JPH0551921A - Assembling method for reinforcing bar for in-situ concrete pile - Google Patents

Abstract

PURPOSE:To save consumption of materials as well as assemble reinforcing bars for in-situ concrete piles simpler and quicker. CONSTITUTION:Hoops 2 are butted and welded, and the hoops 2 are supported on a temporary placer with a raising and falling support arm 31 or a support base to hold the hoops erectly. A main bar 1 is thrust through the hoops 2, the hoops on both ends are fixed to the main bar, and remaining hoops are fixed to given positions. The support arm 31 is falling down to take out a reinforcing bar cage. Since the hoops are supported on the support arm and inserted with the main bar, the assembling operation can be simplified, and since the hoops are butted and welded, the needs for excessive materials and joint allowance can be eliminated.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for assembling a reinforcing bar for a cast-in-place concrete pile or the like.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG. 5, in a method of assembling a cast-in-place concrete reinforcing rod, circular temporary frames (31) made of shaped steel or the like are installed at intervals in the longitudinal direction of the main bar, and then the temporary frame. The main bar (1) was disposed in the main bar receiving portion (32) projecting outward from the circumference of (1), and the temporary frame and the main bar were welded and fixed. Then, the reinforcing bar is bent into a circular shape, and the reinforcing bar has a diameter d of 50.
Welded hoop muscles (2) with double lap joints are sequentially passed through the main bar one by one, and the hoop muscles are set on the main bar at predetermined intervals, and the intersection of the main bar and the hoop muscle is welded and fixed in place. I was assembling the steel bars of a concrete pile.

[0003]

In the conventional method for assembling reinforcing bars for cast-in-place concrete piles, a temporary frame that is structurally unnecessary as a reinforcement material for the piles and is necessary only when assembling the reinforcing bars is provided in the reinforcing bar cage after the reinforcing bars are assembled. However, the temporary steel frame steel was buried in the finished cast-in-place concrete pile, and resources were wasted. Further, the hoop muscle is a lap joint having a joint portion of 50 times the diameter of the reinforcing bar, which is wasteful and requires extra labor and time for processing these. Furthermore, the hoop muscles were passed through the main bar one by one, and they were arranged at a predetermined interval to weld the intersection with the main bar, but this is a complicated and difficult task for even a skilled worker.
Due to the shortage of manpower these days, the development of a method for assembling reinforcing bars for cast-in-place piles with a simple and simple process has been awaited.

[0004]

[Means for Solving the Problems] In order to easily and quickly assemble the reinforcing bars of a cast-in-place pile, a predetermined number of hoop muscles are supported by a temporary hoop muscle placing device and the hoop muscles are temporarily placed, Through the hoop muscles, fix the hoop muscles that should be located at both outer ends of the main muscles to the main muscles, and move the remaining hoop muscles to the designated positions of the main muscles to fix them, and complete the temporary hoop muscle placement device. The object has been achieved by moving it so that it does not interfere with the movement of. Further, by making the end of the hoop muscle annular by butt welding, the superposition joint of the hoop muscle is stopped, the amount of rebar is reduced, and the resource is saved.

[0005]

[Function] Since a predetermined number of hoop muscles are supported by the hoop muscle temporary placement device so that the main muscles can be easily inserted, the main muscles can be easily inserted into the hoop muscles, and the hoop muscles to be located at both ends of the main muscles can be easily inserted. Since it is first fixed to the main bar, a rough shape of the rebar cage is formed. The remaining hoop muscles need only be moved along the main muscles, and the hoop muscles can be easily assembled. And since the end of the hoop bar is butt welded, the welded part has the same strength as the base metal, so a hoop bar with no weak points can be obtained, and since there is no lap joint part, saving of reinforcing bar is achieved. It

【Example】

Embodiment 1 As shown in FIG. 1, first, a hoop streak (2) is formed by bending it in a circular shape, and its end is closed by flash butt welding (2 ″). As described above, a temporary frame having undulating support arms (31) is installed at both end positions of the rebar cage, and the support arms (31) are horizontally raised and fixed,
Pass the required number of hoop muscles (2) through this support arm (31),
Keep it. Next, all the main muscles (1) are passed through the hoop muscles (2), the hoop muscles (21) at both ends are fixed to the main muscles, and the main muscles are arranged so as to be positioned at a predetermined position. As the fixing means, binding or welding can be adopted.
When passing the main muscles through the hoop muscles, the main muscles may be passed through the hoop muscles one by one and fixed in order. Alternatively, after passing all the main muscles through the hoop muscles, the hoop muscles (21) at both ends are connected to the main muscles (1).
Either way can be fixed to. When the number of main muscles is large, or when the main muscles are long, the supporting force of the hoop muscles may be increased by making the hoop muscles at both ends fixed first or by making only the hoop muscles at the ends thicker. It is desirable to make the hoop higher so that the hoop muscle is not deformed by the weight of the main muscle.
Next, the remaining hoop muscles are sequentially moved along the main muscles and fixed to the main muscles at predetermined positions. This completes the reinforced basket. Hold this completed rebar cage by hanging it with a crane,
The support arm (31) of the temporary frame is tilted from the horizontal position so that it is parallel to the pillar, and the rebar cage is taken out of the temporary storage device and transported to the site.

Embodiment 2 A temporary placement device is used which has support arms on both sides of a column and which undulates in both directions. This temporary placement device is installed at approximately the center of the rebar cage to be manufactured. Then, the support arms are raised horizontally in both directions and fixed, and the required number of hoop muscles are passed through the two support arms and temporarily placed. Next, the main muscles are passed through the hoop muscles, and the hoop muscles at both ends are supported by the supporting bases and fixed to the main muscles as in the first embodiment. The fixing means is the same as in the first embodiment,
Use bundling or welding. Pass the required number of main muscles through the hoop muscles, and fix the hoop muscles at both ends to all the main muscles by the same operation. The remaining hoop muscles are moved to predetermined positions along the main muscles and fixed to the main muscles as in the first embodiment. Finally, the supporting arm, which is held horizontally, is tilted down and the completed rebar cage is taken out.

Embodiment 3 The basic construction is the same as that of Embodiment 1, but as shown in FIG. 3, several main muscles are bundled into a bundle and passed through a hoop muscle. At this time, the support base is placed under the main bar to hold the main bar. Then, it is a method of releasing the unity and fixing it to the hoop muscle one by one. Since several main muscles are bound together, it is easy to handle and the work of passing the main muscles through the hoop muscles is efficient.

Embodiment 4 Similarly, the support arm of the temporary raising device is configured to be extendable / contractible by a hydraulic cylinder or the like, the support arm is extended in the horizontal direction at the time of assembling the rebar cage, and the support arm is contracted when the rebar cage is completely assembled. Assemble the rebar cage.

Embodiment 5 As shown in FIG. 4, a support base capable of independently holding the hoop muscles is prepared, and a required number of hoop muscles are set on this support base. As in the above-described embodiment, the main muscle is passed through this hoop muscle, then the hoop muscles at both ends are fixed to the main muscle, and the main muscle is positioned. The remaining hoop muscles are moved in the same manner as in the above-described embodiment to be arranged at predetermined positions. In this case, since there is no support arm for the temporary hoop muscle placing device, the rebar cage can be easily moved after the assembly is completed.

[Effect] Since a predetermined number of hoop muscles are supported by a temporary hoop muscle placing device or a support base so that the main muscles can be easily inserted, the main muscles can be easily inserted into the hoop muscles, and further, both ends of the main muscles can be inserted. Since the hoop muscles are fixed first to the hoop, the rough shape of the rebar cage is formed, and the rest of the hoop muscles need only be moved along the main muscles, and the hoop muscles can be easily assembled. Reinforcement assembly of cast-in-place pile is achieved at. Therefore, it is possible to deal with the situation even if not a skilled worker.

Since the end of the hoop bar is butt-welded, the welded part has the same strength as the base metal, and a hoop bar with no weak points can be obtained, and since there is no lap joint, the reinforcing bar is saved. Is achieved. Furthermore, in the reinforcement of conventional cast-in-place concrete piles, a temporary frame that is structurally unnecessary as a reinforcement material for the piles cannot be removed even after the reinforcing bars are assembled, and remains in place. The resources were wasted because they were buried in concrete piles, but such waste is eliminated because a temporary frame is not needed.

[Brief description of drawings]

FIG. 1 shows a first embodiment of the present invention.

FIG. 2 is a second embodiment of the present invention.

FIG. 3 is a third embodiment of the present invention.

FIG. 4 is a fourth embodiment of the present invention.

FIG. 5 is a diagram illustrating a conventional method for assembling a reinforcing bar cage.

FIG. 6 is a diagram illustrating a conventional method for assembling a reinforcing bar cage.

[Explanation of symbols]

 1 main muscle 2 hoop muscle 3 pillar 31 support arm 32 support base 33 support base

Claims (11)

[Claims] 1. A predetermined number of hoop muscles (2) are supported by a supporting arm (31) of a temporary hoop muscle placing device, and the hoop muscles are temporarily placed, and the main muscles (1) are passed through these hoop muscles, and both outer sides of the main muscles are passed. The hoop muscle (21) that should be located at the end is fixed to the main muscle, and the remaining hoop muscles are moved to the predetermined positions of the main muscle and fixed so that the temporary hoop muscle temporary placement device does not interfere with the movement of the completed rebar cage. A method for assembling a reinforcing bar for a cast-in-place concrete pile, which is characterized by moving it. 2. The method for assembling a reinforcing bar for cast-in-place concrete piles according to claim 1, wherein the hoop reinforcements to be located at both outer ends of the main reinforcement are fixed to all the main reinforcements and then the remaining hoop reinforcements are moved to predetermined positions of the main reinforcement. 3. The method for assembling a reinforcing bar for a cast-in-place concrete pile according to claim 1, wherein the main bars, which are bundled in groups, are inserted into the hoop. 4. The method for assembling a reinforcing bar for a cast-in-place concrete pile according to claim 1, wherein the hoop reinforcing device is provided at both ends of the reinforcing bar cage. 5. The method for assembling a reinforcing bar for a cast-in-place concrete pile according to claim 1, wherein the hoop reinforcing device is provided at the center of the reinforcing bar cage. 6. A hoop reinforcement supporting device for assembling a reinforcing bar of a cast-in-place concrete pile, which comprises a pillar (3) and a supporting arm provided on the pillar so as to be able to rise and fall. 7. A hoop reinforcement supporting device for assembling a reinforcing bar of a cast-in-place concrete pile, which comprises a pillar (3) and a support arm which is capable of expanding and contracting in the horizontal direction with respect to the pillar. 8. The hoop muscle supporting device according to claim 6, which has two supporting arms and can be undulated on both sides of the column portion. 9. The method for assembling a reinforcing bar for a cast-in-place concrete pile according to claim 1, wherein the hoop bars are welded at the ends by butt welding. 10. A predetermined number of hoop muscles are placed on a hoop muscle support base, the hoop muscles are temporarily placed to be self-supporting, the main muscles (1) are passed through these hoop muscles, and the hoop muscles (21) to be located at both outer ends of the main muscles are provided. ) Is fixed to the main reinforcement, and the remaining hoop reinforcement is moved to a predetermined position of the main reinforcement to fix the reinforcement. 11. The method for assembling a reinforcing bar for a cast-in-place concrete pile according to claim 11, wherein the main bars, which are bundled in groups, are inserted into the hoop.