JPH0579092A - Construction method of pillar RC / beam S structure - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a construction method for an SRC structure that makes it possible to shorten the construction period, omit on-site construction, and reduce support work. [Structure] The pillar form 3 is assembled by a metal foam 3a, and the assembly of the pillar form 3 and the erection of the steel frame beam 6 are performed by connecting the beam joining metal fitting 2 attached to the main bar of the pillar, the metal form 3a and the steel frame beam 6 to each other. While temporarily fixing and with temporary bolts 4 for erection, a plurality of stories are erected, and then concrete is placed on the pillar formwork 3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of constructing a column RC / beam S structure in which columns are made of reinforced concrete and beams are made of steel frame.

[0002]

2. Description of the Related Art In recent years, buildings such as office buildings often have a composite structure in which columns are steel-framed reinforced concrete structures and beams are steel frames as they become taller. In addition, in order to reduce the construction cost, it is often the case that the columns have a reinforced concrete structure and the beams have a steel frame structure.The construction method is that the construction of columns and the construction of beams are alternately repeated for each floor. Go and build all the floors of the building.

[0003]

However, in such a construction method, since the construction of the column is completed and the concrete has developed sufficient strength, the beam cannot be erected and the construction period is long. There was a problem inevitable.
In addition, if the beam is erected before the concrete of the column develops sufficient strength in order to shorten the construction period, a large amount of support work is required to support the beam, and a great deal of labor is required to assemble the support work. was there.

The present invention has been proposed in order to solve the above-mentioned conventional problems, and is a column RC which makes it possible to shorten the construction period, omit the on-site construction, and further reduce the support work.
-The purpose is to provide a construction method for a beam S structure.

[0005]

A pillar RC according to the present invention
In the construction method of the beam S structure, the concrete formwork of the column is assembled by metal foam, and the assembling of this column formwork and the erection of the steel beam are carried out by the beam joint metal and the metal attached to the main bar of the column. While temporarily fixing the form and the steel beam with temporary bolts for building, building on multiple floors is performed, and then concrete is placed on the pillar formwork.

[0006]

EXAMPLE An example of a method of constructing a column RC / beam S structure according to the present invention will be described below in order.

The main bar 1a and the hoop bar 1b of the column are assembled, and the beam joint metal 2 is attached to the beam joint (see FIG. 1). The beam joining hardware 2 is horizontally fixed to the main bar 1a by binding or a fixing nut.

Subsequently, the column form 3 is assembled into a rectangular cross section around the main bar 1a and the hoop bar 1b. The metal form 3a (steel form) is used for the pillar form 3, and the metal form 3a is integrated with each other by the temporary bolts 4 and clips 5 for erection so that they can stand vertically and horizontally. Connect (see Figure 4).

Further, an opening 7 is formed in the beam joint portion of the metal foam 3a so that an end portion of a beam 6 which will be described later can be inserted,
The brackets 2a, 2a of the beam joint metal 2 are horizontally projected from the opening 7 (see FIG. 3).

Incidentally, in order to facilitate the demolding by pulling back the metal foam 3a to the rear, a spacer 11 or the like is interposed at the connecting portion of the upper and lower metal foams 3a, 3a when assembling the column form 3. (See Figure 5).

Next, a steel frame beam 6 made of H-shaped steel or the like is bridged between the column formwork 3, 3 and the end of the steel frame beam 6 is between the brackets 2 a, 2 a of the upper and lower beam joint hardware 2 of the opening 7. insert.

Then, the upper and lower flanges 6a of the steel beam 6 and the bracket 2a of the beam joint metal 2 are integrally joined by the main bolt 4a, and the upper and lower flanges 6a of the steel frame beam 6 and the bracket 2a of the joint metal 2 are joined together. The metal foam 3 and the metal foam 3 are integrally connected by a temporary bolt 4a for erection.

The upper and lower flanges 6a, 6a at the end of the steel beam 6
In between, end plates 8 are attached to close the hole in this portion and secure the rigidity of the beam end.

Incidentally, the temporary erection bolt 4a is removed when the mold is removed from the mold, and the main bolt 4b is retightened.

In this way, the pillar main muscles 1a and the hoop muscles 1a
b, Assembling the column form 3 and the steel beam 6 for two to three layers. Further, a floor form 9 such as a deck plate is laid on the steel beams 6, 6 on each floor and is fixed to the steel beams 6 by welding or the like.

Subsequently, concrete 10 is placed in the pillar formwork 3 and on the floor formwork 9, and when the concrete 10 exhibits sufficient strength, the formwork 3 is demolded.

Thereafter, in the same manner, all the floors of the building are constructed by constructing two to three layers in the upward direction.

The floor form 9 is left as it is as a part of the floor slab, but the metal foam 3a of the column form 3 is removed and repeatedly used.

[0019]

Since the present invention is constructed as described above, it has the following effects.

Since the metal foam is used for the pillar formwork, the beam end can be directly placed on the pillar formwork. For this reason, after the pillar formwork is assembled, the subsequent work, such as erection of beams and erection of the floor formwork, can be continuously performed, and the construction period can be significantly shortened.

Further, since the metal foam is integrally fixed together with the beam-joining metal fittings and the steel beam attached to the main bars of the column by the temporary bolts for erection, it is necessary to perform the skeleton work in a cycle similar to the erection of steel framing. You can

Since the concrete of the pillar portion and the concrete of the floor portion can be separately poured, high-strength concrete can be poured only in the pillar portion, and economical construction can be achieved.

[Brief description of drawings]

FIG. 1 is a front view of a skeleton showing a construction method of a pillar RC / beam S structure.

FIG. 2 is a front view of a skeleton showing a construction method of a pillar RC / beam S structure.

FIG. 3 is a vertical cross-sectional view of a pillar / beam joint.

FIG. 4 is an enlarged vertical sectional view of a column / beam joint.

FIG. 5 is a vertical cross-sectional view of upper and lower metal foam connecting portions.

[Explanation of symbols]

1a ... Main bar, 1b ... Hoop bar, 2 ... Beam joint metal fittings, 3 ... Column formwork, 3a ... Metal foam (steel formwork), 4a ... Temporary bolts for erection, 4b ... Main bolt, 5 ... Clip, 6 ... Beam, 6a ...
Upper and lower flanges, 7 ... Openings, 8 ... End plates, 9 ...
Floor formwork, 10… Concrete, 11… Spacer.

Claims (1)

[Claims] 1. In a method of constructing a pillar RC / beam S structure in which a pillar is made of reinforced concrete and a beam is made of steel frame, a pillar formwork is assembled from metal foam, and the pillar formwork is assembled and the beam is erected. While temporarily fixing the beam-joining metal fittings attached to the main bars of the columns, the metal foam and the beams with temporary bolts for erection, a plurality of floors are erected, and then concrete is placed on the column formwork. A construction method of a pillar RC / beam S structure characterized by: