KR19980063402A - Vegetation-based composition method of continuous fiber mixing - Google Patents

Abstract

A vegetation-based composition method for introducing continuous fibers using an air-suction two-liquid mixing nozzle, which enhances the effect as a binding material of the continuous fibers and improves the effect of preventing vegetation-based erosion resistance and slipping off. To provide.

The vegetation-based composition method according to the present invention comprises mixing continuous fibers in a muddy substrate in which the viscous soil, which is a vegetation-based mud, is turned into mud by an air-suction two-liquid mixing nozzle. The aggregation agent for aggregating the base materials is mixed, and it is a method of making higher order aggregation through air.

Description

Vegetation-based composition method of continuous fiber mixing

The present invention relates to a vegetation-based composition method for restoring greening on bare slopes or slopes caused by disasters and development projects, and a spraying device used in the method.

The topsoil that has been accumulated over the years by the nature of the natural world, that is, the vegetated slope, which has been scraped from the vegetation base, is often a hard soil of weathering or rock slopes, and is not suitable as a vegetation base. For this reason, in order to restore vegetation, the spraying of the vegetation base material which sprays the soil and organic material which can become a vegetation base to thickness of about 3-10 cm is performed. In particular, the slope of the slope surface generated by the development work or the like is often a steep slope. In order to prevent vegetation-based erosion formed by spraying onto the slope surface of such steep slopes, a method of improving erosion resistance by mixing cement or binder resin in the vegetation base and hardening is generally used. However, this method requires the incorporation of a large amount of cement or resin in order to increase vegetation-based erosion resistance, which causes the seed germination or growth.

In order to solve this problem, a viscous soil that becomes vegetation-based soil is made into a mud state, and the mud state substrate is referred to as a flocculant (hereinafter, referred to as a gathering agent) in an air suction type mixing nozzle. ) And a spray nozzle was developed to create a vegetation-resistant vegetation base by spraying while collecting higher air as a medium (Patent No. 61-80801). Hereinafter, this spray nozzle is also called air suction type 2 liquid mixing nozzle. According to the vegetation-based composition method using the spray nozzle, the muddy state of the high-aggregated material collected by the mixing of air reacts completely and many gaps are formed. It is described that a vegetation base can be created, thereby promoting seed germination and growth. However, rock slopes cut by steep slopes are generally severe inwards and outwards and partially vertical or inverse slopes occur. Rainwater is concentrated in these concave and convex areas, and the vegetation base attached to the vertical and reverse gradient surfaces may slide off. For this reason, the muddy base material which mixed vegetable short fiber in viscous soil as a connection material between particles is used as a vegetation base material.

It is thought that it is preferable to mix long fibers in order to obtain a sufficient effect as the connecting material, but it is difficult to use long fibers because they are entangled in a stirring shaft or a pump. Therefore, the continuous fiber is guided from the air suction port of the air suction type two-liquid mixing nozzle to the nozzle discharge port in advance, and is tensioned by the discharge pressure of the muddy substrate, and the continuous fiber is mixed three-dimensionally in the vegetation base together with the muddy substrate. (Japanese Patent Application Laid-Open No. 1-310019) has been developed. In this method, a muddy substrate, aggregate and continuous fibers are simultaneously mixed with air.

However, in this method, since the continuous fiber plays a physical role of mediation in the vegetation base, the coupling effect between the particles is not necessarily sufficient. At the time of construction, the vegetation base material is ejected at a distance of 30 to 40 cm from the nozzle, at which time the trackability of the continuous fiber to the muddy substrate is poor. This proves that the mud-like substrate and continuous fibers are scattered and adhered to individual places at the time of construction, and that the effect of preventing the vegetation-based erosion resistance and slipping off after adhesion is not so high. In the above vegetation-based composition method, there is a need to further improve the effect of the continuous fiber as a connecting material and to improve the effect of preventing vegetation-based erosion resistance and slipping.

It is an object of the present invention to further enhance the effect as a connecting member by entangled continuous fibers between particles in the vegetation-based composition method and to improve the effect of preventing vegetation-based erosion resistance and slipping.

The present invention provides an aggregator for mixing mud-based substrates and continuous fibers in which viscous soils, which are vegetation-based muds, are mixed with air by a suction-type two-liquid mixing nozzle, and then collecting the mud-based substrates thereafter. It is a method for forming a vegetation base that is sprayed while mixing with higher air as a medium by mixing.

1 is a side view of a spray nozzle used in the conventional method and the present invention.

2 is a schematic view of a polynet for preventing the scattering of continuous fibers;

Figure 3 is a schematic view of the polynet of the state covered with a wound bobbin of continuous fiber.

4 is a perspective view of a continuous fiber feeder for supplying continuous fibers to a nozzle;

5 is an enlarged view of a fiber supply unit of the continuous fiber feeder of FIG.

Figure 6 is an enlarged view of the fiber containment vessel support of the continuous fiber feeder of FIG.

7 is a perspective view of an air suction two-liquid mixing nozzle.

8 is an enlarged view of the supply suction portion and the continuous fiber insertion port of the nozzle of FIG.

9 is an enlarged view of the continuous fiber insertion port of the nozzle of FIG.

10 is an exploded view of a ceramic roll valve for controlling the amount of the muddy substrate;

11 is an exploded view of a ceramic throttle of a ceramic roll valve.

12 is an overall view of an apparatus for spraying vegetation base material.

* Description of the symbols for the main parts of the drawings *

A: muddy base material B: aggregate

C: Continuous fiber 1: Coarse coke of muddy base material

2: spout of muddy base material 3: stirring tube

3A: stirring blade 4: air intake

5 continuous fiber insertion slot 6: aggregate weighing cock

The muddy base material that can be used in the present invention generally includes turmeric, inorganic soil improving material, organic soil improving material, fertilizer, curing material, stabilizer and seed. Natural soils such as black loam, red soil, etc., and organic soil improving materials include bark compost and peat moss, and zeolite, vermiculite, pearlite, and the like. These inorganic soil reformers and / or organic soil reformers may be used in combination with the soil material as appropriate. Conventional chemical fertilizers and the like can also be used as fertilizers and vegetable fats and oils, vinyl acetate emulsions, vinyl chloride emulsions, surfactants, absorbent polymers, and the like. By mixing these substrates and water, a muddy substrate is formed. Commercially available loam that can be used in the present invention is, for example, jet soil, fertilizer and cured material are jet sheet D, and stabilizer is magsol D, all of which are products of Psycho. Seeds may be selected from the herbaceous plants, the tree species and the tree species as desired. The aggregation agent which can be used in the present invention may be a polymer flocculant or the like used in the art, and is, for example, Soil floc (produced by Psycho Co., Ltd.). As continuous fibers, aromatic and aliphatic polyester fibers, synthetic fibers such as polypropylene fibers, regenerated fibers such as leyong and vinylon, or natural fibers such as silk and cotton can be used.

1 shows a spray nozzle of an apparatus that can be used in the method of the invention. The muddy base material A sent by the muddy base material delivery pump is controlled by the muddy base material coke 1 (for example, a ball valve or a ceramic roll valve) and reaches the spout 2. Then, it blows into the stirring cylinder 3 after that. This jet causes negative pressure to be generated in the vicinity of the jet port 2, whereby air is sucked into the cylinder from the air suction port 4. Alternatively, air may be forcibly introduced as compressed air. Thereafter, the aggregate is regulated in flow rate to the collective coke 6 and introduced downstream of the continuous fiber inlet and at the inlet of the stirring vessel. Preferably, the stirring blade 3A is attached to the stirring cylinder for performing favorable stirring. Vegetation-based materials including muddy substrates, continuous fibers and aggregates are discharged from the mixing vessel and attached to the construction surface while causing the aggregate reaction.

4 shows a continuous fiber feeder that may be used in the present invention. The continuous fiber is wound around each bobbin in each bobbin case and is introduced into the spray nozzle from the continuous fiber insertion port via each guide hole and guide pipe. In order to change the spray rate of the vegetation base material, when the discharge rate of the muddy substrate is changed, the feed rate of the continuous fibers is difficult to follow the rate change. In order to increase the follow-up of the speed change, the tension of the fiber in the vicinity of the continuous fiber insertion port is desired to be as small as possible, so that the tension is appropriate to prevent the fiber from flying and scattering. The continuous fibers are generally fed at a speed of about 20 meters per second. For this reason, when resistance is concentrated in one place, static electricity is generated at the contact point, which leads to a smooth supply, and the fiber may be cut. In order to solve this problem, in the present invention, the bobbin wound around the continuous fiber is covered with a flexible resin net (polynet) which is slightly smaller than the bobbin on the opposite side of the fiber outlet of the bobbin and gives a moderate resistance to the fiber drawn out. Tensioned and can be supplied. This stretchable polynet is capable of applying a constant pressure as the continuous fiber is drawn out from the bobbin and shrinks as the diameter of the fiber winding decreases, and the fiber is drawn out smoothly. In addition, this polynet can prevent the fibers from scattering by centrifugal force in the outer circumferential direction of the bobbin generated by the rapid withdrawal of the fibers.

In order to adjust the flow rate of a muddy base material, the coke 1 of a muddy base material is used. In order to increase the stirring efficiency in the nozzle, a ball valve which can change the discharge direction and the discharge direction at the same time can be generally used as a control valve. The wear is severely caused by fine sand in the cohesive soil (floating soil) included in the base material. In this case, it is difficult to replace the wear place (ball part). Therefore, it is particularly preferable to use a wear-resistant material for the wear portion and to be able to easily replace the place of wear when worn. The conventional ball valve is difficult to remove the valve portion, it is necessary to replace the entire ball valve and the maintenance cost was high. In order to solve this problem, it is considered to use a ceramic roll valve in which a wear part directly contacting the mud substrate is made of ceramic. However, there is a drawback that the ceramic machined portion is likely to be broken at the contact surfaces of the ceramic members, in particular, the contact surfaces of the ceramic rolls and the ceramic roll cover due to the vibration during the discharge of the muddy substrate. For this reason, at least one of the contact surfaces of ceramics, for example, can be prevented from breaking by providing the impact resistant film with the impact resistant film by the bristles of very short single fibers, for example.

In the method of the present invention, continuous fibers are introduced at the fiber introduction port. When a large number of fibers are introduced at the same nozzle, the fibers are bundled in a muddy substrate, and there has been a conventional problem that the coupling effect of the continuous fibers is lowered. In order to solve this, it is possible to further separate by dispersing the continuous fiber and increase the coupling effect by introducing the fiber from the plurality of continuous fiber inlets.

EXAMPLE

An experiment was conducted to compare the vegetation-based composition method of the present invention and the vegetation-based composition method using a conventional air suction type 2-liquid mixing nozzle.

Test sample (per 4㎥ volume of vegetation base)

1. Mud

Amount

Seed (3 varieties) 2.0㎏

Clay soil 2500 liters

Fertilizers, Curing Materials (Jet Sheet) 960ℓ

Stabilizer (Magsol D) 90ℓ

Fresh Water 2000ℓ

2. Aqueous solution

Amount

Collecting agent (soil floc) 600 g

Fresh Water 300ℓ

3. Stiffener

Amount

Continuous Fiber440g

-Test details and test results

1.Following distance of continuous fiber to muddy substrate

By spraying the vegetation base on the slanted slope using a spray nozzle in which the muddy base material, aggregate and continuous fiber are mixed at the same time, and the spray nozzle in which the muddy base material and continuous fiber are first mixed and then the aggregate is mixed. The conventional method and the method of the present invention were compared. The spray nozzle was measured at a distance of 10 m to 40 m of the bare slope.

Following distance

Conventional method 10 to 15 m

Method of the invention30 to 45m

2. Vegetation-based erosion resistance

Vegetation-based erosion resistance was investigated by measuring the amount of soil spilled from the vegetation base when the rain was dropped using a artificial rainfall apparatus after spraying the vegetation base to 10 cm thickness on the bare slope. The results are shown in the table below.

Runoff volume per day and unit area

3 days after 1 week after 1 month after 6 months

Method of the invention g / m 2 803 10

Conventional method g / ㎡ 147 410

Single fiber g / ㎡

(Note) Naji slope grade = 1: 1.0

Rainfall intensity = 100㎜ / min (5m drop height)

Rainfall Duration = 60 minutes

Outflow soil = dry soil weight per 1㎡

The short fiber is a test in which short fibers of the same material are mixed instead of continuous fibers.

The above results indicate that the vegetation base prepared by the method of the present invention has a small amount of outflow soil and high corrosion resistance.

3. Effective to prevent slipping

Sliding vegetation of sprayed vegetation bases is generally due to runoff during construction and cracking due to shrinkage during drying of the foundation. The anti-dripping effect is evaluated as a thickness that can be sprayed once in a row without causing dripping. The thicker the thickness, the higher the anti-dripping effect and the improved construction efficiency. Cracking is caused by the expansion and contraction of the wet and dry clay particles contained in a large amount in the base. The cracking causes the vegetation base to peel off from the slope, causing it to slip off.

3-1. Falling prevention effect during construction

The test was carried out by using an air-suction two-liquid mixing nozzle on a 45 ° gradient soft rock slope surface and spraying the vegetation base composed of the muddy substrate, continuous fibers, and aggregates. The results are shown in the table below.

Spraying method Thickness of base attached one time in a row

Method of the present invention 7 cm

5cm

Short fiber 3cm

The above results indicate that the vegetation-based anti-dripping effect produced by the method of the present invention is high. The muddy substrate has a texture that is mixed and agitated with the aggregation agent in the nozzle, aggregated, calcined, and stabilized to adhere. However, the calcined base may flow due to the flow of water generated by dehydration. In the conventional method, since the continuous fibers were mixed with the muddy substrate and the aggregation agent was mixed, the aggregation occurred before sufficient three-dimensional dispersion of the fibers, and as a result, the fibers were only physically inserted between the particles. In contrast, in the method of the present invention, aggregation occurs after the fibers are sufficiently dispersed in the muddy substrate, and as a result, the fibers are inserted into the particles.

3-2. Split prevention effect

The test was carried out in the same manner as in the above method 3-1.

The results are shown in the table below.

Foundation composition method divergence state

The method of the present invention is almost invisible.

The conventional law is somewhat visible.

Short fiber visible

The above results indicate that the vegetation-based cracking prevention effect produced by the method of the present invention is high.

In the vegetation phase, a lot of clay is used, which is expected to be conservative and fertilizer-protective. The vegetation foundation tends to shrink and crack with drying of the foundation. In order to protect the vegetation base from this cracking, a method of spraying the vegetation base after spraying the base of the repair or steel net on the slope is adopted. The above results show that the method of the present invention achieves sufficient cracking preventing effect even without using a conventionally used base net.

Using the method of the present invention, the following effects are obtained.

1. One spray can attach thick vegetation base and shorten working time.

2. Because of the high effect of preventing cracks, the slope surface of the toy boat can create vegetation base without using a base net.

3. The effect of preventing vegetation-based erosion and slipping is improved.

Claims (5)

By mixing mud-based substrates and continuous fibers mudified in viscous soils that become vegetation-based muds with air suction-type two-liquid mixing nozzles, and then mixing a collecting agent for collecting the muddy-based substrates, Vegetation-based composition method characterized in that the spraying while the higher order aggregation through the air. In the air suction type two-liquid mixing nozzle used in the vegetation-based composition method of claim 1, The tip of the jet of the mud-like substrate is throttle-shaped, and the cylinders are successively provided at the tip, and an air suction port is provided on the side of the cylinder near the jet port, and the continuous air is introduced into the cylinder from the air suction port. A continuous fiber insertion port is provided nearby, and the air suction type two-liquid mixing nozzle is provided with the aggregation agent introduction port for introducing a aggregation agent downstream of the said air intake port. The air suction type two-liquid mixing nozzle according to claim 2, wherein two or more continuous fiber insertion openings are present. In the fiber feeder supplied with the continuous fiber wound on the bobbin used in the method according to claim 1, The fiber feeder, characterized in that the elastic resin net is covered in the bobbin wound the continuous fiber so that the continuous fiber is supplied stably with a constant tension. In the ceramic roll valve for adjusting the introduction amount of the muddy substrate used in the method according to claim 1, A ceramic roll valve having at least one side of said member with an impact resistant film of short fibers for preventing breakage due to vibration impact on contact surfaces of ceramic processed members.