JP2613552B2 - Precast concrete frame and its construction method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a precast concrete skeleton and a construction method thereof.

[0002]

2. Description of the Related Art Conventionally, a precast concrete frame (hereinafter referred to as a PC frame) composed of precast concrete columns (hereinafter referred to as PC columns) and a precast concrete beam (hereinafter referred to as a PC beam) installed between these PC columns. In the case where a precast concrete brace (hereinafter, referred to as a PC brace) is erected in a state of crossing diagonally between the PC columns, the PC brace is directly erected on the PC column and the PC steel wire inserted into the PC brace Was penetrated from the PC column to the PC beam, and tension was established.

[0003]

As described above, the conventional P
Since the C skeleton was tension-fixed by penetrating the PC steel wire of the PC brace from the PC column to the PC beam, there was a problem that not only the tension-fixing work became complicated but also the construction period became long. The present invention has been made in view of such a problem, and an object of the present invention is to perform a tension fixing operation of a PC brace simply and easily in a PC frame and a construction method thereof to shorten a construction period.

[0004]

In order to achieve the above object, a PC frame has a large beam erected on a beam receiving jaw of a plurality of precast concrete columns erected on a foundation, and has a diagonal position with respect to the beam receiving jaw. A precast concrete brace intersects with a lower jaw of a lower end portion of the precast concrete column in the above, and a prestress is applied to these precast concrete braces. In the construction method, a large number of precast concrete columns, which are integrally provided with a lower jaw at the lower end and a beam receiving jaw at the beam erection part, are erected on the foundation, and the beam receiving jaws of these precast concrete columns are provided. A girder is erected in between to apply prestress, and a lower jaw at the lower end of the precast concrete column at a diagonal position from the beam receiving jaw. After the precast concrete braces are crossed and installed between them, the PC steel wire of these precast concrete braces is penetrated from one beam receiving jaw to the other beam receiving jaw and fixed, and the tension is fixed. Is performed on the lower chin side.

[0005]

In the above PC frame, since the PC brace is fixed to the PC column by pressure bonding via the beam receiving jaw and the lower jaw.
The strength of the C skeleton can be increased. In the construction method of the PC frame, the PC steel wire of the PC brace penetrated from one beam receiving jaw to the opposite beam receiving jaw and was fixed, and the tension was fixed on the lower jaw side. Thereby, the work of fixing the tension of the PC brace can be performed simply and easily, and the construction period can be shortened.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a front view of a PC frame according to the present invention.

[0007] The PC frame A is composed of PC
A large number of columns 2 are erected at equal intervals, large beams 3 are erected between the PC columns 2, and PC braces 4 are erected in a diagonal direction so as to intersect.

The PC column 2 is fixed at one end with a steel rod 5 buried in the foundation concrete 1, and is inserted into the PC column 2 with a PC steel wire 6 having one end fixed in the foundation concrete 1. Prestressed. Also P
A beam receiving jaw 7 is integrally formed at the beam erection portion of the C column 2, and a lower jaw 8 is integrally protruded at the lower end thereof. The girder 3 erected on the beam receiving jaw 7 is a PC steel wire 6. And a floor plate 9 is erected between the girders 3.

One of the PC braces 4 erected in an intersecting manner between the beam receiving jaw 7 and the lower jaw 8 has one of the beam receiving jaws 8.
PC brace 4a having the same length as that between the lower jaw 4
The other is the PC brace 4b divided into two half lengths.

Both ends of one PC brace 4a are in contact with the joint surface of beam receiving jaw 7 and lower jaw 8 via joint mortar 10, and one end of PC steel wire 6 inserted therein is connected to one end. And the other end side is also penetrated from one lower jaw 8a to the opposite lower jaw 8b. The PC steel wire 6 on the side of the beam receiving jaw 7 is fixed, and the PC steel wire 6 on the lower jaw 8 is tightened and fixed by a jack.

One end of the two-piece PC brace 4b is in contact with the joint surface 11 of the beam receiving jaw 7 and the lower jaw 8 via the joint mortar 10, and the other end of the PC brace 4b is connected to one of the P-braces.
It is in contact with the joint surface 11 at the center of the C brace 4a.
Then, the PC steel wire 6 penetrates through the central portion of one PC brace 4a and is inserted into the PC brace 4b divided into two parts, and one end side of the PC brace 4a is connected to the opposite beam receiving jaw 7b from the one beam receiving jaw 7a. At the same time, the other end side is also penetrated from one lower jaw 8a to the other lower jaw 8b opposite thereto, and the PC steel wire 6 on the beam receiving jaw 7 side is fixed similarly to the above, and the lower jaw 8 side PC steel wire 6 is fixed by being tensed with a jack.

Next, the construction method of the PC frame is shown in FIGS.
This will be described with reference to FIG. First, as shown in FIG. 2, PC columns 2 in which a lower jaw 7 and a beam receiving jaw 8 are integrally protruded from a beam erection portion and a lower end portion are erected on a foundation concrete 1 at equal intervals to form a steel. Prestress is given by the PC steel wire 6 inserted in the PC column 2 while fixing with the rod 5.

Next, as shown in FIG. 3, one end is supported by the beam receiving jaw 7 of each PC column 2, and a large beam 3 is installed between each PC column 2. And the PC steel wire 6 extends over these girders 3.
And one end thereof is tightened and fixed with a jack, and a floor plate 9 is erected between these girders.

Next, as shown in FIG. 4, a PC brace 4 is erected between the beam receiving jaw 7 and the lower jaw 8, and one end of the PC steel wire 6 inserted therein is connected to one of the beams. While penetrating from the receiving jaw 7a to the other beam receiving jaw 7b and fixing it,
Similarly, the other end of the PC steel wire 6 is penetrated from one lower jaw 8a to the other lower jaw 8b, and is tightened and fixed by a jack. After the PC brace 4a is erected and fixed in one direction in this way, another PC brace 4b is erected in the other direction in an intersecting manner, and is tensioned by the PC steel wire 6 in the same manner as described above to form one PC column. Construction between the two is completed.

As described above, each PC brace 4 is installed between the PC columns 2 via the beam receiving jaw 7 and the lower jaw 8, and
The work can be easily performed because the C steel wire 6 can be tensioned and fixed on the lower jaw 8 side.

Then, each PC column 2 is formed by such a method.
The PC braces 4 are sequentially installed between them to construct the PC frame A as shown in FIG. In this method, the skeleton a of each floor is sequentially constructed by first constructing the skeleton a of the first floor, and then standing the PC pillar 2 of the upper floor on the PC column 2 of the lower floor in the same manner as described above. Things.

[0017]

According to the present invention, a PC brace erected between the beam receiving jaw and the lower jaw at the lower end of the PC column at the diagonal position is crimped to the PC column via the beam receiving jaw and the lower jaw. Therefore, the strength of the PC skeleton can be increased.

A large number of precast concrete columns having a lower jaw at the lower end and a beam receiving jaw integrally projecting from the beam erection part are erected on the foundation, and these precast concrete columns are interposed between the beam receiving jaws. A girder is erected to give a prestress, and a precast concrete brace is crossed between the beam receiving jaw and the lower jaw at the lower end of the precast concrete column at a diagonal position. The PC steel wire is penetrated from one beam receiving jaw to the other beam receiving jaw and fixed, and the tension fixing is performed on the lower jaw side, so that the tension fixing operation of the PC brace is simple and easy. Can shorten the construction period of the PC frame.

[Brief description of the drawings]

FIG. 1 is a front view of a PC frame.

FIG. 2 is a front view in which a plurality of PC columns are erected on a foundation concrete.

FIG. 3 is a front view in which a girder is erected between a plurality of PC columns erected on basic concrete.

FIG. 4 is a front view showing a state where a PC brace is erected between a plurality of PC columns erected on a foundation concrete.

FIG. 5 is a partially omitted front view of a PC frame.

[Explanation of symbols]

 A PC frame 1 Basic concrete 2 PC column 3 Large beam 4 PC brace 5 Steel rod 6 PC steel wire 7 Beam receiving jaw 8 Lower jaw 9 Floor plate 10 Joint mortar

Claims (2)

(57) [Claims] A large beam is erected on a beam receiving jaw of a plurality of precast concrete columns erected on a foundation, and a precast concrete brace is provided between the beam receiving jaw and a lower jaw at the lower end of the precast concrete column at a diagonal position. Characterized by the fact that prestresses are applied to these precast concrete braces. 2. A plurality of precast concrete columns having a lower jaw at a lower end and a beam receiving jaw integrally protruding from a beam erection part are erected on a foundation, and the beam receiving jaws of these precast concrete columns are provided. A precast concrete brace is interposed between the beam receiving jaw and the lower jaw at the lower end of the precast concrete column at a diagonal position, and a precast concrete is provided. A method of constructing a precast concrete frame, wherein a PC steel wire of a brace is penetrated from one beam receiving jaw to the other beam receiving jaw and fixed, and the tension is fixed on a lower jaw side. .