JPH07150513A - Waste water system for sport ground, porous-layer forming unit used for said system, pipe unit used for waste water system for sport ground and execution method of sport ground - Google Patents

Abstract

PURPOSE: To carry out sprinkling to vegetation together with rapid drainage, to prevent the injury of a player by a treading-down effect, to maintain vegetation in a cold district and in winter and to shorten the execution of works of a sport ground. CONSTITUTION: A waterproof layer 2 is executed on the surface 10 of foundation soil 1, and a pipe unit layer 3, in which a pipe unit 30, in which a drain pipe 31 and a sprinkling pipe 32 are combined, is disposed, is executed on the layer 2. A porous layer forming material 45 composed of a granular material is spread all over the frame body 441 of a porous-layer forming unit 44 and a porous layer 4 is executed, and vegetation such as a turf is executed on the layer 4.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to the construction of various sports grounds such as soccer fields, rugby fields, tennis courts, golf courses and the like, which have natural vegetation outdoors or indoors.

[0002]

2. Description of the Related Art Sports grounds, especially sports grounds with natural vegetation such as lawns, evaluate the soil at the location, plow the surface, sow seeds or lawn soil in the competition area, and It is basically created by leaving the condition of the soil surface to natural control. In most places, the surface soil is replaced with a better one to improve the conditions, but nevertheless the drainage properties at that place are not really improved. In such a sports ground, the center of the ground is usually slightly higher, and a slope of about 24 inches is formed toward the periphery, so that water flows off on the surface.

As players and sports enthusiasts testify, many colleges, high schools, and other sports grounds become flooded and muddy when it rains. One way to solve this problem is to use plastic grass (artificial grass)
Has been done. However, this plastic turf is costly and very slippery in the event of rain, which can cause serious injury to the player.

[0004]

SUMMARY OF THE INVENTION A first object of the present invention is to provide a sports ground of natural vegetation in which water can be quickly drained without being soaked or muddy even if it rains. A second object of the present invention is to prevent injury to the player due to the soil compaction effect in a natural vegetation sports ground for quick drainage.
It is to provide a sports ground with a lower structure that maintains appropriate elasticity. A third object of the present invention is to provide such a sports ground and also to irrigate the vegetation as needed. A fourth object of the present invention is to enable vegetation to be maintained without dying even in cold regions and winter. A fifth object of the present invention is to make it possible to complete the construction of a spare ground requiring vegetation in a short period of time.

[0005]

In order to achieve the above-mentioned first object, the invention according to claim 1 of the present application is a method of digging a predetermined depth from a ground surface where natural vegetation such as lawn is applied. A drainage system for a sports ground constructed on a ground soil, comprising a waterproof layer for waterproofing the surface of the ground soil, and a pipe unit having a drainage function arranged in the pipe unit layer located on the waterproof layer. , A non-soil porous layer located above the pipe unit layer and below the ground surface, and the water that permeates from the ground surface is discharged to the outside by the pipe unit through the porous layer. The structure is that Further, in order to achieve the above first and second objects, the invention according to claim 2 is the structure of the above claim 1,
The non-soil porous layer has a structure in which granular materials having water absorbency and no compaction effect are spread. Further, similarly, in order to achieve the above first and second objects, the invention according to claim 3 has the configuration according to claim 2, wherein the granular material is mixed with granular fertilizer. Similarly, in order to achieve the above first and second objects, the invention according to claim 4 is the structure of claim 1, 2 or 3, wherein the porous layer is a flow of water during irrigation or drainage. Has a vertical slot that regulates the vertical direction. Similarly, in order to achieve the above first and second objects, claim 5
The invention described in (4) has a structure according to claim 4, wherein the vertical slot is divided into pores having a size into which a root of vegetation on the ground surface can enter. Similarly, in order to achieve the above first and second objects, the invention according to claim 6 is the structure according to claim 4 or 5, wherein the porous layer is a water retention layer and a rooting layer in order from the bottom. And the seedbed layer, and the vertical slot is provided in the rooting layer portion. In order to achieve the above-mentioned first, second and third objects, the invention according to claim 7 is the structure according to claim 1, wherein the pipe unit has a watering function as well as the drainage function, and is porous. It is configured to be able to supply moisture to the layer. In order to achieve the above first, second and third objects, the invention of claim 8 is the structure of claim 7, wherein the pipe unit includes a drainage pipe and an irrigation pipe. The water discharged from the plant is further supplied to the irrigation pipe for recycling. In order to achieve the first, second, third and fourth objects, the invention of claim 9 is the structure of claim 7 or 8, wherein the pipe unit is a heat unit for heating water to be supplied. It has a configuration of being equipped. Further, in order to achieve the first object, the invention of claim 10 is the same as that of claim 1,
The configuration of 2, 3, 4, 5, 6, 7, 8 or 9 has a configuration in which an auxiliary drainage pipe is embedded in the porous layer. In order to achieve the above first, second and fifth objects, the invention according to claim 11 is the invention according to claim 4,
A porous layer forming unit for forming a porous layer in the constitution described in 5 or 6, comprising a frame body formed so that necessary portions have water permeability, and a vertical slot portion held by the frame body. It has a configuration in which it is constructed in advance, assembled in another place, transported to a sports ground, and constructed. Similarly, in order to achieve the above first, second and fifth objects, the invention according to claim 12 is
The structure of claim 11 has a structure in which the porous forming unit is formed of paper or plastic in which holes are formed where necessary. In order to achieve the above-mentioned first, third and fifth objects, the invention according to claim 13 relates to the ground soil at a position dug to a predetermined depth from the ground surface where natural vegetation such as lawn is applied. A pipe unit used in a drainage system for a sports ground constructed in, which has a drainage port through which drainage flows in and communicates with an external drainage facility, and a water supply port through which water supplied from a water supply line flows out. In a pipe unit in combination with an irrigation pipe having, one pipe has a recess, the outer diameter of the other pipe is a size that fits in this recess, and the other pipe is fitted into the one pipe. As a result, both have been combined. Similarly, in order to achieve the fifth object, the invention according to claim 14 is a method for constructing a sports ground where natural vegetation such as lawn is applied, and is formed to have water permeability. The inside of a box-shaped frame whose upper surface is an opening is pre-filled with a growth material, and seeds are seeded near the surface of the filled growth material to grow vegetation in advance, and the frame body in this state is placed at the place of construction. A large number of plants are carried in, lined up on the ground soil and spread, and then covered with a surface layer having a predetermined thickness.

[0006]

EXAMPLES Examples of the present invention will be described below. Figure 1
FIG. 3 is a schematic cross-sectional view illustrating the structure of the first embodiment of the sports ground drainage system of the present invention. Figure 2
It is a cross-sectional schematic diagram explaining the pipe unit in the drainage system shown in FIG. FIG. 3 is a schematic perspective view of a frame body that constitutes the porous layer forming unit of the drainage system of FIG. 1. FIG. 4 is a schematic perspective view illustrating the configuration of the vertical slot portion in the porous layer forming unit of the drainage system of FIG. 1. FIG. 5 is a plan view illustrating the outline of the irrigation / drainage line when the drainage system shown in FIGS. 1 and 2 is adopted in a soccer field. FIG. 6 is a schematic plan view illustrating the arrangement position of the porous layer forming unit.

First, the basic structure of the drainage system for a sports ground according to the first embodiment will be described with reference to FIG. The drainage system shown in FIG. 1 is constructed on the ground soil 1 at a position dug to a predetermined depth from the ground surface on which natural vegetation such as lawn is provided, and the waterproof layer 2, the pipe unit layer 3, The porous layer 4 is basically formed of three layers.

The construction of the first embodiment will be described below while explaining an example of construction of the drainage system of this embodiment. First, a place where natural vegetation is required (hereinafter referred to as a vegetation area), out of places where a sports ground is constructed, is dug, for example, about 12 inches from the final ground surface. In addition, the bottom portion dug in this way is used as a base surface (see FIG.
(Indicated by medium code 10).

Then, the waterproof layer 2 is first applied on the base surface 10. In this embodiment, a plastic sheet having a thickness of 6 mm is used as the waterproof layer 2.
It is laid so as to cover the entire vegetation area. In practice, a large number of sheets of a predetermined size are sewn with their ends overlapped with each other to cover the ground surface 10 of a large vegetation area. In addition, as shown in FIG. 2, the waterproof layer 2
Is constructed in a state where it covers the part of the peripheral wall 11 of the dug up vegetation area. That is, the waterproof layer 2 made of the plastic sheet or the like is formed from the corners of the base surface 10 to the peripheral wall 11.
It extends vertically along and extends vertically to reach near the ground surface. In addition, since the outer peripheral drainage pipe 5 described later is actually buried outside the peripheral wall 11, the outer peripheral drainage pipe 5 is buried by digging in a slightly larger area than the vegetation area to form the peripheral wall 11, and then the vertical wall is formed. The partial waterproof layer 2 is laid.

Next, the pipe unit 30 is constructed. The pipe unit 30 in the present embodiment has a watering function as well as a watering function.
1 and the irrigation pipe 32 are combined and constructed as follows. Details of the pipe unit 30 are shown in FIGS.
Explaining with reference to FIG. 5, the pipe unit 30 is configured by combining a drainage pipe 31 and an irrigation pipe 32 in a grid pattern as shown in FIG. As shown in FIGS. 1 and 2, the drainage pipe 31 is on the lower side, and the irrigation pipe 32 is disposed on the upper side so as to intersect at a right angle. 1 is a sectional view of the upper irrigation pipe 32 in the longitudinal direction, and FIG. 2 is a sectional view of the lower drainage pipe 31 in the longitudinal direction.

Both the drain pipe 31 and the irrigation pipe 32 are tubular with a circular cross section, and the diameter of the drain pipe 31 is slightly larger. Specifically, for example, the drainage pipe 31 has an inner diameter of 3 inches and an outer diameter of about 4.5 inches, and the irrigation pipe 32 has an inner diameter of 2 inches and an outer diameter of about 2.5 inches. As shown in FIGS. 1 and 2, the drainage pipe 31 has a recessed portion 3 having a shape adapted to the outer diameter of the irrigation pipe 32.
11 is provided on the upper part. Then, the irrigation pipe 32 is fitted and fixed in the concave portion 311, so that the drainage pipe 31 and the irrigation pipe 32 are fixed to each other in a state of intersecting each other at a right angle.

As shown in FIG. 2, the recess 311 is shaped so as to fit the irrigation pipe 32 to a depth of at least half of the recessed portion 311 so that sufficient fixing strength can be obtained. In addition, the drainage pipe 31 and the irrigation pipe 32
Is made of a slightly deformable material such as vinyl chloride, and when the irrigation pipe 32 is fitted into the recess 311,
The recess 311 is slightly pushed open and the irrigation pipe 32 is fitted. The irrigation pipe 32 is fixed with sufficient fixing strength by the elasticity of the recess 311 or the like. Moreover, you may use an adhesive material etc. as needed. In this embodiment, as described above, the recess 311 is provided on the drain pipe 31 and the irrigation pipe 32 is fitted into the recess 311. However, the reverse case is naturally possible. That is, the irrigation pipe 32 may be provided with the recess 311 and the drainage pipe 31 may be fitted therein.

As shown in FIGS. 1 and 2, the drainage pipe 31 is provided with a drainage port 312 at a position lower than the center position of the drainage pipe 31. The drain port 312 has a diameter of about 0.5 inch and is provided on both sides along the length direction of the pipe at intervals of about 6 inches (distance between centers of drain ports). The drainage pipe 31 is covered with a mesh 313 except for the connection with the irrigation pipe 32 and the like.
As a result, the surrounding sand or gravel does not flow into the drain pipe 31 from the drain port 312, but only the water flows. The mesh roughness of the mesh 313 is appropriately determined according to the roughness of the sand or gravel laid on the pipe unit layer 3. Such a drainage pipe 31 extends along one direction of the vegetation area and has a terminal plate 31 at its end.
Closed at 4. That is, as shown in FIG. 2, the terminal plate 314 is arranged so as to come into contact with the waterproof layer 2 provided vertically along the peripheral wall 11. The terminal plate 314 has a terminal drainage port 315 at a position approximately at the center thereof.

The terminal drainage port 315 is connected to the outer peripheral drainage pipe 5 buried outside the vegetation area. The outer peripheral drainage pipe 5 is embedded in a direction perpendicular to the lengthwise direction of the drainage pipe 31, and as shown in FIG.
5 has an inlet 51 connected to it. The waterproof layer 2 has an opening at the connecting portion between the end discharge port 315 and the inflow port 51, and the water inside the drainage pipe 31 passes through the end drainage port 315 and the inflow port 51 to the outer peripheral drainage pipe 5. It is constructed so that it can flow in. The opening of the waterproof layer 2 is sealed so that there is no water leakage. The end of the outer peripheral drainage pipe 5 is
The inflowing wastewater is connected to a water reservoir (not shown in FIGS. 1 and 2) and is configured to be temporarily stored in this water reservoir before being discharged to an external drainage facility such as a public sewerage facility.

On the other hand, the irrigation pipe 32 fitted in the drainage pipe 31 has a water supply port 321 at a position slightly lower than the center height. As shown in FIGS. 1 and 2, the water supply port 321 is located in a portion fitted into the recess 311 of the drainage pipe 31, and the water inside the irrigation pipe 32 passes through the water supply port 321 to drain the drainage pipe 31. It is constructed so as to be supplied to the inside of. The water supply port 321 has a diameter of about 0.5 inch, and as shown in FIG.
It is provided on both sides of 2.

The water supply port 321 is provided at the intersecting portion with the drainage pipe 1 in the lengthwise direction of the irrigation pipe 32, and therefore its arrangement interval corresponds to the arrangement interval of the drainage pipe 31. Specifically, the intervals are about 1.5 meters as described above. The water supply port 321 is located in the center of the drainage pipe 31 along the length direction of the irrigation pipe 32. In addition, the irrigation pipe 32 is connected to a water supply line described later, and is constructed so that irrigation is appropriately performed as needed.

The pipe unit 30 of the present embodiment having the above-described structure may be assembled and carried in in advance as described above in a factory or the like, or may be carried in for each pipe and assembled at a construction site. In any case, the pipe unit 30 assembled in this way is placed on the waterproof layer 2 described above, and is filled with predetermined sand or gravel so as to fill the gap of the pipe unit 30. This completes the pipe unit layer 3. The sand or gravel of the pipe unit layer 3 is selected to have sufficient water permeability so that irrigation and drainage can be exchanged with the later-described porous layer 4 arranged in the upper layer.

The porous layer 4 is formed on the pipe unit layer 3 as described above. The porous layer 4 is layered into a water retention layer 41, a rooting layer 42, and a nursery layer 43 in this order from the bottom. In this embodiment, the porous layer forming unit 44 and the porous layer forming unit 44 are arranged. It is mainly constituted by the porous layer forming material 45 filled in the.

First, the porous layer forming unit 44 will be described. The porous layer forming unit 44 includes a frame body 441 filled with the porous layer forming material 45, and the frame body 44.
It is mainly composed of a vertical slot portion 442 held at 1. The porous layer forming unit 44 having the following structure
In the present embodiment, all are basically formed of water-permeable "paper".

The frame body 441 is a box-shaped member having a rectangular parallelepiped shape or a cube shape whose upper surface is an opening.
As shown in FIG. 3, many pieces are lined up and lined up. The size of one frame is about 8 yards × 4 yards and the height is about 6 inches. For this frame 441, it is possible to use the same paperboard as that typically used for a corrugated box. In addition, at the time of construction, the side surfaces of the respective frame bodies 441 are joined to each other by a method such as bonding with an adhesive material.

Then, as shown in FIG.
1. A vertical slot portion 442 is provided at a predetermined height position inside 1.
Are arranged. That is, on the bottom surface of the frame body 441, support pieces 443 having a predetermined height are erected at predetermined intervals, and vertical slot portions 442 are arranged so as to be supported by the support pieces 443. That is, in this embodiment, the frame body 441 holds the vertical slot portion 442 through the support piece 443. As shown in FIG. 4, the vertical slot portion 442 is formed by arranging a large number of vertical partition plates 444 at predetermined intervals to form a large number of vertical slots 445 having a width of about 1/8 inch. The vertical slot 445 has a depth (height) of 2
Inch or less.

The vertical slot 445 in this embodiment is
As shown in FIG. 4, it has a honeycomb shape. That is, the vertical slot 445 is divided by a large number of holes 446 arranged side by side. Such a honeycomb structure has vertical slots 4
This can be achieved by inserting and arranging thin pipe-shaped members in 45, but a technically equivalent can also be constructed by stacking and arranging and joining the paperboards used in cardboard boxes. That is, a paperboard used for a cardboard box is formed by sandwiching corrugated paper between two thick papers, and is held in a posture such that the cross-section (thickness) direction is horizontal. Then, by stacking a large number of them, the vertical slot portion 442 of this embodiment can be constructed. Incidentally, the above-mentioned support piece 443
Can also use the same paperboard used in cardboard boxes as well. At this time, it is more preferable to make the depth direction of the pores vertical so as to create a vertical water flow.

The vertical slot 442 may be formed not only in the rooting layer 42 but also in the water retaining layer 41. In this case, the width of the vertical slot is changed accordingly. The part of the rooting layer 42 should be small to some extent in order to catch the root, but the part of the water retaining layer 41 is sufficient if vertical flow of water is secured, so the width of the slot is considerably large. I don't care.

The porous layer forming unit 44 having the above-mentioned structure is constructed on the above-mentioned pipe unit layer 3, but the frame body 441 and the vertical slot portion 442 are prepared in advance in a factory or the like as shown in FIG. Then, the work is basically brought to the construction site, and the construction is basically completed only by arranging the pipe unit layers 3 on which the construction has been completed in a line. Frame 41
1 Mutual joining may be carried out in advance at the factory and a size of a predetermined area may be manufactured in advance.
You may carry in the single porous layer formation unit 44 which consists of the frame body 411 and the vertical slot part 442 to many construction sites, and may join it in a construction site.

By filling the porous layer forming unit 44 thus constructed with the porous layer forming material 45, the porous layer 4 of this embodiment is formed. The porous layer forming material is specifically sand, peat moss, perlite, foamed brick, permiculite, or the like. For example, about 50% sand and 25% peat moss
A mixture of about 25% pearlite is preferably used. Further, as the porous layer forming material 45 in the seed bed layer 43, if the grains are large, the seeds sprinkled will flow with water, so a material with relatively small grains is used according to the size of the seeds. Further, the amount of sand mixed may be increased.
Further, as is clear from the above description, “porous” in the “porous layer” means that there is a sufficient small gap as the lower layer structure of the vegetation on the ground surface, such as when a granular material is filled, and the gap It means that water can move through the part.

In this way, by filling the predetermined porous layer forming material 45 with a predetermined thickness, the porous layer 4 of this embodiment is completed. In this state, the construction of the drainage system of this embodiment is almost completed, and after the necessary construction of the surface layer 46 is finished, the vegetation of the sports ground is finally completed. That is, for example, when vegetation such as lawn is started by sowing seeds, the seeds are sowed at a predetermined depth position of the nursery layer 43 and germinated. In this case, in the case of vegetation such as lawn, sand is sprinkled on the surface layer 46 with a predetermined thickness. Further, when the lawn or the like is directly planted, the lawn cut into a predetermined size with the soil attached is laid side by side on the porous layer 4. In any case, the root of the vegetation extends downward and enters the vertical slot 445 of the vertical slot portion 442, and further the vertical slot 445.
It crawls through and reaches the lower water retention layer 41.
Then, the water accumulated in the water retaining layer 41 is absorbed to efficiently promote the growth of vegetation.

For example, the pipe unit layer 3 needs to have a thickness of at least 5 inches, and the porous layer 4 needs to have a thickness of about 3 to 4 inches. However,
It goes without saying that these values change depending on the amount of precipitation at the construction site and the capacity of the drainage facility. In the porous layer 4, the water retention layer 41 is about 1.5 to 2 inches, the rooting layer 42 is about 1 to 1.5 inches, and the nursery layer 43 is about 0.8 inches.
It is about 1 inch. Needless to say, these values also change depending on the type of vegetation to be raised.

In the above embodiment, the porous layer forming unit 44 is basically formed of "paper", but the unit is not limited to "paper" and may be plastic with holes formed in necessary places. . "Perforated" means that a water-impermeable plastic is perforated to ensure water permeability, and in particular, it is essential to perforate the bottom of the box-shaped frame 441. is there. Needless to say, the size and interval of the holes are appropriately determined in relation to the required water passage rate. In addition,
Although a cardboard box may be formed of a plastic material, the plastic plate material used in such a plastic cardboard box has the same porous material as that of the paper cardboard box. Layer forming unit 4
4 can be preferably used for forming 4. Furthermore, the porous forming unit 44 can be made of wood, metal, or the like, or can be made of a material such as expanded polystyrene. still,
Also in the case of these materials, it is necessary that the bottom of the frame body 441 has a hole.

Next, a case where the system of this embodiment is adopted in a soccer field as an example of a sports field will be described with reference to FIG. That is, FIG. 5 shows a layout of a drainage system suitable for an outdoor or indoor soccer field. As shown in FIG. 5, the drainage pipe 31 and the irrigation pipe 32 are combined in a grid pattern to cover a vegetation area that is rectangular as a whole. Incidentally, FIG.
The middle and vegetation area is an area surrounded by a thick solid line 11. It should be noted that not all the pipes are drawn in FIG. 5, but they are drawn thin to avoid complication.

First, the drainage pipes 31 are arranged in parallel at predetermined intervals along the direction of the short side of the rectangle. As shown in FIG. 5, the outer peripheral drainage pipe 5 is arranged so as to extend on both sides along the direction of the long side of the rectangle, and further, a pipe 6 connecting the outer peripheral drainage pipes 5 on both sides outside the vegetation area. Is provided. At the end of the outer peripheral drainage pipe 5,
A water reservoir 7 is provided, and the drainage is discharged to an external drainage facility such as a public drainage facility via the water reservoir 7. Further, the irrigation pipes 32 are arranged at predetermined intervals along the long side direction of the rectangle. This irrigation pipe 3
2 is connected to a water supply line 8 arranged along the direction of the short side of the rectangle outside the vegetation area, and the water supply line 8 is provided with a water supply tank, a water supply pump, a control valve, etc. (not shown). ing.

The arrangement intervals of the drainage pipe 31 and the irrigation pipe 32 will be described. The drainage pipe 31 has an arrangement interval of about 1.5 meters, and the irrigation pipe 32 has an arrangement interval of about 6.5 meters. In addition, this arrangement interval is an interval at the center of each pipe. Needless to say, these arrangement intervals are appropriately changed according to the data such as the amount of precipitation at the construction site. Furthermore, in the embodiment shown in FIG. 5, the auxiliary drainage pipe 9 is buried outside the vegetation area, and the auxiliary drainage is performed around the ground.
The pipes and pipes shown in FIG. 4 are all buried in the ground and are not exposed on the ground surface.

Next, the arrangement position of the porous layer forming unit 44 will be described with reference to FIG. In FIG. 6, a rectangular portion shown by a thick solid line indicates the frame body 441 in the porous layer forming unit 44 of FIG. As shown in FIG.
It is preferable that the porous layer forming unit 44 is arranged above the intersection of the drainage pipe 31 and the irrigation pipe 32 with the center of the frame body 441 positioned.

Next, the operation of the drainage system for a sports ground according to this embodiment having the above-mentioned structure will be described. First, in FIGS. 1 and 2, rain falling on the ground and sprinkled water pass through the porous layer 4 and reach the pipe unit layer 3. Then, it descends through the gap of sand or gravel in the pipe unit layer 3, and gradually accumulates on the lowermost waterproof layer 2. The water level of the water accumulated on the waterproof layer 2 is the drain pipe 31.
Above the drain port 312, the water enters the drain pipe 31 from the drain port 312 and accumulates therein.

When the amount of water further increases and water accumulates and the water level inside the drainage pipe 31 reaches the height of the terminal drainage port 315, the internal water flows from the terminal drainage port 315 to the outer peripheral drainage pipe 5.
Is discharged to. The discharged water is sent to the water reservoir 7 shown in FIG. 5 by the outer peripheral drain pipe 5, and is discharged to an external drainage facility such as a public drainage facility by a drainage pump (not shown). It is necessary to increase the drainage amount of a drainage pump (not shown) during a period of heavy rainfall such as the rainy season. You can control the drainage pump manually while watching the rainfall amount,
The control may be automatically performed by a signal from a water level sensor provided in the water reservoir 7.

In such a drainage action, in this embodiment, since the porous layer 4 is formed on the pipe unit layer 3, the water on the ground surface quickly reaches the pipe unit layer 3, and therefore a large amount of water is obtained. Even if there is precipitation, there will be no water pool on the ground surface and no mud on the ground surface. When there is a large amount of precipitation temporarily, the capacity of the drainage pump cannot catch up, and the water level of the water accumulated on the waterproof layer 2 may penetrate through the pipe unit layer 3. In such a case, the porous layer If there is no 4, there will be a pool of water that springs out on the ground surface. In this embodiment in which the porous layer 4 exists, even if the porous unit 4 penetrates through the pipe unit layer 3, the porous layer 4 exists on the pipe unit layer 3, so that water does not accumulate on the ground surface. Then, by appropriately determining the thickness of the porous layer 4 while referring to the annual rainfall at that location,
It is possible to prevent water from seeping over the surface of the ground. Further, the porous layer 4 has the vertical slot portion 4 as described above.
Since 42 is provided, the flow of water to the lower pipe unit layer 3 is promoted, and the lateral flow of water, which has been a problem in conventional sports ground drainage, is suppressed, resulting in efficient drainage. You can do it.

Next, the case of watering the vegetation will be described. When performing irrigation, the control valve provided in the water supply line 8 is opened, and water is supplied to the irrigation pipe 32 by the water supply pump. The water supplied to the irrigation pipe 32 is as shown in FIGS.
As shown in, the water enters the drainage pipe 31 through the water supply port 321 and accumulates in the drainage pipe 31. And drain pipe 3
When the water level accumulated in 1 reaches the height of the drain port 312, it is discharged from the drain port 312 and accumulated on the waterproof layer 2.
The accumulated water permeates the water retaining layer 41 in the porous layer 4 through the sand and gravel in the pipe unit layer 3 to retain the water.
The term "permeation" is used to mean not only the case where water moves upward due to a so-called permeation phenomenon, but also the case where the water vaporizes and reaches the water retaining layer 41 as water vapor.

The irrigation is judged to be necessary by observing the amount of precipitation data and the state of vegetation. However, a water sensor is provided in the system of this embodiment, and the irrigation is controlled by the signal from the water sensor. May be started. The moisture sensor is preferably provided in the porous layer 4, and preferably at a predetermined height in the water retention layer 41 or the rooting layer 42.

In this way, sufficient water is secured in the water retaining layer 41, and this water is absorbed by the roots of the vegetation extending to the rooting layer 42. As a result, the vegetation on the ground surface can ingest sufficient water even in the dry season. At this time, since the vertical slot portion 442 is provided in the rooting layer 42, the upward flow of water from the water retention layer 41 is promoted,
Water can be efficiently supplied to the roots. In addition, the vertical slot 44
Since 5 is divided into the pores 446 and the roots are configured to enter the pores 446, the roots are extended along the inside of the pores 446 and are captured by this portion. . As a result, the vegetation on the ground surface has a very high rooting strength, and the vegetation is not easily peeled off even when the player makes a vigorous exercise on the ground surface.

Further, since the porous layer 4 of this embodiment is formed of a non-soil material, that is, a granular material such as peat moss, perlite, foam brick, and permiculite as described above, it can be used for a long period of time. There is no compaction effect and moderate elasticity is always maintained. Therefore, the player can be prevented from being injured or tired. On the other hand, when a soil-based material such as black soil or mulch is used, the soil is gradually hardened and loses elasticity, and the player is likely to be injured or tired when falling.

Next, second and third embodiments of the present invention corresponding to claims 9 and 10 will be described. 7 and 8
9 is a schematic cross-sectional view for explaining the structure of a second embodiment of the drainage system for sports grounds of the present invention, and FIG. 9 is a schematic plan view when the system of the second embodiment is adopted in a soccer field. 10 and 11 are schematic sectional views for explaining the structure of the third embodiment. Note that, as in FIGS. 1 and 2 described above, FIGS.
8 is a sectional view in the length direction of the lower drainage pipe 31.

First, the embodiment shown in FIGS. 7 and 8 employs a heat unit for heating water supplied to the irrigation pipe (claim 9), and the auxiliary drainage disposed in the porous layer. The point that a pipe is adopted (claim 10) is mainly different from the above-mentioned first embodiment. That is, as shown in FIGS. 7 and 8, in this embodiment, the auxiliary drainage pipe 47 is provided in the porous layer 4. This auxiliary drain pipe 47
Has an inner diameter of about 2 inches and has a rib 471 for reinforcement as shown in FIG. The auxiliary drainage pipe 47 has an auxiliary drainage port 472 through which the water in the porous layer 4 flows as drainage. Auxiliary drainage port 4
The reference numeral 72 is a slot shape having a width of 2 mm and a length of about 2 cm, and is provided at intervals of 1.5 cm, for example. Furthermore, this auxiliary drainage pipe 4
7 is also a water-permeable mesh 473 like the drain pipe 31.
The material in the porous layer 4 does not flow into the auxiliary drainage pipe 47, but only drainage flows in.

The frame 44 of the porous layer forming unit 44
1 and the waterproof layer 2 are provided with through holes through which the auxiliary drainage pipes 47 penetrate, and the auxiliary drainage pipes 47 are arranged so as to be inserted into the through holes. In addition, the auxiliary drainage pipe 4
A communication pipe 48 is connected to the end of 7 as shown in FIG. The communication pipe 48 is connected to an outer drain pipe 52 arranged further outside the outer peripheral drain pipe 5 arranged at the end of the drain pipe 31, whereby the water in the auxiliary drain pipe 47 is connected to the outer drain pipe 52. It is designed to be discharged to. An end cap 49 is provided at the upper end of the portion branched upward from the communication pipe 48. The end cap 49 is provided for inspecting the outer drainage pipe 52 and the like.

Such an auxiliary drain pipe 47 is very suitable for a sports ground constructed in a place where a large amount of precipitation is temporarily present. That is, when there is a large amount of precipitation temporarily, it is not possible to cover the drainage only via the drainage pipe 31, and the water level accumulated on the waterproof layer 2 rises and penetrates the porous layer 4. Can be. In this case, water will accumulate on the surface of the ground, and the problems of the prior art will not be solved. However, when the auxiliary drainage pipe 47 is arranged as described above, the drainage capacity is doubled, and water is not accumulated on the ground surface even when there is a sudden sudden rainfall.

Further, in this embodiment, a heat unit for heating the water supplied to the irrigation pipe 32 is provided. It is important to preheat the water supplied to the ground in the case of a ground in a cold region or maintenance of the ground in winter. Regarding the configuration of the heat unit,
This will be described with reference to FIG. In FIG. 9, the ground is divided into four parts for convenience of explanation. The upper left is an outline of the irrigation pipe 32, the upper right is an outline of the auxiliary drainage pipe 34, and the lower left is an outline of the porous layer unit 44. The lower right shows an outline of the water circulation system including the irrigation pipe 32 and the drainage pipe 31.

In FIG. 9, the four sections are:
Each of them constitutes an independent water circulation system, and the heat unit 33 is provided on each water circulation path. That is, as shown in the lower right part of FIG. 9, the outer peripheral drainage pipe 5 connected to the end of the drainage pipe 31 is finally connected to the heat unit 33. And the heat unit 3
From 3, the irrigation pipe 32 is branched and arranged as shown in the figure. The number of irrigation pipes 32 and drainage pipes 31 is actually larger than that shown in FIG. The heat unit 33 is, specifically, a water tank for temporarily storing water for heating, a heating device for heating water in the water tank by thermal power using gas or kerosene as a fuel, and a control device including a temperature sensor and the like. Etc.

By adopting such a heat unit 33, the temperature of the water supplied to the irrigation pipe 32 can be optimized, thereby optimizing the temperature of the porous layer for growing vegetation. be able to. As a result, it becomes possible to grow vegetation that needs to be grown under a predetermined warm underground temperature condition even in cold regions and winter. For example, even if the lawn normally dies in winter, the heat unit 33 as described above can always maintain a lush state. Employing the heat unit 33 in the configuration in which the water from the drainage pipe 31 is recycled as described above has another effect that energy for heating can be saved in addition to saving water used.

As described above, in the embodiment shown in FIG.
Four water circulation systems, each consisting of a drainage pipe 31 and an irrigation pipe 32, are provided independently of each other. Each circulation system is provided with a pump unit, and water from each drainage pipe 31 is supplied. It is configured to deliver to each irrigation pipe 32. When the sports ground to be constructed becomes large, it becomes necessary to divide the ground into a plurality of parts and to arrange a pump unit for each, in view of the ability of the pump. The temperature sensor and the water level sensor described above may be arranged at the position indicated by 37 in FIG.

Next, a third embodiment shown in FIGS. 10 and 11 will be described. In the system of this embodiment, the drain pipe inner pipe 34 is provided inside the drain pipe 31. The other points are almost the same as those of the second embodiment. The inner pipe 34 of the drainage pipe is intended to improve the drainage capacity and to disperse the water in the drainage pipe 31 during irrigation. That is, as shown in FIGS. 7 and 8, the drain pipe inner pipe 34 is provided at an upper position inside the drain pipe 31, so that water is supplied from the water supply port 321 of the irrigation pipe 32 to the inside. Has become.

The drain pipe inner tube 34 has an inner diameter of about 2 inches, and has a water passage 341 for exchanging water with the outer drain pipe 31. Like the auxiliary drainage port 472 of the auxiliary drainage pipe 47, the water passages 341 are slot-shaped with a width of 2 mm and a length of about 2 cm, and are provided at intervals of 1.5 cm, for example. A pipe 342 is provided at the end of the drain pipe inner pipe 34. This pipe 342 penetrates through each of the openings provided in the terminal plate 314 of the drainage pipe 31 and the waterproof layer 2, and is connected to the outer peripheral drainage pipe 52 together with the communication pipe 48 similar to the second embodiment. There is. The terminal plate 341 and the penetrating portion of the waterproof layer 2 are sealed so that there is no water leakage.

In FIGS. 9 and 10, the drainage pipe 31
When the water level of the water accumulated inside rises, the water flows through the water inlet 341.
Is collected in the drain pipe inner pipe 34 via the pipe 342.
And is discharged to the outer peripheral drainage pipe 5. At this time, in this embodiment, instead of the terminal drainage port 315 shown in FIGS. 2 and 8, the drainage pipe inner pipe 34 and the pipe 342 having a large diameter are provided.
Is used to discharge the water in the drain pipe 31,
In addition, drainage efficiency has improved.

On the other hand, when water is supplied to the irrigation pipe 32, the supplied water flows out from the water supply port 321 and collects in the drain pipe inner pipe 34. This water flows out from the water passage 341 and collects in the drainage pipe 31, and supplies water to the porous layer 4 as described above. At this time, since the water supplied to the drainage pipe 31 is distributed through the drainage pipe inner pipe 34 in the lengthwise direction of the pipe and then supplied through the water passage port 341, the water is evenly distributed in the lengthwise direction of the pipe. Can be supplied.

As shown in FIGS. 10 and 11, in this embodiment, a frame 36 similar to the porous layer forming unit 44 is laid in the pipe unit layer 3, and the inside of the frame 36 is covered. Is filled with sand or gravel with good water permeability. Like the porous layer forming unit 44, the frame body 36 can be made of a material such as paperboard for corrugated board, a plastic material, a metal material, or the like. The frame 36 itself may or may not be water-permeable. further,
It is also possible to fill the pipe unit layer 3 with the same material as the porous layer forming material 45 of the porous layer 4.

Next, an embodiment of the invention of claim 14 will be described. In the above-described embodiment, the construction method in which the porous layer forming unit 44 is arranged and the porous layer forming material 45 is carried in and laid therein is adopted. Such a method is also one that can be adopted, but as a method of significantly shortening the time until the start of use of the ground, each of the box-shaped frame bodies 441 that configure the porous layer forming unit 44 There is a method to grow vegetation in advance.

That is, the above-mentioned porous layer forming unit 44
The porous layer forming material 45 is filled inside the frame body 441 constituting the above, and seeds are seeded near the surface of the filled porous layer forming material 45 to grow vegetation in advance. A large number of frame bodies 441, in which such vegetation has been grown in advance, are prepared, carried into a construction site, and arranged and lined up on the ground soil 1. However, if left as it is, the edge portion of the frame body 441 is exposed on the surface, and the vegetation is interrupted at the edge portion, so sprinkle sand etc. so as to cover the surface of the frame body 441 spread. The surface layer 46 is formed thin. If the construction is carried out in this way, the use of the ground can be started almost immediately after the construction is completed, and therefore the construction period of the entire sports ground can be shortened significantly.

The construction method having such a concept can be applied not only to the construction of the drainage system of the above-mentioned embodiment but also to construction of sports grounds requiring vegetation in general. That is, according to the construction method as described above, the construction of the vegetation portion of the sports ground is completed in only three steps of excavating the soil, spreading the box-shaped frame, and forming the surface layer,
The construction period can be shortened significantly. Furthermore, it goes without saying that the construction of vegetation includes not only the construction of a sports ground completely new, but also the replacement of existing vegetation (replacing the lawn, etc.).

As an example of using such a construction method other than the construction of the drainage system of the above-mentioned embodiment, the inside of the box-shaped frame is filled with ordinary soil, and the surface thereof is covered with necessary vegetation such as lawn. Grow and spread it on the ground soil. When the drainage environment of the ground soil is good, the desired result may be obtained even with such a configuration.

[0057]

As described above, according to the invention of claim 1 or 2 of the present application, since the porous layer is formed on the pipe unit layer, the water on the ground surface quickly becomes the pipe unit layer. Therefore, even if there is a large amount of precipitation, there will be no water pool on the ground surface and no mud on the ground surface. Further, according to the invention of claim 3, in addition to the effect of the invention of claim 2, since the fertilizer in the porous layer promotes the growth of vegetation, a better result can be obtained. Also,
According to the invention of claim 4, in addition to the effect of the invention of claim 1, 2 or 3, the flow of water is regulated in the vertical direction, so that the effect of improving drainage efficiency can be obtained. Further, according to the invention of claim 5, in addition to the effect of the invention of claim 4, since roots of vegetation can be captured in the pores, the rooting strength is increased and when vigorous exercise is performed on the ground surface. However, the effect of eliminating peeling of vegetation can be obtained. Further, according to the invention of claim 6, in addition to the effect of the invention of claim 4 or 5, since it has a nursery layer, it is possible to obtain an effect that it becomes a system suitable for growing vegetation from seeds. Further, according to the invention of claim 7,
In addition to the effect of the invention of 2, 3, 4, 5 or 6, it is possible to irrigate the vegetation on the ground surface, so that it can be suitably installed in a place where precipitation decreases with time. Further, according to the invention of claim 8, in addition to the effect of the invention of claim 7, since the drained water is recycled and reused, there is an effect of saving water. Further, according to the invention of claim 9, in addition to the effect of the invention of claim 7 or 8, it is possible to grow vegetation that needs to be grown under warm underground temperature conditions even in cold regions and winter. Become. According to the invention of claim 10, claims 1, 2, 3, 4, 5,
In addition to the effect of the invention of 6, 7, 8 or 9, the drainage performance is improved by the auxiliary drainage pipe in the porous layer, and it can be suitably installed even in a place where a large amount of rainwater is temporarily present. Further, according to the invention of claim 11 or 12, when constructing the drainage system of the construction of claim 4, 5 or 6, the porous layer forming unit assembled at another place is carried into the construction place and Since the construction is completed simply by filling the porous layer forming material with the material, the construction is easy and the construction period can be shortened. According to the invention of claim 13,
Since the pipe unit combining the drainage pipe and the irrigation pipe is completed only by the fitting operation of the pipes, the pipe unit is easy to assemble and the construction period is short. Further, according to the invention of claim 14, since it is not necessary to wait for a period in which vegetation grows after construction, the period from the completion of construction to the start of use can be shortened, and the construction period of the entire sports ground can be greatly shortened.

[Brief description of drawings]

FIG. 1 is a schematic cross-sectional view illustrating the structure of a drainage system for a sports ground according to a first embodiment of the present invention.

FIG. 2 is a schematic cross-sectional view illustrating a pipe unit in the drainage system shown in FIG.

FIG. 3 is a schematic perspective view of a frame body that constitutes a porous layer forming unit of the drainage system of FIG.

FIG. 4 is a schematic perspective view illustrating the configuration of a vertical slot portion in the porous layer forming unit of the drainage system of FIG.

FIG. 5 is a plan view illustrating an outline of an irrigation / drainage line when the drainage system shown in FIGS. 1 and 2 is adopted in a soccer field.

FIG. 6 is a schematic plan view for explaining an arrangement position of a porous layer forming unit.

FIG. 7 is a schematic cross-sectional view illustrating the structure of a second embodiment of the drainage system for sports grounds of the present invention.

FIG. 8 is a schematic cross-sectional view of the embodiment shown in FIG. 7 in another direction.

FIG. 9 is a schematic plan view when the drainage system shown in FIGS. 7 and 8 is adopted in a soccer field.

FIG. 10 is a schematic sectional view illustrating the structure of a third embodiment of the drainage system for sports grounds of the present invention.

11 is a schematic cross-sectional view of the embodiment shown in FIG. 10 in another direction.

[Explanation of symbols]

 1 Ground Soil 2 Waterproof Layer 3 Pipe Unit Layer 30 Pipe Unit 31 Drain Pipe 32 Watering Pipe 33 Heat Unit 4 Porous Layer 41 Water Retaining Layer 42 Rooting Layer 43 Seedling Layer 44 Porous Layer Forming Unit 441 Frame 442 Vertical Slot 445 Vertical slot 446 Pore 45 Porous layer forming material 46 Surface layer 47 Auxiliary drainage pipe

 ─────────────────────────────────────────────────── --Continued from the front page (54) [Title of Invention] Drainage system for sports ground, porous layer forming unit used for this system, pipe unit used for drainage system for sports ground, and construction method for sports ground Law

Claims (14)

[Claims] 1. A drainage system for a sports ground, which is constructed on a ground soil at a position dug to a predetermined depth from a ground surface on which natural vegetation such as lawn is applied, the waterproofing being for waterproofing the surface of the ground soil. Layer, a pipe unit having a drainage function disposed in the pipe unit layer located above the waterproof layer, and a non-soil porous layer located above the pipe unit layer and below the ground surface The drainage system for a sports ground, which is characterized in that the water that permeates from the ground surface is discharged to the outside by the pipe unit via the porous layer. 2. The drainage system for a sports ground according to claim 1, wherein the non-soil porous layer is formed by spreading a granular material having no compaction effect. 3. A drainage system for a sports ground according to claim 2, wherein the granular material is mixed with granular fertilizer. 4. The drainage system for a sports ground according to claim 1, wherein the porous layer has a vertical slot for vertically controlling the flow of water. 5. The drainage system for a sports ground according to claim 4, wherein the vertical slot is divided into pores having a size into which a root of vegetation on the ground surface can enter. 6. The porous layer is divided into a water retention layer, a rooting layer, and a nursery layer in order from the bottom, and the vertical slot is provided in the rooting layer portion. The drainage system for a sports ground according to claim 4 or 5. 7. The pipe unit has a drainage function as well as a watering function, and is configured to be able to supply water to the porous layer.
The drainage system for a sports ground according to 4, 5, or 6. 8. The pipe unit comprises a drainage pipe and an irrigation pipe, and is configured to recycle the water discharged from the drainage pipe to the irrigation pipe. Drainage system for sports grounds. 9. The drainage system for a sports ground according to claim 7, wherein the pipe unit includes a heat unit for heating supplied water. 10. An auxiliary drainage pipe is embedded in the porous layer.
The drainage system for a sports ground according to 4, 5, 6, 7, 8 or 9. 11. A porous layer forming unit for forming a porous layer having the structure according to claim 4, 5, or 6,
It is composed of a frame body where necessary parts are formed to have water permeability, and a vertical slot portion held by this frame body, assembled in advance at another place, transported to a sports ground, and constructed. A porous layer forming unit characterized by being present. 12. The paper according to claim 1, which is made of paper or plastic in which holes are formed where necessary.
1. The porous layer forming unit according to 1. 13. A pipe unit used in a drainage system for a sports ground, which is constructed on a ground soil at a position dug to a predetermined depth from a ground surface on which natural vegetation such as lawn is provided, wherein the drainage is In a pipe unit configured by combining a drainage pipe having an inflowing drainage port and communicating with an external drainage facility and an irrigation pipe having a water supply port for outflowing water supplied from a water supply line, one pipe has a recessed portion. A pipe unit having the other pipe, the outer diameter of which is adapted to the recess, and the other pipe is assembled by fitting the other pipe into the one pipe. 14. A method of constructing a sports ground where natural vegetation such as lawn is applied, wherein a growth material is previously provided inside a box-shaped frame body having water permeability and an upper surface having an opening. Filling and growing the vegetation on the surface of the filled growing material in advance, bring in a large number of frames in this state to the place to be constructed and lay them side by side on the ground soil, and then on the surface layer of the specified thickness A construction method for a sports ground characterized by covering.