KR101853617B1 - The modular infiltration trench for easy maintenance - Google Patents

Abstract

The present invention relates to a modular infiltration trench with easy maintenance, which includes: a pretreatment immersion tank, which is connected to a main waterway through a first inflow pipe to store initial rain water during rainfall; a bypass pipe installed between the main water waterway and the pretreatment immersion tank for returning overflow rain water to the main waterway; and a filter part connected to the pretreatment immersion tank through a second inflow pipe to filter the inflowing rain water, in which the filter part includes a vegetation layer, a filter layer, and a gravel layer. An oil absorption layer is further provided in the pretreatment immersion tank for treating oil contained in the initial rainwater. The vegetation layer is modularized and includes: a plurality of first storage boxes arranged in the horizontal direction and having a grid at a lower portion thereof and a first replacement handle at an upper portion thereof; a vegetable soil filled in the first storage box to form a ground surface; and a first geotextile fiber disposed on a bottom surface of the first storage box to prevent a loss of vegetable soil filled in the first storage box. The filter includes: a plurality of second storage boxes arranged between the first storage box and the gravel layer of the vegetation layer and having a grid at a lower portion thereof and a second replacement handle at an upper portion thereof; a porous medium which is filled inside the second storage box; and a first geotextile fiber disposed on a bottom surface of the second storage box to prevent a loss of the porous media filled in the second storage box and modularized to selectively replace the vegetation layer and the filter layer, which are required to be replaced after the rainfall is finished.

Description

The modular infiltration trench for easy maintenance, which is easy to maintain,

The present invention relates to a modular infiltration trench which can be easily maintained, and more particularly, to a method for treating an oil component contained in an initial rainfall through a modular oil absorption means installed in a pretreatment submergence tank, It is possible to prevent the durability of the filtration part due to the oil component from being lowered and to prevent the secondary environmental damage by preventing the leakage of the oil component drained into the soil, Modular infiltration with ease of maintenance, which facilitates selective replacement, facilitates reasonable and convenient maintenance, and improves the safety of infiltration trenches through the assembly of first and second storages in the vegetation side and the media layer. It is about the ditch.

Generally, pollutants generated in urban areas are classified into point pollution sources and nonpoint pollution sources. Point pollution sources are pollution sources that have a specific discharge route, such as domestic sewage and factory wastewater, where pollution sources can be expressed as a single point. It is relatively easy to treat because of clear route of travel. Nonpoint pollution sources are cities, roads, farmland, It refers to a source of emission of unspecified water pollutants from unspecified sites such as construction sites.

These non-point pollution sources are scattered sources that are difficult to collect because the pollutant outflow and discharge routes are not clearly distinguished, and the amount and amount of emissions are greatly dependent on weather conditions such as rainfall, .

For example, non-point pollutants include soil, nutrients (suspended matter, nitrogen, phosphorus), bacteria and viruses, oil and grease, heavy metals, organic matter, pesticides, and contaminants.

Especially, the early storm that the non - point pollutant leaks out of the ground surface at the early stage of rainfall has a high leakage concentration of non - point pollutants and the possibility of containing poisonous materials such as heavy metals is high in urban areas.

However, it is difficult to collect and treat contaminants such as soil, nutrients, and high concentrations of heavy metals that leach out along with rainfall in nonpoint source pollutants. When they enter the river directly without special treatment, they pollute the water quality, The habitat of the ecosystem is destroyed and the ecosystem is disturbed.

In order to solve this problem, there are currently facilities for reducing non-point pollutants, such as storage type, infiltration type, vegetation type, device type, sewage treatment type, etc. However, Therefore, it is necessary to have an integrated treatment facility that removes non-point pollutants included in rainfall runoff and induces rainwater runoff from non-point pollutants to groundwater in consideration of characteristics of urban areas.

Conventional integrated type treatment facilities are provided with inclined infiltration ditches along the road side, so that the contamination water concentrates at the low point portions, causing the ground to prematurely clog, and the erosion preventing lagoons are not installed in the infiltration ditch, In case of infiltration ditch, the pollutant accumulates at the uppermost part, and the filtration efficiency gradually decreases, so that partial filter media replacement is necessary. However, there is a problem that partial filter media replacement is required.

Meanwhile, in recent years, in order to solve the above problem, there has been developed a "Cartridibmodule penetration ditch pretreatment tank such as Korean Patent Registration No. 10-1656664, a cartridge module chamber infiltration ditch filtration apparatus using the same, Respectively.

KR-10-1656664 (2016.09.06.) B1 "Cartridimodal penetration ditch pre-treatment tank, cartridge module septum ditch filtration device using this and dredging filtration method using it" - Korea Institute of Construction Technology

In the above-described conventional technology, a plurality of filter cartridges are vertically arranged and partially replaced and cleaned. Only the portion requiring replacement can be easily replaced. However, since the entire longitudinal direction needs to be replaced, There is a problem in that all of the unneeded lower parts must be replaced.

In other words, the filtration unit for filtering the storm is composed of a vegetation layer for primary filtration, a filter medium for secondary filtration, and a gravel layer for promoting drainage, and only the vegetation layer and the filter medium layer except for the gravel layer are maintained. In the conventional technology, since all three floors have to be maintained, it is necessary to replace not only the filter medium layer having a longer maintenance cycle than the vegetation layer but also the gravel layer which does not require maintenance, There has been a problem that an inefficient aspect such as the occurrence of an inefficiency is generated.

In addition, there is a problem that the oil component contained in the initial rainwater is infiltrated into the filtration part, thereby shortening the period of use of the filtration part, and there is also a problem that the oil component is drained to the lower soil, that is, secondarily diffused.

Therefore, the applicant of the present invention can prevent damages by eliminating oil components in advance, and also can maintain a modular permeation ditch that can be reasonably improved inefficiency through partial maintenance of modularized layers .

It is an object of the present invention to provide a method and apparatus for treating an oil component contained in an initial rainwater through a oil adsorption means installed in a pretreatment water immersion tank to prevent the durability of a filtration unit caused by an oil component from being lowered, To prevent a secondary environmental damage, and to provide a modular infiltration ditch that is easy to maintain.

In addition, since the oil adsorption means is modularized with the oil adsorbent contained in the lattice net, the oil adsorption means can be easily disengaged from the support portion of the pretreatment water immersion tank, The present invention provides a modular infiltration ditch which can be easily maintained by easily opening and closing the accommodation space by rotating the lattice net around the hinge with only the opening operation and easily replacing the oil adsorbent accommodated in the accommodation space There is a purpose.

In addition, the present invention is characterized in that a vegetation side and a two-layer filter medium layer of one of the filtration sections for filtering the initial rainwater are respectively modularized to constitute a plurality of vegetation layers or a filter medium layer necessary for maintenance The present invention aims at providing a modular infiltration ditch which can be easily removed and removed, thereby preventing unnecessary parts from being replaced, thereby achieving reasonable maintenance.

In addition, according to the present invention, the first and second storages can be firmly assembled through the seating protrusions inserted into the seating grooves, thereby enhancing the stability of the vegetation layer disposed on the top of the media layer during the construction and maintenance, 1, the environmental damage can be prevented by preventing the unfiltered initial rainwater from flowing into the lower soil through the packing which is fitted to the outer surface of the first storage box to seal the gap between the first storage box and the neighboring first storage box, The present invention has as its object to provide a modular infiltration ditch which can be easily maintained and maintained by increasing the desorbing property of the vegetation layer and the filter medium layer by forming the inflow and outflow barrier ribs in the shape of an upper and lower beam.

According to an aspect of the present invention, there is provided a water immersion tank comprising: a pretreatment immersion tank connected to a main waterway through a first inflow pipe to store initial storms during rainfall; A bypass pipe installed between the main water channel and the pretreatment submergence tank and returning the overflowing water to the main water channel; A pretreatment submerged tank connected to the pretreatment submergence tank through a second inflow pipe to filter the inflowing stormwater, a filter material layer, and a filtration unit constituting the gravel layer, wherein the pre- The vegetation layer including a first storage compartment formed in a lower portion thereof with a grid and a plurality of second storage compartments in an upper portion thereof formed in a horizontal direction and a second storage compartment formed in the interior of the first storage compartment, And a first geoscientific fiber disposed on the bottom surface of the first storage box to prevent loss of vegetation soil filled in the first storage box and modularized. A plurality of second storage compartments formed on the upper portion of the first storage box and a gravel layer of the vegetation layer to form a second replacement handle, And a first geosynthetic fiber disposed on the bottom surface of the second storage box to prevent leakage of the porous media filled in the second storage box and modularized so that the vegetation layer and the filter media layer The present invention provides a modular infiltration ditch that is easy to maintain, characterized by being capable of selective replacement.

The use of the modular infiltration ditch of the present invention allows the oil component contained in the initial rainwater to be treated through the oil adsorption means installed in the pretreatment submergence tank to prevent the durability of the filtration unit from being degraded by the oil component Of course, it has the advantage of preventing secondary environmental damage by preventing leakage of oil components drained into the soil.

In addition, since the oil adsorption means is modularized with the oil adsorbent contained in the lattice net, the oil adsorption means can be easily disengaged from the support portion of the pretreatment water immersion tank, The lattice net can be rotated about the hinge to open and close the accommodation space by merely opening the lattice net, so that the oil absorbent accommodated in the accommodation space can be easily replaced and convenient maintenance can be achieved.

In addition, since the vegetation side and the two filter media layers of the first filtration part for filtering the initial rainwater are respectively formed by modularization, the vegetation layer or the filter medium layer necessary for maintenance according to the end of rainfall is selectively So that it is possible to perform easy replacement, thereby preventing the unnecessary parts from being replaced, thereby achieving reasonable maintenance.

In addition, the present invention can firmly assemble the first and second storage boxes through the seating projections that fit into the seating grooves, thereby enhancing the stability of the vegetation layer disposed on the top of the media layer during construction and maintenance, The first unfiltered initial rainwater can be prevented from flowing to the lower soil through the packing which is fitted to the outer surface of the first water storage compartment to seal the gap between the first watercolor and the neighboring first water storage compartment, By virtue of being in the shape of an upper light-narrowed cone, demolding of the vegetation layer and the filter medium layer can be facilitated, and maintenance is facilitated.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a conceptual diagram showing a modular infiltration ditch in which maintenance of the present invention is easy, in a plan view. Fig.
FIG. 2 is a conceptual view showing a modular infiltration trench in a front view of the present invention, which is easy to maintain. FIG.
3 is a state in which oil adsorption means is installed in the pretreatment water immersion tank of the present invention.
4 is a cross-sectional view showing a state in which the oil adsorbent configured in the oil adsorption unit of the present invention is replaced.
Fig. 5 is an exploded perspective view showing the vegetation layer of the present invention separated. Fig.
FIG. 6 is an exploded perspective view showing the separation of the filter medium layer of the present invention. FIG.
7 is a sectional view showing a state in which first and second storage boxes of the present invention are assembled.

Hereinafter, the structure of the present invention will be described.

The present invention relates to a pretreatment immersion tank (20) connected to a main waterway (10) through a first inflow pipe (1) to store initial storms during rainfall; A bypass pipe (3) installed between the main water channel (10) and the pretreatment submergence tank (20) and returning the inflowing water to the main water channel (10); A vegetation layer 40 connected to the pretreatment submergence tank 20 through the second inlet pipe 2 to filter incoming rainwater, a filter medium layer 50 and a filtration section 70 constituting the gravel layer 60 The pretreatment submergence tank 20 further includes oil adsorption means 30 for treating the oil contained in the initial stormwater, The vegetation layer 40 includes a first storage box 45 having a grid 41 at a lower portion thereof and a plurality of first storage compartments 45 formed at an upper portion of the vegetation layer 40 in a horizontal direction, And a second geosynthetic fiber (47) disposed on the bottom surface of the first storage box (45) to prevent loss of the vegetated soil (47) filled in the first storage box (45) 49, and is modularized. The media layer 50 has a grid 51 at the bottom and a second replacement handle 53 at the top A plurality of second storage chambers 55 disposed between the first storage box 45 of the biological layer 40 and the gravel layer 60, a porous medium 57 filled in the second storage box 55, And the second geoscientific fiber 59 disposed on the bottom surface of the second storage box 55 to prevent the loss of the porous medium 57 filled in the second storage box 55 and modularized, It is possible to selectively change the required vegetation layer 40 and the material layer 50, which will be described in more detail below.

1, the main waterway 10 is formed in a ditch shape having a predetermined width by being disposed along one side of a road surface in a longitudinal direction, and has an excellent water flow rate from a road surface through a ditch formed therein Flowing action is done.

1 and 2, the main waterway 10 is connected to one end of the pretreatment water immersion tank 20 through a first inflow pipe 1 so that the initial water level at the time of rainfall is supplied to the pretreatment water immersion tank 20 The pretreatment submergence tank 20 is connected to the filtration unit 70 through the second inlet pipe 2 to store the pretreated immersion tank 20 and to introduce the pretreated initial storm into the filtration unit.

When the amount of rainfall is large due to heavy rainfall, flood, or the like, it functions to bypass the reverse flow through the bypass pipe 3 connecting the main water channel 10 and the pretreatment sedimentation tank 20. Since the inflow and bypass actions are well known in the art, a detailed description thereof will be omitted.

As shown in FIGS. 1 to 3, the pretreatment immersion tank 20 receives the initial transport water from the first inflow pipe 1 connected to the main waterway 10, processes the nonpoint pollutants contained in the initial rainwater, The upper portion is provided with a normal grill or manhole for maintenance.

In the present invention, the pre-treatment submersible tank 20 further includes oil absorption means 30 for treating oil components such as oil, The oil component contained in the initial rainwater is filtered in the process of passing through the oil absorbing means 30 so that the durability of the filtration unit 70 due to the oil component can be prevented from being lowered In addition, since the oil component drained into the lower soil of the gravel layer 60 is prevented from flowing out, it is possible to prevent the secondary environmental damage.

In the present invention, as shown in FIGS. 3 to 4, the oil adsorption means 30 is modularized so that the pre-treatment water immersion tank 20 can be easily demounted.

The oil adsorption means 30 is provided with a lattice network 35 formed of a conventional wire to form a conventional oil adsorbent 37 in the internal space 32 of the lattice network 35 And a frame 31 is provided at the rim of the lattice net 35 so as to be easily coupled to the pre-treatment submersible tank 20.

In addition, the pretreatment submerging tank 20 to which the oil adsorption means 30 is coupled is further provided with support portions 21 for supporting the frame 31 formed on the grid 35, It is preferable to allow easy disconnection of the first electrode 30.

The support portion 21 is configured to support the frame 31 of the mesh net 35 provided in the oil adsorption means 30. The support portion 21 includes a pair of guiders 22 for guiding the frame 31 to be slidably engaged, And a support jaw 23 formed on the lower side of the guide 22 to support and support the frame 31.

In addition, although the maintenance of the oil absorbing means 30 can be achieved by replacing all the modularized structures, it is desirable to reduce the cost by replacing only the oil absorbent 37 which has been damaged or clogged This configuration can be easily achieved by a constitution in which the lattice network 35 constituting the oil adsorption means 30 is opened and closed through the hinge 33.

The lattice nets 35 are symmetrically arranged in a pair so that the edges of the lattice nets 35 are arranged in a pair so that one side of the frame 31 is connected to the hinge 33 Thereby opening and closing the inner accommodation space 32 of the mesh network 35.

When the lid 35 is coupled to the hinge 33 as described above, the handle 34 is formed on the other side frame 31 on which the hinge 33 is not engaged, It is preferable that the grid 35 is closed by only the operation of holding the handle 34 by hand and the handle 35 or the frame 31 is further provided with fastening means 39 for fastening It might be.

The fastening means 39 prevents the grid mesh 35 from being automatically opened. The fastening protrusion 39a is formed on one side and the fastening groove 39b is formed on the other side. The lattice nets 35 can be easily fastened. In addition, the lattice nets 35 may be applied in various ways as long as it is a known means for fastening.

In the present invention, the modularized oil adsorption means 30 has been described as a single structure. However, a conventional frame (not shown) may be additionally provided in the support portion 21 of the pretreatment submersible tank 20, The size of the oil adsorption means 30 may be reduced by fitting the means 30 into the mold, thereby improving convenience of maintenance.

Hereinafter, the vegetation layer 40, the filter medium layer 50, and the filtration part 70 constituting the gravel layer 60 will be described in more detail.

First, the vegetation layer 40 is a first layer that primarily filters the initial storm that flows into the filtration unit 70 through the second inlet pipe 2 as shown in FIG. 2 or 5, and is the same as the ground surface The present invention is characterized in that a plurality of the vegetation layers 40 are modularized and installed in a horizontal direction so as to easily remove only the parts necessary for maintenance according to the end of rainfall and to achieve easy maintenance .

In order to modularize the vegetation layer 40, the vegetation layer 40 includes a first storage box 45 having a grid 41 at a lower portion thereof and a first replacement knob 43 at an upper portion thereof, And a vegetation soil 47 which is disposed on the bottom surface of the first storage box 45 and is filled in the first storage box 45 to receive the vegetation soil 47, It is preferable to constitute the first geoscientific fiber 49 for preventing loss.

In addition, the lattice 41 of the first storage box 45 may be formed in the form of a mesh, but may be formed in a plurality of through holes, The first replacement handle 43 formed on the upper portion of the first housing 45 may be easily configured by forming a groove that penetrates a side portion of the first housing 45.

The first geotextile 49 has a function of separating, filtering, strengthening, protecting and draining the vegetation so that the vegetation soil 47 can be freed without loss of the vegetation soil 47. [ Means a woven fabric or nonwoven fabric made to smoothly achieve the drainage of rain.

In the present invention, as shown in FIG. 7, it is possible to prevent leakage of the initial storm introduced into the filtration unit 70 through the second inflow pipe 2 into a gap between the first storages 45, It is preferable to prevent the environmental damage due to the unfiltered storm water directly flowing out to the lower portion of the soil. This configuration is advantageous in that the packing groove 45a is formed on the outer surface of the first storage box 45, And then the packing 44 is coupled to the packing groove 45a.

In order to facilitate the maintenance of the modularized vegetation layer 40, it is preferable that the first storage box 45 is formed in a shape having a vertical light-narrowing shape so that an inclination alpha is formed on the surface of the first storage box 45 This is because the size of the first storage box 45 is made smaller from the upper side to the lower side so that the first storage box 45 can be easily attached and detached, thereby improving the convenience of maintenance.

Second, the filter medium layer 50 is disposed between the vegetation layer 40 and the gravel layer 60 as shown in FIG. 2 or 6, and the rainwater primarily filtered through the vegetation layer 40 is subjected to secondary filtration And is provided with a plurality of modules arranged in a horizontal direction so as to facilitate the maintenance of the vegetation layer 40, as in the case of the vegetation layer 40.

In order to achieve such modularization, the filter material layer 50 has a second storage box 55 formed with a grid 51 at a lower portion thereof and a second replacement knob 53 formed at an upper portion thereof, And a porous medium 57 which is disposed on the bottom surface of the second storage box 55 and is filled in the second storage box 55. The porous medium 57 is provided on the bottom surface of the second storage box 55, And the second geoscientific fibers 59 are preferable.

The second storage box 55 may have the same structure as the first storage box 45 of the vegetation layer 40 and may be manufactured as described above. The porous media 57 may have a similar function The second geoscientific fibers 59 can be applied and modified in a variety of known configurations and the second geosynthetic fibers 59 can be separated and processed as well as the first geosynthetic fibers 49, Means a woven fabric or a nonwoven fabric which is made so as to smoothly achieve the drainage of the rainwater.

5 to 7, the vertical arrangement of the vegetation layer 40 and the media layer 50 is matched through the assembly of the vegetation layer 40 and the media layer 50, It is preferable that the first storage box 45 formed in the vegetation layer 40 is further provided with a seating projection 46 at the bottom of the first storage box 45, The present invention can be easily achieved by providing a seating groove 56 in which the seating protrusion 46 of the first housing box 45 is fitted to the upper portion of the second housing box 55 of the first housing 50, The vegetation layer 40 disposed on the upper portion of the media material layer 50 through the rigid assembly of the first and second storages 45 and 55 has a merit that the safety of the present invention due to construction and maintenance is improved .

3, the gravel layer 60 serves to support the infiltration trench of the present invention in a structure that promotes the drainage of the secondary filtered soot into the lower soil as shown in FIG. 2, The detailed description is omitted.

Hereinafter, the operation of the preferred embodiment of the present invention will be described.

The initial storm that flows into the main waterway 10 during the rainfall flows into the pretreatment water immersion tank 20 through the first inflow pipe 1 and passes through the oil absorption means 30 installed in the pretreatment water immersion tank 20 And then flows into the filtration unit 70 through the second inlet pipe 2 and flows into the pretreatment submergence tank 20 through the initial stormwater due to heavy rainfall and floods, The initial storm is bypassed to the main waterway 10 through the bypass pipe 3.

The initial storm that has flowed into the filtration unit 70 through the process described above is subjected to the primary filtration in the process of passing through the vegetation layer 40 in the first layer and then in the process of passing through the filter medium layer 50 in the second layer Secondary filtration is performed to promote the purification of water quality and then the process of draining to the lower soil through the gravel layer 60 of three layers is performed.

In the present invention, since the oil absorbing means 30 is modularized, it is necessary to maintain the oil absorbing means 30, the vegetation layer 40 and the filter medium layer 50 after the precipitation type, 20 can be easily separated and replaced by modularized oil adsorption means 30 via a grill or a manhole disposed at the upper part of the main body 20, thereby achieving maintenance.

That is, the oil adsorption means 30 is detached from the support portion 21 of the pre-treatment submersible tank 20 by using a pair of grips 34 formed on the mesh net 35 of the oil adsorption means 30, It is possible to easily replace the oil adsorbent 37 with the oil adsorption means 30. In addition to this, after the drying network 35 of the oil adsorption means 30 is opened, only the oil adsorbent 37 filled in the inside is replaced with a new product and reinstalled It is possible to reduce the cost of maintenance of the oil adsorption means 30.

In addition, maintenance of the vegetation layer 40 and the media layer 50 can be selectively performed only after the status of the vegetation layer 40 and the media layer 50 is maintained through observation, The vegetation layer 40 and the media material layer 50 are not only modularized but also the vegetation layer 40 and the media material layer 50 are assembled through the assembly of a plurality of the vegetation layers 40 and the media material layer 50, The layers 50 are aligned vertically so that only the parts that need to be replaced can be individually removed and replaced with ease, thereby preventing unnecessary parts from being replaced, thereby achieving reasonable maintenance.

Since the first and second storage boxes 45 and 55 are formed in the shape of upper light-tight narrower when replacing the vegetation layer 40 and the filter medium layer 50, the engagement due to the detachment is minimized, The vegetation layer 40 disposed on the upper portion of the media material layer 50 through the rigid assembly of the first and second storages 45 and 55 is firmly installed so that the stability of the present invention due to the construction and maintenance can be enhanced do.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments.

?: slope 1: first inlet pipe 2: second inlet pipe 3: bypass pipe
10: Main waterway
20: pretreatment tank 21: support portion 22: guider 23: support jaw
[0001] The present invention relates to an oil absorbing device, and more particularly,
40: a vegetation layer 41: a lattice 43: a first replacement handle 44: a packing 45: a first accommodation box 45a: a packing groove 46: a seating projection 47: a vegetable soil 49:
50: filter material layer 51: lattice 53: second replacement handle 55: second housing 56: seat groove 57: porous media 59: second geosynthetic fiber
60: gravel layer 70: filtration part
100: Modular penetration ditch for easy maintenance

Claims (5)

A pretreatment water immersion tank 20 connected to the main waterway 10 through a first inflow pipe 1 to store initial storminess during rainfall; A bypass pipe (3) installed between the main water channel (10) and the pretreatment submergence tank (20) and bypassing the overflowing water to the main water channel (10); A vegetation layer 40 connected to the pretreatment submergence tank 20 through the second inlet pipe 2 to filter incoming rainwater, a filter medium layer 50 and a filtration section 70 constituting the gravel layer 60 ), ≪ / RTI >
The pretreatment immersion tank 20 is provided with a grid mesh 35 having a frame 31 at its rim for processing the oil contained in the initial stormwater, And further comprises a modularized oil adsorption means (30) composed of an adsorbent (37)
The pretreatment immersed tank 20 further includes a support portion 21 for supporting a frame 31 formed in the mesh net 33 of the oil adsorption means 30,
The lattice net 35 of the oil adsorption means 30 is formed so that one side of the frame 31 is coupled to the hinge 33 to open and close the inside accommodation space 32, A pair of knobs 34 are formed on the other side of the frame 31 to be opened and closed so as to be assembled with each other,
The vegetation layer 40 includes a first storage box 45 having a grid 41 at a lower portion thereof and a plurality of first storage compartments 45 formed at an upper portion of the vegetation layer 40 in a horizontal direction, And a second geosynthetic fiber (47) disposed on the bottom surface of the first storage box (45) to prevent loss of the vegetated soil (47) filled in the first storage box (45) 49, and is modularized,
The filter material layer 50 includes a grid 51 at the bottom and a second replacement handle 53 at the top to form a plurality of A porous medium 57 filled in the second storage box 55 and a porous medium 57 disposed on the bottom surface of the second storage box 55 and filled in the second storage box 55, And the second geoscientific fiber 59 for preventing the loss of the medium 57,
Wherein the vegetation layer (40) and the filter medium layer (50), which are required to be maintained after rainfall, can be selectively replaced.
delete delete The portable terminal as claimed in claim 1, wherein the outer surface of the first housing (45) further includes a packing groove (45a) in which a packing (44) for sealing a gap between the first housing (45) ,
Wherein the first and second storage boxes (45, 55) form a slope (?) On the surface so as to have a shape of a narrow-light-tight narrowing.
[2] The apparatus according to claim 1, wherein the first storage box (45) further comprises a seating projection (46)
The upper portion of the second storage box 55 further includes a seating groove 56 into which the seating protrusion 46 of the first storage box is inserted,
The vegetation layer 40 can be accurately positioned on the filter medium layer 50 through the assembly of the first and second storages 45 and 55 and the vegetation layer 40 and the filter medium layer 50 ) Can be individually removed by layers and can be selectively replaced. A modular infiltration ditch that is easy to maintain.

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