00—Floors; Floor construction with regard to insulation; Connections specially adapted therefor
  • E04B5/16—Load-carrying floor structures wholly or partly cast or similarly formed in situ
  • E04B5/17—Floor structures partly formed in situ
  • E04B5/23—Floor structures partly formed in situ with stiffening ribs or other beam-like formations wholly or partly prefabricated
  • E04B5/26—Floor structures partly formed in situ with stiffening ribs or other beam-like formations wholly or partly prefabricated with filling members between the beams
  • E04B5/261—Monolithic filling members
  • E04B5/263—Monolithic filling members with a flat lower surface
• • E—FIXED CONSTRUCTIONS
  • E04—BUILDING
  • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
  • E04B5/00—Floors; Floor construction with regard to insulation; Connections specially adapted therefor
  • E04B5/48—Special adaptations of floors for incorporating ducts, e.g. for heating or ventilating
• • E—FIXED CONSTRUCTIONS
  • E04—BUILDING
  • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
  • E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
  • E04C5/01—Reinforcing elements of metal, e.g. with non-structural coatings
  • E04C5/06—Reinforcing elements of metal, e.g. with non-structural coatings of high bending resistance, i.e. of essentially three-dimensional extent, e.g. lattice girders
  • E04C5/065—Light-weight girders, e.g. with precast parts
  • E04C5/0653—Light-weight girders, e.g. with precast parts with precast parts

Definitions

• the present invention relates to a prefabricated floor element for buildings and a floor consisting of an assembly of such elements.
• the present invention aims to provide a floor made from prefabricated floor elements lightweight, resistant and economical by combining the techniques of pre-slab type and beams-slabs and the use of high performance and self-leveling concretes.
• the floor of the present invention is of prefabricated concrete frame type in the factory.
• the present invention proposes a prefabricated floor element for a building characterized in that it consists of a structure comprising concrete beams cast in half-boxes, interjoists and a sub-face pre-slab connected to the half-boxes by connectors having an upper part driven into the beams and a lower end trapped in the concrete of the underside.
• the floor is a honeycomb floor.
• the beams are post-tensioned beams.
• the element advantageously comprises reservoirs for storing steel incorporated in the half-casings of the beams.
• the element preferably comprises dimensioned structural steels, incorporated in the floor and tensioned after hardening of the concrete beams.
• the underside is connected to the beams by connectors adapted to ensure suspension of the ceiling while maintaining the horizontality of the ceiling.
• the connectors are advantageously self-adjusting height connectors.
• At least some interjoists consist of insulation panels arranged between the beams.
• the floor element comprises a plane insulation panel interposed between the underside and the half-boxes.
• the floor element of the invention comprises a concrete panel covering the beams.
• FIG. 1 an exploded perspective view of a floor element made according to the invention
• FIG. 2 a perspective view of a part of the floor element of FIG. 1 assembled
• FIG. 3 a cutaway perspective view of a detail of the floor of FIG. 1;
• FIG. 4 a perspective side view of a construction element of the floor element of FIG. 1;
• Figure 5 a longitudinal sectional view of a floor made from the floor element of Figure 1;
• FIG. 6 a cross-sectional view of a floor made from the floor element of FIG. 1;
• Figure 7 a sectional view of an example of usable connector for the floor of the invention.
• the exploded floor consists of a structure mainly comprising concrete beams 1 and a pre-slab sub-face 4 of lightened concrete.
• the concrete beams are made by pouring concrete in half-boxes 2.
• the finished floor also comprises interjoists 3 and a concrete panel 12 covering the beams, the term intervous being the technical term of the filling system between beams of a floor slabs.
• the innovative character of the floor of the present invention is mainly the prefabrication of a concrete floor following the technique of the beam-slab construction providing a great lightness and the use of a lightened concrete underside which provides a finish allowing directly make the ceiling of a lower floor by a simple painting.
• the concrete of the underside is a lightweight concrete, according to the terminology used for a concrete comprising light aggregates (polystyrene beads, expanded clay, or expanded glass for example).
• the beams are beams post-tensioned by means of rods 5.
• the half-boxes for molding the beams comprise a lower part forming a box 2a without a cover and an upper part 2b consisting of two longitudinal walls.
• sheaths 8 for reserving steels 5 are incorporated in the half-boxes 2 for casting the beams.
• the half-boxes can be made of a plastic material by extrusion, the sleeves of reservations being in the form of tubes connected to the walls of the half-boxes by a rib 8a, the inside of the sheaths being brushed or filled with a lubricating material such as that a grease to allow to slide the steels in the form of rods 5 as shown in Figure 4 and to ensure their protection.
• Figure 4 shows structural steels incorporated in the floor, at least some of which consist of rods slid into the sheaths 8 and tensioned after hardening of the concrete beams.
• FIG. 4 shows the unfilled half-boxes of the concrete beams to make more visible the positioning of the sheaths 8, it is necessary to consider that the steels are stretched after casting and drying concrete beams.
• the steels 5 realize a post-tension of the beams which stiffens the floor and gives it its resistance.
• the underside 4 is connected to the beams 1 by connectors 9 adapted to ensure a suspension of the ceiling while maintaining the horizontality of the ceiling.
• the plates forming the underside, made of lightened thin concrete, are connected to the beams by self-adjusting connectors that maintain the horizontality of the ceiling regardless of the camber of the post-tension applied on the beams by the tension of the steels and the loads on the floor reducing this arch.
• the connectors 9 are for example connectors of the type described in Figure 7 having an upper part through the boxes and embedded in the concrete beams and a lower portion trapped in the concrete of the underside.
• the upper part of the connectors 9 comprises a sheath 20 in which a tip 21 slides and the lower part of the connectors has a terminal 22 serving as a harpoon for holding the connector in the concrete of the underside.
• the sheath 20 is driven into holes made in the lower part of the boxes and the termination 22 is trapped in the concrete of the underside 4.
• the latter comprises means adapted to ensure suspension of the ceiling while maintaining the horizontality of the ceiling.
• These means are here a spring 23 which is disposed between a collar 24 of the sleeve and a terminal bulge 24 of the tip and forms a suspension member allowing a slight spacing between the beam and the underside which makes the self-adjusting connector.
• the sheath comprises, according to the example on its outer face, a support flange 25 under the half box in which the beam is cast.
• the connector further comprises points, rings or other anchoring element 26 which ensure the retention of the sleeve in the concrete of the beam.
• the anchoring elements 26 can be inserted by force into the lower wall of the half boxes.
• interjoists 3 Between the half-boxes receiving the beams are arranged interjoists 3 and at least some of the interjoists 3 consist of insulation panels.
• the boxes have external shoulders on which rest the lateral ends of interjoists.
• the floor element further comprises a planar insulation panel 10 interposed between the underside and the half-boxes.
• FIG. 3 represents a stepped section of the floor of FIG. 1 which makes it possible to better distinguish the constituent elements of the floor, from the bottom upwards, the sub-surface 4 cast for example in a flat mold, the flat insulation panel 10 placed on the underside, a half-box 2 with a connector 9 whose tip is pressed into the liquid concrete of the underside, the beam 1 cast in the half-box, a interjoists 3 placed on the shoulder of the half-box and the above the half box a concrete panel 12 covering the beams and a connecting steel 14 inserted into the fresh concrete beams to bind to the concrete panel 12 and ensure the final connection with the distribution slab that will be poured on the site.
• the space between the interjoists 3 and the planar insulation 10 constitutes reservations 1 1 for housings and / or electrical conduits.
• the insulation 3, 10 in panels such as rock wool panels or the like is incorporated in the manufacture of the rigid panel floor, the insulation 10 disposed on the entire upper surface of the underside eliminates the thermal bridges and provides sound insulation.
• the result is a concrete floor, honeycomb, soundproofing and thermal 3, integrated 10, waterproof and a mass of the order of 260 kg / m2 compared to solid concrete whose mass is 450kg / m2 .
• the floor elements thus consist of a sandwich whose external faces are the concrete sub-face 4 and the concrete top panel 12, which protrude from the connecting steels 14, the beams and the insulating panels being held between these two blades. concrete.
• the invention makes it possible to produce floors of various thicknesses according to the desired insulation coefficient by varying the thickness of the insulating panels 3, 10 and the height of the upper part of the half-boxes 2.
• the side junctions of the panels have a male-female profile at 90 ° to ensure perfect alignment and excellent bonding quality of two successive floor elements.
• the floor of the present invention is to be considered as a floor slab with prestressed beams.
• Figure 5 shows a floor element of the invention in longitudinal section.
• the beam has an arrow F which causes a detachment of the beam relative to the underside 4 and the insulating plane 10.
• the spring 23 of the connector 9 is compressed by the weight of the underside and allows said detachment.
• This figure also makes it possible to visualize the position of the connecting steels 14 which protrude from the upper panel 12 of the floor element.
• FIG. 6 still shows in longitudinal section the finished floor on site after laying a welded mesh 27 and the necessary steels and casting a distribution slab 13.
• the casting of the distribution slab on the site limits the transport of concrete to the quantity necessary for the realization of the distribution slab.
• An important aspect of the floor of the invention is also in the incorporation of sheaths 8 of steel reservations in the half-boxes in which is poured concrete beams.
• Structural steels 5 are dimensioned, incorporated and stretched after hardening of the concrete.
• This manufacturing technique allows a very high production rate, the storage of a single product, the finish of the product on demand and a quick delivery after the order.
• Laying the floor requires the use of holding props for 1 to 2 days compared to the 15 to 20 days required for a solid concrete floor.
• a single operation ensures the installation of the floor, the installation of the ceiling, the installation of the insulation, the installation of the boxes and the electric tubes, the installation of the pipelines hot water - cold water possibly.
• the concrete saving is 38% compared to a concrete floor on pre-slabs or solid and the saving of steel is of the order of 70%.
• the realization of the floor of the invention provides a saving of aggregate and cement.
• the floor of the invention very light for a concrete construction, 260kg / m2 allows a reduction of the descents of charges on the foundations, provides a great ease of implementation and makes possible the realization of large elements.
• the implementation on site is fast, of the order of 120 m2 / day floor with a team of 3 companions.
• the floor of the present invention is suitable for all climates and at all latitudes.

Landscapes

• Engineering & Computer Science (AREA)
• Architecture (AREA)
• Civil Engineering (AREA)
• Structural Engineering (AREA)
• Physics & Mathematics (AREA)
• Electromagnetism (AREA)
• Chemical & Material Sciences (AREA)
• Composite Materials (AREA)
• Forms Removed On Construction Sites Or Auxiliary Members Thereof (AREA)
• Building Environments (AREA)
• Floor Finish (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=44544012

Family Applications (1)

Country Status (3)

Family Cites Families (5)

• 2011
  • 2011-02-24 FR FR1151519A patent/FR2972014B1/fr not_active Expired - Fee Related
• 2012
  • 2012-02-23 WO PCT/EP2012/053075 patent/WO2012113868A1/fr active Application Filing
  • 2012-02-23 EP EP12704851.0A patent/EP2678488A1/de not_active Withdrawn

Non-Patent Citations (2)

Also Published As

Similar Documents

Legal Events