JPH05486B2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention prevents the washing away of earth and sand on the slope and the washing away of the sprayed material in the initial stage of construction in slope protection work, and has less impact on the environment. Regarding vegetation netting.

(Conventional technologies and their problems) Various developments have been made in the conventional slope protection and vegetation construction work, but among them, vegetation nets and turf structures can be standardized as products for slope surfaces. The entire area can be covered to prevent soil and sand from flowing away and the sprayed material from being washed away.It is inexpensive and can be constructed in a short period of time. It has the following advantages and has been adopted in many slope protection works and vegetation works.

However, conventional vegetation nets have the following problems.

Vegetation nets that have been used in the past are made of various materials such as vegetable, chemical, and metal, but all of them are nets made of simple cross-section wires such as single wires or rope-like materials. However, only the sand or sprayed material entangled on the surface of the strands can be secured, and it cannot be said that the effect of preventing sand and sprayed material from flowing away from the slope is sufficient. In addition, even when installed on a slope, the net itself has no unevenness, so rainwater flowing down the slope will go over the net and flow down the slope, and as a result, the rainwater will not be dispersed but will collect in one place, Gallie rosion often occurred on the face.

Therefore, many researchers have attempted to improve the above-mentioned problems. For example, they have made many intermittently parallel cuts in chemical or metallic sheet materials such as paper, fibers, or plastics, and have made them at the construction site. A method has also been proposed in which a lever sheet is spread out in a net shape to prevent soil erosion.

However, in the case of paper or fibrous material, the strength is significantly reduced by making cuts, making it impossible to achieve sufficient effects. In addition, in the case of chemical or metallic materials, although they are strong enough, they cannot be expected to corrode and return to a part of the soil like plant-based nets, and in many cases, they cannot be expected to corrode and return to a part of the soil. As a result, there was a problem that the topsoil was washed away during the early stages of construction.

Therefore, in view of the balance between cost and effectiveness, vegetation nets used especially in forest conservation and the like are often made of plant material, which rots and becomes soil organic matter in about one to two years. As a typical example,
Generally, what is used is something called straw grass, which is made by weaving straw into a weft and warp to create a grass-like or coco-like material with seeds, fertilizer, or even thin cotton attached to it.

However, the straw grass mentioned above is still made of a single strand of straw, and it cannot be said that the effect of preventing soil and spraying materials from washing away is sufficient. There has been a long-awaited development of a vegetation net that has good initial adaptability to the soil, and is also effective in preventing the washing away of soil and sprayed materials during the early stages of construction.

As an alternative to conventional straw grass,
A twistable type as represented by No. 32069 (Utility Model Publication No. 59-137986) has been proposed. However, the twisted yarn is also a single wire like straw, and the effect of preventing the washing away of earth and sand and the washing away of the sprayed material cannot be said to be sufficient.

As a result of various studies regarding the above problems, the inventors of the present invention have determined that a wire with a width of 3 mm to 3 cm made of paper, nonwoven fabric, or chemical yarn can be made into a mesh smaller than the width of the wire using a large number of warp threads. By folding and knitting the vegetation net, the front and back sides of the vegetation net have peaks and valleys randomly, giving it a volume that prevents the washing away of earth and sand and the washing away of the sprayed material in the early stages of construction. The present invention was achieved based on the knowledge that it is possible to disperse runoff water and supply a vegetation net that erodes over time and is returned to the soil as organic matter.

(Means for Solving the Problems) That is, the present invention provides wefts of paper, nonwoven fabric, and chemical threads constituting the vegetation net with a width of 3 mm to 3 cm.
A net for vegetation is produced by folding the strands of strands into a mesh smaller than the width of the strands by a large number of warps, and the front and back sides have random peaks and troughs, and the net has a thin layer. This net for vegetation is characterized in that cotton is glued and seeds and fertilizer are stuck to the thin cotton.

The structure of the present invention will be explained in more detail by referring to examples.

First, to explain the materials that make up the net, the strands used as the weft are tape-shaped paper, nonwoven fabric, or polyethylene or polypropylene flat yarn (2000 to 3000 deniers), and the warp is made of the same material as the flat yarn described above. Filament (400-500 denier) is used.

Also, unlike conventional rayon, which can only be produced in the form of fibers, viscose rayon can be produced in the form of sheets or films, and since the humification period can be easily adjusted, it can also be used as warp and warp yarns. .

A tape-shaped paper that is supplied as a weft when weaving the warp and warp yarns by plain weaving or entangled weaving,
The tension acting on each of the warp and warp yarns is adjusted so that the strands of nonwoven fabric or flat yarn are folded in by the warp yarns to a width smaller than the width of the strands, as shown in FIG. 1.

As a result, the net woven by the above method is
Because the weft yarns have a width, they are woven with random peaks and troughs on the front and back sides, as shown in the longitudinal cross-sectional view of Figure 2.

In addition, randomness and volume may be improved by lightly twisting or handling the weft yarns when or before supplying the weft yarns.

In addition, by integrating the humus-resistant strands and the humus-resistant strands as weft threads, and knitting with the warp of the humus-resistant yarn, even after the humus-prone portion corrodes over time, the humus-resistant yarn remains intact. The formed net-like material remains on the soil surface and can maintain the soil-blocking effect for a long period of time.

In addition, instead of the paper, nonwoven fabric, and chemically-prone yarns that make up the weft, chemically-produced humic-resistant filaments are inserted in strips at appropriate intervals, and chemically-produced humic-resistant filaments are inserted at appropriate intervals. By weaving with warp threads, humus-resistant threads remain in a band after the humus-prone areas corrode, and washed-off topsoil accumulates in the band, becoming a base for vegetation and promoting the introduction of vegetation onto slopes. I can do it.

Furthermore, by adhering thin cotton to which seeds and fertilizers are attached to the vegetation net of the present invention, it is possible to more reliably introduce vegetation onto the slope.

(Effect of the invention) The present invention provides weft paper constituting a vegetation net,
Woven by folding 3 mm to 3 cm wide strands made of non-woven fabric or chemical yarn into a mesh smaller than the width of the strands using a large number of warp yarns, and having peaks and troughs randomly on the front and back sides. A net for vegetation is characterized by: A net for vegetation is characterized in that thin cotton is adhered to the net, and seeds and fertilizer are adhered to the thin cotton.The net for vegetation has the following effects.

In other words, by having peaks and valleys randomly on the front and back sides of the net, it is possible to prevent soil and sand from flowing away and the sprayed material from flowing away in the early stages of construction.
In addition, it was possible to disperse water runoff from the surface of the slope, supplying nets that eroded over time and returned to the soil as organic matter, thereby promoting the introduction of vegetation onto the slope.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing a state in which weft yarns are woven together by warp yarns. FIG. 2 is a sectional view of the vegetation net according to the present invention. FIG. 3 is a front view of the vegetation net according to the present invention. FIG. 4 is a perspective view showing a part of the method for manufacturing a turf body according to the present invention. In the figure, 1 is the weft, 2 is the warp, 3 is the net, 4 is the seed, 5 is the fertilizer, and 6 is the thin cotton.

Claims (1)

[Claims] 1. Weft paper, nonwoven fabric, and
A chemical yarn with a width of 3 mm to 3 cm is knitted and woven by folding it into a mesh smaller than the width of the wire using a large number of warp threads, and the front and back surfaces have random peaks and valleys. net for vegetation. 2. Claim No. 2, in which the weft is made of paper, nonwoven fabric, easily corroded strands of chemical yarn, and chemically corrosion resistant strands, and is knitted and woven with the warp of chemical corrosion resistant yarn. The vegetation net described in item 1. 3 In place of the easily corroded strands of paper, nonwoven fabric, and chemical yarns that make up the weft, chemically resistant corrosion resistant strands are inserted in strips at appropriate intervals, and the warp of the chemically resistant corrosion resistant yarns A vegetation net according to claim 1, which is knitted and woven with. 4. The vegetation net according to claim 1 or 3, wherein at least one of the weft and warp constituting the vegetation net is made of viscose rayon. 5 Claims 1st, 2nd, 3rd, or 4th
A net for vegetation, characterized in that thin cotton is adhered to the net for vegetation as described in 1. above, and seeds and fertilizer are adhered to the thin cotton.