JP2904752B2 - Construction method of reinforced steel frame of reinforced concrete building - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION A reinforcing steel frame in the form of a rectangular frame is installed between the upper and lower layers of an existing reinforced concrete building to improve the earthquake resistance of the reinforced concrete building. The present invention relates to a method of building such a reinforced steel frame into a reinforced concrete building.

[0002]

2. Description of the Related Art A steel frame divided into several members at the site, that is, between upper and lower layers, is bolted to each other, assembled into a frame, and built by a crane and human power.

[0003]

In the prior art, a steel frame is assembled in a narrow space of a site, that is, in a reinforced concrete building, and in a place where facilities are not provided. Since the reinforced steel frame is installed, workability is poor and there is a problem in safety.

The present invention pays attention to such a conventional example, and aims to provide a method of embedding a reinforcing steel frame of a concrete building, which is excellent in workability, high in safety, and can shorten the construction period on site. It was created for the purpose.

[0005]

Means for Solving the Problems A pair of fixing temporary pillars are installed between the upper and lower layers by detachably fixing the ends to the upper and lower layers of the concrete building. After engaging the reinforcing steel frame between the upper and lower layers and detachably attaching and supporting the temporary column for fixing,
The basic means is that the reinforcing steel frame is directly fixed to the upper and lower layers, and then, the temporary fixing column is removed from the concrete building and the reinforcing steel frame.

[0006]

BRIEF DESCRIPTION OF THE DRAWINGS The drawings show an example of an apparatus to which a method of embedding a reinforcing steel frame of a concrete building according to the present invention is applied,
FIG. 1 is a perspective view just before the reinforcing steel frame is built, and FIG.
FIG. 3 is a cross-sectional view of a state in which the reinforcing steel frame is fixed to a concrete building. FIG. 3 is a perspective view of a device used for installing the reinforcing steel frame in the concrete building.

In the embodiment, a pair of fixing temporary columns 1, 1
Is removably fixed to a concrete building B, and a reinforcing steel frame 3 to which the upper and lower joint parts 2A and 2B are removably fixed is erected using a gantry 4 and the reinforcing steel frame 3 is connected to the joint part 2A, 2B, the fixing temporary column 1 is fixed by bolts and nuts.
2 and 1 and filling the mortar 4 between the reinforcing steel frame 3 and the concrete building B and reinforcing the steel frame 3
Is fixed to the concrete building B, the temporary fixing column 1 and the joint parts 2A, 2B are removed from the concrete building B or the reinforcing steel frame 3, and the method is completed.

The temporary fixing column 1 is a main rod 1 made of steel (shape steel).
A base 1b made of an iron plate is welded to the lower end of the main building 1a. At the upper end of the main rod 1a, embedded bolts (chemical anchors or mechanicals) projecting from the beam 5 of the upper story B1 of the concrete building B are provided. Anchor 6), and the pedestal 1b has the concrete building B
The insertion holes 7 'of the embedding bolts (chemical anchors, mechanical anchors, etc.) 6' protruding from the slab 5 'of the lower hierarchical portion B2 are respectively provided, and the upper and lower sides of the intermediate portion of the main rod 1a are provided. An insertion hole 7 '' is provided which matches the through hole 8 of the joint component 2A, 2B.

That is, in the temporary fixing column 1, an embedding bolt 6 protruding from the beam 5 of the upper hierarchical portion B1 penetrates through an insertion hole 7 at the upper end of the main rod 1a, and a nut 10 is screwed into this. Further, an embedded bolt 6 ′ protruding from the slab 5 ′ on the side of the lower layer portion B 2 is passed through an insertion hole 7 ′ provided in the pedestal 1 b, and a nut 10 ′ is screwed and fastened to the upper and lower sides. Of the concrete building B (the upper story B1 and the lower story B) by loosening the nuts 10 and 10 '.
2) It can be removed more.

The joint parts 2A and 2B are formed by attaching a reinforcing frame 3b to a rectangular main frame 3a formed by welding and welding a steel frame (such as a section steel).
Bolts 11 and nuts 12 on the upper frame 3 ′ and the lower frame 3 ″.
It is fastened so that it can be removed.

That is, the joint parts 2A, 2B are fastened to the reinforcing steel frame 3 with bolts 11 and nuts 12, and the steel frame 3 suspended by the built-in gantry 4 is fixed to the concrete building B side as described above. Is used for detachably attaching to the fixed temporary column 1, and the through hole 8 provided on the distal end face side is inserted into the insertion hole 7 ″.
And the nut 11 is passed through the bolt 11 '.
The reinforcing steel frame 3 is removably attached to the temporary fixing column 1 by screwing and tightening 2 '.

The gantry 4 is composed of an iron base 4a and steel rods 4b, 4b 'made of a steel frame (shaped steel, etc.), and a receiving piece 16 for hooking a crane hook in place. , 16 ′ provided front and rear, and a pair of constituent rods 4 b, 4 b disposed on both sides of the upper end protrude forward, and the ends thereof can be separated from each other by the upper joint part 2 A and bolts 11 ″ and nuts 12 ″. Through holes 8 for mounting on
'Is provided.

That is, the erection frame 4 is detachably attached to the front ends of a pair of constituent rods 4b, 4b arranged on both sides of the upper end via the upper joint part 4A, and the front support member 4b is provided. After the hook is hooked on the stopper 16 and lifted and moved to the position of the temporary fixing column 1 by a crane, and the joint parts 2A and 2B are tightened by the bolts 11 'and 12' as described above, Is used in such a manner that the bolt 11 '' and the nut 12 '' are detached from the upper joint part 2A, that is, the steel frame 3, and the concrete building B, that is, the upper story portion. Reinforced steel frame 3 between B1 and lower layer portion B2
And hold the steel frame 3 until the frame 3 is fixedly supported on the temporary fixing column 1.

The reinforcing steel frame 3 is fixed to the temporary column 1 for fixing.
And bolts 11 via upper and lower joint parts 2A and 2B.
′ And nut 12 ′ (temporarily), then bolt 11
When the gantry 4 is moved to the ground with a crane by removing the '' and the nut 12 '', the hook of the crane is replaced with the receiving piece 16 'on the rear side from the receiving piece 16 on the front side. Gantry 4 when supported by a crane
It is to balance.

Further, in the embodiment, a pair of temporary columns for fixing is detachably installed between the upper story part and the lower story part of the concrete building, and the reinforcing steel frame can be detached from the temporary pillar for fixing. Since it is supported, the temporary fixing (fixing) of the reinforcing steel frame to the concrete building can be easily and reliably performed.

[0016]

Since the present invention has the above-described structure, it is excellent in workability, high in safety, and can shorten the construction period on site.

[Brief description of the drawings]

FIG. 1 is a perspective view immediately before a reinforcing steel frame is built.

FIG. 2 is a sectional view showing a state in which a reinforcing steel frame is fixed to a concrete building.

FIG. 3 is a perspective view of an instrument used to build a reinforced steel frame into a reinforced concrete building.

[Explanation of symbols]

 B Reinforced concrete building B1 Upper story B2 Lower story 1 Temporary fixing column 3 Reinforced steel frame

Claims (1)

(57) [Claims] 1. A pair of temporary columns for fixation are installed between upper and lower layers of a reinforced concrete building by removably fixing ends to upper and lower layers of the reinforced concrete building. After engaging between the upper and lower layer portions and detachably attaching and supporting the fixing temporary column, the reinforcing steel frame is directly fixed to the upper and lower layer portions, and then the temporary column for fixing is fixed. Removing the reinforced concrete frame from the reinforced concrete building and the reinforced steel frame.