KR102651453B1 - Composite geo cell and ground reinforcement system - Google Patents

Abstract

A composite geocell is provided that improves drainage performance and effectively prevents loss of fill material. One embodiment of the present invention includes a geocell frame including an overlapping portion in which a plurality of sheets are partially overlapped and arranged in a zigzag shape; And a nonwoven fabric disposed on at least one side of the geocell frame; It provides a composite geocell, wherein a filling space is formed between each sheet, and the geocell frame and the non-woven fabric are made of the same material.

Description

Composite geocell and ground reinforcement system including the same {COMPOSITE GEO CELL AND GROUND REINFORCEMENT SYSTEM}

The present invention relates to composite geocells, and more specifically, to composite geocells and ground reinforcement systems including the same.

In general, concrete revetment blocks and vegetation blocks have traditionally been widely used as a means of preserving the landscape and preventing subsidence around roads or river slopes, but these are not environmentally friendly because they are made of concrete. It was difficult to manufacture, and due to the high load, it required a lot of manpower and equipment to transport and install. Therefore, in order to compensate for the shortcomings of such concrete revetment blocks or vegetation blocks, honeycomb-shaped vegetation-type slope reinforcement materials, that is, geocells, have been developed and used.

In general, geocells have a predetermined width up and down and are made up of a plurality of long, thin sheets that overlap each other. That is, the side portions where each sheet is in contact with each other are joined at regular intervals, and the joints (joining positions) are formed in a zigzag pattern, resulting in a plurality of filling spaces being formed alternately between each sheet. These geocells are installed on the slopes of rivers or roads, and each filling space is filled with vegetative soil and plant seeds are planted in the vegetative soil. As plants grow within this filling space, the cohesion of the vegetative soil is strengthened by the roots and stems of the plants, thereby improving the reinforcing function.

Meanwhile, geocells have the characteristic of holes being formed on the surface through a punching process. When the filling space of a geocell is filled with gravel, there is a low possibility that the gravel will be lost due to holes formed on the surface, but as the supply of gravel has become significantly insufficient in the industry, vegetative soil such as silt has been filled instead of gravel. However, because the particle size of vegetated soil is small compared to gravel, there was a problem in that plant seeds or fine particles useful for plant growth contained in the vegetated soil were lost due to holes formed on the surface of the geocell.

The purpose of the present invention is to provide a composite geocell that can effectively prevent loss of fill material while improving drainage performance.

Another object of the present invention is to provide a composite geocell that facilitates plant growth by enhancing the cohesion of the filler.

Another object of the present invention is to provide a method of manufacturing a composite geocell that can easily attach a nonwoven fabric to a geocell frame.

Another object of the present invention is to provide a ground reinforcement system including the composite geocell.

The objects of the present invention are not limited to the objects mentioned above, and other objects and advantages of the present invention that are not mentioned can be understood by the following description and will be more clearly understood by the examples of the present invention. Additionally, it will be readily apparent that the objects and advantages of the present invention can be realized by means and combinations thereof as set forth in the claims.

One embodiment of the present invention for achieving the above object includes a geocell frame including an overlapping portion in which a plurality of sheets are partially overlapped and arranged in a zigzag shape; And a nonwoven fabric disposed on at least one side of the geocell frame; It provides a composite geocell, wherein a filling space is formed between each sheet, and the geocell frame and the non-woven fabric are made of the same material.

Specifically, the geocell frame and the nonwoven fabric may include the same synthetic resin. The synthetic resin may be any one selected from the group consisting of polyethylene terephthalate (PET), polyethylene, polypropylene, polyimide resin, and combinations thereof.

According to one embodiment of the present invention, the nonwoven fabric may be arranged side by side on the inner side of each sheet, or may be arranged side by side on the outer side of each sheet.

According to another embodiment of the present invention, the nonwoven fabric may be disposed on both sides of the plurality of sheets, including the inner and outer surfaces.

According to another embodiment of the present invention, the nonwoven fabric may be a short fiber nonwoven fabric or a long fiber nonwoven fabric, and specifically, it may be a short fiber nonwoven fabric.

Specifically, the thickness of each fiber strand constituting the nonwoven fabric may be 2 to 20 denier.

According to another embodiment of the present invention, the surface of the geocell frame may include holes.

According to another embodiment of the present invention, the nonwoven fabric may be attached to the geocell frame by any method selected from the group consisting of a bond method, a heat welding method, and a combination thereof.

Another embodiment of the present invention for achieving the above object is the composite geocell placed on the ground; A soil layer containing vegetative soil filled in the filling space of the composite geocell; And it is possible to provide a ground reinforcement system including a vegetation mat disposed on the soil layer.

The means for solving the above problems do not enumerate all the features of the present invention. The various features of the present invention and its advantages and effects can be understood in more detail by referring to the specific examples below.

According to one aspect of the present invention, it is possible to provide a composite geocell that improves drainage performance and at the same time effectively prevents fine particles contained in the filler from being lost. When a ground reinforcement system is implemented using these composite geocells, it is possible to allow plantings such as grass to grow well, and to prevent soil and sand runoff even when water flow rapidly increases due to heavy rain, etc. It can protect all sides of your back.

In addition to the above-described effects, specific effects of the present invention are described below while explaining specific details for carrying out the invention.

1 is a front view of a composite geocell according to an embodiment of the present invention.
Figure 2 is an enlarged plan view of portion A of Figure 1 according to an embodiment of the present invention.
Figure 3 is an enlarged plan view of portion A of Figure 1 according to another embodiment of the present invention.
Figure 4 is an enlarged plan view of portion A of Figure 1 according to another embodiment of the present invention.

Hereinafter, each configuration of the present invention will be described in more detail so that those skilled in the art can easily implement it. However, this is only an example, and the scope of rights of the present invention is determined by the following contents. Not limited.

1. Composite geocell

One embodiment of the present invention includes a geocell frame including an overlapping portion in which a plurality of sheets are partially overlapped and arranged in a zigzag shape; and a non-woven fabric disposed on at least one side of the geocell frame, wherein a filling space is formed between each sheet, and the geocell frame and the non-woven fabric are made of the same material. .

When the filling space of a typical geocell is filled with gravel, there is a low possibility that the gravel will be lost due to holes formed on the surface. However, as the supply of gravel has become significantly insufficient in the industry, vegetative soil such as silt has been filled instead of gravel. However, because the particle size of vegetated soil is smaller than that of gravel, there was a problem in that fine particles that could be useful for the growth of plants contained in vegetated soil were lost due to the holes formed on the surface of the geocell. According to one aspect of the present invention, by disposing a nonwoven fabric on at least one side of the geocell frame, drainage performance can be improved and at the same time, fine particles useful for plant growth contained in the vegetation soil can be effectively prevented from being lost.

On the other hand, in the absence of non-woven fabric, the water contained in the vegetation soil was not absorbed into the geocell frame, which does not contain pores, and water was released only through the holes formed on the surface of the geocell frame. Accordingly, when the drainage performance of geocells was low, a problem occurred where the ground caved in. According to another aspect of the present invention, since the nonwoven fabric includes pores inside or on the surface, the water contained in the vegetation soil is absorbed into the pores, and as a result, the amount of water discharged through the pores formed on the surface of the geocell frame is reduced. It can be raised. According to another aspect of the present invention, the geocell frame and the nonwoven fabric are made of the same material, thereby significantly increasing the adhesion between the geocell frame and the nonwoven fabric. Accordingly, drainage performance can be improved and at the same time, the loss of fine particles useful for plant growth can be effectively prevented.

Hereinafter, the configuration of the present invention will be described in more detail with reference to FIG. 1.

Referring to FIG. 1, in this specification, the first direction (D1) may be a lateral direction of the composite geocell 100, and the second direction (D2) may be a direction that intersects the first direction (D1). , the third direction D3 may be a direction that intersects the first and second directions D1 and D2. For example, the first direction D1 may be the inner side direction based on one unit sheet forming the geocell frame 10, and the direction opposite to the first direction may be the outer side direction. .

The composite geocell 100 according to the present invention includes a geocell frame 10 and a nonwoven fabric 20.

The geocell frame 10 according to the present invention is a composite geocell frame that can increase the strength and bearing capacity of the ground. Since the geocell frame is a three-dimensional structure, when the inside of the geocell frame is filled with filler, the filler acts in the form of a slab to realize a load distribution effect, not only restrains displacement in the vertical direction, but also increases ground bearing capacity. It can be improved.

The geocell frame 10 includes an overlapping portion 15 in which a plurality of sheets are partially overlapped and arranged in a zigzag shape. Partially overlapping the plurality of sheets means that the front surfaces of each sheet do not overlap. For example, it may mean that only a portion of one side of each sheet overlaps, and the overlapping portions are spaced apart from each other. and can be deployed.

The geocell frame 10 may define a filling space 30 formed between each sheet. Specifically, the filling space 30 may be filled with fillers such as soil and gravel to reinforce the ground.

The geocell frame 10 may include, for example, synthetic resin, specifically thermoplastic plastic resin, and more specifically polyethylene terephthalate (PET), polyethylene (Polyethylene). ), polypropylene, polyimide resin, and combinations thereof.

The nonwoven fabric 20 according to the present invention can improve the drainage performance contained in the filler filled in the filling space 30 by including voids on the inside or on the surface, and at the same time effectively prevent the fine particles contained in the filler from being lost. can do.

The geocell frame 10 and the nonwoven fabric 20 according to the present invention are made of the same material. That is, the geocell frame 10 and the nonwoven fabric 20 may include the same synthetic resin, and specifically, the same thermoplastic resin. For example, the thermoplastic resin may be any one selected from the group consisting of polyethylene terephthalate (PET), polyethylene, polypropylene, polyimide resin, and combinations thereof.

If the geocell frame and the non-woven fabric are made of different materials, the adhesion between the geocell frame and the non-woven fabric may decrease, making it difficult to manufacture composite geocells, or the non-woven fabric may separate during the construction process of the composite geocell, resulting in poor construction problems. In addition, when the geocell frame and nonwoven fabric are made of the same material, the melting point of the resin is the same, so the nonwoven fabric does not burn and adheres well to the geocell frame in the ultrasonic or thermal welding method used in the process of attaching the geocell frame and nonwoven fabric. It can be.

The nonwoven fabric according to the present invention may be a short fiber nonwoven fabric or a long fiber nonwoven fabric, and may specifically be a short fiber nonwoven fabric. The short-fiber nonwoven fabric has a simple manufacturing process and can provide the advantage of significantly reducing costs compared to long-fiber nonwoven fabric, and can achieve a level of drainage efficiency equivalent to that of long-fiber nonwoven fabric.

For example, the length of one fiber strand constituting the short fiber nonwoven fabric may be 45 to 75 mm, the thickness may be 5 to 20 denier, and specifically 6 to 15 denier, More specifically, it may be 6 to 12 denier. If the length and thickness of one fiber strand constituting the short fiber nonwoven fabric are less than the above numerical range, the pores of the short fiber nonwoven fabric may increase, causing a problem of fine particles of soil flowing in or out more than the normal value, and if the numerical range exceeds the above numerical range. In this case, the pores of the short-fiber nonwoven fabric may decrease, causing the fine particles of soil to flow in or be lost below normal levels, causing clogging.

For example, the length of one fiber strand constituting the long fiber nonwoven fabric may be 1,000 m or more, and the thickness of each fiber strand may be 2 to 7 denier, specifically 3 to 6 denier, , more specifically, it may be 4 to 5 denier. If the length and thickness of one fiber strand constituting the long fiber nonwoven fabric are less than the above numerical range, the number of pores in the long fiber nonwoven fabric may increase, causing a problem of fine particles of soil flowing in or being lost more than the normal value, and if it exceeds the above numerical range. As the pores of the long-fiber nonwoven fabric decrease, fine particles of soil and sand may flow in or be lost below normal levels, causing clogging.

The tensile strength and suture strength of the nonwoven fabric 20 according to an embodiment of the present invention may be 250N or more in both warp (length) and weft (width) directions based on test standard KS K 0743:2016, CRE, and grab method, The tensile elongation of the non-woven fabric (20) may be more than 50% in both the warp (length) and weft (width) directions based on test method KS K 0743:2016, CRE, and the grab method, and the vertical permeability coefficient of the non-woven fabric (20) is Test method KS K ISO 11058:2011, hydrostatic head method standard a (1 or more) Х 10 ^-1 cm/s or less. When the physical properties of the nonwoven fabric satisfy the above standards, the durability of the composite geocell can be sufficiently secured during the construction process and excellent drainage performance can be achieved.

For example, the thickness of the nonwoven fabric 20 may be 0.1 to 3.0 mm, specifically 0.2 to 2.0 mm, and more specifically 0.3 to 1.5 mm. When the thickness of the nonwoven fabric 20 satisfies the above numerical range, the drainage performance of the nonwoven fabric and the performance of preventing loss of fine particles contained in the filler can be achieved simultaneously. The thickness of the nonwoven fabric 20 may be, for example, a thickness in the first direction D1.

For example, the basis weight of the nonwoven fabric 20 may be 150 to 500 g/m ² , specifically 200 to 400 g/m ² , and more specifically, It may be 220 to 350 g/m ² . When the basis weight of the nonwoven fabric satisfies the above numerical range, the drainage performance of the nonwoven fabric and the ability to prevent loss of fine particles contained in the filler can be achieved simultaneously.

According to another embodiment of the present invention, the surface of the geocell frame 10 may include a hole (h). Water contained in the filler can be effectively discharged through the hole. For example, the shape of the hole may be circular or polygonal, and the diameter of the hole may be 1 to 4 cm. Additionally, one or more holes (h) may be formed on the surface of the geocell frame 10.

The nonwoven fabric 20 according to the present invention is disposed on at least one side of the geocell frame 10.

Figure 2 is an enlarged plan view of portion A of Figure 1 according to an embodiment of the present invention.

Figure 3 is an enlarged plan view of portion A of Figure 1 according to another embodiment of the present invention.

Referring to Figures 2 and 3, according to one embodiment of the present invention, the nonwoven fabric 20 is arranged side by side on the inner surface (10is) of each sheet, or is arranged on the outer surface (10os) of each sheet. They may be placed side by side on the sheet, and specifically, they may be placed on the inner side of each sheet. When a non-woven fabric is placed on the inner surface of each sheet, the water contained in the filler is absorbed into the pores of the non-woven fabric, thereby further improving drainage performance and effectively preventing ground subsidence, as well as fine particles contained in the filler. loss can be effectively prevented.

Figure 4 is an enlarged plan view of portion A of Figure 1 according to another embodiment of the present invention.

Referring to FIG. 4, according to another embodiment of the present invention, the nonwoven fabric 20 may be disposed on both sides of the plurality of sheets, including the inner surface 10is and the outer surface 10os. By disposing the nonwoven fabric 20 on both sides of the plurality of sheets, loss of fine particles contained in the filler can be more effectively prevented.

The nonwoven fabric may be attached to the geocell frame by any method selected from the group consisting of a bond method, a heat welding method, and a combination thereof. Descriptions related to the manufacturing method will be described in detail later.

2. Manufacturing method of composite geocell

The method of manufacturing a composite geocell according to the present invention may include the step of attaching a geocell frame and a nonwoven fabric.

According to one embodiment of the present invention, an ultrasonic heat welding method may be used to partially overlap a plurality of sheets. By partially overlapping the plurality of sheets at regular intervals using an ultrasonic heat welding method, overlapping portions arranged in a zigzag shape may be provided.

According to one embodiment of the present invention, any one method selected from the group consisting of a bond method, a heat welding method, and a combination thereof may be used as a method of attaching the geocell frame and the nonwoven fabric, and specifically, an ultrasonic welding method. can be used. By using the ultrasonic welding method, the adhesion between the geocell frame and the nonwoven fabric can be further increased, effectively preventing the nonwoven fabric from separating.

The bonding method includes applying an adhesive resin to a nonwoven fabric and then combining the nonwoven fabric coated with the adhesive resin with a geocell frame to produce a preliminary composite geocell; Drying the preliminary composite geocell with hot air; And it may include the step of compressing the dried preliminary composite geocell. For example, the adhesive resin may include an epoxy resin or an acrylic resin commonly used in the relevant technical field. Additionally, a hot air dryer that dries at 110 to 150°C for 10 to 20 seconds can be used as a means to dry the preliminary composite geocell. According to another embodiment of the present invention, the preliminary composite geocell may move in a zigzag manner within the hot air dryer, and thus the residence time of the preliminary composite geocell within the hot air dryer increases, thereby further increasing drying efficiency. It can get higher. As a method for pressing the dried preliminary composite geocell, a conventional press device in the relevant technical field can be used.

The ultrasonic welding method may be a method of attaching a nonwoven fabric and a geocell frame using heat generated by waves with a high frequency. As a means to implement the ultrasonic welding method, an ultrasonic welder commonly used in the relevant technical field can be used. The ultrasonic welding method has a strong welding state and can further increase the attachment efficiency of the nonwoven fabric to the geocell frame without deforming the composite geocell. Specifically, the ultrasonic welder may include an ultrasonic generator that converts an externally provided electrical signal of AC 200 to 240 V into an electrical signal of 20 kHz or higher.

3. Ground reinforcement system

Another embodiment of the present invention can provide a ground reinforcement system including the composite geocell. The above-described parts and repeated explanations will be briefly explained or omitted.

The ground reinforcement system according to the present invention includes composite geocells; soil layer; And it may include a vegetation mat.

The composite geocell according to the present invention can be placed on the ground. Specifically, the ground may be, for example, ground including a non-sloping surface or ground including a sloped surface, and may specifically be ground including a sloped surface. In ground containing slopes, composite geocells can more effectively prevent the loss of fine particles contained in the filler material filled in the filling space of the composite geocell.

The soil layer according to the present invention may include vegetated soil filled in the filling space of the composite geocell. The vegetated soil can act in the form of a slab to implement a load dispersion effect, restrain vertical displacement, and improve ground bearing capacity.

A vegetation mat according to an embodiment of the present invention includes a first non-woven fabric on which seeds are located on the surface or inside and liquid fertilizer is applied; and a soil loss prevention layer disposed on the upper surface of the first non-woven fabric and including a filling mat layer made of vegetable fibers and a coir net layer in a net shape; Includes.

Specifically, the weight per unit area of the first nonwoven fabric may be 100 to 300 g/m ² and can be appropriately adjusted depending on the slope of the slope and the flow speed of the river. If the weight of the first non-woven fabric is less than 100 g per 1 m ² , soil outflow cannot be adequately prevented, and if it exceeds 300 g, soil can be protected, but the non-woven fabric is formed thick enough to prevent seeds from taking root properly. Uncontrollable problems may arise. In addition, the seeds can be placed at 20 to 25 g per 1 m ² of the first nonwoven fabric, and can be appropriately adjusted depending on the slope of the slope and the flow speed of the river. However, if the seeds are present in amounts of less than 20 g per 1 m ² of the first nonwoven fabric, the density of plantings grown from the seeds may be small, which may cause a problem of slope loss due to soil runoff, and exceeding 25 g may occur. If it exists, problems may arise where the growth of the plant is reduced and the plant does not grow well. Meanwhile, the first nonwoven fabric may include polyester resin, cotton, jute, or vegetable fiber extracted from coconut, or a mixture thereof. In particular, vegetable fiber extracted from jute or coconut is a natural material and can decompose in the ground after the construction of a vegetation mat.

Specifically, the filling mat layer may be made of vegetable fibers such as rice straw, coconut fiber, hemp, and bamboo. The filling mat layer maintains the shape of the vegetation mat for slope protection. The filling mat layer maintains the shape of the vegetation mat before it is installed on the slopes of rivers, roads, railways, etc. and facilitates transportation. Additionally, the filling mat layer serves to prevent seeds located on the surface or inside the nonwoven fabric from leaking out. According to another embodiment of the present invention, the filling mat layer may be formed of a biodegradable fiber material in addition to vegetable fiber. The filling mat layer may be made of aliphatic polyester-based biodegradable fibers, aliphatic/aromatic copolyester-based biodegradable fibers, or a mixture of these biodegradable fibers, which have a slower biodegradation rate than vegetable fibers.

Specifically, the coir net layer may be made of the same vegetable fiber or biodegradable fiber as the filled mat layer, and may be formed in a net shape. By being located on top of the filling mat layer, the coir net layer can serve as a cushioning material to firmly support the lower layers and absorb shock. In addition, it can prevent plants from being swept into the waterway for a certain period of time until the seeds are rooted in the soil after germination, and when the river overflows and the river flows on the slope, it can slow down the flow speed of the river. You can.

When the vegetation mat according to an embodiment of the present invention is installed on the slope of a river, road, railway, etc., the dried liquid fertilizer is dissolved by water or rainwater after construction of the vegetation mat, helping the germination and growth of seeds. , by allowing plantings such as grass to grow well, preventing soil and sand runoff even when heavy rain occurs and the flow of water rapidly increases, thereby protecting slopes of rivers, roads, railways, etc.

The above seeds may be Geumgye guk, marguerite, and stickyweed in the spring, and in the summer, they may be golden pheasant's leg, water lily, bee yellow, Buddha's flower, mugwort, amaranthus, and dianthus, etc., and in the fall, reeds, mountain chrysanthemum, It may be, but is not limited to, Gujeolcho, layered flowers, moonroot grass, water silver grass, Sukryeong, silver grass, etc., and appropriate seeds can be selectively used depending on the flow speed of the river or the environment or aesthetics of the area.

Typically, fertilizers refer to substances that bring about chemical changes in the soil and substances that affect plants in order to nourish plants or help grow plants. These fertilizers are used as base fertilizer, top fertilizer, manufacturing method, etc. depending on the application method. Depending on the properties, it is classified into granular fertilizer, powder fertilizer, fibrous fertilizer, solid fertilizer, and liquid fertilizer. Depending on the raw material, it is classified into organic fertilizer, inorganic fertilizer, and mineral fertilizer. Depending on the main ingredient, it is divided into simple fertilizer, compound fertilizer, BB fertilizer, and nitrogen fertilizer. , it is classified into phosphate fertilizer, fertilizing fertilizer, and trace element fertilizer; it is also classified into fast-acting fertilizer, slow-release fertilizer, and slow-release fertilizer depending on its effectiveness; it is classified into water supply fertilizer, horticultural fertilizer, and orchard fertilizer depending on its use; and fertilizer process specifications. Accordingly, it is classified into inorganic nitrogen fertilizer, inorganic phosphate fertilizer, inorganic scallop fertilizer, complex fertilizer, organic fertilizer, calcareous fertilizer, siliceous fertilizer, kaolin fertilizer, trace element fertilizer, phosphorus fertilizer, and phosphorus fertilizer. Depending on the by-product, it is classified into compost and rotted husk. , ash, manure residue, side soil, amino acid fermentation by-product fertilizer, dried chicken manure, dried livestock waste, composted rice husk and sawdust, soil microbial agent, and soil activator fertilizer. Liquid fertilizers, which are made of liquid, are made by diluting powdered or granular fertilizers and are also called liquid fertilizers. They mainly belong to the fourth type of complex fertilizer, and in general farms, they are diluted by fermenting perilla seeds, fish cakes, etc. We use chemical fertilizers specifically for liquid fertilizers that are easily soluble in water. In general, liquid fertilizer is a mixture of manure excreted by livestock and leftover feed or bedding that is naturally generated during the process of raising livestock and composted into a liquid state. Compared to compost, it has fast-acting properties like chemical fertilizer and is an organic fertilizer. It has the advantage of having a lasting effect. In the present invention, the application of the liquid fertilizer may be performed by spin coating, dip coating, spray coating, doctor blade, or roll coating, but is not limited to these methods.

According to one aspect of the present invention, by combining a composite geocell and a vegetation mat, the liquid fertilizer helps the germination and growth of seeds, allowing plantings such as grass to grow well, preventing the flow of running water when heavy rain occurs. Even if it increases rapidly, soil outflow can be prevented and slopes of rivers, roads, railways, etc. can be protected.

Although the preferred embodiments of the present invention have been described in detail above, the scope of the present invention is not limited thereto, and various modifications and improvements can be made by those skilled in the art using the basic concept of the present invention defined in the following claims. It falls within the scope of invention rights.

10: Geocell frame
15: overlap
20: Non-woven fabric
30: Filling space
100: Composite geocell

Claims (10)

delete delete delete delete delete delete delete delete delete Composite geocells placed on the ground;
A soil layer containing vegetative soil filled in the filling space of the composite geocell; and
A vegetation mat disposed on the soil layer; Including,
The composite geocell,
A geocell frame including an overlap portion in which a plurality of sheets are partially overlapped and arranged in a zigzag shape; and
Nonwoven fabric disposed on at least one side of the geocell frame; Including,
A filling space is formed between each sheet,
The geocell frame and the nonwoven fabric are made of the same material,
The tensile elongation of the nonwoven fabric is more than 50% in both warp and weft directions based on test method KS K 0743:2016, CRE, and grab method,
The basis weight of the nonwoven fabric is 150 to 500 g/m ² ,
The nonwoven fabric is disposed on both sides of the plurality of sheets, including the inner and outer surfaces,
The geocell frame and the nonwoven fabric include the same synthetic resin,
The geocell frame and the nonwoven fabric are attached by ultrasonic welding through an ultrasonic welder, and the ultrasonic welder includes an ultrasonic generator that converts an electrical signal of AC 200 to 240 V into an electrical signal of 20 kHz or more,
The synthetic resin is any one selected from the group consisting of polyethylene terephthalate (PET), polyethylene, polypropylene, polyimide resin, and combinations thereof,
The nonwoven fabric is a short fiber nonwoven fabric, and one fiber strand constituting the short fiber nonwoven fabric has a length of 45 to 75 mm and a thickness of 5 to 20 denier,
The surface of the geocell frame includes holes,
The vegetation mat,
A first non-woven fabric on which seeds are located on the surface or inside and liquid fertilizer is applied; and
A soil loss prevention layer disposed on the upper surface of the first non-woven fabric and including a filling mat layer made of vegetable fibers and a coir net layer in a net shape; Including,
The weight per unit area of the first nonwoven fabric is 100 to 300 g/m ² ,
Ground reinforcement system.