JPH11159143A - Setting-up method for beam-section concrete reinforcing net - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a setting-up method for a reinforcing net for placing concrete to a beam section, in which the wasteful usage of reinforcing bars is omitted and lightening and the reduction of cost are attained as far as possible and bar arrangement and the execution of works can be conducted simply without omission. SOLUTION: When the reinforcing net of a beam section is constituted, a U-shaped cage body 1, in which a fixed number of U-shaped reinforcing bars 11 for bar arrangement, which are bent in an approximately U shape, in which both end sections are mutually bent inwards and to which hooked end sections 111 are formed, are arranged in approximately parallel and each end section 112 of each U-shaped reinforcing bar 11 for bar arrangement is fixed temporarily and shaped by at least one bar 12 in the direction that the end sections 112 are crossed at right angles approximately with these side sections 112, is used. Since the bars 12 for temporary fixing fasten each side section 112 of each U-shaped reinforcing bar 11 for bar arrangement in the U-shaped cage body 1 at that time, each U-shaped reinforcing bar 11 for bar arrangement is not opened and closed by external force and intervals (t) are not made irregular, and the bars 12 for temporary fixing are not wasted because they also function as web bars.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of assembling a reinforcing bar network for forming a beam portion of a concrete building or the like. More specifically, it relates to the improvement.

[0002]

2. Description of the Related Art Conventionally, when constructing a reinforced concrete condominium or building, a rebar network at a beam portion is preliminarily assembled at a different place by attaching a U-shaped reinforcing bar and a beam rebar to a cage shape. Reinforcement pre-assembly method to install the reinforced material in the grooved beam formwork, assemble the rebar one by one directly above the beam formwork and assemble them in a cage shape, and then assemble them with a jig or crane in the beam formwork And the in-situ assembling method of assembling one U-shaped reinforcing bar in a beam formwork.

[0003] Each of these construction methods is heavy and difficult to handle by human power, requires trucks and cranes for transportation and installation, is expensive, requires a long construction period, and requires too much work for construction. Various problems such as unavoidable omission were included.

[0004] As a method for solving such a problem, a method of assembling a reinforcing bar for a beam has been proposed in Japanese Patent Publication No. 4-54686. The method uses a plurality of U as shown in FIG.
U-shaped reinforcing bars (referred to as stirrups) (u1) are arranged at predetermined intervals, and at the bottom of these U-shaped stirrups (u1), two auxiliary reinforcing bars (v) are joined at right angles to each other. U
The U-shaped cage bar (U) is pre-assembled, and the U-shaped cage bar (U) is inserted into the beam form to secure a predetermined concrete cover thickness on the U-shaped cage bar (U). Place it on the beam bottom separator appropriately placed and build it in place, and place the main bars such as the beam bottom muscle, abdominal muscle, beam top muscle, upper stirrup, and other necessary reinforcing bars in the U-shaped cage at the current position. It is incorporated by assembling.

However, since the U-shaped basket bars (U) are fixed to the auxiliary bars (v) only at the bottom of each U-shaped stirrup (u1), the U-shaped cage bars (U) have a small load during transportation and construction. Also, each U-shaped stirrup (u1) falls down, the intervals between the U-shaped stirrups (u1) vary, and the intervals become uneven, so that subsequent work is more troublesome. In addition, in the case of construction,
The auxiliary muscle (v) provided in (U) does not function as a structural member of the reinforcing bar network like the abdominal muscle, and therefore requires additional reinforcement such as abdominal muscles for construction. It has become.

[0006]

SUMMARY OF THE INVENTION The present invention provides a method for assembling a beam-reinforced concrete network in which the use of unnecessary reinforcing bars can be omitted, the weight and cost can be reduced as much as possible, and the rebar arrangement and construction can be easily performed without any omission. To provide.

[0007]

Thus, according to the invention of claim 1 of the present application, "the main body is bent substantially U-shaped and both ends are bent inwardly to form the hook-like end (111). (11
A predetermined number of the U-shaped reinforcing bars (11) formed with (1) are arranged substantially in parallel, and each side portion (11) of each of the U-shaped reinforcing bars (11) is arranged.
2) with at least one bar (1
The U-shaped cage body (1) formed by temporary fixing in 2) is placed in the beam formwork (2), and the lower main bar (3) is attached to the lower end portion (113) of the U-shaped cage body (1). ), And then fix the lower main bar (3) to the beam formwork (2).
By fixing to the lower spacers (21) group installed in the width direction at a predetermined height inside and below, the lower main reinforcement (3) is installed in the longitudinal direction in the frame and the cover height of concrete is secured appropriately. The U-shaped basket (1) is lifted, and at least two upper main bars (4) are fixed to the hook-shaped end (111) rows arranged on both sides of the upper surface of the U-shaped basket (1), respectively. After erection in the inner longitudinal direction, upper reinforcing bar between upper main bars (4) and (4)
(5) is installed by bridging each U-shaped reinforcing steel reinforcing bar (11). "

In the invention according to claim 1 of the present application,
The U-shaped reinforcing bars (11) constituting the U-shaped basket (1) are preferably arranged at equal intervals (t) from the viewpoint of uniformity of strength, but are not particularly limited thereto. Further, the U-shaped reinforcing bar for reinforcement (11), the main body is bent substantially U-shaped, and both ends are bent inward each other to form a hook-shaped end (111),
A U-shaped stirrup known in the art can be used as it is. Further, as the upper reinforcing bar (5), those known in the art can be used as they are.

At least one bar member (12) for temporary fixing provided on the U-shaped cage body (1) is used for each side (112) of the U-shaped reinforcing bar (11). Can be This bar (12)
Is used as it is as it functions as a so-called abdominal muscle.

In the present invention, at least two of the upper main reinforcements (4) are installed on the U-shaped cage (1). Top main bar
(4a) may be erected at the center of the upper reinforcing bar (5).

[0011]

According to the invention of claim 1 of the present application, first, the U-shaped basket (1) is arranged in the beam formwork (2). Then, the lower main bar (3) is fixed to the lower end (113) of the U-shaped basket (1). Thereafter, the lower main bar (3) is fixed to a group of lower spacers (21) laid in the width direction at a predetermined height below the frame, whereby the lower main bar (3) is erected in the longitudinal direction in the frame. The U-shaped basket (1) is lifted to the height of the spacer (21),
The cover thickness of concrete is secured. Then U-shaped basket
If the upper main bar (4) is fixed to each row of hook-shaped end portions (111) arranged on both sides of the upper surface of (1), each upper main bar (4) will be erected in the longitudinal direction in the frame. Each U of U-shaped basket (1)
By reinforcing the upper reinforcing bar (5) between the upper main reinforcing bars (4) and (4) erected above at the position where the reinforcing bar for character reinforcement (11) is located, the beam concrete reinforcing bar is provided. Network (A) will be assembled.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the illustrated embodiments, but the present invention is not limited thereto. Embodiment 1 FIG. 1 is a perspective view of an example of a U-shaped basket used in the present invention, and FIG.
FIG. 3 is a cross-sectional configuration diagram for explaining the assembling of a beam-shaped concrete reinforcing network using the U-shaped basket of FIG. 1 in a beam formwork;
FIG. 4 is a schematic side view showing an example of a concrete reinforcing bar network of a beam section assembled in a beam formwork, and FIG. 4 is a schematic perspective view showing an example of a reinforcing bar network including a beam section.

The U-shaped basket (1) shown in FIG. 1 is entirely bent in a substantially U-shape, and both ends are bent inwardly into a hook shape so that hook-shaped end portions (111) and (111) are formed. )), A predetermined number (seven in this example) of U-shaped stirrups (11) are arranged, and these are arranged substantially in parallel at predetermined intervals (substantially equal intervals (t) in this example). Each side part (112) of the character-shaped stirrup (11) is fixed by one temporary fixing streak (12) in a direction substantially orthogonal to these. The temporary fixing bar (12) functions not only as a temporary fixing function but also as an abdominal muscle. Therefore, the material is selected from this viewpoint. Further, the temporary fixing bar (12) may be used also at the bottom of the U-shaped stirrup (11) as shown by a two-dot chain line in FIG.

U-shaped basket body (1) constructed as described above
As shown in FIG. 2, a U-shaped stirrup (11) is attached to a beam form (2) provided with a lower spacer (21) group and an upper spacer (22) group in advance by using these spacers (21) ( The mold (2) is allowed to stand still on the inner bottom without touching the mold (22). At this time, an appropriate number of U-shaped baskets (1) are provided according to the length of the beam portion.

Next, a predetermined number of lower main bars (3) (3 in this example)
These are prepared and inserted in the longitudinal direction of each of the U-shaped baskets (1) arranged in a line, and each is inserted into the lower end of the U-shaped scutter wrap (11) of each U-shaped basket (1) ( Then, the lower main bars (3) are appropriately tied and fixed to the lower spacer (21) group. As a result, the U-shaped basket (1) is lifted to the height of the lower spacer (21).

Next, the upper main bar (4) is inserted into each row of the hook-shaped end portions (111) arranged on both sides of the upper surface of the U-shaped basket body (1), and they are bound and fixed. The upper stirrup (5) is bridged between the upper main bars (4) and (4) and corresponding to the position of each U-shaped stirrup (11), bound and fixed. afterwards,
A further upper main bar (4a) is inserted into each U-shaped basket (1), and the upper main bar (4a) is bound and fixed at the center of each upper stirrup (5). As described above, as shown in FIG. 2 to FIG. 4, the beam portion concrete reinforcing net (A) is assembled.
In this rebar network (A), the temporary fixing muscle (12), which is a component of each U-shaped cage (1), also functions as abdominal muscles, and is not wasted.

[0017]

According to the present invention, since the bar for temporary fixing used in the U-shaped cage also functions as abdominal muscles, unnecessary use of reinforcing bars is omitted, and the weight and weight of the U-shaped cage are reduced. Cost can be reduced. In addition, since it is pre-assembled in a cage, there is almost no difficulty in bundling work.Therefore, it is possible to easily configure a reinforcing bar network without the need for skilled workers. Is eliminated, and it is possible to form an excellent reinforcing steel network that secures strength. Since the size and weight of the U-shaped basket can be adjusted so that only one person can carry it, a large-scale device such as a crane is not required, and the assembling operation can be rapidly performed. From the above, a uniform reinforcing net can be achieved at a low cost by shortening the construction period.

[Brief description of the drawings]

FIG. 1 is a perspective view of an example of a U-shaped basket used in the present invention.

FIG. 2 is a cross-sectional configuration diagram illustrating assembling of a reinforcing bar network in a beam formwork.

FIG. 3 is a schematic side view showing an outline of an example of a beam reinforcing network assembled in a beam formwork.

FIG. 4 is a schematic perspective view showing a configuration example of a reinforcing bar network including a beam portion.

FIG. 5 is a perspective view illustrating a problem of a conventional example.

[Explanation of symbols]

 (1) U-shaped cage (2) Beam formwork (3) Lower main reinforcement (4), (4a) Upper main reinforcement (5) Upper stirrup (11) U-shaped stirrup (12) … Temporary fastening bar (111)… Hook-shaped end (112)… Side (113)… Bottom edge (A)… Reinforcing net

Claims (1)

[Claims] A predetermined number of U-shaped reinforcing bars having a main body bent substantially U-shaped and both ends bent inward to form a hook-shaped end; A U-shaped basket formed by temporarily fixing each side of each of the U-shaped reinforcing bars with at least one bar in a direction substantially orthogonal to the U-shaped reinforcing bars is arranged in a beam formwork, A lower main bar is fixed to a lower end portion of the U-shaped cage body, and then the lower main bar is fixed to a lower spacer group which is laid in a width direction at a predetermined height below the beam formwork, so that the lower main bar is framed. The above-mentioned U is installed at an appropriate height which is installed in the
The cage body is lifted, and at least two upper main bars are fixed to the hook-shaped end rows arranged on both sides of the upper surface of the U-shaped cage body, respectively, and are erected in the longitudinal direction of the frame. A method of assembling a beam-shaped concrete reinforcing network, wherein a reinforcing steel bar is bridged and attached to each U-shaped reinforcing steel bar.