KR101095498B1 - Fixation method of slope surface using spoil - Google Patents

Abstract

PURPOSE: A method of fixing the surface of a slope using dredged soil is provided to stably fix the surface of a slope at a low cost by minimizing the use of external soil. CONSTITUTION: A method of fixing the surface of a slope using dredged soil is as follows. Dredged soil of 50-80volume% is mixed with mountain soil of 20-50volume% to form vegetation soil. A soil improvement material of 40-80kg per 1m^3 vegetation soil is mixed to manufacture soil composition for slope vegetation. The soil composition for slope vegetation is covered on the slope. The seed of plant is sown on the covered slope and a mat is covered.

Description

Fixation method of slope surface using spoil}

The present invention relates to a method of surface fixation of slopes using dredged soil, in particular, to stabilize the surface of the slope formed by embedding the seabed dredged soil, including the dredged soil soil composition and method of surface fixation of slope using seed sowing It is about.

Current indicators fixed on the dike slope of mountain taken Saturday on the seabed dredged 15 ~ 30㎝-applied and Korea deuljandi (Zoysia japonica ) is constructed with flat or lined cuts, especially in the case of lined lines, where the cover rate is slower than expected and war against weeds. It hasn't had enough surface fixation effects, such as a complete death in less than a year.

For example, the Saemangeum Reclamation Project is a national project to build a new land and appeal of 40,100 ha by constructing the world's longest dike (33.9km) connecting Buan-gun and Jeollabuk-do, Jeollabuk-do, and building a waterproofing agent. Since the amount of landfill material used for reclaiming Saemangeum reclaimed land is estimated at more than 700 million ㎥, it is judged that it is impossible to reclaim and reclaim it with soil such as mountain extract soil like existing reclaimed land. Therefore, the principle is to reclaim and reclaim the whole reclaimed land with only subsurface dredged soil (Korea Rural Development Corporation, 2008). The Saemangeum Aid System is no exception. The dredged soil in this area is low in clay composition and mostly composed of sand, which is vulnerable to wind and food modifications. Therefore, surface fixation should be done early due to the characteristics of coastal areas where erosion occurs rapidly due to precipitation and strong winds. _{; 2009b;} juyounggyu et al., 1997). As such, the land surface fixation by natural vegetation invasion is difficult because the land surface is very fluid and inadequate for plant growth. On the other hand, the surface fixation by grass composition has the effect of preventing rain erosion caused by raindrops directly applied to the soil and ground degradation caused by it (Korea Grass Association, 2009). It is necessary for the composition. In coastal landfills and reclaimed lands such as Saemangeum, not only the growth of plants is poor due to salt damage caused by wind and splash (Jung Yong-ho, 2010a _; 2010b _; Kim Woo-young, 2010). In addition, it is very difficult to manage the grass sown once in inappropriate soils, so it is very important to create an optimal soil environment before planting (Kim Jun-bum et al. 2009).

The present invention is derived from the above background, the present invention is to minimize the amount of soil used in the external loading, and to reduce the cost by normally growing plants on the surface of the salted slope such as reclaimed land using dredged soil used for land reclamation It is to provide a way to fix the slope of the slope stably.

In order to solve the above object of the present invention, the present invention is a slope by mixing the soil improver 40 ~ 80kg per 1㎥ of vegetation soil formed by mixing 50 ~ 80% by volume of dredged soil and 20 ~ 50% by volume of soil taken from the acid Preparing a vegetation soil composition; Covering the slope vegetation soil composition on a slope; And seeding plant seeds and covering the soil on the covered slopes, wherein the soil improver comprises: (a) a calcium promoter and a magnesium compound in a weight ratio of 3 to 5: 1; Group 1 improved material consisting of 85% by weight, 1 to 6% by weight of agglomerate particles containing iron and aluminum compounds in a weight ratio of 6 to 8: 1 and 10 to 30% by weight of soiling accelerators containing silicon compounds; (b) 55 to 80% by weight of organic bark or oak, oak, oak, oak, oak, chestnut, oak, oak, birch, birch or crushed and fully fermented , Nitrogen compound 3-18 wt%, phosphoric acid compound 3-25 wt%, girly compound 2-7 wt%, sulfur compound 0.3-0.5 wt%, molybdenum compound 0.5-1 wt%, boron compound 1-3 wt%, zinc 0.5-0.8 wt.% Compound, manganese Group 2 improved material consisting of 0.5 to 1.0% by weight of the compound, 0.3 to 0.8% by weight of the copper compound and 0.3 to 0.5% by weight of the chlorine compound, and (c) anabaena, anabaenopsis, and dactirococorpsis It provides a method for surface fixation of slopes comprising three groups of improved substances consisting of (dactylococcopsis), synechocystis and microcystis .

Since the surface fixing method of the slope according to the present invention minimizes the amount of mountain soil brought in from the outside by about 20%, the conventional slope index including the step of forming the ground by the mountain soil and introducing the vegetation, such as filed or flat Compared to the fixed method, the construction cost is reduced to about one third, which is excellent in economic efficiency. In addition, the surface fixation method of the slope according to the present invention significantly improved the acidity and salinity of the slope compared to the slope surface fixing method using only the mountain soil, two to three months after planting of plant seeds compared to the conventional peeling method After this, the coverage of the plant seeds becomes 100%, so that the surface of the dredged slope can be fixed stably at an early stage.

1 is a view showing the growth of the Korean grass turf in the treatment treatment A (Comparative Example 1) was constructed by gluing, Figure 2 is a view showing the growth of the seedling grass seed in Korea treatment B (Example 1), Figure 3 Shows the growth status of Korean grass seed sown in C treatment (Example 2).
4 is a graph showing the coverage of each treatment tool (A treatment tool, B treatment tool, and C treatment tool).

The present invention relates to a method of fixing the surface of the slope, by using the soil composition and sowing of the plant seeds to convert the slope of the slope into soil capable of the normal growth of plant seeds using a dredged soil, soil collected from the mountain, and a soil improver Characterized by the introduction of vegetation. Hereinafter, the present invention will be described in detail.

The surface fixing method of slope according to the present invention is a slope vegetation soil by mixing a soil improver 40 ~ 80kg per 1㎥ of vegetation soil mixed with 50 ~ 80% by volume of dredged soil and 20 ~ 50% by volume of soil taken from the acid Preparing a composition; Covering the slope vegetation soil composition on a slope; And seeding the seed of the plant on the covered slopes and covering the giant. Hereinafter, the present invention will be described by dividing each step.

slope For vegetation  Steps to prepare the soil composition

In the present invention, the slope vegetation soil composition is a mixture of 50 ~ 80% by volume of the dredged soil and 20 ~ 50% by volume of the soil taken from the acid mixed soil improver 40 ~ 80kg per 1㎥ of the vegetation soil. At this time, when the soil collected from the mountain is about 20% by volume, the normal growth of plant seeds is possible on the slope of the slope, but when watering is difficult, the soil collected from the mountain may be used by about 50% by volume. The dredged soil is a general term for all types of soil, sand, sand, etc. deposited when dredging the bottom of the lake, sea, river, etc., the surface fixing method of the slope according to the present invention is mainly landfills, such as coastal landfill, reclaimed landfill It is preferable that it is a subsea dredged soil considering the point to be performed on the bed. In addition, the slope is preferably formed by embedding the seabed dredged soil.

The soil improver constituting the slope vegetation soil composition includes a group 1 improver, a group 2 improver, and a group 3 improver.

(a) Group 1 improved substances

Group 1 improved substances act to reduce the dispersibility and increase the cohesiveness of soil particles, which aggregates the soil particles of dredged soil to promote granulation (initiation accelerator), and to promote particle coagulation (particle coagulation). Accelerators) and substances that promote soiling (soilation promoters).

In the water-drained particulate soil, the introduced air (oxygen) accelerates the drying and promotes the physicochemical improvement of the soil by encouraging the activity of fermentation bacteria and aerobic bacteria present in the air, which are incorporated into organic materials contained in the Group 2 improved substances. Promote. In the process of fermentation and decomposition of organic substances that cause odors in sediment due to the activity of bacteria, the generation of hydrogen sulfide or methane gas is reduced, and carbon dioxide, which is generally generated, is gas exchanged through soil pores. In addition, the inflow and outflow of these gas bodies between soil particles encourages the development of soil voids. As soil voids develop, dispersible sodium ions and potassium ions that are released by substitutional ions are discharged through the pores while dissolved in water. Sodium ions and potassium ions are discharged to prevent the dispersion of particulate soils. To make things faster.

The granulation accelerator, particle coagulation accelerator, and soil accelerator, which are components of the Group 1 improved substance, which bring about such effects, are described in detail.

First, the initiation promoter includes a calcium compound and a magnesium compound. At this time, the weight ratio of calcium compound: magnesium compound is preferably 3-5. The calcium compound is a compound selected from the group consisting of CaSO ₄ , CaCl ₂ , Ca (OH) ₂ , CaCO ₃ , Ca (NO ₃ ) ₂ , CaO, Ca (OH) ₂ , Ca (H ₂ PO ₄ ) ₂ or their Mixture. The magnesium compound is a compound selected from the group consisting of MgO, MgSO ₄ , MgCl ₂ , MgCO ₃ , MgNH ₂ PO ₄ , Mg ₂ P ₂ O ₇ , MgS, or a mixture thereof.

Particle coagulation accelerators include iron compounds and aluminum compounds. At this time, the weight ratio of iron compound to aluminum compound is preferably from 6 to 8: 1. The iron compound is selected from the group consisting of Fe-composite CaOFe ₂ O ₃ , CaOAl ₂ O ₃ Fe ₂ O ₃ , including FeO, Fe ₂ O ₃ , Fe ₃ O ₄ , FeS, FeSO ₄ , Fe-EDTA, or Mixtures thereof. The aluminum compound is selected from the group consisting of Al ₂ O ₃ , Al ₃ (SO ₄ ) ₃ , Al (OH) ₂ , AlK (SO ₄ ) ₂ , AlNH ₄ (SO ₄ ) _2, etc. Mixtures thereof.

The soiling promoter includes a silicon compound, which is a compound selected from the group consisting of SiO ₂ , CaSiO ₃ , CaOSiO ₂ , or the like, or mixtures thereof.

The composition of the group 1 improved material is 65 to 85% by weight of the granulation accelerator, 1 to 6% by weight of the particle coagulation accelerator, and 10 to 30% by weight of the soiling accelerator, based on the total weight of the group 1 improved material. Preferably it is 70 to 82 weight% of granulation accelerators, 2 to 5 weight% of particle coagulation promoters, and 15 to 25 weight% of soiling accelerators.

If soil dispersibility decreases and promotes initiation with Group 1 improved materials, soil voids increase, resulting in a sharp increase in permeability. Due to this effect, dispersible ions that have been biased in the soil are leached with water, and various anions are present in the dredged soil.

The mixing amount of the group 1 improving substance in the soil improving agent is preferably 35 to 54.9 wt%, more preferably 40 to 49.8 wt% based on the total weight of the soil improving agent.

(b) Group 2 improved substances

Group 2 improved substances refer to soil stabilization, plant growth ionic mixtures and organics. Organic matter is supposed to ferment geodegradable organic matter which can contain organic components in soil for a long time. By mixing these components with the soil improver of the present invention, the nutrient elements necessary for the survival of life in the soil are added, and in particular, the nutrient elements necessary for plant growth are added, and the nutrient balance is compensated for when improving the sediment or sludge. Will be

In other words, the two-group improved substance complements the action of the one-group improved substance, and various cations and nutrient ions necessary for the growth of organic matter and plants become the main material source. If organic matter is mixed with low earth or sludge to be rapidly decomposed by microorganisms, there is a risk of increasing the viscosity rather than improving the physical properties of the soil. Therefore, the organic materials used in the improver are fermented microorganisms [4-5 and 10] after crushing the wood of bark or oaks (oak, gingko, oyster, oak, chestnut, oak, etc.) of low-degradable trees. Fermented bacteria belonging to the genus are used as fermentation microorganisms, such as bacillus subtilus, B. pumilus, micrococcus glutamicus. In addition, an effective microorganism (EM), which is a commercially available fermentation agent, can also be used. In addition to the wood of the oaks, wood or coconut fiber such as mulberry, birch, and birch may be completely fermented.

Organic substances used in the Group 2 improved substances are produced by fermenting organic substances with a high lignin content of oak and tree wood fibers as fermentation enzymes. The reason is that general organic matter is easy to decompose, so the effect is low in sustainability and the amount of corrosion remaining in the soil is small. These high quality organics have a water content of 30 to 50% by weight, fermented organic content of 50 to 70% by weight, and a carbohydrate to nitrogen ratio (Cabohydrate / Nitrogen ratio: C / N ratio) in the range of 30 to 35 (w / w). The heavy metal content must meet the national process standard.

Soil stability and plant growth ion mixtures are as follows. The nitrogen compound is a compound selected from the group consisting of (NH ₄ ) ₂ SO ₄ , NH ₄ NO ₃ , NH ₄ Cl, HNO ₃ , KNO ₃ , (NH ₂ ) ₂ CO and the like or a mixture thereof. Phosphoric acid compounds include H ₃ PO ₄ , KH ₂ PO ₄ , KH ₂ PO ₄ , K ₂ HPO ₄ , Soluble Ratio, Thomas In Ratio, NH ₄ H ₂ PO ₄ , (NH ₄ ) ₂ HPO ₄ , Sodium Phosphate, CaH ₂ PO ₄ , Ca (H ₂ PO ₄ ) ₂ , a compound selected from the group consisting of lime, superphosphate lime, or the like, or a mixture thereof, and the girly compound is composed of K ₂ SO ₄ , KCl, KNO ₃ , KHSO ₄ , KMnO ₄ , and the like. Compounds selected from the group or mixtures thereof. Composite materials of phosphoric acid and garlic include KH ₂ PO ₄ , K ₂ HPO _4, and the like. The sulfur compound is a compound selected from the group consisting of (NH ₄ ) ₂ SO ₄ , CaSO ₄ , MgSO ₄ , K ₂ SO ₄ , FeS, H ₂ SO ₄ and powdered sulfur or mixtures thereof, and the molybdenum compound is MoO, ammonium mole A compound selected from the group consisting of ribdate and sodium molybdate or mixtures thereof, and the boron compound is borax, boric acid (H ₃ BO ₃ ), K ₂ B ₄ O ₇ , B ₂ O ₃ , B ₂ O ₂ , H ₄ B ₂ O ₄ or the like selected from the group consisting of compounds or mixtures thereof, zinc compounds are selected from the group consisting of Zn (OH) ₂ , ZnSO ₄ , ZnCl ₂ and the like or mixtures thereof, manganese compounds are MnO ₂ , Mn ₂ O ₃ , Mn ₃ O ₄ , Mn (OH) ₂ , MnCl ₂ , MnSO ₄ or the like, or a mixture thereof. The copper compound is Cu (OH) ₂ , CuCl ₂ , CuSO ₄ Compound selected from the group consisting of the same or mixtures thereof, Small compounds _{KCl, NH 4 Cl, MgCl 2} , CaCl 2, is a mixture of the selected compound, or from the group consisting of HCl.

The amount of organic compounds and soil stabilization and plant growth ionic compound compounds that make up these two-group improved substances was 55 to 80 wt% based on the total weight of the two-group improved substances, 3 to 18 wt% nitrogen compounds, and phosphoric acid compounds. 3 to 25 weight percent silver, 2 to 7 weight percent girly, 0.3 to 0.5 weight percent sulfur, 0.5 to 1 weight percent molybdenum, 1 to 3 weight percent boron and 0.5 to 0.8 weight zinc %, Manganese compound is 0.5 to 1.0% by weight, copper compound is 0.3 to 0.8% by weight, and chlorine compound is 0.3 to 0.5% by weight. Preferably 60 to 75% by weight of organic compounds, 5 to 15% by weight of nitrogen compounds, 5 to 20% by weight of phosphoric acid compounds, 3 to 5% by weight of girly compounds, 0.3 to 0.5% by weight of sulfur compounds, molybdenum compounds 0.5 to 1% by weight, boron compound 1 to 3% by weight, zinc compound 0.5 to 0.8% by weight, manganese compound 0.5 to 1.0% by weight, copper compound 0.3 to 0.8% by weight, chlorine compound 0.3 to 0.5% by weight to be.

The mixing amount of the two groups of improving materials in the soil improving agent is preferably 45 to 64 wt%, more preferably 50 to 59.5 wt% based on the total weight of the soil improving agent.

(c) Group 3 improved substances

Group 3 modified substances are photosynthetic action among blue algae-cyanobacteria among the algae classified into nine sentences, cyanobacteria with high ability to synthesize complex sugars, and several species that freely dissolve Na ions in salt soil. It is mixed. Many blue-green algae of the type to be used is Ana vena (anabaena), Ana benop sheath (anabaenopsis), dakti Lokomotiv Cobb sheath (dactylococcopsis), cine Cauchy seutiseu (synechocystis), micro during seutiseu (microcystis), etc. and these extracts, the culture will be formulated .

These blue algae replace the excess sodium in the salt soil, promote the decomposition of organic matter in the soil, increase the effective organic matter content, fix nitrogen phosphate to increase the effectiveness of cations, and promote the release of salts in the soil. It prevents excessive salt damage, and acts as photosynthesis and polysaccharides to become a source of nutrients, and to improve the physical properties of promoting aeration and drainage by constructing the grain structure of the soil by the interaction of organic matter and microorganisms. It improves chemical properties such as calibration and prevents soil hardening under the influence of gases such as oxygen generated by photosynthesis. These cyanobacteria also have the effect of adsorbing heavy metals on various test records. These cyanobacteria are inoculated into bark low-degradable organics, that is, organic matter of two groups of improved substances, which have been fermented with cultured aerobic microorganisms. The algae you use will also greatly benefit the fixation of contaminants.

It is preferable that the mixing amount of the three groups of improving materials in the soil improving agent is 0.1 to 1.0 wt%, and more preferably 0.2 to 0.5 wt% based on the total weight of the soil improving agent.

Soil modifiers constituting the soil composition for the slope vegetation according to the present invention is commercially available, for example, BioGro-Eleven (hereinafter referred to as 'BG-11'; Manufacturer: Garim Environment Development, Korea, etc.), The product can be used by adjusting to the use of the present invention. Specifically, the soil improving agent constituting the soil composition for the slope vegetation according to the present invention in the following examples except zeolite, bentonite, vermiculite and activated carbon, silica, silicate and wollastonite. However, the soil improving agent used in the present invention does not exclude zeolite, bentonite, vermiculite, and mixtures of activated carbon, silica, silicate and wollastonite, for example, the soil improving agent used in the present invention d) zeolite 70 to 87 It may further comprise a residual amount of the Group 4 improved material consisting of 2% by weight, 2-15% by weight of bentonite, 2-15% by weight of vermiculite and 2-7% by weight of a mixture of activated carbon, silica, silicate and wollastonite.

slope For vegetation  Covering soil composition with slopes

In the surface fixing method of the slope according to the present invention, the step of covering the soil composition for the slope vegetation on the slope is a process of forming the growth ground of the vegetation on the slope, preferably, the growth ground of the vegetation on the dredge soil slope, the cover thickness is 20 Although the range of ˜150 cm is possible, the surface fixing method of the slope according to the present invention is preferably 20 to 50 cm, considering that it uses the seeding of plant seeds, not tree planting, as described below, and exceeds 50 cm. If you plant trees, you can also.

Sowing the seeds of the plant and covering the giant

When the vegetation ground of the slope is formed by the cover of the soil composition for slope vegetation, thereafter, seeding of the plant is carried out on the covered slope and a step of covering the giant is carried out. Sowing and covering the giants is the introduction of vegetation into the slopes. At this time, if the seed of the plant is a well-known thing used to fix the surface of the slope, such as grass seed, herbaceous seed, the type is not greatly limited, among these grass seeds, in particular, Korea grass ( Zoysia) japonica ) seeds. Korean grass has excellent resistance to fire, flame and hot tolerance.

Sowing of the plant seeds is carried out in the form of mechanical sowing using a seed sprayer (Hydroseeder), wherein the grass seeds are preferably sown at a density of 20 ~ 50g per m 2 of the covered slope. In addition, the grass seed is preferably seeded after being mixed with a surface improver such as pulp, wherein the mixing weight ratio of the grass seed and pulp is 2: 1 to 1: 1.

Later, the seedlings of the sown plants are covered with a giant to prevent drying of the seed and the loss of the seed by the wind. The giant is not limited in its kind and is considered straw straw in consideration of the natural function and environmental friendliness of the giant covering. desirable.

The seeds of the plant are sown on the covered slopes, covered with giants, and watering is carried out for the smooth growth of the seeds.

Hereinafter, the present invention will be described in more detail with reference to Examples. However, the following examples are only for clearly illustrating the present invention, and do not limit the protection scope of the present invention.

1. Survey Sheet

(1) test paper location and environment

The test site is 1.5km from Saemangeum embankment entrance in Gunsan-si, Jeollabuk-do, and is an area where the dredged soil is buried with a slope of about 5%. In addition to the problems of dredged soils, which are artificial grounds created in the middle of the sea, the soil is severely compacted, so the drainage is poor, and the direct damage of plants by strong wind, rain, spray, salt, etc. It has a very unfavorable environment for plant growth, such as excessive salts that accumulate on the topsoil.

(2) soil analysis of test paper

The test location was determined and the site survey was carried out on the artificial ground of the Saemangeum seawall dredged soil. Soil samples were taken by depth to analyze the chemical and physical properties to identify problems and to determine the direction of the test and the degree of improvement. The results of the physicochemical analysis of the subsea dredged soil collected from the test paper before the soil improvement (Saemangeum seawall) are shown in Table 1 below. As a result, Saturn was found to be Loamy Sand (LS) with a sand content of more than 70%. The dredged soil acidity (pH) of the test paper was strongly alkaline with a pH of at least 8.0. Nutrient ions such as nitrogen, phosphoric acid and other organic matters were found to be very low compared to general forest soils, and had high electrical conductivity (EC) and salt concentration (NaCl). The permeation rate is 3.5 × 10 ^-4 cm / sec at the depth of 30 cm, 1.7 × 10 ^-4 cm / sec at the depth of 60 cm, and 3.8 × 10 ^-4 cm / sec at the depth of 90 cm This figure indicates that the permeation rate is much slower than the range of general forest soils, which means that the soil is poorly ventilated and drained.

Analysis item Soil depth (cm) 10 30 60 90 Sand (%) 71.9 78.4 75.7 75.6 Mass (Slit,%) 17.8 18.1 20.1 22.5 Clay (%) 10.3 3.53 4.18 1.9 Soil texture LS LS LS LS Soil pH 8.61 9.53 10.13 8.64 Permeation Speed (cm / sec) - 3.5 × 10 ^-4 1.7 × 10 ^-4 3.8 × 10 ^-4 Organic matter (%) 0.04 0.09 0.10 0.15 Total nitrogen (%) 0.020 0.026 0.027 0.028 P ₂ O ₅ (mg / kg) 8.06 27.41 28.56 27.47 Cation exchange capacity (CEC, cmolc / ㎏) 4.01 3.86 4.08 4.00 K ⁺ (cmolc / kg) 0.1 1.0 1.0 1.0 Na ⁺ 0.15 5.06 6.43 6.17 Ca ^{2 +} 0.96 1.28 1.26 1.51 Mg ^{2 +} 0.79 2.05 2.30 2.12 EC (dS / m) 0.14 5.07 6.57 8.56 NaCl (Salinity,%) 0.012 0.192 0.251 0.351

2. Surface fixation of slopes (done in July 2009)

Example 1.

After mixing 50 vol% of seabed dredged soil and 50 vol% of acid soil brought in from the outside to make vegetation soil, 40kg of BG-11 (manufacturer: Garim Environment Development Co., Ltd.) per 1㎥ of the vegetation soil To prepare a slope vegetation soil composition by mixing. Thereafter, the soil composition for slope vegetation was covered with a depth of about 30 cm on the slope "B treatment" to form the ground of the slope. Afterwards, the Korean grass seed and pulp, a surface modifier, were mixed and machined to 20 g / m2 (slope area) and 12 g / m2 (slope area) on the slopes covered with seed roseder, respectively. Considering the characteristics of dredged soil that dries easily, mulching with rice straw was introduced to the slopes. After that, passive management and periodic irrigation such as watering and hand weeding on young weed shoots were performed.

Example 2.

After mixing 80 vol% of seabed dredged soil and 20 vol% of acid soil brought in from outside, the vegetation soil was formed, and BG-11 (manufacturer: Garim Environment Development Co., Ltd.) 60kg per 1㎥ of vegetation soil was manufactured. To prepare a slope vegetation soil composition by mixing. Thereafter, the soil composition for slope vegetation was covered with a depth of about 80 cm on the "C treatment" slope to form the ground of the slope. Afterwards, the Korean grass seed and pulp, a surface modifier, were mixed and machined to 20 g / m2 (slope area) and 12 g / m2 (slope area) on the slopes covered with seed roseder, respectively. Considering the characteristics of dredged soil that dries easily, mulching with rice straw was introduced to the slopes. After that, passive management and periodic irrigation such as watering and hand weeding on young weed shoots were performed.

Comparative Example 1.

Mountain soil brought in from the outside (not improved with soil improver, etc.) was covered with a depth of about 20 cm on the "A treatment zone" slope to form a ground of the slope. Later, the Korean grasses were lined up to introduce vegetation into the slopes. After that, passive management and periodic irrigation such as watering and hand weeding on young weed shoots were performed.

3. Surface fixation effect test of slope

(1) change in soil properties

In order to investigate the effect of soil improvement by surface fixation of slopes from about one month after sowing, soils 120 cm deep were collected and the soil acidity (pH) and salinity (NaCl concentration) were measured. 2 is shown.

Measuring date Comparative Example 1 Example 1 Example 2 PH (pH) NaCl (%) PH (pH) NaCl (%) PH (pH) NaCl (%) August 2009 8.6 0.35 7.7 0.02 7.0 0.03 September 2009 9.1 0.22 7.9 0.02 7.4 0.01 October 2009 9.5 0.16 7.6 0.01 8.0 0.02 November 2009 9.7 0.23 7.7 0.01 7.7 0.01

As shown in Table 2, when the surface of the slope is fixed according to the embodiment of the present invention, the salinity and pH of the slope soil are improved to a range where trees can grow after about a month (salt concentration is 0.05% or less, pH is 7 levels). On the other hand, when the surface of the slope according to the comparative example was fixed, the improvement of the soil was hardly achieved.

(2) Coverage rate and growth situation

In November 2010, about 16 months after sowing, the coverage and growth conditions (grass height, width and root length) were examined. Three 1m × 1m square spheres were installed and investigated, and the coverage was evaluated by visual coverage with 100% of the surface completely covered with grass (Kim, Jun-bum, 2008; Kim, Jun-bum, 2009; Ahn, Byung-gu, 2009; ). The height and width were measured by cutting and digital caliper each 1mm length and width of 20 leaflets arbitrarily determined in each square sphere. In addition, the root length was randomly selected from 10 cm x 10 cm square spheres in each square sphere, and the average value was obtained by three repeated measurements.

1 is a view showing the growth of the Korean grass turf in the treatment treatment A (Comparative Example 1) was constructed by gluing, Figure 2 is a view showing the growth of the seedling grass seed in Korea treatment B (Example 1), Figure 3 Shows the growth status of Korean grass seed sown in C treatment (Example 2).

1) Coverage

4 is a graph showing the coverage of each treatment tool (A treatment tool, B treatment tool, and C treatment tool). In FIG. 4, "SI" represents a soil improver, "DS" represents dredged soil, and "FS" represents mountain soil. As shown in FIG. 4, the coverage A is 43% in the conventional treatment method A, which covers only the soil brought in from the outside and is constructed by gluing the Korean grass, and it may take about two more years to complete the covering. On the other hand, in the treatment B and C treatment examples of the present invention, the coverage was 100%. In addition, although not shown in FIG. 4, in the treatment B and the treatment C as examples, the coverage was 100% at about 3 months after the seeding.

2) Growth situation

For growth analysis, grass height, width and root length were examined and the results are shown in Table 3.

Growth situation item Comparative Example 1 (A Treatment Zone) Example 1 (B treatment zone) Example 2 (C treatment zone) Leaf length (cm) 5.73 ± 1.0 5.97 ± 1.0 27.42 ± 1.0 Leaf width (cm) 1.97 ± 0.97 2.40 ± 0.61 3.79 ± 0.83 Root length (cm) 8.56 9.38 8.56

As shown in Table 3, the growth situation was excellent in Examples 1 (B treatment) and Example 2 (C treatment) of the present invention compared to Comparative Example 1 (A treatment treatment), which is a conventional method. In addition, in Example 2 (process C), if grass is grown more than necessary and only the surface fixation by planting of plant seeds is considered without considering arborescent tree planting, Example 1 (process B) is considered suitable. .

Although the present invention has been described through the above embodiments as described above, the present invention is not necessarily limited thereto, and various modifications can be made without departing from the scope and spirit of the present invention. In addition, many modifications may be made to adapt a particular situation and material to the teachings of the invention without departing from the essential scope thereof. Therefore, the protection scope of the present invention should not be construed as limited to the specific embodiments disclosed as the best mode contemplated for carrying out the invention, but including all embodiments falling within the scope of the claims appended hereto.

Claims (10)

Preparing a slope vegetation soil composition by mixing 40-80 kg of a soil improver per 1 m 3 of vegetation soil formed by mixing 50-80% by volume of dredged soil and 20-50% by volume of soil taken from an acid;
Covering the slope vegetation soil composition on a slope; And
Sowing the seeds of the plant on the covered slopes and covering the giant;
The soil improving agent (a) 65 to 85% by weight of the granulation promoter including a calcium compound and a magnesium compound in a weight ratio of 3 to 5: 1, and an iron compound and an aluminum compound in a weight ratio of 6 to 8: 1 A group 1 improved substance consisting of 1 to 6% by weight of a particle coagulant accelerator and 10 to 30% by weight of a soiling accelerator comprising a silicon compound, and (b) oak, oak, oak, ole oak, oak, tree or bark, 55 to 80% by weight of organic matters pulverized and completely fermented from wood, coconut, birch, birch or birch of chestnut, oak, birch, birch, nitrogen compound 3-18%, phosphoric acid compound 3-25%, girly compound 2 ~ 7 wt%, sulfur compound 0.3-0.5 wt%, molybdenum compound 0.5-1 wt%, boron compound 1-3 wt%, zinc compound 0.5-0.8 wt%, manganese compound 0.5-1.0 wt%, copper compound 0.3-0.8 wt% % And chlorine compounds 0.3 to 0.5% by weight Group 2 improvement material consisting of (c) Anabaena, Anabaenopsis, Dactylococcopsis, Synechocystis and Microcystis. Surface fixing method of the slope comprising a.
The surface fixation of slopes according to claim 1, wherein the soil improver comprises 35 to 54.9 wt% of Group 1 improved material, 45 to 64 wt% of Group 2 improved material, and 0.1 to 1.0 wt% of Group 3 improved material. Way.
The method according to claim 1 or 2, wherein the dredged soil is subsea dredged soil.
4. The method of claim 3, wherein the slope is formed by burying the dredged soil.
5. The method of fixing the slope of the slope according to claim 4, wherein the cover thickness is 20 to 50 cm.
6. The method of fixing the slope of the slope according to claim 5, wherein the seed of the plant is a grass seed.
7. The method of claim 6, wherein the grass seed is sown at a density of 20 to 50 g per 1 m 2 of the covered slopes.
8. The method of claim 7, wherein the grass seed is sown after being mixed with pulp.
10. The method of claim 8, wherein the mixing weight ratio of the grass seed and the pulp is 2: 1 to 1: 1.
10. The method of claim 9, wherein the giant is straw straw.

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