JPH1144046A - Method for assemlbing reinforcement and concrete structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a reinforcement-assembling method capable of displaying required function of shear reinforcing bars and concrete structure with high work efficiency at a low construction cost. SOLUTION: After a lower side main reinforcing bar and lower side main reinforcing bars 3 are arranged, lower side hooks of shear reinforcing bars 5 of normal reinforcing bars providing semi-circular hooks to both ends are interlocked with the lower side main reinforcing bars 3. Upper side bars 9 on an upper side main reinforcing bar are arranged so that they are interlocked with upper side hooks of the shear reinforcing bars 5, and the shear reinforcing bars 5 and the upper side bars 9 on the upper side main reinforcing bar are fixed with anchorage devices. A lower side bar 7 on the upper side reinforcing bar is temporary set.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plate-shaped (slab) concrete structure and a method of assembling a reinforcing bar therefor.

[0002]

2. Description of the Related Art Generally, when a plate-shaped (slab) reinforced concrete structure is constructed, main reinforcing bars are arranged in a plane on the upper and lower sides of the slab, and shear reinforcing bars are arranged between the upper and lower main reinforcing bars. I do. 11 and 12 show a plate-shaped reinforced concrete structure, in which a main reinforcing bar 10 is provided above the structure.
3 and 105 are arranged so as to intersect, and the main reinforcing bars 103 and 105 are arranged so as to intersect under the structure.

[0003] A shear reinforcing bar 107 is arranged between the upper main bar 105 and the lower main bar 105. FIG.
As shown in FIG. 3, the shear reinforcing reinforcing bar 107 is a reinforcing bar provided with semicircular hooks at both ends.

[0004] As shown in FIG. 14, the screw rebars 107 a and 107 b are fixed between the upper main rebar 105 and the lower main rebar 105 using a coupler 109 between the screw rebars 107 a and 107 b. Alternatively, as shown in FIG. 16, without using a coupler, a method of arranging ordinary reinforcing bars 121, bending the ends thereof by a special bending machine, and fixing between the lower main reinforcing bars 105 and the upper main reinforcing bars 105. is there.

[0005]

However, when the screw reinforcing bar 107 is used as the shear reinforcing bar, the screw reinforcing bar 10 is not used.
7 and the coupler 109 are expensive, and it is necessary for a worker to enter between the upper and lower main reinforcing bars to mount the coupler 109, and the upper and lower main reinforcing bars must be separated by 1.5 m or more.

[0006] Further, as shown in FIG.
When the end of 1 is bent using a bending machine, it can be bent only to a reinforcing bar having a diameter of 16 mm and cannot cope with a reinforcing bar having a diameter larger than that. Therefore, a large number of small-diameter reinforcing bars having a diameter of 16 mm or less are arranged. As a result, the bending operation takes time and costs. In addition, the shape of the semicircular hook, that is, the bending radius and the length of the straight portion cannot be set to the prescribed values, and the predetermined function may not be exhibited.

SUMMARY OF THE INVENTION The present invention has been made in view of such problems, and has as its object to assemble a reinforcing steel bar which has good workability and is inexpensive, and in which a shear reinforcing steel bar can exhibit a desired function. It is to provide a method and a concrete structure.

[0008]

According to a first aspect of the present invention, a step of arranging a lower main reinforcing bar, wherein a hook at a lower end of a shear reinforcing bar having hooks at both ends is connected to the lower side. A step of arranging the shear reinforcing bar so as to engage with the reinforcing bar, a step of fixing an upper bar of the upper main bar of the upper reinforcing bar of the shear reinforcing bar, and a step of fixing the upper main bar temporarily placed. Fixing the lower bar to the upper bar of the upper main bar.

According to a second aspect of the present invention, a lower reinforcing bar, an upper main reinforcing bar, and a hook on a lower end side of a shear reinforcing bar having hooks at both ends are engaged with the lower reinforcing bar, and an upper end side of the shear reinforcing bar. Is a concrete structure in which concrete is cast into a reinforcing bar structure in which the hooks and the upper main reinforcing bar are fixed by fixtures.

[0010]

Embodiments of the present invention will be described below in detail with reference to the drawings. As shown in FIG. 1, after the lower main reinforcing bar 1 and the lower main reinforcing bar 3 are arranged, the lower hook of the shear reinforcing bar 5 made of a normal reinforcing bar having semicircular hooks at both ends is connected to the lower main reinforcing bar. 3 is engaged. The semicircular hooks at both ends of the shear reinforcement 5 are processed at a factory or the like.

Then, the lower reinforcement 7 of the upper main reinforcement is temporarily placed on the lower main reinforcement, and the upper reinforcement 9 of the upper main reinforcement is arranged so as to engage with the upper hook of the shear reinforcement 5. The shear reinforcement bar 5 and the upper bar 9 of the upper main bar are fixed by the fixtures shown in FIGS. 2 to 4. Then, as shown in FIG. 5, the lower bar 7 of the upper main bar is pulled up and fixed to the upper bar 9 of the upper main bar. 2 to 4 are enlarged views of the fixture of the T portion in FIG. 1, FIG. 3 is a view in the direction of arrows AA in FIG. 2, and FIG. 4 is a view in the direction of arrows CC in FIG. FIG. 2 is a view taken in the direction of arrows BB in FIG.

As shown in FIG. 4, two W-shaped plates 11a and 11b provided with a semicircular portion 15 are overlapped to form a hole 16 in the semicircular portion 15. Pass 5. The diameter of the hole 16 is smaller than the diameter of the shear reinforcement 5. And bolt 13a and nut 13c,
W-shaped plate 11 with bolt 13b and nut 13d
a and 11b are tightened to form the shear reinforcing steel 51.
Fixed to At the same time, the upper reinforcement 9 of the upper main reinforcement and the shear reinforcement 5 are fixed.

Next, as shown in FIG. 6, the upper reinforcements 9a and 9b of the upper main reinforcement are arranged and fixed to the lower reinforcement 7 of the upper main reinforcement. Then, concrete is cast to obtain a plate-like concrete structure.

As described above, according to the present embodiment, since the ordinary reinforcing bar can be used as the shear reinforcing bar 5, the cost can be reduced as compared with the case where the screw reinforcing bar is used. Further, since the semi-circular hook of the shear reinforcing steel bar can be processed at a factory, it can be manufactured to a specified value, and is superior in quality as compared with the case where a bending machine is used. Also, there is no need to use a special machine such as a bending machine. Compared to using small-diameter shear reinforcing bars, large-diameter ordinary reinforcing bars can be used as shear reinforcing bars.
The number of shear reinforcing bars can be greatly reduced, and costs can be reduced.

Next, another embodiment of the fixture of the T section in FIG. 1 will be described. 7 and 8 are detailed views of the T section, and FIG.
8 is a view in the direction of the arrow D-D, and FIG. 7 is a view in the direction of the arrow E-E in FIG. U-shaped plate 23 and upper rebar 9 of upper main rebar
And the flat plate 21 is placed on the U-shaped plate 23, and the U-shaped plate 23 and the flat plate 21 are fastened by the bolts 25 and the nuts 27, whereby the shear reinforcing reinforcing bar 5 and the upper The muscle 9 is fixed.

FIGS. 9 and 10 show another embodiment of the fixture of the T portion. FIG. 10 is a view taken in the direction of arrows FF in FIG. 9, and FIG. It is an arrow view. Metal plate 3
1 has a circular portion 32 and plate-shaped portions 34a and 34b, opens between the plate-shaped portions 34a and 34b, inserts the upper reinforcing bar 9 of the upper main reinforcing bar into the circular portion 32, and uses bolts 33 and nuts 35. By fastening the plate portions 34a and 34b, the shear reinforcement 5 and the upper reinforcement 9 of the upper main reinforcement are fixed.

The fixing device for fixing the shear reinforcing bar 5 and the upper bar 9 of the upper main bar is not limited to the one described above.
A variety of possibilities are contemplated and are included in the present invention.

[0018]

As described in detail above, according to the present invention, the workability is good and the cost is low, and the shear-reinforcing reinforcing bar can exhibit desired functions.

[Brief description of the drawings]

FIG. 1 is an explanatory view of a method of assembling a reinforcing bar.

FIG. 2 is a front view of a fixture.

FIG. 3 is a side view of the fixing device.

FIG. 4 is a plan view of a fixture.

FIG. 5 is an explanatory view of a method of assembling a reinforcing bar.

FIG. 6 is an explanatory view of a method of assembling a reinforcing bar.

FIG. 7 is a front view of a fixture.

FIG. 8 is a side view of the fixing device shown in FIG. 7;

FIG. 9 is a front view of the fixture.

FIG. 10 is a side view of the fixing device shown in FIG. 9;

FIG. 11 is a schematic configuration diagram of a plate-like concrete structure.

FIG. 12 is a diagram showing an arrangement of reinforcing bars of a plate-like concrete structure.

FIG. 13 is a view showing an end portion of a screw reinforcing bar.

FIG. 14 is an explanatory diagram of a method of assembling a reinforcing bar.

FIG. 15 is an explanatory view of a method of assembling a reinforcing bar.

[Explanation of symbols]

 1, 3... Lower main reinforcing bar 5... Shear reinforcing bar 7... Lower upper reinforcing bar 9... Upper upper reinforcing bar 11a, 11b... ... Bolts 13c, 13d Nuts 21 Flat plates 23 U-shaped plates 31 Metal plates

Claims (6)

[Claims] A step of arranging a lower main reinforcing bar; and a step of arranging the shear reinforcing bar such that a hook on a lower end side of the shear reinforcing bar having hooks at both ends is engaged with the lower reinforcing bar. Fixing the hook on the upper end side of the shear reinforcing bar and the upper bar of the upper main bar, and fixing the lower bar of the temporarily placed upper main bar to the upper bar of the upper main bar. A method for assembling a reinforcing bar, comprising: 2. The method of assembling a reinforcing bar according to claim 1, wherein a fixing tool for fixing the upper reinforcing bar of the upper reinforcing bar and the shear reinforcing bar is used. 3. The method of assembling a reinforcing bar according to claim 2, wherein the fixing tool is formed by fixing two W-shaped plates sandwiching the shear reinforcing bar with bolts. 4. The method for assembling a reinforcing bar according to claim 2, wherein the fixing device is a U-shaped plate through which the upper streaks pass and a flat plate fixed with bolts. 5. The method for assembling a reinforcing bar according to claim 2, wherein the fixing tool is a metal plate having a hole through which the upper streaks pass, and which is fixed with bolts. 6. A lower reinforcing bar, an upper main reinforcing bar, and a hook on a lower end side of a shear reinforcing bar having hooks at both ends are engaged with the lower reinforcing bar. A concrete structure in which concrete is cast into a reinforcing bar structure in which the main reinforcing bars are fixed by fixtures.