JPS609174B2 - Slope protection method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention aims to improve a method for protecting slopes from erosion, and more specifically, after weeds are removed from the slope, a net is placed over the net, and synthetic soil containing grass seeds is spread over the net. The aim is to protect the slope from erosion by spraying it with grass and allowing the grass to take hold.

Methods of protecting slopes include concrete blocks, spraying mortar, transplanting grass, and spraying soil containing grass seeds, but the concrete block method has a short construction period but is expensive, and requires no running water. Not only does it have a poor relaxing effect, but it also lacks a sense of unity with the surrounding area in terms of aesthetics.

In the case of lawn transplantation, the construction period is short, but if the slope angle is large, construction is difficult, and there are restrictions on the transplanting time, roots are damaged during transplanting, and the lawn may be washed away with the soil due to heavy rainfall at the time of transplanting. It has disadvantages such as being covered with soil and dying. In the case of spraying synthetic soil containing grass seeds, heavy rainfall has no effect either before or after germination because the soil is exposed to the open field, and the seeds at the shoulder of the slope are washed away to the foot of the slope, causing vegetation to grow from the middle to the top of the slope. It has become defective. In addition, the dispersion of soil particles due to heavy rainfall can lead to leaching, and the roots of grass seedlings that have just sprouted for a month after germination are washed by rainwater and exposed to sunlight, resulting in less growth after germination.
Lawn seedlings that had grown to ~2 cm in height suffered a lot of damage. Therefore, an object of the present invention is to ensure that lawns can be transplanted reliably and to strongly protect slopes.Examples will be described below. Spread a synthetic fiber net 3 (hereinafter referred to as net) that has been wrapped around the slope 2 that has been weeded and cleaned with Cleaning Smell 1 from 30 to 150 cm from the slope shoulder 2a to the slope slope 2b, and attach it to the heads of anchors 4 and 5. 4a, 5
At step a, anchors 4 and 5 are driven in at appropriate intervals so as to press down on the silk knot 6. At this time, the driving angles of the anchors 4 and 5 are changed appropriately so that the net 3 is not pushed up by the growth of weeds, and the net 3 is brought into close contact with the slope 2. If the net 3 is fully stretched, the rainwater or volcanic ash layer will cause the drift soil on the net to apply an abnormal force to the crab rear anchors 4 and 5. Width (about 15 skins). In addition, since spraying work uses a large amount of chemical fertilizer, the metal is severely corroded, so anchors 4 and 5 should be made of rust-resistant materials, and net 310
0 hits 430 main anchors, 530 sub anchors
0 is used as the standard, but since slope 2 has many concavities and convexities, use support fan car 5 as necessary to bring net 3 into close contact with the slope.

Next, as the first layer, synthetic soil is made by mixing a protective covering material made of grass seeds and ground wood pulp, as well as fertilizer, coloring agent, and curing agent as appropriate, and adding moisture. Compressor (not shown)
Spray the net 8 evenly to an appropriate thickness from the upper end of the net 8 to the lower end of the net 8 and cover it from the top to the bottom through the nozzle as shown by the arrow in the figure. When the first X layer is fixed to the slope surface 2 and the net milk and the surface r of the synthetic soil is half-dry, as shown in Fig. The second layer is made of soil to cover the first layer, and the first layer is sprayed evenly from the top layer of Tomiso to the bottom layer of Hiroshi, but the material for the second layer is mainly for soil stabilization. Since it's there, it's only effective if you spray it on thickly.

Furthermore, if the area to be sprayed is large and the surface of the first layer dries and becomes sagging, water is applied to bring the surface to a dry state, and then a synthetic sandbag for fixing the second layer is sprayed. . In addition, when the slope is high, lean a ladder (not shown) against the slope to avoid stepping on the spray net, and "during strong dry periods, water is often directed toward the east or south, where it receives direct sunlight." Regarding the materials used in the present invention, Neff 3 must be made from fleas that are resistant to rust and are heavy, so Taremona net (synthetic fiber net), which satisfies these conditions and is inexpensive, was used. In addition, the ingredients of the synthetic soil army to be sprayed are 6 types: turf seeds, fertilizer, coating protection material, water, crowding agent, and coloring agent. Efficiency (germination x
Purity) is 80% as standard? Five types of ingredients with no less than 0% are combined and the amount is 252 per force. The fertilizer is Koujima's granular chemical fertilizer, which contains manganese to boron as the essential ingredients, and the particle size is less than 6. The fertilizer ingredients are 12% nitrogen and 18% phosphoric acid.
% also contains 14% potash. Next, the covering and protective material uses crushed large pulp to prevent the collapse of gutters, fertilizers, etc., and to retain water and heat. The curing agent is used as a water-resistant coating curing agent that improves the air permeability and water retention of the soil and ensures safe adhesion.The coloring agent is applied to the slope surface during construction. A green coloring agent is used to ensure uniformity of the contents and for aesthetic purposes.Furthermore, the ingredients of the synthetic soil g for fixing that is sprayed on the second layer are water, clay (artificial clay), and three types of park compost. ``Water is clean and does not contain pollutants, oil, acids, strong alkalis, salt, organic impurities, and other ingredients that are harmful to plant growth. Clay contains 87.4% silicic acid, 8% toalumina, and 3% iron. is the main ingredient and its particle size and proportion are -325 mesh 35.

6%, 120G mesh 2? .

Even with artificial clay made of 100 mesh, the clay liquid protects the area around the seeds and helps them germinate so that the seeds quickly settle in a safe place and germinate.

Park compost is made from fat bark compost produced from a chip factory in Aomori Prefecture, mixed with tankard and organic fertilizer, but since most of the slopes are cut, humus must be replenished. to be used for As mentioned above, the gist of the present invention is that ``Even if weeds on the slope are removed and cleaned, and the net is tightly attached to the slope using anchors, the net will not contain the seeds of the first layer of grass. This is a slope protection method in which a second layer of fixing synthetic resin, which is made of clay (artificial clay) and park fertilizer containing ice, is sprayed on the average when the soil is semi-dry. be.

Since the present invention is constructed as described above, first of all, the Honan Meso-so is to prevent fleas from growing on the ring, and the damage to the ring is caused by the fact that the mines of the Sunshine collapse all at once on the spring Isokagami. The cranes washed away the unstable lawn, causing extensive damage. Therefore, by covering the slope with netting, the lawn can be completely protected from this damage and the slope can be protected. In addition, in the method of the present invention, the third layer of synthetic soil for fixation is sprayed when the first layer of synthetic soil becomes semi-dry, so that the seeds mixed into the synthetic soil can be stably mixed with the synthetic soil for fixation. There is no chance that the top pole particles covered with soil will become cloudy.In other words, since the synthetic soil is in a semi-dry state, the synthetic soil for fixation will adhere well and the first layer of synthetic soil will not be destroyed. safe and protected.
Furthermore, since it uses clay and park compost as synthetic soil for establishment, it protects the seeds so that they can quickly settle in a safe place and germinate. There is no tank, so there is no organic fertilizer, but park compost plays the role of replenishing this humus soil, and also improves the soil agglomeration effect, air permeability, and water permeability, making it possible to grow vegetation on the slope. be.

Secondly, in areas where volcanic ash appears on the slope, the stability of seeds is extremely poor and the slope collapses due to wind, rainwater, etc., making it almost impossible for grass to take root.

Therefore, by using a net with as fine a mesh as possible (approximately 8 ribs) and covering the slope with it, the ± particles are completely trapped in the mesh of the net, resulting in stable germination. In addition, in weathered rock soil, which is said to be the worst condition for lawn vegetation, ``we cover the slope with a net to suppress fallen debris, help the seeds grow, and ensure that they take root completely.In addition, clay and park compost contain moisture. Since the second layer is synthetic soil for establishment, lawn seedlings can be established even in soils lacking humus.Next,
The dispersion of soil particles caused by heavy rainfall can lead to soil erosion, and the roots of recently established grass seedlings are washed by rainwater and exposed to sunlight.
The current situation is that many lawn seedlings that have germinated and grown to one or two plants are suffering from a lot of damage. The net acts as a cushion and is not directly hit by rainwater, and there is no chance of rain holes forming on the surface of the lacquer. Protect. The spraying method of spraying grass seeds on the slope to create vegetation has no effect on heavy rainfall, regardless of whether before or after the grass seeds germinate, as the grass seeds are exposed to the open air. There were cases where the seeds were washed away by the tail, resulting in poor vegetation from the middle to the top of the slope. By covering the entire slope with a net, seeds were completely eliminated from being washed away. The seeds germinated beautifully on average and the lawn seedlings grew well. obtain.

In addition, it can prevent lawn seeds from being washed away during heavy rainfall, and since 50% of rainwater from heavy rainfall is guided to the foot of the slope through the mesh, the more rainfall there is, the more rainwater can be prevented from penetrating.
It is possible to prevent the collapse of Hodoba. Therefore, the cost of rework and civil engineering work can be saved, which is highly effective. Furthermore, regarding the prevention of runoff due to erosion, erosion can occur on the surface, in small streams,
There are three types of pores, but it is ideal to prevent them at the stage of surface erosion.

Therefore, if the surface of the slope is covered with a net, the number of people running away from the slope can be minimized to 0.
can be stopped and surface erosion can be prevented.
It should be noted that lawns on slopes are not maintained at all, except in certain cases. ``Therefore, the growth gradually deteriorates from about three years after transplanting, and this is due to a lack of fertilizer, but the organic fertilizer is returned by itself. Since this is the 5 ideal, in order to help the self-reduction, the mesh of the net is made as small as possible, and the aim is to press down the dead old grass stems from the roots as much as possible, speed up the septic tank, and eventually turn them into fertilizer. It is said that

[Brief explanation of drawings]

0 Figure 2 is a perspective view of removing weeds from the slope, Figure 2 is an enlarged cross-sectional view along line A, Figure 3 is a perspective view of a net stretched over the slope, Figure 4 is B - An enlarged cross-sectional view along line B "Figure 5 is a perspective view showing the first layer of synthetic soil being sprayed from above the net, Figure 6 5 is an enlarged cross-sectional view along line C-C. Figure 7 is an enlarged cross-sectional view along line C-C. After the first layer has been sprayed, the second layer is being sprayed. Figure 8 is an enlarged sectional view taken along the line D-D, and Figure 9 is a partially cutaway enlarged view showing the state where the net is stretched on the slope. In the figure, t3 is a synthetic fiber net, turtle, 5 is an anchor, 6 is a knotted silk thread, y is a synthetic soil, and 9 is a synthetic soil for settlement. pith fin 4 diagrams ○5 blind diagrams 7 koji ba evil leopard ○ mouse

Claims (1)

[Claims] 1. Remove weeds from the slope, clean it, attach a heavy synthetic fiber net with a fine mesh of approximately 8 mm square to the slope using anchors so as to press down on the knots of the net, and sprinkle grass seeds on top of it. A synthetic soil containing fertilizer, curing agent, and coloring agent as well as moisture is sprayed evenly over it as a first layer, and in a semi-dry state, clay (artificial clay) and bark compost are added on top of it in a semi-dry state. A slope protection method in which a second layer of synthetic soil containing water is sprayed evenly.