JPH06136862A - Method of connecting hollow precast concrete column by centrifugal molding and wall - Google Patents

Abstract

PURPOSE:To enable execution to be simply conducted by arranging a wall reinforcement penetrated through an opening section formed in the direction of the vertical shaft of a hollow precast concrete column and placing concrete extending over the wall forms of a cast-in-place bearing wall and the hollow section of the column. CONSTITUTION:Slitty opening sections 1 corresponding to wall thickness are formed to the connecting section of a cast-in-place bearing wall in the direction of the vertical shaft of a hollow PC column A. The hollow PC column A is installed, wall reinforcements 7 are arranged to a wall section and the hollow section 6 of the PC column A so as to be penetrated through the opening sections 1, and wall forms 8 are mounted. Concrete 9 is placed extending over the wall forms 8 and the hollow section 6, thus unifying the bearing wall B and the hollow PC column A.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for joining a hollow precast concrete column (hereinafter referred to as a PC column) by centrifugal molding and a bearing wall.

[0002]

2. Description of the Related Art Conventionally, in the case of manufacturing a hollow PC column by centrifugal molding, as shown in FIG. 7, a method of previously burying a predetermined wall streak a in the body b of the hollow PC post as a bar, FIG.
As shown in FIG. 2, a method has been performed in which an insert c with an anchor is embedded in the skeleton b and then a wall reinforcing bar a made of a threaded reinforcing bar is attached to the insert c.

In the figure, d is a hollow portion of a hollow PC column, and e is a shear cotter.

[0004]

According to the above-mentioned prior art, since many rebars and inserts are attached to the PC column body, a lot of labor is required at the time of production, and many mold frames are required for molding the shear cotter. However, there is a problem in reliability regarding the integrity of the hollow PC column and the concrete of the cast-in-place bearing wall.

The present invention has been proposed in view of the above-mentioned problems of the prior art. The object of the present invention is that the construction is simple and the hollow PC column and the cast-in-place bearing wall can be integrated. The point is to provide a method for joining a hollow precast concrete column and a wall by centrifugal molding.

[0006]

In order to achieve the above object, according to the method for joining a hollow precast concrete column and a wall by centrifugal molding according to the present invention, the location of the centrifugally cast hollow precast concrete column in the longitudinal direction. A slit-shaped opening is provided in the connection part of the striking strength wall,
After arranging wall reinforcing bars that penetrate the same opening, concrete is cast across the formwork of the load-bearing wall and the hollow part of the hollow precast concrete column to construct a load-bearing wall integrated with the column. Is.

According to the second aspect of the present invention, the hollow precast concrete column is a column formed by centrifugal molding. The hollow precast concrete column includes an outer concrete column body and a hollow portion, and the column is a joint metal article embedded below the concrete column body. While connecting and arranging the main bars, arranging shear reinforcing bars in the same column main bar, and extending the column main bar from the top of the column, a rectangular slit-shaped opening at the desired position in the longitudinal direction of the column. It is provided and configured.

[0008]

According to the present invention, the wall streak (horizontal streak) is hollow P by providing the slit-shaped opening at the joint with the cast-in-place bearing wall in the longitudinal axis direction of the hollow-molded hollow PC column.
It is possible to freely arrange the reinforcement between the hollow portion of the C pillar and the load bearing wall portion at an arbitrary pitch.

In addition, since the hollow portion of the PC pillar and the bearing wall portion are connected through the opening when placing concrete after placing the reinforcing bars and formwork, the concrete extending between the pillar and the wall It becomes possible to integrate the hollow PC column with the bearing wall.

[0010]

The present invention will be described below with reference to the illustrated embodiments. A is a centrifugally molded hollow PC column, and a slit-shaped opening 1 corresponding to the wall thickness is provided in the connection portion of the cast-in-place bearing wall in the longitudinal direction of the column A, and the hollow PC column is in the opening 1. A
The shear reinforcing bar 2 built in is exposed. When the slit-shaped opening 1 is long, a concrete part 3 for connection is provided in the middle part depending on the situation.

A joint metal piece 4 is embedded in the lower part of the body of the hollow PC pillar A, and a column main bar 5 is connected to the joint metal piece 4.
A part of the shear reinforcing bar 2 arranged in the column main bar 5 is exposed in the opening 1. In the figure, 6 is a hollow portion of the hollow PC column A. The hollow PC column A has a circular cross section as shown in FIGS. 3 to 5 and a polygonal cross section as shown in FIG.

FIGS. 1 and 2 show a hollow PC column A having a circular cross section and a square cross section shown in FIGS. 3 to 5 and 6, and a bearing wall B.
After the hollow PC pillar A is installed, the wall rebar 7 is arranged in the wall portion and the hollow portion of the hollow PC pillar A so as to penetrate the opening 1 and the wall form 8 is installed. Then, concrete 9 is placed over the wall form 8 and the hollow portion 6 of the hollow PC pillar A to integrate the bearing wall B and the hollow PC pillar A.

As the slit-shaped opening 1 provided in the hollow PC column, a cross-shaped or T-shaped opening may be provided instead of the linear portion extending in the vertical direction. The width and length can be freely set as required. Moreover, this joining method is applied not only to the bearing wall but also to the nonbearing wall.

[0014]

According to the present invention, as described above, the wall reinforcement is arranged in the slit-shaped opening provided in the connection portion of the cast-in-place load-bearing wall in the longitudinal direction of the centrifugally molded hollow precast concrete column, In addition to integrating the bearing wall and the hollow PC column, there is no need for a differential line or insert for arranging the wall line, and there is no need for a shear cotter at the joint between the column part and the wall part, simplifying construction. , The construction materials are saved and the structure is reliable, and the joint between the hollow precast concrete column and the bearing wall is constructed by centrifugal molding with high reliability.

According to a second aspect of the present invention, the hollow PC column is manufactured by centrifugal molding, is composed of an outer concrete column body and a hollow portion, and the column main bar is connected to the joint metal embedded in the lower part of the body to arrange the bar. In addition, by arranging a shear reinforcing bar in the column main bar and extending the column main bar from the column top, and by providing a rectangular slit-shaped opening at a desired position in the longitudinal direction of the column, the hollow The PC pillar and the wall can be easily joined to each other, and a joint portion having both structurally high reliability can be formed.

According to the third aspect of the present invention, the joining method is applied not only to the bearing wall but also to the nonbearing wall, and the applicable range is expanded.

[Brief description of drawings]

FIG. 1 is a horizontal sectional view showing an implementation state of an embodiment of a method for joining a hollow precast concrete column and a wall by centrifugal molding according to the present invention.

FIG. 2 is a horizontal sectional view showing an implementation situation of another embodiment of the present invention.

FIG. 3 is a perspective view showing an example of a hollow precast concrete column.

FIG. 4 is a horizontal sectional view of FIG.

5 is a vertical cross-sectional view of FIG.

FIG. 6 is a horizontal sectional view showing another embodiment of the hollow precast concrete column.

FIG. 7 is a horizontal sectional view showing an example of a conventional structure.

FIG. 8 is a horizontal sectional view showing another example of the conventional structure.

[Explanation of symbols]

 A Hollow PC Column B Bearing Wall 1 Opening 2 Shear Reinforcing Bar 3 Concrete Part for Connection 4 Joining Hardware 5 Column Main Bar 6 Hollow Part 7 Wall Reinforcing Bar 8 Wall Form 9 Concrete

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Hiroshi Tsukamoto 1-8-3 Shimbashi, Minato-ku, Tokyo Inside Nippon Concrete Industry Co., Ltd.

Claims (3)

[Claims] 1. A slit-shaped opening is provided in a connecting portion of a cast-in-place bearing wall in a longitudinal direction of a centrifugally cast hollow precast concrete column, and a wall reinforcing bar penetrating the opening is reinforced. Of the hollow precast concrete columns and walls by centrifugal molding, characterized by constructing a bearing wall integrated with the pillar by placing concrete over the formwork of the bearing wall and the hollow part of the hollow precast concrete column Joining method. 2. The hollow precast concrete column is a column formed by centrifugal molding, comprising an outer concrete column body and a hollow portion, and connecting and reinforcing the column main bar to a joint metal embedded under the concrete column body. At the same time, a shear reinforcing bar is arranged on the column main bar, the column main bar is extended from the column top, and a rectangular slit-shaped opening is provided at a desired position in the longitudinal direction of the column. A method for joining a hollow precast concrete column and wall by centrifugal molding as described in the above. 3. The method for joining hollow precast concrete columns and walls by centrifugal molding according to claim 1, wherein the walls are non-bearing walls.