JPH0967899A - Reinforcement cage and assembling method therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To remarkably increase the efficiency of reinforcement arrangement works for hoops arranged around main reinforcements and hence increase the workability of reinforced concrete columns including SRC structures. SOLUTION: A reinforcement cage is constituted of a group of hoops 200 in which L-shaped hoops 20 to be arranged around a group of main reinforcements composed of a plurality of main reinforcements, are arranged in one direction at every specified distance and fixing reinforcements 30 mutually fixing respective hoops 20. And bends 21, 22 to hook main reinforcements are formed respectively at both ends of respective hoops 20.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a technique for assembling a reinforcing bar when constructing a column made of reinforced concrete, and can be effectively used particularly for improving the workability of assembling an L-shaped hoop arranged around the main bar. It is about technology.

[0002]

BACKGROUND OF THE INVENTION In the construction of reinforced concrete columns, the main bars of the columns are assembled, the hoops are arranged around the main bars (main bar group), and other necessary reinforcing bars are laid out, and then the form frame for the columns is formed. It is a common practice to assemble concrete and pour concrete into the formwork for construction. In that case, as the hoop, a ring-shaped hoop as shown in FIG. 4 is usually used, and a large number of hoops are arranged at intervals in the length direction of the main bar 1 (column height direction).

When the pillar to be constructed is a square pillar, these hoops 2 are arranged so as to surround a main bar group consisting of a plurality of main bars 1 arranged so as to be located at the corner portion of a plane quadrangle. However, in consideration of workability of the reinforcing bar, the reinforcing bar for the hoop 2 is bent into a quadrangle, and both ends thereof are hooked on the main bar 1 and bent inward.

[0004]

In the rebar assembling work, the number of hoops is very large, and for example, even a medium-sized building may have hundreds to thousands of hoops. Therefore, it takes a lot of time and labor to arrange the large number of hoops one by one at a predetermined interval. Moreover, for the placement work of those hoops,
There are many processes such as so-called distribution, pitch division, and mounting, and all of them are on-site work, so the work efficiency is very poor.

From the point of view of improving the work of assembling reinforcing bars on site, for example, most of the reinforcing bars required for the length (height) of one floor of a column made of reinforced concrete are
A method may be considered in which a pillar rebar unit is integrally assembled in advance near the site or in a factory, and the pillar rebar unit is hung and installed at the site by using a heavy machine such as a crane. However, this method is often inconvenient. The reason is that firstly, the number of welding points for connecting the column rebars and the beam rebars increases, and secondly, the column rebar unit itself becomes heavy, so that it is necessary to suspend and assemble it. It requires large heavy equipment. These problems are also the same when constructing steel-framed reinforced concrete (SRC) columns. In addition, in the case of SRC construction, from the viewpoint of efficiency of rebar assembly work,
In the field, it is usual to take the step of arranging the hoop after welding work between the main reinforcements of columns and the main reinforcements of beams. Therefore, if it is simply a pillar rebar unit, the workability is rather deteriorated.

[0006]

SUMMARY OF THE INVENTION The present invention has been made in consideration of the above points, and in particular, the efficiency of the work of arranging the hoops arranged around the main muscles can be markedly improved. It is an object of the present invention to provide a technique capable of improving the workability of reinforced concrete columns including structures.

[0007]

According to the present invention, a reinforced concrete basket K is used which is divided into a plurality of reinforced concrete columns to be constructed in the lengthwise direction and is arranged in each divided area. This rebar cage K is a hoop group 200 in which L-shaped hoops 20 to be arranged around a main bar group composed of a plurality of main bars 10 are arranged in one direction at predetermined intervals, and a fixing for fixing each hoop 20 to each other. And a muscle 30. Then, bent portions 21 and 22 for hooking on the main muscle 10 are formed at both ends of each hoop 20, respectively. Therefore, in the rebar cage K having such a configuration, a large number of hoops can be arranged at one time only by preparing a plurality of them and attaching them around the main bar group. In that case, since the bent portions 21 and 22 for hooking and attaching to the main muscle 10 are provided at both end portions of each hoop 20, the hoop 20 can be attached in a stable state.

When the column to be constructed is a quadrangular prism, the main reinforcement group consisting of the plurality of main reinforcements 10 is usually composed of at least four main reinforcements located at the corner portion of the square plane.
Therefore, it is preferable that the hoop 20 has an L-shape having a shape obtained by dividing the hoop 20 into two in the diagonal direction of the plane quadrangle.
This is because it is easy to perform the work of arranging the rebar cages K facing each other with respect to the main bar group, and moreover, the most preferable form for hooking the bent portions 21 and 22 of each hoop 20 to the corresponding main bar 10. Because it will be.

On the other hand, in the assembling method of the present invention, the reinforced concrete pillars to be constructed are divided into a plurality of columns in the lengthwise direction, and the plurality of main bars 10 A hoop group 200 in which L-shaped hoops 20 to be arranged around the main muscle group consisting of are arranged in one direction at predetermined intervals, and a fixed muscle 30 for fixing each hoop 20 to each other. Bent portions 21 and 22 for hooking on the main muscle 10 at both end portions of the
It is characterized by assembling each of those formed through the following steps. A First step of assembling the rebar cage K outside the form of the pillar portion. B The rebar cages K assembled in the first step are used as a set of two, and each rebar cage K is positioned so that the main rebar group is sandwiched from the outside, and each hoop 20 of each rebar cage K is positioned.
The bent portions 21 and 22 of each of the main muscles 10 corresponding to the main muscle group.
Second step to hook and attach to. Since the rebar cage K is assembled outside the form, for example, by assembling it near the factory or on-site, not only the workability is improved and the construction period is shortened, but also the accuracy of the hoop reinforcement is improved. Also, each hoop 2 of each rebar cage K
The bent portions 21 and 22 of 0 correspond to the respective main muscles 1 of the main muscle group.
Since it is hooked on 0 and installed, the installation work is easy.

Here, considering the workability of attaching the rebar cage K, when performing the second step, one of the bent portions 21 and 22 of each hoop 20 of the rebar cage K on one end side is bent.
It is preferable to hook 1 on each main muscle 10 and then bend the main muscle 10 when hooking the bent portion 22 on the other end side to another main muscle 10.
By doing so, the rebar cage K can be attached by a simpler operation.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION Preferred embodiments of the present invention will be described below with reference to the accompanying FIGS. FIG. 1 is a perspective view of a rebar cage, FIG. 2 is a perspective view showing an assembling procedure thereof, and FIG. 3 is a plan view in a state where it is attached to a main bar. The illustrated example shows an example in which the present invention is applied when constructing an SRC column.

In these figures, a reinforcing bar cage designated by reference character K is a hoop group 200 in which L-shaped hoops 20 to be arranged around a main bar group consisting of a plurality of main bars 10 are arranged in one direction at predetermined intervals. , And a fixing muscle 30 for fixing each hoop 20 to each other. Then, bent portions 21 and 22 for hooking on the main muscle 10 are provided at both end portions of each hoop 20.
Are formed respectively. In consideration of weight reduction and the like, the fixed muscles 30 each have a smaller diameter than the hoop 20 in terms of strength. Bends 2 at both ends of each hoop 20
Nos. 1 and 22 are bent to such an extent that they can follow the outer surface of the main bar 10, and the angle formed with the linearly extending tip is 4
It is set around 5 degrees. That is, it means that bending is performed around 135 degrees.

The length of the rebar cage K is shorter than the length of the column to be constructed, for example, about 2 m, in consideration of easy handling. Therefore, the pillar to be constructed is divided into a plurality of pieces in the lengthwise direction and arranged in each divided area as a unitized rebar cage K. Further, the size of each hoop 20 itself is, as shown in FIG. 3, located at the corner portion of the plane quadrangle when facing each other.
The size is set so that the main muscle group including the main muscles 10 of the book can be surrounded. Therefore, it has an L shape which is divided into two in a diagonal direction of a plane quadrangle, and has bent portions 21 and 22 formed at both ends thereof. This size naturally depends on the size around the main muscle group. FIG.
In FIG. 3, reference numeral 50 indicates a steel frame when constructing an SRC column.

FIG. 2 shows a work procedure for attaching the rebar cage K to the main bar 10. As shown in FIG. 2, the rebar cages K preassembled in a factory or the like are used as one set, and the rebar cages K are positioned in such a manner that the main bar group is pinched from the outside, and each rebar cage K is positioned. Each hoop 20
The bent portions 21 and 22 of each of the main muscles 10 corresponding to the main muscle group.
To attach it. At that time, rebar cage K
Of the bent portions 21 and 22 of each hoop 20, the bent portion 21 on one end side is hooked on the main muscle 10 respectively, and then, when the bent portion 22 on the other end side is hooked on another main muscle 10, Is preferably curved. By doing so, the rebar cage K can be attached by a simpler operation. In addition, when the reinforcing bar cage K is attached at a middle portion in the height direction of the main bar 10 that has already been laid out, the main bar 10 can be easily bent, which improves workability. In that case, the attached rebar cage K may be arranged at a predetermined position so as to be dropped downward.

In the embodiment, the present invention is applied to the case of constructing the column of SRC structure having the steel frame 50 at the central portion, but of course, the same is applied to the case of RC structure. it can. Rather, it can be said that the RC structure is preferable as the usage form of the reinforcing bar cage K. This is because the rebar cage K can be made relatively lightweight, and it is not necessary to use a large heavy machine or the like.

[0016]

As described above, according to the present invention, it is possible to remarkably improve the efficiency of the work of arranging the hoops arranged around the main bar, which allows the construction of reinforced concrete columns including SRC structures. It is possible to improve the property.

[Brief description of drawings]

FIG. 1 is a perspective view of a reinforcing bar basket showing an embodiment of the present invention.

FIG. 2 is a perspective view showing a procedure for assembling a rebar cage.

FIG. 3 is a plan view showing an embodiment of the present invention.

FIG. 4 is a plan view showing a bar arrangement state of a conventional hoop.

[Explanation of symbols]

 K Reinforcing bar cage 10 Main muscle 20 Hoop 21, 22 Bending part 30 Fixed muscle 200 Hoop group

Claims (4)

[Claims] 1. A unitized reinforcing bar basket in which a reinforced concrete column to be constructed is divided into a plurality of columns in the lengthwise direction and arranged in each divided area, and the columns are arranged around a group of main bars composed of a plurality of main bars. A hoop group in which power L-shaped hoops are arranged in one direction at predetermined intervals, and a fixed muscle for fixing each hoop to each other, and a bent portion for hooking to the main muscle is provided at both end portions of each hoop. Reinforcing bar cage characterized by being formed respectively. 2. The main reinforcement group is composed of at least four main reinforcements located in a corner portion of a plane quadrangle, and the hoop has an L shape divided into two in a diagonal direction of the plane quadrangle.
The rebar cage according to claim 1, which is shaped. 3. A reinforced concrete basket to be constructed, which is divided into a plurality of columns in the lengthwise direction and is arranged in each divided area, and is a unitized reinforcing bar basket, which is arranged around a group of main bars composed of a plurality of main bars. A hoop group in which power L-shaped hoops are arranged in one direction at predetermined intervals, and a fixed muscle for fixing each hoop to each other, and a bent portion for hooking to the main muscle is provided at both end portions of each hoop. Each formed,
An assembling method characterized by assembling through the following steps. A First step of assembling the rebar cage outside the form of the pillar portion. B The rebar cages assembled in the first step are used as a set of two, and while positioning the main rebar cages from the outside by the rebar cages, the bent portions of the hoops of the rebar cages are positioned to the main rebar cages. The second step of hooking and attaching to each main bar. 4. When performing the second step, of the bent portions of each hoop of the rebar cage, the bent portion on one end side is hooked on the main bar, and then the bent portion on the other end side is bent on the other main bar. When you hook it on, bend the main muscle,
The assembling method according to claim 3.