JPH0452276Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention relates to a woven fence used for stabilizing and protecting slopes in civil engineering work and for revetment of waterways.

[Conventional technology]

In the past, fern fences were used for slope protection works and bank protection works, but in recent years, as the number of slope construction works has increased due to the development of residential roads, etc., various materials have been used. It has become like that.

Among these, nets made of synthetic resin have become particularly popular recently, and are light and
It has the advantage of being able to roll up long items, being convenient to transport, and having a moderate amount of flexibility, so that it easily adapts to soil and sand, making it easier to stabilize slopes.

[The problem that the idea aims to solve]

However, although the above-mentioned synthetic resin nets have moderate strength, after several years of use, they will bend significantly between the piles due to the pressure of earth and sand containing a large amount of water due to heavy rain etc. In addition, cracks develop in these areas, and as they progress, slopes and waterway revetments collapse, creating a need for safer materials for woven fences. There is.

[Means to solve the problem]

In order to solve the above-mentioned problem, the present invention provides a large number of elongated perforated plates made of synthetic resin around which metal wire bodies are spirally wound. A net-like body in which the bent portion and the bent portion of the adjacent perforated plate are engaged with each other is stretched between the piles.

[Effect]

The present invention involves arranging a large number of elongated perforated plates made of synthetic resin in which metal wire bodies are spirally wound, and having holes adjacent to bent portions of the wire bodies located at both ends of the perforated plates. Since a net-like body in which the bent portions of the plate are mutually engaged is provided between the piles, the overall earth pressure is controlled by the net-like body formed by the metal wires. Accept it. Generally, the tensile strength of the metal wires that make up the net is much higher than that of synthetic resin, so they have sufficient strength to withstand large earth pressures. In addition, when we look at the partial portion of the overall earth pressure, it is felt by the synthetic resin perforated plate within the small quadrilateral surrounded by the wire bodies, but it is a small area. Therefore, the pressure caused by the earth and sand is small, and since it is a perforated plate, rainwater contained in the earth and sand can be discharged through the holes. Further, since the perforated plate is in the shape of an elongated and rigid short fence, and the net-like bodies are mutually engaged, even long objects can be wound.

〔Example〕

Hereinafter, the knitted fence of the present invention will be described in detail with reference to examples.

FIG. 1 is a partial front view of an embodiment of the present invention, in which 1 is a net-like body, 2 is a perforated plate, and 3 is a metal wire body constituting the net-like body. The mesh body 1 without the perforated plate 2 is a so-called diamond-shaped wire mesh, and the wire body 3
has a zigzag shape.

FIG. 2 is a partial enlarged view of a part of the net-like body 1, in which the wire bodies 3 differ depending on the hardness of the wire bodies. However, if a soft wire is used, the wire will be approximately straight, but if a hard wire is used, the bent portion 5 will be curved with a large radius of curvature, resulting in what is called a wire mesh with a large mesh thickness. The wire body 3 is not particularly limited as long as it is a metal wire with tensile strength, but iron wire is generally the most desirable, and the wire diameter is 2.0~
4.0m/m is suitable. Figure 3 shows wire body 3
13 is an iron core material, 14 is a rust-proofing layer plated with zinc, etc., and 15 is a coating layer coated with a synthetic resin such as polyethylene or polyvinyl chloride. , coating thickness is 0.2~
Approximately 0.8m/m is good, and when used on slopes etc.
It is desirable to color the fence in green or black so that it does not look out of place.

On the other hand, the perforated plate 2 is preferably a rigid plate made of high-density polyethylene or polyvinyl chloride with many small holes, or one made integrally into a net shape by extrusion molding. It is desirable that the wire be colored in a color that harmonizes with the color of the wire body 3.

FIGS. 4 and 5 are front views showing an example of a perforated plate 2, in which holes of 5 mm to 20 mm are present in a flat plate. For example, Tricarnet product number N manufactured by Takiron Co., Ltd. -23, N-24 etc. are preferable. This product is made of high-density polyethylene and has a thickness of about 2 mm, is rigid, lightweight, and easy to cut. The perforated plate 2 is not particularly limited as long as it is rigid and allows water contained in earth and sand to pass through, but it has good weather resistance and is easy to cut. The perforated plate 2 is not particularly limited as long as it is rigid and allows water contained in the earth and sand to pass through.
Extruded black high-density polyethylene nets are the best because they have good weather resistance, workability, and cost efficiency.Other options include flat polyvinyl chloride plates with holes drilled in them. Available for use.

Further, the thickness of the perforated plate 2 is closely related to the net thickness of the wire body 3. That is, the knitted fence of the present invention is made by manufacturing a regular diamond-shaped wire mesh, and the perforated plate 2 is inserted into the thick part of the mesh, so if the mesh is extremely thin, the perforated plate is set. It can be said that it is difficult.

Next, to briefly describe the method for manufacturing the knitted fence of the present invention, first, a large number of perforated plates 2 are cut into predetermined widths. For example, the tricarnet (N-24) with a thickness of 2.0 m/m is processed into a length of 1 m and a width of 5 cm. Further, as the wire body 3, synthetic resin-coated iron wire is woven into a rhomboid shape, straight wire rods are provided at both ends in the width direction (both upper and lower ends in FIG. 1), and the ends of the wire body 3 are fully knuckled and fixed. Then, the perforated plate 2 is attached to the rhomboid wire body 3.
are inserted one after another into the zigzag-shaped gaps, creating a rhombus mesh with perforated plates 6 to 20 meters long.
At this time, the relationship between the mesh size of the diamond mesh and the width of the perforated plate is extremely important. Referring to the mesh of the diamond-shaped mesh, that is, FIG. 2, the width of the perforated plate relative to the diagonal length L of the diamond-shaped mesh is 2(+d)<
It must be L, but if it is too small, a large gap will open between adjacent perforated plates and earth and sand will flow out from there, which is undesirable. However, d is the diameter of the wire. Furthermore, since the angle of the bent portion 5 varies depending on the hardness of the wire body 3 when knitting it, it is important to carefully determine the width of the perforated plate and the mesh size of the rhombic wire mesh. It is.

Once the net-like structure with the perforated boards set is completed, it is transported to the construction site and placed in the predetermined locations where the knitted fences will be erected, with lengths of 1.5 to 100 meters spaced approximately 2 meters apart.
A 2m pile was driven in and a net made of perforated plates was attached to it. FIG. 6 is a perspective view showing the state in which the knitted fence of the present invention is attached. Of course, bank protection works for waterways can also be installed in the same manner.

[Effect of idea]

As is clear from the above explanation, in the present invention, since the net is composed of metal wire bodies, the net does not easily crack or break even when the pressure of earth and sand is strong due to heavy rain etc. Never. In addition, since the synthetic resin perforated plate has a long and narrow fence shape, even if it is a net-like body with perforated plates set, it can be rolled up, making it convenient to carry. However, the perforated plates prevent soil from flowing out, and the pressure of the soil applied to each perforated plate is small, so even if it is made of synthetic resin,
It has the great effect of being able to be used safely for a long period of time without cracking or breaking like in the past.

[Brief explanation of the drawing]

Fig. 1 is a partial front view showing one embodiment of the knitted fence of the present invention, Fig. 2 is a partially enlarged view of a part of the mesh body 1, Fig. 3 is an enlarged sectional view of the wire body, and Fig. 4 5 is a partially enlarged view of the perforated plate, and FIG. 6 is a perspective view showing the state in which the knitted fence of the present invention is used. 1... Reticular body, 2... Perforated plate, 3... Wire body, 4
...Pile, 5...Bending part.

Claims (1)

[Scope of utility model registration request] A large number of elongated perforated synthetic resin plates on which metal wire bodies are spirally wound are arranged side by side, and the perforated plates adjacent to the bent portions of the wire bodies located at both ends of the perforated plates are arranged in parallel. A woven fence characterized in that a net-like body whose bent portions are mutually engaged is stretched between stakes.