JPH0248497Y2 - - Google Patents

Description

[Detailed explanation of the invention] This invention relates to deck slabs, which are often used to form the road surface of elevated bridges, etc., and in detail, reinforcing bar processing, bar arrangement, and form work are all integrated into a single unit in the factory. It concerns floor slabs.

As a method of forming deck slabs for elevated general roads, etc., reinforcing bar processing, bar arrangement, and
A construction method is widely adopted in which all formwork, etc. are produced as a unit in a factory, and only the assembly of the unitized panels and the pouring of concrete are required on site. This construction method saves on-site labor compared to conventional on-site construction methods, so it can significantly shorten the construction period, and it has various advantages, such as better finishing accuracy of the floor slab.

Conventionally, floor slabs used in such construction methods have been constructed by, for example, connecting main reinforcing bars and distribution reinforcing bars in a mesh shape to form vertical reinforcements, interposing channel members between these vertical reinforcements, and It is known that these are integrated onto a formwork via hanging bolts.

However, in floor slabs with this type of structure, the formwork is formed by welding multiple hanging bolts onto the top of the steel plate.
The tips of these hanging bolts were welded to the channel members by protruding from the latticework of the mesh-shaped bottom reinforcement, so unless the hanging bolts were welded in the correct position, the tips of the hanging bolts would hit the reinforcing bars and could not be welded.
In addition, there were other problems, such as the need to weld a large number of hanging bolts to integrate the reinforcing bars onto the formwork, which was cumbersome work.

On the other hand, as a construction problem, when connecting reinforcing bars between opposing distribution reinforcing bars, the reinforcing bars must be passed between the channel material and the main reinforcing bars. There are also problems such as the need to increase the height by interposing spacers between the force reinforcing bars and the channel material.

This invention was proposed to solve the above-mentioned problems, and the purpose is to provide a floor slab that is easy to manufacture, suitable for mass production, and can reduce costs, as well as improve durability. shall be.

Hereinafter, the present invention will be explained based on an embodiment shown in the attached FIGS. 1 to 4.

In the figure, reference numeral 1 denotes a floor slab according to the present invention, and this floor slab 1 has a plurality of chevron plates 2 buried in a formwork 3.
are mounted parallel to each other at intervals,
Further, an upper reinforcing wire mesh 4 and a lower reinforcing wire mesh 5 are attached above and below through these chevron plates 2, respectively.

The chevron plate 2 is made of, for example, a steel band plate as a second
As shown in the figure, it is formed by bending in a jagged manner into a continuous chevron shape, and a lower surface steel strip plate 6 extending parallel to the chevron plate 2 is attached to the convex portion 2a on the valley side of the chevron plate 2. It is being This chevron-shaped plate 2 is attached onto the burying formwork 3 via the lower surface steel strip plate 6.

This filling formwork 3 is thin (approximately 1.6 mm thick)
galvanized iron plates are used, but glass fiber reinforced concrete plates (G.R.C.
version).

The upper reinforcing bar wire mesh 4 is formed by joining the main reinforcing bars 7 and the distribution reinforcing bars 8 that intersect with the main reinforcing bars 7 into a mesh shape using a spot welding machine or the like, so that the main reinforcing bars 7 are parallel to the chevron plate 2. Distribution reinforcing bar 8 is connected to chevron plate 2
It is attached to the upper surface of the convex portion 2b on the mountain side by welding or the like.

On the other hand, the lower reinforcing wire mesh 5 also has the upper reinforcing wire mesh 4.
Similarly, the basic structure is formed by joining main reinforcing bars 9 and distribution reinforcing bars 10 that intersect with the main reinforcing bars 9 in a mesh shape. In addition, this lower reinforced wire mesh 5 is
As shown in FIG. 3, a main reinforcing bar 9 extending parallel to the chevron plate 2 is attached to the side surface of the chevron plate 2 by, for example, welding.
0 can be attached by welding with a spot welder or the like.

The main reinforcing bars 7 and 9 of the above-mentioned upper reinforcing bar wire mesh 4 and lower reinforcing bar wire mesh 5 are each attached to the chevron plate 2 one by one in the embodiment, but if necessary, adjacent chevrons may be A configuration may also be adopted in which a plurality of them are provided between the plates 2.

Moreover, FIG. 4 shows a state in which the opposing distribution reinforcing bars 8 and 10 of the floor slab 1 configured as described above are interconnected, and as in the conventional case, the distribution reinforcing bars 8 and 1
One reinforcing bar 11 is tied to one side of 0.

In addition, the code|symbol 12 in the figure shows the concrete poured on the fill-in formwork 3.

Next, an example of the assembly procedure of the floor slab 1 configured as described above will be described. First, in a factory or the like, the lower surface strip steel plate 6 is attached onto the thin-walled filling form 3 made of galvanized iron plate or the like. The chevron-shaped plates 2 are attached in parallel with each other at intervals through the lower surface steel strip plate 6. This chevron plate 2
is attached by a method such as welding the burial formwork 3 and the lower surface steel strip plate 6. Then, the main reinforcing bars 9 are attached to the side surfaces of the chevron plate 2 by welding, and the distribution reinforcing bars 1 are placed on top of the main reinforcing bars 9.
0 intersects with the main reinforcing bars 9 and is attached by welding to assemble the lower reinforcing bar wire mesh 5. Next, the upper reinforced wire mesh 4 is placed on the upper surface of the convex portion 2b on the mountain side of the chevron plate 2, and the intersecting distribution reinforcing bars 8 are bridged and attached by welding.

In addition, FIG. 5 shows another example of the present invention.
A main reinforcing bar 7 extending parallel to the chevron plate 2 is attached directly to the convex portion 2b on the mountain side of the chevron plate 2 by welding, and distribution reinforcing bars 8 are attached between the convex portions 2b on the mountain side of the chevron plate 2. Even with such a configuration, the same effects as those of the above-described embodiment can be achieved.

Therefore, when the floor slab has the above-described structure, there are various effects as described below.

First, the reinforcing bars in the direction of the chevron plate 2 of the upper reinforcing wire mesh 4, that is, the main reinforcing bars 7, are the top chord of the truss, the steel strip plate 6 for the lower surface is the bottom chord of the truss, and the chevron plate 2 is made by bending the steel band in a diagonal. This is a so-called truss beam structure using truss diagonal members, and the truss beam supports the weight of the concrete cast on the filling formwork 3 with the support points between the girders. Furthermore, after the concrete hardens, the upper reinforcing wire mesh and the lower reinforcing wire mesh create a floor slab equivalent to a normal reinforced concrete floor slab.

Secondly, since the steel strip plate 6 for the lower surface is attached below the chevron plate 2, when the chevron plate 2 is welded onto the burial formwork 3, the welding position is not limited, and the steel strip plate for the lower surface 6 can be easily welded at any position, and the number of welding locations can be increased freely. Therefore, when the number of welding points is increased, when concrete is poured onto the filling form 3, even if the filling form 3 is thin, the filling form 3 is prevented from bending due to the weight of the concrete. can.

Thirdly, since the bottom steel strip 6 and the burying formwork 3 are in uniform surface contact, when installing both, the burying formwork 3 can be installed without bending, and after concrete pouring, The accuracy of the finish is also improved.

Fourthly, since the lower surface steel strip 6 is attached directly onto the burial formwork 3, the lower surface steel strip 6 can reinforce the burial formwork 3, increasing the strength of the entire deck slab 1. .

Fifth, after concrete is poured using the strip steel plate 6 for the lower surface of the chevron plate 2, it is possible to eliminate partition walls like conventional channel materials within the slab, eliminating the cause of cracks and further improving durability. can be done.

[Brief explanation of the drawing]

Figures 1 to 4 show an embodiment of the present invention; Figure 1 is a perspective view, Figure 2 is a front view, Figure 3 is a side view, and Figure 4 is a connecting section of the floor slab. FIG. 5 is a front view showing another example of the present invention. 1... Floor slab, 2... Chevron board, 2a... Convex part on the valley side, 2b... Convex part on the mountain side, 3... Filling formwork, 4
...Top reinforcing wire mesh, 5...Lower reinforcing wire mesh, 6...
Bottom steel strip plate, 7... Main reinforcing bar, 8... Distribution reinforcing bar,
9...Main reinforcing bars, 10...Distribution reinforcing bars, 12...Concrete.

Claims (1)

[Scope of utility model registration request] A lower steel strip plate extending parallel to the chevron plate is connected to the convex part on the valley side of a chevron plate formed by bending a steel band plate in a diagonal manner, and a plurality of chevron plates to which the lower steel band plates are connected are buried. It is arranged in parallel on the formwork via a lower surface steel band plate, and an upper reinforcing bar wire mesh made of main reinforcing bars and distribution reinforcing bars joined in a mesh shape is attached to the convex part on the crest side of the angular plate, The floor slab is further characterized in that a lower reinforcing bar wire mesh formed by connecting main reinforcing bars and distribution reinforcing bars via the chevron plate is attached between the upper reinforcing bar wire mesh and the burial formwork.