JPH0519384Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] The present invention relates to reinforcing bars placed in the ground when constructing slope protection structures, and in particular relates to prefabricated reinforcing bar assemblies. .

[Conventional technology]

Conventionally, slope protection structures have been developed that are constructed by constructing formwork in a lattice pattern extending horizontally and vertically on the ground, placing reinforcing bars within the formwork, and pouring concrete into the formwork. ing. In recent years, such slope protection structures have begun to be constructed which have particularly strong structures with a large amount of reinforcing steel.

[Problems that ideas should solve]

In construction work involving a large amount of reinforcing bars, it is extremely difficult to arrange the reinforcing bars accurately as designed on uneven slopes.

In addition, there has been a serious shortage of construction workers in recent years, and there has been a particular shortage of reinforcing bar workers.From this point of view, there is a need to save as much labor as possible in on-site work.

For this reason, some attempts have been made to prefabricate reinforcing bar assemblies as shown in FIG. 7 in advance at a factory and place these on-site to facilitate and accurately carry out the reinforcing work.

In the figure, such a reinforcing bar assembly 1 includes at least two upper end reinforcements 2 and at least two lower end reinforcements 3.
A set of main reinforcing bars 2 is constituted by this, and the main reinforcing bars constituting the upper end reinforcing bars 2 and the lower end reinforcing bars 4 are arranged parallel to each other at appropriate intervals. Here, the upper end reinforcement 3 is placed on the top side of the formwork, and the lower end reinforcement 4 is placed on the ground side of the formwork. They are tied together in a cross shape. In this state, each main reinforcement is held at a desired position, and a rectangular ring-shaped hoop reinforcement 5 is placed around the outer circumference of the main reinforcement and welded to the main reinforcement, and the main reinforcements are fixed together by welding or the like. , is constructed as a reinforcing bar assembly 1 by integrating the whole.

The reinforcing bar assembly 1 as described above is delivered to the site, placed at the vertical and horizontal intersections of the slope protection structure, and fixed to anchors driven into the ground, etc., and the reinforcing bars are positioned in the vertical and horizontal directions. be exposed.

Next, other reinforcing bars (not shown) are connected between the ends of the main bars of the reinforcing bar assembly, which are spaced apart from each other as appropriate, to extend the reinforcing bar assembly. Next, the hoop reinforcements 5 placed on the reinforcing bar assembly 1 are moved and arranged at appropriate intervals in the longitudinal direction of the extended main reinforcement, and the hoop reinforcements 5
A slope protection structure is constructed by fixing the main reinforcements of the main reinforcements and the extension parts to each other with binding wires, surrounding these main reinforcements with formwork, and pouring concrete.

By the way, the hoop reinforcement 5 fixed to the outer periphery of the main reinforcement of the reinforcing bar assembly 1 serves to prevent the reinforcing bar assembly 1 from being destroyed when shearing force is applied to the reinforcing bar assembly 1. be. This hoop muscle 5
is formed by bending reinforcing bars at the four corners to form a rectangular ring shape, abutting the ends of the reinforcing bars, and welding the abutted portions 5a (see FIG. 7). Also, prepare longer reinforcing bars,
The two ends were placed one on top of the other without butting each other, so that when concrete was poured later, they would be fixed by this concrete (not shown).

However, when using the hoop reinforcement 5 having the above configuration, when a large shearing force is applied to the reinforcement assembly 1,
Stress acts on the welded portion 5a of the hoop reinforcement 5 and the overlapped portion of the reinforcing bars, causing these portions to break, resulting in the problem that the reinforcing bar assembly 1 does not have sufficient durability.

The present invention was devised in view of the above-mentioned problems, and provides a highly durable reinforcing bar assembly that will not easily break when a large shearing force is applied to the reinforcing bar assembly. The purpose is to

[Means to solve the problem]

The above problem can be solved by at least two problems in the present invention.
The main reinforcements constituting the upper end reinforcement consisting of the main reinforcement and the lower end reinforcement consisting of at least two main reinforcements are arranged parallel to each other at appropriate intervals to form a set of main reinforcement assemblies, and these two sets of main reinforcement Reinforcing bars for slope structures are made by intersecting each other and fixing them in a cross shape, and extendable and contractible hoop reinforcements are formed in a spiral shape so as to surround the outer periphery of each of the main reinforcement assemblies extending in all directions. This is achieved by an assembly.

[Effect]

The main reinforcement assembly of the present invention is pre-assembled in a cross shape, so it can be delivered to the site as it is, and
It can be placed at the longitudinal and lateral intersections of the slope structure, thereby determining the longitudinal and lateral positioning of the reinforcing bars. In addition, by placing and fixing an extension main bar between the ends of the main bars of each reinforcing bar assembly, and extending the spiral hoop bar placed around this main bar, this hoop bar becomes an extended main bar. It will surround the surrounding area. Therefore, when a strong shearing force is applied to the reinforcing bar assembly, the continuous and integrally formed hoop reinforcement effectively absorbs such external force and prevents the reinforcing bar assembly from being destroyed. do.

〔Example〕

Hereinafter, preferred embodiments of the reinforcing bar assembly according to the present invention will be described in detail with reference to the drawings.

Figures 1 and 2 show a reinforcing bar assembly 11 according to the present invention.
FIG.

In the figure, the reinforcing bar assembly 11 is composed of two sets of main reinforcing bar assemblies 1.
2, 12. In this embodiment, the main reinforcement assembly 12 is a combination of two upper end reinforcements 13, 13 and two lower end reinforcements 14, 14, and these main reinforcements are arranged in parallel with each other at appropriate intervals. Two sets of main reinforcement assemblies 12 are crossed with each other and assembled in a cross shape.

Furthermore, the main reinforcement 1 near the intersection of the main reinforcement assembly 12
3 and 14, one end 15a of the hoop muscle 15 is fixed by means such as welding (see FIGS. 1 and 3).
(see figure).

Here, the hoop reinforcement 15 used in the reinforcing bar assembly 11 of the present invention is constructed as shown in FIG. 4. In the figure, the hoop reinforcement 15 is made of a single linear member made of a highly rigid metal material such as reinforcing steel. In this embodiment, this linear member is formed in a continuous spiral shape to form a rectangular shape, and is formed to be expandable and contractible in the left and right directions in the figure. Therefore, unlike conventional hoop reinforcements, it does not have structurally weak parts such as welded joints, so even if a shearing force is applied to the hoop reinforcements 15, the stress concentration will easily reduce the stress. It is designed so that it will not be broken. When the reinforcing bar assembly 11 is delivered to the site, these hoop bars are placed near the intersection of the main bar assembly 12' extending toward the left in FIG. It is wound in a contracted state with one end fixed to the main reinforcement, and after the reinforcing bar assembly 11 is delivered to the site and the main reinforcement is extended as described later,
As shown around the main reinforcement assembly 12 extending toward the lower right in FIG. 1, the main reinforcement can be extended in the longitudinal direction.

The reinforcing bar assembly 11 according to the present invention is constructed as described above, and when using it on site, the reinforcing bar assembly 11 is placed on the slope of a suitable number of rocks, and the fourth
As shown in the figure, each adjacent reinforcing bar assembly 11
These reinforcing bar assemblies 11 are aligned so that the extension lines of each main reinforcing bar coincide with each other. This completes the vertical and horizontal alignment of the reinforcing bars.

Next, the main reinforcing bars 19 for extension are arranged between the main bars of the reinforcing bar assemblies 11, 11 so that their ends overlap, thereby connecting the reinforcing bar assemblies 11, 11. At this time, depending on the need for strength, etc., the upper end reinforcement 13
The reinforcing main reinforcement 20 may be arranged and fixed between the lower end reinforcement 14 and the lower end reinforcement 14 (see FIGS. 3 and 5).

Next, a hoop muscle 1 is placed around each main reinforcement assembly 12.
5 is extended so that the hoop muscle surrounds the main extension muscle 19. At this time, the main reinforcement assembly 12 and the extension main reinforcement 19 may be fixed at predetermined intervals using binding wires or the like (not shown).
As described above, the hoop reinforcement 15 used in the reinforcing bar assembly 11 of the present invention is constructed by forming a single linear member into a spiral shape. It is easier to construct and has higher strength. In this way, the work of arranging reinforcing bars on the ground in a grid is completed using the reinforcing bar assembly 11 and the main reinforcing bars 19. The reinforcing bar assembly 11 and the main reinforcement 19 are surrounded from left and right by weir plates 21 to form a formwork. As the weir plates 21, in addition to plywood weir plates, crimp metal, expanded metal, metal lath, etc. are preferably used. It will be done. Finally, the slope protection structure is constructed by pouring concrete 12 into this formwork.

Note that the hoop reinforcement used in the reinforcing bar assembly according to the present invention is not limited to the shape shown in the drawings; for example, it may be formed in a continuous spiral shape using linear members, or it may be freely expandable or contractible using linear members. Of course, it is not necessary to have the shape described in the embodiment as long as it is integrally constructed and surrounds the main reinforcement.

[Effect of idea]

As described above, the reinforcing bar assembly according to the present invention is constructed by intersecting and integrating the main reinforcing bar assemblies, so this reinforcing bar assembly is transported to the site and placed on the ground. By simply determining the height, width, etc. where reinforcing bars should be placed, the labor-intensive and difficult work of reinforcing on slopes can be done with limited manpower.
It can be done in a short time.

Furthermore, in the reinforcing bar assembly according to the present invention, since the outer periphery of each main reinforcing bar assembly is surrounded by a single hoop bar formed in a spiral shape, a strong shearing force is applied to the reinforcing bar assembly. When an external force is applied, the hoop muscle does not easily break because it is made of a single linear member that continues in a spiral shape.
Therefore, it is possible to provide an excellent slope structure with a strong structure that is not easily destroyed by such external forces.

[Brief explanation of the drawing]

Fig. 1 is a schematic perspective view showing a reinforcing bar assembly formed by integrating two sets of main bar frames, Fig. 2 is a plan view of the reinforcing bar assembly according to the present invention, and Fig. 3 is the same as Fig. 2. FIG. 4 is a perspective view showing the hoop reinforcement, FIG. 5 is a plan view showing the main reinforcement placed between two adjacent reinforcing bar assemblies, and FIG. FIG. 2 is a perspective view of a slope structure constructed using the reinforcing bar assembly according to FIG. FIG. 7 is a perspective view showing a conventional reinforcing bar assembly. 10...Reinforcement bar assembly, 12...Main bar assembly, 13...
...upper end muscle, 14...lower end muscle, 15...hoop muscle,
19...Main reinforcement for extension, 20...Main reinforcement for reinforcement,
21...Weir board, 22...Poured concrete.

Claims (1)

[Scope of utility model registration request] The main reinforcements constituting the upper end reinforcement consisting of at least two main reinforcements and the lower end reinforcement consisting of at least two main reinforcements are arranged in parallel at appropriate intervals to form one main reinforcement assembly, and these two sets of main reinforcement The assemblies are fixed in a cross shape by intersecting each other, and a single hoop muscle formed in a spiral shape surrounds the outer periphery of each of the main reinforcement assemblies extending in all directions, and is extendable and retractable. Rebar assembly for slope protection structure.