JPS63284322A - Soil dressing spraying method - Google Patents

Abstract

PURPOSE:To make it possible to spray the muddy earth by means of a mortar sprayer by supplying water with the earth into a conveyance horse on a specified distance from the tip of a nozzle together with a conveyance of the earth to the nozzle on the edge of the horse by compressed air from the mortar sprayer. CONSTITUTION:Compressed air is produced by a condenser 1. The dried earth filled into a mortar sprayer 2 is conveyed to the position of the tip of a horse for the field of slope 7 by means of a conveyance horse 4 by making use of compressed air. Water supply is carried out by the conveyance horse 4 on 20m length from the tip of nozzle on the edge of the horse. When an operator 5 directs the nozzle 6 on the edge of the horse to the slope 7, the earth 8 is jetted to the slope 7 from the nozzle 6 to form the soil dressing.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention generally relates to a soil spraying method. In particular, this construction method is suitable for mountain forests, slopes created when paths are cut, etc.
It is suitable for the soil spraying method for protecting and greening trees, but is not limited to this method.

[Conventional technology] The following are currently known techniques for spraying soil to protect and revegetate slopes.

In other words, seeds are grown using a soil spraying machine such as Theta or Minicrete.
In this method, a mixture of fertilizer, soil, water, etc. is sprayed onto the slope to a thickness of 1 to 5 cm using compressed air, and then a polymeric corrosion inhibitor such as asphalt emulsion is sprayed and cured. It is usually combined with a wire mesh construction method in preparation for rain and freezing.

[Problems to be Solved by the Invention] It is a very difficult technique to pump muddy soil from a mortar sprayer through a hose to the tip of a nozzle and spray it onto a slope.

If there is a lot of water in the mud, high pressure is required to pump the hose, and high-pressure air is intermittently ejected from the nozzle, causing the nozzle to shake and become unsupported.

In addition, it is difficult to pump the mud from the mortar sprayer to the end of the hose because of the large resistance. This pressure feeding requires a very expensive soil spraying machine. Furthermore, with current spraying technology, the spray surface is not stable and can be washed away by rain. As mentioned above, it is used in conjunction with the wire mesh method,
Even so, the loss of land cannot be avoided.

Is it possible to transport and spray dry soil? It is necessary to sprinkle water after spraying, and the spraying surface is too hard, so the seeds may not germinate or have poor growth even if they germinate. .

Additionally, soil with a high sand content is often washed away by rainfall.

The present invention was made in view of the above-mentioned problems, and uses a current mortar spraying machine to spray muddy soil of appropriate softness onto the slope without using an expensive soil spraying machine. The purpose is to provide a construction method for attaching.

[Means for Solving the Problems] The soil spraying method of the present invention transports soil from a mortar sprayer to a nozzle at the end of a hose using compressed air, and also transports soil within 20 meters from the nozzle end of this hose. It is characterized by supplying water to the soil in the hose.

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings.

FIG. 1 is a schematic diagram of the arrangement of equipment used in the construction method according to the present invention.

Each of these devices is nearly identical to that used in traditional mortar and concrete spraying techniques.

First, the compressor 1 produces compressed air.

The dry soil charged into the mortar spraying machine 2 is transported by the transport hose 4 to the position of the hose tip at the slope site using this compressed air. Dry soil generated at construction sites can be sieved to obtain high-quality soil, and then used by mixing fertilizer, seeds, etc. into the sieve as needed.

The fertilizer preferably contains germanium and carbon in addition to the usual ingredients (nitrogen, potash, phosphorus, silica oxide, iron oxide, calcium oxide, manganese), etc. It is also preferable to include compost such as cow dung or chicken dung.

The distance from the mortar spraying machine 2 to the site is usually about 60 to 100 m using three to five 20 m hoses. The thickness of the transport hose 4 is generally 42 mm in diameter. At the site, when the worker 5 points the nozzle 6 at the end of the hose toward the slope 7, the soil 8 is sprayed from the nozzle 6 onto the slope 7 and becomes soil.

The thickness of the soil can be selected as required, but is generally about 1 to 10 cm.

Before soil injection, it is preferable to lay a wire mesh 9 on the slope surface 7 according to the spraying pressure in order to increase the stability of the soil.

After soil injection, a polymeric erosion inhibitor such as an asphalt emulsion may be applied, as in the prior art, but this is usually not necessary.

The fundamental difference between the present invention and the prior art is the water supply location. In the prior art, water is mixed with the soil in a mortar sprayer and pumped through a hose in the form of a slurry.

In the present invention, as described above, water is supplied to the conveying hose within 20 m from the nozzle tip at the hose tip. Preferably, the water supply position is from 1 to 1 from the nozzle tip.
ion, more preferably 2 to 5 m. In general, if it is too close to the nozzle, the soil and water will not mix sufficiently, and if it is not reached, the muddy soil will have to be pumped over a long distance, causing the problems described in the prior art.

Preferably, branched connecting pipes 10, 11, 12 as shown in FIGS. 2-4 are used for water supply.

The main body pipe parts 13, 14, and 15 are used for conveying soil,
Branch pipes 16, 17, and 18 are used for water supply.

By increasing the number of branches (branch 19 in Fig. 4), not only water but also compressed air may be supplied from there. Further, it is preferable that the installation angle of the branch pipes is adjusted so as not to obstruct the flow of soil within the main pipe. That is, as shown in Fig. 2, the main pipe 13 is formed non-linearly to direct the water in the axial direction of the connecting hose, or as shown in Figs. Preferably, the branch pipes 16, 17, 18 are installed at an angle that results in the following.

Water may be supplied at one location or at several locations as long as it is within the above range.

The amount of water to be supplied is determined based on the hardness and softness of the soil being sprayed.
It can be increased or decreased by adjusting the water supply valve of the water supply pump 20.

A water retention agent, a binder, a binder, a fertilizer, etc. can be mixed in advance into the water to be supplied.

[Operations and Effects of the Invention] According to the present invention, since the dry soil and water are mixed near the nozzle, there is little resistance to conveying the soil, and therefore, the present invention can be carried out without using a special soil spraying machine. You can easily spray muddy soil using a mortar spraying machine.

[Example] Construction work was carried out in which soil was sprayed onto the slope 7 using the various devices described above in a mountain forest in Mie Prefecture. A wire mesh 8 is placed on the slope surface 7 in advance.
was installed. The soil was collected on site, sieved to remove pebbles, and mixed with fertilizer and seeds.

The distance from mortar sprayer 2 to the site was approximately 60 m. The water supply position was 5 m from the tip of the nozzle 6 at the tip of the hose. A connecting pipe 10 having the shape shown in FIG. 2 was used for water supply. The diameter of the connecting pipe main body pipe 13 is 42 m.
The diameter of the m1 branch pipe 16 was 6 mm.

Soil was sprayed onto the slope surface 7 while adjusting the amount of water supplied.

The sprayed surface was muddy and had a suitable softness.

After the spraying work, it rained twice in 10 days, but the soil was not washed away.

Ten days after construction, wildflowers broke through the soil and sprouted.

In addition, small cracks appeared in some places on the soil. These cracks are evidence that soil of appropriate softness has been stably sprayed, and are very desirable.

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram of the arrangement of equipment used in the construction method according to the present invention. Figures 2 to 4 are perspective views of three types of branched connecting pipes used for water supply. 2...Mortar spray machine 4...Transport hose 6...φ hose nozzle

Claims (1)

[Claims] 1. Transporting soil from a mortar sprayer (2) to a nozzle (6) at the tip of a hose (4) by compressed air,
This soil spraying method is characterized by supplying water to the soil in the conveying hose (4) up to 20 meters from the tip of the nozzle (6). 2. The soil spraying method according to claim 1, wherein water is supplied between 1 and 10 meters from the tip of the nozzle (6) of the conveying hose. 3. The soil spraying method according to claim 1 or 2, which uses branched connecting pipes (10, 11, 12) for water supply. 4. The water supply direction from the branch pipes (16, 17, 18) is inclined so as not to obstruct the flow of soil in the main pipe (13, 14, 15). The soil spraying method described in any one of these. 5. The soil spraying method according to any one of claims 1 to 4, wherein a wire mesh (9) is laid on the slope (7) prior to soil spraying. 6. The soil spraying method according to any one of claims 1 to 5, wherein germanium and carbon are mixed in the soil to be sprayed.