JP4997482B2 - Artificial grass ground construction method - Google Patents

Description

  The present invention relates to a method for constructing an artificial turf ground, and more specifically, it has excellent drainage, can protect a roadbed and a roadbed, and can be applied to a ground with a lot of spring water. It is about the method.

  In recent years, artificial turf ground has rapidly spread due to advantages such as low running costs and use without being influenced by the weather, such as baseball fields, soccer fields, rugby fields, American football fields, and hockey fields. It was. Artificial turf used for such a purpose is a cushioning property in which synthetic resin turf leaves are planted on a thermoplastic resin base fabric and a backing layer is formed by a synthetic resin material cross-linked to the back side of the base fabric. In order to enhance the structure, the rubber top and sand are filled between the grass leaves.

  For example, the artificial lawn ground with sand described in Patent Document 1 is laminated on the base layer made of natural ground in the order of a roadbed layer, an elastic buffer layer made of an elastic buffer lower layer and an elastic buffer upper layer, and an artificial lawn in this order. Furthermore, it is formed by spraying sand on the grass of an artificial lawn. Here, in a cold region where the base layer is soft or a frost heaving phenomenon may occur, a crusher run having a particle size of 15 mm or less is laid as a roadbed layer. Further, the elastic buffer layer is made by spreading and kneading rubber particles and foam rubber particles having a particle diameter of 1 to 5 mm, dry stone particles or rubber chips having a particle diameter of 1 to 10 mm, and weather-resistant moisture-curing urethane. It is formed by curing.

  In addition, the artificial lawn containing particulate matter described in Patent Document 2 is filled with a particulate matter in the gap between piles planted on the base material on the foundation base made of asphalt, concrete, asphalt concrete, mortar, crushed stone roadbed, etc. The pile length is in the range of 30 to 60 mm when the pile is upright, and the average upright length of the pile protruding from the surface of the filled granular material is 30 to 70% of the pile length. And the hard granular material which consists of an inorganic type granular material or an organic type granular material is distributed on the said base material, a lower layer hard granular material is formed, and the rubber chip elastic granular material is mainly distributed on it, and the upper layer elastic granular material was formed. It is configured.

  In these conventional artificial turf grounds, rainwater is passed through the base sheet of the permeable artificial turf to permeate the ground elastic layer from the base elastic layer to the roadbed layer and the roadbed. Due to excessive penetration of water into the lower layer, the roadbed may become soft and shape deformation may occur. The deformation of the lower layer leads to unevenness of the artificial turf, and the repair work becomes large. On the other hand, the situation becomes even more serious when an artificial turf ground is constructed on the ground where spring water tends to occur.

  Patent Document 3 discloses a structure in which a drainage is improved by providing a culvert in the lower layer of the artificial turf round. This Patent Document 3 relates to a technique for renovating an existing surface drainage type all-weather ground or all-weather type water-permeable ground to a water-permeable artificial turf ground. A plurality of strip-shaped culverts with a predetermined distance from the bottom of the roadbed surface are formed on a pavement made by laminating asphalt concrete layers, urethane elastic layers, etc., and permeable asphalt concrete or crushed stone in the culverts In the structure of the athletic field pavement surface that is configured to be substantially the same as the existing pavement surface, the permeable asphalt concrete is filled in the underdrain, or a layer such as a rubber chip is formed on the surface of the permeable asphalt concrete layer. A structure is described in which it is formed so as to be substantially flush with the existing pavement surface, and a water-permeable artificial turf with sand is disposed on the surface of the layer. Furthermore, a main culvert having a depth reaching the roadbed is formed so as to cross the branch culvert, a permeable tube is laid in the lower portion thereof, crushed stone is backfilled, and permeable asphalt concrete is filled thereon.

  The structure of a conventional general water-permeable artificial turf ground is a structure in which rainwater permeates from the artificial turf through the roadbed to the roadbed. In this case, a culvert may be provided in the lower layer to enhance drainage. Such a conventional artificial turf ground construction method is to first excavate a culvert pipe embedding path on the roadbed from which the existing roadbed or the existing subbase layer has been scraped, and to put a single grain crushed stone and culvert pipe on the culvert pipeway. Laying, then crusher run with a thickness of 80-200mm to form a roadbed, sand or screenings on it to a thickness of 1-5mm, leveling unevenness of the roadbed, if desired An open-graded asphalt concrete is paved with a thickness of 40 to 70 mm to form an upper layer roadbed, and finally an artificial turf layer is paved thereon.

However, with the structure or construction method of conventional permeable artificial turf ground, rainwater permeates the roadbed and the roadbed becomes soft, especially when it continues to rain, and becomes softer. When using, there is a risk that the roadbed will be deformed and the roadbed will be eroded. As described above, when the shape change occurs due to consolidation settlement or sediment discharge in the lower layer, it directly affects the flatness of the surface layer. However, repairing the lower layer after laying the artificial turf is extremely difficult and is a major construction. In addition, when a permeable artificial turf ground is constructed on the ground with a lot of spring water, in addition to the above-mentioned problems, the spring water wets the artificial turf through the roadbed and overflows onto the artificial turf. This may cause a puddle.
JP 07-247508 A JP 2003-171908 A JP-A-08-020907

  Therefore, in order to solve the above-described problems, the present invention is excellent in drainage, and maintains the artificial turf pavement stably by protecting the roadbed and roadbed from softening due to the intrusion of rainwater, and has a lot of spring water. An object of the present invention is to provide an artificial turf ground construction method capable of preventing excessive wetting of artificial turf pavement by spring water even when applied to the ground.

In order to achieve the above-mentioned object, the present invention forms a non-permeable layer on the surface of the ground, and a ground leveling process for leveling and rolling the ground of the existing road bed or the ground surface of the existing road bed. A water impermeable process for the roadbed, a drainage layer forming process in which a crusher run is laid on the impervious layer to a thickness of 80 to 200 mm and rolled, and the surface of the drainage layer is not prime-coated and the drainage layer laying the drainage asphalt layer forming step of applying asphalt concrete pavement open-graded, the permeability of artificial turf on top of drainage asphalt layer permeability thick 30~70mm more than 10 -2 ^{cm /} sec over the An artificial turf pavement process and an artificial turf construction method characterized by comprising:

  In this case, in the drainage layer forming step, it is more preferable that a plate-shaped underdrain pipe is disposed on the impermeable layer, and then a crusher run is laid and rolled. Here, the plate-like underdrain pipe may be called a planar drain or a planar drainage material.

  Here, the impervious layer is formed by spraying a highly permeable cationic asphalt emulsion on the surface of the ground, formed by impervious asphalt pavement, or formed by laying a vinyl chloride sheet. It is preferable that As the highly permeable cationic asphalt emulsion, a trade name “Penecoat E” manufactured by Nichireki Co., Ltd. or an equivalent thereof is used.

It is more preferable that the water-impermeable layer is formed by spraying 1 to 15 L / m ² of a highly permeable cationic asphalt emulsion on the surface of the ground.

Further, the artificial turf is obtained by vegetating turf leaves on a water-permeable base sheet, and a rubber chip is paved to a thickness of 10 to 20 mm on the drainable ascon layer to form an underpad layer, After laying the artificial turf base sheet on it, the rubber turf and the particle size-adjusted sand are filled between the turf leaves while raising the turf, and the impact absorption rate of the artificial turf is 60% to 80%. To do.

  Furthermore, the artificial turf has lawn leaves arranged in the width direction of the base sheet, and the lawn leaves are arranged at equal intervals in the longitudinal direction of the base sheet. It is more preferable that the long pile artificial turf has a protrusion length of 1.5 to 5 times the interval between the turf leaf rows.

  According to the construction method of the artificial turf ground of the present invention, the shape change of the lower layer after the artificial turf construction having the following effects directly affects the flatness of the surface layer. When changes occur, the lower layer needs to be repaired, but in general, the lower layer repair is extremely separate and is a major construction. The present invention forms a water-impermeable layer on the surface of the ground and blocks the penetration of rainwater from the upper layer to the ground, so that the distortion of the lower layer (consolidation settlement and sediment runoff) due to water does not occur after artificial turf construction. Can be. Even when an artificial turf ground is constructed on the ground with a lot of spring water, the impermeable layer can block the spring water and eliminate the influence on the upper layer. For example, the water that springs up from the lower layer of the roadbed can reduce the infiltration of soil into the upper artificial turf layer and solidify the layer occupied by sand and rubber.

The impervious layer is formed by spreading a highly permeable cationic asphalt emulsion (Penecoat E) on the surface of the ground, but can also be formed by laying impervious asphalt pavement or vinyl chloride sheet. It is. The method of spraying 1-15 L / m ^{2 of} highly penetrating cationic asphalt emulsion on the ground is easy in construction, shortening the construction period and reducing costs, and deeply penetrates the ground, so the modified layer is thick And the ground becomes more stable.

  Moreover, since this invention is a mechanism which permeate | transmits a drainage layer through artificial turf and a drainable ascon layer, and drains the water collected on the impermeable layer with a plate-shaped underdrain pipe, drainage capacity is very high. Moreover, because the drainage layer made of crusher run is sandwiched between an impervious layer and a high-strength, open-graded drainage ascon layer, the top layer has excellent shape stability, and unevenness of the upper layer due to aging occurs. Can be reduced.

  And since the drainage layer which consists of an open-gradient drainage ascon layer and a crusher run also fulfills a moisture retention function in addition to the drainage function, it can maintain a moderate wetness as an artificial turf ground for a long period of time.

  Next, the present invention will be described in more detail based on the embodiments shown in the accompanying drawings. FIG. 1 shows a cross section of an artificial turf ground constructed by an artificial turf ground construction method according to the present invention. In the figure, reference numeral 1 is the ground, 2 is an impermeable layer, 3 is a drainage layer, 4 is a plate-shaped underdrain pipe, 5 Indicates a drainable ascon layer, 6 indicates an underpad layer, and 7 indicates an artificial grass.

The present invention relates to a ground leveling process in which the unevenness of the existing roadbed or the ground surface of the existing roadbed 1 is trimmed and rolled, and a roadbed that forms an impermeable layer 2 on the surface of the ground 1. A water impermeability step, a drainage layer 3 forming step of laying and crushing the crusher run 8 to a thickness of 80 to 200 mm on the water impermeable layer 2, and a water permeability coefficient of 30 to 70 mm on the drainage layer 3 Consists of a drainable ascone layer 5 forming step for applying asphalt concrete pavement with an open particle size of 10 ⁻² cm / sec or more, and an artificial turf pavement step for laying artificial grass 7 on the drainable ascone layer 5.

  Each step will be described in more detail. First, in the ground leveling process, the existing roadbed or the existing roadbed surface is scraped as shown in FIG. 2 (a), and the ground is refilled or filled, and then the ground as shown in FIG. 2 (b). This is a process of correcting the unevenness of 1 and compacting it with the rolling roller 9 so that the finished surface is not easily scoured by rainwater.

Next, the impermeable process of the road bed is a process of forming the water-impermeable layer 2 on the surface of the ground 1. In order to form the water-impermeable layer 2, as shown in FIG. A highly permeable cationic asphalt emulsion 10 is sprayed on the surface of 1 to form a curing. Here, in the present embodiment, the highly permeable cationic asphalt emulsion 10 uses a product name “Penecoat E” manufactured by Nichireki Co., Ltd., and sprays an amount of 1 to 1.5 L / m ² by a spraying machine or manually. Here, instead of penecoat E, impervious asphalt pavement or a vinyl chloride sheet may be laid to form the impermeable layer 2, but penecoat E penetrates deeply into the ground 1 and stabilizes. This is preferable because the thickened layer is formed thick.

  Penecoat E is a highly penetrating cationic asphalt emulsion for prime coats, which penetrates deeply into the roadbed to improve water resistance and stability, hardens in a short time after spraying, and has almost no adhesion to tires. The next process can be performed, and the construction efficiency can be increased. Furthermore, there is no odor or danger, and it can be handled as easily and safely as ordinary emulsions. In addition, it is preferable to spread the sand after spraying the penecoat E because the sand does not attach to the tire of the heavy machinery such as a truck when the upper layer is applied, and the peeling can be suppressed.

  Then, after the impermeable layer 2 is cured, the drainage layer 3 forming step shown in FIGS. 3 (a) and 3 (b) is performed. For this purpose, first, the plate-like culvert tube 4 is arranged on the water-impermeable layer 2 at a predetermined interval (see FIG. 3A), and then the crusher run 8 is laid to a thickness of 80 to 200 mm to form a plate-shaped culvert tube. 4 is pressed so that no partial pressure is applied (see FIG. 3B). The upstream side of the plate-like underdrain pipe 4 is treated so that no earth and sand flows in, and when the flow end is not connected, it is always kept in a good state and is connected to the permeable pipe in the trench. Depending on the required drainage performance, the plate-shaped culvert tube 4 may not be provided, but it is usually desirable to provide the plate-shaped culvert tube 4.

  In the present embodiment, a trade name “Guri Sheet” of Takiron Co., Ltd. is used as the plate-like underdrain tube 4. This grease sheet has a structure in which a high-density polyethylene sheet is molded into a special shape having a high porosity to form a core material, and the core material is covered with a nonwoven fabric filter made of polypropylene. In addition, it is possible to use a planar drain or a planar drainage material having the same performance as a grease sheet.

The drainage ascon layer 5 forming step is a step of applying an asphalt concrete pavement with an open grain size having a thickness of 30 to 70 mm and a water permeability of 10 ⁻² cm / sec or more on the drain layer 3 (FIG. 3C). reference). Here, the asphalt concrete has a standard asphalt amount of 4.0 to 6.0%, and the asphalt is a petroleum asphalt for paving and has a penetration of 60 to 80. And the drainable ascon layer 5 paved in this way has a porosity of 15 to 20% and a hydraulic conductivity of 10 ⁻² cm / sec or more. Here, it should be noted that the prime coat is not applied to the surface of the drainage layer 3 composed of the crusher run 8, thereby allowing rainwater to smoothly penetrate from the drainable ascon layer 5 into the drainage layer 3. It becomes.

  Finally, the artificial turf pavement step is a step of laying the artificial turf 7 on the drainable ascon layer 5. In this embodiment, long pile artificial grass with rubber chips is used for use in intense sports such as soccer, rugby, and American football that fall over or slide. Such an artificial turf 7 is obtained by vegetating turf leaves 12,... 65 mm in length on a water-permeable base sheet 11. Specifically, the turf leaves 12,. The lawn leaves are arranged at equal intervals in the longitudinal direction of the base sheet 11, and the protruding length of the lawn leaves 12 from the base sheet 11 is 1.5. It is set to double to 5 times. In this embodiment, Sekisui Resin Co., Ltd. trade name “Dream Turf PT2065” was used.

  And as shown in FIG. 4, after spreading | curing a primer uniformly on the surface of the said drainable ascon layer 5 and curing, what mixed the rubber chip and the urethane binder by the predetermined | prescribed mixing | blending on it into the thickness of 10-20 mm The underpad layer 6 is formed by paving. Then, as shown in FIG. 4, after the base sheet 11 of the artificial turf 7 is laid on the underpad layer 6, the rubber chips and the rubber chips are placed between the turf leaves 12 while raising the turf leaves 12,. The filler 14 mixed with particle size adjusted sand is filled to a thickness of 40 mm ± 3 mm. Here, it is preferable to construct the artificial turf 7 so that the impact absorption rate is 60% to 80%. When the artificial turf 7 has sufficient shock absorption, or depending on the purpose of use of the artificial turf ground, the underpad layer 6 may be omitted.

  If the top coat is evenly spread on the underpad layer 6 without laying the artificial turf 7 as in the present invention, and the top coat is on the surface layer, a track such as a track for land is constructed. it can.

It is sectional drawing of the artificial turf ground constructed by this invention. It is sectional drawing which shows a part of construction method of this invention, (a) shows the ground after unevenness correction, (b) shows the leveling process of the ground which compacted the ground with a rolling roller, (C) has each shown the process of forming an impermeable layer on the surface of the ground. It is sectional drawing which shows a part of construction method of this invention, (a) shows the process of laying a plate-shaped underdrain pipe on an impermeable layer, (b) lays a crusher run and forms a drainage layer Step (c) shows a step of forming a drainable ascon layer on the drainage layer. It is sectional drawing which showed the paving process of the artificial grass.

Explanation of symbols

1 ground,
2 water-impermeable layer,
3 Drainage layer,
4 Plate-shaped underpass,
5 Drainable ascon layer,
6 Underpad layer,
7 Artificial grass,
8 Crusher run,
9 Rolling roller,
10 High permeability cationic asphalt emulsion,
11 substrate sheet,
12 Shiba
13 Rotating brush,
14 Filler.

Claims (6)

A ground leveling process in which the unevenness of the existing roadbed or the ground surface of the existing roadbed is leveled and the ground is leveled and rolled;
A water impermeable process for the road bed to form an impermeable layer on the surface of the ground;
A drainage layer forming step in which a crusher run is laid on an impermeable layer to a thickness of 80 to 200 mm and rolled;
A drainable ascon layer forming step of applying an asphalt concrete pavement having an open particle size of 30 to 70 mm in thickness and having a water permeability of 10 ⁻² cm / sec or more without applying a prime coat to the surface of the drainage layer;
Artificial turf pavement process of laying permeable artificial turf on drainage ascon layer,
An artificial turf ground construction method characterized by comprising:   The method for constructing an artificial turf ground according to claim 1, wherein, in the drainage layer forming step, a crusher run is laid and rolled after disposing a plate-like underdrain pipe on the impermeable layer.   The impermeable layer is formed by spreading a highly permeable cationic asphalt emulsion on the surface of the ground, formed by impermeable asphalt pavement, or formed by laying a vinyl chloride sheet. Item 3. An artificial grass ground construction method according to Item 1 or 2. The artificial grass ground construction method according to claim 1 or 2, wherein the water-impermeable layer is formed by spraying 1 to 1.5 L / m ² of a highly permeable cationic asphalt emulsion on the surface of the ground. The artificial turf is obtained by vegetating turf leaves on a water-permeable base sheet, and a rubber chip is paved to a thickness of 10 to 20 mm on the drainable ascon layer to form an underpad layer thereon. After the artificial turf base material sheet is laid, the rubber turf and the particle size-adjusted sand are filled between the turf leaves while raising the turf, and the impact absorption rate of the artificial turf is 60% to 80%. The construction method of the artificial turf ground in any one of claim | item 1-4.   The artificial turf has lawn leaves arranged in the width direction of the base sheet, and the lawn leaves are arranged at equal intervals in the longitudinal direction of the base sheet, and the lawn leaves protrude from the base sheet. 6. The method for constructing an artificial turf ground according to claim 5, wherein the artificial turf ground is a long pile artificial turf whose length is set to 1.5 to 5 times the interval between the turf leaves.

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