JPH08228617A - Water feeding and draining apparatus for turf field - Google Patents

Abstract

PURPOSE: To provide a water-feeding and draining apparatus having suppressed initial cost and running cost as a turf bed structure and a water-feeding and draining apparatus and effective for reducing the amount of water, keeping the feeding water from the influence of the temperature of outer atmosphere and promoting the reaction of the control of water content under the turf bed without placing obstacles in the turf field. CONSTITUTION: This water-feeding and draining apparatus for a turf field planted with turf 1 has a water-feeding pipe 5 having water-feeding holes 6 on the circumference and embedded in the ground of the turf field to a depth deeper than the root of the turf 1. A waterproofing sheet layer 4 is placed below the water-feeding pipe 5 and a draining pipe 9 is embedded in the ground almost along the waterproofing sheet layer 4. The circumference of the water- feeding pipe 5 is wound with a water permeable material such as nonwoven cloth 7 to allow the flow-out of water from the water-feeding holes 6 and inhibit the flow-in of sand into the holes 6.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water supply / drainage device for a turf field such as a soccer field in which turf grass is planted.

[0002]

2. Description of the Related Art In a turf field such as a soccer field in which turf grass is planted, water is sprayed on the turf grass manually or by a sprinkler. In particular, since the turf field is wide, sprinklers are often provided, that is, a large number of sprinklers are installed in the turf field and a water supply pipe is laid under the turf field.

The conventional lawn floor structure is mainly composed of sand, and its drainage structure includes a natural drainage structure, a regulated drainage (water level adjustment) structure, and a forced drainage structure. As a construction method, there are a general method (USGA method and California method) by underdrain drainage (natural drainage) by a watering method, a PAT method of adjustment / forced drainage, and a cell system method of adjustment / forced drainage.

First, in the USGA method, which is a general method of underdrain drainage (natural drainage) with a sprinkling system, a gravel layer and a coarse sand layer for increasing water retention capacity are provided on a drain pipe, and grass grass is planted on the sand layer. It is a thing. In the same way, the improved version of the California system is that all layers above the drainage pipe are made of the same sand to plant turfgrass, and the entire floor structure is surrounded by an impermeable sheet to concentrate drainage in one place. It is the one. In addition to the same structure as the California method (improved type), the PAT method is basically capable of connecting a suction pump to the drain pipe for forced drainage and also for underground water supply. It is what Further, the cell system method is basically the same as the PAT method, in which one field is divided into fine parts (cells) surrounded by a water impermeable sheet to forcibly perform water supply / drainage control. is there.

Next, typical examples of the conventional lawn floor structure and water supply / drainage structure will be described with reference to the drawings. First, FIG. 3 shows a lawn floor structure and a drainage structure of a general method (underdrain drainage) by a sprinkling method. 31 is a surface layer, 32 is a middle layer, 33 is a lower roadbed, 34 is an underdrain, and 35 is a drain pipe. That is, the turf bed structure of this general method (underdrain drainage) has a three-layer structure consisting of a surface layer 31 made of sand or black soil, a middle layer 32 made of sand or volcanic gravel, and a lower layer roadbed 33 made of crushed stone. An underdrain 34 is provided in the inside, and single-grain crushed stones are packed in the underdrain 34 and passed through a drain pipe 35. In the case of such a general type (underdrain drainage) lawn floor structure and drainage structure, sprinkled water and rainwater are drained from the drainage pipe 35 in the underdrain 34. Is quick to dry.

FIG. 4 shows a grass floor structure and a water supply / drainage structure of a conventional cell system (water level adjusting method).
1 is a surface layer, 42 is a lower layer, 43 is a water impermeable sheet, 44 is a water supply pipe, 45 is a drain pipe, and 46 is a water level adjusting valve. That is,
The turf floor structure of this cell system (water level adjusting method) is a cell in which a lower layer 42 made of sand is surrounded by a water impermeable sheet 43 as well as a surface layer 41 made of sand, and is not shown in the lower layer 42 of this cell. Water supply pipe 44 connected to the water tank
Also, the drain pipe 45 is arranged vertically. In addition,
The drainage pipe 45 is connected to a water tank via a water level adjusting valve 46 outside the cell. The turf floor structure and the water supply / drainage structure of such a cell system (water level adjusting method) are, for example, shown in each cell by dividing the soccer field 1 surface into 12 equal cells and using a water level adjusting valve 46 outside the cell. In this way, the water level is controlled near the upper part of the lower layer 42,
The drainage is a natural flow due to the gradient, and the water supply uses circulating water pumped up from the water storage tank.

FIG. 5 shows a turf floor structure and a water supply / drainage structure of a conventional PAT system (forced water supply / drainage system), where 51 is a surface layer, 52 is a lower layer, 53 is a water impermeable sheet, 5
Reference numeral 4 is a water supply / drainage pipe (perforated pipe), and 55 is a water tank / vacuum pump. That is, the turf floor structure of this PAT system (forced water supply / drainage system) has a surface layer 51 made of sand as well as a lower layer 5 made of sand.
2 is surrounded by a water impermeable sheet 53 to form a cell. A water supply / drainage pipe 54 having a perforated pipe is arranged in the lower layer 52 of the cell, and the water supply / drainage pipe 54 is used as a water storage tank / vacuum pump 55. It is connected. As described above, in the case of the PAT system (forced water supply / drainage system), the water supply / drainage pipe 54 network with perforated pipes in the turf bed is connected to the water tank / vacuum pump 55, and the vacuum pump removes excess water in the turf bed. It is a system that performs forced drainage or forced water supply (pressure feed) when drying. It is also possible to install a moisture sensor in the turf bed and automatically operate the system.

[0008]

However, in the case of the conventional turf field sprinkling system, as can be seen from FIG. 3, although the initial cost is low, the manual sprinkling method by man is troublesome and requires a skilled person. There was a problem that was. In the case of a sprinkler, the water discharge hole is located in the turf field, which has a drawback that it hinders the competition.

The cell system (see FIG. 4) has the following problems. Since the groundwater of the turf bed is always stored under the turf bed,
It is easily affected by the outside temperature, especially when it is midsummer.
The water temperature rises, which adversely affects the grass. On the contrary, in winter, the ground temperature is lowered, which adversely affects the growth of turfgrass. Even if the water blocking layer is provided, it is impossible to completely suppress the water leakage, which leads to an increase in the water supply amount. Since water is always stored under the turf bed, the water content tends to be excessive, which may cause root rot of the grass.

Further, in the case of the PAT system (see FIG. 5), since forced drainage and forced water supply (feed water pressure feed) by the vacuum pump are performed, the control management thereof becomes complicated and the running cost becomes high. there were.

Therefore, an object of the present invention is, in a turf field in which turf grass is planted, there is no obstacle in the turf field, both the initial cost and the running cost are kept low, the amount of water used is reduced, and the supply water is reduced. Another object of the present invention is to provide a water supply / drainage device that is less likely to be affected by the outside air temperature and that has a faster reaction for adjusting the water content in the lower part of the grass floor.

[0012]

In order to solve the above-mentioned problems, the invention according to claim 1 is a water supply / drainage device for a turf field in which turf grass is planted, wherein the root of the turf grass is located in the formation of the turf field. The water supply pipe having a water supply hole in the periphery, which is buried deeply, a waterproof sheet layer provided deeper than the water supply pipe, and a drain pipe embedded substantially along the waterproof sheet layer are featured. .

The invention according to claim 2 is based on claim 1.
In the water supply / drainage device for a turf field described above, a configuration in which the periphery of the water supply pipe is wound with a permeable material such as a nonwoven fabric that allows outflow of water from the water supply hole and prevents sand from flowing into the water supply hole. It has a feature.

The invention according to claim 3 is the water supply and drainage device for a turf field according to claim 1 or 2.
The waterproof sheet layer is characterized by having a water gradient that guides water from the water supply pipe side to the drain pipe side.

[0015]

According to the first aspect of the present invention, a water supply pipe having a water supply hole in the periphery is buried deeper than the root of the grass in the formation of the turf field, and a waterproof sheet layer is provided deeper than the water supply pipe. Since it is a water supply and drainage device that has a drainage pipe buried almost along this waterproof sheet layer, there is no sprinkling member in the turf field, so it does not hinder the competition.
Moreover, the initial cost and running cost are lower than those of the forced water supply / drainage system. Further, since the water leakage is eliminated by the existence of the waterproof sheet layer, the amount of water used is reduced. Further, the water supplied from the water supply hole of the water supply pipe is drained from the drainage pipe embedded along the waterproof sheet layer deeper than the water supply pipe and is not always stored, so the supply water is Less likely to be affected.

According to the second aspect of the invention, the periphery of the water supply pipe is wound with a permeable material such as a non-woven fabric which allows water to flow out from the water supply hole and prevents sand from flowing into the water supply hole. Therefore, the water supplied from the water supply hole of the water supply pipe permeates the permeable material such as the non-woven fabric wound around the water supply pipe before being supplied to the surrounding sand layer. Therefore, the water is effectively supplied to the lower part of the turf bed, and the reaction of adjusting the water content in the lower part of the turf bed is accelerated.

According to the third aspect of the invention, since the waterproof sheet layer has a water gradient for guiding water from the water supply pipe side to the drain pipe side, drainage can be smoothly performed.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of a water supply / drainage device for a turf field according to the present invention will be described below with reference to FIGS. 1 and 2. First, FIG. 1 shows a floor structure for a turf field and a water supply / drainage device as an example to which the present invention is applied.
1 is turfgrass, 2 is upper layer, 3 is lower layer, 4 is waterproof sheet layer, 5
Is a water supply pipe, 6 is a water supply hole, 7 is a permeable material, 8 is an underdrain, 9
Is a drainage pipe.

That is, in this embodiment, as shown in the drawing, the surface layer 2 on which the turfgrass 1 is planted on the entire surface of the turf field.
Is a layer of coarse sand with a depth of about 200 mm, and the lower layer 3 thereunder is a layer of river sand with a depth of about 200 mm, and the lower surface of the layer is a substantially horizontal surface using a waterproof sheet made of vinyl chloride, for example. A waterproof sheet layer 4 is provided. And about 3 up to the root of turfgrass, especially its water root
The water supply pipe 5 is buried and piped at a position deeper than about 100 mm, that is, at a substantially middle portion in the vertical direction of the lower layer 2 made of the river sand. The water supply pipe 5 is made of, for example, vinyl chloride, is connected to a water tank and a water supply pump (not shown), and is surrounded by a suitable number of water supply holes 6, 6, 6 ,. There is. The water supply pipes 5 are arranged at intervals of about 2 m, for example.

Further, the water supply pipe 5 allows outflow of water from the water supply hole 6 to the periphery having a large number of water supply holes 6, 6, 6, ... The non-woven fabric 7 which is a permeable material for preventing the inflow of the is wound. This non-woven fabric 7 is wrapped around the entire length of the water supply pipe 5,
It is fixed by an appropriate method such as adhesion. A culvert 8 is formed on the lower surface of the lower layer 2 made of the river sand. In addition,
The underdrain 8 is arranged at intervals of, for example, about 10 to 15 m. And inside the underdrain 8, for example,
Single grain crushed stones are packed and passed through the drainage pipe 9. The drain pipe 9 is connected to the water storage tank. The waterproof sheet layer 4 is provided so as to also surround the underdrain 8 as shown in the drawing.

As described above, according to the present invention, the water supply pipe 5 is buried in a portion deeper than the root of the turfgrass 1 (about 300 mm to the water root), and the pipe is arranged at intervals of about 2 m. Water is supplied from the appropriate number of water supply holes 6, 6, 6, ... Moreover, with respect to the water supply holes 6, 6, 6, ..., The water supply pipe 5 is wound with the nonwoven fabric 7 to prevent the backflow of sand. In addition, by installing the drainage pipe 9 deeper than the water supply pipe 5, a natural flow-down system is adopted. Then, by attaching a vinyl chloride waterproof sheet to the lower surface of the lawn floor, water that had been naturally permeated to the deep part in the past is collected in the drain pipe 9 in the underdrain 8 and collected in the water storage tank for reuse. To save water resources.

As described above, according to the water supply / drainage device for a turf field of the present invention, the root of the turfgrass 1 (about 30 up to the moisture root) can be obtained.
0mm) deeper than the water supply holes 6,
The water supply pipe 5 having 6, 6, ...
Since the waterproof sheet layer 4 is provided at a deeper portion and the drain pipe 9 is passed through the underdrain 8 provided along the waterproof sheet layer 4, the following effects can be obtained.

Since there is no water sprinkling member such as a conventional sprinkler in the turf field, there is no fear of hindering the competition. Compared with the conventional PAT system such as the forced water supply / drainage system, the facility configuration and control are simpler, so that both the initial cost and the running cost are lower. Since the water leakage is eliminated by the presence of the waterproof sheet layer 4, the amount of water used is reduced and water resources can be saved. The water supplied from the water supply hole 6 of the water supply pipe 5 is drained from the drainage pipe 9 in the underdrain 8 provided along the deep waterproof sheet layer 4, that is, like the conventional cell system. Since the water is not always stored, the supplied water is less likely to be affected by the outside temperature. The water supplied from the water supply hole 6 of the water supply pipe 5 permeates the non-woven fabric 7 wound around the water supply pipe 5, and then is supplied to the lower layer 3 by the surrounding river sand, so that the water is supplied to the lower part of the turf bed. Is effectively performed, and the reaction of adjusting the water content in the lower part of the turf bed becomes faster.

Next, a floor structure for a turf field according to the second embodiment of the present invention shown in FIG. 2 will be described. That is, in the second embodiment, as shown in FIG. 2, the lower layer 3 made of river sand and the waterproof sheet layer 4 on the lower surface thereof are located below the water supply pipe 5 (including the non-woven fabric 7 wound around it). It has a structure having water gradients 10, 10 where the part is high and decreases toward the underdrains 8, 8 on both sides thereof. Since the other structures are the same as those in the first embodiment, the same parts as those in the first embodiment are designated by the same reference numerals and the description thereof is omitted.

Since the lower layer 3 and the waterproof sheet layer 4 on the lower surface of the second embodiment are constructed as described above, in addition to the effects obtained by the construction of the first embodiment, The effect of writing is obtained. From the side of the water supply pipe 5 in the lower layer 3 to the drainage pipe 9 in the underdrain 8,
Water gradient with a downflow that guides water to the 9 side respectively,
Since there is 10, drainage is performed smoothly.

In the above embodiments, the lawn floor structure has a two-layer structure of coarse sand and river sand, but the present invention is not limited to this, and a lawn floor structure having an appropriate structure can be used. Good. Further, the material of the waterproof sheet layer, the material of the permeable material wound around the water supply pipe, and the like are arbitrary, and it is needless to say that the specific detailed structure and the like can be appropriately changed.

[0027]

As described above, according to the water supply / drainage device for a turf field according to the invention described in claim 1, the water supply pipe having the water supply hole is buried in the formation of the turf field deeper than the root of the turf grass. However, since a waterproof sheet layer is provided deeper than the water supply pipe and the drain pipe is buried almost along the waterproof sheet layer, there is no sprinkler member in the turf field, so there is no hindrance to the competition. Moreover, both the initial cost and the running cost can be reduced as compared with the forced water supply / drainage type. Further, since the water leakage is eliminated by the presence of the waterproof sheet layer, the amount of water used can be reduced, and therefore water resources can be saved. Further, the water supplied from the water supply hole of the water supply pipe is drained from the drain pipe buried along the waterproof sheet layer deeper than the water supply pipe, that is, it is not always stored, so There is also an advantage that it is less likely to be affected by the outside temperature.

According to the water supply / drainage device for a turf field according to the second aspect of the present invention, a permeable material such as a non-woven fabric which allows the outflow of water from the water supply hole and prevents the inflow of sand into the water supply hole. By wrapping around the water pipe,
The water supplied from the water supply hole of the water supply pipe penetrates into the permeable material such as the non-woven fabric wound around the water supply pipe before it is supplied to the surrounding sand layer, so it is effective to supply water to the lower part of the turf bed. Therefore, it is possible to obtain the advantage that the reaction of adjusting the water content in the lower part of the turf bed becomes faster.

According to the turf field water supply / drainage device of the third aspect of the present invention, since the waterproof sheet layer is provided with the water gradient for guiding the water from the water supply pipe side to the drain pipe side, the water can be smoothly drained. it can.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional side view showing a floor structure and a water supply / drainage device for a turf field as an example to which the present invention is applied.

FIG. 2 is a vertical sectional side view similar to FIG. 1, showing a floor structure for a turf field according to a second embodiment of the present invention.

FIG. 3 is a vertical cross-sectional side view showing a turf floor structure and a drainage structure of a general method (underdrain drainage) by a conventional watering method.

FIG. 4 is a vertical cross-sectional side view showing a grass floor structure and a water supply / drainage structure of a conventional cell system (water level adjusting method).

FIG. 5 is a vertical sectional side view showing a turf floor structure and a water supply / drainage structure of a conventional PAT system (forced water supply / drainage system).

[Explanation of symbols]

 1 Turfgrass 2 Upper layer 3 Lower layer 4 Waterproof sheet layer 5 Water supply pipe 6 Water supply hole 7 Permeable material 8 Underdrain 9 Drain pipe 10 Water gradient

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Hiroshi Minami 2-10-26 Fujimi, Chiyoda-ku, Tokyo Maeda Construction Co., Ltd. (72) Hiroyuki Oku 2-42-33 Ogikubo, Suginami-ku, Tokyo

Claims (3)

[Claims] 1. A water supply / drainage device for a turf field in which turf grass is planted, the water supply pipe having a water supply hole in the periphery, which is buried deeper than the root of the turf grass in the formation of the turf field, and the water supply pipe. A water supply / drainage device for a turf field, comprising: a waterproof sheet layer provided in a deep portion; and a drain pipe buried substantially along the waterproof sheet layer. 2. The periphery of the water supply pipe is wound with a permeable material such as a non-woven fabric which allows water to flow out from the water supply hole and prevents sand from flowing into the water supply hole. Item 1. A water supply / drainage device for a turf field according to item 1. 3. The water supply / drainage device for a turf field according to claim 1, wherein the waterproof sheet layer has a water gradient that guides water from the water supply pipe side to the drain pipe side.