JP2009084908A - Floor plate unit with void forms, and composite hollow floor plate - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a floor plate unit with void forms, which can prevent corrugated plates thereof from being deformed when stacked on each other, and to provide a composite hollow floor plate using the floor plate with the void forms, which is improved in strength. <P>SOLUTION: The floor plate unit with the void forms is set up by arranging the corrugated plates 5 each having a trapezoidal cross-sectional groove 4 formed therein, on a reinforced concrete plate 3 with the grooves facing downward, and therefore voids are secured on a lower side of the corrugated plates. The corrugated plate has the trapezoidal cross section, and therefore even if the floor plate units with the void forms are stacked on each other, the corrugated plates are proof against deformation in spite of the weight of the floor plate units. Further, reinforcements 1 are arranged on an upper surface of the floor plate unit with the void forms, and concrete 2 is placed on the same, to thereby constitute the composite hollow floor plate. The composite hollow floor plate thus constituted has truss structures formed therein by the corrugated plates, the concrete, etc. In this manner when an external force is applied to the floor plate, it is reduced by the truss structures, and therefore the composite hollow floor plate is proof against deformation. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a void-type floorboard unit and a synthetic hollow floorboard used as a floorboard material of the building at a construction site or the like.

A floor board material used in a building site of a building is required to have strength against a load applied to the floor board material, and to be lightweight in order to reduce the load applied to the building. As a combination of this strength and light weight, a synthetic hollow floor board having a hollow inside has been put into practical use.
In this synthetic hollow floor board, strength and light weight are achieved by providing a hollow or foamed resin material in the interior so as not to affect the strength while securing the strength by reinforcing steel and concrete as skeleton materials. ing.

  This synthetic hollow floor plate is provided with a corrugated sheet having grooves formed on a reinforced concrete plate at the manufacturing plant to secure a hollow portion on the lower surface of the corrugated plate, and a reinforcing bar is arranged on the upper surface of the corrugated plate to provide concrete. It is completed by placing. Although this completed synthetic hollow floor board may be installed at the construction site, the floor board unit with void form frame, which is a semi-finished product before the completion of the above synthetic hollow floor board, is installed at the construction site, and reinforcing bars are arranged on this. There is also a construction method in which a floor board is completed by placing and placing concrete (see FIG. 1 or FIG. 3 of Patent Document 1).

This void-type framed floorboard unit is provided with a corrugated plate fixed in a reinforced concrete plate shape, and is lighter than the synthetic hollow floorboard because the concrete has not yet been cast. Therefore, there is an advantage that transportation and installation work at a construction site are easy.
Moreover, in this structure, since a floor board acts as an aggregate | assembly of an I-shaped cross section parallel to the longitudinal direction of a hollow part, it works advantageously with respect to the load which acts on a floor board.

  In addition, there is a void-type floor board unit with a corrugated plate having a triangular cross section. (See FIG. 1 of Patent Document 2). At this time, in order to increase the volume of the hollow portion and further reduce the weight of the floor board, the plate material is bridged over two or more top portions of the triangle shape, the plate material and each top portion are connected, and each top portion is individually horizontally oriented. It may be prevented from moving (see FIG. 2 of Patent Document 2).

JP 58-080047 A JP 2002-88971 A

  These void-type frame-attached floorboard units are transported, for example, by stacking the void-type frame-attached floorboard units on a truck bed and binding them with a rope or the like. At this time, since the corrugated sheet supports the weight of the floor board unit with the void type frame stacked on the corrugated sheet and is tightened by the binding, the corrugated sheet may be deformed as shown in FIG. is there.

The method of passing a plate material to the top part of the corrugated sheet shown in Patent Document 2 and connecting the plate material and the top part is usually made by welding, and at that time, the connecting portion is made of the plate material. There is a problem that it takes time for the connecting work because it is in the shadow (on the lower surface side) and is difficult to see directly.
Further, since the corrugated sheet has a triangular cross section without providing the plate material, it can withstand deformation during stacking, but as shown in FIG. There is a risk of directly contacting and scratching the back surface. This scratch is not preferable because it can cause a crack when a load is applied after installation on a building.

  Accordingly, the present invention provides a void-shaped frame-attached floor board unit using corrugated sheets, and prevents the corrugated sheets from being deformed during stacking and transportation, and also uses the void-form frame-attached floor board unit. It is an object to increase the strength of the hollow floor board.

  In order to solve the above-mentioned problems, the present invention prevents the deformation of the corrugated plate having a trapezoidal cross-sectional shape and stacks the void-shaped frame-attached floor plate units, and includes either the upper base or the lower base of the trapezoid. In this way, the floor unit with the void-shaped frame is supported so that the back surface of the reinforced concrete plate is not damaged.

The void type framed floorboard unit is configured by placing or fixing a corrugated sheet formed by bending a single plate material on a reinforced concrete plate to form a trapezoidal groove in cross section, with the groove facing downward. It can be set as the structure which ensured the hollow part.
This trapezoid has a characteristic that deformation is hardly caused even when an external force in any of horizontal and vertical directions is applied. Therefore, even if this floor board unit with a void type frame is stacked, the corrugated sheet is hardly deformed.

In addition, after installing the floor board unit with void-shaped frame on the construction site, rebars are placed on the corrugated sheet, and concrete is placed on the corrugated board to secure the hollow part while embedding the reinforcing bars. A hollow floor board can be comprised.
In this synthetic hollow floor plate, in the arrangement direction of the hollow portions, the corrugated plate 12 and the concrete adjacent to the corrugated plate are made of a lattice material 12 (the corrugated plate 5 is a tensile member 12a and the concrete 2 is a compressed member 12b). A truss structure is formed in which the concrete 2 placed on the upper chord member 13 and the rebar 1 of the reinforced concrete plate 3 below the corrugated plate 5 is the lower chord member 14 (see FIG. 13).
Here, when a bending moment (see an arrow in FIG. 13) that causes a deflection in the synthetic hollow floor plate is generated, either a tensile stress or a compressive stress is applied to the lattice muscle constituting the truss depending on the part. However, since this lattice is comprised with the corrugated sheet (steel plate etc.) strong against a tensile stress, and the concrete strong against a compressive stress, it can oppose any stress effectively.
That is, not only the I-shaped cross section in the longitudinal direction of the hollow portion but also the truss structure in the direction in which the hollow portions are arranged effectively increases the rigidity of the synthetic hollow floor board.

Further, the corrugated sheet may be configured such that a part of the corrugated sheet is embedded in the concrete before the concrete of the reinforced concrete sheet is cured, and is fixed to the reinforced concrete sheet as the concrete is cured.
By this fixing, when placing concrete on the corrugated sheet at a construction site, there is no fear that the corrugated sheet will move on the reinforced concrete, so that the placing work can be performed smoothly.

This corrugated sheet can also be configured to have a plurality of the above-mentioned grooves in parallel.
By providing a plurality of trapezoidal grooves in this way, it is possible to reduce the weight while securing the strength of the floor unit with void type frame.

Moreover, it can also be set as the structure which provided the collar part which protrudes an outer side in each opposing edge of the said corrugated sheets paralleled.
If this flange is embedded in the reinforced concrete, this flange further secures the fixing between the reinforced concrete plate and the corrugated plate. When acted, the corrugated sheet is prevented from coming off the reinforced concrete sheet.

In addition, a fitting groove in a direction intersecting the length direction of the groove is formed on the upper surface of the corrugated plate, and a rebar is fitted into the fitting groove to connect two or more fitting grooves. You can also.
If the reinforcing bars are inserted into the fitting grooves in this way, the upper surfaces of the grooves formed in the corrugated sheet are connected. Therefore, when the floor board unit with a void type frame is stacked on the corrugated sheet, the corrugated sheet Is further suppressed from deforming.

Moreover, it can also be set as the structure which provided the at least 1 sort (s) of fiber selected from an aramid fiber, a carbon fiber, or a polyethylene fiber in the upper surface of the said corrugated sheet.
The fiber acts as a reinforcing material in the concrete due to its excellent strength characteristics. In particular, in the present invention, the truss structure is strengthened and the synthetic hollow floor plate is sandwiched between the corrugated sheet 5 and the concrete 2 and integrated. It exerts a reinforcing effect against bending stress and shear stress.

According to this invention, in the floor board unit with a void-type frame using corrugated sheets, deformation of the corrugated sheets can be prevented during the stacking, and the back surface of the reinforced concrete board can be prevented from being damaged.
In addition, the strength of the synthetic hollow floor plate using the void type frame-attached floor plate unit can be increased by the truss structure made of the corrugated plate and the cast concrete.

The floor board unit with a void type | mold frame of this invention and a synthetic | combination hollow floor board using the same are shown in FIG.1 and FIG.2, respectively.
This void type framed floorboard unit has a plurality of corrugated plates 5 in which a trapezoidal groove 4 is formed on a reinforced concrete plate 3 in which a reinforcing bar 1 is embedded with concrete 2 in parallel so that the groove 4 faces down. (See FIG. 1).
The manufacturing process of this void type framed floorboard unit will be described.

  First, the formwork 6 having an area corresponding to the area of the floor board unit with void formwork to be created is installed in a flat place.

  Next, as shown in FIG. 3, several spacers 7 made of, for example, concrete pieces are provided in the mold, and the reinforcing bars 1 are arranged on the spacers 7. At this time, instead of the reinforcing bar 1 or together with the reinforcing bar 1, a reinforcing material such as a mesh bar can be used.

  When the reinforcing bars 1 are arranged in this way, as shown in FIG. 4, the concrete 2 is placed in the formwork 6 to a depth at which the reinforcing bars 1 are hidden to constitute the reinforced concrete plate 3. This placement depth can be freely changed according to the separation distance between the reinforcing bar 1 and the corrugated plate 5 provided later. In other words, it is possible to make the placement depth shallow so that the reinforcing bar 1 and the corrugated sheet 5 are in direct contact with each other, and to increase the placement depth, the corrugated sheet 5 is disposed sufficiently away from the reinforcing bar 1. It can also be done.

  As shown in FIG. 5, the corrugated plate 5 provided on the reinforced concrete plate 3 is provided with a groove 4 having a trapezoidal cross section and a flange 8 protruding outward.

A plurality of corrugated plates 5 are arranged in parallel, and are provided along the direction of the grooves 4 on the placed concrete 2 with the grooves 4 facing downward as shown in FIG.
At this time, since the corrugated plate 8 can be embedded in the uncured concrete 2 by providing the corrugated plate 5 before the placed concrete 2 is cured, the wave is generated by the concrete 2 being cured. The plate 5 can be securely fixed.

  When the formwork 6 is removed after the concrete 2 is hardened, the floor board unit with void formwork shown in FIG. 1 is completed.

  As shown in FIG. 7, the corrugated portion 8 of the corrugated plate 5 is provided with a through hole 9 that penetrates the front and back surfaces of the corrugated plate 5 so that the uncured concrete 2 can be circulated through the through hole 9. The concrete 2 can be promptly guided to the upper surface of the flange 8. Therefore, the installation work of this corrugated sheet 5 can be performed smoothly. The number and size of the through-holes 9 can be appropriately changed within a range where the above distribution can be appropriately performed.

  Further, as shown in FIG. 8, after the corrugated plate 5 is provided on the reinforced concrete plate 3, the concrete 2 can be poured directly into the upper side of the flange portion 8. At this time, as shown in FIG. 7, the reinforced concrete plate 3 and the poured concrete 2 are integrated through the through-hole 9 provided in the flange portion 8, so that the corrugated plate 5 can be fixed more reliably.

  In the case where the lateral width of the groove 4 of the corrugated plate 5 is limited because the flange 8 provided projecting outward on the corrugated plate 5 contacts the collar 8 provided on the adjacent corrugated plate 5, It is also possible to provide the flange 8 so as to protrude inward so that the flanges 8 do not contact each other. At that time, similarly to the above, the through hole 9 can be provided in the collar portion 8 to promote the circulation.

In actual work, the floor board unit with void form frame shown in FIG. 1 is installed at the construction site, the reinforcing bar 1 is placed on the floor board unit with void form frame, concrete 2 is placed, and the floor board is placed. Can be completed.
In this case, the floor unit with the void-shaped frame is lighter than the finished synthetic hollow floor plate, so that installation work at the construction site is easy and the installation equipment to be used can be small. is there.
Further, since the corrugated plate 5 has a trapezoidal cross section, as shown in FIG. 9, when stacking and transporting a plurality of the void-type floor plate units, the weight of the lower corrugated plate 5 is weighted. Low risk of deformation.

On the upper surface of the corrugated sheet, as shown in FIG. 10, a fitting groove 10 is formed in a direction intersecting with the length direction of the groove 4 of the corrugated sheet 5, and the reinforcing bars 1 arranged on the corrugated sheet 5 are arranged on the corrugated sheet 5. It can also be fixed by fitting in the fitting groove 10.
In this way, since the external force applied to a certain groove 4 is dispersed to other grooves 4 adjacent to the groove 4 and relaxes the external force, the corrugated plate 5 is prevented from being greatly deformed by this external force. Is done.

Moreover, the synthetic | combination hollow floor board shown in FIG. 2 can also be directly installed in a building site.
In this case, it is only necessary to fix the outer edge of the synthetic hollow floor plate to the building, and the number of steps required for the work at the construction site (concrete placement and hardening) can be reduced. There is a merit that you can.

As the corrugated plate 5, as shown in FIG. 11, a single plate member can be bent to form a plurality of parallel grooves, and the flat portion 11 can be provided between the parallel grooves 4.
When the flat portion 11 is embedded in the concrete 2, the corrugated plate 5 can be reliably fixed in the same manner as the flange portion 8 is embedded in the concrete 2.
Moreover, the through-hole 9 can be formed in this flat part 11 similarly to the collar part 8, and the unhardened concrete 2 can be rapidly distribute | circulated to the upper surface of the flat part 11. FIG.

  As the material of the corrugated plate 5, a metal material such as steel having a sufficient tensile strength is preferable, but fiber reinforced plastic (FRP) or the like can be applied if there is no problem in strength.

  Since this synthetic hollow floor board has sufficient strength against external force, it can be applied not only as a floor board material but also as other building materials such as wall materials.

The perspective view which shows one Embodiment of the floor board unit with a void type | mold frame of this invention The perspective view which shows one Embodiment of the synthetic | combination hollow floor board of this invention The perspective view which shows the reinforcement arrangement | positioning in manufacture of the floor board unit with a void type | mold frame of the embodiment The perspective view which shows the placement of the concrete in the embodiment The perspective view which shows the corrugated sheet used for the embodiment The perspective view which shows fixation of the corrugated sheet to the reinforced concrete board in the same embodiment The perspective view which shows other embodiment of a corrugated sheet Sectional drawing which shows the pouring of the concrete to the collar part of the corrugated sheet in the same embodiment Sectional drawing which shows a mode that the floor board unit with a void type | mold frame of the same embodiment was piled up Perspective view showing rebar fitting to corrugated sheet The perspective view which shows other embodiment of a corrugated sheet It is sectional drawing at the time of stacking the floor board unit with a void type | mold frame from which cross-sectional shape differs, (a) is cross-sectional square shape, (b) is cross-sectional triangle shape Sectional view showing the basic structure of the truss

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Reinforcement 2 Concrete 3 Reinforced concrete board 4 Groove 5 Corrugated board 6 Formwork 7 Spacer 8 Gutter part 9 Through-hole 10 Fitting groove 11 Flat part 12a Lattice material (tensile member)
12b Lattice material (compression member)
13 Upper chord material 14 Lower chord material

Claims (5)

  On the reinforced concrete plate (3), a plurality of corrugated plates (5) in which a single plate is folded to form a groove (4) having a trapezoidal cross section are placed in parallel with the groove (4) facing downward. Alternatively, a floor board unit with a void-type frame in which a hollow portion is secured in the groove (4).   The said corrugated sheet (5) is a floor board unit with a void type | mold frame of Claim 1 made to embed a part in said reinforced concrete board (3).   A fitting groove (10) in a direction intersecting the length direction of the groove (4) is formed on the upper surface of the corrugated plate (5), and the reinforcing bar (1) is fitted into the fitting groove (10). The floor board unit with a void type | mold frame of Claim 1 or 2 which connected two or more fitting grooves (10).   The void type frame attachment according to any one of claims 1 to 3, wherein at least one type of fiber selected from aramid fiber, carbon fiber, or polyethylene fiber is provided on the upper surface of the corrugated plate (5). Floor board unit.   A synthetic hollow floor board in which concrete (2) is placed from above the corrugated sheet (5) of the void-type frame-equipped unit according to any one of claims 1 to 4, and the hollow portion is secured.

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