JPS6221937B2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Industrial Application] 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. This relates to the slope greening method.

[Conventional technology]

The present inventor previously provided an invention related to a seed spraying method using flying powder of konnyaku in Japanese Patent No. 992813. As a result, instead of chemical agents such as asphalt emulsion and urea-formaldehyde resin foam powder used in the conventional slope spraying method, pure vegetable konjac dust was used to form a film on the slope surface layer. This prevents seeds and fibers from being blown away by wind and can also be used as a slow-release fertilizer. Moreover, it has no irritating odor or strange odor, and is effective in preventing pollution such as environmental destruction caused by chemical damage.

By the way, in the above-mentioned patented invention, since a slurry is created by stirring and mixing seeds, fertilizer, and fibers with water, the seeds are naturally mixed into the slurry. Therefore, the thickness of the sprayed layer made of the slurry is usually about 1 to 3 mm. on the other hand,
The present inventor also provided a construction method in which soil is added and sprayed to the above-mentioned patented invention (Patent No. 1322986,
No. 46923”). According to this, the thickness of the sprayed layer containing top soil is set in the range of 1 to 10 cm. Therefore, if the sprayed layer is about 1 to 2 cm thick, seeds buried within the layer will germinate normally.

[Problem that the invention seeks to solve]

However, in the above-mentioned conventional technology, for example, slopes made of rock fragments cut down by excavation work such as tunnels, and slopes with severe unevenness of the ground surface found in hard rock cuttings are not suitable. Because the soil quality is extremely poor, a spray layer of 10 cm thick is required for greening.
It needs to be thicker in the front and back. In such cases, seeds buried near the surface of the sprayed layer will not have any problem in germination, but seeds buried in the middle or near the bottom of the sprayed layer will be difficult to germinate and will simply dry up. Seeds are often stored away, resulting in a poor yield rate for seed growth.

[Means to try to solve problems]

Therefore, the present invention aims to solve the conventional problems and obtain slope greening even more effectively by utilizing the related technology of the above-mentioned patented invention and adding a new technology. . In order to achieve the above object, one of the present inventions is to form a vegetation base by stirring mountain sand, konjac dust, and coating fertilizer in advance and spraying this onto the ground surface while mixing it with water. One step is to form a greening net by attaching dried grass or palm fibers to one side of the net body using vegetable glue to form a plant layer of approximately uniform thickness, and then scattering and adhering seeds to the plant layer. Second to do
A greening net is stretched and fixed on the vegetation base so that the seed/plant layer is located on the inner surface of the net and is in contact with the vegetation base.

〔Example〕

That is, the present invention uses mountain sand instead of removing the seeds and making a slurry in advance from the slurry made by stirring and mixing seeds, fertilizer, fibers, flying powder of konnyaku, and water in the invention of Patent No. 992813. , Conjac powder/coating fertilizer is stirred in advance and sprayed onto the surface ₁₁ of the ground 1 while being mixed with water when sprayed from a nozzle to form a vegetation base 2 of a predetermined thickness t. On the other hand, a dry plant layer 4 is formed on the net body 3, and seeds 5 are attached to the plant layer to form a greening net 6. The greening net is brought into close contact with the vegetation base 2, and the anchor 7 By fixing the seeds in place, the seeds germinate and the seed roots grow on the surface of the vegetation base.

For the mountain sand of Vegetation Base 2, it is desirable to use high-quality loam soil such as black soil with high organic content, but since the construction site is often located in a mountainous area or other harsh conditions. However, it is difficult to procure large amounts of high quality loam soil. Therefore, we used mountain sand containing pumice, which had been avoided due to its low nutrient content, and made it similar to loam soil, which is effective.

In addition, konjac powder is a powder that is scattered from the stone mill when refining konjac flour from konjac potatoes and is unsuitable for milling.The general components (%) of the fly powder are: Moisture 13.64 Crude protein 14.30 Crude fat 0.48 Ash 8.26 Fiber 5.13 Soluble nitrogen-free substances As per 58.19.

In addition, coating fertilizers can be applied to e.g. soil temperature
In the range of 100 to 700 days, the number of days it takes for 80% of nitrogen nutrients to elute at 25℃ is 100 days.
Slow-release fertilizers set for 1 day, 180 days, 360 days, and 700 days shall be used in appropriate combinations, specifically commercially available High Control (trade name, Asahi Kasei Industries, Ltd.)
is suitable.

Also, in the greening net 6, the width w of the net body 3 is
2m, polyethylene with a mesh size of about 1.2cm x 1.2cm,
The plant layer 4, which is made of synthetic resin such as nylon and is attached to one side of the net, is made of grass for feed that has been finely chopped to an appropriate length or dried palm fibers, and udon flour as raw materials. After spraying the glue using a special machine or manually placing it in an approximately average amount,
It shall be leveled with a roller, etc. so that it has a uniform thickness of approximately 0.5 to 2.0 cm.

By the way, to explain an example of manufacturing the greening net 6, a belt (made of wire mesh) conveyor 1 driven by a motor m.
1, from the proximal end side in the traveling direction, the hopper 13
and input chamber 14, glue spraying device 16, seed scattering tank 1
7. A compression roller 18 and a drying chamber 19 are provided.

Then, the net body 3 is placed on the base end side of the conveyor 11 and gradually fed out in the advancing direction, and the hopper 13 is filled with hay cut to an appropriate length by the cutting tank 12. An electric agitation and feeding mechanism (not shown) installed in the machine feeds the hay dropwise into the input chamber 14, where a fan 15 or the like is used to reduce the hay to an approximately average thickness, and a glue spraying device 16 is used to spread the hay. Apply vegetable glue to it and attach it to Net 3. Next, the seeds 5 are spread and adhered onto the hay in the seed scattering tank 17, and then the hay is compressed to a uniform thickness of about 0.5 to 1.0 cm using the compression roller 18, and the sprayed glue is further dried in the drying room 19. .

Next, to show an example of the construction of the present invention, the thickness of the sprayed layer is 10
The formulation per cm and sprayed area of 100 ^m2 is as follows.

(1) Vegetation base (1st step) Mountain sand (including pumice) 17m ³ Flying powder of konjac 255Kg Coating fertilizer (slow-release fertilizer = product name: High Control 180, 700, etc.) 15Kg Water 1500-2000 (2) Greening Net (2nd process) Net body (mesh 1.2 cm x 1.2 cm) 120 m ² plant layers (dry grass for feed) 50-100 m ³ vegetable glue (udon flour) 5 Kg Seeds (Kentatsuki 31-Fuesk, Cleaving Grass, Huesque, etc.) 2Kg Anchors (main) 15 pieces Anchors (mekushi) 300 pieces Furthermore, the construction procedure of slope greening work according to the present invention will be explained. First, remove floating stones, wood chips, etc. from the slope where construction is to be carried out, and use a well-known mortar spraying machine with pre-measured and stirred mountain sand without mixing with water.
Add konjac dust and coating fertilizer. 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 ₁₁ through the spraying machine and the compressor with the spray nozzle, and the vegetation with the set thickness t is spread in the range of 1.0 to 10 cm. Form the base 2. In this case, when 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, and if the hardness is lower than 23, the root system will not develop well. However, the sprayed layer does not solidify and flows out, making it impossible to obtain the desired base thickness. Therefore, the soil hardness should be set at around 23 so that the root system can develop well and the base 2 can be properly hardened and fixed by spraying to a predetermined thickness.

And the vegetation base 2 by spraying in the first step.
Once the surface water has receded and solidified, the greening net 6 of the second step is stretched over the vegetation base 2 so that the seeds 5 and the plant layer 4 are interposed between the vegetation base 2 and the net body 3. At the same time, the base is covered with soil so that the greening nets come in close contact with each other, and the green sides of the adjacent net bodies are overlapped, and anchors 7 are driven into that part and other required places to fix it.

〔Effect of the invention〕

Since the present invention has the above-mentioned configuration, the vegetation base 2 is prepared by mixing konjac dust and coating fertilizer with mountain sand, which does not contain nutrients but is easily available and has good permeability and air permeability, for 100 to 700 days. A slow-acting vegetation base where nutrients are leached over a long period of time 2
is obtained. Konjac powder is used as an adhesive, but since it contains 37.9% nitrogen, 12.5% of it will turn into fertilizer after 30 days at a soil temperature of 25°C. Further promotes seed germination and growth.

The greening net 6 stretched over the vegetation base 2 is
A plant layer 4 is formed on the inner surface of the net body 3, and seeds 5 are scattered and attached to the surface of the layer, so that when the seeds 5 take root, they invade the vegetation base 2 and develop, and eventually take root in the ground 1. Take root. In addition, since the seeds are protected from direct sunlight by the plant layer 4, drying damage such as withering due to drying and other drying damage in the early stages of seed growth is prevented, and germination starts at least 3 to 5 days earlier than in exposed seeds. At the same time, the yield rate of germination and growth is greatly improved.

Furthermore, by attaching and fixing the greening net 6 to the vegetation base 2, rain and snow can be directly applied to the vegetation base 2.
It never hits. Therefore, even if a long period of rainfall occurs in the early stage of construction, the vegetation base 2 will not contain much water and will maintain an appropriate soil hardness, so it will not be difficult to install the base 2 on a steep slope or in a cold climate. Even in places where the ground is prone to freezing, the vegetation base 2 can be prevented from sliding or collapsing, and can be stabilized on the ground 1. However, the plant layer 4 on the greening net side
Since this is pre-dried hay, if water is added to the hay after application, it will begin to rot within a month or so, but this will turn into organic fertilizer and have the effect of promoting the germination and growth of seeds.
Furthermore, since the net body of the greening net is made of synthetic resin fibers and the plant layer 4 is made of hay, it is lightweight despite its large bulk, so it has good workability and is new and useful as a slope greening method.

[Brief explanation of the drawing]

Fig. 1 is a schematic front view showing an embodiment of the slope greening method according to the present invention, Fig. 2 is an enlarged sectional view taken along line 2-2 in Fig. 1, and Fig. 3 is a perspective view of the greening net. FIG. 4 is a schematic explanatory diagram showing the manufacturing process of the greening net. 1...Ground, 2...Vegetation base, 3...Net body, 4...
A greening net consisting of a dry plant layer, 5...seeds, 6...net bodies 3, a dry plant layer 4, and seeds 6.

Claims (1)

[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. The second step consists of attaching fibers to form a plant layer of approximately uniform thickness, and spreading and adhering seeds to the plant layer to form a greening net. A slope greening method characterized in that a greening net is stretched and fixed so that the seeds and plant layer are located on the inner surface of the net and in contact with the vegetation base.