JP2917235B2 - Steel 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 method for constructing a steel-framed reinforced concrete structure.

[0002]

2. Description of the Related Art Steel-framed reinforced concrete structures carry steel columns and beams manufactured in factories to a construction site.
After building and connecting them with a crane, they are constructing scaffolds and performing rebar construction around steel frames.

[0003]

In this conventional construction method, since most of the reinforcing steel work is performed at a high place, the work efficiency is lower than in the case of a steel frame structure, the construction period is longer, and the quality is lower. Improvement is also desired from the point of securing.

The present invention was conceived in view of the above-mentioned conventional circumstances, and an object of the present invention is to limit work at a high place to a panel zone portion, thereby improving work efficiency and ensuring quality. An object of the present invention is to provide a steel frame construction method.

[0005]

SUMMARY OF THE INVENTION According to the present invention, there is provided a steel column and a steel bar surrounding a steel beam, and a column stage is provided on the steel column for each panel zone on each floor so as to be detachably mounted. The steps of installing handrails and lifting ladders on the column stage are performed on the ground, and only the installation of steel beams after the construction of the steel columns and the rebar construction of the panel zone are performed on the column stages built together with the steel columns. This solves the problems of the conventional construction method by working at a high place.

[0006]

[Operation] In the above method, since the work in the panel zone is performed at a high place, the work efficiency is remarkably improved as compared with the conventional method in which the reinforcing work on steel columns and beams is performed at a high place.

[0007] Further, since the rebar construction is performed on the ground with good feet, the quality is well controlled and the quality is easily secured.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS First, at a factory, a number of annular hoop bars 2 are inserted for each floor around a steel column 1 of required floor height made of H-section steel. After the insertion of the hoop 2 is completed, the gusset plate 3 for beam connection is docked in the panel zone of each floor (see FIG. 1).

[0009] The steel column 1 in which the hoop bars 2 have been inserted and the gusset plates 3 on each floor have been docked is carried into a construction site, and placed laterally in a terrain.

[0010] At the ground site, marking is made on the panel zone portion of the steel column 1, the determined hoop 2 a is welded, and then the length of the steel column 1 is substantially equal to the length of the steel column 1 at the four inner corners of the hoop 2, 2 a around the column. Is inserted through the same column 4.

After the hoop bars 2 and 2a of each floor are welded to the column bars 4 at regular intervals to assemble the reinforcing bars, the steel columns 1
At each of the two flange sides of each floor, the column stage receiver 5 is attached (see FIGS. 2 and 3).

When the mounting of the receivers 5 by the bolt connection is completed, the column stage 6 is mounted on each receiver 5. The column stage 6 uses a duralumin product used for construction of a steel-framed building as it is, and is detachably attached to each receiving object 5 so that it can be removed later (FIGS. 4 and 5).

Further, the column stage 6 on the same floor is
After that, a handrail 8 is attached to each column stage 6, and finally a ladder 9 for raising and lowering is attached to the upper and lower sides of the column stage 5 on one side, thereby completing the formation of the steel column 1 (see FIGS. 6 and 7). ).

In parallel with the column erection, though not shown, steel beams are also arranged on the erection site to perform rebar assembly. On this occasion,
The length of the main bar should be about 50 cm shorter than the beam length.

When the construction of the steel columns 1 and the reinforcing bars for the steel beams is completed, the steel columns 1 are first lifted by a crane, and the foundation columns or the similar steel columns 1 on the lower floor previously erected.
Build on A and join.

Next, after removing the balls of the crane using the elevating ladder 9, the worker similarly ascends to the column stage 5 using the elevating ladder 9 and removes the steel beam 10 suspended between the columns by the crane. An installation work to the steel column 1 is performed (FIG. 8)
reference).

On the column stage, installation of high tension bolts for jointing the webs on both the gusset plate and the beam side, welding of flanges, reinforcement and press-welding of beam main reinforcement, reinforcement of panel zone split hoop reinforcement, Work such as attachment of a hoop clip is performed.

[0018]

As described above, according to the present invention, since the reinforce work around the steel column and the steel beam is performed first on the ground with good feet, the quality is well controlled and the quality can be easily secured.

In addition, the reinforcement work at high places is only around the panel zone, and it is not necessary to construct a large-scale scaffold for the reinforcement work as in the past, and the reinforcement in the panel zone can be preceded by the reinforcement. In addition, work setup can be advantageously performed.

Further, the work of installing the steel beams in the panel zone and the rebar work are performed using the column stage mounted on the steel column on the ground as a scaffold, and the work is safely and efficiently performed because the elevating ladder and the handrail are already mounted. Can do well.

Since the column stage is provided with a metal fitting for each panel zone on each floor and is removably mounted, there is an advantage that the handrail and the elevating ladder can be removed together with the column stage after the construction is completed, so that the column stage can be diverted to another. .

[Brief description of the drawings]

FIG. 1 is a plan view showing the state of steel columns and hoop bars in a steel frame construction method of the present invention.

FIG. 2 is a plan view showing the arrangement of hoop reinforcements on a steel column and the mounting state of a metal fitting of a column stage.

FIG. 3 is a sectional view taken along line AA of FIG. 2;

FIG. 4 is a plan view showing a state where a column stage is attached.

FIG. 5 is a sectional view taken along line BB of FIG. 4;

FIG. 6 is a plan view showing a state where a handrail and a lifting ladder are attached.

FIG. 7 is a sectional view taken along line CC of FIG. 6;

FIG. 8 is an elevational view showing an installed state.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Steel column 2 Hoop bar 3 Gusset plate 4 Column bar 5 Column stage bracket 6 Column stage 8 Handrail 9 Lifting ladder 10 Reinforced beam

Claims (1)

(57) [Claims] 1. Reinforcing work around a steel column and a steel beam, a column stage is provided on the steel column for each panel zone of each floor, and is removably mounted. A handrail and a lifting ladder are mounted on the column stage. Process and on the ground,
A steel frame construction method in which only the installation of steel beams after the steel columns are built and the rebar work in the panel zone portion are performed at heights on the column stage built together with the steel columns.