JP2002089042A - Construction method for steel framed reinforced concrete structure wall and hoisting device for steel framed reinforced concrete form unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a construction method for a steel framed reinforced concrete structure wall capable of assembling steel frame, reinforcing bar, and form of the steel framed reinforced concrete wall in satisfactory work environment without relying on a professional worker to reduce personnel expenses and construction manhour and shorten a construction period and provide a hoisting device capable of preventing the deformation of a steel framed reinforced concrete form unit, when hoisting the unit. SOLUTION: When the steel framed reinforced concrete structure wall is constructed, all the steel frames 11 and reinforcing bars 12 are assembled into a predetermined shape in an assembly yard in advance, then a form 20 for placing concrete is integrally attached around these assembled steel frames 11 and reinforcing bars 12 to form the steel framed reinforced concrete form unit 10, which is conveyed and is arranged at an installation planned position of the steel framed reinforced concrete structure wall, and then concrete is placed in the form 20.

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 reinforced concrete wall and a lifting device for a steel reinforced form unit.

[0002]

2. Description of the Related Art Conventionally, for example, when a steel-framed reinforced concrete wall of a multi-story floor is constructed, a steel frame assembling work, a reinforcing-bar assembling work, and a formwork assembling work are separately and sequentially performed at each floor. However, when all the assembly works are performed separately on each floor as described above, the next assembly work is performed after a certain assembly work is completed, so that the number of work steps tends to increase.

[0003] Therefore, the steel frame and the reinforcing steel of the wall are assembled in advance in an assembly factory or the like to form a unit, the steel reinforcing steel unit is hung on each floor and arranged at a predetermined position, and a formwork is formed around the steel reinforcing steel unit on each floor. Therefore, a method of casting concrete into the formwork has also been performed.

[0004]

However, in the past, even when the steel frame and the rebar were unitized in advance, the formwork was still assembled at the installation site of the wall, so that the working environment was poor, and the work at high places and complicated Intensive work was required, so we had to rely on specialized workers with special skills. For this reason, it has not been possible to solve the problem that the labor cost and the number of construction steps are still increased and the construction period is long.

[0005] Further, after the steel rebar unit is placed at the installation site of the wall, it is difficult to join the rebar to surrounding members to be joined such as columns. This is because, when the steel frame and the rebar are unitized, the space occupied by the steel frame rebar unit becomes large, and the space between the steel frame rebar unit and the member to be joined becomes narrow, so that the joint between the steel frame rebar unit and the member to be joined is made. This is because work is restricted.

Further, when the steel rebar unit assembled in an assembly yard or the like is moved to a position where the wall is to be installed, it is necessary to lift the unit. However, if the steel rebar unit is simply lifted using a wire, the wire is hung. A large load was applied to the provided reinforcing bar, and the reinforcing bar could be deformed. Therefore, a lifting device capable of preventing deformation of the steel frame form unit when lifting the steel frame unit has been desired.

SUMMARY OF THE INVENTION An object of the present invention is to solve such a problem, and it is an object of the present invention to construct a steel reinforced concrete wall in a favorable working environment and without relying on a specialized worker. The construction method of steel-framed reinforced concrete walls that can reduce labor costs and construction man-hours and shorten the construction period, and prevent deformation of steel-framed formwork units when lifting steel-framed formwork units It is to provide a possible lifting device.

[0008]

SUMMARY OF THE INVENTION The present invention relates to a construction method and a lifting apparatus for a steel-framed reinforced concrete wall, and is constituted as follows to solve the above-mentioned technical problems. That is, the construction method of the steel reinforced concrete wall of the present invention, when constructing a steel reinforced concrete wall,
After assembling almost all steel frames and reinforcing bars of the steel reinforced concrete wall in a predetermined shape in an assembly yard or the like in advance, a formwork for concrete casting is integrally attached around these assembled steel frames and reinforcing bars. A steel rebar form unit is formed, and the steel rebar form unit is conveyed and placed at a position where the steel-framed reinforced concrete wall is to be installed, and then the concrete is poured into the form.

Further, the present invention is a lifting device for a steel frame form unit for lifting the above-mentioned steel frame form unit, comprising a plurality of holding members for holding a part of the steel frame form unit. A horizontal member that suspends the plurality of holding members at appropriate intervals from each other, and the holding member is a gate-shaped upper frame member that is fitted and locked on an upper side of the steel frame form unit. A wire member provided at a lower end portion of the upper frame member and wound around a lower side of the steel frame form unit, and a length adjusting means for adjusting a length of the wire member. I do.

According to the method of constructing a steel-framed reinforced concrete wall of the present invention, substantially all the steel frames, the reinforcing bars, and the formwork of the steel-framed reinforced concrete wall are assembled in advance in an assembly yard or the like to form a steel-framed formwork unit. Therefore, the working environment is better than when assembling on site, and the posture and assembly procedure of the steel reinforced formwork unit can be changed arbitrarily. The work of assembling the steel frame, the reinforcing bar, and the formwork at the planned installation position of the steel plate becomes unnecessary.

According to the apparatus for lifting a steel frame form unit of the present invention, since a plurality of portions of the steel frame form unit are lifted while being held by the upper frame member, one holding member and this holding member are provided. Since the load applied to a part of the steel frame form unit held by the steel frame is dispersed, the steel frame form unit can be prevented from being deformed.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of a method for constructing a steel reinforced concrete wall and a lifting device for a steel reinforced form unit according to the present invention will be described below in detail with reference to the drawings.

According to the present invention, when constructing a steel reinforced concrete wall, almost all the steel frames and reinforcing bars of the steel reinforced concrete wall are assembled in a predetermined shape in advance, and then concrete is cast around the assembled steel frames and reinforcing bars. A steel frame rebar form unit is formed by integrally attaching the formwork for installation, the steel frame rebar form unit is transported and placed at the position where the steel frame reinforced concrete wall is to be installed, and then concrete is poured into the frame. It is supposed to.

Here, a case in which a wall 40 with beams (FIG. 6) is constructed as an example of a steel reinforced concrete wall will be described. FIG. 1 is a cross-sectional view showing the steel frame form unit 10 of the wall 40 with beams. Prior to constructing the beam-attached wall 40 on site, the U-shaped steel frame formwork unit 10 is preliminarily assembled in an assembly yard at substantially all of the steel frames 11 and 11 and the reinforcing bar 1.
After assembling 2, 12 into a predetermined shape, these steel frames 1
1 and 11 and rebars 12 and 12 are integrally provided with formwork 20 for casting concrete.

As shown in FIG. 2, the reinforcing bars 12, 12 are arranged at an appropriate interval from each other. Steel frame 11, 1
Reference numeral 1 denotes a steel frame for a beam, which is mounted so as to protrude above the reinforcing bars 12, 12. This steel frame 11, 11
For example, a channel steel is used.

A plurality of beam reinforcing bars 13 are arranged around these steel frames 11, 11 along the longitudinal direction.
A stirrup bar 14 is wound around these beam main bars 13. A plurality of plates 15 are provided on the upper side of the steel frames 11 and 11 to support the beam main reinforcement 13.
3 are arranged at appropriate intervals from each other along the longitudinal direction.

The reinforcing bars 12, 12 are formed by arranging the horizontal weft bars 16, 16 and the vertical warp bars 17, 17 vertically and horizontally. The wall warps 17 on both sides are formed by bending a single reinforcing bar at the center. As shown in FIG. 1, the formwork 20, 2 is located outside the reinforcing bars 12, 12 and the stirrup bars 14 at a position separated by a predetermined distance.
0 is arranged. These molds 20, 20 are provided with steps at positions corresponding to the upper and lower ends of the stirrup streaks 14.

The form frames 20 on both sides are fixed by a rod-shaped connecting member 21 while maintaining a predetermined interval. Crosspieces 22, 22 are attached to the top and bottom of each connecting member 21 along the entire width of the molds 20, 20, in order to prevent deformation of the molds 20, 20, respectively.

When assembling the steel frame form unit 10, first, as shown in FIG. 3A, a steel frame 11 and a reinforcing bar 12 are assembled. Next, as shown in FIG. 3 (B), formwork 20, 20 is attached to both sides of steel frame 11 and reinforcing bar 12. In this case, after connecting the connecting member 21 to one of the molds 20, the mold 20 is
Attach to Next, the remaining mold 20 is inserted into the connecting member 21 and attached.

After assembling the steel frame form unit 10, as shown in FIG. 3 (C), the steel frame form unit 10 is lifted up using the lifting device 25 of the steel frame form unit. As shown, the installation position of the beam-attached wall 40 (FIG. 6), here, a steel reinforced concrete column 41,
It is arranged between 41 steel frame rebar units 42,42. The steel rebar units 42, 42 are assembled in advance.

The lifting device 25 for the steel frame form unit includes:
As shown in FIG. 4, a plurality of holding members 26 for holding a part of the steel frame form unit 10 and a horizontal member 27 for suspending the plurality of holding members 26 at appropriate intervals are provided. .

As shown in FIG. 5, the holding member 26 includes a frame-shaped upper frame member 28 which is locked on the upper side of the steel frame form unit 10, and a wire provided at the lower end of the upper frame member 28. 29. The wire 29 is wound around the lower side of the steel rebar form unit 10. This wire 29
As a length adjusting means for adjusting the length, a turnbuckle 30 with a wire falling prevention is provided.

The upper frame member 28 has a gate-shaped portion 31 formed by, for example, an angle, and a chevron-shaped portion 32 provided on an upper side thereof. In the middle part of the gate-shaped part 31,
In order to be locked to the formwork 20 of the steel frame formwork unit 10, a projection 33 projecting inward is provided.

The lifting device 25 for the steel frame form unit
Is attached to the steel frame form unit 10, first, the protrusions 33 of the upper frame member 28 are attached to the steel frame form unit 1.
The upper frame member 28 is locked at a predetermined position on the reinforced steel frame unit 10 by being placed on the upper end of the 0 form 20.

Next, with the joint member 34 provided on the turnbuckle 30 side of the wire 29 removed, the wire 29
Is wound around the lower side of the steel frame form unit 10. At this time, the reinforcing bar 1 is placed on the bottom of the steel frame form unit 10.
A protection member 35 for protecting 2 is applied.

Thereafter, the joint member 34 is connected, and the turnbuckle 30 is operated to tighten the wire 29. As a result, the wire 29 is wound around the lower part of the steel frame form unit 10 without slack, and the holding member 26 is securely attached to the steel frame form unit 10 without play.

Similarly, after all the holding members 26 are attached to the steel rebar form unit 10 at a fixed interval from each other, as shown in FIG. Attach to member 27. And
By lifting the horizontal member 27 with a crane or the like,
While maintaining the steel frame form unit 10 in the normal posture, the installation position of the wall 40 with beams, here, the steel frame unit 4 of the steel framed reinforced concrete column members 41, 41.
2 and 42.

Since the lifting device 25 lifts a plurality of portions of the steel frame form unit 10 by the plurality of holding members 26, one holding member 26 and a part of the steel frame form unit 10 held thereby are lifted. , The deformation of the steel frame form unit 10 can be prevented.

After arranging the steel rebar form unit 10 in a predetermined position, as shown in FIG. 6, the rebar 12 of the steel rebar form unit 10 and the steel rebar units 42, 42 of the column members 41, 41 are connected. Connecting.

However, the steel frame form unit 10 is not provided with connecting members for connecting the column members 41, 41 to the steel frame units 42, 42. Therefore, here, a plurality of lap joint bars 43 and beam joint bars 44 are connected to the reinforcing bar 12 and the beam main bar 13 as joining reinforcing bars, and these lap joint bars 43 and beam joint bars 44 are connected to the steel members of the column members 41, 41. The rebar units 42 are connected to the rebar units 42.

When connecting the lap joint bar 43 to the bar 12 of the steel frame unit 10, as shown in FIG.
A plurality of setup vertical stitches 45 located on the opposite side of the wall vertical streak 17 are attached to the end of the second wall horizontal streak 16. And
As shown also in FIG. 8, the lap joint bar 43 is inserted between the setup vertical bar 45 and the wall vertical bar 17, and the lap joint bar 43 is placed on the horizontal wall bar 16.

Then, the lap joint bar 43 is fixed to the wall warp bar 16, the vertical bar 17, and the setting vertical bar 45 with a binding wire or the like. As shown in FIG. 6, the lap joint bar 43 is inserted deeper than the center of the steel frame rebar unit 42 of the column member 41, placed on the column hoop bar 46, and fixed with a binding wire or the like.

The above-mentioned beam joint bar 44 is L-shaped, and its horizontal portion 47 penetrates the steel frame 48 of the steel frame bar 42 and is fixed to the beam main bar 13 of the wall 40 with beams by a binding wire. Also, the vertical portion 49 of the beam joint bar 44 is arranged downward as an anchor.

Thus, the steel frame form unit 1
0, and the steel frame unit 42 of the column member 41 are joined, and as shown in FIG. 6, a column formwork 50 is arranged around the steel frame unit 42 of the column member 41, Concrete 51 is cast into the formwork 20 of the steel frame formwork unit 50. Then, after curing the concrete 51, by removing the formwork 20, 50,
The construction of the steel reinforced concrete column member 41 and the wall 40 with the steel reinforced concrete beam is completed.

As described above, according to the method for constructing a steel reinforced concrete wall according to the present invention, after assembling substantially all the steel frames 11 and the reinforcing bars 12 of the beam-attached wall 40 in an assembly yard or the like in advance, this assembly is performed. Steel frame 11 and reinforcing bar 1
Since the steel frame rebar assembling unit 10 is formed by integrally attaching the concrete casting formwork 20 to the periphery of the work 2, the working environment is improved as compared with the case of assembling on site. Therefore, since the posture of the steel frame form unit, the assembling procedure, and the like can be arbitrarily changed, work at a high place or complicated work can be eliminated.

Therefore, it is not necessary to assemble the steel frame 11, the reinforcing bar 12 and the formwork 20 at the site, and also, when assembling the steel frame form unit 10 in the assembly yard, a specialized worker having special skills is required. Therefore, the work can be performed by ordinary workers without depending on the cost, so that the cost can be reduced by reducing the labor cost and the number of construction steps, and the construction period can be shortened.

Further, after the steel frame form unit 10 is arranged at the installation site of the wall 40 with beams, the wall reinforcement 1
6 and the beam reinforcing bar 13 are connected to the lap joint bar 43 and the beam joint bar 44, respectively, and these lap joint bar 43 and the beam joint bar 44 are connected to the steel rebar unit 42 of the column member 41.
Connection, the joining operation becomes easy.

In the above-described embodiment, the case where the present invention is applied to the wall 40 with a beam has been described. However, the present invention is not limited to this. It can be applied to various steel-framed reinforced concrete walls such as walls attached to

[0039]

As described above, according to the method of constructing a steel reinforced concrete wall of the present invention, almost all steel frames and reinforcing bars of the steel reinforced concrete wall are assembled into a predetermined shape in an assembly yard or the like. Formwork unit is formed by integrally attaching a concrete casting formwork around the steel frame and the rebar, so that the working environment is better than when assembling on site, and the steel frame, rebar and The assembling work of the mold is facilitated. In addition, since the work of assembling the steel frame, the reinforcing bar, and the formwork at the installation site of the steel-framed reinforced concrete wall is not required, work at a high place and complicated work can be eliminated.

Therefore, the steel reinforced concrete wall can be constructed by ordinary workers without relying on specialized workers having special skills, so that labor costs and the number of man-hours are reduced, and the construction period is shortened. Can be achieved.

Further, after the steel frame form unit is placed at the position where the steel-framed reinforced concrete wall is to be installed, the reinforcing bar is attached to the reinforcing bar, and the reinforcing bar for connection is mounted. Joining work becomes easy.

Furthermore, according to the apparatus for lifting a steel frame form unit of the present invention, the steel frame form unit is lifted while being held by a plurality of holding members arranged at a predetermined interval from each other. The load applied to the holding member and a part of the steel frame form unit held by the holding member is dispersed, and the steel frame form unit can be prevented from being deformed. Further, since the wire can be strongly tightened by the length adjusting means, the wire can be securely attached to the steel frame form unit without rattling.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a steel frame form unit used in a method of constructing a steel frame reinforced concrete wall according to the present invention.

FIG. 2 is a cross-sectional view showing an assembled state of steel frames and reinforcing bars of the steel frame form unit according to the present invention.

FIG. 3 is a diagram illustrating an assembly process of a steel rebar unit according to the present invention.

FIG. 4 is a view taken in the direction of arrow A in FIG. 1;

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

FIG. 6 is a sectional view taken along line CC of FIG. 4;

FIG. 7 is a view showing a method of attaching a joining member of the steel frame form unit of the present invention.

FIG. 8 is a sectional view taken along the line DD of FIG. 6;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Steel frame form unit 11 Steel frame of beam with a beam 12 Steel bar of a wall with a beam 16 Wall horizontal bar 17 Wall vertical bar 20 Formwork 25 Lifting device of a steel frame form unit 26 Holding member 27 Horizontal member 28 Upper frame member 29 Wire 30 Turnbuckle (length adjustment means) 40 Wall with beam 43 Lap joint (reinforcing bar) 45 Vertical stitch for setup 51 Concrete

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Shinji Kawai Maeda 2-10-26 Fujimi, Chiyoda-ku, Tokyo Maeda Construction Industry Co., Ltd. F term (reference) in Construction Industry Co., Ltd. 2E174 AA01 BA05 CA03 DA12 DA13 DA14

Claims (4)

[Claims] When constructing a steel-framed reinforced concrete wall, substantially all of the steel frame and the reinforcing bar of the steel-framed reinforced concrete wall are assembled in a predetermined shape in an assembly yard or the like, and then around the assembled steel frame and the reinforcing bar. Forming a steel rebar form unit by integrally attaching a formwork for concrete casting to the steel frame, transferring the steel rebar form unit to a place where the steel-framed concrete wall is to be installed, and then A method for constructing a steel-framed reinforced concrete wall, wherein the concrete is poured into the concrete wall. 2. The method according to claim 1, wherein the wall is a wall with a beam. 3. The reinforcing bar is formed by arranging a horizontal wall reinforcement and a vertical wall reinforcement vertically and horizontally, and after arranging the steel frame reinforcing form unit at a construction site, setting up the end of the wall horizontal reinforcement. A vertical reinforcing bar is attached, a connecting reinforcing bar is inserted between the setup vertical bar and the wall vertical bar, the connecting reinforcing bar is connected to the wall horizontal bar, and the connecting reinforcing bar is attached to the surrounding member. The method for constructing a steel-framed reinforced concrete wall according to claim 1 or 2, wherein the method is connected to a reinforcing bar. 4. A lifting apparatus for a steel frame form unit for lifting a steel frame form unit according to claim 1, comprising a plurality of holding members for holding a part of the steel frame form unit. A horizontal member that suspends the plurality of holding members at appropriate intervals from each other, and the holding member is a gate-shaped upper frame member that is fitted and locked on the upper side of the steel frame form unit. A wire member provided at a lower end portion of the upper frame member and wound around a lower side of the steel frame form unit; and a length adjusting means for adjusting a length of the wire member. Lifting equipment for steel frame formwork units.