JP3082147B2 - Construction method of reinforced concrete structures - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for constructing a reinforced concrete structure .

[0002]

2. Description of the Related Art As is well known, as a method of constructing a reinforced concrete building, various industrialization methods have been proposed which can save labor, reduce construction cost and shorten the construction period as compared with the conventional method. For example, a PC method or the like in which members such as columns, beams, and floors are precast in advance and assembled are widely used.

[0003]

SUMMARY OF THE INVENTION The present invention relates to a method for constructing an effective reinforced concrete structure capable of sufficiently realizing industrialization.
It is intended to provide a law .

[0004]

According to the construction method of the present invention, when constructing a reinforced concrete structure,
First, after reinforced concrete columns are formed to the height of the beam bottom, half PC beam units are erected between the upper ends of the columns, and a floor slab, which also serves as a floor form, is attached between the half PC beam units. Attach the formwork Joint portion of the pillar portion intersection of half PC beam, concrete and Da設as to form a Joint portion and the beam and the floor thereafter, before
When forming the column to the height of the beam bottom, the half PC
Angle-shaped beam receiver for supporting the end of the beam unit
Is fixed to the material and its beam receiving member,
A jig consisting of a positioning member to be
By fixing, the positioning member of the jig allows
Position the streaks and place the half PC beam unit between the columns
When installing the half PC beam unit,
It is characterized by being supported by a beam receiving member of the jig .

[0005] The construction method according to the second aspect of the present invention provides a method
Shape that matches the contour of the corner of the connection
The joint form previously formed on the half PC beam unit
It is characterized by being fixed to the side of the knit and used
is there.

[0006]

[0007]

Embodiments of the present invention will be described below. FIGS. 1 to 4 show the construction procedure of the method of the present invention. First, as shown in FIG. 1, a column 1 up to the height of the beam bottom of this floor is formed on the already constructed floor surface. . A column reinforcing bar 11 protrudes from the upper part of the column 1.

Next, as shown in FIG. 2, a half PC beam unit 2 is erected between the upper ends of the columns 1 formed above. FIG. 2 shows only the half-PC beam unit 2 in the left-right direction. However, as shown in FIG. 6, the half-PC beam unit 2 is similarly installed in a direction perpendicular to the paper surface. The half-PC beam unit 2 is made of precast concrete with the upper beam main bar 3 exposed, and concrete is further poured into the upper portion of the half-PC beam unit 2 in a later process to form the upper beam main bar 3. By embedding, a beam is finally formed.

As shown in FIG. 5, at the end of the beam unit 2, the beam lower main reinforcement 4 is bent upward and fixed to the connection portion. In order to prevent interference between the main beams 4 under the beams of the beam units 2 facing each other, they may be provided in a state shifted in the horizontal direction in advance as shown in FIG. Further, in order to prevent interference between the main beams 4 under the beams of the beam units 2 arranged in directions orthogonal to each other, they may be provided in a state where they are shifted in the height direction in advance as shown in FIG. Furthermore, the beam unit 2 in the illustrated example has haunches formed at both ends, but is not limited to this.

Subsequently, as shown in FIG. 3, a floor slab 5 is attached between the beam units 2 described above. The floor slab 5 can be made of any appropriate material as long as it can be used as a floor form for forming a floor by casting concrete on the upper part, and both ends thereof are supported by the beam unit 2. It is good to use a reinforcing rib formed on the lower surface side so that support is not necessary from the floor surface only in such a case, and in that case, it is good to arrange so that the direction of the rib is alternately changed for each span They may be arranged in the same direction. These slabs 5 are beam units 2
5 and 6 may be used.
As shown in FIG. 7, the floor slab 5 may be supported by a bracket 6 attached to the side surface of the beam unit 2. In the case where the direction of the rib is alternately changed for each span as described above, It may be provided only on one side of the beam unit 2.

Then, as shown in FIG. 6, after a formwork 10 for closing the gap between the beam units 2 is attached to the connection portion,
If concrete is simultaneously poured into the inside of the connection part, the upper part of the beam unit 2 and the upper part of the floor slab 5, the connection part, the beam and the floor are formed as shown in FIG. 4, and the frame on this floor is completed. I do.

According to the above-mentioned method, the formwork for constructing the beams and the floor can be omitted, and no support work is required at all, so that much labor saving can be achieved as compared with the conventional method. In addition, construction work and equipment work under the beam and the floor can be started immediately after the beam and the floor are erected, so that it is possible to reduce the construction cost and the construction period.

By the way, in the above-mentioned construction method, there is a concern that the position of the column reinforcing bar 11 shifts when the column 1 is formed. There is a possibility that the beam main unit 4 and the column reinforcing bar 11 interfere with each other and the beam unit 2 cannot be installed at a proper position. Therefore, when forming the column 1, it is preferable to use a jig 20 as shown in FIG.

The jig 20 includes an angled beam receiving member 2.
The jig 20 is fixed to the outer peripheral edge of the upper surface of the column 1 as shown in FIGS. 5 and 6. Then, the column rebar 11 is sandwiched between the pair of positioning members 22, 22, and the column 1 is formed as it is, whereby the displacement of the column rebar 11 can be reliably prevented. Further, by using this jig 20, the end of the beam unit 2 is supported by the beam receiving member 21. Therefore, when the beam unit 2 is directly supported on the upper surface of the column 1, there is a concern. It is possible to effectively prevent the edge of the upper surface of the pillar 1 from being damaged or missing. In addition, since the jig 20 is sufficiently anchored to the column 1 by the positioning member 22, the jig 20 itself does not fall off from the column 1. The number and positions of the positioning members 22 may be appropriately provided so that the column reinforcing bars 11 can be locked at regular positions corresponding to the positions and arrangements of the column reinforcing bars 11.

As the above-mentioned connection part formwork 10, FIG.
As shown in (1), if a shape conforming to the contour of the corner portion of the connection portion is manufactured in advance and this is fixed to the side surface of the beam unit 2 with the bolt 12 and used, As compared with the case where a mold is used, the labor for assembling and dismantling the mold can be greatly reduced. In addition, the above-mentioned connection part formwork 10
In this case, an insert metal fitting 13 for bolt fastening may be attached in advance to a predetermined position on the side surface of the beam unit 2 as shown in FIG.

[0016]

As described in detail above, according to the construction method of the present invention, after forming reinforced concrete columns up to the height of the beam bottom, a half PC beam unit is erected between the upper ends of the columns. Attach a floor slab that also serves as a floor formwork between the half PC beam units, attach a formwork to the joint, and then cast concrete to form the joint, beam and floor. As a result, the formwork is largely omitted as compared with the conventional construction method, so that it is possible to achieve a significant labor saving, a reduction in the construction cost, and a reduction in the construction period.

In particular, according to the first aspect of the present invention, the half
Angle beam for supporting the end of PC beam unit
Positioning of the column reinforcing bar fixed to the receiving member and its beam receiving member
Use a jig consisting of positioning members
When forming to the height, fix the jig to the outer periphery of the upper end of the column.
The position of the column rebar is determined by the positioning member of the jig.
It is possible to prevent the misalignment of the column reinforcing bars
The end of the half PC beam unit is attached to the beam receiving member of the jig.
The half PC beam unit by supporting
The top of the column is chipped, as in the case of
This has the effect that such a situation can be prevented. Also,
According to the second aspect of the present invention, as the formwork of the joint,
Pre-formed into a shape that matches the contour of the corner of the part
Mouth form is fixed to the side of half PC beam unit and used
Therefore, it can be said that further labor saving of formwork construction can be realized.
Has the effect.

[Brief description of the drawings]

FIG. 1 is a diagram showing a state in which a pillar is formed in the method of the present invention.

FIG. 2 is a view showing a state in which a half PC beam unit is erected in the method of the present invention.

FIG. 3 is a view showing a state in which a floor slab is attached in the method of the present invention.

FIG. 4 is a view showing a state where concrete is cast in the method of the present invention.

FIG. 5 is an enlarged elevation view of a connection portion in a state where a half PC beam unit is supported on a column upper end.

FIG. 6 is an enlarged plan view of the connection portion in a state where the half PC beam unit is supported at the column upper end.

FIG. 7 is a perspective view of a jig used in the method of the present invention.

FIG. 8 is a perspective view of a connection portion formwork used in the method of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Column 2 Half PC beam unit 3 Upper beam main reinforcement 4 Lower beam main reinforcement 5 Floor slab 10 Connection formwork 11 Column reinforcement 20 Jig 21 Beam receiving member 22 Positioning member.

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) E04B 1/16 E04C 5/18 104

Claims (2)

(57) [Claims] When constructing a reinforced concrete structure, first, reinforced concrete columns are formed up to the height of the beam bottom, and a half PC beam unit is erected between the upper ends of the columns. Attach a floor slab that doubles as a formwork for the floor and half PC
Attach a formwork to the joint at the intersection of the beams and then cast concrete to form the joint, beam and floor
And, when forming the column to a height of the beam bottom, the half P
Angle beam support for supporting the end of the C beam unit
Positioning of column reinforcement fixed to the member and its beam receiving member
The jig consisting of the positioning member for performing
By fixing the jig to the column,
When rebars are positioned and the half PC beam unit is installed between columns,
Support the end of the half PC beam unit to the beam receiving member of the jig.
A method for constructing a reinforced concrete structure, characterized by being held. 2. A mold for a connection part, wherein a corner of the connection part is formed.
The connection part formwork that is formed in advance in a shape that matches the contour
Fixed to the side of the half PC beam unit for use
The reinforced concrete structure according to claim 1,
Construction method.