JPS61146968A - Construction of reinforced concrete pillar - 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 a method for constructing columns in reinforced concrete structures.

(Prior art) and (Problem to be solved by the invention)
Prefabricated reinforced concrete frames require extremely advanced construction methods, and the weight of each member AB is generally large, requiring a large lifting machine.

In addition, as a method to reduce the weight, a member that doubles as a formwork has been developed by precasting a part of the cross section, but members that open in an open direction, such as slab plates and groove and beam members, are relatively easy to manufacture. On the other hand, it was difficult to manufacture closed-section members with a hollow center, such as pillar members.

(Means for Solving the Problems) The present invention was proposed in order to solve these problems, and includes a part of the main column reinforcement and a tie bar surrounding the main reinforcement in the frame, and A plurality of groove-shaped or L-shaped precast concrete members are formed by bending the protruding ends of the 7279 parts of the frame into hook shapes, so that the hook-shaped parts of each of the ties of adjacent members intersect. After assembling the rectangular cross-section members and inserting the main column reinforcement into the intersection of the hook-shaped portions of the stirrups, post-cast concrete is integrally poured into each of the groove-shaped or Lm precast concrete members. This relates to the method of constructing reinforced concrete columns.

(Function) In the present invention, a reinforced concrete column with a rectangular cross section is provided,
Alternatively, a groove-shaped or L-shaped precast concrete member divided into sections is manufactured in advance, and the main reinforcement of the column and a tie bar surrounding the main reinforcement of the column are built into the member, and the end of the flange part of the member 7 of the tie bar is incorporated. The protruding ends from the sections are bent into hook shapes, and a member with a rectangular cross section is assembled using the groove-shaped or L-shaped precast concrete members, and the hook parts of each of the protruding ends of the stirrups of the adjacent precast concrete members are bent. Since the main reinforcing bars of the columns are intersected and inserted through the intersection, the tie bars are restrained by the large action of the main reinforcing bars of the columns, and the reinforcing bars of the reinforced concrete columns are firmly set in the predetermined positions.

Thereafter, a reinforced concrete column is constructed by pouring post-cast concrete into the central cavity of a member having a rectangular cross section formed by each of the precast concrete members, and integrating the poured concrete with each of the precast concrete members. Ru.

(Effect of the invention) According to the present invention, the groove type or L
A column outer frame member with a rectangular cross section is assembled using precast concrete members of the mold, and using each of the precast concrete members as a formwork, post-cast concrete is poured into the internal cavity, and the cast concrete and each of the precast concrete members are combined. Since the reinforced concrete columns are integrated into one piece, construction is easy, and since each of the precast concrete members is formed into a groove shape with a divided rectangular cross section or an L-shaped cross section, it is lightweight.
Construction is simplified as large lifting equipment is not required.

Further, each of the precast concrete members has a built-in part of the column main reinforcement and a tie bar surrounding the column main reinforcement, and the protruding end portion of the member flange of the tie bar is bent into a hook shape,
When assembling the precast concrete member, the hook-shaped parts intersect and the column main reinforcement is inserted through this intersection, so the tie bars are restrained by the large action of the column main reinforcement, resulting in a multi-structured structure including the column main reinforcement and tie bars. Column reinforcing bars are firmly placed in designated positions, and structurally reliable reinforced concrete columns are constructed.

In addition, in the conventional construction method, there was a difficulty in the joint between the precast column and the shear wall, but in the present invention, the flange part of the precast concrete member is shortened by the thickness of the shear wall, and the gap between the adjacent flange parts is shortened by the thickness of the shear wall. By integrating the end of the shear wall and part of the post-cast concrete column IJ, it is possible to construct a structurally reliable joint between the shear wall and the column.

(Example) The present invention will be described below with reference to the illustrated embodiments.

The structure is a groove-shaped precast concrete member made by dividing a rectangular member with a hollow center part of a reinforced concrete column into canopies.
A part of the column main reinforcement (1) and the tie reinforcement (2) surrounding the column main reinforcement (1) are buried in advance, and a protrusion from the flange end of the member (4) in the column reinforcement (2) is provided. is bent at 90° to form a hook-shaped portion (2α).

(See Fig. 1) A diagram of a pair of groove-shaped precast concrete members (Al is assembled into a rectangular frame shape so that the hook-shaped parts (2α) of the opposing ties (2) intersect, and the same hook-shaped Part (2α
), insert the column main reinforcement (1') into the intersection of the column main reinforcement (1'
) to restrain the stirrup (2).

After that, both precast concrete members (A)
After-hit conch between CAJ! J-) (B)'z Place and post-cast concrete (a and each precast concrete member diagram above are integrated to construct a reinforced concrete column. (See Figure 2) Figure 3 shows both sides of the reinforced concrete column. In this case, each flange part of both precast concrete members (A) is shortened by the thickness of the shear wall (C), and the same shear wall (C) and post-casting are installed. This is intended to integrate with concrete CB).

FIG. 4 shows a case where shear walls (C) are attached to a reinforced concrete column in four directions, and in this case, an L-shaped precast concrete member (A') is used.

Note that the precast concrete member (A) (A'
As shown in Fig. 5, a splice sleeve (3) is attached to the column base part of the column main reinforcement (1) built in the column main reinforcement (1), and the upper and lower precast concrete members ( The column main reinforcement (1) of AJ (A') is to be joined.

In Fig. 5, (1) is the concrete member (A'
), the protruding end (D) of the column main reinforcement (1) is a beam, (E)
is a slab.

Although the present invention has been described above with reference to embodiments, the present invention is, of course, not limited to such embodiments, and can be modified in various ways without departing from the spirit of the present invention. .

[Brief explanation of drawings]

FIG. 1 is a slope view of a channel-type precast concrete member used in the method of the present invention, FIGS. 2 to 4 are cross-sectional plan views of reinforced concrete columns constructed by the method of the present invention, and FIG. It is an elevational view. Prisoner (A')...Precast concrete member, (B
)...Post-cast concrete, (1) (1')...
Column main reinforcement, (2)...Birth bar, (2α)...Hook-like part Agent Patent attorney Shige Okamoto 3 people outside the text

Claims (1)

[Claims] A plurality of groove-shaped or L-shaped precasts made by incorporating a part of the main column reinforcement and a tie bar surrounding the main bar in the frame, and bending the protruding end of the tie bar from the frame flange into a hook shape. Assemble the rectangular cross-section members using concrete members so that the hook-shaped parts of each of the stirrups of adjacent members intersect, and after inserting the column main reinforcement into the intersection of the hook-shaped parts of the stirrups, each of the above-mentioned A method for constructing a reinforced concrete column, characterized by integrally pouring post-cast concrete into a groove-shaped or L-shaped precast concrete member.