JPS63201211A - Slope vegetation work and jute cloth therefor - Google Patents

Abstract

PURPOSE:To prevent the occurrence of drying damage and scouring by covering seeds, etc., with a jute cloth. CONSTITUTION:Pit sand, devil tongue powder, and coating fertilizer are mixed with water while stirring and sprayed onto the ground's surface to form a vegetation ground 2. Plants adhered with finely cut dry grass are attached in an uniform layer to the inner surface of a jute cloth 4, and a vegetative jute cloth 3 formed by attaching seeds 6 to the plant layer 5 is laid on and fixed to the ground 2. Thereby the occurrence of dry damage, e.g., withering of vegetation, and also of scouring soil by rain fall can be prevented.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention is used to protect soil and rock slopes artificially created through civil engineering work, or bare ground that has collapsed due to water damage, etc., by greening with natural plants. The present invention relates to a slope greening construction method and a greening linen fabric for the method.

[Conventional technology]

The inventor and applicant of the present application firstly disclose that
In No. 229 (Japanese Patent Application No. 57-200937), the invention of a slope greening method and a greening net for the method was provided.

One of the above-mentioned inventions consists of a first step of stirring mountain sand, konjac powder, and coating fertilizer in advance and spraying this onto the ground surface while mixing it with water to form a vegetation base, and a first step of forming a vegetation base on one side of the net body. a second step of attaching dried grass or coconut fibers with vegetable glue to form a plant layer with a substantially uniform thickness, and spreading and adhering seeds to the plant layer to form a greening net; The greening net of the second step is stretched and fixed on the vegetation base of the first step so that the seeds and plant layer are located on the inner surface of the net body and in contact with the vegetation base.

In another invention, dried grass or coconut fibers are attached to one side of a net body using vegetable glue to form a plant layer of approximately uniform thickness, and seeds are scattered and attached to the plant layer. be.

Secondly, the inventor and applicant of the present application have proposed a slope greening method in which a perforated paper body is interposed between the net body and the plant layer in the first step and the second step in the first invention. We provided greening nets for the Andome construction method.

Thirdly, as another technique, in Japanese Utility Model Publication No. 55-47955, rigid natural fibers such as coconut fibers, soybean fibers, sisal fibers, and hop vein fibers are interlaced to make the fibers mutually The area density of the contact area bonded with adhesive is approximately 0. A sheet-like fibrous body having a coarse mesh of O1 to 0.1 g/-, and a plurality of fixing strings that are fixed to one side of the fibrous body and arranged in parallel at least in one direction, and the above-mentioned fixed strings are adjacent to each other. A sample of a topsoil stabilizing net characterized by an interval of 101 or more is also provided.

[Problem that the invention seeks to solve]

However, in the first invention, since the mesh of the net is relatively large, when finely cut grass or palm fibers are directly sprayed and attached to the net, the fibers cannot be completely attached to the net during the spraying process. The adhesion rate of the plant layer is somewhat poor because it often spills and the adhesion area using the fiber strings forming the mesh is relatively small, and when it is stretched and fixed on a slope, the plant layer is relatively rough. Therefore, if the plant experiences heavy rainfall, there is a risk that the seeds may be washed away or the soil may be scoured by the rain that has passed through the plant layer.

Next, in the second invention, direct sunlight and rain and wind are avoided by the intervention of the perforated paper body, so that
It is possible to prevent death due to dryness and damage caused by dryness in the early stages of growth, and also to prevent washing away due to soil scouring caused by rainfall.

However, the second invention also lacks water retention and has almost no shrinkage, so it does not fit well with the surface of the ground, and since it is made of paper, it easily breaks during construction work and is difficult to handle. Yes, but it must be used in conjunction with a net for installation.

In addition, in the third prior art, since the sheet-like structure is made of coarse fibers, when it is stretched on a slope, if it encounters strong rain, the seeds will be destroyed as in the first invention. There is a risk of washing away and soil from the ground being scoured.

[Means for solving problems]

Therefore, the present invention aims to solve the problems of the prior art and achieve slope greening even more effectively by utilizing the above-mentioned conventional related technology and adding a new technology.

In order to achieve this purpose, one of the present inventions is a slope greening method in which mountain sand, konjac powder, and coating fertilizer are stirred in advance and mixed with water and sprayed onto the ground surface to create a vegetation base. The first step is to attach finely cut dead grass to the inner surface of the linen fabric to form a plant layer with a substantially uniform thickness, and also to form a green linen fabric by scattering and adhering seeds to the plant layer. The greening linen material of the second step is stretched and fixed on the vegetation base of the first step so that the seeds and plant layer are in contact with the vegetation base.

Another aspect of the present invention is a greening linen material for use in a slope greening method, in which finely cut dead grass is attached to the inner surface of the linen fabric using vegetable glue to form a plant layer with a substantially uniform thickness. Seeds are scattered and attached to the plant layer.

〔Example〕

Next, examples of the present invention will be described.

(1) Construction of the vegetation base (first step) The construction of the vegetation base in the first step of the present invention is carried out by the first step of the technical means in the patented invention of Patent No. 1322986 owned by the present applicant.

That is, a slurry made by mixing mountain sand containing pumice, fertilizer, flying konjac powder, and water is sprayed onto the slope 1 to a thick thickness t of about 10 cm to provide the vegetation base 2.

As the mountain sand of the vegetation base 2, it is originally desirable to use high-quality loam soil such as black soil with a high organic content.However, in reality, the construction site is located in a remote mountainous area and under harsh conditions. Therefore, it is difficult to procure large quantities of high-quality loam soil.

Therefore, we used mountain sand containing pumice, which had been avoided due to its low nutrient content, and mixed it with the materials from the first step to make it similar to effective loam soil.

In addition, konjac fly powder is powder that is scattered from the stone mill when refining konjac powder from konjac potatoes and is unsuitable as refined powder, and the general components (%) of the fly powder are
The ratio is moisture - 13.64, crude protein = 14.30, crude fat - 0.48, ash - 8.26, fiber - 5.13, and soluble nitrogen-free matter - 58.19. Contains nutrients suitable for plant growth.

Furthermore, coated fertilizers can be used at a soil temperature of 25°C, for example.
When the number of days it takes for nitrogen nutrient 801 to elute is in the range of 100 days to 700 days, 100 days, 18
Slow-release fertilizers set for 0 days, 360 days, and 700 days shall be used in appropriate combinations, and specifically, commercially available High Control (-trade name, Asahi Kasei Kogyo @) is suitable.

(2) Preparation of green linen body (second step) Green linen body 3
In producing this, a glue is sprayed onto the inner surface of a fabric 4 woven from natural hemp fibers while falling and scattering finely cut dead grass, so that it adheres to a substantially uniform thickness to form a plant layer 5, and the Seeds 6 are scattered and attached to the plant layer.

As shown in the third diagram, the linen fabric 4 is made of coarsely woven linen fibers.Specifically, the maximum size of each piece is set to 2m in diameter and 10m in length. .

The plant layer 5 attached to the inner surface of the linen fabric 4 is made of grass or other dead grass for fodder, or coconut fibers that have been finely cut into appropriate lengths and dried, but coconut fibers are becoming difficult to obtain. However, since the cost is high, in reality, weeds and other dried grasses that can be procured domestically are sufficient.

Incidentally, to explain an example of manufacturing the green linen body 3, the motor m
A hopper 13, an input chamber 14, a glue spraying device 16, a fertilizer and seed dispersion tank 17, and a compression roller 18 are provided on a belt (made of wire mesh) conveyor 1) driven by a belt (wire mesh) conveyor 1) from the proximal end side in the direction of movement.

Then, a roll of linen fabric 4 is placed from the base end of the conveyor 1) and gradually fed out in the direction of travel, and dried grass cut to an appropriate length by the cutting tank 12 is put into the hopper 13. Then, an electric stirring and feeding mechanism (not shown) provided in the hopper 13 drops and supplies the dry grass into the charging chamber 14, where the dry grass is formed into a substantially average thickness using a fan 15 or the like.

On the other hand, in front of the feeding chamber 14, a vegetable glue is applied to the dead grass using the glue spraying device 16 in advance and attached to the linen fabric.
Next, in the seed/fertilizer dispersion tank 17, the seeds 6 are spread and adhered to the dried grass along with the fertilizer, and then the dried grass is compressed with a compression roller 18 to a uniform thickness of about 0.5 to 2.0 cm. Then, the sprayed paste is dried in the drying chamber 19. In addition, seeds 6 scattered on dry grass
Most of them invade and adhere to the surface or inside of the linen fabric 4 while the linen fabric 4 and the plant layer 5 are being conveyed by the conveyor 1).

[Construction example]

As a construction example of the present invention, for example, the thickness t of the sprayed layer is 10
In terms of cm, the composition per 100-cm sprayed area is as follows.

+1) Vegetation base (first step) Mountain sand (mountain sand containing pumice) 20d fertilizer (granular solid/highly chemical compound) 201g01g Tora feed (slow-release fertilizer - Product name: Hicon) Toru 180.700 etc. > 1
5-pupil konnyaku powder 2551g water
2000~2500J
(2) Greened linen fabric (2nd process) Linen fabric (coarse weave) 120n? Plant layer (dry grass for feed) 50-100n? Vegetable glue (udon flour) 5 seeds (Kentafukey 31 fescue, Clean Pishigure?F) 2 kg anchor (main) 15 anchors (mekushi) 300 pieces Next, we will explain the construction procedure for slope greening work according to the present invention. .

First, floating stones, wood chips, etc. are removed from the slope where construction is to be performed, and mountain sand, konnyaku dust, and coating fertilizer, which have been made lightweight and stirred without mixing with water, are poured into a known mortar spraying machine. Then, this is sent to the nozzle by the wind pressure of the compressor, and while adding water at the time of nozzle injection, it is sprayed onto the ground surface 1) via the spraying machine and the compressor with the injection nozzle to a set thickness in the range of 1.0 to 101. Form a vegetation base 2.

In this case, the hardness of the vegetation base 2 is measured using a soil hardness meter (Yamanaka type).
If the hardness exceeds 27, the penetration development of seed roots will be poor, while if the hardness is lower than 23, the root threads will develop well, but the sprayed layer will not solidify and will be washed away, resulting in a failure to reach the specified base thickness. Therefore, the soil hardness should be set at around 23 so that the root threads can develop well and the vegetation base 2 can be properly hardened and fixed by spraying to a predetermined thickness.

After the surface water of the vegetation base 2 caused by the spraying in the first step recedes and hardens, a second layer is formed so that the seeds 6 and the plant layer 5 attached to the back side of the linen fabric 4 are in contact with the vegetation base 2. The linen fabric 3 in the process is stretched on the vegetation base 2, the edges of the greening linen fabrics are overlapped on the base, and anchors 7 are driven into the area and other required places to fix it.

〔Effect of the invention〕

Since the present invention has the above-described structure, the seeds and the plant layer in contact with the vegetation base are covered with a linen body made of coarsely woven hemp fiber cloth, so that the seeds and the plant layer in contact with the vegetation base are covered with a linen body made of a coarsely woven hemp fiber cloth. Compared to a covering, it has better water and heat retention properties, eliminates dryness damage such as withering in the early stages of growth, and can effectively prevent soil scouring caused by rainfall, etc.

Since the material of linen fabric is natural linen fibers, it is flexible and has an extremely low shrinkage rate, so it blends well with other materials.It is also much stronger than perforated paper, so it is resistant to damage. This makes construction work easier.

Additionally, although the linen fabric used for greening seems to have less space for germination compared to the small holes for germination in nets and paper, the weave has an extremely coarse weave, so germination can occur from any point without bending. This essentially produces the same effect as having small holes all over the linen fabric. This allows the seeds to absorb adequate amounts of nutrients while blocking direct sunlight, promoting germination and rooting.

In addition, the vegetation base is made of mountain sand that does not contain nutrients but is rich in water permeability and air permeability, which is easily procured. By mixing konjac dust and coating fertilizer, nutrients are leached over a long period of about 100 to 700 days. A slow-acting vegetation base is obtained.

Furthermore, konjac powder is used as an adhesive, and since it contains 37.9% nitrogen, soil temperature 2.
After 30 days under the condition of 5℃, the hit will be 12.5
% is converted into fertilizer and further promotes the germination and growth of seeds.

The green linen fabric stretched over the vegetation base has a plant layer and seeds scattered and attached to the inner surface of the linen fabric, so when the seeds take root, they invade the vegetation base from the plant layer and develop, eventually forming a foundation in the ground. The above-mentioned plant layer on the side of the linen body, which takes root and takes root in
Since this is pre-dried grass such as weeds, it will begin to rot in about a month if it absorbs moisture from rainfall after construction, and this will turn into organic fertilizer, which has the effect of promoting the germination and growth of seeds.

[Brief explanation of the drawing]

The drawings show an embodiment of the slope greening construction method and the greening linen material for the method according to the present invention, and FIG. 1 is a schematic front view, and FIG.
The drawings are an enlarged sectional view taken along the line 2-2 in FIG. 1, FIG. 3 is a perspective view of the hemp cloth for greening, and FIG. 4 is an explanatory view showing the manufacturing process of the hemp cloth for greening. l...Mound 2...Vegetation base 3...Green linen fabric 4... Linen fabric 5...Plant layer 6...・・・Seed 7・・・Anchor Figure 1 Figure 2

Claims (2)

[Claims] (1) The first step is to mix mountain sand, konjac powder, and coating fertilizer in advance and spray it onto the ground surface while mixing it with water to form a vegetation base, and the dry grass cut into fine pieces on the inner surface of the linen fabric. The second step consists of forming plants with a substantially uniform thickness and scattering seeds on the plant layer to form a green linen. A slope greening construction method characterized by stretching and fixing greening hemp fabric so that its seeds and plant layer are in contact with the vegetation base. (2) Slope greening characterized by attaching finely cut dead grass to the inner surface of linen fabric using vegetable glue to form a plant layer of approximately uniform thickness, and also by scattering and adhering seeds to the plant layer. Greening linen material for construction methods.