JPH06167114A - Prefabricated beam-column structure of reinforcements and application by use thereof - Google Patents

Abstract

PURPOSE:To efficiently and safely carry out construction work, by arranging even the beam-main reinforcements so as to cross the column-main reinforcements and arranging the beam-main reinforcements to vertically and freely slide within the upper limit of a branch stopper fixed at the nearby position of the upper end of the column- main reinforcements. CONSTITUTION:The lowerend side of a column-main reinforcement 4 is inserted in a lower working tool 1 and the upper end side is temporarily fixed in a lowerworking tool 2 to erect vertically the column-main reinforcements 4 and further, temporary hoops are fixed at the upper end of the column-main reinforcements 4 to form a slipping-off stopper 10. Next, stirrups 12 are wound at the upper end main reinforcements 6a and the lower end main reinforcements of the beam arranged so as to cross the column-main reinforcements 4 and fixed thereto to form the beam-main reinforcements 13 to vertically and freely slide to assemble a preconstructed beam- column structure of reinforcements. Next, the beam-main reinforcements 13 is lifted up by a crane or the like to the level where the upper end of main reinforcements 6 gets in contact with the slipping-off stopper 10 and the prefabricated beam-column structure of reinforcements is suspended into the location area of the building.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a column-beam pre-assembled rebar body and a pre-assembled rebar construction method using the same.

[0002]

2. Description of the Related Art In a reinforcing bar assembly work area provided near a building construction position, a beam-column front assembly is constructed by erection of a beam main bar group arranged in a state of traversing the column main bar group between two column main bar groups. A prefabricated reinforcing bar construction method in which a reinforcing bar body is assembled and is suspended at a building construction position by a lifting machine is already known.

However, in the above-mentioned conventional example, when assembling the post-beam pre-assembled rebar body by the reinforcing bar assembling work area, if the assembling work is performed with the column main bar group standing vertically, the assembly of the beam main bar group is at a high position. In addition to the need for large-scale scaffolding and not only poor work efficiency,
There was a safety problem due to the large amount of work in high places. In addition, in order to avoid the danger of working at heights, it is possible to assemble the column-beam-end-reinforcement bars with the column main reinforcement group lying down.In this case, the area required for the assembly work is However, when assembling a plurality of column-beam-end assembled reinforcing bars in parallel, an enormous reinforcing bar assembly work area is required.

[0004]

SUMMARY OF THE INVENTION The present invention has been made with the above points in mind, and an object of the present invention is to efficiently perform the work of assembling the column-beam-end assembled rebar body in a small area. An object of the present invention is to provide a column-beam pre-assembled rebar body that can be safely performed and a pre-assembled rebar construction method using the same.

[0005]

The technical means taken by the present invention to achieve the above object are as follows. That is, the post-beam pre-assembled rebar body according to the first aspect of the present invention is a column main bar group positioned vertically in a predetermined bar arrangement state and a state in which the bar bar crosses the bar main bar group at a position lower than the beam bar predetermined position. And a retaining member fixed near the upper end of the column principal reinforcement group, and the beam principal reinforcement group is configured to be vertically slidable with the retaining device as an upper limit.

In the prefabricated reinforcing bar construction method according to the second aspect of the present invention, a column main bar group that is positioned in a predetermined bar arrangement state and is made to stand vertically at a position other than the building construction position and a position lower than the beam bar predetermined position. Beam main bar group arranged to cross the column main bar group,
Assemble a column-beam-end assembled rebar body that is composed of a retaining tool fixed near the upper end of the column main reinforcement group, and the beam main reinforcement group is configured to be slidable in the vertical direction with the retaining tool as the upper limit. The feature is that the braided bar is suspended at the building construction position.

[0007]

According to the above construction, since the column beam front assembly rebar body is assembled in a state where the column main reinforcing bar group is erected vertically, the area required for the assembly work can be small. Even when the bodies are assembled in parallel, the vast area for assembling the reinforcing bars is unnecessary, and yet the assembly work of the beam main bar group can be performed efficiently and safely because it is performed at a low position. When suspending the pillar-beam tip rebar body with a lifting machine at the building construction position, by lifting the beam main reinforcement group,
The beam main bar group slides upward with respect to the column main bar group to a position where the beam main bar group hits the retainer, and the column main bar group is also integrally lifted. In addition, since the beam main bar group is vertically slidable with respect to the column main bar group, the column-beam front braided rebar body is hung at the building construction position to fix the bottom end of the column main bar group and the beam main bar group. At the time of performing, it is possible to easily adjust the level of the beam main bars and join the lower end of the column main bars.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows an example of a post-beam pre-assembled rebar body according to the present invention and a column main bar positioning device A used in a pre-assembled rebar construction method using the same. This column main bar positioning device A is a lower jig 1 for positioning the lower end side of the column main bar group in a predetermined bar arrangement state.
And an upper jig 2 for positioning the upper end side of the column main bar group in a predetermined bar arrangement state, and a square pipe 3 for supporting the upper jig 2 on the lower jig 1 in a fixed posture and detachably. Has been done.

The lower jig 1 includes a rectangular frame 1a made of an angle member and a connecting frame 1b laid between the central portions of its long sides, and the upper and four sides of the four corners of the frame 1a. The vertical cylinders 1c, which are arranged on the upper surface of the column and are fixed by means such as welding, in the same number as the number of column main bars (12 in this embodiment) and the upper surface of the central portion of the connecting frame 1b. It is composed of a square pipe 1d and
As shown in FIG. 3, by inserting the lower ends of the column main reinforcements 4 into the cylindrical body 1c, the lower end side of the column main reinforcements is positioned. Further, the lower end side of the square pipe 3 is inserted into the sheath pipe 1d so as to be freely inserted and removed.

The upper jig 2 is a grid-shaped member 2 composed of a rectangular peripheral frame and a plurality of linear frames perpendicular to the rectangular peripheral frame.
a, a horizontal rod 2b made of an angle member or the like fixed to the central portion thereof, and a sheath pipe 2c made of a square pipe suspended from the lower surface of the central portion of the horizontal rod 2b. In the state where the upper end side of the pipe 3 is fitted, the four corners of the rectangular peripheral frame of the grid-shaped member 2a and the corners formed by the rectangular peripheral frame and the linear member are directly above each of the tubular bodies 1c. It is supposed to be located. Then, as shown in FIGS. 3 and 4, the upper end of the column main bar 4 is inserted by inserting the upper end side of the column main bar 4 into a predetermined position of the lattice member 2a and temporarily fixed with a binding line (not shown). The side is positioned.

It is desirable that the upper jig 2 be temporarily fixed to the column main bar 4 at a position higher than the upper end level of the beam to be constructed. In this way, as will be described later, the upper jig 2 can be recovered after the concrete of the beam or the pillar has been cast. In addition, the upper jig 2 can be used to prevent displacement of the upper end side of the column main bar group during concrete pouring.

FIG. 2 shows a pedestal B used in the work of assembling the beam main bar group. A plurality of pairs of the gantry B are installed at intervals in the beam width direction, and the upper and lower main reinforcements 6a of the beam are supported by the knotted reinforcements 5 laid between the upper ends of the pedestal B. Each pedestal B is made of an angle material or the like, and has a column portion 8 formed with a concave portion 7 for stably mounting the kanzashi muscle 5 on its upper edge and a stable installation continuously provided at its lower end. And a cross-shaped grounding portion 9 for Incidentally, the kanzashi muscle 5 may use a single pipe.

Next, a column-beam pre-assembled rebar body and a pre-assembled rebar construction method using the same will be described. First, a required number of the above-described pillar main bar positioning device A and gantry B are installed at a predetermined position of the reinforcing bar assembling work area provided near the building construction position. Then, as shown in FIGS. 3 and 7, the lower jig 1
The lower end side of the column main reinforcement 4 is inserted into the column, and the upper end side is temporarily fixed to a predetermined position of the upper jig 2 with a binding wire.
... is made to stand vertically, and the vicinity of the upper end of each column main bar group (specifically, the upper main bar 6a of the beam in the state where the beam is constructed)
At a position slightly higher than that), a temporary hoop bar made of deformed reinforcing bar is wound and fixed to form a retaining device (10) for the main beam bar group.

It is to be noted that the necessary number of hoop muscles 11 are fixed in advance to the lower end side of the column main bar group with a binding wire in a dense state. Although the welding and binding wires may be used to fix the retainer 10 to the column main bar 4, in this embodiment, a crimp-type rebar-fixing hardware C as shown in FIGS. 5 and 6 is used. There is.
The metal C is fitted to the intersection of the column main bar 4 and the retainer 10, and the outer periphery is tightened with a tool to plastically deform, whereby a part of the metal C is used as the column main bar 4 and the retainer 10. Engage in the ribs of the deformed bar used,
The stopper 10 and the metal C are configured so as to be integrated. The hardware C shown in FIG. 5 is used at the intersection of the straight line portion of the retainer 10 and the column main bar 4. Hardware C shown in FIG.
Are used at the intersections of the corners of the retainer 10 and the column main bars 4, and only the point where the portion to be crimped to the retainer 10 is bent at a right angle in plan view is It differs from C.

Then, as shown in FIGS. 3 and 4, the upper end main bar 6a and the lower end main bar 6b of the beam arranged at a position lower than the stopper 10 and in a state of traversing the column main bar group and fixed around them. A pillar-beam tip assembled rebar body (14) including a beam main bar group (13) composed of a stirrup (12) and vertically slidable is assembled.

More specifically, as shown in FIG. 7, the stirrup 12 is supported by the upper main stirrup 6a of the beam erected on the pedestal B through the knotted streak 5, and the stirrup 12 is supported.
The lower end main bar 6b of the beam is inserted into 12 and supported. D in the figure is a concrete block that supports the stirrup 12.

In this state, as shown in FIG. 8, the stirrup 12 is expanded to a predetermined pitch and fixed to the upper end main bar 6a and the lower end main bar 6b with binding wires or the like to assemble the beam main bar group 13. Since this assembly work is in a low position, it is performed without using a temporary scaffold or the like. The stirrup 12 may be expanded to a predetermined pitch before the lower end main bar 6b is inserted. The specific procedure in that case is as follows. Place the stirrup 12 on the concrete block D.
The upper main bar 6a is inserted and supported by the gantry B. Place the stirrup 12 in place. The lower end main bar 6b is inserted and fixed.

After that, as shown in FIGS. 9 and 10, the column-beam-end assembled rebar body 14 is suspended at a building construction position by a lifting machine such as a crane. In this case, the pillar-beam pre-assembled rebar body
14, the beam main bar group 13 is configured to be slidable in the vertical direction with respect to the column main bar group, and the retainer 10 is fixed near the upper end of the column main bar group. By lifting, as shown in phantom lines in FIG. 3, the beam main bar group 13 slides upward with respect to the column main bar group until the upper end main bar 6a of the beam hits the temporary hoop bar 10, and as shown in FIG.
The main pillar groups will also be lifted together.

The lower jig 1 and the square pipe 3 are left in the reinforcing bar assembling work area by lifting the post-beam pre-assembled reinforcing bar body 14 and are diverted to the next assembling work. The upper jig 2 is carried to the building construction position while being attached to the main pillar group, and after the concrete is placed, it is collected and diverted to another assembling work.

The column-beam front-end rebar body 14 hung at the building construction position is provided with a large number of posts (not shown) provided with screw-type jack mechanisms for a single-bar pipe that supports the beam upper end bar. ), And the beam mechanism by the jack mechanism
After performing the level adjustment of 13, as shown in FIG. 11, the lower end of the column main bar group is joined to the upper end of the column main bar group that was constructed in advance by a mechanical joint, etc. The beam main reinforcement group 13 is fixed to the column main reinforcement 4 by a binding line or the like while being expanded to a predetermined pitch and fixed with a binding line or the like, or is fixed to a predetermined level by joining the beam main reinforcement group constructed in advance. To do. The post is to be removed after constructing a beam formwork, supporting it by supporting work.

In the above embodiment, all the stirrup 12 is fixed to the upper end main bar 6a and the lower end main bar 6b of the beam to constitute the beam main bar group 13 in which predetermined bar arrangement is completed. , A part of the stirrup 12 is fixed, and the rest of the stirrup 12 is fixed at an appropriate time (for example, after suspending the column beam tip assembled rebar body 14 at the building construction position). Good.

[0022]

As described above, according to the present invention, since the column beam-end pre-assembled rebar body is assembled in a state where the column main bar group is erected vertically, the area required for the assembly work can be small, and Even when assembling the column-beam-end assembled rebar bodies in parallel, a vast rebar assembly work area is not necessary, yet the work of assembling the beam main rebar group is performed at a low position, so that the work can be performed efficiently and safely. In addition, since the beam main bar group is vertically slidable with respect to the column main bar group with the retaining device as the upper limit, the column beam front assembled rebar body is hung at the building construction position and the lower end of the column main bar group is fixed or When fixing the beam main bar group, there is an advantage that the level adjustment of the beam main bar group and the joining work of the lower end of the column main bar can be easily performed.

[Brief description of drawings]

FIG. 1 is a perspective view of a column beam pre-assembled rebar body according to the present invention and a column main bar positioning device used in a pre-assembled rebar construction method using the same.

FIG. 2 is a perspective view of a gantry used for an assembly operation of a beam main bar group.

FIG. 3 is a side view of a post-beam pre-assembled rebar body.

FIG. 4 is a plan view of a post-beam pre-assembled rebar body.

FIG. 5 is a perspective view of a hoop muscle fixing hardware.

FIG. 6 is a perspective view of a hoop muscle fixing hardware.

FIG. 7 is a schematic side view for explaining a post-beam pre-assembled rebar body according to the present invention and a pre-assembled rebar construction method using the same.

FIG. 8 is a schematic side view for explaining a process following the process in FIG.

FIG. 9 is a schematic side view for explaining a process following the process in FIG.

FIG. 10 is a schematic side view for explaining a process following the process in FIG.

FIG. 11 is a schematic side view for explaining a step following FIG.

[Explanation of symbols]

4 ... Column main bar, 6a ... Beam upper end bar, 6b ... Beam lower end bar, 10 ... Stopper, 12 ... Stirrup, 13 ... Beam main bar group,
14… Post-beam pre-assembled rebar body.

Claims (2)

[Claims] 1. A column main bar group positioned in a predetermined bar arrangement state and made to stand vertically, a beam main bar group arranged at a position lower than a predetermined position of the beam bar and traversing the column main bar group, and a column A column-beam pre-assembled rebar body, comprising a retaining member fixed to a portion near an upper end of a main bar group, and the beam main bar group is configured to be vertically slidable with the retaining member as an upper limit. 2. A column main bar group positioned in a predetermined bar arrangement state and made to stand vertically in a place other than the building construction position, and a state in which the beam bar crosses the column main bar group at a position lower than the beam bar predetermined position. A column-beam-pre-assembled rebar body composed of arranged beam main reinforcements and retaining members fixed near the upper end of the column main reinforcements, and the beam main reinforcements are configured to be vertically slidable with the retaining members as the upper limit. The pre-assembled rebar construction method characterized by assembling the above and suspending this column-beam pre-assembled rebar body at the building construction position.