JPH0674608B2 - Beam-column joining method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a method for joining a reinforced concrete column and a PC beam.

(Prior Art) Conventionally, in this type of construction method, pillar concrete is placed in the pillar form up to the pillar head (below the beam), and then a PC beam is erected on the pillar head, as shown in FIG. A straight split hoop muscle (b) was arranged between the projecting end portions (a) and (a) of the adjacent column main muscles.

(Problems to be solved by the invention) In the conventional construction method, the projecting end portions of the beam main bars of the PC beams intersect at the column heads, and the column formwork is still incorporated when the PC beams are erected. A spiral hoop muscle cannot be attached to the protruding end of the columnar muscle, and as described above, the split hoop muscle must be used, and each split hoop muscle must be tied to the protruding end of the columnar muscle. However, there is a problem that it requires a lot of labor and the mounting accuracy is not good.

(Means for Solving Problems) The present invention has been proposed in order to solve such problems, in which a pillar formwork is set at a predetermined position, and concrete is cast in the pillar formwork up to the stigma. Installed, and then the protruding end of the main beam of the beam, the end of the PC beam in which the spiral hoop reinforcement in the folded state is temporarily fixed horizontally is mounted on the column head of the column formwork, and the spiral hoop reinforcement is used as the stigma. Fitting to the column bar projecting portion in the section, then release the temporary fixing of the projecting end of the beam main bar and the spiral hoop muscle, and extend the spiral hoop muscle over the entire length of the column projecting section. The present invention relates to a beam-column joining method characterized by being fixed to a projecting portion.

(Operation) In the present invention, as described above, after the column concrete is cast up to the column head in the column form set at the predetermined position,
When installing a PC beam on the same pillar head, temporarily fold the spiral hoop reinforcement in the folded state to the projecting end of the main beam of the PC beam horizontally with a tie wire, etc., and then install the PC beam on the pillar head. Fit the spiral hoop muscle to the protruding end of the column muscle from the stigma, and then release the temporary fixing of the spiral hoop muscle and the protruding portion of the beam reinforcement, While extending over the space, it is fixed to the projecting end portion of the same column reinforcement, the arrangement of the hoop reinforcement at the column-beam connection is completed, and joint concrete is placed at the connection to join the column-beam.

(Effects of the Invention) As described above, according to the present invention, the hoop reinforcement that is conventionally arranged at the column-beam protruding end in the column-beam joint space of the column head is incorporated by split hooping after the PC beam is erected. , By temporarily fixing the spiral hoop reinforcement in the folded state to the projecting end of the main beam of the PC beam, it is incorporated into the projecting end of the column at the same time as the PC beam is erected, thus significantly simplifying the construction, It improves work efficiency.

Further, by extending the spiral hoop muscle in the folded state over the entire length of the protruding end portion of the columnar bar and arranging the protruding hoop end portion, the reinforcing bar arrangement accuracy is improved.

(Examples) The present invention will be described below with reference to illustrated examples.

The column concrete (1) is placed up to the column head (under the beam) in the column form set at the specified position, and then the PC beam is erected as described later.

At this stage, the pillar formwork is still assembled.

(3A), (3B), (3C), and (3D) are PC beams, and beam main bars (4) project from the joint ends.

At the protruding end of the lower beam main bar (4) of the PC beam (3B), PC
At the time of hoisting from the yard, the spiral hoop muscles (5) that are horizontally folded are temporarily fixed by a binding wire or the like. In the figure, (6) is a line formed by binding the spiral hoop muscle (5) in a folded state.

Then, the ends of the PC beams (3A) (3C) facing each other across the column are placed on the column head (see Fig. 1), and then the PC beams (3B) (3D).
And the spiral hoop muscles (5) in the horizontally folded state temporarily fixed to the projecting ends of the beam main bars (4) of the PC beams (3B) and (3D) as shown in Fig. 2. The column bar (7) projected from the section is fitted. The PC beam end is placed on the cover portion of the column bar (7) at the outer peripheral edge of the column upper end surface so that the PC beam and the column bar do not interfere with each other. Then, the temporary fixing by the line (6) between the spiral hoop reinforcement (5) and the protruding end of the beam main reinforcement (4) of the PC beam (3B) is released, and as shown in FIG. Extend the hoop muscle (5) between the upper beam and lower beam of the beam,
The upper end and the lower end of the hoop reinforcement (5) are bound to the protrusions of the column reinforcement (7) from the stigma, respectively, and the spiral hoop reinforcement (5) is completed. , Join the columns and beams. In addition, the mold is removed from the mold after the concrete is poured and cured.

In the figure, (8) is a rib (9) protruding from the upper end of each PC beam.
It is a beam upper end streak that is inserted and arranged between.

According to the above-described embodiment, the PC beams (3A) (3B) (3
C) (3D) is installed and the spiral hoop reinforcement (5) is incorporated into the column reinforcement (7) protruding from the column head, so that the construction is significantly simplified. At this time, the spiral hoop reinforcement (5) and the PC beam (3B) are installed. ) Of the beam main bar (4) is temporarily fixed to the projecting end, and the uppermost hoop and the lowermost hoop are finally bound to the stigma projecting part of the columnar bar (7). It is possible to release the binding to the PC beam main bar in 5) and to bind the spiral hoop muscle that extends along with it to the column main bar by working from the upper part of the stigma, improving workability. Further, by extending the spiral hoop muscle (5) over the entire length of the protruding portion of the columnar muscle (7), the accuracy of the hoop interval is improved.

As described above, according to the above-mentioned embodiment, the construction efficiency and accuracy are remarkably improved.

[Brief description of drawings]

The drawings are perspective views showing the steps of an embodiment of the method of joining beam-columns according to the present invention. FIG. 1 is a step of mounting a pair of PC beams facing each other across a column, and FIG. 2 is a spiral. A perspective view showing the state before mounting the other two PC beams with the hoop muscle temporarily fixed to the stigma, Fig. 3 shows that the mounting of the PC beam on the stigma is completed and the spiral hoop muscle is extended to FIG. 4 is a perspective view showing a winding step, and FIG. 4 is a perspective view showing a state of arranging the hoop muscle with respect to the conventional columnar muscle. (1) …… Column concrete, (3A) (3B) (3C) (3D)
…… PC beam, (4) …… Main beam of PC beam, (5) …… Spiral hoop bar, (6) …… Line, (7) …… Column bar

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Takeshi Iwata 2-44 Minamiaki-cho, Chikusa-ku, Nagoya-shi, Aichi (72) Inventor Naoshi Miyazaki 1-5-36 Tamagawa Gakuen, Tokyo Machida-shi (72) Inventor Satoru Nakajima 274-1 Shimohirose, Sayama City, Saitama Prefecture

Claims (1)

[Claims] 1. A pillar formwork is set at a predetermined position, concrete is placed in the pillar formwork up to the pillar head, and then a spiral hoop reinforcement in a folded state is temporarily temporarily fixed to the projecting end of the beam main reinforcement. While mounting the end of the PC beam on the stilt of the column formwork, the spiral hoop muscle is fitted to the column reinforcement protrusion in the stilt, and then the protruding end of the beam main reinforcement and the spiral hoop muscle. The method of joining a beam and a column is characterized in that the temporary hose is released, the spiral hoop reinforcement is extended between the beam upper end reinforcement and the beam lower end reinforcement, and is fixed to the same column reinforcement projection.