JPS6232302B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in a reinforcing bar arrangement method for slab top end reinforcing bars.

In general, the part divided by the effective length LX in the short side direction and the effective length LY in the long side direction of the slab is defined as a block, and the middle side excluding approximately LX/4 from both sides of the length LY in the long side direction within the block. and the length LX in the short side direction
The part defined by approximately LX/4 from both sides is defined as end A, and approximately from both sides of length LX in the short side direction.
The part defined by approximately LX/4 from the middle side excluding LX/4 and both sides of the length LY in the long side direction is defined as the end part A', and is approximately LX/4 shorter than both sides of the length LY in the long side direction. Corners C are the four corner parts defined by approximately LX/4 from both sides of the length LX in the side direction, and the middle side and the short side where approximately LX/4 is removed from both sides of the length LY in the long side direction. The part defined by the middle side of both sides of the length LX excluding approximately LX/4 is defined as the center part B,
Reinforcing bars at the top of the slab are placed taking into consideration the load distribution in those areas.

In other words, as shown in Figure 1, in a block surrounded by beams 1, 2, 3, and 4 (1' in the figure indicates a column), dense reinforcing bars are placed at the ends A and A' where tensile stress is applied. Rough reinforcing bars are placed in the center B and corner C where no tensile stress is applied.

Let the beams parallel to the length LY in the long side direction be long side beams 1 and 2, and let the beams parallel to the length LX in the short side direction be beams 3 and 4 in the short side direction.

However, even in the case of conventional hand-assembled reinforcement or in the case of a reinforcing bar network formed by welding the intersection points of reinforcement, the situation of joints or fixings on beams is as shown in Figure 2 A, where the beam is aligned in the long side direction. The two main reinforcements 5' placed at the adjacent ends A across the beam abut against each other from both sides of the beam, and the reinforcements at the ends A and A' are particularly dense, so
This caused problems when pouring concrete into the beams,
In addition, the reinforcing bars spring up, resulting in poor concrete coverage on the beams and other construction problems.

Figure 2 (b) shows the situation on the beam of the sub-reinforcement 6' placed at the adjacent end A' across the beam 3 in the short side direction, and the situation is the same as on the beam in the long side direction. It is in.

Also, although there are no adjacent ends of the beams 1 and 4, the reinforcement arrangement on the beams protrudes from one side in the same manner as described above.

In the figure, 7' indicates a distribution reinforcement that is arranged along the beam in the long side direction, and 8' indicates a distribution reinforcement that is arranged along the beam in the short side direction.

As shown in Figure 3, in the conventional method of installing reinforcing bars at the top of the slab (using a reinforcing bar network), the beams 1,
2, is longer than a certain level, etc., the main reinforcement 5, which is a single piece, is arranged between the adjacent ends A across the beam 2 in the long side direction, and the adjacent end parallel to the beam 2. The reinforcing bars 7' arranged along the beam 2 and spanning the beams 3 and 4 in the short side direction form an H shape at the part A and the corner C, and the reinforcing bars are welded at the intersection points. The net 9 is arranged on the beam, but the distribution bars 7' are abnormally long, and the reinforcing bar net 9 is inevitably long, making it difficult to handle in terms of shape and weight, and it is difficult to carry. The reinforcing bar net 9 also bends, requiring a lot of manpower.

Also, in order to manufacture the reinforcing bar net, the reinforcing bar diameter is D1.
In the case of 0.13, commercially available materials with standard lengths up to about 7.5 m are insufficient, and custom-made materials are required, resulting in high costs and long delivery times.

In the figure, the reinforcing bar net 9' is approximately a half-section of the reinforcing bar net 9, and the reinforcing bar net 10' is of the same specifications as the reinforcing bar net 9, which is disposed on the beam of the beam 3 in the short side direction.
The reinforcing bar network 10' is approximately a half section of the reinforcing bar network 10.

The present invention was made in view of the above circumstances,
The gist of this is that the sub-reinforcements between the ends A' are adjacent across the beams in the short side direction, the corner reinforcements between the corners C, and the beams in the long side direction are adjacent to each other. End A
As shown in Figure 2 A and B, the main reinforcement between the beams is structured so that it runs as a single piece without joints or fixings on the beam,
The distribution bars of the reinforcing bar network placed on the beams in the long side direction are placed using joints so as not to be long and span the reinforcing bar nets placed on the beams in the short side direction to prevent cracks in the center part B. When evenly distributed reinforcement is required, the reinforcement is placed as a rebar network, and joint processing is performed at approximately LX/4 in the center, so that a single rebar can be used on the beam where the tensile stress is maximum. It penetrates through the concrete, completely fulfilling the purpose assigned to the reinforcing bars, and also eliminates troubles during concrete pouring by eliminating congestion and disorder of reinforcing bars on the beams. This makes it easier to handle reinforcing bar nets, which can be handled at low cost and during construction.

The details of the present invention will be explained below based on the drawings of the embodiments.

In other words, Fig. 4A shows the sub-reinforcements 6, which are made of one piece, arranged between the adjacent ends A' across the beam 3 in the short side direction, and the corners, which are made of one piece, which are arranged in the corners. The reinforcement 6'' is extended parallel to the beam in the short side direction to the adjacent end A' and the corner C, along the beam 3 in the short side direction and to the beams 1 and 2 in the long side direction. The reinforcing bar net 11 is welded at the intersections with the distribution bars 8 arranged as shown in FIG.
Placed on the beam 3 in the short side direction, and placed on the beam 4 in the short side direction.
This figure shows a mode in which a reinforcing bar net 11', which is approximately a half cross section of the reinforcing bar net 11, is disposed on top of the reinforcing bar net 11.

Figure 4 (b) shows main reinforcements 5 that are made of a single piece and are arranged between the adjacent ends A across the beam 2 in the long side direction.
and a beam 3 in the short side direction along the long side beam 2 at the end A adjacent to the beam 2 in the long side direction,
The reinforcing bar net 13 is welded to the reinforcing bar net 11, 11' arranged on the beams 4, at the intersection with the distribution bars 7 which are arranged in a bridging manner and provided with the joints 12.
A reinforcing bar net 13', which is approximately a half cross-section of the reinforcing bar net 13, is placed on the beam of beam 1 in the long side direction, and reinforcing bars for the upper end of the slab are installed. This shows that.

Adjacent ends A, A', corner C,
A reinforcing bar network 1 installed on the beam of the beam 1, which does not have
3', and the reinforcing bar network 1 arranged on the beam of the beam 4.
It goes without saying that 1' may be a substantially half cross-section of the reinforcing bar net 13 and the reinforcing bar net 11, excluding unnecessary parts.

FIG. 4C shows a reinforcing bar network 16 formed by welding the intersections of reinforcing bars 14 and 15, which are arranged as necessary to prevent cracks, in the central part B, which is left blank due to the arrangement of reinforcing bars at the upper end of the slab.

FIG. 4D shows a mode of reinforcing bars at the upper end of the slab with a reinforcing bar network 16 installed, and the reinforcing bar network 16 is connected to the joint 12'.
It is connected to reinforcing bar networks 11, 11' and 13, 13'.

The cross marks in Figures 3 and 4 B and D indicate that the joints are fixed by bundling, etc., but since the joints are in areas where no tensile stress is applied, the reinforcing bar mesh A simple binding that does not shift the arrangement is sufficient.

With this configuration, the present invention eliminates the congestion of reinforcing bars and facilitates the pouring of concrete into the beams because the reinforcing bar network that is passed over the beams in one piece does not have any joints or fixations on the beams. This can be done without any problems, and there is no risk of poor cover on the beam due to the reinforcing bars springing up. Also, by connecting the distribution bars of the reinforcing bar network placed on the beam in the long side direction to the reinforcing bar network placed on the beam in the short side direction, the distribution bars can be placed on the beam in the long side direction. The reinforcing bar network is not long, maintains appropriate shape and weight, and is an excellent slab top reinforcement that can be easily installed by amateurs without difficulty in work, high costs, or delays in delivery. This is the reinforcing bar installation method.

[Brief explanation of the drawing]

Figure 1 is a load distribution diagram of slab top reinforcement, Figure 2 is an explanatory diagram showing the conventional reinforcement arrangement relationship on a beam, Figure 3 is a diagram of the conventional arrangement of slab top reinforcement using a reinforcing bar network, Figures 4A to 4D are procedural diagrams of the method of the present invention. A simple explanation of the symbols, 1, 2...Beams in the long side direction,
3, 4... Beam in the short side direction, A, A'... End, B... Center, C... Corner, 1'... Column, 5, 5'... Main reinforcement, 6,
6'... Sub-reinforcement, 6''... Corner reinforcement, 7, 7'... Distribution reinforcement along the beam in the long side direction, 8, 8'... Distribution reinforcement along the beam in the short side direction, 9, 9'... Conventional Reinforcing bar net arranged on the beam in the long side direction, 10, 10'... conventional reinforcing bar net arranged on the beam in the short side direction, 13, 13'... placed on the beam in the long side direction according to the present invention. Reinforcement net to be installed, 11, 11'
...Reinforcement bar network arranged on the beam in the short side direction according to the present invention, 12, 12'...Joint, 14, 15...Reinforcement bar arranged in the center part, 16...Reinforcement bar network arranged in the center part.

Claims (1)

[Claims] 1 When installing slab top reinforcement on a block surrounded by beams in the short side direction and beams in the long side direction, the ends A, A', the center part B,
In order to arrange the necessary reinforcement suitable for corner C, we used sub-reinforcements made of a single piece arranged between the adjacent ends across the beam in the short side direction, and a single piece made of sub-reinforcement placed between the corners. An arrangement in which the corner reinforcements are arranged parallel to and adjacent to the beam in the short side direction at the end and the corner, along the beam in the short side direction, and so as to span the beam in the long side direction. A reinforcing bar network with welded intersections with force reinforcement bars is placed on the beam in the short side direction, and the main bars, which are made of a single piece and passed between the adjacent ends with the long side beam in between, are connected to the long side beams. An arrangement in which joints are provided and arranged at the ends parallel to and adjacent to the beams in the side direction, so as to bridge the reinforcing bar network placed along the beams in the long side direction and on the beams in the short side direction. A reinforcing bar network installation method for slab top end reinforcement, which is characterized by placing a reinforcing bar network with welded intersections with force reinforcement bars on the beams in the long side direction.