KR101868769B1 - Constructing method for drainage and reinforce of filled ground in seashore - Google Patents

Abstract

The present invention provides a construction method for drainage and reinforcement of a seaside landfill, capable of stabilizing the landfill in a short time. According to the present invention, the construction method for drainage and reinforcement of a seaside landfill comprises: a bottom pipe installation step of installing a water pump and a recovery pipe on an embankment of the seashore landfill, sinking a plurality of bottom pipes connected to weight bundles in seawater of the landfill to place the same on seabed, and connecting each bottom pipe to the recovery pipe with a connection pipe; a burying step of dumping marine soil on the landfill to form a buried layer; a channel formation step of forming a drain channel with an opened upper side on a surface layer part of the buried layer in order to drain surface water and filling a permeable material in the drain channel; a ground stabilization step of operating the water pump to remove leaching water remaining inside the buried layer through the bottom pipe, and stabilizing the ground by evaporation caused by sunlight and drainage through the drain channel; a soil covering step of forming a soil covering layer with soil, including 30 to 50 weight percent of normal soil, 20 to 30 weight percent of red clay, 5 to 10 weight percent of basic blast furnace slag, 5 to 10 weight percent of basic steelmaking slag, 5 to 10weight percent of fly ash, 1 to 5 weight percent of white charcoal powder, 1 to 5 weight percent of bentonite, 1 to 5 weight percent of colloid silica, and 0.1 to 1.0 weight percent of pine leaf powder, on the surface layer of the buried layer to increase the strength of the ground; a geotextile installation step of deploying and installing permeable geotextile on the soil covering layer; and a banking step of filling soil on the geotextile to form a banking layer.

Description

TECHNICAL FIELD [0001] The present invention relates to a construction method for drainage and reinforcement of a coastal landfill,

The present invention relates to a method for draining and reinforcing a coastal landfill, and more particularly, to a method for draining and replenishing landfill water and leachate at a coastal landfill site capable of rapidly draining the surface water and leachate, securing the running capability of the heavy equipment by reinforcing the ground, Drainage and reinforcement.

In recent years, coastal land has been actively exploited for land development through coastal reclamation as the necessity of construction of coastal industrial complex, residential area, and road has been emphasized. In the past, Santo was mainly used as a landfill material, but since it requires a lot of cost for transportation and material securing from the land, a method of dredging and filling the sea-bed which can be easily obtained from the sea is widely used. This is one of the ways to utilize dredged sea soil as a resource for the purpose of efficient utilization of limited land, insufficient industrial site and securing of route.

As a concrete construction method, a landfill is established on the coast, dredging the sea floor with dredging, and dredging it into the landfill, the sea floor is deposited to the bottom of the landfill to form a buried layer, and the sea water is placed on the buried layer. And the leachate is drained or dried naturally. After that, soft ground improvement work is carried out to secure land land.

Since the sea bed has high shrinkage and compressibility, it has a water content of 200 to 300% even after the completion of the landfill and has no strength of the ground. Therefore, Is difficult to enter.

Therefore, there are various conventional techniques for reinforcing the ground of a coastal landfill.

The most common natural drying method is that it takes a long time due to the characteristics of sea soil that moisture inside the ground can not easily rise to the ground surface. Therefore, it is not possible to undertake soft ground improvement work early and delays development of the site.

There is also a method in which the surface layer of the buried layer is cemented by mixing cement or a chemical solution. However, there is a problem that the construction cost is high, the construction speed is reduced in a large scale construction, and the moisture inside the ground is not dried.

Korean Patent Laid-Open Publication No. 10-2012-0139874 (Dec. 28, 2012)

The present invention has been devised to solve all of the problems described above, and it is an object of the present invention to provide a method for draining and reinforcing a coastal landfill capable of rapidly draining surface water and leachate, securing the running ability of heavy equipment by reinforcing the ground, And to provide a construction method for the building.

In the present invention, a water pump and a recovery pipe are installed on a bank of a coastal landfill, a plurality of bottom pipes connected with weight bundles are disposed in the seawater of the landfill, and the water pipe is connected to the bottom pipe. A bottom piping construction step; A landfill step of dredging the landfill to form a buried layer; A channel forming step of forming a drain channel having an open upper side in the surface layer portion of the buried layer so as to discharge the surface layer water and filling a permeable material inside the drain channel; A ground stabilization step of removing the residual leachate in the buried layer through the bottom pipe by operating the water pump, stabilizing the ground by evaporation by daylight and drainage through the drainage channel; On the surface layer of the buried layer, on the surface layer of the buried layer, 30 to 50% of general soil, 20 to 30% of loess, 5 to 10% of basic blast furnace slag, 5 to 10% of basic steel making slag, 5 to 10% A soil setting step of increasing the strength of the ground by forming a cover layer consisting of 1 to 5% of white coal powder, 1 to 5% of bentonite, 1 to 5% of colloidal silica, and 0.1 to 1.0% of pine tree powder;

A soil step of increasing the strength of the ground by forming a cover layer with cover; A geosynthetic fiber installation step in which a permeable geosynthetic fiber is deployed on a cover layer; And a embankment step of forming a clayey soil layer on the geosynthetics, thereby providing a method for drainage and reinforcement of a coastal landfill.

According to the present invention, it is possible to quickly drain the surface water and the leachate in the ground, to prevent the subsidence of the ground by reinforcing the ground, secure the running ability of the heavy equipment, and stabilize the landfill prematurely, , It is possible to secure the site quickly.

1 is a flowchart of a construction method for drainage and reinforcement of a coastal landfill according to an embodiment of the present invention.
2 is a side view showing a floor piping construction step according to an embodiment of the present invention.
3 is a view showing an embedding step according to an embodiment of the present invention.
4 is a view illustrating a channel forming step according to an embodiment of the present invention.
FIG. 5A is a diagram relating to the removal of leachate in the ground stabilization step according to the embodiment of the present invention, and FIG. 5B is a diagram related to removal of the surface number of the ground stabilization step.
6 is a view showing a configuration of a bottom pipe according to an embodiment of the present invention.
FIG. 7 is a view showing a soil step according to an embodiment of the present invention.
8 is a view illustrating steps of installing geared fibers according to an embodiment of the present invention.
9 is a view showing the construction of geared fiber according to an embodiment of the present invention.
FIG. 10A is a view showing an embankment step according to an embodiment of the present invention, and FIG. 10B is a view showing a ground constructed after embankment.

Hereinafter, with reference to the drawings, specific details for carrying out a construction method for drainage and reinforcement of a coastal landfill according to the present invention will be described in detail with reference to embodiments.

The construction method for drainage and reinforcement of a coastal landfill according to the present invention enables rapid drainage of surface water and leachate, secures the driving ability of heavy equipment by reinforcing the ground, and stabilizes the landfill prematurely. The bottom forming step S10, the embedding step S20, the channel forming step S30, the ground stabilization step S40, the covering step S50, the geosynthetic fiber installation step S60, .

2, the bottom pipe construction step S10 includes installing a water pump 2 on a bank 1 of a landfill 1 on the shore and connecting a return pipe 3 connected to a water pump to a bank 1 A plurality of connecting pipes 4 are connected to each other along the inclined surface on one side of the bank 1a to the lower side of the collecting pipe 3 and a weight bundle 5 And the bottom pipe 10 is dropped using the ship so that the weight of the weight bundle 5 sinks into the seawater of the landfill 1, So that it is placed on the floor.

Referring to FIG. 3, in the embedding step S20, the buried layer 100 is formed by dipping a sea bed in the landfill 1. That is, when the sea soil is poured into the landfill 1, the sea soil is deposited to the lower part of the landfill 1 to form the buried layer 100, and the sea water in the landfill 1 is positioned on the buried layer 100, (Not shown) is formed in the bank 1a or drained using a water pump.

Referring to FIG. 4, the channel forming step S30 may be performed by forming a depression in the upper part 110 of the buried layer 100 so as to discharge the surface layer water remaining in the surface layer part 110, A fine drainage channel 120 is formed and a permeable material 130 such as gravel is filled inside the drainage channel 120 to create a gap between the permeable materials 130. [ The drainage channel (120) filled with the permeable material (130) functions as a pipe to guide the surface layer water remaining in the surface layer (110), so that quick and smooth drainage can be achieved. Since the method of forming the drain channel 120 is well known, a detailed description thereof will be omitted.

5a, the soil stabilization step S40 is performed by moving the water pump 2 installed on the bank 1 a to move the residual water leaking into the buried layer 100 through the bottom pipe 10 installed on the bottom of the landfill 1 The evaporation of the surface water by daylight and the rapid drainage through the drainage channel are performed together to greatly reduce the water content of the sea water so as to stabilize the ground as a whole in the upper part and the lower part of the buried layer 100.

6, the bottom pipe 10 is made of a metal material, and has a plurality of inflow holes 15 formed on an upper surface, a lower surface, and both side surfaces thereof, and has a perforated pipe 11 having a square cross- A plurality of vertical partition walls 11a are formed in the perforated pipe 11 and partitioned into a plurality of compartments 11c to form a passage through which the leachate in the buried layer 100 flows and flows, A plurality of through holes 11b are formed along the longitudinal direction of the partitioning compartments 11a so as to pass between the partitioning compartments 11c so that any one compartment 11c is clogged by the precipitated foreign substances, Even if the drainage is not smooth, water can pass through the through hole 11b and can be drained smoothly through the other compartment 11c.

In addition, since the leachate may contain foreign substances causing corrosion, the perforated pipe 11 may be formed by forming a metal corrosion-resistant sheet 12 on the inner surface, that is, on the wall surface of the vertical partition 11a and the compartment 11c Thereby preventing corrosion of the perforated pipe 11 made of a metal material, thereby increasing durability. The metal corrosion-resistant sheet 12 is also provided with a hole having the same size as the through hole 11b.

The metal corrosion protection sheet (12) comprises 5 to 15 wt% of graphene oxide, 30 to 45 wt% of dimethylformamide, 40 to 55 wt% of tetrahydrofuran, 0.5 to 1.5 wt% of alkyl benzene sulfonate, 0.5 to 1.5% by weight.

Graphite is a structure in which carbon layers are arranged in layers like honeycomb hexagonal nets. One layer of graphite is called graphene, and these graphenes are atoms in which carbon atoms are connected by SP ² bonds, And the carbon atom is a hexagonal structure. Graphene oxide is a plate-shaped carbon material produced by acid treatment of graphite and has many functional groups. The oxidizing groups on the surface generated through the acid treatment process naturally form hydrogen bond with H ₂ O, Lt; / RTI > slurry.

The graphene oxide used in the present invention is obtained by removing slurry and then removing moisture, and is contained in an amount of 5 to 15% by weight. When such graphene oxide is applied, it functions to prevent corrosion of the metal. When the graphene oxide content is less than 5% by weight, the corrosion preventing effect is deteriorated and the coating is not uniformly coated. When the graphene oxide content exceeds 15% by weight, the graphene oxides are aggregated with each other to reduce the corrosion prevention effect by coating. Since the method for producing graphene oxide is already known, its manufacturing method will be omitted.

Further, dimethylformamide and tetrahydrofuran are used as a solvent, and each contains 30 to 45% by weight and 40 to 55% by weight, respectively. These solvents are not well-modified and increase the dispersibility of the graphene oxide. When the content of dimethylformamide is less than 30% by weight, the dispersibility of the graphene oxide may be lowered and the graphene oxides may be aggregated with each other. If the content of dimethylformamide is more than 45% by weight, the graphene oxide concentration may decrease and the coating effect may decrease.

In addition, the alkylbenzenesulfonic acid salt is added in an amount of 0.5 to 1.5% by weight to function as a stable emulsifier, increase dispersibility, and have a rust inhibitive function. The butyl alcohol acrylate is added in an amount of 0.5 to 1.5% by weight to increase the dispersibility of the graphene oxide.

A thermoplastic elastic sheet 13 is attached to the outer surface of the perforated pipe 11 and the thermoplastic elastic sheet 13 is made of a thermoplastic elastomer (TPE) and is often called an elastomer. And is more rigid than plastic, has excellent restoring force, absorbs external impact and pressure well, increases the durability of the perforated pipe (11), and increases the adhesion.

Wherein the thermoplastic elastic sheet 13 comprises 20 to 60% by weight of a polyolefin resin, 30 to 70% by weight of EPM rubber, 0.5 to 2% by weight of carbonylbiscaprolactam, 1 to 5% by weight of tetrahydrofurfuryl methacrylate, 0.5 to 3 wt% of propylene glycol diacrylate, 0.5 to 3 wt% of 1,6-hexanediol diacrylate, 0.5 to 3 wt% of N, N'-m-phenylene dimaleimide, 0.5 to 1.5 wt% of stannic chloride %, p, p'-oxybisbenzenesulfonyl hydrazide 0.1 to 1.0% by weight.

The polyolefin-based resin imparts elasticity and rigidity, and when mixed with EPM rubber, the flowability of the elastomer is improved due to the low viscosity. As such polyolefin-based resins, isotactic polypropylene, ethylene-propylene copolymer and the like can be used. The polyolefin resin is preferably contained in an amount of 20 to 60% by weight. If it is less than 20% by weight, the flowability may be deteriorated. If it exceeds 60% by weight, elasticity and flexibility of the elastomer may be deteriorated, .

The EPM rubber is an ethylene-propylene copolymer rubber, and an ethylene-propylene copolymer rubber can be used. The EPM rubber has elasticity and exhibits elasticity and flexibility. The EPM rubber is preferably contained in an amount of 30 to 70% by weight. If it is less than 30% by weight, elasticity and flexibility of the elastomer may be deteriorated. If it exceeds 70% by weight, heat resistance and flowability may be deteriorated, .

The carbonylbiscaprolactam is added to improve the durability of the thermoplastic elastic sheet 13, and the carbonylbiscaprolactam is preferably contained in an amount of 0.5 to 2% by weight.

Tetrahydrofurfuryl methacrylate is added in an amount of 1 to 5% by weight, and functions as a diluent, thereby enhancing adhesion.

Dipropylene glycol diacrylate and 1,6-hexanediol diacrylate are each included as a crosslinking agent in an amount of 0.5 to 3% by weight, respectively. The molecular sieve may be interconnected to form a polymer, and the crosslinking density may be increased to enhance mechanical properties have.

The N, N'-m-phenylene dimaleimide is contained in an amount of 0.5 to 3% by weight as a crosslinking aid, which is highly reactive so that a rapid crosslinking reaction can take place.

Stannus chloride is contained in an amount of 0.5 to 1.5% by weight, which increases the chemical reaction rate and promotes crosslinking to activate crosslinking.

The p, p'-oxybisbenzenesulfonylhydrazide is contained in an amount of 0.1 to 1.0% by weight and functions as a foaming agent.

The outer surface of the thermoplastic elastic sheet 13 is bonded to the outer surface of the thermoplastic elastic sheet 13 so as to wrap the water-permeable fiber sheet 14. The water-permeable fiber sheet 14 has a property of absorbing moisture or allowing water to pass therethrough. At this time, the perforated pipe 11, the metal corrosion-preventive sheet 12 and the thermoplastic elastic sheet 13 are formed with the plurality of inflow holes 15 communicating with each other. It is preferable that a plurality of such inlet holes 15 are formed in each of the partition compartments 11c.

With this configuration, the water pump 2 is operated, and the leachate contained in the ground of the buried layer 100 is absorbed through the permeable fiber sheet 14 or passed through the fiber sheet 14 to the inflow hole 15, And the leachate introduced into each compartment 11c is converged by the connecting line 4 and rises upward and the leachate passing through each connecting line 4 Is recovered to the recovery pipe (3) and finally discharged. As a result, it is possible to quickly drain the leachate in the ground, so that it is possible to prevent the subsidence of the ground by reinforcing the ground, and to allow early entry of equipment such as construction machines.

In addition, referring to FIG. 5B, the surface layer 110 of the buried layer 100 is stabilized by rapid drainage through the drainage channel 120 together with evaporation by daylight.

7, the covering step S50 is performed on the surface layer 110 in an amount of 30 to 50% of general soil, 20 to 30% of loess, 5 to 10% of basic blast furnace slag, 5 to 10% of basic steel making slag, (200) composed of 5 to 10% of fly ash, 1 to 5% of white coal powder, 1 to 5% of bentonite, 1 to 5% of colloidal silica and 0.1 to 1.0% of pine powder, .

Since the manpower can be accessed through the ground stabilization step (S40) and the small equipment is allowed to enter and travel, the ground surface 110 is covered with small equipment and manpower. The cover layer (200) has a thickness smaller than that of the cover layer (400).

The sinking step S50 may also fill the drainage channel 120 with soil so as to fill the gap between the permeable materials 130 to further strengthen the soft ground.

Conventionally, there has been a problem that transportation and operation are inconvenient because the ground is soft and the drainage channel (120) filled with the permeable material (130) is used as a work path to transport the geotextiles. However, Since the ground is strengthened by further forming the drainage channel 200, it is possible to solve the problem of using only the drainage channel 120 as a work path.

The general soil is the same as the soil used in the embankment layer 400 to be described later, and it is a general soil used in embankment, and 30 to 50% by weight is mixed.

Since most of the grain size of the loess is 0.02 ~ 0.05mm, it contains fine grain particles, filling the gap of the sea bed soil constituting the surface layer (110), it has a porosity and smooth drainage, And has a purification function such as removal of toxins contained in surface waters, excellent air permeability, humidity control ability, and deodorization function, it is beneficial for health and environment in real life after securing a land site by landfill and improvement. When the civil engineering facilities after the embankment are introduced, it contains loess, which is unimportant to the human body, protects the health of the residents, and reduces unpleasant odors, thus enabling a pleasant and safe life.

The blast furnace slag is a slag produced when iron oxide is produced from iron ore in a blast furnace. It contains 5 to 10% by weight of impurities other than iron, and a basic slag having a small particle size and a weight ratio of CaO / SiO ₂ of 1 or more is used.

Steelmaking slag is a slag generated in the steelmaking process. It occurs during the process of removing impurities such as carbon, phosphorus and sulfur by refining pig iron in a converter. It contains useful components such as CaO and SiO ₂ , and contains 5 to 10 wt% And a basic slag having a small particle size and a weight ratio of CaO / SiO ₂ of at least 1 is used.

The above-described basic slag contains basic oxides such as CaO and MgO compared to acidic oxides such as silicic acid (SiO ₂ ) and phosphoric anhydride (P ₂ O ₅ ), and reinforces the strength of the surface layer 110, It is possible to prevent changes in the color of the water due to the low pH generated from the surface water or leachate by removing water from the surface water, thereby preventing aesthetic deterioration and preserving the environment. At this time, 1 to 5% by weight of one or more selected from sodium hydroxide, calcium hydroxide and calcium oxide may be further added to further promote the reaction.

Fly ash is an industrial by-product of a thermal power plant and is collected from the stack, has latent hydraulic characteristics, and contains 5 to 10% by weight to contribute to the development of long-term strength of the surface layer 110.

Charcoal powder is a powder of charcoal made by solid wood such as oak tree as a raw material and progressing carbonization more than charcoal. During the manufacturing process, the bark of charcoal almost disappears and the surface is white because of ash. The carbon content is 90 to 95%, and the ash content is about 2%. The flour is composed of porous structure, contains many minerals, absorbs moisture, contains 1 to 5% by weight, permeates the incoming water, and can be useful for the vegetation of the plant after filling with mineral leaching.

Bentonite is a clay mainly containing montmorillonite, which is a mineral belonging to monoclinic having a crystal structure such as mica, and contains 1 to 5% by weight, thereby stabilizing the soft ground by filling the pores between the sea- have.

Colloidal silica is a silicon by-product of ultrafine particles generated during the production of silicon, and contains 1 to 5% by weight of the colloidal silica to fill the pores between the soot particles, thereby stabilizing the soft ground.

The pine needle powder has deodorant, antiseptic and antimicrobial action, and 0.1 to 1.0% by weight is included, thereby preventing propagation of pests frequently occurring in the landfill (1).

Referring to FIG. 8, in the step of installing geosynthetic fibers (S60), the permeable geosynthetic fibers 300 are deployed on the superficial layer 200 where strength is secured to further reinforce the ground. A plurality of grooves 210 having a rectangular cross section are formed in the cover layer 200 and a part of the expanded geosynthetic fibers 300 is inserted into the groove 210 and the cement 220 ) Can be filled and fixed.

9, the topsheet 310 and the bottomsheet 320 are bonded to each other to strengthen the reinforcement. The topsheet 310 includes a plurality of projections 330 projecting upward And a drain pipe 340 having a plurality of holes formed therein is inserted in the inside of the protrusion 330 to increase drainage force of the surface layer 110.

Referring to FIG. 10A, in the embankment step S70, the embankment layer 400 is formed as shown in FIG. 10B by filling a large amount of the gravel-like material on the geosynthetic fiber 300 using heavy equipment. Greenery may be formed on the embankment layer 400 or construction civil engineering facilities may be constructed.

As a result, the construction method for drainage and reinforcement of the coastal landfill according to the present invention enables quick drainage to surface water and leachate in the ground, prevents ground settlement by reinforcing the ground, secures the running ability of heavy equipment, It is possible to start the improvement work of the soft ground quickly and secure the site quickly.

The present invention is not limited to the above-described embodiments. Anything having substantially the same constitution as the technical idea described in the claims of the present invention and achieving the same operational effect is included in the technical scope of the present invention.

1. Landfill
1a. dike
2. The water pump
3. Recovery piping
4. Connection piping
5. Weight batch
10. Bottom piping
11. All-round pipe
11a. Vertical barrier
11b. Passage
11c. Compartment
12. Metal Corrosion Protection Sheet
13. Thermoplastic elastic sheet
14. Fiber sheet
15. Inlet hole
100. Burying layer
110. Surface layer
120. Drain channel
130. Permeable material
200. Superficial layer
210. Groove
220. Cement
300. Geo-textile
310. Top sheet
320. Lower seat
330. Projection
340. Pipe
400. Clay soil

Claims (7)

A water pipe and a return pipe are installed on the bank of a coastal landfill, and a plurality of bottom pipes connected with weight bundles are placed in the seawater of the landfill to be placed on the floor, and the bottom pipe is connected to the return pipe and each bottom pipe. Construction phase;
A landfill step of dredging the landfill to form a buried layer;
A channel forming step of forming a drain channel having an open upper side in the surface layer portion of the buried layer so as to discharge the surface layer water and filling a permeable material inside the drain channel;
A ground stabilization step of removing the residual leachate in the buried layer through the bottom pipe by operating the water pump, stabilizing the ground by evaporation by daylight and draining through the drainage channel;
The surface layer of the buried layer comprises 30 to 50% of general soil, 20 to 30% of loess, 5 to 10% of basic blast furnace slag, 5 to 10% of basic steel making slag, 5 to 10% of fly ash, 1 to 5% 1 to 5% of bentonite, 1 to 5% of colloidal silica, and 0.1 to 1.0% of pine leaf powder to increase the strength of the ground;
A geosynthetic fiber installation step in which a permeable geosynthetic fiber is deployed on a cover layer; And
A method for drainage and reinforcement of a coastal landfill including embankment forming a clayey layer on top of geosynthetics.
The method according to claim 1,
The bottom pipe includes a plurality of vertical partition walls, a plurality of partition walls formed in parallel to each other, a plurality of through holes formed in the vertical partition walls to pass water between the partition walls, and a rectangular pipe having a square cross section made of a metal material.
A metal corrosion protection sheet formed on the inner surface of the perforated pipe;
A thermoplastic elastic sheet coupled to surround the outer surface of the perforated tube; And
And a water-permeable fiber sheet joined to surround the outer surface of the thermoplastic elastic sheet,
Wherein the perforated pipe, the metal corrosion-resistant sheet, and the thermoplastic elastic sheet are formed with a plurality of inflow holes communicated with each other.
3. The method of claim 2,
Wherein the metal corrosion protection sheet comprises 5 to 15% by weight of graphene oxide, 30 to 45% by weight of dimethylformamide, 40 to 55% by weight of tetrahydrofuran, 0.5 to 1.5% by weight of alkylbenzenesulfonate, 0.5 to 1.5% By weight based on the total weight of the landfill.
3. The method of claim 2,
Wherein the thermoplastic elastic sheet comprises 20 to 60% by weight of a polyolefin resin, 30 to 70% by weight of EPM rubber, 0.5 to 2% by weight of carbonylbiscaprolactam, 1 to 5% by weight of tetrahydrofurfuryl methacrylate, 0.5 to 3% by weight of acrylonitrile, 0.5 to 3% by weight of 1,6-hexanediol diacrylate, 0.5 to 3% by weight of N, N'-m-phenylene dimaleimide, 0.5 to 1.5% by weight of stannic chloride, p and 0.1 to 1.0 wt% of p'-oxybisbenzenesulfonyl hydrazide. The method for drainage and reinforcement of a coastal landfill according to claim 1,
The method according to claim 1,
Wherein the soil filling step also fills the interior of the drainage channel with the soil so as to fill up the gap between the permeable materials.
The method according to claim 1,
Wherein the step of installing the geosynthetics comprises forming a plurality of grooves in the cover layer and inserting a part of the geosynthetic fibers deployed in the grooves, filling the cement with the cement, and fixing the landfill.
The method according to claim 1,
Wherein the topsheet is formed to have a plurality of protrusions protruding upward and having a circular cross section, and a pipe is inserted into the inside of the protrusion, wherein the topsheet and the bottomsheet are bonded to each other. Construction method for reinforcement.

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