JP2000282777A - Reinforcing bar fixing tool and reinforcing bar arranging method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a reinforcing bar fixing tool which is preferable for fixing an initial setup bar to a liner plate, saves fixing work of the initial setup bar, and positively ensures cover concrete, and to provide a reinforcing bar arranging method using the tool. SOLUTION: A reinforcing bar fixing tool 1 is produced by using a thick plate. A bolt inserting portion 3 formed at one end of the reinforcing bar fixing tool 1 and a bolt hole 11 formed in the upper surface of a liner plate 10 are superposed on each other, and they are fixed by using a bolt and a nut. Further, an initial setup bar 20 is filled into a recess formed in the other end of the reinforcing bar fixing tool 1, and they are bound, to thereby fix the initial setup bar 20 to the liner plate 10. The amount of cover concrete is adjusted by shifting the bolt in the bolt inserting portion 3.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is suitable for fixing a reinforcing bar to a liner plate in a deep foundation method, which can save labor for fixing the reinforcing bar and ensure that the distance between the liner plate and the reinforcing bar, that is, fogging. The present invention relates to a reinforcing steel fixture to be secured and a method for constructing a reinforcing steel using the same.

[0002]

2. Description of the Related Art In the deep foundation method, a hole excavated in the ground is excavated while protecting a hole wall with a circular liner plate (mountain retaining), and after excavation, a reinforcing bar is erected and concrete is poured into the hole. This is a method for producing columnar piles, that is, deep foundation piles in the ground. In the deep foundation method, a reinforcing bar is fixed to a liner plate inserted in the hole along the inner surface of the ground hole, thereby preventing the reinforcing bar from moving and deforming when casting concrete. .

Here, a conventional method for fixing a reinforcing bar to a liner plate will be described with reference to a schematic top view of FIG. 6 and a schematic vertical sectional view of FIG. First, the liner plate 10 having a size along the inner periphery of the hole is inserted into the hole 100 excavated in the ground. Next, the liner plate 10
One end of the iron wire 110 is fixed to, for example, six places at equal intervals so that the other end extends inward in the bolt hole on the upper surface of the iron wire 110. Further, a circumferential hoop bar (band steel bar) 30 is connected to all the iron wires. 110 is fixed to the other end. As a result, hoop muscles 30 ...
Are attached at regular intervals (for example, every 2 m), that is, only a part is attached instead of the total number (FIG. 6).
(A)). Next, the setup stitches 20 are attached to the attached hoop staves 30 in the vertical direction (FIG. 6B).

Next, the remaining hoops 30 are inserted into the liner plate 10 from above, and
After sequentially attaching from the bottom (FIG. 7), the hoop streaks 30
By vertically attaching the main reinforcing bars 40 to the insides of the reinforcing bars, the installation of the reinforcing bars is completed (FIG. 6C).

[0005]

However, in the above-mentioned conventional method, in order to connect the liner plate 10 and the setup line 20, a part of the hoop line 30 must be attached first. Since this attaching operation is an operation for fixing the hoop streak 30 to the iron wire 110, it takes much time compared to the operation for fixing the hoop streak 30 to the setup line 20. Further, when fixing the setup streaks 20 to the hoop streaks 30, it was necessary to visually confirm the attachment position in order to keep the setup streaks 20 vertical. Therefore, the work of laying the rebar in the liner plate 10 requires a great deal of labor.

Furthermore, since the liner plate 10 and the setup line 20 are connected by the iron wire 110, it has been difficult to keep the interval, that is, the fogging, as designed.

In view of the above circumstances, the present invention is suitable for fixing the setup streaks 20 to the liner plate 10, and saves labor for fixing the setup streaks 20 and reliably secures fogging. And a reinforcing bar construction method using the same.

[0008]

In order to solve the above problems, the invention according to claim 1 is a reinforcing bar fixing device (1) for fixing a reinforcing bar inside a liner plate for protecting a hole wall. A rigid body (for example, a thick plate 2), a bolt insertion portion (3) provided on one end side of the rigid body and covering a bolt insertion hole provided on a liner plate, and the other end side of the rigid body. Recessed part (4) for fitting reinforcing steel
And the following.

According to the first aspect of the present invention, for example, as described in the third aspect, the bolt insertion portion is provided with a bolt insertion hole (for example, a bolt) provided in the liner plate (10). After covering the hole 11), a bolt is inserted into the bolt insertion portion and the hole and fixed with a nut. Also, after a reinforcing bar (for example, a setup bar 20) is inserted into the recess, the recess and By binding the rebar,
The rebar can be fixed to the liner plate. Therefore, the labor required for fixing the reinforcing bar to the liner plate is significantly reduced as compared with the conventional example.

[0010] Further, since the reinforcing bar fixing member is formed of a rigid body, a portion connecting the reinforcing bar and the liner plate becomes strong. Therefore, for example, by using the rebar fixing tool when fixing the setup bar of the deep foundation method, it is possible to reliably secure the gap between the setup bar and the hole, that is, cover, and to reduce the setup bar compared to the conventional method. Also, the hoop can be fixed to the liner plate with sufficient strength.

Further, in the rebar fixing device according to the first aspect, as in the second aspect, the bolt insertion portion is
It may be configured to be elongated toward the other end. In this case, the amount of fogging can be easily and reliably adjusted by shifting the above-described bolt in the bolt insertion portion.

[0012]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an exploded perspective view of a rebar fixing device according to an embodiment of the present invention. FIG.
FIG. 3 is a schematic top view illustrating the structure of the reinforcing bar fixing device 1.
2, 3, and 5 show a setup bar 20 using a reinforcing bar fixture 1.
FIG. 4 is a schematic top view illustrating a method of fixing the inside of the liner plate 10. FIG. 4 is a schematic vertical sectional view of FIG.

First, the structure of the reinforcing bar fixture 1 will be described. The reinforcing bar fixture 1 is attached to one end of a steel thick plate 2 (rigid body).
A rectangular bolt insertion portion 3 is formed by punching from the upper surface to the lower surface, and a concave portion 4 for inserting a reinforcing bar is provided on the other end of the side surface of the thick plate 2.

Here, the thickness and width of the thick plate 2 are designed so that the thick plate 2 has sufficient strength to withstand the pressure applied to the thick plate 2 and to support the reinforcing bar when the concrete is poured.

Here, the length of the bolt insertion portion 3 is set to a sufficient length between the setup streaks 20 and the liner plate 10, ie, to adjust the fogging according to the operation described later. The width and depth of the recess 4 are adjusted according to the diameter of the reinforcing bar to be inserted.

Next, a method of fixing the setup streaks 20 to the liner plate 10 using the reinforcing bar fixing device 1 will be described.

First, as shown in FIG. 2, the bolt hole 3 of the liner plate 10 is overlapped with the bolt insertion portion 3 of the reinforcing bar fixing device 1, and the liner plate 10 and the reinforcing bar fixing device 1 are connected by using bolts and nuts. Fix it. Here, the reinforcing bar fixing device 1 is provided on the liner plate 10 at every 90 ° in the circumferential direction.

Next, as shown in FIG. 3 and FIG. 4, the setup streaks 20 are inserted into the recesses 4 of the respective reinforcing bar fixtures 1 and tied using a number line. In other words, four setup streaks 20 are provided in the liner plate 10 at every 90 ° in the circumferential direction in the vertical direction.

Here, since the setup streaks 20 can be positioned and temporarily fixed by being fitted into the recesses 4,
It can be easily fixed at the position as designed. Therefore, the labor required for fixing the setup streaks 20 to the liner plate 10 is significantly reduced as compared with the conventional method.

The setup line 20 and the liner plate 10
Bonding with the conventional method becomes stronger. Furthermore, the cover between the setup streaks 20 and the liner plate 10 is reliably ensured, and the amount thereof can be easily and reliably adjusted by shifting the bolts in the bolt insertion portion 3.

Next, as shown in FIG. 5, the hoop streaks 30 are attached to the inside of the setup streaks 20 by a well-known method so as to be laminated at regular intervals, and are further mounted inside the hoop streaks 30. , The main reinforcing bars 40 are attached in the vertical direction to complete the installation of the reinforcing bars.

As described above, according to this embodiment, one end of the reinforcing bar fixture 1 manufactured using the thick plate 2 is connected to the liner plate 1.
0, and the stitches 20 are fitted into the recesses 4 provided at the other end of the reinforcing bar fixing device 1 and bound.
Since the setup streaks 20 are fixed to the liner plate 10, the labor required for fixing the setup streaks 20 is significantly reduced as compared with the conventional example.

Further, since the reinforcing bar fixture 1 for fixing the hoop bars 30... And the liner plate 10 has sufficient strength and rigidity, the portion connecting the hoop bars 30. And become stronger. Therefore, it is possible to reliably secure the hoop between the hoop streaks 30 and the setup streaks 20, and to fix the hoop streaks 30 to the liner plate 10 with sufficient strength even if the setup streaks 20 are reduced by two from the conventional method. it can. Further, the amount of fogging can be easily and reliably adjusted by shifting the above-mentioned bolt in the bolt insertion portion 3.

The present invention is not limited to the present embodiment, but can be arbitrarily modified without departing from the spirit of the present invention. For example, the reinforcing bar to be fixed is not limited to the setup bar, but can be used to fix an arbitrary reinforcing bar to the liner plate. further,
The shape of the reinforcing bar fixing device 1 does not need to be plate-shaped, and may be other shapes.

[0025]

According to the first aspect of the present invention, it is possible to produce a reinforcing bar fixing tool which can significantly reduce the labor required for fixing the reinforcing bar to the liner plate as compared with the conventional example. In addition, since the reinforcing bar fixing device according to the present invention is formed of a rigid body, a portion connecting the reinforcing bar and the liner plate becomes strong. In addition, the gap between the setup streaks and the hole, that is, the cover, can be ensured, and the hoop streak can be fixed to the liner plate with sufficient strength even if the setup streaks are reduced compared to the conventional method.

According to the second aspect of the present invention, the amount of fogging can be easily and reliably adjusted by shifting the bolt in the bolt insertion portion.

According to the third aspect of the present invention, the reinforcing bar fixing device according to the first or second aspect can be easily used.

[Brief description of the drawings]

FIG. 1 is a schematic top view illustrating the structure of a reinforcing bar fixing device 1 according to an embodiment of the present invention.

FIG. 2 is a schematic top view illustrating a method for fixing the setup streaks 20 inside the liner plate 10 using the reinforcing bar fixing tool 1. FIG.

FIG. 3 is a schematic top view illustrating a method of fixing the setup streaks 20 inside the liner plate 10 using the reinforcing bar fixing tool 1.

4 is a schematic vertical sectional view of FIG. 3;

FIG. 5 is a schematic top view illustrating a method of fixing the setup streaks 20 inside the liner plate 10 using the reinforcing bar fixing device 1.

FIG. 6 is a schematic top view illustrating a conventional method of fixing a reinforcing bar to a liner plate.

FIG. 7 is a schematic vertical sectional view illustrating a conventional method for fixing a reinforcing bar to a liner plate.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Reinforcement fixture 2 Thick plate (rigid body) 3 Bolt insertion part 4 Concave part 10 Liner plate 11 Bolt hole (hole for bolt insertion) 20 Setup bar (rebar) 30 Hoop bar 40 Main bar 100 hole

Claims (3)

[Claims] 1. A reinforcing bar fixing device for fixing a reinforcing bar inside a liner plate for protecting a hole wall, comprising: a rigid body; and a bolt plug provided on one end side of the rigid body and provided on the liner plate. A bolt insertion portion covering a hole for use, and a concave portion provided on the other end side of the rigid body for inserting a reinforcing bar, The reinforcing bar fixing tool characterized by comprising: 2. The reinforcing bar fixing device according to claim 1, wherein the bolt insertion portion is elongated toward the other end. 3. A method of rebar using the reinforcing bar fixing device according to claim 1 or 2, wherein the bolt insertion portion is covered with a bolt insertion hole provided in a liner plate. After that, a bolt is inserted into the bolt insertion portion and the hole and fixed with a nut.After the reinforcing bar is inserted into the concave portion, the concave portion and the reinforcing bar are bound, so that the reinforcing bar fixing tool is attached. Fixing the rebar to the liner plate by using the method.