JPH0723614B2 - Method of forming vegetation base in slope greening work - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention is applicable to slope revegetation construction for protecting and protecting artificial slopes such as bare land and rocks of inorganic recessive soil. The present invention relates to a method of forming a vegetation base that is carried out in advance.

[Conventional technology]

The applicant of the present invention, as a greening base material for forming a vegetation substrate,
In addition to fertilizer, konjak fly powder is mixed as an adhesive material,
A method of spraying slurry mixed with water on the slope was provided (Japanese Patent Publication No. 54-1364 and Japanese Patent Publication No. 60-4692).
(See publication 3).

As the above-mentioned greening base material, mountain sand or black soil is used, and a fertilizer, an adhesive material and the like are mixed therein. Mountain sand that contains pumice stone that can be procured relatively easily at the construction site is used. As the fertilizer, lime or chemical fertilizer (granular / solid advanced chemical fertilizer) is used. Konjac fly powder mixed as an adhesive also serves as a slow-acting fertilizer.

In the actual construction, in addition to the above materials, peat moss and its analogues are mixed as a soil conditioner.

[Problems to be Solved by the Invention]

However, since the above-mentioned peat moss and its analogues are imported products, the cost is high. Therefore, a substitute material for this has been sought, but there is no suitable one at present.

An object of the present invention is to solve the above-mentioned problems relating to soil improvement when forming a vegetation base in conventional slope greening work.

[Means for Solving the Problems]

Therefore, in order to solve the above-mentioned problems and to achieve the object of the invention, the present invention relates to a method of forming a vegetation base in a slope greening work as a first means, in which a collapse slope and a cut slope are taken. In sloped wastewater treatment works to prevent washout due to etc., organic sewage sludge or domestic waste or industrial waste is put into a fermentation machine, and after adding a porous water-conditioning material and a fermentation bacterium, Secondary fermenting is performed by the fermentation machine to make compost, and the compost is sprayed with a mortar spraying machine while mixing water at the time of its nozzle spraying on the wastewater treatment method surface and drainage groove surface to a predetermined thickness and vegetation. A base is formed, and a net body including seeds and a seed curing material is stretched around the surface of the vegetation base and fixed by an anchor.

Further, another means of the present invention relates to a method for forming a vegetation base in a slope greening work, in order to enhance water retention of the greening base and to secure safety, in a log felling work using thinned wood, organic sewage is used. Put sludge or domestic waste or industrial waste into a fermentation machine, add porous moisture control material and fermentation bacteria to it, make secondary ferment by the fermentation machine to make compost, and mortar the compost Using a spraying machine to form a vegetation base by spraying to a predetermined thickness on the slope between adjacent logs of a log felling work while mixing water at the time of jetting the vegetation base, on the surface of the vegetation base, seeds and A net body provided with a curing material for seeds is stretched around and fixed with an anchor, and a sapling is planted directly above the log in the log felling work.

[Operation] The operation based on the above means will be described. First, the first aspect of the present invention
In the means, the organic sewage sludge or domestic waste or industrial waste is put into a fermentation machine, and after adding a porous moisture control material and a fermentation bacterium to the fermentation machine, the second fermentation is carried out by the fermentation machine. Using the mortar spraying machine, the compost produced in this way is sprayed on the slope in the slope drainage treatment work or the slope between the adjacent logs in the log felling work to form a vegetation base with a predetermined thickness. In this case, the vegetation base material is
Since it has an appropriate viscosity by itself, when water is added and sprayed and then dried, it has the action of hardening without adding an adhesive material separately. At the same time, it also functions as a fermenting compost.

Further, in another means of the present invention, a net body having seeds and a seed curing material facing downward is stretched around the surface of the vegetation base formed by the first means and fixed with an anchor. In addition, plant seedlings directly above the logs to ensure seed germination and root survival.

〔Example〕

Next, examples of the method of the present invention will be described. Fig. 1 is a schematic diagram showing a construction example of slope greening work, Figs. 2 to 4 show wastewater treatment works, Fig. 2 is a front view, and Fig. 3 is a line 3-3 in Fig. 2. 4 is an enlarged sectional view taken along line 4-4 of FIG. 2, FIGS. 5 to 7 show a log bend operation, FIG. 5 is a front view, and FIG. 6 is a fifth section. Fig. 6 is an enlarged cross-sectional view taken along line 6-6, Fig. 7 is an enlarged cross-sectional view of portion a of Fig. 5, and Fig. 8 is a perspective view of a part of the greening net body stretched on the surface of the vegetation base. .

First, the vegetation base is essential for soil improvement,
The "soil" is considered as follows. That is,
It contains not only fine-grained rocks but also organic components, and also soil animals and bacteria, which decompose the bodies of animals and plants to produce inorganic fertilizer components necessary for the growth of plants. Must have the ability to create. For that purpose, the vegetation base material, which is closer to natural soil by mixing organic components and bacteria that are decomposers of the ecosystem into the existing soil base material, shortens the transition period of the ecosystem. Let
It seems to be more useful because the artificial base material will quickly integrate into the natural ecosystem.

Of the materials that serve as vegetation bases for soil improvement as described above, sewage sludge is mainly sludge and other raw mud produced from public sewers, and domestic waste is vegetables and fish from ordinary households. Cooking wastes such as etc. and other raw garbage, and industrial wastes are large amounts of fish and meat ara,
Such as food processing residue. And the various wastes mentioned above
Using ceramics as a carrier, a considerable amount of fermenting bacteria is added and heated, and the mixture is fed and stirred while maintaining a constant temperature. As a result, the vegetation base material functions as fermented compost.

In addition, the porous moisture conditioner is used to reduce the water content of sewage sludge having a high water content among organic wastes. Specifically, pumice is crushed. Baking products such as granular materials, ceramics and perlite are used.

Fermentation bacteria can create a situation in which microorganisms are most likely to play an active part if certain conditions, that is, water, temperature, and oxygen are satisfied. For example, first adjust the water content to 55% -60% and dehydrate it, and keep the temperature at 55-65 ° C. And when mixed with organic waste under the above conditions, it rapidly grows while decomposing and vaporizing water and fats and oils,
Moreover, it has the property of causing a fermentation phenomenon.

Then, oxygen is supplied continuously by agitating at regular intervals.

(I) “Example of vegetation base material manufacturing process” About 1 ton of sludge with a water content of 80 to 85% is produced from 2,000 ton of public sewage.

Therefore, as shown in FIG. 1, fermentation bacterium 11 and porous moisture control material 12 are added to organic waste such as organic sewage sludge, domestic waste, and industrial waste by a belt conveyor 14 or a shovel or the like. And stir. After 8 to 100 hours depending on the amount of the above-mentioned input material, the sludge is secondarily fermented and the water content is reduced to 50%. Change to compost material.

A fully automatic treatment device for performing the above fermentation treatment has been developed and put into practical use, and a large amount of waste can be treated in a short time, and the volume of waste can be reduced to 20 to 10%.

(II) “Example of construction of vegetation base” Next, an example of construction of the vegetation base according to the present invention will be described. First,
The ratio of required area and material for spraying area and thickness for forming vegetation base is as follows.

・ Spraying area 100m ²・ Spraying thickness 5cm ・ Vegetable substrate material (compost) 9m ³・ Water 1500 to 2100 In the above construction work, first remove the floating stones and wood chips on the slope 1.

The above-mentioned vegetation base 2 is formed when the vegetation base material 10 is put into the mortar spraying machine 15 and stirred and mixed, and then compressed air from the compressor 16 and pressurized water from the power sprayer 17 are sent by the spray nozzle 18. The vegetation base 2 is formed by spraying the slope 1 with a predetermined thickness while adding and mixing water to the slope.

Then, by the injection nozzle 18 at the tip of the hose connected to the spraying machine 15, the slope 1 of the wastewater treatment work shown in FIGS. 2 to 4 or the interval H between adjacent logs in the log felling work shown in FIGS. Specified thickness on each slope 1 in the interval (5 cm in the example shown)
Spray on.

In addition, when performing a greening net work in which a net with seeds is stretched on the surface of the vegetation base 2, it is as follows.

(III) · net body "construction cases of greening net Engineering" (with curing material) 120m ² (forest conservation for 12mm × 12mm, 20mm × 25mm) ( for general use 12mm × 12mm, 20mm × 25mm) · species 1.0kg (Kentucky - 31-Fescue, cleanping red fescue, others) ・ Anchor (main) 15 pieces ・ Auxiliary anchor (mesh skewer) 300 pieces When constructing the above-mentioned greening net work, as shown in FIG. The curing material 4 made of coarse fiber is laid, and the seeds 5 are entwined so as not to fall off. The net body is closely attached to the surface of the curing base 2 with the curing material and the seeds facing downward. Set up. Then, in the wastewater treatment work, the seedlings 9 are put on the vegetation base 2 in the vicinity along the drainage groove 6 having the vertical space S or the horizontal space S ₁ and the anchor 8 in the log felling work. Seedlings 9 are planted on the vegetation base 2 immediately above the log 7 fixed in step 2.

〔The invention's effect〕

Since the present invention has the above-mentioned configuration, in the method for forming a vegetation base in slope greening work, organic sewage sludge and other organic sludge instead of using sand and coating fertilizer is conventionally used to form the base material. With respect to the waste, a porous moisture control material having air permeability and sufficient oxygen supply and fermenting bacteria are added to secondary fermentation to make compost, and water is added to this while mixing. By spraying the slope so that the base material has a predetermined thickness, the sand and coating fertilizer, which were always required in the past, can be eliminated. Furthermore, the above-mentioned vegetation base material is a sewage sludge or domestic waste or industrial waste mixed with a fermenting bacterium, and further added with a water conditioner,
If sprayed with water by a nozzle jet, the vegetation base itself will have a natural and appropriate viscosity, so chemical adhesives such as polyvinyl acetate and asphalt emulsions, which have been used conventionally, or the above-mentioned chemical adhesives can be used instead. The use of pure vegetable adhesive such as konjak flying powder is also unnecessary, which has the effect of reducing the cost of slope greening work.

In addition, it usually takes 2 years or more to naturally ferment organic living waste / industrial waste, but as in the present invention, a porous water conditioner and a fermenting bacterium are added to the above-mentioned waste in the fermentation machine. By fermenting, compost with a uniform water content can be obtained.

Furthermore, since the microorganisms in the soil necessary for greening are used in large quantities at the fermentation stage, the compost produced contains many microorganisms. Therefore, the quality is almost the same as the natural soil.

In addition, since public sewage is used as the main raw material for the formation of the above-mentioned compost, if, for example, the annual sand consumption of slope planting works is 9000 m ³ , the sewage sludge will generate 9000
The compost m ^3, in order to get 1 m ³ of (700 kg) was secondary fermentation is reduced to 0.25m ³ (200kg).

And the amount of raw sludge used per day is 9000 m ³ ÷ 12 months ÷ 25 days = 30 m ³ .

From the above calculation, 1m ³ × 30 ÷ 0.25m ³ = 120m ³ (86.4 tons) is expected to produce 30m ³ compost per day.

2000 tons of public sewage produces 1 ton of raw sludge, and 2000 tons of sewage is about 625 people (320 per person).
/ 1 day) sewage discharge.

So, to produce 30m ³ of compost per day, 120m
³ (86.4 tons) of raw sludge is required.

This amount requires 172,800 tons of sewage, which is equivalent to sewage treatment for about 540,000 people.

As can be seen from this result, it is clear that almost all the publicly-owned sewage waste can be effectively used for the formation of vegetation bases in slope revegetation work. It is useful as a method for forming a vegetation base in this kind of slope greening work because it can be useful for removing the waste that leads to the above, and the waste that has been treated can be digested without waste.

Also, in the case where the net body is stretched on the vegetation base,
The roots are firmly rooted on the base and covered with a protective material until germination to prevent runoff from rainwater. In addition, seedlings and plants planted on the vegetation base in the vicinity of the drainage ditch in the wastewater treatment works or on the logs directly above the logs in the log felling work or on the vegetation base in other positions are separated according to the fertilizer nutrients of the vegetation base. It has the effect of supporting the promotion of growth without applying special fertilizer.

[Brief description of drawings]

FIG. 1 shows an embodiment of the method of the present invention. FIG. 1 is a schematic view showing a construction example of slope greening work, FIGS. 2 to 4 show wastewater treatment works, and FIG. 2 is a front view. FIG. 3 is 3-3 of FIG.
5 is an enlarged cross-sectional view taken along line 4-4 of FIG. 2, and FIGS.
The figure is a front view, FIG. 6 is an enlarged sectional view taken along line 6-6 of FIG. 5, FIG. 7 is an enlarged sectional view of part a of FIG. 5, and FIG. 8 is stretched on the surface of a vegetation base. It is a perspective view of a part of greening net body. 1 ... Slope 2 ... Vegetation base 3 ... Net body 4 ... Curing material 5 ... Seed 6 ... Drainage groove 7 ... Log 8 ... Anchor 9 ... Sapling

Claims (2)

[Claims] 1. A sloped wastewater treatment facility for preventing the collapse slope and the cut slope from being washed away by water, etc., in which organic sewage sludge or domestic waste or industrial waste is put into a fermentation machine, and then perforated. After adding quality moisture regulator and fermentation bacterium,
Secondary fermenting is performed by the fermentation machine to make compost, and the compost is sprayed with a mortar spraying machine while mixing water at the time of its nozzle spraying on the wastewater treatment method surface and drainage groove surface to a predetermined thickness and vegetation. A method for forming a vegetation base in a slope greening construction, comprising forming a base, laying a net body comprising seeds and a seed curing material on the surface of the vegetation base, and fixing the net with an anchor. 2. An organic sewage sludge or domestic waste or industrial waste is put into a fermentation machine in a log felling process using thinned wood to enhance water retention of a greening base and to ensure safety. After adding the water content adjusting material and the fermentation bacterium, the second fermentation is performed by the fermentation machine to make compost,
Using a mortar spraying machine, the compost is sprayed to a predetermined thickness on the slope between the adjacent logs of the log felling machine while mixing water at the time of spraying the nozzle to form a vegetation base, and the surface of the vegetation base. Forming a vegetation base in the slope reforestation work, which is characterized in that a net body provided with seeds and a curing material for seeds is stretched around and fixed with an anchor, and a seedling is planted immediately above the log in the log felling work. Method.