JP3463784B2 - Vegetation mat for river embankment - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vegetation mat for river embankment for protecting a river hydrophilic area and greening it.

[0002]

2. Description of the Related Art Conventionally, a greening construction using a vegetation mat has been carried out in order to protect a river hydrophilic area and green the area. As a construction method, for example, a vegetation base material containing seeds, fertilizers, water retention materials, etc. is stored in a mat formed of a water-resistant synthetic fiber material, and the vegetation base material is laid on the slope of the waterside to anchor or peg. There is one that is fixed by using the above.

Further, a vegetation bag in which a vegetation base material is stored by forming a double bag-shaped portion on a net woven and woven with a durable synthetic fiber material in an appropriate mesh, is stored in the bag-shaped portion, There is also a construction method in which this is set and laid on the slope of the water.

In such a construction method, the mat and the net prevent the vegetation base material from running away, the fertilizer is appropriately supplied to the germinated and grown plant, the growth of the plant is promoted, and the early stable greening of the waterside is achieved. Achieved and the mat and net prevent slope erosion.

[0005]

However, before the plants grow, the mat or net may be cut off by the water flow of the river, and there is a problem in durability for waterside construction. In addition, the mats and nets often lack water retention and heat retention properties, and direct sunlight may cause significant evaporation, resulting in problems such as dry seeds and fertilizers and freezing. It was

On the other hand, even after the plants grew, the fibers constituting the mat and net did not disappear and remained semipermanently, which sometimes caused pollution problems. In particular, recently, due to the revision of the law, the importance of environmental protection of rivers has come to be emphasized, and measures against it have been desired.

The present invention has been made in view of the above circumstances, has strength, and does not cut the mat by running water of the river,
It is an object of the present invention to provide a vegetation mat for river embankment, which has excellent evaporation prevention effects and heat retention effects and does not cause pollution problems.

[0008]

The present invention has means for solving the above-mentioned problems as follows. In other words, the river embankment for the vegetation mat of the present invention is, heaven coconut fiber
A net made of biodegradable synthetic resin is attached to one side of a thin coconut mat formed with natural rubber adhesive to a thickness of 0.3 to 10 mm and a basis weight of 100 to 500 g / m ² , and a vegetation sheet on the other side. Is attached, and these are integrally sewn to each other with an appropriate mesh (Claim 1).

The suturing is performed with a thread made of biodegradable synthetic resin fiber, for example (claim 2).

[0010]

[0011]

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of a vegetation mat for river embankment (hereinafter referred to as a mat) according to the present invention will be described in detail below. 1 is a schematic sectional view of the mat M, and FIG. 2 is an exploded perspective view. In these drawings, reference numeral 1 is a plastic net, 2 is a coarse palm mat in which palm fibers are entwined,
3 and 4 are water-soluble or water-decomposable paper cloth pieces, 6 is a vegetation base material such as seeds, fertilizers, soil improving materials, etc. sandwiched between the paper cloth pieces 3 and 4, 7 is a mesh or cloth piece, 8 Is a suture thread which is used to sew and integrate a plastic net 1, a palm mat 2, a vegetation sheet 5 made of paper cloth pieces 3 and 4 holding a vegetation base material 6 and a mesh 7 in this order.

The above-mentioned plastic net 1 is, for example, 3
A monofilament having a denier of 00 to 2000, a flat yarn, a split yarn, a multifilament, etc. are knitted and woven into a net having a mesh of 5 to 30 mm. Corrosion-resistant resins such as polyethylene may be used when required.

The biodegradable synthetic resin is, for example, a natural polymer synthetic resin such as a complex of chitosan and cellulose, a microbial fermentation aliphatic polyester (for example, Shimadzu's trade name, lactolone), or fermentation of biocellulose. As a synthetic resin for production, and further as a synthetic resin for chemical synthesis, aliphatic polyester e-caprolactone-based or e-caprolactone-based aliphatic polyester that is a condensation of dicarboxylic acid and diglycol (for example, products of Showa High Polymer Co., Ltd. Name, bionole) etc. can be used.

As the coconut mat 2, a coconut mat made by bonding coconut fibers with an adhesive ( natural rubber ) is used.
The weight of the mat is 100 to 500 g / m ² . If it is too thin, the effect of preventing runoff is small, and if it is too thick, the germination of plant shoots is inhibited. The coconut mat 2 has an excellent heat insulating property and a high evaporation suppressing function, and when it is attached to the slope, it has a high function of preventing the movement and runoff of the surface soil on the slope. Generally, it will not corrode within 2 to 5 years after construction and leave no residue, so it will not cause pollution problems.

The vegetation sheet 5 is formed by sandwiching a vegetation base material 6 such as seeds, fertilizers and soil conditioners between two water-decomposable or water-soluble paper cloth pieces 3 and 4, and a kayak for reinforcement on one side. It is preferable to use ground. By holding the kaya ground on the lower side, the holding property of the large-sized fertilizer and the like that is sandwiched is improved. For kaya, use corrosive nets such as Sufu. Also, one in which a thin cotton is adhered to one surface of a corrosive net, and seeds, fertilizers, etc. are adhered thereto can be used.

As the suture thread 8, a biodegradable resin fiber thread, a hemp thread, a cotton thread, etc. can be used as a constituent of a corrosive product, and when it is not necessary to corrode (some constituent materials are If you have a corrosion-resistant function and need to maintain the slope protection effect), use a corrosion-resistant polyester,
Threads such as vinylon can be used. Twisted yarns are mainly used as these yarns, and yarns having a thickness of 0.5 to 3 mm are used. In the case of plastic yarn such as polyester, monofilament-like yarn can be used, and in this case, about 0.3 mm. It is possible to use a high-strength plastic thread even for a thread of The stitches may be stitched in the longitudinal direction at intervals of 3 to 50 cm (see FIG. 3 (A)).

As another stitching method (see FIG.
(See (B)), it is also possible to use a stapler to integrate the materials at the above intervals. In this case, stitching can be performed with relatively simple equipment, and the cost is low. still,
In FIG. 3B, 9 is a stapler needle.

A corrosive material is used as the material of the net-like body 7 of the lowermost layer which comes into contact with the slope, and for example, hessian cloth (a piece of coarse linen cloth), rayon nonwoven fabric, biodegradable resin net, cotton cloth and the like. Can be used. A cloth material (not shown) may be used instead of the mesh 7.

When the mat M constructed as described above is mainly laid on the slope of the river hydrophilic region, for example, the low water floor 11 (see FIGS. 4 and 5), the palm mat 2 itself has an appropriate durability. However, since the plastic net 1 is stretched over it, it has sufficient strength and is not cut by running water. In addition, it can be applied to steep slopes because it is highly effective in preventing the slope surface soil from collapsing. And since the palm mat 2 has a high evaporation preventing effect,
It is possible to secure sufficient water for germination and growth of plants even in dry areas and when there is little rainfall. Also,
The palm mat 2 has an excellent heat retention effect, can also prevent frost heave, and has a high germination / growth promotion effect, so that an early stable slope greening is possible. If necessary, a peg or an anchor (not shown) may be placed and fixed.

Since the plastic net 1, the palm mat 2, the paper cloth pieces 3, 4 and the mesh 7 which are the main members constituting the above-mentioned mat M are corrosive and do not leave a residue on the slope, No pollution problems will occur.

Further, the fertilizer bag prepared separately may be attached to the mat M. In that case, for example, as shown in FIG.
The fertilizer bag 23 may be inserted into the bag-shaped portion 71 formed in the net-like body 7 in the lowermost layer, and long-term stable replenishment and water retention effect of fertilizer nutrients to the fixed plant are exhibited, and more stable and reliable greening can be achieved. Can be promoted.

As the vegetation sheet 5, instead of sandwiching the vegetation base material 5 between the two water-soluble paper cloth pieces 3 and 4, although not shown, the surface of the paper cloth piece 3 has vegetation bases. It may be a stretched grass body or the like in which the material 6 is adhered with a water-soluble adhesive. Alternatively, the vegetation substrate 6 may be directly adhered to the net-like body 7 with a water-soluble adhesive, the plastic net 1 and the palm mat 2 may be laminated and sewn together.

[0024]

As described above, the vegetation mat for river embankment of the present invention has a thickness of 0.3 to 10 mm and a basis weight of 100 to 500 g / m ² by using a natural fiber adhesive for palm fibers.
The net made of biodegradable synthetic resin is attached to one side of the coconut mat formed in, the vegetation sheet is attached to the other side, and these are integrally sewn in appropriate meshes, so the strength is Yes, even if constructed on slopes such as river hydrophilic areas,
The mat is not cut by running water, the palm mat has an excellent heat retention effect, prevents frost heave, has a high germination / growth promotion effect, and can effectively prevent the slope surface soil from collapsing. In addition, the palm mat has a high evaporation preventing effect and can secure water for germination and growth of plants.
Since the main constituent members such as palm mat, net and vegetation sheet are corrosive, no residue remains on the slope and no pollution problem occurs.

[Brief description of drawings]

FIG. 1 is a sectional view showing an example of a vegetation mat for river embankment of the present invention.

FIG. 2 is an exploded perspective view of the vegetation mat for river embankment.

FIG. 3A is an explanatory diagram of a suturing operation using a thread, and FIG. 3B is an explanatory diagram of a suturing operation using a stapler.

FIG. 4 is a cross-sectional view showing a construction state of the river embankment vegetation mat in a river hydrophilic region.

FIG. 5 is a perspective view showing the construction state.

FIG. 6 is an exploded perspective view showing another example of the vegetation mat for river embankment.

[Explanation of symbols]

1 ... Corrosive net, 2 ... Palm mat, 5 ... Vegetation sheet,
8 ... suture.

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Kazumasa Shibata               1 Japanese planting at 590 Takao, Tsuyama City, Okayama Prefecture               Raw Co., Ltd.                (56) References JP-A-8-13499 (JP, A)                 JP-A-6-212510 (JP, A)                 JP-A-8-92960 (JP, A)                 JP-A-7-216897 (JP, A)                 JP-A-7-224431 (JP, A)                 58-158620 (JP, U)

Claims (2)

(57) [Claims] 1. A net made of a biodegradable synthetic resin is attached to one side of a thin coconut mat formed of a coconut fiber with a natural rubber adhesive to a thickness of 0.3 to 10 mm and a basis weight of 100 to 500 g / m ^2. Then, attach the vegetation sheet to the other side,
A vegetation mat for river embankment, which is integrally stitched together in an appropriate mesh. 2. The vegetation mat for river embankment according to claim 1, wherein a thread made of biodegradable synthetic resin fiber is used for the suture.