KR20100023734A - Structure of invisible drainage - Google Patents

Abstract

PURPOSE: A structure of invisible drainage is provided to secure the inflow of rain without clogging of a drain by preventing the inflow of the nonpoint contaminant to the drain. CONSTITUTION: A structure of invisible drainage comprises a waterway body(1), an elastic layer(6), a permeable layer(5) and an upper pressure support stand(3). The waterway body has open top. The elastic layer is formed on the lower part of an upper reinforcement grid(8). The permeable layer is formed on the lower part of the elastic layer. The upper pressure support stand is formed on the lower part of a rubble layer.

Description

Structure of invisible drainage for nonpoint source management

The present invention provides a drainage system with a closed non-exposure to induce a total drainage and to prevent the residual rainwater from accumulating and to prevent clogging due to the inflow of pollutants into the drainage, which is a disadvantage of the current partially open drainage. The present invention relates to a non-exposed drainage structure for nonpoint source management that prevents and restores blockage of the permeable structure.

The present invention is an environment-friendly water-permeable elastic packaging structure and construction method of Patent No. 10-0497565 registered by the applicant, and Application No. 10-2008-0065870 reinforcing mat combined with a perforated pipe structure and a construction method, and its application method No. 10-2008-0082284 No-exhaust drainage pipe and cleaning manhole, Application No. 10-2008-0120222 Non-point source treatment drainage pipe using porous elastic packaging material and cleaning manhole was based on.

The water drainage phenomenon occurs after the rain in the existing drainage or side drains of the existing drainage roads, and the rainwater overflows when a sudden heavy rain falls due to the clogging of the drainage drain due to falling leaves or various wastes and other factors.

As a result, the cleaning and dredging caused by the various wastes flowing through the drainage should be periodically performed. Therefore, it is difficult to maintain the clean state all the time.In addition, the inflow of the streams increases the pollution of the rivers and destroys the river ecosystem, It is the result of horde death.

In addition, the water that could not fall into the drainage rots and smells, providing a habitat for pests, which requires periodic disinfection.

Since the drains are made of iron or similar materials, the sports ground is a cause of safety accidents.

As described above, the present invention should solve the risks caused by the elimination of hazards, the loss of the drainage path due to the habitat of pests, the introduction of waste, the inflow of streams of pollutants, and the cleaning and dredging due to the installation of the drainage. This is a problem.

In addition, the current drain pipe or the sump is used to finish the steel grating on the top or using a lid made of cement, if there are fallen leaves or dirt on the top, it is difficult to put rainwater to block the upper hole of the drain.

In the meantime, the water quality preservation policy focused on point pollution sources such as the installation of sewage treatment in urban areas and the imposition of industrial waste water treatment. However, it is necessary to develop new management measures for nonpoint sources because there is a limit to the improvement of water quality through only point pollution management.

As non-point sources occur in urban areas with the continuous development of urban areas, it is important to manage nonpoint sources in urban areas.

Conventional non-point source control methods are mostly post-collection management rather than non-point source discharge sites, and have low design rainfall intensity values, making it difficult to control non-point sources when the design rainfall intensity is higher.

In Korea, rainfall is concentrated in summer, and the concentration of rainfall is increasing in comparison with other countries. In recent years, the concentration of rainfall in the summer is intensifying.

In addition, overall application is difficult in urban areas where there are many impervious surfaces and less free space for the management of nonpoint sources, and it requires a lot of installation and maintenance costs.

As such, the existing non-point source control in urban areas is difficult to manage non-point source in urban areas because most of the non-point source management is mostly due to cost, limitation of facility installation space, and limitation of facility capacity, rather than overall non-point source management.

As such, the existing non-point source control in urban areas is difficult to manage non-point source in urban areas because most of the non-point source management is mostly due to cost, limitation of facility installation space, and limitation of facility capacity, rather than overall non-point source management.

Accordingly, it has a high treatment capacity to treat the stormwater runoff in the whole city, easy to connect with the existing stormwater runoff collection system, does not require other installation space, economical nonpoint source control method is required.

In addition, the existing drains are blocked with fallen leaves or non-point sources, so that the drains are cleaned before the rainy season starts, so that the drains can be smoothly drained.

In order to solve the problems listed above, the present invention is a method for inducing continuous permeation to form a certain thickness of the elastic layer on the top to block pore blockage due to elasticity and maximize the voids of the permeable layer to reach the permeable layer of fine solids It was to be able to maintain the air gap by guiding the discharge to the hole installed in the lower part of the road.

Water drainage on the road due to rainfall and the drainage capacity of the drains are limited, thereby improving simultaneous drainage, preventing water pooling during rainfall, and improving the existing drainage paths to non-exposed types, and not to the exposed type. The fine water discharged through the rainwater pipe and passed through the primary manure can be accumulated in the sump to clean the sump to maintain the optimum drainage.

It is intended to guide the surface water into the drainage channel using perforated pipes without exposing the drainage channels.The structure of the perforated pipes is maintained so that the permeation layer voids are continuously maintained due to the upper pressure and rainwater delivered from the elastic packing material at the surface layer, and the rainwater penetrates into the lower drainage pipe. Semi-circular structure was used to increase the strength of the pipe.

Therefore, it is to provide a non-exposed drainage structure for non-point source management that prevents clogging of drains and drains rainwater smoothly into the drain pipe, prevents inflow of non-point pollutant sources, and ensures continuous inflow of rainwater without clogging drains.

In addition, the surface layer has elasticity, so it is easy to remove particulate matters even at a small top impact, so that the permeable pores are continuously maintained to solve the clogging phenomenon, and non-point pollutants contained in the rainfall effluent flowing out of the impermeable layer in the urban area. It will be an effective method for the management of nonpoint sources in urban areas by removing them from the porous elastic layer to prevent the inflow of nonpoint sources to the pipelines and rivers.

As described above, when the drainage is poorly cleaned, temporary rainfall may cause inconvenience to traffic and cause an accident.

The primary problem is that the drainage clogging phenomenon and rainwater pollution are first removed to ensure that only rainwater is discharged into the stream, thereby protecting the stream from the non-point pollution source.

Second, the second problem is to solve the problem of securing the drainage capacity of the existing drain by using a closed drain, which is not an open type such that the lower part is visible like the current drain.

Third, it is not uncommon to see permeation voids occluded even after a few months after construction of permeable packaging materials.

This blockage is a phenomenon in which the permeable part of the permeable packaging material is not elastic, and when a fine material such as a nonpoint source is deposited in the permeable pore to block the permeable hole, the pore blockage is aggravated by the pressure of the upper part or other pressure, which prevents the permeable hole from being restored. In this case, it is possible to smoothly remove the non-point source by solving the pore blockage of the permeable hole.

Although many studies have been conducted to prevent the inflow of nonpoint source into the river, it has been used a mechanical device that can treat a small amount of rainwater, and the processing limit of the mechanical device is only 5mm / hr. Although the reality is less than the present invention, the present invention can easily handle 100mm / hr of rainfall and its efficiency can also be as efficient as conventional machinery.

In order to achieve the above object, the non-exposed drainage structure for non-point source management according to the present invention includes an open drain pipe body, an elastic layer formed under the upper reinforcing grid, a permeable layer formed under the elastic layer, and It is formed to include an upper pressure support provided below the crushed stone layer.

An upper reinforcing grid covering the upper part of the drain pipe body;

Further comprising an elastic chip filled in the upper reinforcing grid, the body is to provide a traction means for facilitating transport, and a jaw for supporting the upper pressure support.

The body may further include a joint groove provided at both ends of the longitudinal direction, and a joint member inserted into the joint groove, wherein the elastic layer is composed of an elastic chip mixed with a binder, and the permeable layer is crushed stone. Or may be made of charcoal, cork and palm fibers mixed with a binder.

The upper pressure support further includes a hole to allow drainage to be easily drained.

In addition, the non-exposed drainage structure according to the present invention has a through hole communicating with the drain pipe body and an opening formed in the upper portion, a cover covering the opening, a drain pipe receiving step for receiving the drain pipe body, and a residue contained in the rain at the inner lower part. The cover is formed to further include a manhole including a collecting portion, the cover is formed to include an upper cover consisting of an elastic chip and a lower cover consisting of a grid.

Rainwater immediately flows into the underground to replenish the water level in the groundwater and discharge residual rainwater through the perforated pipes to restrain the dirt from entering the drainage, which can get rid of the cause of odors and pests from dredging or poor drainage. Even if it was down, there was no dirt in the drain, so the blockage of the drain was minimized.

By preventing the inflow of nonpoint sources of rainfall, the river ecosystem can be protected from the initial rainfall, and cleanliness can be maintained without periodic cleaning and dredging.

The most important thing is to install drainages that are not exposed to the road's roadsides alongside the roads, thereby relieving the load of drainage when rainwater is drained through the current drainage, eliminating water traps on the roadway, thereby reducing traffic accidents and driving in rainy weather. It can provide the optimal condition for the government, reducing social costs of accidents and protecting valuable lives.

In addition, it is necessary to establish a separate bicycle road to extinguish the bicycle population that is gradually spreading by removing the drainage channel exposed to the ground. In addition, since the bicycle passes all the way over the drain, the air gap in the upper part of the drain can always be maintained smoothly, so that no additional cleaning or securing the drainage gap is required.

In addition, the lack of exposed drainage allows multi-use facilities, such as sports grounds, to provide a space to prevent injuries and exercise in peace.

In this way, it eliminates the risks of the playground and the problem of drainage, prevents the loss of drainage role due to the pollution of the river, the habitat of pests, and the input of the waste, and impedes the efficient use of the site by installing the drainage smoothly. When various problems are solved and the average 10m road occupies 8-12% of the area of the shoulder, the present invention can maximize the efficiency of land use and can easily manage.

The above and other objects and novel features of the present invention will become more apparent from the description and the accompanying drawings.

In the present invention, the rainwater is constantly introduced through the shoulder formed by the pitched drainage channel so that there are no water pools on the shoulder and the drainage port of the shoulder can be used for other purposes, so that the land can be used efficiently as well as the source of pollution due to rainwater. In order to prevent inflow, to eliminate the inconvenience, and to reduce maintenance costs, drainage can be made continuously and smoothly in the construction of playgrounds, roads, and roads in complexes.

The practice of the present invention preferably uses a U-shaped or circular drainage channel in the shape of the towing means 11 and the upper reinforcing grid 8 using materials such as cement or HDPE or FRP. Create (see Figure 1); The upper pressure support 3 is made of cement, high-strength plastic or HEP or cast iron or coated steel, and FRP therein to form a drainage passage to facilitate the flow of rainwater at the bottom; Forming a water permeable layer 5 made of crushed stone or the like on the upper pressure support 3; Compacting the crushed stone to prevent it from turning off and stabilizing the crushed stone by spraying or mixing the urethane binder on top of the crushed stone; An elastic layer 6 is formed by mixing 5-7 mm of elastic chips with a binder on top; The upper reinforcing grid 8 as shown in FIG. 2 is placed on the elastic chip 6 filled with the binder in accordance with the size of the drainage path; Fill the empty space of the reinforcing grid with the elastic chip 10 so that the rainwater can easily flow into the drain pipe. At this time, the upper pressure support (3) is made of semicircular or middle parts so that rainwater flowing from the upper portion easily enters the drainage. The hole 31 is formed to enter so that the rainwater can be easily introduced into the lower drain without load due to the upper pressure support 3.

The upper reinforcing grid 8 may be fixed to the drainage body 1 using the fastening groove 7. And, in the fixed position to cover the finish 4 to maintain the surface flatness.

The elastic chip forming the elastic layer 6 is made of fine porosity, water is easily removed and non-point pollutants contained in the rainfall effluent flowing out of the impermeable layer in the urban area are removed from the porous elastic layer to the non-point pollutant material into the pipeline and the river. The structure prevents the inflow of water into the drainage pipe, and when the fine non-point source blocks the pores of the pores, the elastic layer itself is elastic even with a small upper impact. It will be a way to effectively manage nonpoint source pollution in urban areas by resolving void clogging.

In addition, by forming a crushed stone on the upper pressure support (3), the pressure applied to the surface layer is relaxed through the crushed stone and the elastic layer (6) and transmitted to the upper pressure support (3) so that the upper pressure support (3) to the upper pressure It allows the entire drainage to withstand the upper load and provides a good structure to form an elastic layer (6) acting as a primary strainer of the non-point source of inflow through rainwater on the top of the crushed stone.

In order to fix the upper support, the upper upper end of the U-shaped drainage can be installed to be 10-20 mm wider than the lower end to give the jaw 2 so that the upper pressure support 3 can be hooked to the jaw 2.

6 and 7, the drainage structure according to the present invention can be connected to each other by forming a joint hole 32 in the drainage body 1 and through the drain pipe fitting member 33 inserted therein. have.

In order to purify the water quality or to effectively remove the primary manure of nonpoint source, charcoal is mixed with a binder instead of crushed stone and installed in the upper part of the upper support, and the cork, charcoal, and palm fiber are filled in the upper part of the rainwater to penetrate the upper part. After adsorbing the first, the rubber chip with a thickness of 20mm on top of it and the voltage of 100kg weight for 5-10 seconds; Install the upper reinforcement grid 8; In the space of the upper reinforcing grid 8, a chip made of 4-7 mm rubber (SBR), cork, urethane and EPDM is mixed with a urethane binder to fill the water.

The upper elastic layer 6 had 5-7 mm of particles to keep the permeable voids sufficiently and a permeability coefficient of 10 × 10 ^{−1 so} that the road surface rainwater was promptly led to the lower perforated tube.

In addition, by installing the drain with elasticity in the upper part, the rainwater is led to the drain pipe through the drainage part to protect against the danger and contamination of the exposed drainage path, and to install the drain pipe with the drainage hole in the permeable layer and the lower part of the groundwater by introducing the rainwater into the soil. It can help boost your stomach and nourish and moisturize soil vegetation.

Even if there is a material that obstructs drainage, such as fallen leaves, the surface is roughly formed, so there is little blockage of the surface and rainwater floats dirt, such as fallen leaves, from the upper part of the drainage so that the drainage can proceed smoothly to the lower part. To realize a smooth drainage.

The elastic layer 6 is installed in such a way as to prevent the clogging of the lower permeable layer 5, to absorb the impact of the upper part and to maintain the voids of other structures in the surface layer, and to maximize the voids in the most important permeable and drainage portions. In order to stabilize the surface by using a binder and crush the upper part to stabilize the surface by using a binder to stabilize the permeable layer and stabilize the permeable layer once more with the upper elastic chip, It is installed to have a smooth drainage performance without water accumulation on the surface even at the 200-year rainfall of 100mm / hr.

The numerical value calculated can be expressed as follows.

A) thickness and permeability coefficient

1.Elastic layer: t = 7cm. k = 7cm / sec

2.Permeable layer: t = 20cm, k = 50cm / sec

B) rainfall intensity

I = 100 mm / hr (200-year frequency probability rainfall in Daejeon province)

C) Review of vertical penetration during rainfall.

When it rains with a rainfall intensity of 100 mm / hr.

100mm / hr = 10cm / 3600sec = 0.00278cm / sec

Since the permeability of the elastic layer is 7 cm / sec

k = 7cm / sec. and the rainfall rate is 0.00278cm / sec, so no surface drainage occurs.

1. Rainfall per unit area.

10 cm / 60 min × 1.0 m × 15.0 m = 0.25 cm / min.

2. Examine the excellent drainage capacity through the permeable layer at a unit area of 15m × 1m.

(Condition: perforation 60cm * 1m)

1. The amount of rain falling per unit width.

    Q = 100mm / hr × 1.0m × 15.0m

      = 10cm / 3600sec × 100cm × 1500cm = 417 / sec

2. Good exclusion per unit width.

    q = kiA

      = 7cm / sec × 1 × 100cm × 60cm = 42000 / sec

      q = kiA = 42000 / sec. Q = 417 / sec

      q ＞ Q

The problem caused by current rainfall is solved.

For reference, the flow of the fluid according to the permeability coefficient is shown in Table 1 below.

Representative Permeability of Saturated Soil K Types of soil cm / sec ft / min Clean pebbles 100-1.0 200-2.0 Coarse sand 1.0-0.01 2.0-0.02 Fine grain sand 0.01-0.001 0.02-0.002 Silty clay 0.001-0.00001 0.002-0.00002 clay <0.000001 <0.000002

Table 2 shows the treatment efficiency of the device-type treatment facility, and Table 3 shows the results of testing the removal of non-point pollutants contained in rainfall effluent such as SS, BOD, and COD using porous packaging on the surface. Although the design strength is superior to that of each technology, the removal efficiency is comparable to that of the device type treatment facility.

 Processing technology  Design Rainfall Strength (mm / hr)  Removal efficiency (%) SS BOD COD M-Filter 5 80 67 - Stormfilter 5 80 67 - Capillary infiltration trench method 80-95 60-90 - Double Flow Purification 80-90 60-90 - Surface sand filtration (irrigation method) 5 70-90 60-85 - Sand filter 5 80 - 55 Stormsys 5 98 93.4 - Feeding device 5 35 - 5 Stormceptor 5 73-83 - 26

 Technology  Design Rainfall Strength (mm / hr)  Removal efficiency (%) SS BOD COD  Invention  100  85  25  47

In view of these results, it is possible to remove the nonpoint source by using porous elastic packaging material for the management of the nonpoint source and to prevent the clogging of drains due to dirt.

The principle of preventing this clogging is that when rainwater enters the drainage pipe through the pores of the porous elastic layer, the water in the upper part of the porous elastic layer temporarily leaves fallen leaves or other contaminants, so that water flows in the upper part of the porous elastic layer and in the middle of the fallen leaves or contaminants. The pores of the porous elastic layer can easily enter the drain.

In addition, as described above, when the small grains of the nonpoint source contaminated with pores block the pores of the porous elastic packaging material, even if a small impact is applied from the top, the pore occlusion is eliminated, so that the water permeates smoothly.

Through the drain pipe using the elastic layer 6 of the non-exposed drainage structure according to the present invention, a fine nonpoint source that reaches the manhole 30 is settled in the lower part of the cleaning manhole 30 and the clean rainwater is discharged into the river through the drainage channel. By preventing the contamination and inhaling only the residue from the cleaning manhole 30 can be easily removed pollution source can be made non-point source management.

10-20 mm larger than the external dimension of the drain pipe to which the drain pipe jaw 42 is to be connected, as shown in FIG. 3, in cement or HDPE or FRP in manufacturing the manhole 30 for cleaning the drainage channel. To facilitate the connection with the drainage passage, and the through-hole 44 communicates with the drainage pipe, and makes a collecting portion 41 to collect the residue in the lower part of the manhole 30, and collects the particulates introduced through the drainage pipe and vacuum cleaner. The center should be made deepest so that it can be easily removed. In addition, for the convenience of construction by making the traction means 43 on both sides to make the construction using the machine convenient.

In addition, the upper part of the manhole 30 is preferably provided with a double cover, the lower cover is made of steel to withstand the pressure of the upper portion, and the upper cover is preferably made of a material using elastic material and the grid By making the structure that can be permeated with elastic chips, the pollutant is blocked and only rainwater is injected into the bottom of the sump.

The manhole 30 can be installed one by one in 20 ~ 30 meters along the length of the non-exposed drainage.

The non-exposed drainage structure according to the present invention can be easily applied to a bicycle road. (See FIGS. 8 and 9.) The water-permeable bicycle road makes one wall of the drainage path 200-300 mm lower than the other, and the drainage guide plate for the bicycle road. Connect with 51 to fill crushed stone on top and stabilize the crushed stone with urethane binder; Placing the elastic chip on the top by mixing with a urethane binder; The upper reinforcement grid is installed on the upper part, and the space of the upper reinforcement grid is finished with the elastic chip for surface finishing, and the upper reinforcement grid support jaw 52 is formed, so that the bicycle can pass over the finishing layer to use the land. It is installed so that the gap of elastic chip can be maintained continuously by the pressure applied when the bicycle passes without additional management.

In the case of a bicycle path, the substructure can be installed and it can be installed on site from crushed stone to surface finish.

On the other hand, Figure 10 is a perspective view showing another embodiment of the non-exposed drainage structure according to the present invention. The principle for a smooth pitcher is the same, but shows another example that can be used by modifying the laminated structure.

In this embodiment, the iron grating 105 is positioned below, the iron grating 105 is filled with an elastic chip, and the jaw 107 is provided to be seated on the drainage body 109.

The upper part of the iron grating 105 allows the porous elastic packaging material to enter the lower portion of the drain pipe at a lower portion of 8-12 cm to form an elastic layer, and to maintain the overall shape by making the grooves 106 having a "c" shape on both sides. do.

A 5-7 mm porous elastic packing material 102 formed on the iron grating 105 filled with the “c” shaped groove 106 and the porous elastic packing material is formed to be 2-5 cm below the upper part of the drainage, and the porous layer for the surface layer is formed on the upper surface layer. Finish with an elastic packaging material (101).

In addition, both sides or one side of the drain pipe to make a connection hole 103 in the middle to be connected to other existing drain pipe and tow on both sides to install the traction ring 108 to be able to work.

In this case, the porous elastic packaging material is used by punching the chip form or the board form having elasticity, and the chip form is mixed with the binder to adjust the surface strength and water permeability by the amount of the binder according to the use place.

For the strength of the surface, it is possible to increase the strength so that the vehicle can pass the low surface friction strength when finishing with the chip by using the board-shaped porous elastic packaging material, and the chip can also control the strength by controlling the amount of binder. It can increase.

As mentioned above, although the invention made by this inventor was demonstrated concretely according to the said Example, this invention is not limited to the said Example and can be variously changed in the range which does not deviate from the summary.

Rainwater pitchers are closely related to the environment and play a large role in natural ecosystems.

Due to the permeation of rainwater and the inflow of rivers into the city's non-point source, the pollution of the rivers is becoming serious. Therefore, the developed countries are spared a lot of cost and effort in the management of non-point source. to be.

The present invention solves this existing problem to block the pollutant from the primary drainage to prevent the inflow into the river to filter the pollutants contained in the initial rainwater, thereby reducing the cost of pollutant treatment and eliminating the drainage exposed to the ground As a result, it is possible to use land more efficiently and to play a greater role in preventing safety accidents.

In addition, by improving the side of the road to the present invention to install the bicycle road has the advantage of maximizing the use of land, which saves enormous budget to be invested in the land price according to the opening of the bicycle road and prevents water pooling in the road side area even in rain Can be used as a way to bring life into the ecosystem by designing it to flow underground.

1 is a perspective view according to an embodiment of the non-exposed drainage structure according to the present invention.

Figure 2 is a perspective view of the upper reinforcement grid of the unexposed drainage structure according to the present invention.

Figure 3 is a perspective view according to one embodiment of the cleaning manhole of the non-exposed drainage structure according to the present invention.

4 is a perspective view showing an aspect in which the cover is coupled to the manhole of FIG.

Figure 5 is a cross-sectional view and side view according to an embodiment of the upper pressure support of the non-exposed drainage structure according to the present invention.

6 is a view showing an embodiment of a joint hole formed in the drain pipe body of the non-exposed drainage structure according to the present invention.

7 is a perspective view of a drain pipe joint member inserted into the joint hole;

8 is a cross-sectional view of a bicycle road to which the non-exposed drainage structure according to the present invention is applied.

9 is a perspective view of the drainage guide plate for the bicycle road is installed on the bicycle road.

10 is a perspective view according to another embodiment of the non-exposed drainage structure according to the present invention.

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

1. Drainage body 2. Upper pressure support mounting jaw

3. Upper pressure support 4. Finishing member

5. Permeable layer

6. Lower elastic layer 7. Upper reinforcement grid fastening groove

8. Upper reinforcement grid 10. Upper elastic chip

11. Towing means 20. Manhole cover

21. Iron grid 22. Elastic chip

30. Manhole 31. Upper pressure support drain hole

32. Joint groove 41. Collector

42. Drain pipe receiving jaw 43. Traction means

44. Manhole throughhole 51. Bike drainage guide plate

52. Upper Reinforcement Grid Support Jaw

53. Hole for joining upper reinforcement grid support jaw

Claims (10)

Drain pipe body with open top, An elastic layer formed on an inner upper portion of the drain pipe body; A permeable layer formed under the elastic layer, and And an upper pressure support provided under the water permeable layer. The method of claim 1, An upper reinforcing grid covering the upper part of the drain pipe body; Unexposed drainage structure, characterized in that it further comprises an elastic chip filled in the upper reinforcing grid. The method of claim 1, The body further comprises a towing means for facilitating carrying, and a jaw for supporting the upper pressure support structure. The method of claim 1, The body and the joint grooves provided at both ends in the longitudinal direction, The non-exposed drainage structure further comprises a joint member inserted into the joint groove. The method of claim 1, The elastic layer is made of an elastic chip mixed with a binder, The water permeable layer is a non-exposed drainage structure, characterized in that consisting of crushed stone, or a mixture of charcoal, cork and palm fibers. The method of claim 1, The upper pressure support is a non-exposed drainage structure, characterized in that it further comprises a hole to facilitate drainage. 7. The method according to any one of claims 1 to 6, An opening formed in the through hole and an upper portion communicating with the drain pipe body; A cover covering the opening, A drain pipe receiving step for receiving the drain pipe body; The non-exposed drainage structure further comprises a manhole including a collecting portion collecting the residue contained in the rain in the inner lower portion. The method of claim 7, wherein The cover is a non-exposed drainage structure, characterized in that it comprises an upper cover consisting of an elastic chip and a lower cover consisting of a grid. Drain pipe body with open top, It is seated inside the drain pipe body, and the iron grating filled with a porous elastic packaging material, Unexposed drainage structure, characterized in that it comprises a porous elastic packaging material layer formed on the iron grating. A drain pipe body whose upper part is opened and one side wall is lower than the other side wall, A drain guide plate having a support jaw and connected to one lower sidewall of the drain pipe body; A permeable layer formed from an upper portion of the drain guide plate to an inner upper portion of the drain pipe body; An elastic layer formed on the permeable layer, An upper reinforcing grid positioned on the elastic layer and filled with an elastic chip; And an upper pressure support provided on the inner side of the drain pipe body as a lower portion of the water permeable layer.

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