JPS62253845A - Structure for reinforcement prefabricated construction method - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an improvement of a reinforcing bar structure used in a reinforcing bar pre-assembly method that simplifies reinforcing bar work.

[Conventional technology and its problems]

As is well known, the reinforcing bar pre-assembly method involves assembling reinforcing bars for columns, beams, etc. on the ground and prefabricating them in order to reduce the need to arrange on-site reinforcement. In the case of columns and beam members, such prefabricated structures are self-supporting reinforcing bar cages composed of main bars and hoop bars for shear reinforcement wrapped around them.
At the construction site, this prefabricated reinforced steel structure is lifted by a crane or the like and joined to the existing structure using sleeves and other joint parts.

By the way, in the structure of the conventional pre-assembled construction method, deformed reinforcing bars are used as the main reinforcements, and in order to maintain independence, the hoop reinforcements are directly fixed to the main reinforcements by bundling or welding, and in addition, plates are used auxiliary. The main reinforcements did not move at all when the structure was assembled.

Therefore, the main reinforcing bars must be joined using a cold crimping joint method (squeeze, joint method) that can be joined without moving the reinforcing bars, and a high level of erection accuracy is required.

The purpose of the present invention is to eliminate the disadvantages of the conventional example, to enable the movement of at least the main reinforcements other than the center main reinforcement without impairing the independence, and thereby to provide a reinforcing bar that enables various joint construction methods other than the cold crimp joint construction method. An object of the present invention is to provide a structure for pre-assembled construction.

[Means for solving problems]

In order to achieve the above object, the present invention arranges hoop lines around the circumference in a circular or polygonal shape. The main idea is to place a screw-frame center main bar in the center between the screw-branch reinforcing bars, connect this center main bar and other main bars with a steel plate through which these bars pass, and fix each main bar and the plate so that they can be displaced with nuts. That is.

[Effect]

According to the present invention, parts other than the central main reinforcement or including the central main reinforcement are connected to the steel plate in a displaceable state by a nut. Therefore, the nuts can be loosened on site, and the main reinforcement can be rotated and axially moved for alignment. As a result, joining methods such as threaded joints or gas pressure welding can also be used.

(Example〕 Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

Fig. 1 is a front view showing the first embodiment of the structure for the reinforcing bar pre-assembly method of the present invention, and Fig. 2 is a view taken along the line A-A of the same, in which B is the existing structure and A is this A structure newly joined to structure B is shown. Note that this example is a case of reinforcement for sexual use.

In the figure, 1 is a main reinforcing bar using threaded reinforcing bars, which is arranged in a circular or polygonal shape, and 2 is a hoop reinforcing bar for shear reinforcement that is wound around the main reinforcing bar.

In addition to this main reinforcing bar 1, a large threaded reinforcing bar with a diameter of D38 or more is arranged at the center as a central main reinforcing bar 3.

In the figure, reference numeral 4 denotes an iron plate, through which the main reinforcements 1.3 connect the main reinforcements 1 and 3, and the plate 4 and the center main reinforcement 3 are connected using lock nuts 5.
Fix it by sandwiching it from the top and bottom, or fix it by welding, etc. On the other hand, the plate 4 and the main reinforcing bars 1 are movably fixed with lock nuts 5.

Further, a hole is previously provided in the plate 4, into which a small diameter reinforcing bar 6 is inserted and fixed with a binding wire 7.

Then, the upper and lower plates 4.4 at diagonal positions like this
Between the thin reinforcing bars 6 and the hoop bars 2, a binding wire 7 is used.
It was fixed with.

Structure B, which has been assembled in advance on the ground in this way, is lifted by a crane or the like and joined to the previous structure A. At this time, the lock nut 5 is loosened and the main reinforcement 1 is rotated, or the fixed Positioning can be performed by moving main reinforcement 1 or 3 up and down.

In addition, the central main muscle 3 becomes indispensable for such adjustment in order to ensure independence.

Then, to connect the main reinforcements 1 and 3 between the structures A and B, use the screw coupler 8 and lock nut 5 as shown in the figure, and after adjusting the screw pitch on the main reinforcements 1 and 3 with these,
It may be a screw-type torque joint that introduces a predetermined torque, or
The gas pressure welding method or the conventional cold welding method may be used.

FIG. 3 is a cross-sectional plan view showing a second embodiment of the present invention. Instead of using the small-diameter reinforcing bars 6 as described above, the hoop reinforcing bars 2 are tied to diagonally arranged pairs of the main reinforcing bars 1. I fixed it with line 7. Even with this, main reinforcement 1 can move freely to some extent and there is no problem.

〔Effect of the invention〕

As mentioned above, the structure for the reinforcing bar pre-assembly method of the present invention is easy to adjust the position for joining the main reinforcements, so it is not necessary to use couplers or lock nuts to screw pitch and match even in cases other than the cold crimp joint method. Various joining methods such as threaded torque joint method and gas pressure joint method can be used, making it highly versatile.

In addition, since there is a central main reinforcement, the self-reliance is improved, and in terms of structural strength, the other main reinforcements can be relatively small in diameter, making it economical, and operations such as axis movement can be performed easily.

[Brief explanation of drawings]

Fig. 1 is a front view showing a first embodiment of a structure for reinforcing bar pre-assembled construction method of the present invention, Fig. 2 is a view taken along the line A-A of Fig. 1, and Fig. 3 shows another embodiment. FIG. 1... Main reinforcement 2... Hoop reinforcement 3... Center main reinforcement 4... Steel plate 5... Lock nut 6... Small diameter reinforcing bar 7... Binding wire 8
...Screw coupler applicant Kobe Steel, Ltd. Figure 1

Claims (3)

[Claims] (1) In order to arrange hoop reinforcements around the circumference, a screw-frame center main reinforcement is placed in the center between the screw-frame main reinforcements arranged in a circular or polygonal shape, and this center main reinforcement and other main reinforcements are connected by a steel plate that passes through them. A structure for a reinforcing bar pre-assembled construction method, characterized in that each main reinforcing bar and the plate are connected and movably fixed with a nut. (2) A structure for a reinforcing bar pre-assembled construction method according to claim 1, wherein the hoop reinforcement is fixed to a small diameter reinforcing bar passed between steel plates. (3) A structure for reinforcing bar pre-assembled construction method according to claim 1, wherein the hoop reinforcement is fixed to two diagonally opposite main reinforcements to which the hoop reinforcement is connected.