JPS6114295B2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a completely new construction method that is particularly effective for constructing reinforcing bars for underground beams with high beam thickness.

Traditionally, especially when there is an earth retaining structure adjacent to the earth, the support bars for underground beam reinforcements are installed from the earth retaining side, or a receiving frame for the main reinforcement is made of expensive shaped steel, steel pipes, etc., and then placed at a predetermined position above the receiving frame. Currently, the upper main reinforcement and cost reinforcement are assembled on narrow scaffolding by arranging the main reinforcement and then surrounding the main reinforcement with cost reinforcement, which involves dangerous work at high places.

In addition, the scaffolding must be dismantled and removed again when concrete is poured, and the main reinforcement frame is embedded directly into the concrete, all of which add unnecessary cost and effort.

As a result, there is an extremely large amount of manual labor at the construction site, slowing down the progress of the work and reducing efficiency.In particular, scaffolding and temporary materials for attaching the reinforcing bars are required, which requires a large amount of man-hours, and the site environment is Currently, there are many drawbacks such as difficult work, long construction times, and high costs.

The present invention has been made in view of the above points,
This is a new construction method that eliminates these drawbacks and is highly effective, especially for reinforcing underground beams where the height of the beam exceeds 2m.

The gist of this is that the rigidity of the mesh-shaped bars created in advance is used to assemble the mesh bars in a self-supporting manner, and there is no need for temporary materials or scaffolding for assembling the reinforcing bars. It is only necessary to install and connect the reinforcing bars and attach the main reinforcing bars, and it is assembled with a high efficiency that is incomparable to manual assembly by manually tying each reinforcing bar one by one.As a result, the present invention has many advantages as follows. .

1 Labor force can be greatly reduced by changing the assembly from manual work to mesh-shaped and cage-shaped bars.

2. Cage-shaped muscles and mesh-shaped muscles have perfect dimensions, right angles, etc., and are rigid, so even an amateur can easily assemble them.

3. Because the mesh-shaped reinforcement has self-supporting properties, there is no need for expensive main reinforcement support frames, scaffolding, or other temporary construction materials, and construction costs can therefore be significantly reduced.

4. Reinforcement arrangement is perfect, and the assembled rebar dimensions are highly accurate, making related miscellaneous reinforcement, formwork, equipment, and concrete placement work easier and faster.

5. Since the cover can be maintained accurately and the reinforcing bars are placed in the specified positions without disturbance, it is expected that the quality and strength of the structure will improve.

6. Construction period can be drastically shortened.

7. Due to the rigidity of mesh-like bars, the number of conventional stop bars can be kept to a minimum, resulting in a significant reduction in materials and labor.

The details of this invention will be explained below based on examples.

As shown in FIG. 1, the L-shaped cage muscle 1 used in the present invention is made by welding or welding the abdominal muscles 5, 5' to the L-shaped muscle consisting of the side part 2 of the costal muscle, its lower part 3, and the lower end 4 of the other side. It is hand tied.

Next, this L-shaped cage reinforcement 1 is installed at a predetermined location where an underground beam will be constructed, as shown in FIG. 2, and the lower main reinforcement 9 is placed in the L-shaped cage reinforcement 1 and set. This L
Figure 5 shows the shape of the cage bar 1 when viewed from the side in the longitudinal direction of the underground beam. 1 L-shaped cage muscle 1
If the beam length is not reached, add multiple pieces.

When the width of the underground beam is wide, a plurality of core reinforcements 6 are arranged in parallel and a cage reinforcement 8 welded by abdominal reinforcement 7 is attached to the lower part of the L-shaped cage reinforcement 1 as shown in FIG.

As shown in FIG. 3, the abdominal muscles 11 are attached to the core muscles 10,
As shown in FIG. 4, the abdominal muscles 15 are welded to the costal muscles 14 to form mesh-like structures 12 and 16 that are self-supporting by utilizing their rigidity. 16 is attached to the cage-shaped reinforcement 8 with mesh-shaped reinforcements 12, respectively, with ties 13. To support the mesh-like muscle of the takata muscle, an L-shaped muscle similar to the cage-like muscle may be used.

In order to accurately maintain the spacing between the mesh bars 12, 16 and the side portion 2 of the L-shaped cage bar 1, it is achieved by attaching the stop bars 19 at appropriate intervals as shown in FIG. When a core muscle is not required, a mesh-like muscle 16 can be attached to the lower end of the L-shaped cage muscle.

Next, as shown in FIG. 7, the upper main reinforcement 21 is placed and set. In this case, Kanzaki muscle 20
If set before the end upper main reinforcement 21', the space between the hairpins 20 and the hook 22 will become smaller, making it impossible to install the end upper main reinforcement 21'. It is necessary to place it in the hook 22 prior to the installation.

After that, the upper main reinforcing bars 21 in the central part may be sequentially arranged. However, if the hook is 90 degrees or no hook is needed, as in the case of a beam connected to a slab, there is sufficient space, so it is sufficient to set the hairpins in advance and arrange the upper main reinforcements 21 on top of them. If the upper main reinforcing bars have multiple levels, set them starting from the lowest level.

Next, as shown in FIG. 8, the cap tie 25 uses a mesh-shaped muscle welded to the abdominal muscle 24.
Alternatively, each cap tie may be connected and attached using a bundle 26 or the like by hand assembly. In this way, the assembly of reinforcing bars for high underground beams exceeding 2 meters in width can be greatly streamlined, and the various effects mentioned above can be obtained.

The above actions may be performed at the location where the underground beam is constructed, or it may be assembled into a unit at another location, lifted up by a lifting machine, etc., and transported to the designated location.

[Brief explanation of the drawing]

The drawings show an example of the construction method of the present invention.
Figures 4 to 4 show the reinforcing bar assembly procedure. Figure 5 is a side view of the bottom L-shaped cage muscle, Figure 6 is a front view of the bottom L-shaped cage muscle attached to the mesh muscle, Figure 7 is a diagram of the relationship between the upper ribs and the upper main reinforcement.
Figure 8 is a diagram showing the relationship with the cap tie installed. 1...L-shaped cage muscle, 5, 5', 11, 15,
24...abdominal muscle, 8...basketoid muscle of takata muscle, 9...lower main muscle, 12...mesh-form muscle of takata muscle, 16...
... mesh-like muscle on the side of the costal muscle, 21, 21'... upper main muscle, 25... cage-like muscle of the cap tie.

Claims (1)

[Claims] 1. An L-shaped cage reinforcement 1 that integrates one side and a lower part of the auxiliary reinforcement is laid on the base, and the lower main reinforcement 9 is arranged in the lower part, and the other side of the underground beam is laid. The mesh-form muscle 16, which is the main part of the body, is made independent by using the shorter rising muscle of the L-shaped basket-like muscle, and the stiffness of the mesh-form muscle that has been made free-standing is utilized to pass the kanzashi muscle 20 through the upper abdominal muscle, and the upper main muscle is placed above it. This method of assembling reinforcing bars for underground beams is characterized by assembling without using temporary materials by arranging reinforcements 21, supporting the main reinforcements with pintail reinforcements, and installing cap ties 25 so as to cover the mesh reinforcements. 2 An L-shaped cage reinforcement 1 that integrates one side and a lower part of the auxiliary reinforcement is laid on the base, an even smaller lower core reinforcement 8 is provided inside the lower part of the L-shaped cage reinforcement, and a lower main reinforcement 9 is installed inside it. The mesh-shaped reinforcement 16 which becomes the opposite side of the underground beam, the mesh-shaped reinforcement 12 which becomes the reinforcement of the underground beam core reinforcement, the shorter one of the L-shaped cage reinforcement and the rising reinforcement of the lower core reinforcement. By utilizing the rigidity of the mesh-formed muscle, which has been made independent, the upper abdominal muscles are
This underground beam is characterized in that it can be assembled without using temporary materials by passing through 0, placing upper main reinforcements 21 on top, supporting the main reinforcements with hairpin reinforcements, and installing cap ties 25 so as to cover the mesh reinforcements. Reinforced construction method. 3. The reinforcing reinforcement construction method for an underground beam according to claim 2, wherein the lower core reinforcement is a cage reinforcement (shaped) in the lower part of the L-shaped cage reinforcement. 4. The reinforcing reinforcement construction method for an underground beam according to claim 2, wherein the lower core reinforcement is L-shaped in the lower part of the L-shaped cage reinforcement.