JPS6039835B2 - Reinforced steel construction method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a reinforcing bar pre-assembly method in which reinforcing bars for columns and beams are assembled on the ground, and beam bars are suspended over the previously erected column bars and then connected.

This construction method is said to have better construction accuracy because the column reinforcements and beam reinforcements are assembled into the ground than the anchor construction method, in which the columns and beams are roughened within the formwork, but the construction accuracy of the column reinforcements and beam reinforcements is There was a problem with the construction of the hoop at the mouth.

Especially at the end of a beam where the upper and lower reinforcements are bent downward, it is not possible to insert a hoop in the joint part of the column reinforcement, so the beam reinforcement is set on the beam support member in the narrow formwork. Later on, the hooves are being installed, which sometimes makes the work difficult. This invention eliminates the above-mentioned drawbacks of the reinforcing bar pre-assembly method, and makes it possible to easily attach the hoop to the joint part without being affected by the fact that the end of the beam bar is bent downward for the purpose of anchoring. Moreover, the spacing between the hooves is made the same, further improving the construction accuracy of the joint part.

This invention for the above-mentioned purpose has a plurality of hoops applied to the joint part of the column reinforcement before dropping and setting the anchor part of the beam reinforcement on the beam reinforcement member material of the column reinforcement. It is characterized in that the hoops are arranged at predetermined intervals around the columnar reinforcements between the beam reinforcements and after the beam reinforcements are set.

The above hoop formation is such that the anchor part of the lower reinforcement fits within the upper end of the columnar reinforcement, the upper reinforcement is above the columnar reinforcement, and a bundle of hoops is inserted from the side under the upper reinforcement at the upper end of the columnar reinforcement. You can either do this artificially when there is a gap between them, or you can bundle multiple hoops and attach them to the ends of the upper reinforcements, drop them together with the upper reinforcements, and place them around the column reinforcements. In any case, if the hoops are connected at regular intervals using wire or the like, it will be extremely easy to install them at the joint after setting the beams. The present invention will be described in detail with reference to the illustrated embodiments.

In the figure, reference numeral 1 indicates a column reinforcement, and a hoop 12 is attached to the corner main reinforcement 11 by winding it spirally up to the beam support material 13.

Reference numeral 2 is a beam reinforcement, and both ends of the upper reinforcement 21 and the ends of the lap reinforcement 22a, which are joined to both ends of the lower reinforcement 22 by lap joints, are bent downward to form anchors 23 and 24. Stirrups 25 are provided on the entire area except for the drop-in area.

Reference numeral 3 denotes hoops for the joint part, a predetermined number of which are connected by wires 31 so as to be expandable at designed intervals, and bound together using other wires 32. , 3 east of the hoop at the location of Figure 1a as described above.
is inserted from the side and then attached to the end of the upper reinforcement 21 of the beam reinforcement 2.

As shown in Fig. 1 b', the column reinforcement 1 is lowered by a crane or the like, and the column formwork 4, beam formwork 5, and floor formwork 6 are roughly erected, and then the beam reinforcement 2 is lifted up by the crane. , second
As shown in the figure, the lap line 22a is lowered until it touches the beam receiving member 13.

As a result, the bundle of hoops 3 attached to the ends of the upper reinforcements is embedded around the columnar reinforcements 1 at the joint portion. Next, untie the wire 32,
When each hoop 3 is pushed in with a rod or the like, the wire 31 causes the hoop 3 to unfold at predetermined intervals.

As a result, hoops 3, 3 are also applied to the joint portion, ensuring accuracy (Fig. 3). Note that the hoop 3 can be attached to the beam bar 2 in the same way even if it is placed on the lower bar 22 as shown by the chain line in FIG. It will look like the figure. 4 to 6 show the case where the beam reinforcement 20a in the long side direction and the beam reinforcement 20b in the short side direction are overlapped and connected by one column reinforcement, and in this case, the beam reinforcement 20a in the long side direction is Hoops 3, 3 are tied together using wires 31, 32 on the upper reinforcement 26 of the joint part as in the above embodiment, and the beam reinforcement 20a is dropped to place the lower reinforcement 27 on the beam support material 13. After setting the wire 32 as shown in Fig.
Unravel the hoops 3, 3, and arrange them at equal intervals at the joints of the column reinforcements 10.

Next, as shown in FIG. 6, the joint portion of the beam reinforcement 20b is dropped onto the top of the column reinforcement 10 from above the beam reinforcement 20a. The joint part of the lower reinforcement 28 of the beam reinforcement 20b is interrupted so as not to become an obstacle to the lowering, and the joint reinforcement 28 at that part is interrupted.
9a and the stirrup 25 are previously attached and retracted onto the beam 20b, and after setting the upper reinforcement 29 to the upper reinforcement 26, the interrupted portion is closed by attaching the joint reinforcement 28a and the stirrup 25. As a result, the beam reinforcements 20a and 20b in both the long and short directions are alternately connected to the joint part of the column reinforcement 10, and the hoops 3, 3 are arranged at the same interval around the column reinforcement at the joint part. . As mentioned above, this invention arranges the hoops of the joint part on the pillar reinforcements when lowering the beam reinforcements, and sets the hoops at predetermined intervals between the upper and lower beams of the beam reinforcements. This not only simplifies the work on the joints and improves accuracy, but also shortens the construction period by pre-assembling the reinforcing bars.

[Brief explanation of drawings]

The drawings show an embodiment of the reinforcing bar pre-assembly method according to the present invention. Figure 1 is a schematic diagram explaining the relationship between column reinforcement and beam reinforcement, and Figure 2 shows beam reinforcement at the joint part of column reinforcement. A partial diagram when dropping the
Figure 3 is a partial view when the hoop is installed, Figure 4 is a partial view when the beam reinforcement in the long side direction is inserted into the joint part of the column reinforcement,
FIG. 5 is a partial view when the hoop is arranged, and FIG. 6 is a partial view when the beam reinforcement in the short side direction is overlapped with the beam reinforcement in the long side direction and set at the joint part of the column reinforcement. 1... Column reinforcement, 2... Beam reinforcement, 3...
... Hoop, 13... Beam receiving member, 21...
...Upper muscle, 22...Lower muscle, 23,24...
... Anchor, 20a ... Beam bar on the long side in all directions,
20b... Beam reinforcement in the short side direction, 25... Stirrup, 26, 29... Upper reinforcement, 27, 2
8...... Bottom line, 31, 32... Wire. 1st. Figure 2 Figure 3 Figure 4 Figure 5 Figure 6

Claims (1)

[Claims] 1. A hoop of the number of clothes to be applied to the joint part of the column reinforcement when the column reinforcement and the beam reinforcement are assembled into the ground, the column reinforcement is erected, and then the beam reinforcement is lifted and constructed over the column reinforcement. is fitted around the column reinforcement between the upper and lower reinforcements of the beam reinforcement when lowering the beam reinforcement, and after the beam reinforcement is set, the hoops are arranged at predetermined intervals at the joint part. Rebar pre-assembled construction method. 2. The reinforcing bar pre-assembly method according to claim 1, wherein the plurality of hoops are bundled and attached in advance to the upper reinforcement of the drop-in portion of the beam reinforcement.