JP2003293503A - Reinforcement arrangement structure containing void form - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce the number of fixed works to a floor form of void forms. <P>SOLUTION: Truss reinforcing bars 10 connecting an upper main reinforcing bar 11 to a lower main reinforcing bar 12 with a diagonal reinforcing bar 13 are fixed on a slab floor form 3 at a required interval in parallel with the void form. A void unit 20 is set between the truss reinforcing bars 10, the void unit 20 is formed by arranging the void forms 1 on a reinforced cage 21 to fix, a hold-down frame 5 is assigned to the upper surface of the cage, both end locking bars 5a are locked with the truss reinforcing bars 10, and an uplift movement resulting from concrete casting is prevented. When the void forms 1 are fixed through the truss reinforcing bars 10 long arranged on the floor form 3, each truss reinforcing bar 10 fixes at least both ends thereof to the floor form to prevent the uplift movement resulting from the concrete casting, and when the void forms 1 are locked with the reinforcing bars 10, the void forms 1 are also fixed to the floor form 3. Then, when the void forms 1 are easily locked with the truss reinforcing bars 10, workability is promoted. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reinforcing structure with a void form and a reinforcing method for constructing a hollow slab.

[0002]

2. Description of the Related Art A slab S of a reinforced concrete type structure such as an apartment house shown in FIG. 9 is generally a hollow slab structure having a void formwork 1 therein from the viewpoints of light weight, reduction of beams and sound insulation. Is. The hollow slab structure is constructed by fixing the void formwork 1 on the slab floor formwork together with the reinforcements such as upper and lower main rebars, and placing concrete in the reinforcement structure containing the void formwork 1.

When pouring concrete, it is necessary to fix the void form 1 to the floor form in order to prevent the void form 1 from being fixed and floating. As the fixing means, in JP-A-10-131494, as shown in FIG. 10, each void form 1 is fixed to the floor form 3 by its fixing tool 2, or as shown in FIG. The void form 1 is arranged in the cage-shaped rebar 4, and the rebar 4 is fixed to the floor form 3 by the fixture 2. The fixture 2 shown in FIG. 10 is one in which the void formwork 1 is placed on the pedestal 2a and fixed by the number lines 2b, and the fixing plate (wedge) 2d is locked to the legs 2c penetrating the floor formwork 3. The fixture 2 shown in FIG. 11 is one in which the leg 2e locked to the reinforcing bar 4 at the hook-shaped end portion penetrates the floor formwork 3 to lock the fixing plate 2d.

[0004]

The conventional fixing of the void formwork 1 to the floor formwork 3 in FIG. 10 requires two fixing tools 2 for each void formwork 1, In the case of the one shown in FIG. 11, four cage-shaped rebars 4 are required, and the fixing work is required for each (see FIG. 8 described later). The number of fixing works is large, which is very complicated and the workability is poor.

An object of the present invention is to reduce the number of operations for fixing the void formwork to the floor formwork.

[0006]

In order to achieve the above object, the present invention is to fix a void formwork to a floor formwork through a reinforcing bar that is longly arranged on the floor formwork. .
By fixing at least both ends of floor reinforcements to the floor formwork, it is possible to prevent floating due to concrete pouring.If the void formwork is locked and fixed to the reinforcements, the void formwork will also become the floor. It is fixed to the formwork. At this time, the number of fixing points of the reinforcing bar is less than that of fixing each void form or void unit (see Fig. 8), and it is easy to lock the void form to the reinforcing bar. If so, the workability is improved.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION As an embodiment of the present invention, main rebars in which parallel upper main rebars and lower main rebars are connected by vertical rebars and integrated are arranged in parallel on a slab floor formwork at a required interval. It is installed and fixed, and a void unit is provided between each main rebar.The void unit is a cage made of rebar with a void form frame arranged and fixed, and the locking bar protruding from the side surface of the cage. However, it is possible to adopt a configuration in which the main rebar is locked to prevent lifting due to concrete pouring.

In this structure, the locking end may be in any form as long as it fixes the void unit to the main reinforcing bar, and it may be composed of a reinforcing bar different from the void unit or the arrangement of the void unit as in the embodiment described later. It is possible to consider an appropriate mode such as a structure of muscles.

Further, in the case where the void form has a long pipe-like or columnar shape, the long void form has its ends between the main rebars at required intervals in the longitudinal direction. It is possible to employ a configuration in which the upper main rebar and the lower main rebar are fitted by being installed, and the fitting prevents the void form frame from being lifted up due to concrete placement.

Further, regardless of the shape of the void form, the upper reinforcing bar and the lower reinforcing bar have their ends between the respective main reinforcing bars at the required intervals in the lengthwise direction thereof. It is erected by inserting it between, and the void form is arranged between the upper and lower rebars, the lower rebar is in contact with the lower main rebar, the upper rebar is in contact with the upper main rebar, and by the contact, It is possible to adopt a configuration in which the void formwork is prevented from being lifted up by placing concrete through the upper rebar.

The main reinforcing bar has one upper main reinforcing bar and two lower main reinforcing bars arranged at the positions of the long sides of the triangular prism, and diagonal reinforcing bars are respectively provided between the upper main reinforcing bar and both lower main reinforcing bars. It is a triangular column-shaped truss rebar provided, the diagonal rebar has a waveform that stands obliquely from the lower end, bends at the upper end, and repeats standing up at the lower end. With the welded structure, it is possible to obtain a reinforcing bar having a high strength due to the truss structure, and the reinforcing work is facilitated.

When constructing these reinforcing structures with void formwork, after fixing the main rebars to the slab floor formwork, the void unit, the void formwork or the upper and lower rebars and the void formwork are placed between the main rebars. It is good to arrange. This is because it is easier to fix the main rebar to the floor form and workability is better without the void form unit. Further, the main rebar, the void form, etc. may be welded to each other after they are arranged, and may be integrated by a number line or the like.

[0013]

EXAMPLE An example is shown in FIGS. 1 to 4a and 4b,
In this embodiment, triangular truss rebars 10 and void units 20 are arranged in parallel on the slab floor formwork 3 at a required interval.

The triangular column truss rebar 10 includes one upper main rebar 11 and two lower main rebars 1 at the positions of the long sides of the triangular column.
2 and 12 are arranged, and diagonal reinforcing bars 13 are provided between the upper main reinforcing bar 11 and both lower main reinforcing bars 12, respectively. The oblique reinforcing bar 13 has a waveform that stands obliquely from the lower end, bends at the upper end, and repeats standing at the lower end, and is welded to the upper main reinforcing bar 11 and the lower main reinforcing bar 12 at the upper end and the lower end, respectively.

The void unit 20 is formed by fitting a void form frame 1 composed of a cylindrical steel pipe, a spiral thin-walled steel pipe, a foamed resin cylinder, etc., into a rebar cage 21 and welding or tightening the wire.

This truss rebar 10 and void unit 2
In order to form a rebar with void form with 0, as shown in FIG. 1, truss rebars 10 having the width of the void unit 20 are arranged in parallel on the floor form 3, and the truss rebar 10
Is fixed to the floor formwork 3 by the fixture 2 in the same manner as in the conventional case. At this time, as shown in FIG. 3, the receiving frame 2a of the fixture 2
Is designed to receive the lower main reinforcing bar 12 of the truss reinforcing bar 10.
The truss rebar 10 can be fixed after the appropriate post-processes such as the void unit 20 are completed.

When the arrangement and fixing of the truss rebar 10 is completed,
The void units 20 are arranged between the truss reinforcing bars 10 at required intervals in the length direction. As shown in FIGS. 4a to 4b, the arrangement is such that the void unit 20 is placed between the lower main reinforcing bars 12 inside the adjacent truss reinforcing bars 10 and the locking bars 5a projecting from above the side surface of the void unit 20.
The presser bar rebar 5 having the upper main bar 11 of the truss rebar 10,
The void unit 20 is fixed to the truss rebar 10 by being bridged (installed) on the lower side of 11 spaces. The presser bar 5 can be integrated with the void form 20 by welding or the like. In the case of the integrated bar, a part of the reinforcing bar of the reinforcing bar cage 21 constituting the unit 20, for example, the reinforcing bar 21 of FIG.
By extending a to the side, the protruding bar 5a of the presser bar 5
Can be formed.

When the necessary truss reinforcements 10 and void units 20 have been placed on the floor form 3, other reinforcements are performed as necessary to construct a reinforcement structure containing the void form 1,
Concrete C is placed in the structure and hollow slab S
To build. Since the void unit 20 is fixed to the truss rebar 10 at the time of its placement, the void form 1 does not rise.

In the above-mentioned embodiment, the void form 1 is arranged by the void unit 20, but the void form 1 may be individually arranged between the truss rebars 10. For example, in FIG.
As shown in FIG. 3, the lower rebar 6 is bridged between the lower main rebars 12 of the truss rebars 10, 10 and the void form 1 is arranged at the required position, and the upper rebar (presser foot) is placed on the void form 1. (Reinforcing bar) 5 can be placed and bridged between upper main reinforcing bars 11 of truss reinforcing bar 10. Further, as shown in FIG. 6, the elongated void form 1 can be bridged between the truss reinforcing bars 10 and 10.

In each of the above embodiments, the triangular column truss rebar 1
By 0, parallel main upper and lower main rebars were connected by vertical rebars to form an integrated main rebar.
The shape is arbitrary as long as it is a main rebar having a configuration capable of fixing the void mold 1 by inserting 0, the presser bar 5, the protruding bar 5a, the void mold 1, etc., for example, as shown in FIG. In addition, a lower main rebar 12 having a single bar 10 'can also be adopted.

As described above, by fixing the main rebars 10 and 10 'to the floor form 3, and the void form 1 to the main rebars 10 and 10', the fixing work by the fixture 2 In the case of arranging the same number of void molds 1, as shown in FIG. 8 (a), in the case of the present invention, 30 positions are sufficient, whereas in the case of FIG. 10, it is shown in FIG. 8 (b). As shown, 23
In four places, in the case of FIG. 11, as shown in FIG.
240 locations are required, and the number of operations is reduced according to the present invention.

[0022]

As described above, according to the present invention, since the number of work for fixing the void formwork to the floor formwork is reduced, the construction speed of the reinforcing bar containing the void formwork is improved, and the fixing tool, etc. It is possible to reduce the cost by reducing the number of. In addition, the work itself can be simplified and the need for skill can be eliminated.

[Brief description of drawings]

1 shows an embodiment, (a) is a partial plan view, (b)
Is a right side view, (c) is a front view

FIG. 2 is a partial perspective view of the same embodiment.

FIG. 3 is a sectional view of a main part of the same embodiment.

FIG. 4a is a construction explanatory view of the same embodiment.

FIG. 4b is a construction explanatory view of the same embodiment.

FIG. 5 is a partial perspective view of another embodiment.

FIG. 6 is a partial perspective view of another embodiment.

FIG. 7 is a partial perspective view of another embodiment.

FIG. 8 is a comparative diagram of an example and a conventional example.

FIG. 9 is a schematic view of a hollow slab construction example.

10A is a cross-sectional view of a main part of a conventional example, and FIG. 10B is a partial perspective view of FIG.

FIG. 11 is a sectional view of a main part of a conventional example.

[Explanation of symbols]

1 void formwork 2 fixtures 3 floor formwork 4 cage-shaped rebar 5 Presser bar (upper bar) 5a protruding muscle 6 Lower rebar 10 Truss rebar (main rebar) 10 'main rebar 11 Upper main rebar 12 Lower main rebar 13 diagonal rebar 20 void units 21 Rebar Basket

Claims (5)

[Claims] 1. A main reinforcing bar 10 in which a parallel upper main reinforcing bar 11 and a lower main reinforcing bar 12 are connected by a vertical reinforcing bar 13 to be integrated, is fixed on a slab floor formwork 3 in parallel at a required interval. , A void unit 20 is provided between each main rebar 10, and the void unit 20 is a basket 21 made of rebar.
The void form 1 is arranged and fixed in the cage 21.
The reinforcing bar 5a protruding from the side surface of the void is locked to the main rebar 10 so as to prevent the floating due to the concrete pouring, and the reinforcing bar structure with a void form. 2. A main rebar 10 in which parallel upper main rebars 11 and lower main rebars 12 are connected together by vertical rebars 13 to be integrated, is fixed on the slab floor formwork 3 in parallel at a required interval. , The elongated void formwork 1 has its ends between the main reinforcing bars 10 at required intervals in the length direction thereof.
And a lower main rebar 12 are erected by being fitted, and by the fitting, the void form 1 is prevented from being lifted up due to concrete placement. 3. Main rebars 10 in which parallel upper main rebars 11 and lower main rebars 12 are connected together by diagonal rebars 13 and integrated, are fixed on the slab floor formwork 3 in parallel at a required interval. , The upper rebars 5 and the lower rebars 6 have their ends between the respective main rebars 10 at predetermined intervals in the length direction thereof.
It is installed by inserting it between 1 and the lower main rebar 12,
Moreover, the void form 1 is arranged between the upper and lower rebars 5, 6 so that the lower rebar 6 is the lower main rebar 12 and the upper rebar 5 is the upper main rebar 1
1 is abutted on the rebar 1 to prevent the void form 1 from being lifted up by concrete placing through the upper rebar 5. 4. The main rebar 10 comprises one upper main rebar 11 and two lower main rebars 12, 12 at positions of long sides of a triangular prism.
And the upper main rebar 11 and both lower main rebars 12
Is a triangular column-shaped truss rebar having diagonal reinforcing bars 13 provided between the upper and lower ends. The diagonal reinforcing bars 13 have a waveform that stands obliquely from the lower end, bends at the upper end, and repeats standing at the lower end. The upper main reinforcing bar 11 and the lower main reinforcing bar 12 are welded to each other, and the main reinforcing bars 11 and 12 are welded to each other.
The void-shaped framed rebar structure according to any one of 1. 5. When constructing the void-shaped framed rebar structure according to any one of claims 1 to 4, the main rebar 10 is used.
After fixing to the slab floor formwork 3, the void unit 20,
A method for arranging a void formwork, characterized in that the void formwork 1 or the upper and lower rebars 5, 6 and the void formwork 1 are arranged between the main rebars 10, 10.