JPH0437689B2 - - Google Patents

Description

[Detailed Description of the Invention] A. Purpose of the Invention [Field of Industrial Application] The present invention relates to a slope greening method for reinforcing and beautifying cut slopes on roads, railways, dams, residential areas, etc., particularly by seed spraying. It relates to artificial soil base materials used when implementing greening.

[Conventional technology]

The seed spraying method for greening slopes involves the use of seeds and
A method in which a slurry mixture made by adding water to a spraying material such as fertilizer or soil is sprayed onto the slope using a spraying machine, or a method in which seeds, fertilizers, various fiber materials, etc. are dispersed in water. A method of spraying on the slope using a pump has been implemented.

The above seed spraying method is similar to other slope greening methods,
For example, it has better construction efficiency compared to vegetation drilling, vegetation reinforcing, vegetation boarding, vegetation bagging, vegetation pine construction, tension turf construction, striped turf construction, etc., and is also suitable for use on steep slopes, poor ground, and hard slopes. Suitable for greening.

However, it requires a large amount of water at the construction site, and the sprayed material dries easily, resulting in poor germination rates, germinated buds dying, and the soil surface becoming susceptible to erosion by wind and rain. The dot was hot.

Therefore, in order to improve the above-mentioned problems, the soil surface after spraying is covered with pine, rather, or a sheet, and the spraying material is coated with peat moss, which has good water retention.
Methods of mixing organic vegetation materials such as berg compost, inorganic vegetation materials such as vermiculite and perlite, or secondary spraying of the above-mentioned fibrous or porous materials have been adopted, but the construction efficiency is low. It can get worse, it can be expensive, and it can't be as effective.

Recently, a synthetic resin-based water retention agent has been developed that has the property of absorbing a large amount of water, tens to hundreds of times its own weight, and retaining that water absorption state. It is being mixed into artificial soil containing

[Problem that the invention seeks to solve]

However, since the above-mentioned water retention agent is a powder of fine particles when it is not absorbing water, if it is mixed into artificial soil as it is, it will be difficult to mix uniformly because the mixing ratio is small.

b When spraying, the sprayed material becomes consolidated, making it difficult for the water retention agent to absorb water.

c. Therefore, in order to fully exhibit the water absorbing effect of the water absorbing agent in the water retaining agent, additional water sprinkling is required after spraying, which requires time and effort.

d After spraying, the artificial soil gradually becomes compacted and the pores in the soil decrease, so the water retention agent does not easily absorb water even if water is sprinkled or there is rainfall.

There are other problems.

An object of the present invention is to provide an artificial soil base material that solves the problems in the seed spraying method using the above-mentioned synthetic resin water retention agent.

B. Structure of the invention [Means for solving the problem] Artificial soil in which a synthetic resin water retention agent that absorbs and retains water in advance is mixed into natural soil, organic vegetation materials, inorganic vegetation materials, fertilizers, soil conditioners, etc. Features a base material.

[Effect]

The above-mentioned artificial soil base material of the present invention is supplied in a bag that does not allow water to pass through, such as a vinyl chloride film bag. Then, separately prepared natural soil, bark compost, chemical fertilizers, seeds, etc. are mixed according to the properties of the ground, climate conditions, and required greening conditions, mixed with water, and then sprayed with a spraying machine. wear.

〔Example〕

The organic vegetation materials in the artificial soil base material of the present invention include bark compost, peat moss, etc., and the inorganic vegetation materials include perlite, vermiculite, etc.
Fertilizers and soil conditioners are commonly used, and synthetic resin water retention agents are commercially available products.

The above-mentioned water-retaining agent is made to absorb in advance about half of its saturated state, for example, about 300 times its own weight of water. The water absorption rate can be adjusted by the time the water retaining agent is soaked in water.

B. Effects of the invention The artificial soil base material of the present invention is made by mixing natural soil, organic vegetation materials, inorganic vegetation materials, fertilizers, soil conditioners, etc. with a synthetic resin water retention agent that has previously absorbed and retained water. Therefore, the water absorbent water retention agent is already well mixed with other soil materials, etc., and when kneaded with the spray material containing seeds at the construction site, it blends well and uniformly with the spray material, and further absorbs water.

Therefore, the moisture content of the artificial ground containing the seeds formed on the slope surface by spraying is high and can sufficiently cover the moisture necessary for germination, eliminating the need for watering after spraying and reducing the time and effort of construction. It can be omitted.

During spraying, the synthetic resin water retaining agent mixed in the spraying material absorbs and retains enough water and gels as described above, so it does not collapse under the spraying pressure, not only at the beginning of the spraying process but also afterward. It also prevents the soil from hardening and leaves adequate voids in the soil.

As a result, the soil has excellent aeration and oxygen is supplied into the soil, which promotes the development of root threads and produces strong and vigorous root threads.

In addition, the above-mentioned gel-like synthetic resin water retention agent mixed in the soil on the slope of the finished ivy supplies water with the fertilizer components that dissolve during rainfall, and prevents the fertilizer components from being washed away. Enough water and fertilizer components can be taken from the water retention agent.

The above-mentioned gel-like synthetic resin water retention agent also maintains the elasticity of the soil moderately and uniformly over a long period of time, making it suitable for germination, and maintaining the hardness of the soil by allowing roots to spread sufficiently after germination. Therefore, overall elasticity is not lost. And because the water is evenly distributed in the soil by the water retention agent, there is no frost heaving during the cold season.

Furthermore, although the gel-like synthetic resin water retention agent in the soil has almost no stickiness, organic vegetation materials such as bark compost and pea moss in the artificial soil base material have the property of becoming sticky when they contain water. Moreover, since these materials are fibrous, they intertwine and use their cohesive strength to maintain the stability of the soil surface before plant roots take root.

Sliding and collapse of topsoil at the initial stage of spraying is often caused by rainfall where the soil has become dry and sticky, but if the artificial soil base material of the present invention is used, this can be prevented. As mentioned above, the synthetic resin water-retaining agent inside absorbs and retains water sufficiently from the beginning of spraying, so it provides moisture to the organic vegetation material and maintains the above-mentioned stickiness, allowing the root threads to develop quickly. There is also no risk of the topsoil sliding or collapsing.

Claims (1)

[Claims] 1. Artificial soil used in the seed spraying slope greening method, which is characterized by mixing natural soil, organic vegetation materials, inorganic vegetation materials, fertilizers, soil conditioners, etc. with a synthetic resin water retention agent that absorbs and retains water in advance. Base material.