JP2022038426A - Artificial turf drainage structure and artificial turf drainage system - Google Patents

Abstract

To reduce maintenance work such as cleaning, and to easily and reliably collect small pieces flowing from a playground without letting rainwater flow out to the playground.SOLUTION: A artificial turf drainage structure provided around artificial turf S comprises a gutter with a water permeable function on a bottom, a permeable drainage pipe 3 installed at the bottom of the gutter 2, fine sand 4 filled over the permeable drainage pipe 3 in the gutter 2, and a partition plate 5 having a function of a weir to prevent the outflow of the fine sand 4 and partitioning the extending direction of the gutter 2 so as to be able to pass through the permeable drainage pipe 3.SELECTED DRAWING: Figure 4

Description

The present invention relates to an artificial turf drainage structure and an artificial turf drainage system.

Conventionally, in order to drain rainwater that falls on a general outdoor artificial turf playground such as a baseball field, a soccer field, or a rugby field, gutters are installed on the four circumferences of the playground, and rainwater is collected in these gutters. It's watering. Then, the collected rainwater reaches the gutter, is further collected by one or more basins, and is discharged to the outside of the playground by the underdrain pipe. The discharged rainwater may be discharged into the sewage in the combined sewerage maintenance area, but in the divided drainage area, it is discharged as it is to the river or the like via the rainwater pipe.

By the way, in the artificial turf playground, various exercises and the like are performed on the artificial turf. In such an act, not only walking but also a large amount of energy such as sliding may be added. Artificial turf is manufactured by planting turf leaves made of synthetic resin so that it can withstand such a large amount of energy. , The strength of the resin body is reduced, and it is cut into small pieces.
Further, in recent artificial turf, in order to reduce the burden on the knees of people who use the playground, fine resin chips are often filled at the base of the artificial turf to absorb energy.

As mentioned above, broken pieces of artificial turf and small pieces such as chips flow into the gutters along with the flow of rainwater, and these gutters are equipped with grating (mesh) for the purpose of preventing large foreign substances from falling. It is only a countermeasure, and it does not have a function to capture the above-mentioned small pieces. Therefore, the generated resin-derived debris will flow out from the river to the ocean together with other wastewater. This fragment is called microplastic, and in recent years, it has been closely watched as a substance that has an environmental impact on organisms living in the ocean and rivers.
As a device for dealing with such a problem, for example, a device in which a perforated corrugated pipe is installed in a drainage gutter as shown in Patent Document 1 and a small piece of turf is collected by the corrugated pipe is known.

Japanese Unexamined Patent Publication No. 2011-137354

However, in the drainage structure provided in a playground such as a conventional artificial turf as shown in Patent Document 1, clogging occurs immediately with only the filtration mesh of the corrugated pipe, and rainwater at the time of clogging is on the playground. There was a problem that it overflowed.
In addition, since it is difficult to clean the gap at the bottom of the corrugated pipe, there is room for improvement in that respect.

The present invention has been made in view of the above-mentioned problems, and it is possible to reduce maintenance work such as cleaning, and it is possible to easily and surely remove small pieces flowing from the playground without letting rainwater flow out to the playground. It is an object of the present invention to provide an artificial turf drainage structure and an artificial turf drainage system that can be recovered.

In order to achieve the above object, the drainage structure of the artificial turf according to the present invention is a drainage structure of the artificial turf provided around the artificial turf, and has a side groove having a water permeable function at the bottom and a bottom portion in the side groove. It has the functions of an installed permeable drainage pipe, fine sand filled above the permeable drainage pipe in the gutter, and a dam to prevent the outflow of the fine sand, and can pass through the permeable drainage pipe. It is characterized in that it is provided with a partition plate for partitioning the extending direction of the gutter.

In the present invention, when small pieces of resin or chips generated from artificial turf flow into the gutter together with rainwater, the rainwater mixed with the small pieces permeates the fine sand, and only the rainwater is drained to the main drainage ditch through the permeable drainage pipe. Rainwater that does not flow into the permeable drainage pipe is drained to the main drainage ditch through the bottom of the gutter. At this time, the small pieces that have flowed into the gutter do not reach the permeable drainage pipe, and many small pieces can be collected at the surface layer portion of the fine sand.
In this way, the fine sand can have a filter effect on the small pieces, and the amount of small pieces collected by the conventional filtration mesh of the permeable drainage pipe can be significantly reduced. Therefore, it is possible to suppress the discharge of small pieces together with rainwater from the permeable drainage pipe or the bottom to the main drainage ditch, and it is possible to prevent the small pieces from flowing out of the artificial turf site.

Further, when collecting the small pieces that have flowed into the gutter, the work of removing the small pieces accumulated on the fine sand and the work of replacing the fine sand as needed are sufficient. Therefore, the clogging of the filtration mesh of the permeable drainage pipe is reduced as in the conventional case, and the cleaning work can be reduced, so that the maintenance work such as cleaning can be reduced.
Moreover, in the present invention, since the occurrence of clogging of the filtration mesh of the permeable drainage pipe can be suppressed as described above, the rainwater flowing into the gutter can be reliably drained from the permeable drainage pipe and the bottom. Therefore, it is possible to prevent rainwater and small pieces from overflowing from the gutters to the artificial turf.

Further, the drainage structure of the artificial turf according to the present invention may be characterized in that the fine sand has a uniform particle size.

In this case, it is possible to secure voids between the grains by making the grain size of the fine sand uniform, and it is possible to sufficiently allow rainwater to permeate even during heavy rainfall.

Further, the drainage structure of the artificial turf according to the present invention may be characterized in that the partition plate is provided at a position lower than the upper end of the gutter.

In this case, when the amount of continuous rainfall is extremely large as in the case of a typhoon, the area having fine sand partitioned by the partition plate is passed over the partition plate to the adjacent gutter region without fine sand. It can be leaked.

Further, the drainage structure of the artificial turf according to the present invention may be characterized in that the bottom of the gutter has water permeability.

In this case, of the rainwater that has flowed into the gutter, the rainwater that does not flow into the permeable drainage pipe can be permeated into the ground from the permeable bottom of the gutter and drained. Therefore, even if small pieces are mixed in the rainwater that has permeated into the ground, the small pieces stay in the ground under the artificial turf, so that the small pieces can be prevented from flowing out of the site.

Further, in the drainage structure of the artificial turf according to the present invention, the gutter has a first gutter close to the artificial turf and a second gutter on the opposite side of the first gutter across the artificial turf. It may be characterized by being provided.

In this case, when the amount of continuous rainfall is extremely high as in the case of a typhoon, the gutters are doubled, so the drainage of the artificial turf becomes insufficient and floods and inundation to the surrounding area are prevented. be able to.

Further, the artificial turf drainage system according to the present invention is an artificial turf drainage system having the above-mentioned artificial turf drainage structure, and sucks the fine sand mixed with small pieces flowing into the side groove from the artificial turf. It is characterized by being provided with a suction device and a sorting device for separating the gas-solid mixed phase fluid sucked by the suction device into the small pieces and the fine sand by the difference in specific gravity.

In the present invention, when cleaning the small pieces accumulated or mixed in the fine sand due to the inflow of rainwater into the side groove, the fine sand is sucked by using a suction device, taken out from the side groove, and taken out. The small pieces and fine sand are separated from the gas-solid mixed-phase fluid in which the small pieces and the small pieces are mixed by a sorting device having a sorting function using the difference in specific gravity. Then, the fine sand collected by the sorting device can be returned to the gutter as a filler and reused.
As described above, in the artificial turf drainage system of the present invention, fine sand can be collected as needed and small pieces can be easily removed by sorting. Further, since the ratio of the small pieces staying in the fine sand can be increased, the clogging of the filtration mesh of the permeable drainage pipe can be reduced, and the cleaning work can be reduced. Therefore, maintenance such as cleaning can be performed efficiently, and the work load required for the maintenance can be reduced.

According to the artificial turf drainage structure and the artificial turf drainage system of the present invention, maintenance work such as cleaning can be reduced, and small pieces flowing from the playground can be easily and reliably without letting rainwater flow out to the playground. Can be collected.

It is a top view of the drainage structure of the artificial turf according to the embodiment of this invention. It is sectional drawing of the line AA shown in FIG. It is sectional drawing BB shown in FIG. FIG. 3 is a cross-sectional view taken along the line CC shown in FIG.

Hereinafter, the artificial turf drainage structure and the artificial turf drainage system according to the embodiment of the present invention will be described with reference to the drawings.

As shown in FIGS. 1 and 2, the drainage structure 1 of the artificial turf according to the present embodiment is provided around the artificial turf. The drainage structure 1 of the present embodiment is applied to an artificial turf drainage system.
Reference numeral S in the figure indicates artificial turf. The artificial turf ground has a structure in which the artificial turf S is laid. In the artificial turf S, the turf is filled with granules (hereinafter referred to as small pieces F) in which sand, rubber chips, or the like are mixed.

The drainage structure 1 includes a gutter 2 having a water permeable function at the bottom, a water permeable drain pipe 3 installed at the bottom in the gutter 2, and fine sand 4 filled above the water permeable drain pipe 3 in the gutter 2. It also has a function of a dam for preventing the outflow of fine sand 4, and is provided with a partition plate 5 for partitioning the extending direction of the gutter 2 so as to be able to pass through the permeable drainage pipe 3.

The gutter 2 is connected to a main drainage groove (not shown) at the downstream end. The main drainage ditch may be an underdrain. The gutter 2 is arranged so as to be buried in the ground over a part or the whole circumference of the artificial turf ground. As shown in FIGS. 3 and 4, the gutter 2 is formed in a U-shaped cross section from a bottom wall 21 (bottom portion) and a pair of side walls 22 and 22 rising from both ends in the width direction of the bottom wall 21. .. The upper opening 2a of the gutter 2 is covered with a metal lid 23 made of concrete or hot-dip galvanized. The side wall 22 is provided so that the upper end 22a of the gutter 2 and the surface of the artificial turf S on the ground are flush with each other. Further, the gutter 2 is provided so as to form a slight downward gradient along the drainage direction.
The bottom wall 21 of the gutter 2 has water permeability, and rainwater that does not flow into the water permeable drain pipe 3 in the gutter 2 is drained from the bottom wall 21 to the ground on the lower surface side.

As the permeable drainage pipe 3, for example, a permeable corrugated pipe is used, and in the present embodiment, the two are arranged in the lateral direction and installed on the bottom wall 21 of the gutter 2. The permeable drainage pipe 3 is connected in the extension direction. The permeable drainage pipe 3 is provided in a state of being buried in fine sand 4 filled in the gutter 2. The water-permeable corrugated tube has, for example, a structure in which a mesh-like water-permeable surface is held by a spiral synthetic resin reinforcing material, or a structure in which a tubular portion having a large number of small holes is held by a spiral synthetic resin reinforcing material. Things can be adopted. Here, the mesh-shaped water-permeable surface and the small holes in the cylinder portion have an opening size such that the small pieces F mixed in the rainwater do not pass through.

The fine sand 4 filled in the gutter 2 is, for example, silica sand and has a uniform particle size. By making the grain size of the fine sand 4 uniform, it is possible to secure voids between the grains, and it is set so that sufficient water permeability is possible even during heavy rainfall. The particle size of the fine sand 4 is about 0.5 to 5 mm. The fine sand 4 is filled so that the upper surface 4a of the fine sand 4 is sufficiently higher than the upper end of the water permeable drainage pipe 3.

As shown in FIGS. 2 and 4, the partition plate 5 is formed of, for example, a material made of concrete or stainless steel, and is arranged in the gutter 2 at intervals on the upstream side and the downstream side in the extension direction of the gutter 2. .. The lower end 5a of the partition plate 5 is in contact with the upper surface 21a of the bottom wall 21 of the gutter 2, and the upper end 5b of the partition plate 5 is provided at a position lower than the upper end 22a of the side wall 22. The partition plate 5 is formed with a pair of circular insertion holes 51, 51 through which the permeable drain pipes 3 and 3 can be inserted. The outflow of the fine sand 4 filled in the area partitioned by the partition plates 5 and 5 to the outside of this area is prevented.

A sealing material (not shown) is interposed between the partition plate 5 and the inner surface of the gutter 2 to stop water in a liquid-tight state. Further, a sealing material (not shown) is interposed between the insertion hole 51 and the permeable drainage pipe 3 to pass through, and the water is stopped in a liquid-tight state. That is, it is prevented that the rainwater that has flowed into the area partitioned by the partition plates 5 and 5 leaks to the outside of the partition plates 5.

Next, the artificial turf drainage system provided with the drainage structure 1 described above will be described with reference to FIGS. 1 to 4.
The artificial turf drainage system is a suction device that sucks fine sand 4 mixed with small pieces F that have flowed into the side groove 2 from the artificial turf S, and a gas solid mixed fluid sucked by the suction device. It is equipped with a sorting device that separates the gas. As the sorting device, a device by specific gravity separation or centrifugal separation (Sacron or the like) can be adopted. Since gravel having a large particle size may also be mixed, it is preferable to classify the gravel and sand using a sieve having a size of, for example, about 0.5-2.0 mm.

In the artificial turf drainage system, when cleaning the small pieces F accumulated or mixed in the fine sand 4 due to the inflow of rainwater into the side groove 2, the fine sand 4 is sucked into the side groove 2 by using a suction device. The gas-solid mixed-phase fluid in which the fine sand 4 and the small piece F are mixed is separated from the small sand F and the fine sand 4 by a sorting device having a sorting function utilizing the difference in specific gravity. Then, the fine sand 4 collected by the sorting device can be returned to the gutter 2 as a filler and reused.

In addition to replacing the fine sand 4, the non-woven fabric and medium-sized small gravel (gravel) (20 mm or less) around the permeable drainage pipe 3 and the permeable drainage pipe 3 should be replaced as necessary. You may.

If the existing gutter is used and it is not a permeable gutter, a drainage mat is laid at the bottom and a permeable drainage pipe 3 is installed on the drainage mat to allow drainage in the gutter. It is preferable to secure.

Next, the operation of the artificial turf drainage structure 1 and the artificial turf drainage system described above will be described in detail with reference to the drawings.
In the present embodiment, as shown in FIGS. 1 to 4, when small pieces F such as resin small pieces and chips generated from artificial turf flow into the gutter 2 together with rainwater, the rainwater mixed with the small pieces permeates the fine sand 4. Only rainwater is drained to the main drainage ditch through the permeable drainage pipe 3, and rainwater that does not flow into the permeable drainage pipe 3 is drained to the main drainage ditch through the bottom wall 21 of the gutter 2. At this time, the small pieces F flowing into the gutter 2 do not reach the permeable drainage pipe 3, and many small pieces F can be collected at the surface layer portion of the fine sand 4.

In this way, the fine sand 4 can have a filter effect on the small pieces F, and the amount of small pieces collected by the conventional filtration mesh of the permeable drainage pipe can be significantly reduced. Therefore, it is possible to prevent the small piece F from being discharged from the permeable drainage pipe 3 and the bottom wall 21 to the main drainage ditch together with the rainwater, and it is possible to prevent the small piece F from flowing out of the site of the artificial turf S.

Further, in the present embodiment, when collecting the small piece F that has flowed into the gutter 2, the work of removing the small piece F accumulated on the fine sand 4 and the work of replacing the fine sand 4 as necessary are sufficient. Therefore, the clogging of the filtration mesh of the permeable drainage pipe 3 is reduced as in the conventional case, and the cleaning work can be reduced, so that the maintenance work such as cleaning can be reduced.

Moreover, in the present embodiment, since the occurrence of clogging of the filtration mesh of the permeable drainage pipe 3 can be suppressed as described above, the rainwater flowing into the gutter 2 is surely drained from the permeable drainage pipe 3 and the bottom wall 21. be able to. Therefore, it is possible to prevent rainwater and the small piece F from overflowing from the gutter to the artificial turf.

Further, in the present embodiment, the particle size of the fine sand 4 is uniform, and by making the particle size of the fine sand 4 uniform, voids can be secured between the grains, and rainwater can be sufficiently permeated even during heavy rainfall. be able to.

Further, in the present embodiment, since the partition plate is provided at a position lower than the upper end 22a of the gutter 2, when the continuous rainfall is extremely large as in the case of a typhoon, the fine sand partitioned by the partition plate 5 It is possible to pass above the partition plate 5 from the region having 4 and flow out to the region inside the gutter 2 without the adjacent fine sand 4.

Further, since the bottom wall 21 of the gutter 2 has water permeability, the rainwater that does not flow into the water permeable drainage pipe 3 among the rainwater that has flowed into the gutter 2 is grounded from the bottom wall 21 having water permeability of the gutter 2. It can be infiltrated and drained. Therefore, even if the small piece F is mixed with the rainwater that has permeated into the ground, the small piece F stays in the ground under the artificial turf, so that the small piece F can be prevented from flowing out of the site. ..

Further, in the artificial turf drainage system according to the present embodiment, the fine sand 4 can be collected as needed and the small pieces F can be easily removed by sorting. Since the ratio of the small piece F staying in the fine sand 4 can be increased, the clogging of the filtration mesh of the permeable drainage pipe 3 can be reduced, and the cleaning work can be reduced.
Therefore, maintenance such as cleaning can be performed efficiently, and the work load required for the maintenance can be reduced.

As described above, in the artificial turf drainage structure 1 and the artificial turf drainage system according to the present embodiment, the work required for maintenance such as cleaning can be reduced, and the small piece F flowing from the playground without causing rainwater to flow out to the playground. Can be easily and reliably recovered.

Although the drainage structure of the artificial turf and the embodiment of the artificial turf drainage system according to the present invention have been described above, the present invention is not limited to the above embodiment and can be appropriately changed without departing from the spirit thereof. ..

For example, the configuration of the side groove 2 of the drainage structure 1 of the present embodiment, the shape, the extension length, the dimensions, etc. of the permeable drainage pipe 3 can be appropriately set in consideration of the applied drainage capacity. For example, in the present embodiment, two permeable drainage pipes 3 are arranged in the gutter 2, but the number of installed drainage pipes 3 is not particularly limited and may be one, for example.

Further, the gutter 2 can be configured so that a first gutter closer to the artificial turf and a second gutter on the opposite side of the artificial turf across the first gutter are provided in a double manner.
In this case, when the amount of continuous rainfall is extremely large as in the case of a typhoon, the gutters (first gutter and second gutter) are doubled, so that the drainage of the artificial turf becomes insufficient and the flood occurs. It is possible to prevent flooding to the surrounding area.

Further, the particle size of the fine sand 4 filled in the gutter 2 is not limited to being uniform.

Further, in the present embodiment, the inside of the gutter 2 is partitioned by a pair of partition plates 5, 5, but such a partition plate 5 can be omitted. Further, the position of the upper end 5b of the partition plate 5 is provided at a position lower than the upper end of the gutter 2 (the upper end 22a of the side wall 22), but the present invention is not limited to this, and the upper end 5b of the partition plate 5 and the upper end of the gutter 2 are not limited to this. The positions of 22a may be flush with each other.

In addition, it is possible to replace the components in the above-described embodiment with well-known components as appropriate without departing from the spirit of the present invention.

1 Drainage structure 2 Gutter 3 Permeable drainage pipe 4 Fine sand 5 Partition plate 5b Top 21 Bottom wall (bottom)
F Small piece S Artificial turf

Claims (6)

It is a drainage structure of artificial turf provided around the artificial turf.
A gutter with a water permeable function on the bottom,
A permeable drainage pipe installed at the bottom of the gutter,
Fine sand filled up to the top of the permeable drainage pipe in the gutter,
A partition plate having a function of a weir to prevent the outflow of fine sand and partitioning the extending direction of the gutter so as to pass through the permeable drainage pipe.
Drainage structure of artificial turf characterized by being equipped with. The drainage structure of artificial turf according to claim 1, wherein the fine sand has a uniform particle size. The artificial turf drainage structure according to claim 1 or 2, wherein the partition plate is provided at a position lower than the upper end of the gutter. The drainage structure of artificial turf according to any one of claims 1 to 3, wherein the bottom of the gutter has water permeability. 2. The drainage structure of the artificial turf according to any one of 4. An artificial turf drainage system provided with the artificial turf drainage structure according to any one of claims 1 to 5.
A suction device that sucks the fine sand mixed with small pieces that have flowed into the gutter from the artificial turf.
A sorting device that separates the gas-solid multiphase fluid sucked by the suction device into the small pieces and the fine sand by the difference in specific gravity.
An artificial turf drainage system featuring.

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