JPH06100028B2 - Prefabricated construction method of pillar reinforcement - Google Patents

Description

Description: [Industrial field of use] The present invention particularly relates to a pre-assembly method of column reinforcements in the reinforcement work of a large structure such as a nuclear power plant building.

[Conventional technology]

As shown in FIGS. 9 and 10, a screw bar reinforcement 1 is used for the large-diameter rebar of such a large-scale structure, and the bar is mechanically joined using a lock nut 2a and a coupler 2b as a joint member 2. The joint construction method is adopted. This is to rationalize the turning as an alternative to the joint construction method that takes time in other aspects such as pressure welding. The lock nut 2a and the coupler 2b are connected to the screw bar reinforcement 1 on one side of the differential and the screw bar reinforcement 1 to be connected to the other side. Set the lock nut 2a on the side in advance, move the ends of both screw bush rebars 1 against each other and straddle the coupler 2b, and lock both sides of the lock nut 2a.
Rotate 2a and tighten.

By the way, the conventional method of arranging the column reinforcing bar using the screw bar reinforcement 1 will be explained. As shown in FIG. 11, the reinforcing bar 3 which has already been arranging as protruding from the existing skeleton.
The temporary steel frame base 4 is set inside, and the column main bar 5 made of screw bar reinforcement is lifted one by one with a crane or the like and moved to a predetermined bar arrangement position.

Next, the column main reinforcement 5 and the differential reinforcement 3 are joined together with a lock nut joint using the joint member 2, and the upper end of the joined main column reinforcement 5 is the temporary steel frame for preventing horizontal collapse and maintaining the bar arrangement pitch. Temporarily fix it with the upper end of the gantry 4 and the column braces 6. In the figure, 8 indicates a scaffold.

After that, the hoop muscles 7 are wound around the pillar main muscles 5, and these are stopped by the binding wires 14 to complete the assembly of the pillar portion. On the other hand, although illustration is omitted, a vertical wall wall is arranged between the columns, and the horizontal wall bar is laid along the vertical bar wall and the main bar of the column, and fixed with a binding line to complete one step of the bar arrangement work. .

[Problems to be solved by the invention]

In such a conventional method of arranging columnar bars, the work efficiency is very poor because the columnar main bars 5 are arranged one by one. Also, since the reinforcing bars are lifted up one by one with a large crane and arranged, the operating efficiency of the crane is poor and the cost of lifting costs increases. Further, the labor load on the reinforcing bar work is large, and a shortage of skilled workers also influences, which causes a problem in securing labor, and there is also a problem in safety.

A so-called prefabricated structure in which the reinforcing bars are pre-assembled on the ground can be considered, but especially in the case of large diameter reinforcing bars, the weight of one piece is large, which makes it easier to assemble and stabilize the assembled structure when it is lifted. There is a problem, and there is a possibility that the degree of freedom for rotating or pushing / pulling the reinforcing bar at the time of joining after suspending, which is required for the lock nut joint using the screw bar reinforcing bar, may be lost.

The object of the present invention is to eliminate the inconvenience of the above-mentioned conventional example, can be easily assembled on the ground, and the assembled ones can be installed all at once in a stable state. The purpose is to provide a pre-assembly method for the pillar reinforcement that can secure the degree of accuracy.

[Means for solving problems]

In order to achieve the above-mentioned object, the present invention achieves the above-mentioned object by arranging frame plates having through holes of bar arrangement upright by a frame, and arranging the frame plates through a column main bar made of screw bar reinforcement to screw into the column main bar. Hoop muscles are wound around the column main muscles as appropriate, and a bar-shaped fixing material is attached to the hoop muscles to bind the joints. On the other hand, the column main muscles and the hoop muscles except for the four corners. The idea is to bind at an arbitrary pitch interval.

[Action]

According to the present invention, the column main bar is assembled by only inserting it into the frame plate, and the locking of both of them is performed by using the split lock nut, so that the nut can be easily and quickly mounted without rotating. Also, since the column main bar is assembled with the frame plate, it maintains a high rigidity and stable state even after lifting and construction, and since the hoop muscle and the column main bar do not bind all together, the column main bar of the It can be rotated and pushed and pulled.

〔Example〕

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

FIG. 1 is a side view showing one embodiment of the pre-assembly method for the column bars of the present invention, and in the figure, 9 shows a mount in which two H-shaped steels are arranged in parallel.

On the upper surface of the pedestal 9, an H-shaped support member 9a in which an angle member is erected and the centers are connected by long bolts is provided with a frame plate described later.
Two racks are provided with a width that allows 10 to be accommodated. Such racks 9 are arranged in parallel on the ground at an appropriate number (three in the figure), and the lower portion is fixed to the floor with bolts or the like.

In addition, the flat plate 10a is provided in the gap formed by the support member 9a of the pedestal 9.
Is set in a rectangular shape by inserting a frame frame 10 fixed with a diagonal bar 10b and temporarily fixing it with bolts, etc., but this frame frame 10 has a role as a gauge plate and a fixing plate of a column bar, Through holes 10 at the bar arrangement in advance
has formed c.

In this way, the frame plates 10 having the through holes 10c are arranged in an upright state by the gantry 9, and the column main bars 5 are laid side by side so that the frame plates 10 are sequentially penetrated through the through holes 10c.

When a predetermined number of column main bars 5 are set on the frame plate 10, a lock nut is attached to a protruding portion of the column main bar 5 penetrating from the plate 10 to prevent the frame plate 10 from being displaced from the column main bar 5 at the time of lifting. , A lock nut portion 11a as shown in FIG. 5 is divided into two, one is connected with a hinge 11b, and the other is fixed with a bolt nut 11c. As shown in FIG. 6, one end of the column main bar 5 was screwed so as to abut the frame plate 10 from the outer side.

The split lock nut 11 locks the column main bar 5 and the frame plate 10 so that the column main bar 5 and the frame plate 10 do not shift even when the column main bar 5 assembled is lifted when the column main bar 5 is mounted. It is set so that the split lock nut 11 comes to the lower side of the frame plate 10 when it is made vertical in the middle of an appropriate one (particularly, the column main bars 5 at the four corners). Then, only one of the frame plates 10 located at the end is fitted with split lock nuts 11 on both sides of all the column main bars 5, and the frame plate 10 is sandwiched between these split lock nuts 11 so as to be firmly fixed to the column main bars 5. I chose

As the next step, the hoop muscles 12 are wound around the column main bars 5 assembled by the frame plate 10 at a predetermined amount and at predetermined intervals. Then, a bar-shaped fixing material 13 such as a small-diameter reinforcing bar is attached to the side of a large number of wound hoop bars 12, each hoop bar 12 and this bar-shaped fixing material.
13 and 13 are tied together by binding wires 14.

On the other hand, the column main muscles 5 and the hoop muscles 12 are tied together with the tie lines 14 except for the column main muscles 5 located at the corners of the four corners. The column main muscles 5 and the hoop muscles 12 at the four corners are not tied at all.

With the above, the pre-assembly of the column main bars according to the present invention is completed. The sling wires 15 are attached to both sides of the column unit A thus completed.
Attach the lifting crane parent hook 16a to one side and the child hook 16b to the other side to unlock the support member 9a of the pedestal 9 and the frame plate 10 and then lift up the whole.
The frame plate 10 comes out from the gap between the support members 9a
As shown in the figure, it hangs vertically.

At this time, the shape maintenance and rigidity retention of the unit A itself are exhibited by the frame plate 10, and as described above, the split lock nuts sandwich the frame plate 10 from both sides or are on the lower surface, so that they are sufficiently locked. Reinforcing bar 5 to the plate 10
Does not fall off.

Furthermore, since the hoop muscles 12 are connected to each other by a rod-shaped fixing member 13 and one end of the hoop muscles 12 is fixed to the column main bar 5 by a binding line 14, these hoop muscles 12 are suspended when the column main bar 5 is suspended.
It does not fall off.

Then, as shown in FIG. 8, if the streak 3 is installed up to a predetermined position, the lock nut joint is performed by the joint member 2 including the lock nut 2a and the coupler 2b as described above.
At this time, the column main muscles 5 are not tied to all of the hoop muscles 12, and only the minimum necessary points are tied,
The degree of freedom such as pushing and pulling or rotation is given, and the joint with the differential bar 3 can be smoothly performed. In performing such work, the split lock nut 11 may be removed as necessary, but this can be easily and quickly performed from the standpoint of scaffolding or the like.

〔The invention's effect〕

As described above, the pre-assembly method for the column bar of the present invention is
In order to save the labor of constructing and to improve stability, when assembling the pillar unit with the screw bar reinforcement as the pillar main bar on the ground,
It can be assembled easily and accurately, and the assembled column unit maintains a stable state even when hoisting, and the flexibility of the column main bar when connecting the lock nut can be secured, thus streamlining the overall construction. Is possible.

[Brief description of drawings]

FIG. 1 is a side view showing an embodiment of the pre-assembly method for the column reinforcement of the present invention, FIG. 2 is a side view of FIG. 1, FIG. 3 is a sectional view taken along line AA of the same as above, and FIG. BB line sectional view, FIG. 5 is a perspective view of the split lock nut, FIG. 6 is a side view showing a mounting state of the split lock nut, FIG. 7 is a front view of the pillar unit according to the present invention when it is lifted, FIG. 8 is a front view of the same at the time of installation, FIG. 9 is a front view of a lock nut joint, FIG. 10 is a front view of the lock nut joint with a part thereof cut out, and FIG. 11 is a side view showing a conventional example. 1 ... Screw bar Reinforcing bar, 2 ... Joint member 2a ... Lock nut, 2b ... Coupler 3 ... Reinforcing bar, 4 ... Temporary steel frame mount 5 ... Column main bar, 6 ... Column bar receiver 7 ... Hoop Struts, 8 ... Scaffolding 9 ... Frame, 9a ... Supporting member 10 ... Frame plate, 10a ... Flat plate 10b ... Bar, 10c ... Through hole 11 ... Split lock nut, 11a ... Lock nut part 11b ...... Hinges, 11c ...... Bolts and nuts 12 ...... Hoop bars, 13 ...... Standing materials 14 ...... Bundling wire, 15 …… Sliding wire 16a …… Crane parent hook 16b …… Crane child hook A …… Pillar unit

 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-63-47469 (JP, A) JP-A-63-47471 (JP, A) Practical application JP-A-61-124279 (JP-A-63-30545) Microfilm (JP, U), which is a photograph of the details and drawings attached to the application

Claims (1)

[Claims] 1. A frame plate having through-holes with a reinforcing bar spacing is arranged upright by a gantry, and the frame plate is pierced by a column main bar made of screw bar reinforcement and locked by a split lock nut screwed to the column main bar, In addition, the hoop muscles are wound around the column main bars as appropriate, and a bar-shaped fixing material is attached to the hoop muscles to bind the joints. On the other hand, the column main muscles and the hoop muscles are bound at arbitrary pitch intervals except for the four corners The pre-assembly method of the pillar reinforcement characterized by doing.