JPS6114294B2 - - 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.

The conventional method for assembling reinforcing bars for underground beams is to create a receiving frame 16 for the main reinforcement using expensive shaped steel, steel pipes, etc., arrange the main reinforcement 17 at predetermined positions in line with the frame (Fig. 9), and then attach the auxiliary reinforcement 18 to the main reinforcement. Core muscles 18' arranged in a surrounding manner
If there is, place reinforcement therein and assemble it (No. 10)
Fig. 11). When placing the upper main reinforcements and auxiliary reinforcements, a scaffold 19 is created and the long main reinforcements and auxiliary reinforcements are placed on a narrow scaffold and the work is often dangerous at high places. There is installation (Figure 11). 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, adding unnecessary cost and effort.

As a result, there is an extremely large amount of manual labor at the construction site, which slows down the progress of the work and reduces efficiency.In particular, it requires a lot of man-hours, such as building scaffolding necessary only for assembling the reinforcing bars and assembling temporary materials for attaching the reinforcing bars. The current situation is that the site environment is poor, the work is difficult, the construction period is long, and there are many drawbacks, such as high costs.

The present invention has been made in view of the above points,
This is a completely new construction method that eliminates these drawbacks and has great effects, especially when constructing reinforcing bars for underground beams with beam heights exceeding 2 meters.

The gist of this is that the rigidity of the mesh bars prepared in advance is used to assemble them on their own, so there is no need for temporary materials or scaffolding for assembling the reinforcing bars, and the assembly work is done using the mesh bars that are separated. It is only necessary to install, connect, and attach the main reinforcing bars, and the assembly is more efficient than manual assembly by manually tying each reinforcing bar one by one.As a result, the present invention has many advantages as follows. Masu.

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

2. Cage-like muscles and mesh-like 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, concrete pouring, and other 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, a plurality of auxiliary reinforcements 2 having a shape are arranged in parallel and connected by abdominal muscles 3 to form a so-called cage reinforcement 1. The contact portion between the abdominal muscles and the auxiliary muscles is connected by welding, binding, or the like. This cage reinforcement 1 is installed at a predetermined position where an underground beam will be constructed, and the lower main reinforcement 6 is placed in the cage reinforcement 1 and set. When the cage reinforcement 1 is viewed from the side, it is as shown in FIG. 3, and when the cage reinforcement 1 does not reach the length of the beam, a plurality of cage reinforcements 1 are added and arranged.

Next, as shown in FIG. 4, the mesh-like muscles 9 connected to both sides of the basket-like muscles 1 by the auxiliary muscles 7 and the abdominal muscles 8 are made to stand up on their own by utilizing their rigidity, and are connected to each other with ties 10 or the like. When the width of the underground beam of the cage reinforcement 1 is wide, as shown in Fig. 2, there is a cage reinforcement connected inside the cage reinforcement 1 by another smaller auxiliary reinforcement 4 and an abdominal reinforcement 3'. It is preferable that a core muscle 5 is provided and a mesh-like muscle 9' connected by an auxiliary muscle 7' of the core muscle and an abdominal muscle 8 are connected with a tie 10 or the like, as shown in FIG. In order to accurately maintain the mutual spacing between the raised mesh-like reinforcements 9 and 9', this can be achieved by attaching the stopper reinforcements 11 at appropriate intervals. In order to support the mesh-like muscle of the core muscle, an L-shaped muscle 5' similar to the basket-like muscle shown in FIG. 6 may be used. The kanzashi muscle 12 is passed over the uppermost abdominal muscle, and the upper main muscle 13 is placed and set as shown in FIG. In this case, if the hairpins are set before the end upper main reinforcements 13', the space between the hairpins and the hook 14 will become smaller, making it impossible to install the end upper main reinforcements 13'. It is necessary to place it in the hook in advance of the hairpins. After that, the upper main reinforcing bars in the center can be placed in sequence. However, if the hook is 90 degrees or no hook is needed, such as in the case of a beam connected to a slab, there is plenty of space, so you can set the hairpins in advance and arrange the upper main reinforcements on top of them. If there are multiple levels of upper main reinforcing bars, set them starting from the lowest level.

Next, as shown in FIG. 8, the cap ties 15 may be made of the same shape as the cage bars 1 and attached with ties 10 or the like, or they may be assembled by hand with ties 10 each.
You can also install it with etc. 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 work can be done at the designated location where the underground beams will be constructed, or it can be assembled into units at another location, lifted by a lifting machine, and transported to the designated location for assembly.

[Brief explanation of the drawing]

The figure shows an embodiment of the construction method of the present invention, and FIG. 1 is a schematic front view of a cage bar. Figure 2 is a schematic front view showing the arrangement relationship between the lower main reinforcement and the cage reinforcement. Figure 3 is a schematic side view of the divided basket muscle. FIGS. 4 and 5 are front views of mesh-like muscles attached to basket-like muscles. FIG. 6 is a schematic front view using L-shaped muscles. FIG. 7 is a schematic front view showing the arrangement relationship between the upper main muscles and the mesh-like muscles. Figure 8 is a schematic front view of Figure 7 with the cap tie attached. Figures 9, 10, and 11 are schematic front views showing the steps of the conventional reinforcing method for underground beams. 1...basketoid muscle, 5...basketoid muscle of takata muscle, 5'...
...L-shaped reinforcement, 6... Lower main reinforcement, 13, 13'...
Upper main reinforcement, 2, 4, 7, 7'...auxiliary reinforcement, 3, 3',
8, 8'...Abdominal muscle, 9,9'...Messuiform muscle, 1
1...Kanzashi muscle, 12...Kanzashi muscle, 14...
Futsuku, 15...Captain tie.

Claims (1)

[Scope of Claims] 1. A lower cage reinforcement 1 is laid on the foundation, a lower main reinforcement 6 is arranged therein, and a mesh reinforcement 9, which will be the reinforcement of the side part of the underground beam, is placed on the rise of the cage reinforcement. Using the muscles to make it independent, and taking advantage of the rigidity of the mesh-like muscle that has been made independent, pass the pincus muscle 12 through the upper restorative muscle, and then attach the upper main muscle 1 on top.
This method of assembling reinforcing bars for underground beams is characterized by assembling without using temporary materials by arranging reinforcement 3, supporting the main reinforcements with hairpin reinforcements, and installing cap ties 15 so as to cover the mesh reinforcements. 2 The lower cage reinforcement 1 is laid on the foundation, a smaller lower core reinforcement 5 is provided inside the cage reinforcement, and the lower main reinforcement 6 is arranged within it to form a mesh that serves as the reinforcement for the side part of the underground beam. The mesh-like muscle 9', which is the reinforcement for the mesh-like muscle 9 and the underground beam core muscle, is made independent by using the lower cage-like muscle and the rising muscle of the lower core muscle, and by taking advantage of the rigidity of the mesh-like muscle that has become independent. Pass the kanzashi muscle 12 through the upper abdominal muscles,
An underground beam reinforcing construction method characterized by assembling without using temporary materials by arranging upper main reinforcements 13 above, supporting the main reinforcements with hairpin reinforcements, and installing cap ties 15 so as to cover the mesh reinforcements. . 3. The method of constructing reinforcing bars for underground beams according to claim 2, wherein the lower part of the core bar is in the shape of the lower cage bar. 4. The method for assembling reinforcing bars for underground beams according to claim 2, wherein the lower part of the core bar in the lower cage bar is L-shaped.