JPH07150632A - Precast concrete skeleton and construction method thereof - Google Patents

Abstract

PURPOSE:To execute tension fixing work of PC braces simple and easily to shorten a construction period in a PC skeleton and a construction method thereof. CONSTITUTION:A PC skeleton A is so constituted that a large number of PC columns 2 are erected on the concrete foundation 1 at equal intervals, girders 3 are built between the PC column 2, at the same time, that PC braces 4 are crossed diagonally. PC copper wires 6 inserted in the PC braces 4 are made to pass through the other opposite beam receiving coggings 7b from one beam receiving coggings 7a to fix, and the tension fixing is executed at lower coggings 8.

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 its construction method.

[0002]

2. Description of the Related Art Conventionally, a precast concrete frame (hereinafter referred to as a PC frame) composed of a precast concrete column (hereinafter referred to as a PC column) and a precast concrete beam (hereinafter referred to as a PC beam) installed between these PC columns. In the case of installing a precast concrete brace (hereinafter referred to as a PC brace) in a state where the PC columns are diagonally intersected with each other, the PC brace is directly installed on the PC column and the PC steel wire inserted in the PC brace is installed. Was penetrated from the PC pillar to the PC beam to fix the tension.

[0003]

As described above, the conventional P
In the C frame, the PC steel wire of the PC brace is penetrated from the PC column to the PC beam to fix the tension, which not only complicates the tension fixing work, but also lengthens the construction period. The present invention has been made in view of such a problem, and an object thereof is to shorten the construction period by simply and easily performing the tension fixing operation of the PC brace in the PC body and the construction method thereof.

[0004]

[Means for Solving the Problems] A PC skeleton for achieving the above-mentioned objects is constructed such that a large beam is erected on a beam receiving jaw of a precast concrete column erected on a foundation, and the beam receiving jaw is diagonally positioned. The precast concrete brace is installed so as to intersect with the lower jaw of the lower end of the precast concrete column in, and the precast concrete brace is prestressed. In the construction method of, the lower jaw and the beam receiving jaw are integrally projected on the lower end of the beam, and a large number of precast concrete columns are erected on the foundation, and the beam receiving jaws of these precast concrete columns are installed. A large beam is installed between them to apply prestress, and the lower jaw of the lower end of the precast concrete column at a diagonal position with the beam receiving jaw. After the precast concrete braces are crossed between them, the PC steel wires of these precast concrete braces are penetrated from one beam receiving jaw to the other beam receiving jaw to be fixed, and their tension is fixed. Is performed on the lower jaw side.

[0005]

In the PC frame, the PC brace is crimped and fixed to the PC column via the beam receiving jaw and the lower jaw,
The strength of the C structure can be increased. In addition, the construction method of the PC frame was such that the PC steel wire of the PC brace was fixed by penetrating from one beam receiving jaw to the other beam receiving jaw that opposes and fixing the tension on the lower jaw side. As a result, the work of fixing the PC brace tension 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 in detail below with reference to the drawings. FIG. 1 is a front view of a PC body according to the present invention.

The PC frame A is a PC on the foundation concrete 1.
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 crosswise manner in a diagonal direction.

One end of the PC pillar 2 is fixed by a steel rod 5 embedded in the base concrete 1, and one end of the PC pillar 2 is inserted in the PC pillar 2 by a PC steel wire 6 fixed in the base concrete 1. Prestressed. Also P
A beam receiving jaw 7 is integrally formed on the beam erection portion of the C pillar 2 and a lower jaw 8 is integrally formed on the lower end portion thereof. The girder 3 erected on the beam receiving jaw 7 is a PC steel wire 6 A floor plate 9 is erected across the girders 3 by being crimped onto the PC columns 2.

One of the PC braces 4, which are erected in a cross shape between the beam receiving jaw 7 and the lower jaw 8, has one beam receiving jaw 8.
PC brace 4a having the same length between the lower jaw 4 and
The other is the PC brace 4b which is divided into two halves.

Both end surfaces of one PC brace 4a are brought into contact with the joint surfaces of the beam receiving jaw 7 and the lower jaw 8 via joint mortar 10, and one end side of the PC steel wire 6 inserted therein is one. The beam receiving jaw 7a is penetrated by the other beam receiving jaw 7b which faces the other, and the other end side is also penetrated by the other lower jaw 8b facing from the one lower jaw 8a. The PC steel wire 6 on the beam receiving jaw 7 side is fixed, and the PC steel wire 6 on the lower jaw 8 side is tensioned and fixed by a jack.

Also, the two-divided PC brace 4b has one end surface abutted against the joint surface 11 of the beam receiving jaw 7 and the lower jaw 8 via the joint mortar 10, and the other end surface of one P
It is in contact with the joint surface 11 at the center of the C brace 4a.
Then, the PC steel wire 6 is inserted into the PC brace 4b which is divided into two by penetrating the central portion of the one PC brace 4a, and one end side thereof is changed from one beam receiving jaw 7a to the other beam receiving jaw 7b which is opposed to the other. While being penetrated, the other end side is also penetrated from one lower jaw 8a to the opposite lower jaw 8b, and similarly to the above, the PC steel wire 6 on the beam receiving jaw 7 side is fixed, and the lower jaw 8 side. The PC steel wire 6 of No. 3 is tightened and fixed by the jack.

Next, the construction method of the PC body will be described with reference to FIGS.
This will be described with reference to FIG. First, as shown in FIG. 2, the PC columns 2 having the lower jaw 7 and the beam receiving jaw 8 integrally projecting at the beam erection portion and the lower end portion are erected on the basic concrete 1 at regular intervals. The rod 5 is fixed, and the PC steel wire 6 inserted into the PC column 2 is applied with prestress.

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. Then, the PC steel wire 6 is spread over these girders 3.
, And one end of which is tightened with a jack to fix it, and a floor plate 9 is installed between these girders.

Next, as shown in FIG. 4, the PC brace 4 is installed between the beam receiving jaw 7 and the lower jaw 8 and one end of the PC steel wire 6 inserted into the PC brace 4 is connected to one beam. While penetrating from the receiving jaw 7a to the other beam receiving jaw 7b,
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 tensioned 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 tensioned with the PC steel wire 6 by the same method as described above to form one PC column. Installation between the two is completed.

In this way, each PC brace 4 is installed between the PC columns 2 via the beam receiving jaws 7 and the lower jaws 8, and P
Since the C steel wire 6 can be tensioned and fixed on the lower jaw 8 side, the work can be easily performed.

Then, each PC pillar 2 is formed by such a method.
The PC brace 4 is sequentially installed between them to construct the PC skeleton A as shown in FIG. First, after constructing the skeleton a of the first floor, the skeleton a of each floor is sequentially constructed by standing the PC pillars 2 of the upper floor on the PC pillars 2 of the lower floor in the same manner as described above. It is a thing.

[0017]

EFFECTS OF THE INVENTION A PC brace that is installed so as to intersect between a beam receiving jaw and a lower jaw at the lower end of the PC column in a diagonal position is crimped and fixed to the PC column via the beam receiving jaw and the lower jaw. Therefore, the strength of the PC body 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 on the beam erection portion are erected on the foundation, and between the beam receiving jaws of these precast concrete columns. After pre-stressing by erection a large beam, the beam receiving jaw and the lower jaw of the lower end of the precast concrete column at the diagonal position are erected by crossing the precast concrete brace, then these precast concrete brace The PC steel wire is penetrated from one beam receiving jaw to the other opposite beam receiving jaw and fixed, and the tension fixing is performed on the lower jaw side, so the tension fixing work of the PC brace is simple and easy. Therefore, the construction period of the PC body can be shortened.

[Brief description of drawings]

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

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 large beam is erected between a plurality of PC columns that are erected on the foundation concrete.

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

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

[Explanation of symbols]

 A PC frame 1 Foundation concrete 2 PC column 3 Large beam 4 PC brace 5 Steel bar 6 PC steel wire 7 Beam receiving jaw 8 Lower jaw 9 Floorboard 10 Joint mortar

Claims (2)

[Claims] 1. A precast concrete brace in which a large beam is erected on a beam receiving jaw of a precast concrete column erected on a foundation and between the beam receiving jaw and a lower jaw of a lower end of the precast concrete column in a diagonal position. A precast concrete skeleton, characterized in that the precast concrete braces are erected to intersect with each other, and prestress is applied to these precast concrete braces. 2. A plurality of precast concrete columns having a lower jaw at the lower end portion and a beam receiving jaw integrally projecting at the beam erection portion are erected on the foundation, and the beam receiving jaws of these precast concrete columns are provided. After prestressing by applying a large beam between them, the precast concrete brace is installed between the beam receiving jaw and the lower jaw of the lower end of the precast concrete column at a diagonal position, and then these precast concrete A construction method for a precast concrete skeleton characterized in that the PC steel wire of the brace is penetrated from one beam receiving jaw to the other beam receiving jaw to be fixed and the tension is fixed on the lower jaw side. .