JP2890181B2 - Lawn ground floor soil structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a floor of a sports ground, such as a green field of a golf course, a fairway, various stadiums, a tennis field, and a baseball field, such as a sports ground in which stock-type cold grass is planted. Regarding the structure.

[0002]

2. Description of the Related Art Conventionally, in a floor soil structure of this kind of lawn ground, a culvert drainage channel is provided on a subgrade, and a crushed stone layer is provided on the subgrade including the culvert drainage channel, and a lower drainage layer is provided. The vertical and horizontal dimensions are 7-8 x 1 on the lower drainage layer.
0 to 15 cm, and about 1.0 cm, a floor soil layer mixed with a plastic net piece for reinforcement is provided,
The lawn was planted on this floor soil layer.

[0003]

[SUMMARY OF THE INVENTION However, bed soil structure of such a conventional lawn ground, or sand soil soil is employed consisting basically by mixing the sand and Masa soil in the bed soil layer, For example, a structure in which sand having different particle sizes are roughened downward and finer upward is laid in multiple layers.
Further, although plastic net pieces are mixed for reinforcement, this plastic net piece is, as described above,
The pieces are only individually independent, and have little function of intertwining with each other for continuity. Further, in general, the above-mentioned cold-season lawn lacks the integrity of the lawn because the root connectivity is weak and the lateral connectivity is poor.

Therefore, even if this cold lawn is used for the above-mentioned conventional lawn ground floor soil structure, light external factors, such as spikes of various sports shoes and golf club heads. At present, a divot or the like is easily formed by receiving an external force such as being lifted up or exterminated by the like, and there is a problem that is not practical.
Further, the conventional ground obtained by斯Ru approach, only different sand sandy soil soil and particle size is employed as a bed soil, bed soil is easily pushed hardened by trampling and mechanical running of competitor ( This causes problems in cushioning properties, air permeability, and water permeability in the near future, which leaves much room for improvement.

[0005] The present inventors have, as described above a result of various studies of the problems of the bed soil structure of a conventional lawn ground, first, the case of employing only sand or sand soil soil in bed soil, said as Focusing on the fact that there is a problem that it is easy to consolidate, and that there is a problem that the mixing of small piece nets cannot secure the lateral continuity of the lawn, it is difficult to consolidate easily, and As a result of intensive research to obtain a floor soil structure that can easily ensure continuity, the present invention has been developed. Therefore,
An object of the present invention is to provide a floor-soil structure for a lawn ground that can easily ensure the continuity of lawn roots and that cannot be easily compacted by athlete's treading or machine running, especially stock-type cold regions. It is an object of the present invention to provide a floor ground structure of a lawn ground which is very suitable for adopting a natural lawn.

[0006]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a floor soil layer in which the root of a lawn is easily entangled with the soil, and which can elastically absorb tread pressure and mechanical pressure. The material which makes it difficult for the soil of the lever floor layer to be consolidated is mixed. At the same time, in order to further supplement the function of this material, a material having continuity over a wide range is decided to be laid under the floor soil layer, where the prosperous roots are easily entangled.
By entanglement of the roots between the two materials, the lawn is not easily pulled out by an external force, and the floor soil layer is appropriately cracked, and the cushioning property can be improved. .

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION According to the present invention, a culvert drainage channel is provided on a subgrade, a crushed stone layer is provided on the subgrade including the culvert drainage channel, and a lower drainage layer is provided. in bed soil structure lawn ground grass vegetation soil layer is provided on the layer, the vegetation soil layer, sand soil soil this sand
5-10% volume ratio to soil soil, diameter length in 1~3mm
Formed in a size and shape with a length of 2 to 7 cm that are easily entangled with each other
Consists of a bed soil layer soil dressing is compacted is laid in a predetermined thickness formed by the rubber chips which are mixed is a net continuous laid under the bed soil layer, further wherein A lawn is planted on the floor soil layer.

The present invention has the most important meaning because the structure of the combination of the above-mentioned soil, particularly the rubber chip having connectivity and the continuous net laid thereunder is devised.

Therefore, the rubber tip having connectivity has the following features.
Specifically, for example, fibrous materials contained in waste rubber materials such as used rubber tires or belts of a belt conveyor are removed and crushed. However, there is a device in its size, and it is not finely crushed, for example, 3-5 mm. Instead of making fine particles, the diameter is 1-3 mm and the length is set in the range of 2-7 cm. In other words, it is important to have a "length" as it is called "hijiki-like rubber".

The soil is laid on the continuous net with a thickness of, for example, 10 cm and is compacted. The soil dressing is a volume ratio to the sand soil soil and sand soil soil 5-10%, preferably 7%, said
It is called "hijiki-like rubber" and has a "length"
And rubber chip and is formed by mixing. In addition, in addition to the rubber chips having connectivity, an inorganic material such as Nenisanso (trade name), an organic material such as peat moss, and a soil aggregating agent such as polyethylene oxide are mixed into the soil as required. .

The continuous net is a conventional 7-8 × 10
Unlike a plastic net piece that is 15 cm square and has a size of about 1.0 cm, which is merely independent and has no function of intertwining itself and having continuity, It is a continuous plastic net with a combined thickness of 2 to 3 mm. As the material, chemical fibers such as nylon, polyethylene, and polypropylene are usually employed.

[0012] The underdrain canal has a width of, for example, 40 m.
A digging is provided in the shape of a rib at about 50 cm and a depth of about 30 to 40 cm. In this groove, the central drainage groove is, for example, φ100 to 150 mm, and the other drainage grooves are φ80 to 150 mm. A drain pipe of 100 mm is laid, and around it, for example, a grindstone of No. 7 crushed stone is laid. Therefore, it is sufficient for the underdrainage ditch to have a structure generally used conventionally.

The crushed stone layer includes the culvert drainage ditches, and is composed of a crushed stone of No. 7 crushed stone having a thickness of, for example, about 5 cm on the subgrade.

In order to further promote the growth of the lawn and to further enhance the resistance against treading, a configuration in which a mixed soil layer is laid between the lower drainage layer and the continuous net can be adopted. The mixed soil layer is obtained, for example, by mixing sand and silt having a volume ratio of 5 to 10% with respect to the sand, and is laid on the crushed stone layer with a thickness of, for example, 15 cm. Become.

When a cold-season lawn is planted on the floor layer of the floor ground structure of the lawn ground constructed as described above, the roots that have proliferated from each plant are first mixed into this floor layer. Is called "hijiki-like rubber".
It is entangled with the rubber chips that have the "a", and works to improve the integration between the root and the soil. In addition, roots of a plurality of strains become entangled with each other via one rubber chip, and work to improve lateral continuity of the roots.

Further, the continuous net laid under the floor soil layer further entangles the root which has prospered downward in the floor soil layer, thereby further improving the lateral continuity of the root through the continuous net. Work to improve further.

[0017] The being mixed into the bed soil layer
It is called "hijiki-like rubber" and has a "length"
The rubber tip has a conventional structure , that is, for example, 3 to 5 mm.
Unlike fine-grained ones , it works to absorb the athlete's treading pressure and the mechanical pressure caused by the machine running well, and at the same time, works to generate appropriate cracks in the floor soil layer.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A preferred example in which the present invention is applied to a soccer ground structure will be described below with reference to the drawings. FIG. 1 is a cross-sectional view showing the floor soil structure of a lawn ground according to the present invention, which will be described in order from the lowest layer. A culvert drain 2 with a depth of 30 is excavated.
In this culvert drain 2, the main drain is φ150
mm, and a drain pipe of φ90 mm
Are laid, and around these drain pipes 3 crushed stone 4 of No. 7 is packed.

On the subgrade 1 including the culvert drain 2, grindstone 5 of No. 7 crushed stone having a thickness of 5 cm is laid to form a crushed stone layer 6, and the culvert drain 2 and this crushed stone are formed. The lower drainage layer 7 is formed by the layer 6.

Further, on the crushed stone layer 6, a soil layer 8 for vegetation is provided.
Is provided. First, immediately above the crushed stone layer 6, a mixed soil layer 9 obtained by mixing sand and silt having a volume ratio of 5 to 10% with respect to the sand is laid with a thickness of 15 cm.

On this mixed soil layer 9, a continuous net 10 made of polyethylene woven with a mesh size of 2 cm is laid over the entire surface.

Furthermore, on of the continuous net 10, with a rubber chip 11 having a volume ratio of 7% connectivity to the sandy soil soil and sandy soil <br/> soil is mixed, needs Depending on,
A soil 12 mixed with an inorganic material such as Nenisanso (trade name), an organic material such as peat moss, and a soil aggregating agent such as polyethylene oxide is laid at a thickness of 10 cm, and is compacted by compaction. Has been created.

Further, the rubber chip 11 having the connectivity
Was obtained by removing the fibrous material contained in a used rubber tire and crushing it to a size having a diameter of 1 to 3 mm and a length of 2 to 7 cm. However, fine particles having a size of, for example, 3 to 5 mm were appropriately selected and excluded, and chips having a "length" referred to as "hijiki-like rubber" that conformed to the above predetermined size range were adopted.

A cold grass lawn 14 is planted on the floor soil layer 13.

The grass ground constructed as above is
When the roots of the grassy lawn 14 of the strain type prosper, first, the roots that have proliferated for each plant are entangled with the connected rubber chip 11 mixed in the floor soil layer 13. This entanglement improves the integrity of the root and the soil 12, and at the same time, the roots of a plurality of plants become entangled with each other via one rubber chip 11, so that lateral continuity of the root is obtained.

Further, the more prosperous roots are
Is also entangled with the continuous net 10 laid underneath, through which the horizontal continuity of the root can be obtained.

Further, the rubber tip 11 having connectivity has not only the above-mentioned function but also repeatedly contracts and restores by treading pressure and mechanical pressure. As a result, the floor soil layer 13 is liable to crack, and exert the action of remarkably to prevention of caking of the layer 13, only sand soil soil or sand is laid, unlike easily soil compacting is such a conventional structure, cushioning, breathable even better water permeability As a result, the treading resistance was also increased.

Since the mixed soil layer 9 can further promote the growth of lawn roots and further improve the resistance against treading, the use of the mixed soil layer 9 makes it more ideal for a lawn ground. Floor soil structure is obtained.

However, although not shown, a continuous net 10 is laid directly on the lower drainage layer 7 if necessary.
Even if the structure in which the floor soil layer 13 is laid on the continuous net 10 is adopted, satisfactory results capable of sufficiently achieving the intended purpose were obtained.

[0030]

As described above, the present invention can be applied to a floor soil layer.
It is called "hijiki-like rubber" and has a "length"
The roots that prosper from each plant by mixing the rubber chips are called this "hijiki-like rubber".
In addition, the rubber chips with the "length" are entangled with each other, which can greatly improve the integrity of the root and the soil, and the roots of multiple plants are entangled with each other via one rubber chip, Continuity can be significantly improved, so it is easy to divot even if it is subjected to light external factors such as spikes in various sports shoes, golf club heads, etc. Is not formed, and a good ground environment can be obtained for many months.

Further, by laying a continuous net under the floor soil layer, roots that have grown further down the floor soil layer are entangled with the continuous net, and the roots are laid next to the root through the continuous net. Continuity can be further improved, so that the occurrence of the above-mentioned divot and the like can be more effectively prevented, and a better ground environment can be obtained for many months.

[0032] The present invention, unlike the conventional structure where only different bed soil is sandy soil soil and particle size sand have been laid bed soil is compacted easily, this "hijiki this bed soil layer
In other words, the rubber chip having a "length" is mixed with the rubber layer, so that the floor soil layer is easily cracked and hardly consolidated. In addition to securing the lateral continuity, the cushioning property, the air permeability, and the water permeability can be favorably maintained.

[0033] Therefore, the root of the lawn elongates well, the growth is good, the disease resistance, the cold resistance and the pest resistance are remarkably improved, and the stepping resistance is also increased.

Further, by providing a mixed soil layer between the lower drainage tank and the continuous net, it is possible to further promote the growth of the lawn roots and to further improve the resistance against treading. Thus, a more ideal lawn ground floor soil structure can be obtained.

[Brief description of the drawings]

FIG. 1 is an explanatory perspective view showing an embodiment of a floor soil structure of a lawn ground according to the present invention, including an enlarged view of a main part in which a part is taken out and enlarged.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... subgrade, 2 ... culvert drainage channel, 6 ... crushed stone layer, 7 ... lower drainage layer, 8 ... vegetation soil layer, 9 ... mixed soil layer, 10 ... continuous net, 11 ... connectable rubber chip, 12 ... customer Sat, 13
… Floor layer, 14… lawn.

Claims (4)

(57) [Claims] A culvert drainage channel is provided on a subgrade, a crushed stone layer is provided on the subgrade including the culvert drainage channel, a lower drainage layer is provided, and a grass drainage layer is provided on the lower drainage layer. In the floor soil structure of a lawn ground provided with a vegetation soil layer, the vegetation soil layer has a volume ratio of 5 to 10% , a diameter of 1 to 3 mm and a length of 2 to 2 % with respect to the sandy loam and the sandy loam. 7cm
A bed soil layer formed by mixing a rubber chip having a predetermined thickness with a rubber chip mixed with a rubber chip having a size and a shape easily entangled with each other; And a continuous net laid under the floor, and further comprising a lawn planted on the floor soil layer. 2. The method of claim 1, wherein the net, bed soil structure of the lawn ground of claim 1 Symbol placement eye if it is 1~3cm. 3. The vegetation soil layer includes a mixed soil layer provided on the lower drainage layer, wherein the continuous net is provided on the mixed soil layer, and the floor soil layer is provided on the continuous net. The floor soil structure of a lawn ground according to any one of claims 1 and 2 , further comprising: 4. The floor soil structure of a lawn ground according to claim 3 , wherein the mixed soil layer is obtained by mixing sand and silt having a volume ratio of 5 to 10% with respect to the sand.