JPH0627406B2 - Slope greening method and green linen cloth for the method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention is intended to protect the slopes of soil and rock artificially constructed by civil engineering work, or bare ground that has collapsed due to water damage, etc. by natural planting. The present invention relates to a slope greening method to be provided and a greening linen cloth for the method.

[Conventional technology]

First, the inventor and the applicant of the present application provided inventions of a slope greening method and a greening net for the method in Japanese Patent Application Laid-Open No. 59-91229 (Japanese Patent Application No. 57-200937).

One of the above-mentioned inventions is a first step of forming a vegetation base by spraying mountain sand, konjak dust and coating fertilizer in advance and spraying them on the ground surface while mixing with water, and one side of the net body. A second step of attaching dried grass or palm fibers with a vegetable paste to form a plant layer having a substantially uniform thickness, and spraying and attaching 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 seed / plant layer is located inside the net body and is in contact with the vegetation base.

Still another invention is that one side of a net body is dried grass or palm fibers are attached with a vegetable paste to form a plant layer having a substantially uniform thickness, and seeds are sprinkled and attached to the plant layer. is there.

However, in the above invention, the mesh of the net is 1.2 × 1.2 (cm)
Since it is a relatively large grid, if the fibers of finely cut grass or palm are directly sprayed and attached to them, they often do not stick to the net during the spraying process and spill out. The adhesive area of the plant layer is relatively small due to the relatively small adhesion area using the fiber cords that form the ropes. Also, when the plant layer is stretched and fixed on the slope, the plant layer is relatively coarse, so that it can be used for heavy rainfall. At the expense of seeds, there was a risk that the seeds would be washed away and the soil would be scoured due to rainfall through the plant layer.

Then, the inventor and the applicant of the present application further provided an improvement of the first invention in Japanese Patent Application Laid-Open No. 60-47122 (Japanese Patent Application No. 58-154637) as a second invention. One of the inventions is the same first step as that of the above invention, in which a net body is overlaid with a myriad of small perforated paper bodies having an adhesive surface on the inner surface thereof, and the adhesive surface of the paper body is covered with dried grass or palm. A second step of forming a plant layer having a substantially uniform thickness by attaching fibers and spraying and attaching seeds to the plant layer to form a greening net, the second step on the vegetation base of the first step The greening net of (1) is stretched and fixed so that the seed / plant layer is located on the inner surface of the net body and is in contact with the vegetation base.

Another aspect of the present invention is to stack one side of a net body with countless small-perforated paper bodies having an adhesive surface on the inner surface, and attach dry grass or palm fiber to the adhesive surface of the paper body with a vegetable paste. Then, a plant layer having a substantially uniform thickness is formed, and seeds are sprayed and adhered to the plant layer.

As a result, the seeds can be prevented from being exposed to the direct sun and rain wind by the paper body as compared with the above-described conventional invention, so that the mortality due to the drying and the drying damage at the early stage of the growth can be prevented, and the washout due to the scour can be prevented. In addition, since about half of the paper body is occupied by innumerable small holes, it has an effect of appropriately absorbing sunlight nutrients.

Thirdly, as another technique, in Japanese Utility Model Publication No. 55-47955, palm natural fibers, shiyu fibers, sisal fibers, hop vein fibers, and other rigid natural fibers are interlaced so that the fibers are mutually Area density about 0.
A sheet-like fibrous body having a coarse mesh of 01 to 0.1 g / cm ² ,
Also provided is a device for a surface soil stabilizing net, which comprises a plurality of fixing strings fixed to one surface of the fibrous body and arranged in parallel in at least one direction, and wherein the intervals between the adjacent fixing strings are 10 cm or more. Has been done.

[Problems to be solved by the invention]

However, the second aspect provided as an improvement of the first aspect described above.
Even in the invention, there are still some problems. That is, since the paper body with holes to be superposed on the net body has almost no shrinkability, it is unsuitable for the surface of the ground. If the paper thickness is thin, so-called stiffness is weak and the paper is easily damaged, which causes trouble in construction. Further, if the paper thickness is made thicker, it becomes stronger, but instead, when it is stretched over the slope, the familiarity becomes even worse.

In addition, since the paper body lacks water retention, even if there is rainfall in the dry season, it tends to fall into water deficiency as soon as the weather continues.

In the third prior art as well, since a coarse mesh fiber is formed into a sheet shape, when it is stretched on the slope, if strong rain or the like is dealt with, the seeds of the seed will be treated as in the first invention. There is a risk that the soil will be washed away and the earth and sand will be washed away.

[Means for solving problems]

Therefore, an object of the present invention is to solve the problems of the conventional technique and to obtain the slope greening more effectively by utilizing the above-mentioned conventional related technique and adding a new technique.

In order to achieve the object, one of the present invention is to use a slope revegetation method in which mountain sand, konjak dust and coating fertilizer are pre-stirred and sprayed on the ground surface while mixing this with water. In the first step of forming a hay, a net body is superposed on the outer surface of the linen cloth, and the dead grass finely cut is formed on the inner surface of the linen cloth so as to have a substantially uniform thickness. And a second step of spraying and attaching seeds to the dead grass layer to form a greened linen cloth body. The greened linen cloth body of the second step is formed on the vegetation base of the first step, and the seed / dead grass layer is used as a vegetation base. It is stretched and fixed so that it contacts.

Further, another aspect of the present invention is a greening linen cloth for a slope greening method, in which a net is laid on the outer surface of the linen cloth and the plant is cut into fine pieces on the inner surface of the linen cloth to have a substantially uniform thickness. A dry grass layer adhered with a sex paste is formed, and seeds are sprayed and adhered to the dry grass layer.

〔Example〕

 Next, examples of the present invention will be described.

(1) Construction of vegetation base (first step) Construction of the vegetation base in the first step of the present invention is performed by the first step of the technical means in the patented invention of Japanese Patent No. 1322986 owned by the applicant of the present application. That is, a vegetation base 2 is provided by spraying a slurry formed by mixing mountain sand containing pumice, fertilizer, konjak dust, and water to a slope 1 with a thick thickness t of about 10 cm.

As the mountain sand of the vegetation base 2, it is desirable to use good quality loam such as black soil, which is naturally rich in organic matter. However, in reality, it is difficult to procure a large amount of good quality loam because construction sites are often under severe conditions such as in remote areas.

Therefore, mountain sand containing pumice, which has been shunned due to its low nutrient content, is used, and the same material as in the first step is mixed with this to make it similar to effective loam.

In addition, the konjak fly powder is a powder that scatters from the stone mill when konjac flour is refined from konjac potato and is not suitable as a refined powder.
Has a water content of 13.64, a crude protein of 14.30, a crude fat of 0.48, an ash of 8.26, a fiber of 5.13, and a soluble nitrogen-free substance of 58.19, and contains nutrients suitable for plant growth.

In addition, coating fertilizers require 100% days to elute 80% of the nitrogen nutrients when the soil temperature is 25 ° C.
100 days, 180 days, 360 days, 70 within the range of 700 days
The slow-acting fertilizer set on day 0 shall be used in an appropriate combination. Specifically, a commercially available high control (= brand name,
Asahi Kasei Co., Ltd. is suitable.

(2) Production of greened linen body (second step) In producing the greened linen body 3, a synthetic resin fiber net 5 is laid on the outer surface of the fabric 4 woven of natural linen fiber, and further the linen fabric 4 is formed. While spraying finely cut hay on the inner surface, a sizing agent is sprayed onto the hay to form a dead grass layer 6 with a substantially uniform thickness, and seeds 7 are sprayed and adhered to the dead grass layer.

As the linen cloth 4, as shown in FIG. 3, a coarse cloth knitted with hemp fibers is used. Specifically, the maximum size per sheet is set to a width of 2 m and a length of about 10 m.

The net 5, which is superposed on the outer surface of the linen cloth, has a mesh of 1.
It is made of synthetic resin fiber such as polyethylene, nylon, etc., which is about 2 cm x 1.2 cm, and its width and length are set to the dimensions suitable for the linen cloth.

For the dead grass layer 6 attached to the inner surface of the linen cloth 4, forage grass or other dead grass or coconut fiber for feed, which has been finely cut into an appropriate length and dried, is used, but the coconut fiber is becoming difficult to obtain. However, because the cost is high, weeds and weeds that can be procured domestically are sufficient.

Incidentally, an example of manufacturing the greened linen body 3 will be explained with reference to the motor m.
On a belt (made of wire mesh) conveyor 11 driven by, from the base end side in the traveling direction, hopper 13, charging chamber 14, fan 15,
Paste spray device 16, fertilizer and seed dispersal layer 17, compression roller
18 is provided.

Then, the net body 5 is placed from the base end side of the conveyor 11 and gradually fed out in the traveling direction, and the linen fabric 4 is fed out in synchronization with the net body 5 so as to overlap with the upper surface of the linen fabric.
When dead grass cut into an appropriate length by the cutting tank 12 is put in the hopper 13, an electric stirring and feeding mechanism (not shown) provided in the hopper causes the charging chamber 14
Then, the dead grass layer 6 is formed by a fan 15 or the like so that the dead grass has a substantially average thickness.

On the other hand, in front of the charging chamber 14, the vegetative pasting agent is previously applied to the dead grass by the pasting agent spraying device 16 and attached to the linen cloth 4. Then
The seed / fertilizer spray layer 17 sprays and attaches the seeds 7 on the dead grass layer 6 together with the fertilizer, and then the compression roller 18 applies the dead grass layer 6 to the dead grass layer 6.
Is compressed to a uniform thickness of 0.5 to 1.0 cm. The seeds 7 sprayed on the dead grass layer 6 mostly enter the surface or the inside of the dead grass layer 6 while the linen cloth 4, the net 5 and the dead grass layer 6 are proceeding by the conveyor 11, or until the linen cloth 4 is reached. Reach and attach.

[Construction example]

As a construction example of the present invention, for example, the composition of a spray layer having a thickness of 10 cm and a spray area of 100 m ² is as follows.

(1) Vegetation base (1st step) Mountain sand (mountain sand containing pumice) 20m ³ Fertilizer (granular solid, advanced chemical formation) 20kg Coated fertilizer (slow-release fertilizer = brand name: High Control 180, 700, etc.) 15kg Fei powder konjac 255kg water 2000-2500 (2) Green linen body (second step) linen fabric (woven coarse) 120 m ³ net member (mesh 1.2 cm × 1.2 cm) 120 m ³ dry grass layer (fodder dry grass) 50 100m ³ Vegetable paste (Udon powders) 5kg Seeds (Kentucky 31 fescue, clean purging) 2kg Anchor (main) 15 Anchors (skewers) 300 Next, the construction procedure for slope greening work according to the present invention will be explained. .

First, the slopes, wood chips, etc. on the slope to be constructed are removed, and a known spraying machine for spraying mortar is preliminarily lightweight, and the sand, konjak flying powder, and coating fertilizer that have been stirred without mixing water are added. Then, this is sent to the nozzle by the wind pressure of the compressor, and while spraying water at the time of jetting the nozzle, it is sprayed onto the ground surface ₁₁ by the spraying nozzle through the spraying machine and the compressor, and the set thickness t is set in the range of 1.0 to 10 cm. To form a vegetation base 2.

In this case, the hardness of the vegetation base 2 is a soil hardness tester (Yamanaka type)
When the hardness exceeds 27, the invasion development of seed roots deteriorates.On the other hand, when the hardness is lower than 23, the root system develops better, but the sprayed layer does not solidify and is washed away, and the predetermined base thickness is I can't get it. Therefore, the soil hardness is set to about 23 so that the root system is well developed and the base 2 is appropriately solidified and spray-fixed to a predetermined thickness.

Then, when the surface water of the vegetation base 2 is sprayed and solidified by the spraying in the first step, the seeds 7 and dead grass layer 6 attached to the back surface of the linen cloth 4 having the net 5 on the outer surface are the vegetation base 2 The linen body 3 in the second step which is brought into contact with the vegetation is stretched on the vegetation base 2, and the edges of adjacent greening linen bodies are overlapped with each other, and the anchor 8 is driven and fixed at that portion and other places.

〔The invention's effect〕

Since the present invention has the above-mentioned constitution, by covering the seed and the dead grass layer in contact with the vegetation base with a linen cloth made of coarsely woven linen fiber cloth, as compared with the conventionally known covering with a perforated paper body. It excels in water retention and heat retention, eliminates drying damage such as mortality in the early stages of growth, and can effectively prevent scouring of earth and sand due to rainfall and the like.

And since the material of the linen cloth is hemp fiber, it is flexible and has a very small shrinkage rate, so it fits well into the ground,
Moreover, since it is much tougher than a paper body, there is no damage and the construction work is easy.

In addition, the green linen cloth linen cloth seems to have less germination space compared to the small holes for germination of the paper body, but since the knitted weave is extremely coarse, it is possible to germinate without bending from virtually anywhere. Has the same effect as having small holes all over the linen cloth. As a result, it is possible to absorb a moderate amount of nutrients while blocking direct sunlight, so that germination and rooting are promoted.

In addition, the vegetation base is 100 to 700 days by mixing konjak fly powder and coated fertilizer with mountain sand that has no nutrients but is easily procured and has high water permeability and air permeability.
A slow-acting vegetation base with nutrients dissolved over a long period of time is obtained.

Konjac powder is also used as an adhesive, but it contains 37.9% nitrogen, so 12.5% of the beating turns into fertilizer after 30 days at a soil temperature of 25 ° C. , Further promote germination growth of seeds.

Then, the greened linen cloth stretched over the vegetation base has nets laid on the outer surface of the linen cloth, and the plant layer and seeds are sprayed and adhered to the inner surface. It invades and develops, and eventually roots in the ground and grows.

Since the dead grass layer on the linen body side is hay such as dried dry grass in advance, it will start to corrode in about one month when it contains water due to rain after construction, which will turn into organic fertilizer and promote germination growth of seeds. effective.

In addition, the net on the outer surface of the linen fabric is made of synthetic resin fiber, and since the linen fabric that is well-adapted to the ground suppresses the rise and protrusion of the dead grass layer, the mesh can be made relatively large, It is possible to eliminate the trouble of germination.

[Brief description of drawings]

The drawings show an embodiment of the slope greening method and the greening linen cloth body for the construction method according to the present invention. FIG. 1 is a schematic front view, and FIG.
The drawing is an enlarged cross-sectional view taken along line 2-2 of FIG. 1, FIG. 3 is a perspective view of a greening linen body, and FIG. 4 is an explanatory view showing a manufacturing process of the greening linen body. 1 …… Solid ground 2 …… Vegetation base 3 …… Greening linen cloth 4 …… Azabu 5 …… Net 6 …… Withered grass layer 7 …… Seed 8 …… Anchor

Claims (2)

[Claims] 1. A first step of forming a vegetation base by mixing mountain sand, konjak dust and coating fertilizer in advance, and spraying the mixture with water to form a vegetation base, and a net body on the outer surface of the linen cloth. And hay are cut into fine pieces on the inner surface of the linen cloth to form a dead grass layer adhered with a vegetable paste so as to have a substantially uniform thickness, and seeds are sprinkled and adhered to the dead grass layer to form a greened linen body. And a second step of forming
A slope revegetation method characterized in that the vegetative linen cloth of the second step is stretched and fixed on the vegetation board of the first step so that the seed and dead grass layers contact the vegetation board. 2. A net is laid on the outer surface of the linen cloth, and the inner surface of the linen cloth is finely cut to form a dead grass layer adhered with a vegetable paste so as to have a substantially uniform thickness. A linen cloth for the slope greening method, which is characterized by spraying and attaching seeds.