JPS624585Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an improvement of a porous metal formwork plate that is stretched as a back formwork on the outer surface of back-filling chestnut stone in retaining wall construction, lining, etc.

Conventionally, construction of retaining walls and lining of slopes in rivers, ports, roads, etc. has been carried out on the cutting surface 1 as shown in Figure 1.
A wire mesh 3 is stretched over the outer surface of the back-kuri-ishi 2 constructed in 2000, and concrete is poured directly onto the front surface of the back formwork. A construction method is generally adopted in which concrete 5 is placed between the split stones 4.

However, the wire mesh 3 used in the above method
is simply a planar weave of many iron wires or steel wires, and each iron wire or steel wire is not interconnected metallographically, so the bending rigidity is low both partially and as a whole. It was weak and could not stably hold the outer surface of the chestnut stone 2 in a flat plane, resulting in poor construction accuracy. In addition, the wire mesh 3 had the disadvantage that the workability was extremely poor because it was rolled out in a thick roll at the site.

Therefore, the inventor of the present invention recently devised a construction method using expanded metal plates, which can be manufactured at low cost and have relatively high bending rigidity both locally and as a whole, in place of the above-mentioned wire mesh, which has many drawbacks. but,
Due to the limited manufacturing dimensions of expanded metal plates, in order to use this as the back formwork, construction must proceed while connecting many of the expanded metal plates. For example, a root stone is placed on the poured foundation concrete 6 shown in FIG. After backfilling the chestnut stone 2 between the metal mold plate and the porous metal form board,
The masonry retaining wall is successively built upwards by repeating the work of pouring concrete 5 in between, but in order to raise the height of the perforated metal formwork plates in sequence, it is necessary to place the lower perforated metal formwork plates and The abutting edges of the upper perforated metal formwork plates must be tied at predetermined intervals in the longitudinal direction and connected each time with wire, etc., and the raising work is extremely troublesome and requires a lot of man-hours. The disadvantage is that the construction efficiency is not very good.

The present invention was developed in order to solve the above-mentioned drawbacks.The structure of the reinforcing edge material that reinforces the edges of a rectangular expanded metal plate formed to the required size was devised to create a porous metal mold. It is an object of the present invention to provide a perforated metal form board which is characterized by the structure of the frame board, and which allows for extremely simple and efficient raising work.

Hereinafter, the present invention will be specifically explained based on embodiments shown in the drawings.

FIG. 2 is a perspective view of a perforated metal form plate according to an embodiment of the present invention. In the figure, 7 is a steel expanded metal plate, and the required size is, for example, 1m x
It is manufactured in a rectangular shape of about 30 to 33 cm or 1 m x 60 to 66 cm. Reference numeral 8 denotes reinforcing edge members having a predetermined width attached to the upper and lower edges of the expanded metal plate 7, respectively, and having a U-shaped cross section, the edge of the expanded metal plate 7 is attached to the base opening thereof. They are fitted and fixed by crimping or spot welding.

U-shaped slit grooves 9 are provided on both side walls of the reinforcing edge material 8 at predetermined intervals in the longitudinal direction, and the portion separated by the slit grooves 9 extends in a direction perpendicular to the longitudinal direction. Cut out the locking piece 1
0 is formed.

FIGS. 3A and 3B are partial sectional views showing a connection procedure when raising the height using the porous metal form plate shown in FIG. 2. In FIG. 3A, the locking pieces 10a on both side walls of the reinforcing edge material 8 provided at the lower edge of the upper expanded metal plate 7 are cut downward so that the cross section is approximately U-shaped. Then, lower expanded metal plate 7
The edge of the reinforcing edge material 8 provided on the upper edge is fitted, and FIG. 3B shows the locking piece 10a.
The upper locking piece 10b corresponding to the upper locking piece 10b is cut and raised so that its cross section has a substantially figure-eight shape, and the lower locking piece 10b corresponding to this is cut and raised so that its cross-section is approximately a figure-eight shape. However, the lower locking piece 10b is fitted into the opening of the upper locking piece 10b.

Next, FIG. 4 shows another embodiment of the present invention, in which 7' is an expanded metal plate similar to 7 shown in the second line.
A reinforcing edge material 8' having a predetermined width is integrally formed with the expanded metal plate 7' at the upper and lower edges, and a longitudinal Vertical slit grooves 9' are provided at predetermined intervals in the direction, and the slit grooves 9', 9'
A part of the side wall surface separated by is cut and raised in a direction perpendicular to the longitudinal direction to form a locking piece 10'.

FIG. 5 shows how the perforated metal formwork plates are connected to each other in this embodiment. In FIG. The lower reinforcing rim material 8' is fitted and connected into the V-shaped opening formed by the reinforcing rim material 8' and the locking piece 10'. The upper and lower locking pieces 10' are cut and raised in opposite directions, and the reinforcing edge member 8' of the other side is fitted into the V-shaped opening formed to connect them.

In the embodiments shown in FIGS. 2 and 4, reinforcing edge materials 8, 8' are provided only at the upper and lower edges of the expanded metal plates 7, 7'; Reinforcing edge materials 8, 8' are also provided on both side edges of the plates 7, 7', as shown in Fig. 3 or 5.
The porous metal formwork plates may also be successively connected in the lateral direction using the connection method shown in the figure.

Also, the shape of the locking pieces 10, 10' cut up from the side wall surfaces of the reinforcing edge members 8, 8' and the locking pieces 1 thereof
The cross-sectional shape of the slit grooves 9, 9' is not limited to the shape of the illustrated embodiment, and can be shaped as the slit grooves 9, 9' depending on the size of the expanded metal plates 7, 7' and the connection method. The shape of the cut, the cut-and-raised cross-sectional shape of the locking pieces 10, 10', the position and number of the locking pieces 10, 10', etc. may be arbitrarily selected and designed.

As specifically explained above, the present invention provides a reinforcing edging material having a predetermined width on the edge of a rectangular expanded metal plate formed to a required size, and also provides a side wall of the reinforcing edging material. Slit grooves are provided at predetermined intervals in the longitudinal direction of the housing, and a part of the side wall surface separated by the slit grooves is cut up in a direction perpendicular to the longitudinal direction to form a locking piece. If a reinforcing edging material is provided on the upper and lower edges of the expanded metal plate, the perforated metal formwork plates are connected to each other via a locking piece made by cutting and raising a part of the side wall surface of the reinforcing edging material. The porous metal formwork plates can be successively raised while being connected to each other, and the connected porous metal formwork plates are stably held by the locking pieces.
There is no need to connect them by tying them together with wires as in the past, and there is an advantage that the raising work is extremely simple and construction efficiency is greatly improved. Further, if reinforcing edge members having locking pieces are provided on both side edges of the expanded metal plate, the porous metal formwork plates can be successively connected laterally as well, which is very convenient.

Since the locking piece can be formed by simply cutting and raising a part of the side wall surface separated by the slit groove provided in the side wall of the reinforcing edge material, it has many advantages such as easy production and suitable for mass production. Accordingly, it is possible to provide a porous metal formwork board that is extremely convenient and inexpensive in practice as a back formwork used in retaining wall construction, lining, etc.

[Brief explanation of the drawing]

Figure 1 is a side sectional view showing a conventional masonry retaining wall, Figure 2
The figure is a perspective view of a porous metal formwork plate showing one embodiment of the present invention, and Figures 3A and 3B are partial sectional views showing the connection procedure when raising the height using the porous metal formwork plate shown in Fig. 2. , Fig. 4 is a perspective view of a porous metal form plate showing another embodiment of the present invention, and Figs. FIG. 1... Cut surface, 2... Chestnut stone, 3... Wire mesh, 4...
... Split stone, 5... Concrete, 6... Foundation concrete, 7, 7'... Expanded metal plate, 8, 8'... Reinforcing edge material, 9, 9'... Slit groove, 10, 10a, 10b, 10'...Locking piece.

Claims (1)

[Scope of utility model registration request] A reinforcing edging material having a predetermined width is provided at the edge of a rectangular expanded metal plate formed to a required size, and slit grooves are provided at predetermined intervals in the longitudinal direction of the side wall of the reinforcing edging material. What is claimed is: 1. A porous metal form board, characterized in that a part of the side wall surface separated by the slit groove is cut and raised in a direction perpendicular to the longitudinal direction to form a locking piece.