JPH0518114A - Prefabricated reinforcing bar construction method for steel framed reinforced concrete structure building - Google Patents

Abstract

PURPOSE:To reduce the number of joint positions of a beam main reinforcement, improve construction efficiency, and dispense with a wide stockyard. CONSTITUTION:Beam main reinforcements 3 are arranged in the protruded state by the length of about 1/2 of a span from the sides of pillar steels 1. After the pillar steels 1 are erected, beam steels are hoisted and suspended between pillar steels, and end sections of the beam main reinforcements 3 butted to each other are connected between the pillar steels 1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pre-assembled rebar construction method used for constructing a building having a steel-framed reinforced concrete structure (hereinafter referred to as "SRC structure").

[0002]

2. Description of the Related Art Conventionally, as a pre-assembled reinforcing bar construction method used for constructing an SRC structure building, a beam main bar is pre-assembled with a beam main bar,
When constructing a pillar steel frame, suspend a beam steel frame with a beam main bar previously assembled between the column steel frames, connect both ends of the beam steel frame to the column steel frame, and connect both ends of the beam main bar to the steel bars on the column steel frame side with a sleeve etc. Is being done.

[0003]

According to the conventional example, since the number of joints of the beam main bars is increased, the work of joining the reinforcing bars is increased, and the construction of the building requires labor and time. In addition, the beam steel frame with the beam main bar pre-assembled requires a large stockyard because the beam steel frames cannot be stacked as they are in the stockyard.

An object of the present invention is to reduce the number of joints of the main beam bars to improve the efficiency of construction. Another object of the present invention is to eliminate the need for a large stockyard as compared with the prior art.

[0005]

In the pre-assembled reinforcing bar construction method of the present invention, the beam main bar is preliminarily set to approximately 1 / span of the span from the side of the column steel frame.
After reinforcing the pillar steel frame in a state of protruding to the length of 2, and after constructing the pillar steel frame, suspend the beam steel frame between the pillar steel frames,
It is installed between pillar steel frames, and connects the above-mentioned beam main bar end portions which are mutually opposed between the pillar steel frames.

[0006]

[Operation] At the site, the main reinforcement of the beam between the steel columns is only connected to the middle part of the beam.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below together with a building construction method. First, as shown in FIG. 1, pillar steel frames 1, ... Having a plurality of floors (three floors in the example shown in the figure) are built at predetermined intervals. Before building, the beam joint bracket 2a is joined to each pillar steel frame 1 at a position where the beam steel frame 2 is attached, and the beam main bars 3 are attached along the beam joint bracket.
Are laid out, and the column main bars 4, 4a are also laid out. In this case, it is preferable to first assemble the column stirrups 4a. 1 and 2, a part of the stirrup of the pillar and the stirrup of the beam is omitted. The beam main bars 3 are preassembled into the L-shaped pillar steel frames 1 located at both ends in FIG. 1 and the linear pillars in the middle pillar steel frames 1, respectively. The length of the main beam 3 of the beam protruding from the pillar steel frame 1 is set to be approximately half the length (span) of the beam. And set them to face each other.

Next, the beam joining brackets 2a of the respective layers,
The beam steel frame 1 is sequentially hung between the 2a by a crane, and each bracket and both ends of the beam steel frame are temporarily fixed using bolts and bolt holes, and knock pins are inserted and fixed for bolt holes at necessary places ( 4 sections in Figure 1).

After that, the columns and beams of only the bottom layer of the building shown in FIG. 1 are fully tightened using the scaffold 6 (3 construction sections). Then, after connecting the ends of the beam main bars 3 and 3 facing each other and arranging the stirrup 3a and finishing the beam barring (2 works section), the pillar and beam formwork is assembled, and the slab bar 5 is arranged (1 construction section), and then concrete of columns / beams and slabs is placed, and as shown in FIG. 2, columns 7, beams 8 and slabs 9 are placed.
Is completed, and the construction of only the bottom layer (one layer) is completed.

After that, two layers of final fastening are carried out and construction is carried out according to the above-mentioned steps, and the existing layers are sequentially used to perform the final fastening of the immediately upper layer. To place.

When a building is large in scale, in order to enable efficient work by a small number of workers, for example, as shown in FIG. It may be divided into a construction section for construction, a construction section for formwork, and a construction section for slab reinforcement.

The beam joining bracket 2a is not essential to the present invention.

[0013]

According to the present invention, since the number of joints of the main beam of the beam can be reduced, it is possible to reduce the time and effort required for joining the main beam of the beam, and to improve the efficiency of construction. Since the beam steel is not assembled with the beam main bar first, it does not require a large stockyard as compared with the conventional one because the beam steel can be stacked.

[Brief description of drawings]

FIG. 1 is a front view showing a state in which a beam steel frame is erected on a column steel frame in which beam main bars are assembled in advance except for a part thereof.

FIG. 2 is a front view showing a state in which construction has been completed for the first floor portion except a part.

FIG. 3 is a partial enlarged plan view showing a state in which a beam steel frame is installed on a column steel frame.

[Explanation of symbols]

 1 Column steel frame 2 Beam steel frame 3 Beam main bar 4 Column main bar

Claims (1)

Claims: 1. The main reinforcement of the beam is arranged in advance in such a manner that the main reinforcement of the beam is projected from the side of the column steel frame to a length of approximately 1/2 of the span,
After constructing the column steel frame, suspend the beam steel frame between the column steel frames, erection between the column steel frames, and connect the beam main bar end parts that abut each other between the column steel frames to each other. Pre-assembled rebar construction method.