JP4001587B2 - Artificial grass laying structure - Google Patents

Description

  The present invention relates to an artificial turf laying structure suitable for creating a stadium such as a soccer ground and a rooftop green space.

  As shown in FIG. 3, the conventional artificial turf laying structure 30 is formed of a roadbed layer 31 formed on the ground 34, and an artificial turf 33 and a mesh sand layer 42 arranged on the roadbed layer 31. The roadbed layer 31 is formed of a kneaded material such as crusher run, open grained asphalt, porous concrete, and the like sand layer 42 is formed of silica sand or a mixture of silica sand and rubber chips.

  In the conventional artificial turf laying structure 30, although the drainage function of the roadbed layer 31 and the mesh sand layer 42 is excellent, there is no water retention function like a natural lawn, so the moisture supplied to the artificial turf 33 part by rain or watering etc. As shown by the vertical downward arrows in FIG. 3, it passes through the mesh sand layer 42 and the roadbed layer 31 in a short time and is rapidly sucked into the ground 34. For this reason, in the area where the artificial turf laying structure 30 is constructed, a temperature rise due to sunshine in the summertime is severe, which may promote the so-called heat island phenomenon.

Then, in order to solve such a situation, the artificial turf laying structure which has a water retention function is developed (for example, refer patent document 1, 2). These artificial turf laying structures are equipped with water retention means in the lower layer area than artificial turf, and the phenomenon that moisture evaporating from the water retention means via artificial turf deprives the heat of vaporization at high temperatures such as summer. It is used to avoid temperature rise.
Japanese Patent Application Laid-Open No. 07-127011 JP 2003-129408 A

  In the case of the artificial turf laying structure (artificial planting laying structure) described in Patent Document 1, since the concrete layer is arranged at the bottom, labor and materials for placing concrete during construction is required. In addition, the soil layer disposed directly under the artificial turf sheet is likely to become muddy during rainfall, which may cause unevenness. Furthermore, since about 1 year after construction, the soil layer deteriorates its water permeability and it becomes difficult to absorb water, so the water retention function may be lost.

  On the other hand, since the artificial turf laying structure (moisture retention type artificial turf) described in Patent Document 2 has a complicated structure, it requires a great deal of labor and materials during construction, and lacks practicality. .

  The problem to be solved by the present invention is to provide an artificial turf laying structure having a function of suppressing a temperature rise and having excellent drainage, water retention and durability.

The artificial turf laying structure of the present invention lays an artificial turf formed by planting an artificial turf material on a water-permeable sheet material on a roadbed layer formed on a foundation ground, and the artificial turf material is An artificial turf laying structure formed by forming a mesh sand layer on the sheet material in an exposed state,
The mesh sand layer is formed of an improved soil composed of a soil material, a cement-based solidifying agent or lime, and a soil improver containing a polymer compound,
The roadbed layer is formed of an improved roadbed material including the improved soil, foamed glass material, and artificial granulated sand having an average particle size of about 2 mm ,
The artificial granulated sand is formed by kneading fly ash having a particle diameter of 10 μm or less, cement, water, and heavy metal elution inhibitor in coal incineration ash and undergoing a granulation step .

Hereafter, fly ash in coal incineration ash (particle size of 10 μm or less), cement, water, and heavy metal elution inhibitor are kneaded, and artificial granulated sand with an average particle size of about 2 mm formed through the granulation process is manufactured by FS It says grain sand.

  By adopting such a structure, the mesh sand layer formed of the improved soil composed of a soil material, a cement-based solidifying agent, and a soil improving material containing a polymer compound has water absorption and water retention, and improved soil. Since the roadbed layer formed of the improved roadbed material including the foamed glass material and the FS granulated sand also has water absorption and water retention, overall water absorption and water retention are improved. Therefore, moisture that has poured onto the artificial turf due to rain or water spray is quickly sucked into the mesh sand layer, and moisture that cannot be absorbed by the mesh sand layer passes through the artificial turf sheet material and is sucked into the roadbed layer. It is stored inside and in the roadbed layer. When the temperature in the vicinity of the artificial turf rises due to sunlight, the water retained in the mesh sand layer and the roadbed layer evaporates from the surface of the mesh sand layer to the atmosphere, at which time the heat of vaporization is deprived. The rise can be suppressed.

  In addition, the roadbed layer containing foamed glass material has excellent water absorption, so the drainage of the artificial turf part is good, and by containing the foamed glass material, the compressive strength is high. Since it does not become muddy and the water absorption does not deteriorate after construction, unevenness does not occur and durability is excellent. The particle size of the foam glass is preferably about 5 mm to 40 mm, and the mixing amount is preferably about 20% to 60% of the volume of the improved soil. Furthermore, FS granulated sand exhibits a function of increasing the water retention amount of the roadbed layer.

Further, the artificial turf laying structure of the present invention lays an artificial turf formed by planting an artificial turf material on a water-permeable sheet material on a roadbed layer formed on a foundation ground, and the artificial turf An artificial turf laying structure formed by forming a mesh sand layer on a sheet material with the material exposed,
The mesh sand layer is formed of an improved soil composed of a soil material, a cement-based solidifying agent, and a soil improver containing a polymer compound,
The roadbed layer is formed of an upper layer containing improved soil and a lower layer containing FS granulated sand.

  With such a configuration, for the same reason as the above-mentioned artificial turf laying structure, it has a function of suppressing a temperature rise, and is excellent in drainage and durability. Since the roadbed layer is formed with the lower layer containing the FS granulated sand, the water retention amount of the roadbed layer is increased, so that the function of suppressing the temperature rise is maintained for a relatively long time even when clear weather continues.

  Here, the polymer compound is preferably composed of a composite of a magnesium salt of acrylic acid / dimethylaminoethyl methacrylate copolymer and polyethyleneimine. By using such a polymer compound, aggregated structures of soil particles are formed in the mesh sand layer and the roadbed layer, thereby improving water permeability and water retention and preventing turbid water from flowing out in rainy weather. can do.

  The present invention has the following effects.

(1) An artificial turf formed by planting artificial turf material on a water-permeable sheet material is laid on the roadbed layer formed on the foundation ground, and the artificial turf material is exposed and the sheet material is exposed. In the artificial turf laying structure in which a mesh sand layer is formed, the mesh sand layer is formed of a modified soil composed of a soil material, a cement-based solidifying agent or lime, and a soil improving material containing a polymer compound, and a roadbed layer Is formed with an improved roadbed material containing improved soil, foamed glass material, and FS granulated sand, thereby obtaining an artificial grass laying structure having a function of suppressing a temperature rise and having excellent drainage and durability. be able to.

(2) An artificial turf formed by planting artificial turf material on a water-permeable sheet material is laid on the roadbed layer formed on the foundation ground, and the artificial turf material is exposed and the sheet material is exposed. In the artificial turf laying structure formed by forming a mesh sand layer on top, the mesh sand layer is formed with improved soil consisting of a soil material, a cement-based solidifying agent, and a soil conditioner containing a polymer compound, and the roadbed layer is Since the water retention is further increased by forming the upper layer containing the improved soil and the lower layer containing the FS granulated sand, in addition to the effect (1), the function of suppressing the temperature rise can be maintained for a long period of time. It becomes possible.

(3) By using a polymer compound composed of a magnesium salt of acrylic acid / dimethylaminoethyl methacrylate copolymer and polyethyleneimine as the polymer compound, a group of soil particles is formed in the mesh sand layer and the roadbed layer. Since the grain structure is formed, water permeability and water retention are improved, and turbid water can be prevented from flowing out during rainy weather.

  Hereinafter, an artificial turf laying structure according to an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a vertical sectional view showing an artificial grass laying structure according to a first embodiment of the present invention.

  As shown in FIG. 1, the artificial turf laying structure 1 of this embodiment is an artificial turf formed by planting an artificial turf material 5a on a sheet material 5b on a roadbed layer 3 formed on a foundation ground 2. The grass 5 is laid and the mesh sand layer 4 is formed on the sheet material 5b with the artificial grass material 5a exposed. In the artificial turf 5, a large number of artificial turf materials 5a are planted on a sheet material 5b formed of rubber or a synthetic resin, and the portions corresponding to the space between adjacent artificial turf materials 5a of the sheet material 5b are water permeable, respectively. A through-hole 5c is provided. The mesh sand layer 4 is formed of an improved soil composed of a soil material, a cement-based solidifying agent, and a soil improving material containing a polymer compound. The roadbed layer 3 is formed of an improved roadbed material including improved soil, foamed glass material, and FS granulated sand.

  The composition of the improved soil constituting the mesh sand layer 4 is not particularly limited and can be changed according to the construction conditions. However, the cement solidifying agent 20 kg to 80 kg and the polymer compound 2 liters per 1 cubic meter of soil material. An addition amount of about 4 liters is preferred.

  Further, the composition of the improved roadbed material constituting the roadbed layer 3 is not particularly limited and can be changed according to the construction conditions. In this embodiment, the foamed glass material 400 kg to 1200 kg with respect to 1 cubic meter of the improved soil. The addition amount of about 300 kg to 500 kg of FS granulated sand is suitable.

  By having such a configuration, the joint sand layer 4 formed of the improved soil composed of a soil material, a cement-based solidifying agent, and a soil improving material containing a polymer compound has water absorption and water retention, and is improved. The roadbed layer 3 formed of an improved roadbed material including soil, foamed glass material, and FS granulated sand also has water absorption and water retention.

  Therefore, the water poured onto the artificial turf 5 due to rain or water spray is quickly absorbed by the mesh sand layer 4 and stored therein, and the moisture that cannot be stored in the mesh sand layer 4 passes through the through holes 5c of the sheet material 5b. Passes through and flows into the roadbed layer 3 and is stored therein. For this reason, the drainage of the artificial turf 5 is good, and the artificial turf laying structure 1 as a whole can store a relatively large amount of water.

  When the temperature of the artificial turf 5 increases due to a rise in temperature during sunny days or due to sunshine, the moisture retained in the mesh sand layer 4 and the roadbed layer 3 moves to the surface side and eventually into the atmosphere from the surface of the mesh sand layer 4. It will evaporate. Therefore, the temperature rise of the artificial turf 5 part and its surroundings can be suppressed by the heat of vaporization taken away during the evaporation of moisture.

  In addition, since the roadbed layer 3 includes the foamed glass material, not only water absorption and water retention but also compressive strength is improved, so that it does not occur due to mud during rainfall, unlike the conventional soil layer. Moreover, since water absorption does not deteriorate after construction, durability is also excellent. In the present embodiment, a foamed glass material having a particle size of about 5 mm to 40 mm and FS granulated sand having a particle size of 5 mm or less are used.

  Next, with reference to FIG. 2, the artificial turf laying structure 20 which is 2nd Embodiment of this invention is demonstrated. The artificial turf laying structure 20 lays the artificial turf 5 formed by planting the artificial turf material 5a on the water-permeable sheet material 5b on the roadbed layer 23 formed on the foundation ground 2. The mesh sand layer 4 is formed on the sheet material 5b with the artificial turf material 5a exposed. The artificial turf 5 is the same as that shown in FIG. The mesh sand layer 4 is the same as the mesh sand layer 1 constituting the artificial turf laying structure 1 of the first embodiment shown in FIG. 1, but the roadbed layer 23 includes an upper layer 23a containing improved soil and a lower layer containing FS granulated sand. 23b and the point formed.

  By adopting such a configuration, like the artificial turf laying structure 1 of the first embodiment, the artificial turf laying structure 20 has good drainage of the artificial turf 5 portion, and includes the mesh sand layer 4 and the roadbed layer 23. Due to the water absorption and water retention, it has a function of suppressing the temperature rise. In particular, in the case of the artificial turf laying structure 20, since the water retention is increased by forming the roadbed layer 23 with the upper layer 23a containing the improved soil and the lower layer 23b containing the FS granulated sand, even when clear weather continues, The function of suppressing the temperature rise lasts for a relatively long time.

  The polymer compound added to the improved soil when forming the mesh sand layer 4 and the roadbed layers 3 and 23 is a composite of a magnesium salt of acrylic acid / dimethylaminoethyl methacrylate copolymer and polyethyleneimine. Although the thing is suitable, in the artificial turf laying structures 1 and 20 of the first and second embodiments, GB-2000 (trade name) of Global Laboratories Ltd. is used.

  By using such a polymer compound, a aggregate structure formed of soil particles is formed in the mesh sand layer 4 and the roadbed layers 3 and 23. Therefore, not only exhibits excellent water permeability and water retention, It is possible to prevent muddy water from flowing out during rainy weather.

  The artificial turf laying structure of the present invention can be widely used for construction of a stadium such as a soccer ground and a rooftop green space.

It is a vertical sectional view showing the artificial grass laying structure which is the first embodiment of the present invention. It is a vertical sectional view showing an artificial grass laying structure which is a second embodiment of the present invention. It is a vertical sectional view showing a conventional artificial grass laying structure.

Explanation of symbols

1,20 Artificial turf laying structure 2 Ground 3,23 Roadbed layer 4 Eye sand layer 5 Artificial turf 5a Artificial turf material 5b Sheet material 5c Through hole 23a Upper layer 23b Lower layer

Claims (3)

An artificial turf formed by planting artificial turf material on a water-permeable sheet material is laid on the roadbed layer formed on the foundation ground, and the artificial turf material is exposed on the sheet material. An artificial turf laying structure formed by forming a mesh sand layer,
The mesh sand layer is formed of an improved soil composed of a soil material, a cement-based solidifying agent or lime, and a soil improver containing a polymer compound,
The roadbed layer is formed of an improved roadbed material including the improved soil, foamed glass material, and artificial granulated sand having an average particle size of about 2 mm ,
The artificial granulated sand is formed by kneading fly ash having a particle diameter of 10 μm or less, cement, water, and heavy metal dissolution inhibitor in coal incineration ash, and is formed through a granulation step. Laying structure. An artificial turf formed by planting artificial turf material on a water-permeable sheet material is laid on the roadbed layer formed on the foundation ground, and the artificial turf material is exposed on the sheet material. An artificial turf laying structure formed by forming a mesh sand layer,
The mesh sand layer is formed of an improved soil composed of a soil material, a cement-based solidifying agent or lime, and a soil improver containing a polymer compound,
The roadbed layer is formed of an upper layer containing the improved soil and a lower layer containing artificial granulated sand having an average particle size of about 2 mm ,
The artificial granulated sand is formed by kneading fly ash having a particle diameter of 10 μm or less, cement, water, and heavy metal dissolution inhibitor in coal incineration ash, and is formed through a granulation step. Laying structure.   The artificial turf laying structure according to claim 1 or 2, wherein the polymer compound is composed of a composite of a magnesium salt of acrylic acid / dimethylaminoethyl methacrylate copolymer and polyethyleneimine.

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