JP3281972B2 - Reinforcing unit and method of constructing reinforced concrete building using the same - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reinforcing bar unit for use in the construction of a reinforced concrete building and a construction method using the same.

[0002]

2. Description of the Related Art In recent years, what is called a core wall type is being studied as a structural type of a reinforced concrete high-rise building having excellent earthquake resistance. This is because a core is provided at the center of a building by a reinforced concrete high-rigidity earthquake-resistant wall (core wall) having a thickness of, for example, 500 mm, and each floor is supported inside and outside the core from the core wall. To form a floor slab.

[0003]

However, when constructing a core-wall type building as described above, the wall thickness of the core wall is much larger than that of a conventional general building. Along with this, the amount of wall reinforcement also becomes enormous, and the concrete strength of the core wall is set to be larger than that of the floor. The technique of simultaneously constructing a wall cannot be adopted as it is, and there is an urgent need to develop an effective means for constructing such a building.

[0004]

SUMMARY OF THE INVENTION In view of the above circumstances, the reinforcing bar unit of the present invention is a wall reinforcing bar unit suitable for use, for example, when constructing a core wall type building. Are supported in a unit body constructed in a lattice shape, and a support tool that supports the floor formwork and is a part of the wall formwork is attached to the position of the joint with the floor. The support in the rebar unit of the present invention is preferably used also as a jig for lifting the rebar unit, and a fixing device embedded in the concrete and integrated with the support and the concrete is attached to the support. It is preferable that a part of the floor reinforcement is attached to the support.

In the construction method of the present invention, when, for example, a core wall type building is constructed using the above-described rebar unit, the rebar unit is erected at a wall forming position and wall concrete is poured into the wall. After the floor is formed in advance, the floor form is supported on the support in the reinforcing bar unit, and the floor form is laid, and after the floor reinforcement, the floor concrete is cast to form the floor. Things.

[0006]

The rebar unit of the present invention is erected collectively at a position where a wall is to be formed, an appropriate wall form is attached around the unit, and wall concrete is poured into the interior to form the wall. To form. Since the support tool attached to the reinforcing bar unit in advance serves as a wall formwork at the wall joint, a troublesome work of assembling the formwork at that portion is unnecessary. In addition, by laying the floor form while supporting it with the support, the work of laying the floor form can be simplified. further,
When lifting the rebar unit, the support can also be used as a hanging jig. The fixing fixture is attached to the support and the floor is arranged on the support to integrate the wall concrete and floor concrete. Is achieved.

According to the construction method of the present invention, a floor is constructed after a wall is constructed using the above-mentioned reinforcing bar unit. In other words, the pre-construction of the wall is performed, and thus the construction of the wall such as a core wall whose wall thickness is sufficiently large and the concrete strength is set higher than the floor can be rationally performed. .

[0008]

Embodiments of the present invention will be described below. First, the rebar unit will be described with reference to FIGS. The rebar unit 1 of the present embodiment is used to form a wall having a thickness of, for example, about 500 mm such as a core wall, and for example, the vertical rebars 2 of about D29 to D38 and D19 to D
25 or more horizontal streaks 3 are connected or welded by a number line to form a lattice-shaped unit main body 4, and the two unit main bodies 4, 4 are arranged facing each other with a predetermined distance therebetween, and integrated.
This is a configuration in which the support tool 5 is attached to a predetermined position on the upper part.

The support 5 becomes a part of the wall formwork,
This is to support the floor formwork when constructing floors formed on both sides of the reinforcing bar unit 1 and also serves as a suspending jig for lifting the reinforcing bar unit 1. Things.

As shown in FIGS. 2 and 3, the support 5 has a pair of left and right side plates 6, 6 each formed of a steel material, and a connecting plate 7 for connecting the side plates 6, 6 to each other. Consists of The side plates 6 and 6 are used as a wall form of a joint part continuously to the wall form F when the wall concrete is cast. The outer side of the side plates 6 and 6 is used as a floor form. Support portions 6a, 6a for supporting the deck plate P to be provided are provided to protrude. The connecting plates 7 are provided at predetermined intervals between the side plates 6 and 6 to connect the side plates 6 and 6 to each other.
Is fixed to the unit main bodies 4 and 4 by connecting and fixing the predetermined horizontal streaks 3 and 3 to the unit main body 4 and 4, and using the ring 8 provided on the connecting plate 7 through the support 5 The entire rebar unit 1 can be lifted by a crane.

A slab reinforcing bar 9, which is a part of a floor reinforcing bar, is arranged inside the support 5 in order to firmly integrate the concrete of the wall and the floor. Has an insertion hole 10 for inserting the insertion line 9. A fixing device 11 for strengthening the fixing of the support 5 to the concrete on the wall and floor is attached to both the inner and outer surfaces of the side plate 6. In this embodiment, a fixing tool 11 obtained by cutting a short reinforcing bar of, for example, about D16 and welding it to the side plate 6 is used, but, for example, a stud or the like may be used.

The shape and size of each part of the support 5 are determined according to the shape and size of the unit body 4 and the design conditions of the wall and floor constructed using the reinforcing bar unit 1. . In this embodiment, an L-shaped steel is used as one (the right side in FIG. 3) side plate 6 and its lower part is used as the supporting portion 6a, and the other (the same as the left side) side plate 6 is made of a strip steel plate. Fix the fixed angle material to the supporting part 6
a, and the level of both support portions 6a, 6a is made different according to the floor level on both sides, but this is an example corresponding to the design conditions, and the specific configuration of the support 5 is Of course, it is not limited to this.

In order to assemble the reinforcing bar unit 1 as described above, as shown in FIG.
Is provided, and the support 5 manufactured in advance is held substantially horizontally on the upper part of the truss gantry 14, and is temporarily connected to the inside of the support 5 through the upper ends of the vertical streaks 2. It is sufficient to connect the horizontal stripes 3 to the vertical stripes 2 in order while preventing them from overturning, and assemble them in a lattice shape.

The rebar unit 1 has been described above. Next, a method of constructing a building using the rebar unit 1 will be described with reference to FIG.
This will be described with reference to FIGS. The construction method described below is for constructing a wall W and a floor S of a core wall type building. The reinforcement unit 1 having a desired arrangement of reinforcing bars is laid, lifted, and built at the installation position. The self-climbing movable form F is used as the wall form, the deck plate P is used as the floor form, and the wall W is constructed prior to the floor S.

FIG. 5 shows a state where the construction of the wall W on the Nth floor is completed. In this state, the movable form F, which is a wall form, has not been removed yet, and is left between the upper and lower supports 5,5. The upper end of the reinforcing bar unit 1 protrudes from the upper portion of the wall W, and the support 5 and the slab reinforcement 9 for the floor construction on the (N + 1) th floor, which is the upper floor, are already provided at the upper end of the wall W. I have. In addition, the construction of the floor on the Nth floor is not completed.
Only the rebar arrangement has been completed, and the floor concrete has not been cast yet.

The construction procedure from the state of FIG. 5 will be described.
As shown in FIG. 6, a reinforcing bar unit 1 for forming a wall of the (N + 1) th floor is laid, lifted by a crane, and a lower end of which is protruded above a wall W of the completed Nth floor. It is joined to the upper end of the unit 1 by welding or a joint.

Next, as shown in FIG. 7, the movable form F is changed from the Nth floor to the (N + 1) th floor. As shown in FIG. 8, a deck plate P, which is a floor formwork for constructing the floor on the (N + 1) th floor, is laid by supporting it on the support 5 at the upper end of the wall W on the Nth floor. Arrange 15 bars. Also, N + 2
The floor slab streaks 9 are attached to the support 5.

Next, as shown in FIG. 9, the wall concrete on the (N + 1) th floor is cast, and the wall W on the (N + 1) th floor is completed. The state shown in FIG. 9 is the same as the state shown in FIG. 5, and thereafter, the same procedure is repeated to construct the walls W of each floor, and the floor of each floor is constructed by laying the deck plate P and reinforcing the floor reinforcing bars 15. Stop arranging the bars.

After the wall W has been constructed to the predetermined floor in this way, floor concrete is cast on the predetermined floor below and the floor S of that floor is constructed. FIG. 10 shows a state in which the floor concrete on the Nth floor and the N + 1th floor is cast and the floor S is formed when the wall concrete on the (N + 1) th floor is cast. What is necessary is just to carry out more than predetermined floors later. That is, when the wall concrete on the Nth floor is cast, for example, the floor concrete on the N-3th floor, which is the lower floor for three floors, may be cast at the same time. It should be noted that the concrete placement on the floors S, S on both sides of the wall W may be carried out at the same time. However, if necessary, the construction time may be shifted, for example, when placing the N-th floor wall concrete. N-3
It is possible to cast one (for example, inside the core wall) of the floor concrete on the floor, and at the same time, to cast the other (the same, outside) of the floor concrete on the N-6 floor. Moreover, depending on the case, it is also possible to pour floor concrete of a plurality of floors simultaneously.

According to the above method, the wall W
And floor S are not constructed at the same time for each floor.
Is constructed earlier than the floor S, so that a building having a large wall thickness such as a core wall type building and in which the concrete strength of the wall W is set to be larger than the concrete strength of the floor S is reasonable. Can be installed on Also,
Reinforcing the wall rebar into a rebar unit 1
, And are arranged at the bar arrangement position at a time, so that even when a large diameter and a large number of reinforcing bars are used, the labor of the bar arrangement work can be greatly reduced.

Moreover, the support 5 provided on the reinforcing bar unit 1
Not only simplifies the work of laying the deck plate P as the floor formwork, but also simplifies the work of the wall formwork because the support tool 5 serves as the wall formwork of the wall joint. ,
Further, the structural integration of the wall W and the floor S can be sufficiently achieved by the fixing tool 11 and the slab streaks 9 provided on the support tool 5.

As described above, the construction method of the present invention is suitable for construction of a building having a large wall thickness such as a core wall, but is not necessarily limited to such a case. It is also applicable to the construction of other types of reinforced concrete buildings, and the specific work procedure can be arbitrarily changed variously as long as the wall is pre-constructed from the floor. is there. For example, in the above-described embodiment, the self-climining movable form F is used. However, a general form can be used instead of the movable form, and the floor form is supported. Not limited to the deck plate P, any other type of floor form can be adopted as long as it can be supported by the tool 5.

[0023]

As described above, the reinforcing bar unit according to the present invention supports the floor form on the unit body in which the vertical and horizontal streaks are assembled in a lattice shape and becomes a part of the wall form. With this configuration, the work of laying the floor formwork can be simplified, and the troublesome work of the formwork of the wall joint can be simplified. If it also serves as a fixture, lifting work can be easily performed, and a fixing device is provided on the support and floor reinforcement is provided there, so that the structural integration of the wall and the floor is sufficient. Can be planned.

Further, the construction method of the present invention uses the above-described reinforcing bar unit, so that even when a large diameter and a large amount of reinforcing bars are used, the labor for arranging the reinforcing bars can be greatly reduced, and the floor form laying operation can be performed. In addition, since the wall is constructed prior to the floor, the wall has a large wall thickness, such as a core wall type building, and the concrete strength of the wall is larger than the concrete strength of the floor. It is suitable to be adopted when constructing a building to be set.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a reinforcing bar unit according to an embodiment of the present invention.

FIG. 2 is a partially enlarged view of a support in the unit.

FIG. 3 is an enlarged side view of the support.

FIG. 4 is a diagram showing a state where the unit is grounded.

FIG. 5 is a view for explaining a construction procedure using the unit, and is a view showing a state in which construction of a wall on the Nth floor is completed.

FIG. 6 is a view showing a state where a reinforcing bar unit is built on the (N + 1) th floor.

FIG. 7 is a view showing a state in which a movable formwork is rearranged on the (N + 1) th floor.

FIG. 8 is a view showing a state where a deck plate on the (N + 1) th floor is laid.

FIG. 9 is a view showing a state where wall concrete on the (N + 1) th floor is cast.

FIG. 10 is a view showing a state in which floor concrete is cast.

[Explanation of symbols]

 W Wall S Floor P Deck plate (floor formwork) F Moving formwork (wall formwork) 1 Reinforcing bar unit 2 Vertical bar 3 Horizontal bar 4 Unit body 5 Supporting tool 6 Side plate 6a Supporting unit 7 Connecting plate 8 Ring 9 Slab stud ( Floor reinforcement) 10 Slit insertion hole 11 Fixing tool.

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) E04C 5/04 E04G 11/06 E04G 11/38 E04B 2/84

Claims (5)

(57) [Claims] 1. A wall rebar unit for use in constructing a reinforced concrete building, wherein a wall form is supported on a unit body formed by assembling vertical and horizontal rebars in a lattice shape. A support unit, which is a part of the rebar, is attached to a position of a joint with the floor. 2. The rebar unit according to claim 1, wherein the support also serves as a jig for lifting the rebar unit. 3. The rebar unit according to claim 1, wherein a fixing tool embedded in the concrete and integrated with the concrete is attached to the support tool. 4. The reinforcing bar unit according to claim 1, wherein a part of a floor reinforcing bar is attached to the support. 5. When a reinforced concrete building is constructed using the reinforced unit according to claim 1, the reinforced concrete unit is erected at a wall forming position and wall concrete is poured into the reinforced concrete building. After the floor is formed in advance, the floor form is supported on the support in the reinforcing bar unit, and the floor form is laid, and after the floor reinforcement, the floor concrete is cast to form the floor. Construction method of reinforced concrete building.