JPH1060897A - Vegetation net and greening method using the net - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a net which prevents erosion of a slope surface by grasses growing in a coarse-mesh area of a net in an early period of construction and which allows a corrosive fiber portion corresponding to a non-vegetation area formed along contour lines after a definite time has elapsed or more specifically, i.e., a fine-meshed corrosive fiber area to be corroded to thereby expose the ground surface so that plants may grow. SOLUTION: In a vegetation net 1 which repeats coarse-mesh and fine-mesh area for a proper spacing in the vertical direction, a weft which constitutes the dense area 3 is formed with a corrosive fiber of fine denier and moreover, the dense area 3 is so densely knitted that no plant may penetrate thereinto. A weft, which constitutes a sparse area is formed with corrosive fibers of thick denier. Furthermore, after this vegetation net 1 is stretchingly provided on a slope surface, a vegetation base material is sprayed over the slope surface from the upper part of the net 1 where at least one kind of seeds, fertilizers, soil conditioner and water retention agent are compounded in the vegetation base material.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vegetation net for protecting a slope and revegetation, and for introducing a specific plant such as a flower to the slope, and a revegetation method using the net.

[0002]

2. Description of the Related Art Conventionally, in the protection and revegetation work of a hillside formed by road construction, land reclamation, etc., various conditions are required depending on conditions such as soil quality and gradient of the slope or conditions required for aesthetics. Construction methods have been developed.

[0003] For example, the seed spraying method is used for the slope of the soil and the slope which is relatively suitable for greening, and the thick-layer soil spraying method or the lattice frame and the thick-layer soil are used for the rock slope or the steep slope. A combination of spraying methods is being implemented.

[0004] In addition, many slope protection greening materials and construction methods have been developed, but vegetation nets have become particularly popular in recent years. As a material for vegetation nets, the mainstream in recent years is made of corrosion-resistant fibers such as polypropylene and other synthetic fibers. there were.

[0005] The characteristics of each of these are made of corrosive fibers, while the whole is completely corroded and has no residue, but none of them retains the shape of the net.
The problem was that the effect of preventing the outflow of soil and rocks on the slope surface was significantly reduced. On the other hand, those formed of corrosion-resistant fibers are intended to compensate for the above-mentioned disadvantages, and to prevent the outflow and collapse of earth and sand by a net for a long time, to protect slopes, and to introduce vegetation. I have.

However, since the net is not corroded, the mesh is coarse and uniform, and if the seeds such as grass are rapidly greened by spraying, the grass grows on the entire surface and the slope can be protected. , It is difficult to simultaneously introduce certain plants on the slope, such as flowers and trees, which are slow growing compared to pasture and are easily subjected to pressure by other plants,
If it is forcibly performed, after planting the greening work, planting after work such as partially cutting grass growing on the slope surface, shaving off the surface soil, or cutting the net remaining on the surface It had to be done and required a lot of work.

[0007]

Therefore, the present inventors have conducted various studies on the texture and corrosivity of the vegetation net.
The inventors have found that the above-mentioned problems can be solved by using a net that is woven to such an extent that plant seeds and the like cannot be partially settled by corrosive fibers and cannot grow, thereby completing the present invention.

[0008]

That is, according to the present invention, there is provided a vegetation net in which the dense and dense portions are formed of fine denier corrosive fibers in a vegetation net which repeats the density at appropriate intervals in the longitudinal direction, and The vegetation net is characterized in that the dense portion is knitted and woven so tightly as to prevent plant invasion, and the weft constituting the sparse portion is composed of thick denier corrosive fibers. A greening method characterized by spraying a seed and a vegetation base material containing at least one of fertilizer, soil improvement material and water retention material from above the net after stretching a vegetation net on a slope.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a front view of a vegetation net according to the present invention.

As the corrosive fiber used in the net of the present invention, various types such as animal, vegetable, and chemical can be used. As the animal and vegetable fiber, leather, hair, cotton, hemp, pulp and the like can be used. A typical example is a natural fiber. As the chemical fiber, a polyolefin fiber or a biodegradable plastic which is easily corroded by a chemical can be used.

[0011] Chemically corrosive polyolefins are suitable for use in industrial production. In addition, flat yarns, which are generally called regenerated fibers, can be mentioned. In particular, viscose rayon can be manufactured in the same way as conventional corrosion-resistant fiber nets when manufacturing nets, and has excellent water absorption. Material that is effective for vegetation.

These can be used alone or mixed with different deniers or different fibers to adjust the corrosion time, but from the viewpoint of strength, 1,000 to 3,000 denier, preferably around 2,000 denier is desirable. .

The method of knitting and weaving these to form a net will be described. The number of wefts inserted into warp yarns arranged at equal intervals in the horizontal direction is changed, and knitting is repeated so as to repeat density at appropriate intervals in the vertical direction. .

Most commonly, the pitch is arbitrarily selected at intervals of about 50 cm to 1 m in a sparse part and about 20 to 50 cm in a dense part.

The net (1) usually has a width of 1.5 to 2 m and a length of 10 to 30 m, and has reinforcing ropes (4) at both ends and a center.
And the package is rolled. In this embodiment, weaving is performed using corrosion-resistant fibers as warp yarns.

At this time, in the sparse portion (2), the yarn interval of both the warp and the weft is not particularly limited as long as the plant can grow, but the corrosion period is delayed as compared with the dense portion (3). For this purpose, a thick denier weft yarn is used.

On the other hand, in the dense portion (3), the weft of fine denier corrosive fiber is driven so densely that the plant cannot grow, so that the corrosion time is earlier than in the sparse portion. As a specific example, the dense portion (3) is formed by changing the number of yarns to be driven depending on the yarn width of the weft yarn. In the case of a yarn of about 000 denier, 10 to 20 yarns / inch are required for forming the dense portion (3). Sparse part (2), dense part (3)
For example, a thicker yarn of 3,000 denier is used for the sparse portion (2) and a thinner yarn of 1,500 denier is used for the dense portion (3). It is formed by driving 15 to 25 wires / inch. As described above, the corrosive weft used in the sparse portion (2) and the dense portion (3) has a difference in the timing of corrosion depending on the thickness. For example, when a visco-rayon is used as the corrosive fiber yarn, it is 3,000.
Denier yarns erode in about six months, and 1,500 denier yarns erode in about two months.

The net formed as described above is stretched on the slope (7) as shown in FIG. 2, and grass seeds are used as seeds on the net (1), as well as fertilizers and soil improving materials. By spraying a vegetation base material containing one or more water retention materials, the greening method of the present invention is completed.

In the present invention, the net sparse part (2) in the initial stage of construction
Erosion on the slope is prevented by the pasture (5) that has grown. On the other hand, in the dense portion of the net (3), the grass seeds introduced by the spraying method or the like cannot grow due to the inability to germinate mainly by drying, and a portion without vegetation is formed on the slope in a contour shape. However, as the time elapses, the corrosive fiber portion of the net, that is, the dense portion is corroded, the ground surface is exposed, and plants can grow.

Therefore, a plant that grows slower than the pasture (5) such as a flower (6) or a tree and is easily subjected to pressure by other plants is sown or planted in this portion.

[0021]

According to the present invention, there is provided a vegetation net in which the dense and dense portions are composed of fine denier corrosive fibers, and the dense portions are infiltrated by plants. A vegetation net characterized by being densely woven to an unacceptable degree, and a weft constituting a sparse portion being made of a thick denier corrosive fiber. The tree planting method is characterized by spraying seeds and a vegetation base material containing at least one of fertilizers, soil improvement materials and water retention materials from the net after stretching, and thus has the following effects.

That is, when the vegetation net of the present invention is stuck on a slope, plants showing vigorous growth such as pasture can be suppressed by the dense portion of the net for a certain period immediately after construction.
After that, the dense part is corroded, and the space for sowing or planting plants that are slow growing compared to pastures such as flowers and trees and are easily subject to pressure by other plants can be secured. The reliable introduction of flowers and trees to the slopes, which are susceptible to pressure by other plants, while ensuring surface protection without the need for special work such as cutting grass, cutting the soil, and cutting the net Sowing or planting can be easily performed, and labor can be saved significantly.

[0023]

[Brief description of the drawings]

FIG. 1 is a front view of a vegetation net of the present invention.

FIG. 2 is a partial cross-sectional view showing a state where a net is stretched according to the present invention.

FIG. 3 is a partial cross-sectional view showing a greening state of a slope using the net of the present invention.

[Description of sign]

(1) is a net, (2) is a sparse part, (3) is a dense part, (4)
Is a reinforcement rope, (5) is grass, (6) is a flower, and (7) is a slope.

Claims (2)

[Claims] 1. A vegetation net which alternates in density in a vertical direction at an appropriate interval, wherein the weft constituting the dense portion is made of fine denier corrosive fiber, and the dense portion does not allow plant penetration. The weft is densely woven and the sparse part is thick denier.
A vegetation net made of corrosive fibers of vegetation. 2. After the vegetation net according to claim 1 is stretched on a slope, a vegetation base material containing one or more of seed, fertilizer, soil improvement material and water retention material is sprayed on the net. And the greening method.