KR100886823B1 - A method of constructing the erosive prevention layer - Google Patents

Abstract

A method for constructing an erosive prevention layer is provided to fix plant stably and prevent erosion caused by the velocity of a moving fluid. A method for constructing an erosive prevention layer comprises the following steps of: forming a ditch on a lower part of a construction area and forming a leveling surface on the rest construction area(S100); coating the leveling surface with a plurality of double raschel textiles(S200); fixing the double raschel textiles on the leveling surface by putting a plurality of fixing pins on an end part and a connection part of the double raschel textiles(S300); filling the nature of the soil including soil or sand(S400); and nursing the plant on an upper part of the soil(S500).

Description

A method of constructing the erosive prevention layer

The present invention relates to a construction method for forming an erosion prevention layer, and more particularly, to a construction method for preventing erosion by flow velocity without vegetation of vegetation vegetation in a dike or riverbank.

An erosion prevention layer is required to protect the surface of the shore or river ground with a suitable material so that it will not be damaged by floods, waves, tsunamis and erosion. In the installation of the erosion prevention layer, the erosion prevention geotechnical fiber is installed in the erosion prevention layer to plant flowers, vegetation and grass to enable the environment-friendly construction.

In addition, the geo-textile is a permeable material used in conjunction with the foundation, natural soil, rock, and soil material, the geotextile is knitted fabric, There are three types of fabrics, nonwoven fabrics, and the like, and are used in the form of a web, a mat, a net, a grid, and a plastic sheet.

Fiber materials used in these geotextiles are mainly composed of thermoplastic fibers with excellent physical properties, mechanical properties and chemical resistance, and the role of geotextiles is in the soil structure, which filters water, separates soil and water, and soil structure. It is useful to be able to exert the reinforcing effect of water and the effect of draining water to the outside and the waterproofing effect of blocking the water according to the purpose.

Existing method of erosion prevention using existing fiber bands, ie, geotextiles, is to lay out the foam removal pits made according to the terrain of the construction site in advance and inject cement composition such as concrete or mortar into the foam removal pits with a high-pressure pump. Cement composition, such as mortar and mortar, can be formed to have a uniform thickness, which is superior in speed, stability, construction efficiency and economy compared to the conventional cast-in-place concrete method or precast block method. Compared to other construction methods, it is widely used because it is constructed with a large area as an integral part, so it is excellent in rigidity and minimizes the phenomenon of sediment.

The construction of erosion prevention using the conventional fiber band is because the fiber band injected with concrete composition between the river and the land, the sea and the land is completely blocked by covering the lake surface completely when it is installed on the coast or river, thus changing the ecosystem of the plant. In addition, the entire construction area is covered with a cement composition, such as concrete or mortar, to be matted, so that flowers, vegetation, grass, and microorganisms cannot grow, and moreover, flowers, vegetation, and grass cannot be planted. There was no problem in the nature of the structure at all.

Thus, in Korean Patent Laid-Open No. 2001-25308, when the concrete or mortar is injected, it is located on a slope to construct a fiber band including a pillar part where concrete pillars are formed and a filter part in which concrete or mortar is not injected. Injecting mortar into the fiber zone from the outside to form a pillar; Cutting the filter part when the mortar is sufficiently cured; A nail is installed after a hole is drilled in a direction perpendicular to a slope through the cut filter part; Grouting the hole with cement mortar; Fixing the nail onto the column through a support; inserting a washer into the bolt connected to the nail and then tightening with a nut; Filling the space or putting a plastic cap on the space so that the ends of the support and the bolts installed between the pillars are not exposed to air; To form a soil layer by putting soil in the filter unit is not installed; And the landscaping slope by installing a lawn carpet (lawn carpet) in which the grass seeds are planted, planting natural grass, vegetation, flowers or trees, or spraying their seeds on the ground soil (seed spray) To form; An environmentally friendly slope reinforcement method has been proposed, which comprises a step. However, the method has a problem that the filter material, such as soil, sand, aggregate, stone, etc. of the filter portion is eroded by the permeation generated before and after the sand stone, or when the permeation flow rate is severe, the filter portion collapses.

In addition, the above method forms a very large fiber band on the inclined surface of the filter part to the extent that the water permeation flow rate is not affected, so that erosion is prevented. Increasing the thickness of the filter part has a problem such as increase the construction period and increase the cost, so most of the mat is installed. However, when the mat is to be fixed, it is preferable to use a heavy mat in order to support the pressure of water, but when the mat is a heavy weight, it is not easy to handle the mat and there is a problem of limiting the size of the mat. . As a result, the mat installed in the filter part frequently causes erosion or collapse of the filter layer surface as the mat floats in a place where high water pressure is formed due to the difference between the sea level and the inner water level caused by the difference between tides.

In addition, Korean Patent Invention No. 774551, the contact cloth in close contact with the construction surface; The drainage net for discharging the water introduced into the center in the longitudinal direction to the upper portion of the contact cloth is fixed by the fabric portion, the inlet for injecting the filter material transferred by the water pressure into the upper side of the drainage network The upper surface of the drainage net is installed, the end is fixed in the longitudinal direction to form a cover to cover the drainage net, the edge of the fabric portion fixing the drainage net is combined with the contact cloth and the aggregate body is filled inside the tube body Erosion-proof tubular mat, characterized in that consisting of; has been proposed. However, there is a disadvantage in that the construction is cumbersome in the installation of the tubular mat.

In order to solve the above problems, an object of the present invention is to plant natural grass, vegetation, flowers or trees on three-dimensionally formed mats, or to apply a method of seed spraying on soil soil (seed spray) to change the flow rate. It is to provide a construction method of the erosion prevention layer according to.

In addition, another object of the present invention is to provide a method for constructing an erosion prevention layer exhibiting stability against erosion of rivers or banks, even with a simple construction method.

In order to achieve the above object, the present invention provides a construction method for forming an erosion prevention layer, forming a groove at an end portion of the construction surface, and stopping the remaining construction surface to form a stop surface; A step of connecting and covering the knitted fabric; A plurality of fixing pins by driving a plurality of fixing pins to the distal end and the connecting portion of the coated double-lasel knitted fabric; Fixing the double-lasel knitted fabric on a stationary surface; Filling the soil; It provides a method of constructing an erosion prevention layer comprising a; and vegetation on top of the filled soil.

In addition, the present invention is a construction method for forming an erosion prevention layer having a concrete surface at the distal end, the anchor pin is put on top of the concrete surface, which is the distal end of the construction surface so that 1/5 to 2/5 of the total length of the anchor pin protrudes A stop surface is formed by stopping the non-concrete surface; the end portion of the double-lassel knitted fabric is inserted into the anchor pin protruding from the upper surface of the concrete surface, and the upper surface of the entire surface from the concrete surface to the stop surface is inserted. Connecting and coating a plurality of double-lassel knitted fabrics; a top of the distal end portion of the double-lassel knitted fabric coated on the concrete surface is laminated with an anti-corrosion iron plate having a hole into which a protruding anchor pin can enter; Tighten the anchor pin protruding from the upper side of the iron plate with a nut to fix the end of the double-lassel knitted fabric coated on the concrete surface to the concrete surface. And the step of securing the connection of the double raschel knitted fabric with the coating is still a double raschel knitted fabric inlay with a plurality of fixing pins ground; the step of filling the soil, including sand or soil in the inside of the fixed double raschel knitted fabric; It provides a method of constructing an erosion prevention layer comprising a; and vegetation on top of the filled soil.

The present invention also provides a method for constructing an erosion prevention layer in which the connecting portion of the double-lassel knitted fabric forms a overlapping coating side end portion between the double-lassel knitted fabrics.

In addition, the present invention is the connecting portion of the double-lasel knitted side of each double-lasel knitted fabric in the form of a needle-shaped half of the thickness of one double-lasel knitted side end, the memory form of the half of the other double-lassel knitted side end Provided is a method of constructing an erosion prevention layer having an end portion forming an overlapping coating.

In addition, the present invention is a method of constructing an erosion prevention layer for winding the connection of the double-lassel knitted with a plurality of strong fibers independently for the rigid fixing of the adjacent double-lassel knitting in the form that the side end portion between the double-lasel knitted fabric abuts. To provide.

In addition, the present invention provides a construction method of the erosion prevention layer to be fixed by driving with a fixed needle in the form of a deformed with the pin.

In addition, the present invention is the double-lasel knitted fabric, the upper layer of the network; A lower layer of the network located below the upper layer; It provides a method of constructing an erosion prevention layer comprising a; and an intermediate layer woven to connect the upper layer and the lower layer to each other in a form inclined in one direction.

In addition, the present invention provides a construction method of the erosion prevention layer is a structure in which the mesh is a hexagonal meshing.

In addition, the present invention provides a method for constructing the erosion prevention layer of the inclined angle of 45 to 85 ° in the acute angle relative to the lower layer.

In addition, the present invention provides a construction method of the erosion prevention layer having a height of 10 to 100mm to the intermediate layer.

As described above, the double-lasel knitted fabric constructed by the method of the present invention has the effect of preventing erosion as well as environmental conservation in the form of vegetation on the ground while maintaining the uprightness without inhibiting the elongation of the root and stem of the plant.

In addition, the construction method of forming the erosion prevention layer of the present invention has the effect of strengthening the connection strength between the double-lassel knit fabric by setting the shape of the connection portion for connecting a plurality of double-lassel knit fabric or winding the connection between the knitted fabric with a strong fiber have.

In addition, the construction method of forming the erosion prevention layer of the present invention has the effect of providing stability of the construction because the fixedness is increased and the cost is reduced only by the use of a release needle, and is also constructed by a simple method.

In addition, the construction method of the present invention has the effect of stably fixing so as not to move even in the movement of the flow rate by stacking the corrosion-resistant iron plate on the top in order to finish the double-lassel knitting when the construction ground end is concrete.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. First of all, it should be noted that in the drawings, the same components or parts denote the same reference numerals as much as possible. In describing the present invention, detailed descriptions of related well-known functions or configurations are omitted in order not to obscure the subject matter of the present invention.

As used herein, the terms "about", "substantially", and the like, are used at, or in close proximity to, numerical values when manufacturing and material tolerances inherent in the meanings indicated are intended to aid the understanding of the invention. Accurate or absolute figures are used to assist in the prevention of unfair use by unscrupulous infringers.

1 is a construction process chart for forming an erosion prevention layer according to an embodiment of the present invention. Referring to Figure 1, the construction process of forming the erosion prevention layer of the present invention can be completed through the ground stop step S100, double laselle knitted coating step S200, fixing step S300, filling step S400, and vegetation step S500.

First, in the ground stop step S100, a step of forming a ditch at the distal end of the construction surface of the river or bank and stopping the remaining construction surface to form a stop surface; can proceed. Here, the stop (정지 地) can be defined as the smooth and even ground to ground.

The upstream or downstream side of the stream or bank will be dug into the ground for end-treatment to fix the double-lassel knit described later. Since the double-lasel knitted fabric is finished in the trench formed by digging the ground, the double-lasel knitted fabric can be prevented from being lifted or moved by the flow rate and can be firmly fixed.

The stop surface is connected to a plurality of double-lassel knitted fabric to cover the stop surface; the double-lasel knitted coating step S200 may be performed.

Thereafter, as the fixing step S300, by fixing a plurality of fixing pins to the end and the connecting portion of the coated double cell knitted fabric, and fixing the double cell knitted fabric to the stop surface; can be proceeded.

In order to fix the double-lassel knitted fabric coated on the stationary multi-layer stationary ground so as not to be shaken at the flow rate, the fixing pin is driven to the overlapping coating portion in which the double-lassel knitted fabric is superimposed and fixed to the ground.

In the fixing, a deformed needle in the form of a needle can be embedded in the ground for easy treatment. Simply putting the release needle can be firmly fixed to the change of the flow rate.

The fixing pin can be simply processed by driving a deformed needle pin in the form of a depression. Simply putting the release needle pin can be firmly fixed to the change of the flow rate.

FIG. 2A is a cross-sectional view of a double-lassel knitted fabric provided on a stop surface formed with a ditch at an end according to an exemplary embodiment of the present invention. FIG. Referring to Figure 2a, the form 20 in which the end of the present invention is double-celled knitted fabric on the concrete stop surface is dug a groove 21 in the construction ground to form a stop surface 23, the double-lassel knitted fabric on the top of the stop surface 25 is a form diagram installed in the formed groove. Afterwards, the fixing pin 27 is inserted into the connection part, and the erosion prevention layer of the present invention is formed through the cover 29 and the vegetation 31. Therefore, the phenomenon that the double-lassel knitted fabric fixed to the groove 21 is moved by the flow rate distribution 10 can be prevented.

Figure 2b is a shape diagram of a stop surface formed with a groove according to an embodiment of the present invention. Referring to FIG. 2B, the stop ground in which the groove 21 of FIG. 2A is formed is illustrated.

Figure 2c is an enlarged view of the form fixed to the double-lassel knitted fabric in the ditch according to an embodiment of the present invention. That is, in the form shown in an enlarged portion of FIG. 2C of FIG. 2A, the double-lasel knitted fabric 25 is installed in the groove 21 at the end of the erosion prevention layer, and may include end treatment fixed to the fixing pin 27.

3 is a cross-sectional view of the double-lassel knitted fabric is placed on the end of the concrete stop surface according to another embodiment of the present invention. Referring to Figure 3, the end treatment of the concrete surface of the present invention can be constructed in the case of the construction end is concrete instead of the ditch of the stop surface and forms the following configuration. Form 30 in which the end of the present invention is laid on the stationary surface of the concrete surface double raschel knitted fabric is a concrete surface 33, the anti-corrosion iron plate 35 to cover and fix the upper portion so that the double rassel knitted fabric installed on the upper portion of the concrete surface does not move Double raschel knitted fabric 25 fixed between the concrete surface and the corrosion-resistant steel plate, anchor pin 37 for fixing the corrosion-resistant steel plate and double-lassel fabric from the concrete surface to the construction surface nut fixing the end of the anchor pin 39.

In the case where the end portion of the construction surface is concrete, the corrosion prevention iron plate such as stainless is laminated on the upper part of the concrete surface, and the anchor pin pins the hole to the concrete surface where the corrosion prevention iron plate is laminated, and then anchors the anchor. Lift the pin and the perforated corrosion-resistant steel plate, and then anchor the anchor pin to the hole of the perforated concrete surface so that 1/5 to 2/5 of the total anchor pin length protrudes, and the double anchoring knitted fabric is caught on the protruding anchor pin. Cover the concrete surface with a double-lassel knit fabric, and then cover the double-lassel knit fabric so that the hole of the anti-corrosion iron plate perforated on the coated double-lassel knit fabric fits into the anchor pin, and then protrudes into the hole of the anti-corrugated steel sheet. Can be terminated by tightening the anchor pin with a nut.

On the other hand, the present invention in connecting the plurality of double-lassel knitting to lay the upper portion of the stop ground, the connection portion is as follows.

Figures 4a to 4c is a side cross-sectional view of the double-lassel knit inter-linking portion in accordance with a preferred embodiment of the present invention. Figure 4a is a form in which the connecting portion (a) of the double-lasel knitted fabric, the side end portion between the double-lassel knitted fabric forms an overlapping coating. As the double-lassel knitted fabric is overlapped and covered and fixed on the stop ground, the tight binding between the double-lassel knitted fabric can be made without a gap in the connection portion.

형태를 이룬 하나의 더블라셀 편물 측단부와, 측단부 말단으로부터 중첩되고자 하는 길이까지 만큼 측단부의 전체 두께를 기준으로 아래쪽에서 측단부 두께가 절반 감소되어

형태를 이룬 또 하나의 더블라셀 편물 측단부가 중첩되되, 각 측단부의 두께가 절반 감소된 부분이 중첩되어

형태를 이룬다. 4B shows the side of each double-lassel knit fabric in which the connecting portion (b) of the double-lassel knit fabric is in the form of a needle-shaped half-thickness of one double-lasel knitted side end, and in the form of a half-thicker half-thickness of the other double-lasel knitted side end. The end forms the overlapping coating. 4b, the side end thickness is reduced by half based on the total thickness of the side end portion from the side end end of the double-lassel knit to the length to be overlapped.

The thickness of one side of the double-lassel knitted side end and the side end portion of the side end portion were reduced by half based on the total thickness of the side end portion from the side end portion to the length to be overlapped.

Another double-lassel knitted side end of the shape overlaps, and the half-thickness of each side end overlaps,

Form.

4c is a form in which the connection part c of the double-lassel knit fabric is wound around the plurality of strong fibers 28 independently for tight fixing between adjacent double-lassel knit fabrics in a form in which side end portions between the double-lassel knit fabrics are in contact with each other.

Figure 4d is a plan view of a form in which the double-lassel knitted fabrics adjacent to each other in a plane in accordance with a preferred embodiment of the present invention by winding with a strong fiber. Referring to FIG. 4D, the form 500 in which the double-lassel knitted fabric of the present invention is wound and fixed by the strong fiber is formed to include the double-lassel knitted fabric 510,530, the connection part 550, and the strong fiber 570. A plurality of strong fibers 570 are independently wound on the connection part 550 between the double-lassel knitted fabrics 510 and 530 adjacent to each other, thereby firmly fixing the connection.

The planar shape of the erosion prevention layer is formed by connecting a plurality of double-lasel knitted fabric, the connection method, the construction method of the erosion-proof layer to be wound around a plurality of strong fibers independently fixed to secure the adjacent double-lassel knitted fabrics to provide. The fixed form as described above has a high connection strength between double-lassel knits and is not separated even at a strong flow rate.

5A is a perspective view of a double raschel knitwear according to one preferred embodiment of the present invention. Referring to FIG. 5A, the double-lasel knitted fabric 100 of the present invention has a three-dimensional structure including an upper layer 110, a lower layer 130, and an intermediate layer 150.

The double cell knitted fabric, the upper layer 110 of the network; A lower layer 130 having a network located below the upper layer; It is preferable that it is a three-layered three-dimensional structure comprising a; intermediate layer 150 connecting the upper and lower layers to each other in a form inclined in one direction.

The meshes of the upper layer 110 and the lower layer 130 have a hexagonal interlocking structure, so that deformation of the shape is small, thereby ensuring stability. In addition, the vegetation is possible after filling the filling in the inner space of the network during the construction of the erosion prevention layer.

5B is a side perspective view of a double raschel knitted fabric in accordance with a preferred embodiment of the present invention. Referring to FIG. 5B, the side surface of the double cell knitted fabric of the present invention may include an upper layer 110, a lower layer 130, and an intermediate layer 150. In addition, the intermediate layer 150 is connected between the upper layer and the lower layer connecting the connecting company, the upper layer hexagon 111 and the lower layer hexagon 133 of the upper layer 110, the upper layer hexagon 113 is connected to the lower layer hexagon 133 in the form of connecting the yarn diagonal. It is preferable to connect obliquely to achieve.

Due to the inclined form of the connecting yarn 150, when the double laselle knitted fabric of the present invention is applied to the river or the embankment, when the construction is inclined in the opposite direction of the flow of the stream, the filling yarn is filled in the connecting yarn part of the intermediate layer 150. Plants are resisted by strong flow rates, so that the role of erosion prevention can be smoothly maintained while maintaining the flow of the stream stably without being affected by the flow rate.

Here, the 150 of the intermediate layer is preferably inclined angle of 45 to 85 ° in the acute direction relative to the lower layer 130. When the inclination angle α is less than 45 °, the connecting yarn is inclined so that it is difficult to accumulate the fillings, and when it exceeds 85 °, the connecting yarn approaches the vertical and is double due to the strong flow rate in a certain direction. Erosion may be lowered because it is difficult to maintain the uprightness of the vegetation planted in the raschel knitted fabric, and there is a fear that the packing material may escape.

In addition, the intermediate layer 150 provides 10 to 100mm in height between the upper layer 110 and the lower layer 130. If the height is less than 10mm, the elongation of the roots and stems of the vegetated plant is inhibited and the uprightness is not provided, and the erosion can not be prevented due to the flow rate. Not only is this difficult, but the vegetated grass is covered with a fiber band and exposed to the outside, and the plant cannot exert its erosion ability.

The double-lassel knitted fabric in which the connecting yarn is inclined is provided with cushioning by an intermediate layer, and when pressure is applied to both the upper and lower layers of the fiber band, the connecting yarn is compressed while being inclined in one direction to provide cushioning. The double laselle knit can be made by known knitting methods that provide cushioning to the fabric.

Filling step S400 after the fixing step, the step of filling the soil containing sand or soil in the fixed double-lassel knitted fabric; may be proceeded. At this time, the filling may be applied to the top of the double-lasel knitted fabric.

Vegetation on the top of the filled soil; Vegetation step S500 is in progress can be completed the erosion prevention layer of the present invention. Therefore, the erosion prevention layer of the present invention is used to fill the pores of the double-lasel knitted air and then vegetation by herbaceous plants, the roots and stems of the vegetated plants through the soil in the voids of the present invention It extends to the ground under the double-lassel knit fabric. For this reason, the double-lasel knitting of the present invention does not seem to laminate a separate fibrous sheet, but becomes a shape like a plant vegetated in the soil. In addition, it is fixed with a release needle pin does not rise even if the flow rate is high. In addition, the roots and stems of the vegetated plants are fixed to the middle layer of the double-lasel knitting of the present invention. Therefore, when the stream flows through the double-lassel knitted fabric of the present invention, the double-lasel knitted fabric becomes resistant to reduce the flow velocity near the ground surface coated with the three-dimensional fiber of the present invention, and the flow velocity is prevented from being transferred to the earth and sand constituting the ground surface. Can be reduced to prevent erosion.

6 is a cross-sectional view of the anti-erosion layer constructed in accordance with a preferred embodiment of the present invention. Referring to FIG. 6, the erosion prevention layer 300 of the present invention may include a ground layer 310, a double-lasel knitted layer 330, and a plant layer 350. The roots of the plant layer 350 grow on the double-lasel knitted layer 330 and are planted firmly. The flow rate distribution 10 can be prevented from being eroded by rapidly decreasing the flow rate due to the double-lasel knitted layer 330 of the pre-designed thickness of the present invention near the surface.

The present invention described above is not limited by the accompanying drawings, and various substitutions, modifications, and changes are possible within the scope without departing from the technical spirit of the present invention. It will be apparent to those who have it.

1 is a construction process of forming an erosion prevention layer according to an embodiment of the present invention.

Figure 2a is a cross-sectional view of the double-lassel knit fabric is installed on the stop surface formed with a groove in the end according to a preferred embodiment of the present invention.

Figure 2b is a shape diagram of a stop surface formed with a groove according to an embodiment of the present invention.

Figure 2c is an enlarged view of the form fixed to the double-lassel knitted fabric in the ditch according to an embodiment of the present invention.

3 is a cross-sectional view of the double-lassel knitted fabric is installed on the end of the concrete stop surface according to another embodiment of the present invention.

Figures 4a to 4c is a side cross-sectional view of the double-lassel knit inter-linking portion according to an embodiment of the present invention.

4d is a plan view of winding double-lassel knitted fabrics adjacent to each other in a plane in accordance with a preferred embodiment of the present invention by winding a strong fiber.

5A is a perspective view of a double-lassel knit fabric in accordance with one preferred embodiment of the present invention.

Figure 5b is a side perspective view of a double cell knitted fabric according to an embodiment of the present invention.

Figure 6 is a cross-sectional view of the anti-erosion layer constructed in accordance with a preferred embodiment of the present invention.

<Description of Major Symbols in Drawing>

10: velocity distribution

20: The form in which the double-lassel knit fabric was laid on the stationary surface with the end of the groove

21: ditch, 23: stationary surface,

25: stop surface, 27: holding pin,

29: cover, 31: vegetation

30: Double-lassel knit fabric is installed on the stationary surface of the concrete end

33: concrete surface, 35: corrosion resistant steel sheet

37: anchor pin, 39: nut

100: double laselle knit, 110: top layer,

130: lower layer, 150: middle layer,

111: upper layer hexagon, 133: lower layer hexagon,

300: erosion prevention layer, 310: ground layer,

330: double laselle knit layer, 350: plant layer

500: Formed by winding double-lassel knit with strong fibers

510, 530: double laselle knit, 550: connection,

570: strong fiber

Claims (18)

In the construction method of forming an erosion prevention layer, Forming a ditch at the distal end of the construction surface, and stopping the remaining construction surface to form a stop surface; An upper layer on the stationary surface; A lower layer of the network located below the upper layer; And an intermediate layer in which a plurality of connecting yarns are woven in such a manner as to be inclined in one direction to connect the upper and lower layers to and from each other, wherein the connecting yarns have an inclination angle of 45 to 85 ° with respect to the lower layer. Connecting a plurality of coatings; Fixing a double cell knitted fabric to a stationary surface by driving a plurality of fixing pins at the end and the connection part of the coated double cell knitted fabric; Filling sand or soil in the intermediate layer of the fixed double-lassel knit fabric; Covering the top of the double-lassel knitted fabric filled with sand or soil; And Vegetation to prevent erosion in the covered area; Construction method of the erosion prevention layer comprising a. The method of claim 1, The connecting portion of the double-lasel knitted fabric is a method of constructing an erosion prevention layer is a side end portion between the double-lasel knitted fabric forming an overlapping coating. The method of claim 2, The connecting portion of the double-lasel knitted fabric has a half-sided thickness reduced by half from the upper side of the double-lassel knitted fabric from the side end of the double-lassel knitted fabric to the length to be overlapped.

The thickness of one side of the double-lassel knitted side end and the side end portion of the side end portion were reduced by half based on the total thickness of the side end portion from the side end portion to the length to be overlapped.

Another double-lassel knitted side end of the shape overlaps, and the half-thickness of each side end overlaps,

Construction method of erosion prevention layer forming a form. The method of claim 1, The connecting portion of the double-lasel knitted fabric is a method of construction of the erosion prevention layer to be wound around a plurality of strong fibers independently for the rigid fixing of the adjacent double-lasel knitted fabric in the form of the side end portion between the double-lasel knitted fabric. The method of claim 1, The fixing pin is a method of construction of the erosion prevention layer is fixed by driving with a deformed needle pin in the form of a depressed. delete The method of claim 1, The network is a construction method of the erosion prevention layer is a hexagonal interlocking structure. delete The method of claim 1, The intermediate layer is a construction method of the erosion prevention layer having a height of 10 to 100mm. In the construction method of forming an erosion prevention layer having a concrete surface at the end portion, Driving the anchor pin to the top of the concrete surface, which is a distal end of the construction surface, so that 1/5 to 2/5 of the total anchor pin length protrudes, and stopping the construction surface other than concrete to form a stationary surface; Coating an end portion of the double laselle knitted fabric to the anchor pin protruding from the upper portion of the concrete surface, and connecting and covering the upper portion of the entire surface from the concrete surface to the stationary ground with a plurality of double laselle knitted fabrics; On the upper end of the double-lassel knitted fabric coated on the concrete surface, a corrosion-resistant steel plate having a hole into which the protruding anchor pins can be stacked is laminated, and the anchor pin protruding from the upper portion of the laminated corrosion-resistant steel plate is tightened with a nut. Fixing the distal end of the double-lassel knitted fabric coated on the upper surface to the concrete surface, and fixing the double-lassel knitted fabric to the stationary surface by driving a plurality of fixing pins at the connection portion of the coated double-lassel knitted fabric; Filling soil including sand or soil in the fixed double-lassel knit fabric; And Vegetation on top of the filled soil; Construction method of the erosion prevention layer comprising a. The method of claim 10, The connecting portion of the double-lasel knitted fabric is a method of constructing an erosion prevention layer is a side end portion between the double-lasel knitted fabric forming an overlapping coating. The method of claim 11, The connecting portion of the double-lasel knitted fabric has a half-sided thickness reduced by half from the upper side of the double-lassel knitted fabric from the side end of the double-lassel knitted fabric to the length to be overlapped.

The thickness of one side of the double-lassel knitted side end and the side end portion of the side end portion were reduced by half based on the total thickness of the side end portion from the side end portion to the length to be overlapped.

Another double-lassel knitted side end of the shape overlaps, and the half-thickness of each side end overlaps,

Construction method of erosion prevention layer forming a form . The method of claim 10, The connecting portion of the double-lasel knitted fabric is a method of construction of the erosion prevention layer to be wound around a plurality of strong fibers independently for the rigid fixing of the adjacent double-lasel knitted fabric in the form of the side end portion between the double-lasel knitted fabric. The method of claim 10, The fixing pin is a method of construction of the erosion prevention layer is fixed by driving with a deformed needle pin in the form of a depressed. The method according to any one of claims 10 to 13, The double laselle knitted fabric, Upper layer of reticular; A lower layer of the network located below the upper layer; And An intermediate layer in which a plurality of connecting yarns are woven to connect the upper and lower layers to and from each other in an inclined form in one direction; Construction method of the erosion prevention layer comprising a. The method of claim 15, The network is a construction method of the erosion prevention layer is a hexagonal interlocking structure. The method of claim 15, The connecting yarn construction method of the erosion prevention layer having an inclination angle of 45 to 85 ° in the acute direction relative to the lower layer. The method of claim 15, The intermediate layer is a construction method of the erosion prevention layer having a height of 10 to 100mm.

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