KR20110074380A - Small structured constructed wetland for controlling nps and connecting the ecosystem on bridge - Google Patents

Abstract

PURPOSE: A attachable small scale artificial wetland for the green tract of land ecology shaft coupling of bridge and nonpoint pollutant processing is provided to eliminate the nonpoint pollutant among the rain fall effluent generated from the bridge deck of the bridge, and to create the small scale of wetland according to the throttling direction of the bridge by considering the restrict location condition and structure feature like the bridge. CONSTITUTION: The attachable small scale artificial wetland for the green tract of land ecology shaft coupling of bridge and nonpoint pollutant processing includes: a recess(20) in which the upper side formed as the opened tank form and influx nit is formed in one side and the outlet part is formed in the other side; a wet part(30) in which influx unit corresponding to the outlet part of the recess is formed in the upper side and one end and which prepares sidewall and the other end side finishing wall higher than the bridge deck and is formed as channel form in which the rain fall effluent flowing is under-currented. The recess comprises the filter membrane. The filter membrane is installed in the outlet part and filters contaminant among the rain fall effluent flowing. The wet part comprises the rain fall effluent drainpipe. The rain fall effluent drainpipe is penetrated and installed in the vegetation layer and the finishing wall exposing to the upper side.

Description

Small structured constructed wetland for controlling NPS and connecting the ecosystem on bridge}

The present invention relates to a small scale artificial wetland for attaching the green ecological axis of the bridge to remove the non-point contaminants and to remove the non-point pollutants, the sediment and the rainfall inflow rainfall from the bridge of the bridge flows Rainfall runoff flows into the sedimentation part, and vegetation layer is formed on the upper side to remove nonpoint pollutants in the rainfall runoff, and to connect small scale artificial wetlands for attaching green ecology axis of bridges to form green ecology axis. will be.

Pollutants generated in urban areas can be classified into point sources and non-point pollution sources (NPS). Point pollutants are pollutants with specific emission paths, such as household sewage and factory wastewater, which can be expressed as a single point. Non-specified sources of discharge of unspecified water pollutants from unspecified places such as roads, farmland, mountainous areas, and construction sites (see Article 2, paragraph 2 of Chapter 1 of the Act on Conservation of Water Quality and Aquatic Ecosystems); Also known as cotton, mobile, or other water pollution sources.

Such non-point source is a scattered pollutant, unlike point sources that occur continuously at certain points, such as domestic sewage or factory wastewater, and it is difficult to identify an accurate outflow path and is characterized by non-persistent inflow. In addition, it is difficult to collect pollutants due to the inflow and outflow of pollutants, and it is difficult to collect them, and the amount and emission are highly dependent on weather conditions such as precipitation. Examples of such nonpoint sources include earth and sand, nutrients (floating substances, nitrogen and phosphorus), bacteria and viruses, oils and greases, heavy metals, organic substances, pesticides and contaminants.

In addition, as land development is accelerated due to the progress of urbanization and industrialization, and the impermeable layer area such as roads, industrial complexes, and residential lands is increased, the water quality of rivers and lakes caused by nonpoint source is worsening. In particular, pollutants such as soil, nutrients, and heavy metals spilled with rainfall are difficult to collect and treat, so they enter the stream without any special treatment and contaminate the water quality, eventually killing fish or destroying benthic habitats. This results in disturbances in the aquatic ecosystem.

In the case of non-point pollutant treatment facilities, a different approach from the existing sewage treatment methods should be provided in consideration of the non-point source spillage characteristics. Facilities that are applied as non-point pollutant treatment facilities include various types of treatment facilities such as storage type using artificial wetland, infiltration type, vegetation type, device type, and sewage treatment type. Therefore, appropriate devices are used according to the characteristics of each region and watershed to be installed.

In particular, in the case of bridges with frequent traffic flows, runoff such as rainwater contains a large amount of substances such as heavy metals, whereas non-point pollutant removal devices for reducing or removing them have structural characteristics such as thickness of slabs, The reality is that it is difficult to install due to the limitation of the width of the bridge. In addition, since bridges are mainly installed in lakes, rivers, and the like, rainwater runoff containing nonpoint pollutants is introduced into rivers and lakes without treatment for nonpoint pollutants. have.

Here, the geographical features of Korea are described, Korea has a high number of geographically high mountains, because of this, many rivers and lakes are formed. Especially in Seoul, there are many bridges on the Han River. These bridges have concrete beauty because they are concrete structures, but they are fragile in ecological environments. Therefore, there is a need for landscaping to create greenery in the bridge, and to create an ecological axis that can connect both ends of the bridge. However, due to the structural characteristics of the bridge, there is a practical problem accompanied by difficulty of installation.

Therefore, an object of the present invention is to consider the limited location conditions and structural characteristics such as bridges, small artificial wetlands for attaching the ecological axis of the bridge to remove the non-point pollutants in the rainfall runoff generated from the bridge and to treat the non-point pollutants To provide.

Another object of the present invention is to provide a small scale artificial wetland for attachment to the greenery eco-axis connection and non-point pollutant treatment of the bridge having a vegetation layer in which plants and the like are planted on the top to create an ecological axis.

It is still another object of the present invention to provide a small scale artificial wetland for attachment to the green axis of the bridge that effectively removes nonpoint pollutants by means of attachment, filtration, absorption by plant roots, biodegradation, and the like for treatment of nonpoint pollutants. .

It is still another object of the present invention to provide a small scale artificial wetland for attaching the green axis of the bridge for purifying air pollutants such as smoke emitted from a vehicle, and for treating nonpoint pollutants.

Still another object of the present invention is to provide a small scale artificial wetland for attachment for green axis eco-axis connection and non-point pollutant treatment of bridges to effectively remove nonpoint pollutants even when a large amount of rainwater is spilled.

In order to achieve the above object, the present invention is to remove the non-point pollutants in the rainfall runoff generated from the bridge of the bridge and to handle the green ecological axis connection and non-point pollutants of the bridge formed in the direction of the bridge of the bridge to form a green ecological axis As a small artificial wetland for attachment, the upper surface is formed in the shape of an open tank, the inlet is formed on one side and the sediment formed on the other side; And a wetland in the form of a channel in which rainfall inflows are formed, wherein an inflow portion corresponding to an outlet of the settling portion is formed at an upper surface and one end, and has both sidewalls higher than the bridge and the other end wall. The sedimentation part includes a filter film for filtering contaminants in the rainfall runoff, which is installed at the outlet side, and the wetland part is connected to the green area of the bridge including the vegetation layer exposed to the upper surface and non-point pollutant treatment. It provides a small artificial wetlands for attachment.

As the filter film, it is preferable to use a wood chip pack filled with a plurality of wood chips in a lattice-shaped frame forming a predetermined shape so as to facilitate replacement and use.

The sedimentation part includes a gravel layer and a sand layer stacked therein from above, and the wetland portion further includes a layer mat and a gravel layer stacked from above on the bottom of the vegetation layer, thereby causing non-point pollution in rainfall runoff flowed into the sedimentation part and the wetland part. It is desirable to allow the material to be removed more reliably.

The sedimentation portion further includes a rainfall runoff discharge pipe installed vertically through the filter film and having an upper end coinciding with the upper end of the filter film, and a rainfall runoff transport pipe horizontally installed at an intermediate portion of the filter film. Rainfall runoff drain pipe is installed through the finish wall, and the horizontal run through the floor mat is installed further comprises a rainfall runoff discharge pipe and the rainfall runoff discharge pipe connected between the rainfall runoff drain pipe and the rainfall runoff discharge pipe And the rainfall runoff transport pipe, the rainfall runoff transport pipe is preferably composed of a porous pipe.

The wetland portion further includes a rainfall runoff distribution pipe embedded in the gravel layer, the rainfall runoff distribution pipe is preferably composed of a porous pipe.

Preferably, the wetland portion further includes a gravel layer wall installed between the layer mat and the gravel layer and the finishing wall.

The small scale artificial wetland for attachment for green area ecological axis connection and nonpoint pollutant removal according to the present invention when the rainfall runoff from the bridge of the bridge flows into the sediment Contaminants in rainfall effluent are filtered and removed, and the rainfall effluent is filtered and removed to be transferred to wetlands and supplied as water to plants planted in vegetation layers to remove nonpoint pollutants in rainfall effluents, such as bridges. In consideration of the limited location conditions and structural characteristics, small artificial wetlands can be formed along the bridge's axial direction, resulting in the removal of nonpoint pollutants in rainfall runoff and the creation of green ecosystem linkages.

In addition, as the filter layer, a wood chip pack in which a plurality of wood chips are filled in a lattice-shaped frame may be easily replaced and used.

In addition, since the sedimentation part is provided with a gravel layer and a sand layer, and the wetland part has a layer mat and a gravel layer, it is possible to more effectively remove non-point pollutants from the rainfall runoff.

The sedimentation portion further includes a rainfall runoff discharge pipe installed vertically through the filter film and having an upper end coinciding with the upper end of the filter film, and a rainfall runoff transport pipe horizontally installed at an intermediate portion of the filter film. It is installed through the floor mat horizontally further comprises a rainfall runoff transport pipe connected between the rainfall runoff transport pipe and the rainfall runoff drain pipe of the sedimentation section, the rainfall runoff discharge pipe and rainfall runoff transport pipe, rainfall runoff transport pipe is a porous pipe Rainfall runoff from which non-point contaminants are removed from the sediment is transferred to the wetland through the rainfall runoff transport pipe, so that the rainfall runoff is smoothly transferred.

In addition, the wetland portion further includes a rainfall runoff distribution pipe buried in the gravel layer, and the rainfall runoff distribution pipe is composed of a porous pipe, so that the inside of the water drainage, such as the low-water period, a large amount of rainfall runoff is unexpectedly instantaneous In this case, it acts as a buffer for freshwater runoff flowing into the wetland as much as the empty space to prevent the runoff from overflowing to the road, that is, the bridge, and the runoff flows into the rainfall runoff distribution pipe. The low resistance results in a smooth flow of rainfall runoff and prevents clogging of the media due to stagnation of rainfall runoff.

The wetland part further comprises a gravel layer wall installed between the layer mat and the gravel layer and the finishing wall so that the non-point pollutants in the rainfall runoff are once discharged by the gravel layer wall before the rainfall is discharged to the outside through the rainfall runoff drain pipe. Since it is more attached and removed, the removal of nonpoint pollutants can be performed more effectively.

In addition, according to the present invention, non-point pollutants are effectively removed by methods such as absorption and biodegradation by plant roots planted in the wetlands, and there is an effect of purifying pollutants in the atmosphere such as smoke.

Hereinafter, with reference to the accompanying drawings will be described in detail the small scale artificial wetland for attaching the green axis eco-axis connection and non-point pollutant for greenery eco-axis connection and non-point pollutant removal according to a preferred embodiment of the present invention.

1 to 3 is a side view, a longitudinal cross-sectional view and a plan view of a small scale artificial wetland for attachment for green bridge eco-axis connection and non-point pollutant treatment of the bridge according to an embodiment of the present invention.

As a bridge to which a small artificial wetland according to the present invention is applied, as shown in FIG. 2) The slab 3 and the packaging 4 are formed on.

As shown in Figs. 2 and 3, the small scale artificial wetland according to the present invention is installed in the axial direction on both sides of the pavement, that is, the bridge surface 4 of the road.

As shown in FIG. 3, the small scale artificial wetland includes a sedimentation part 20 and a wetland part 30. In particular, the small scale artificial wetland for attachment for green axis eco-axis connection and non-point pollutant treatment of the bridge according to the present invention is formed in the direction of the bridge on both sides of the bridge, the wetland portion 30 is connected to the sedimentation portion 20 bridge Is formed long in the axial direction on the cross-section (4) of.

Figure 4 is a perspective view of the sedimentation portion of the small scale artificial wetland for attachment for greenery ecological axis connection and non-point pollutant treatment of green bridges and ecological connections and non-point pollutants removal according to an embodiment of the present invention, Figure 5 6 is a cross-sectional view taken along line AA of FIG. 5, FIG. 7 is a cross-sectional view taken along line BB of FIG. 5, and FIG. 8 is a green space of a bridge for connecting greenery eco-axis and removing non-point pollutants according to an embodiment of the present invention. 9 is a perspective view of a wetland portion of a small artificial wetland for attachment for ecological axis connection and non-point pollutant treatment, FIG. 9 is a plan view of the wetland portion, FIG. 10 is a cross-sectional view taken along line CC of FIG. 9, and FIG.

As shown in FIG. 3, the small scale artificial wetland according to the present invention includes a sedimentation part 20 and a wetland part 30. The sedimentation part 20 is a portion into which the rainfall runoff generated from the cross-section is introduced, and the wetland part 30 is connected to the sedimentation part 20 so that the rainfall outflow water introduced into the sedimentation part 20 is purified. Action is achieved.

As illustrated in FIGS. 4 to 7, the settling portion 20 is formed in the shape of an open water tank, and is installed at the same height as the bridge surface 4. The inlet portion 21 is formed on one side of the settling portion 20 and the outlet portion 22 is formed on the other side. The inlet portion 21 is a portion to allow the rainfall runoff flows into the sedimentation portion 20, the outlet portion 22 is so that the rainfall runoff flowed into the sedimentation portion 20 to the wetland portion 30 again. That's the part.

In addition, the sedimentation part 20 is provided on the outlet part 22 side and the rainwater flowing into the sedimentation part 20 is provided with a filter film (23) for filtering the non-point pollutant when the inflowing rainwater flows through While the outflow water passes through the filter film 23, the non-point pollutant in the rainfall effluent is configured to flow into the wetland portion 30 in a filtered and removed state.

It is preferable to use a wood chip pack as the filter film 23. The wood chip pack is formed in such a way that a small sized wood chip is contained in a lattice-shaped frame that is easy to replace and use. When the wood chip pack is used as the filter film 23, the non-pollutant material in the rainfall effluent is used. It is easy to remove and can be used for a long time, but also has the advantage of easy replacement. The wood chip pack used as the filter layer 23 is filled with a plurality of wood chips inside a grid-shaped frame.

However, the filter film 23 is not limited to only a wood chip pack, and any material can be used as long as it can satisfy the ease of removal, use life, and replacement of non-point pollutants in rainfall effluent.

In addition, the gravel layer 24 and the sand layer 25 are sequentially formed in the settling portion 20. That is, the gravel layer 24 and the sand layer 25 are stacked in the space between the inlet part 21 side wall surface of the settling part 20 and the filter medium film 23 provided in the outlet part 23 side.

Rainfall runoff introduced into the settling portion 20 is settled into the gravel layer 24 and the sand layer 25, in this process, non-point pollutants in the rainfall runoff are attached to the gravel layer 24 and the sand layer 25 to be removed. .

Eventually, the rainfall runoff flowing into the settling portion 20 is the wetland portion 30 in which the non-point pollutants are removed by the filtration of the filter medium 23 and the adhesion of the gravel layer 24 and the sand layer 25. Flows into.

In addition, the sedimentation part 20 is a rainfall runoff discharge pipe 26 is installed vertically through the filter film 23, and the rainfall runoff transport pipe 27 is installed horizontally through the middle portion of the filter film (23) This is further provided.

The upper end of the rainfall runoff discharge pipe 26 is installed at the same height as the upper end of the filter medium (23). The rainfall runoff transport pipe 27 is extended to the wetland portion (30).

The rainfall runoff discharge pipe 26 bridges immediately without overflowing the runoff film 23, the gravel layer 24, and the sand layer 25 when the rainfall runoff overflows the sedimentation part 20 due to the heavy rainfall. To be discharged to the bottom. The rainfall runoff discharge pipe 26 is typically connected to a drain pipe (not shown) installed in the bridge.

The rainfall runoff transport pipe 27 is to transfer the rainfall runoff discharged to the settling portion 20 to the wetland portion (30).

The rainfall runoff discharge pipe 26 and the rainfall runoff transport pipe 27 use a perforated pipe in which a plurality of water holes are formed in the circumferential wall. As the perforated pipe, a concrete perforated pipe, a P.E perforated pipe, or the like can be used.

In addition, the rainfall runoff flowing into the settling portion 20 and passing through the filter medium 23, the gravel layer 24, and the sand layer 25 is transferred to the wetland portion 30 through the rainfall runoff transport pipe 27. However, some of the rainfall runoff remaining in the sedimentation part 20 is discharged to the lower portion of the bridge through the rainfall runoff discharge pipe 26 through a plurality of water holes drilled in the main wall of the perforated pipe constituting the rainfall runoff discharge pipe 26. 20) Rainwater runoff will not be stored for a long time, preventing odors and mosquitoes.

8 to 11, the wetland portion 30 is formed in the form of a channel (channel) having an upper surface and one end is open, both sidewalls (31a) 31b and the other end side closing wall (31c). . Both sidewalls 31a and 31b and the blocking wall 31c are installed higher than the bridge surface 4 so that the rainfall runoff on the bridge surface 4 is blocked by the side walls 31a and 31b so that the settling portion ( Only the rainfall runoff water filtered and removed through 20) is introduced, and the rainfall runoff water is not prevented from entering the wetland part 30.

The opening portion of one end of the wetland portion 30 constitutes an inlet portion 32 connected to the outlet portion 22 of the sedimentation portion 20.

In addition, the vegetation layer 33 exposed to the upper surface is formed in the wetland portion 30, the plant 33a is planted in the vegetation layer 33. Therefore, the greenery ecological axis is formed in the direction of the bridge of the bridge due to the plant 33a, and the non-point pollutants of the rainfall runoff in the wetland portion 30 are absorbed and removed by the root of the plant 33a. As the vegetation layer 33, a vegetation mat may be used or soil may be used. Therefore, non-point pollutants in rainfall runoff due to the soil, etc. are removed through the action of biodegradation.

In addition, a layer mat 34 and a gravel layer 35 are formed inside the wetland portion 30, that is, the lower portion of the vegetation layer 33. The gravel layer 35 may be used as a movement passage of rainfall runoff in the wetland portion 30, and the rainfall runoff is attached to the gravel of the gravel layer 35 to remove nonpoint pollutants. Therefore, since the gravel layer 30 serves as a movement passage of the rainfall oil discharge, the entire utilization of the wetland portion 30 is used, thereby increasing the space utilization.

The layer mat 34 is formed between the vegetation layer 33 and the gravel layer 35 to induce the rainfall runoff in the gravel layer 35 to be easily moved to the vegetation layer 33. Therefore, the layer mat 34 is preferably filled with a material having excellent water permeability. In addition, the layer mat 34 may be filled with a nutrient substance for supplying nutrients for the growth of the plant 33a that is planted in the vegetation layer 33 and may filter foreign substances contained in rainwater. Can be filled with filtration material.

In addition, a rainfall runoff drainage pipe 36 is installed on the finishing wall 31c of the wetland part 30 so that the rainfall runoff stored in the wetland part 30 is discharged to the outside. Therefore, the rainfall runoff drainage pipe 36 allows the wetland part 30 to function smoothly even when a large amount of rainfall runoff is introduced, and also facilitates the flow of rainfall runoff in the wetland part 30. , Non-point pollutants in the sedimentation portion 20 to be easily introduced into the wetland portion 30 of the rainfall outflow water filtered.

The rainfall runoff drainage pipe 36 is preferably formed in accordance with the height of the gravel layer 35 in the wetland portion (30). Therefore, the rainfall runoff flowing into the wetland portion 30 is stored up to at least the gravel layer 35, thereby continuously supplying moisture to the vegetation layer 33.

In addition, the wetland portion 30 is installed horizontally through the layer mat 34, the rainfall runoff transport pipe connected between the rainfall runoff discharge pipe 27 and the rainfall runoff drain pipe 36 of the sedimentation part (20) 37) and a rainfall runoff distribution pipe 38 embedded in the gravel layer 35 is further provided.

The rainfall runoff transport pipe 37 and the rainfall runoff distribution pipe 38 use a hole perforated with a plurality of water holes in the main wall. As the perforated pipe, a concrete perforated pipe, a P.E perforated pipe, or the like can be used.

The rainfall runoff feed pipe 37 is installed in line with the rainfall runoff feed pipe 27 of the settling portion 20, and substantially the rainfall runoff feed pipes 27, 37 form a single pipe line. will be.

An end of the rainfall runoff pipe 37 is connected to an upper end of the rainfall runoff drain pipe 36.

The rainfall runoff distribution pipe 38 decomposes the rainfall runoff flowed into the gravel layer 35 through a plurality of water holes perforated in the circumferential wall thereof so as to provide an equal moisture supply to the vegetation layer 33. will be.

In addition, the rainfall runoff distribution pipe 38 is buffered to drain the rainfall runoff that flows into the wetland part 30 as much as the empty space when a large amount of rainfall runoff is instantaneously emptied in the dry season. It also serves to reduce the blockage of the filter medium (23) due to the stagnation of rainfall runoff by smoothing the flow of rainfall runoff flowing into the wetland portion 30 from the sedimentation section 20.

In addition, the wetland portion 30 is installed between the end of the layer mat 33 and the gravel layer 34 and the finishing wall 31c to finally filter the rainfall runoff water drained to the rainfall runoff drain pipe (36) A gravel layer 39 is further included.

Hereinafter, a description will be given of the operation of the small scale artificial wetland for the attachment for green bridge eco-axis connection and non-point pollutant treatment of the bridge according to the present invention.

Rainfall runoff from the bridge surface 4 of the bridge flows into the settling section 20 over the inlet 21 or its walls, and the incoming rainfall runoff is primarily provided with a gravel layer 24 in the settling section 20. While settling through the sand layer 25, non-point pollutants are attached to and removed from the gravel layer 24 and the sand layer 25.

Rainwater effluent with nonpoint contaminants attached and removed by the gravel layer 24 and the sand layer 25 passes through the filter medium 23 provided at the discharge part 22 and is subsequently filtered and removed. do.

Rainfall effluent from which non-point contaminants are removed while passing through the sedimentation part 20 is introduced into the wetland part 30 through the rainfall outflow water outlet 22 and the inlet part 32 of the wetland part 30.

Rainfall runoff introduced into the wetland 30 is stored in the gravel layer 35, and the rainfall runoff stored in the gravel layer 35 is supplied to the vegetation layer 33 while penetrating the layer mat 34, and the vegetation layer. Rainfall runoff water supplied to 33 is supplied as water to the plant 33a planted in the vegetation layer 33.

Rainwater runoff water supplied in the wetland portion 30 in this process is attached and filtered by the gravel layer 35 and the layer mat 34 to remove the non-point pollutants. In addition, the rainwater from which the nonpoint pollutant is removed is supplied as water to the plant 33a planted in the vegetation layer 33, so that the plant 33a is not contaminated by the nonpoint pollutant.

Rainfall runoff in the wetland portion 30 is easily moved through the gap of the gravel layer 35, so that the entire space of the wetland portion 30 is smoothly used.

When a large amount of rainfall runoff flows into the wetland portion 30, it is discharged to the outside through the drain hole 36 formed in the finishing wall 31c of the wetland portion 30.

In addition, since the initial rainfall runoff is continuously stored in the gravel layer 35 of the wetland part 30, the non-point pollutant contained in the initial rainfall runoff is largely removed by the vegetation layer 33 and the gravel layer 35.

On the other hand, some of the rainfall runoff flowing into the sedimentation unit 20, that is, the rainfall runoff flowing out to the sedimentation unit 20 without flowing through the outlet 22, the rainfall runoff transported horizontally installed in the filter film (23) Inflow into the rainfall runoff transport pipe 27 through a plurality of water holes perforated in the main wall of the pipe 27, wetlands through the rainfall runoff transport pipe 27 and the rainfall runoff transport pipe 37 of the wetland portion 30 Transferred to the unit 30. Therefore, the rainfall runoff water from which the non-point pollutant is removed from the sedimentation part 20 can be effectively transferred to the wetland part 30.

In addition, in the case of rainfall overflowing the sedimentation part 20 due to heavy rainfall, the overflowed rainfall flows through the rainfall runoff discharge pipe 26 without passing through the filter film 23 or the gravel layer 24 and the sand layer 25. It is discharged to the bottom of the bridge through a drain pipe (not shown) installed in the. Therefore, it is possible to prevent the inundation and loss of the sedimentation part 20 or the wetland part 30 and the road due to the overflow of the rainfall runoff.

In addition, the rainfall runoff that is transferred to the rainfall runoff transport pipe 37 of the wetland part 30 through the rainfall runoff transport pipe 27 of the sedimentation part 20 is a plurality of perforated walls of the rainfall runoff transport pipe 37. It flows into the layer mat 34 through the water hole, where the non-point contaminants in the rainfall effluent are once again removed by the layer mat 34 and then supplied as water to the plants 33a of the vegetation layer 33.

Rainfall runoff remaining in the gravel layer 35 of the rainfall runoff introduced into the wetland part 30 is the gravel layer 35 and the rainfall runoff distribution pipe 38 through a water hole drilled in the circumferential wall of the rainfall runoff distribution pipe 38. Rainfall runoff is distributed evenly to the wetland portion 30 while entering and leaving between the inside of the vegetation layer 33, so that the water supply to the plants 33a of the vegetation layer 33 is made more smoothly and evenly.

In addition, the rainfall runoff distribution pipe 38 is buffered to drain the rainfall runoff that flows into the wetland part 30 as much as the empty space when a large amount of rainfall runoff is instantaneously emptied in the dry season. It serves as a wealth to prevent rainfall runoff overflows the road, that is, the bridge (4).

Unlike the rainfall runoff flowing into the gravel layer 35 is subject to flow resistance by the gravel layer 35, the rainfall runoff flowing into the rainfall runoff distribution pipe 38 has less flow resistance, so the rainfall runoff flows smoothly. In addition, it is possible to prevent the clogging of the filter medium 23 due to the stagnation of rainfall runoff.

Rainfall runoff remaining in the wetland portion 30 is drained to the outside through the rainfall runoff drainage pipe (36).

At this time, the rainfall runoff remaining in the wetland portion 30 is the gravel layer wall installed between the end of the layer mat 33 and the gravel layer 34 and the finishing wall 31c before being drained to the rainfall runoff drain pipe 36. The non-point pollutant remaining in the rainfall runoff is attached to and removed from the gravel layer 39 in this process.

In addition, air pollutants such as smoke emitted from the vehicle are purified by the plants 33a planted in the vegetation layer 33 of the wetland portion 30.

In addition, since the nonpoint pollutants in the rainfall effluent are also removed by absorption and biodegradation at the root of the plant 33a, the effect of the nonpoint pollutants is increased.

As described above with reference to the drawings illustrating a small scale artificial wetland for attachment for green axis eco-axis connection and non-point pollutant treatment of the bridge according to the present invention, the present invention is limited by the embodiments and drawings disclosed herein Of course, various modifications may be made by those skilled in the art within the scope of the technical idea of the present invention.

1 to 3 is a side view, a longitudinal sectional view and a plan view of a small scale artificial wetland for attachment for green bridge eco-axis connection and non-point pollutant treatment of the bridge according to an embodiment of the present invention,

Figure 4 is a perspective view of the sedimentation portion of the small scale artificial wetland for attachment for greenery eco-axis connection and non-point pollutant treatment of the bridge for the green axis eco-axis connection and non-point pollutant removal according to an embodiment of the present invention,

5 is a plan view of the settling portion,

6 is a cross-sectional view taken along the line A-A of FIG.

7 is a cross-sectional view taken along the line B-B of FIG.

8 is a perspective view of the wetland portion of the small scale artificial wetland for attachment for green bridge eco-axis connection and non-point pollutant treatment of the bridge according to an embodiment of the present invention,

9 is a plan view of the wetland portion,

10 is a cross-sectional view taken along the line C-C of FIG.

FIG. 11 is a cross-sectional view taken along the line D-D of FIG. 9.

<Explanation of symbols for the main parts of the drawings>

4: bridge

20: sedimentation portion 21: inlet portion

22: outlet 23: filter media

24, 35: gravel layer 25: sand layer

26: rainfall runoff discharge pipe 27: rainfall runoff transport pipe

30: wetland portion 31a, 31b: side wall

31c: finishing wall 32: inlet

33: vegetation layer 33a: plant

34: layer mat 36: rainfall runoff drain

37: rainfall runoff pipe 38: rainfall runoff distribution pipe

39: gravel layer wall

Claims (6)

As a small artificial wetland for attachment to remove non-point pollutants in rainfall runoff generated from bridges of bridges and to connect the green axis of the bridges formed in the direction of bridges of the bridges and to treat nonpoint pollutants An upper surface is formed in an open water tank shape, the inlet is formed on one side and the settling portion formed on the other side; And An inflow portion corresponding to the outflow portion of the settling portion is formed at an upper surface and one end portion, and includes a wetland portion in the form of a channel in which rainfall flow-out water is stored, having both sidewalls higher than the bridge and the other end wall; The sedimentation part includes a filter film installed on the outlet side to filter contaminants in the rainfall runoff water, The wetland portion is a small artificial wetland for attachment for connection to the green axis eco-axis of the bridge consisting of a vegetation layer exposed to the upper surface and a rainfall runoff drain pipe installed through the finishing wall. The method of claim 1, The filter film is a small artificial wetland for attachment for connection to the ecological axis of the bridge and non-pollutant treatment, characterized in that the wood chip pack filled with a plurality of wood chips in the grid-shaped frame forming a certain shape. The method of claim 1, The settled portion includes a gravel layer and a sand layer stacked thereon from above, The wetland portion is attached to the bottom of the vegetation layer is a small scale artificial wetland for attachment for ecological shaft connection and non-point pollutant treatment of green bridges characterized in that it further comprises a layer mat and a gravel layer. The method according to claim 1 or 3, The sedimentation part further includes a rainfall runoff discharge pipe installed vertically through the filter film and having an upper end corresponding to an upper end of the filter film, and a rainfall runoff feed pipe horizontally installed in the middle of the filter film. The wetland portion further includes a rainfall runoff transport pipe installed horizontally through the layer mat is connected between the rainfall runoff transport pipe and the rainfall runoff drain pipe. The small scale wetlands for attachment to the green belt eco-axis connection and non-point pollutant treatment of the bridge, characterized in that the rainfall runoff discharge pipe, rainfall runoff transport pipe, rainfall runoff transport pipe comprises a porous pipe. The method of claim 4, wherein The wetland portion further comprises a rainfall runoff distribution pipe embedded in the gravel layer, the rainfall runoff distribution pipe is a small scale artificial wetland for attachment for green axis eco-axis connection and non-point pollutant treatment of the bridge, characterized in that consisting of a porous pipe. The method according to claim 1 or 3, The wetland portion is attached to the small scale artificial wetland for the connection of the green axis eco-axis and non-point pollutant treatment of the bridge, characterized in that it further comprises a gravel layer wall installed between the layer mat and the gravel layer and the finishing wall.

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