Classifications

• • E—FIXED CONSTRUCTIONS
  • E04—BUILDING
  • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
  • E04B2/00—Walls, e.g. partitions, for buildings; Wall construction with regard to insulation; Connections specially adapted to walls
  • E04B2/84—Walls made by casting, pouring, or tamping in situ
  • E04B2/86—Walls made by casting, pouring, or tamping in situ made in permanent forms
  • E04B2/8647—Walls made by casting, pouring, or tamping in situ made in permanent forms with ties going through the forms
• • E—FIXED CONSTRUCTIONS
  • E04—BUILDING
  • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
  • E04B2/00—Walls, e.g. partitions, for buildings; Wall construction with regard to insulation; Connections specially adapted to walls
  • E04B2/84—Walls made by casting, pouring, or tamping in situ
  • E04B2/86—Walls made by casting, pouring, or tamping in situ made in permanent forms
  • E04B2/8635—Walls made by casting, pouring, or tamping in situ made in permanent forms with ties attached to the inner faces of the forms

Definitions

• the invention relates to a lattice girder-like reinforcement structure for a concrete slab, with two spaced apart flat webs of the same width and with these connecting bars welded laterally to the flat webs, in particular in the form of loop coils, a formwork panel being fastened on both sides parallel to the flat webs on the reinforcement structure and using such Reinforced structures made of slab elements
• the two formwork panels are kept spaced from each other by the aforementioned lattice girder-like reinforcement structures.
• the reinforcement structures have a rectangular cross-sectional shape, with the lattice bars connecting the two longitudinal webs of flat strips defining the narrow sides of the rectangle, to which the formwork panels are attached in a fitting manner. Since it is not possible to completely wrap the flat belts in concrete, the rust-proof screws inserted from the outside protrude into the filling space to prevent the formwork panels from loosening if the flat belts rust through and protrude directly into the concrete.
• the AT-PS 311 627 describes a reinforcement for walls, which consists of a corrugated mat part and perpendicular to a ladder whose rods protrude for fixing mutually attachable grids beyond the wall thickness specified by the expansion of the mat part.
• the grids are provided with shotcrete, so that a formwork element is created that can be filled with concrete.
• Such reinforcement with a one-sided grid can also be used for ceiling slabs, since all metal parts are ultimately encased in the concrete.
• a similar construction of a wall is also described in DE-OS 27 22 711, the inner cavity not being filled with concrete.
• metal grids are arranged to form a rectangular column, to which two bow coils are attached on the side, which protrude laterally beyond the grid columns.
• the protruding vertices of the temple snakes penetrate sheets of foamed polystyrene and serve for the external fastening of meta-lattices which are embedded in shotcrete, the polystyrene sheets serving as formwork towards the cavity.
• At least roof tiles can also be produced in the same width.
• the invention has therefore set itself the task of creating a reinforcement structure, with the help of which not only wall formwork elements for the sheath concrete construction according to DE-PS 32 14 502 but also ceiling shell elements can be quickly and easily manufactured, their installation and completion to wall or Ceiling slabs can be achieved just as quickly and easily while protecting the main reinforcement parts against corrosion.
• the reinforcement structure has protruding parts on both sides of the flat webs, which the Distance the slat plate from the flat webs in a dimension that allows a concrete covering of the flat webs.
• the protruding parts of the reinforcement structure prevent direct contact of the formwork panels with the flat webs, which can be fully embedded when the concrete is poured in, thereby also achieving corrosion protection. Due to the complete concrete embedding of the Ftachstege reinforcement structures according to the invention can now be used not only for the reinforcement of wall panels but also of ceiling panels, whereby a significant simplification can be achieved since the formwork element for the ceiling, with the exception of the upper formwork panel, can correspond to that for the wall.
• the spacing parts can comprise end sections of the lattice bars, in particular the apices of the temple snakes, to which the shell plates can be placed.
• a reinforcement structure of this type accordingly contains flat webs which are offset inwards with respect to the apexes of the temple coils, the formwork panels resting essentially only in punctiform fashion on the apices of the temple coiler, so that no additional rust protection of the anti-surfaces is required.
• the protruding parts comprise the side webs complementing the flat webs to U-profiles, on the free longitudinal edges of which the formwork panels can be placed.
• the distance of the formwork panel from the flat webs is determined by the width of the side legs, the free longitudinal edges of which could optionally be provided with a cover, for example a U-shaped plastic profile.
• individual spacers can of course also be attached to the flat webs, so that punctiform contact surfaces can also be achieved here.
• Reinforcement structures according to the invention can moreover have both side legs protruding from the flat webs and lattice bars projecting beyond the side legs, which is particularly advantageous if these are formed by loop coils, so that their apex in turn protrude.
• the free longitudinal edges of the side legs and the apex of the temple snakes then delimit openings that can also be used to anchor the formwork panels, as will be explained later.
• the distance between the inner surface of the formwork panels and the flat webs is preferably between 15 mm and 50 mm, so that the concrete covering is secured.
• a further preferred embodiment which improves the stability of the reinforcement structure, provides that the two loop serpents are arranged offset in the longitudinal direction by half the leg distance.
• additional reinforcement bars can be welded to the outer sides of the lattice bars or the bracket coils in the area of the lower flat web, which serves as tension reinforcement, during installation.
• a further embodiment of the reinforcement structure can also be used as ceiling slab reinforcement, in which the apexes of the bracket coils protruding on one side are bent outwards.
• the easily accessible, outwardly bent bow snake crown can be attached directly to the formwork panel.
• a plate-shaped wall formwork element for the shell concrete construction comprises, as mentioned at the outset, a plurality of lattice girder-like reinforcement structures which are parallel to one another are arranged, and on the projecting parts on both sides, in particular, lost formwork panels rest at a distance from the two flat webs. They are fastened by means of a fastener having a head, which are inserted from the outside through the formwork panel and a flat web, so that the end thereof projects into the space between the two flat webs. The ends are thus integrated directly into the concrete.
• the fasteners are formed by rustproof screws with a drill bit s in d, favorable if each screw has a thread-free section following the head, the length of which approximately corresponds to the threaded section with the drill bit, whereby the length of both sections corresponds approximately to the distance between the formwork panel and the flat web.
• Screw can be used directly from the outside, since it first drills or screws with the drill tip and the threaded section through the formwork plate, and then, however, when drilling the hole in the flat strip, it disengages from the thread cut into the formwork plate, since this then only shoots around the unthreaded section.
• its length which also corresponds to the distance, also ensures that the thread-free section cannot penetrate the flat web, since the screw head lies in the formwork plate beforehand, so that the thread engagement with the flat web is maintained.
• a further embodiment of a plate-shaped wall formwork element for the sheath-concrete construction with reinforcement structures according to the invention and formwork panels lost on both sides provides that each formwork panel which has slits penetrated by the apices in the region of the curved apexes of the reinforcement structure of the reinforcement structure, on the free longitudinal edges of the side legs of the U-profiles is attached tightly.
• the formwork panels can only be fixed by screwing to the flat webs, but is also possible using split pins, which are inserted on the outside into the above-mentioned openings between the crowns and the side legs.
• the formwork panels can have a thickness corresponding to the protrusion of the apex of the temple snakes over the side legs, recesses on the outside being provided in the formwork panels for inserting the split pins.
• ceiling formwork elements which have a formwork panel only on the underside. These, in turn, rest on the protruding parts of the lattice bars or bow coils, and are fixed by fastening elements, in particular the self-drilling screws, which extend from the outside through the formwork plate and the flat webs and protrude into the space between the two flat webs, in which they directly in the
• the spaced-apart arrangement of the formwork panels ensures the necessary concrete covering of the flat web serving as tensile reinforcement and the additional reinforcing bars. If the aforementioned reinforcement structures with the curved serpentine crests on one side are used for the production of slab formwork elements, a preferred embodiment provides that a lost formwork plate is clipped to the curved outer crests of the curved serpentines. If clamps are used for this, the legs of which are longer than the formwork panels and which have ends that are chamfered outwards, they bend backwards when clipped when the formwork panel is placed on a suitable support, for example a steel plate. The clips are therefore tear-resistant in the Anchored formwork panel.
• Ceiling formwork elements preferably have 3 to 4 lattice girders per slab.
• displacement bodies made of a light material, such as polystyrene foam, can be fastened on the formwork panel between these.
• the formwork panels themselves can also consist of foamed polystyrene.
• Another version provides formwork panels made of cement-bound wood wool panels.
• the self-drilling screws mentioned above are designed for the fastening of the formwork panels so that the screw widens concavely at the transition area between the unthreaded section and the head, the generatrix of the concavely curved transition area being formed by a section of a conical section line.
• the conical section line By choosing the conical section line, a shape of the transition area can be achieved which, depending on the thread height of the screw, the drilling speed and the material of the formwork plate, causes a steadily increasing material displacement with the most vertical possible force transmission into the formwork plate.
• Another preferred embodiment provides that the tool receiving recess of the screw merges into a recess that can be gripped behind, into which a push-button-like extension of a screw head cover plate can be snapped.
• FIG. 1 shows an oblique view of a wall formwork element
• FIG. 2 shows a section of a ceiling formwork element in an oblique view
• FIG. 3 shows a horizontal section through the reinforcement area of the wall formwork element according to FIG. 1
• FIG. 4 shows a horizontal section similar to FIG. 3 through another 5 shows a vertical section through a ceiling formwork element according to FIG. 2
• FIG. 6 shows a section similar to FIGS. 3 to 5 through a further embodiment
• FIG. 7 shows in longitudinal section two fastening areas of the embodiment according to FIG. 3 or 5 8 shows an axial section through two different designs of the transition area between screw shaft and screw head
• FIGS. 9 and 10 sections through a further exemplary embodiment of a ceiling formwork element
• FIG. 11 shows a schematic front view of a ceiling formwork element with a displacer .
• a reinforcement structure 1 consists of two flat webs 2, 3, in particular sheet metal strips, which are arranged parallel to one another and are connected to one another by laterally welded-on bars 4, in particular bow coils.
• the lattice bars 4 protrude beyond the flat webs 2, 3 on both sides, so that they form parts which protrude from them, for example apex 5 of the bending lines.
• the flat webs 2, 3 are supplemented by side legs 18 to form U-profiles, the open sides of which face outwards, the bars 4 or their apex 5 also projecting beyond the side legs 18. Openings 15 remain free between the apexes 5 and the longitudinal edges 16 of the side legs 18.
• the protrusion of the bars 4 or the width of the side legs 18 is a dimension a, which corresponds at least to the minimum thickness of the concrete covering of the flat webs 2.3, and is preferably between 15 mm and 50 mm. If reinforcement structures 1 according to the invention are provided with formwork panels 7, 10, 20, so that wall and ceiling formwork elements result therefrom, the protruding parts prevent direct contact with the outside of the flat webs 2, 3, whereby the concrete coating is achieved when the concrete is filled.
• Wall formwork elements for example according to FIG. 1, are produced by arranging a plurality of reinforcement elements 1 at the desired spacing from one another, then placing a formwork plate 7 thereon and fastening them by means of screws 14, turning through 180 ° and placing and fastening the second formwork plate 7.
• the formwork panels 7 lie against the ends of the lattice bars 4 and the apexes 5 of the bow coils while maintaining the dimension a relative to the roof web 2,3.
• Screws 14 with a head 25, a subsequent thread-free section 8 and a threaded section 9 ending in a drill tip, each of which has a length approximately corresponding to dimension a, are inserted from the outside through the formwork plate 7 and the flat web 2.
• the threaded portion 9 leaves the formwork plate 7 before drilling the hole in the flat web 2, so that the formwork plate 7 cannot be damaged.
• the screw 14 is screwed (Fig.
• the head 25 of the screw 14 can also be covered by a plate 28, which is snapped into the tool holder recess of the head 25.
• a recess 26 provided with a constriction, which can be gripped behind, adjoins the tool receiving recess.
• a push-button-like extension 29 of the plate 28 is snapped into this.
• the head 25 is countersunk by the thickness of the plate 28 into the formwork plate 7, 10, 20, so that after inserting the plate 28, it lies flush in the surface of the formwork plate 7, 10, 20.
• the generatrix of the concave transition region 27 provides a section of a conic section line, for example one Ellipse or a parabola.
• Fig. 8 two different designs of the transition area 27 are shown, the left half of the transition area in the drawing using screws 14 with an enlarged head diameter for formwork panels 10, 20 from less pressure-resistant, the right half in the drawing Screws 14 for 7 formwork panels made of higher pressure-resistant material is used.
• the curvature of the generatrices represents a transition curve that causes a steady increase in the material displacement, whereby the forces should be introduced at any point perpendicular to the surface of the material to be displaced.
• the material came to be compacted in the area surrounding the screw head without damage, thereby achieving maximum protection against pulling out.
• a second embodiment of a wall formwork element is shown in section.
• formwork panels 10 for example made of foamed polystyrene, are provided with slots 17 in the region of the apex 5, so that they can be pushed in until they rest against the longitudinal edges 16 of the side legs 18. In this installation position, the distance to the flat web 2, 3 required for the concrete encapsulation remains.
• the formwork panels 10 are fastened by means of split pins 12, which are located in recesses 11 on the outside of the formwork panels 10 and are inserted into the openings 15.
• the reinforcement structure 1 is provided with a tensile reinforcement reinforced by reinforcement bars 6, which are welded to the outside of the bars 4 at the level of the flat web 2.
• the concrete coating is also secured by the distance a to the formwork panel 7.
• FIG. 6 shows a formwork panel 10 made of heat-insulating material, in particular foamed polystyrene, which is inserted similarly to the embodiment of FIG. 4 until it rests against the side legs 18, and a formwork panel 7 which bears against the tops 5 of the loop coils, which in turn is by means of the flat web 2 penetrating screws 14 is fixed.
• a formwork element can also be used both as a wall and ceiling formwork element.
• FIG. 9 shows a longitudinal section through a ceiling formwork element which has a formwork panel 20 made of cement-bound wood wool.
• a reinforcement structure 1 is fixed, in which the apex 5 of the loop snakes are offset in the longitudinal direction.
• FIG. 10 which shows an offset section through a lower apex in each case, the lower apices 5 of the loop coils are provided on sections 21 bent outwards and fastened in the formwork plate 20 by means of clips 22.
• the formwork plate 20 is placed on a base plate 24, for example a steel plate, during the manufacture of the ceiling element, and the clips 22 are pressed in by means of a device, not shown.
• the beveled ends 23 of the clamp legs are bent outwards and upwards on the base plate 24, so that the clamps 22 are firmly anchored.
• the outwardly bent section 21 of the loop snakes the setting of the brackets 22 is eased Lich essential.
• the webs 2, 3 are formed by U-shaped profile areas, the legs of which protrude inwards and the transverse ends of which are domed in the transverse direction.
• FIG. 11 shows a schematic end view of a ceiling formwork element, in which a displacement body 30, in particular made of foamed polystyrene, is arranged, preferably glued, between the two reinforcement structures 1 screwed or clamped onto the formwork plate 7, 10, 20. 9 to 11, for the sake of clarity, additional reinforcing bars 6 have been omitted for the tensile reinforcement.

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• Engineering & Computer Science (AREA)
• Architecture (AREA)
• Physics & Mathematics (AREA)
• Electromagnetism (AREA)
• Civil Engineering (AREA)
• Structural Engineering (AREA)
• Forms Removed On Construction Sites Or Auxiliary Members Thereof (AREA)
• Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)

Priority Applications (5)

Applications Claiming Priority (2)

Publications (1)

Family

ID=3516580

Family Applications (1)

Country Status (6)

Cited By (2)

Families Citing this family (3)

Citations (3)

Family Cites Families (1)

• 1989
  • 1989-06-19 AU AU37770/89A patent/AU3777089A/en not_active Abandoned
  • 1989-06-19 EP EP89906545A patent/EP0422034B1/de not_active Expired - Lifetime
  • 1989-06-19 HU HU402289A patent/HU206903B/hu not_active IP Right Cessation
  • 1989-06-19 RU SU894894283A patent/RU2053334C1/ru active
  • 1989-06-19 WO PCT/AT1989/000060 patent/WO1989012722A1/de active IP Right Grant
• 1993
  • 1993-11-30 LV LVP-93-1281A patent/LV11201B/lv unknown

Patent Citations (3)

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