JP2015001116A - Construction method of lawn - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a construction method of lawn, without raising the surface temperature of the lawn even by the sunlight of midsummer, without fear of washing away even a seed and grass of a growth period even by heavy rainfall and a Typhoon, without damaging the lawn even when stamping the seed when a person enters, without requiring a special sheet and ab artificial member for growing natural lawn.SOLUTION: Artificial lawn 3 is laid on concrete and gravel 1, and the natural lawn 4 is grown on this. The artificial lawn 3 may simultaneously use the artificial lawn and a rubber chip, or may be already laid artificial lawn, or may also be at least one of Perennial, Perennial Ryegrass, Sun Devil II and Tiffton.

Description

  The present invention relates to a lawn construction method using artificial turf for a natural turf nursery.

  When constructing a lawn with natural turf, the conventional method is to prepare the floor soil, sow the seeds of turf grass and cover it with a non-permeable sheet such as a vinyl sheet until the seedlings settle. In other words, during the period from germination until the necessary young leaves grow, people are not allowed to enter and step on the seeds, or are protected from heavy rain, strong wind, dryness, etc.

  By simply covering the sheet as described above, if there is heavy rain, wind, etc. before the lawn settles, the topsoil may disappear and the seeds or seedlings in the growing season may disappear together. A turfgrass breeding sheet has also been developed that combines and integrates a seed layer having a support sheet through which roots from the seed can penetrate and a water-impermeable covering sheet provided with a vent hole. (Patent Document 1).

  In addition, there are golf courses, playgrounds, parks, gardens, factory roadsides, various site spaces, etc. as open spaces where grass and other plants are nurtured. Was normal. This is because the growth of the lawn is inhibited by the person entering the lawn or the stepping pressure of a car or the like.

  Furthermore, let the whole root invade into a thin layer of compost composed of a lawn protection board (Patent Document 2) for protecting a plant from a stepping pressure of a person entering a lawn or a car, etc., and crushed bark, Vegetation carpet with supporting structure itself (Patent Document 3), or a porous sheet on the nursery, put soil on it, sow the lawn seeds, grow the lawn and the root of the lawn is the hole in the sheet A lawn growing method (Patent Document 4), which is formed into a tangled mat shape, an artificial member having a specific shape attached to the mat, a loose filling member for maintaining it vertically, and a mixed turf comprising natural grass (Patent Document 5) has also been proposed

JP 2005-118027 A Japanese Patent Laid-Open No. 4-75541 JP-A-53-75035 Japanese Unexamined Patent Publication No. 7-31283 Special table 2013-509512 gazette

  Based on the above prior art, lawn protection and growth needs to be considered in consideration of various conditions including maintenance work such as soil improvement, fertilization, and mowing, as well as protection from lawn pressure on the lawn.

On the other hand, although artificial turf does not have the above-mentioned problems, in general, replacement with new artificial turf is required every 10 years, and the following problems are highlighted.
Artificial turf consists of a base fabric and piles shaped like the turf attached to the base fabric, and these are usually made of thermoplastic synthetic resin, so that the construction site (eg school, kindergarten, nursery school) In the garden, various grounds, etc., when the temperature rises to about 35 ° C during the summer day, not only the pile but also the base fabric absorbs and accumulates heat, and the surface temperature rises to about 70 ° C, and it is hot. There are fears of illness and burns due to contact with artificial turf components.

In natural turf, even if the temperature in midsummer rises to about 35 ° C., the surface temperature rises to about 45 ° C. at most, and the above-mentioned problems in midsummer on artificial turf do not occur.
However, natural turf has the following problems in addition to the above protection and maintenance.
(A) Generally, natural turf is cultivated about 15 cm from the surface of the soil where it is laid (sunlight, drainage, and well-ventilated place), and sand is laid to create a well-drained ground. In addition to the above protection and maintenance, it is necessary to cure for a certain period of time (for example, prohibiting access by non-workers, etc.) Costly work.
(B) Depending on the type of natural turf (Japanese turf and Western turf, summer turf and winter turf depending on the growth temperature), suitable growth (summer turf grows in summer and withers in winter, winter turf in winter It is necessary to carefully select the type of grass to be laid depending on the construction site.
(C) Due to the above (b), it becomes a green turf in either summer or winter, but becomes dead in other seasons.
(D) In order to improve the above (c), an overseed method is also known in which both summer and winter turf are planted. However, as long as it is a natural turf, the above problems (a) and (b) It remains as it is.

  As mentioned above, artificial turf and natural turf differ in construction method, maintenance management method, construction purpose, construction cost, etc., so it is generally possible to select either natural turf or artificial turf. It is customary and still has problems with artificial and natural turf.

  The present invention is based on the above situation, and does not require a special sheet for natural turf cultivation, or an artificial member having a special shape, and even if a person enters and steps on a seed, the lawn is rarely damaged, In addition, there is no possibility that seeds and growing turfgrass will disappear together with heavy rain, wind, etc., and the disadvantage that the surface temperature of the lawn rises even when exposed to the midsummer sunlight on the artificial turf is extremely effective. It is an object to provide a lawn construction method that can be supplemented.

As a result of repeated studies to solve the above-mentioned problems, the present inventor has compared artificial turf and natural turf that had to be constructed separately because of various differences in construction methods and the like as described above. Surprisingly, as a result of unifying and constructing, contrary to the common general knowledge, not only can the above problems be solved, but the following knowledge is also obtained.
(A) Since artificial grass can be used as it is, it is not necessary to prepare a special artificial member as in Patent Document 5.
(A) Since a general-purpose product can be used, an artificial turf already laid can be used as an artificial turf in the construction method of the present invention.
(C) The artificial turf is used as a natural turf nursery. By doing so, it is possible to omit excavation and other operations necessary for making natural turf floor soil.

The lawn construction method of the present invention is based on the above knowledge,
(1) An artificial turf is laid on at least one of concrete, asphalt, gravel, and soil, and natural turf is grown thereon.
At this time, (2) the artificial turf may be used in combination with rubber chips, (3) may be an existing artificial turf, or (4) the natural turf is perennial, perennial ryegrass, or sandy bil It may be at least one of II and Tifton.
The construction site suitable for the method of the present invention may be any place that is outdoors, such as a school yard, various grounds, a kindergarten or a nursery school, as long as it is sunny, well-drained, and well ventilated. It may be a place where an artificial turf is already laid.

According to the enforcement method of the present invention, it is possible to construct a lawn utilizing the characteristics of artificial turf and natural turf. Specifically, the following effects can be obtained.
(1) In addition to moderately hindering the growth of natural turf because lawn is stepped on by humans, in the present invention coexisting with artificial turf, the absolute amount of natural turf is reduced and the necessary pruning is A frequency of about a fraction of that of natural turf alone is sufficient.
(2) With natural turf alone, the roots are crushed and the turf dies when stepped on. However, in the present invention, the natural turf root crushed by being stepped on with feet is suppressed by the elasticity of the artificial turf. It will not wither.
(3) When the outside air temperature rises to about 35 ° C. in summer, the surface temperature rises to about 70 ° C. with artificial grass alone, but can be suppressed to about 50 ° C. or less with the lawn of the present invention.
(4) In the case of natural turf, syringing (watering from above the turf) is indispensable, but the underground irrigation system (giving water and fertilizer directly to the roots of the natural turf from the pipes in the ground) System) can be used not only to promote a decrease in temperature but also to reduce the amount of water used.
(5) Moreover, if rainwater is used in the ground irrigation system of (4) above, natural rain → artificial turf (+ rubber chips) → asphalt, gravel, etc., filter the rainwater into beautiful water for circulation Is done.
(5) Although natural turf is easily damaged by various factors (spike dragging, etc.), the load of the damage factor can be reduced by artificial grass (+ rubber chip) having high elasticity.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 schematically shows an example of the present invention, and is a schematic cross-sectional view of a state in which grass is soiled on the surface of an artificial grass. FIG. 2 is a schematic cross-sectional view of a state where seeds of natural turf are planted on the lawn soil of FIG. 1 to germinate and grow.

For example, as shown in FIG. 1, the artificial turf may be a general-purpose one composed of a base cloth (base cloth) 3A and a turf thread (pile) 3B attached thereto.
The pile 3B may be a general-purpose so-called long pile having a length as long as about 5 to 6 cm. If the pile 3B is a long pile, the life of the artificial turf can be extended, and maintenance and management become easy.

In the present invention, the artificial turf 3 having the above-described configuration is laid on concrete, asphalt, gravel, and earth (in this example, the asphalt 2 is constructed on the crushed stone layer 1 and the asphalt 2). As concrete and asphalt, open grained (porous) concrete and open grained asphalt (mixture) having water permeability are suitable.
Along with these asphalt and gravel, although not shown, a base cloth or an underpad may be used, or a drain pipe or the like may be embedded in asphalt or gravel.

In the present invention, the artificial turf 3 may be used in combination with a rubber chip. The mode of combined use is not particularly limited, but the lower surface of the artificial turf 3, that is, between asphalt or gravel 2 and the base fabric 3A of the artificial turf 3, or between the piles 3B, 3B. .., etc. (in this example, piles 3B, 3B... Are used by interposing rubber chips 4, 4,...), And any mode may be used. Since it is used to impart cushioning properties (elasticity) to the grass and protect the natural grass, it is preferable to use the grass in a manner that can achieve this purpose effectively.
In addition, the rubber chip is suitable as long as it has water permeability because it can provide a water supply effect to natural turf as well as a cushion effect.
The combined ratio of artificial turf and rubber chips is not particularly limited, but considering the growth situation of natural turf grown on this, the above-mentioned cushion effect, etc., artificial turf is usually about 70% (weight ratio). However, it is possible to reduce it to about half.

In the present invention, natural turf is grown on the artificial turf as described above.
Natural turf is broadly divided into Japanese turf and Western turf. Depending on the growth temperature, there are summer turf and winter turf. The summer turf has a high growth temperature of about 23 to 35 ° C. and can withstand summer in Japan. However, when the temperature falls below about 23 ° C., the growth stops and the leaves turn yellow. The winter turf has a suitable growth temperature of about 16 to 24 ° C. and can withstand a low temperature of about 1 to 7 ° C.

As summer-type turf, fertility is strong and recovery from damage such as stepping pressure and fraying is quick, so in soccer fields, sports stadiums, golf courses, etc., Korean turf (Japanese turf) and Tifton (Western) belonging to summer-type turf Turf) is used. Both Goryeo turf and Tifton embed a stalk called Stron in the nursery, roots grow from this stalk and extend horizontally with the ground, and stems and leaves grow into lawns.
In the case of a natural lawn, a construction method is generally employed in which the lawn surface is cut, expanded and transplanted with a width of 1 to 2 m, and then settled.

In the present invention, in order to use the artificial turf 3 described above as a nursery, turf soil 5 in which fertilizer is mixed with the nursery soil is laid on the artificial turf, and seeds of natural turf are planted on the turf mesh 5; Or embed Stron.
When embedding Stron, if the construction area is large, it takes time to embed, which is not practical. As long as seeds are germinated by seeding, it is only necessary to sow seeds on artificial grass 3 laid with turf-mesh 5, so it does not take time. For this reason, it is not Tifton (Western turf) that embeds Stron, it has the same fertility as these, and it is a variety that can recover quickly from damage such as trampling pressure and fraying and can germinate from seeds. Is desirable. In the present invention, the summer turf Sandyville II is selected as a variety that can meet these requirements. Sandyville II belongs to Bermuda grass and has excellent cold resistance among them, greening in early spring is extremely fast, leaf color is dark green, leaf width is narrow and long, and plant height is higher than general summer turf Low, short internodes and very dense turf.

  In addition, the summer turf that is healthy in the summer but withered in the winter is combined with two types of turf that die in the summer but is healthy in the winter. (Overseed method) may be employed. In the present invention, Sandyville II that is planted from seeds and grown is selected as summer-type turf, sowed in spring, and grown in summer. Then, after Sandyville II withers, winter-type turf that grows in winter, such as perennial or perennial ryegrass, is sowed on the withered Sandyville II, and sprouting from late autumn to early winter and grown in winter. These perennial ryegrass are also resistant to friction and recover quickly, so they are the best western turf for sports competitions, especially soccer.

  In the present invention, the artificial turf already laid can be applied as the artificial turf 3 described above. In this case, work on the lower surface side of the base fabric 3A (concrete, asphalt, gravel laying, etc.) becomes unnecessary.

[Example 1]
In April, sand, chemical fertilizer, and bark compost were mixed to make turf and then laid on artificial turf 3 laid in the configuration shown in FIG. 1 (see FIG. 2, 5 in FIG. 2 is turf). .
On the surface of the artificial turf 3, the seeds of Sandyville II were sowed uniformly so that there was no unevenness, and the same lawn soil as above was sowed until the seeds were hidden, and watered regularly.
After about 10 days, a germination mark was seen from the tip of the seed, and then it grew smoothly and became natural turf 6 as shown in FIG.

[Example 2]
In late autumn November, sand, chemical fertilizer, and bark compost were mixed to make turf-mesh 5 and laid on artificial turf 3 having the structure shown in FIG.
In November, seeded perennial ryegrass, sowed the same grass as above, until the seeds disappeared, and regularly sprayed water, sprouted in late autumn (or early winter), grown in winter, natural as shown in Figure 2 It became turf 6.
In spring, the perennial ryegrass had withered. In April, seeds of Sandyville II were planted from above, and the same lawn soil was planted and sprayed regularly until the seeds disappeared.
After about 10 days, germinate from the tip of the seed. In midsummer, the green 6 of Sandyville II as shown in FIG. 2 can be continued, and the natural turf 6 grows on the surface of the artificial turf 3 almost all year round. I was able to.

Example 3
In late autumn November, sand, chemical fertilizer, and bark compost are mixed to make turf-mesh 5 and laid on artificial turf 3 having the structure shown in FIG. Watered.
From Tiffton's stem, roots emerged along the surface of the artificial turf, and grew smoothly during the summer, as indicated by 6 in FIG.

[Reference example]
In any case of Examples 1 to 3, after natural turf 6 was sufficiently grown in the mode shown in FIG. 2 (specifically, in Examples 1 and 2, after about one and a half months after germination, In Example 3, about one and a half months after the roots emerged from the embedded stems), on the lawn, a car (with a displacement of 1500 cc), a motorcycle (with a displacement of 120 cc), a bicycle (with a wheel diameter of 26 inches). General ones) Serve with each one (at a low speed that does not cause an engine stop, and a part that could not be stepped on by a car is a motorcycle, and a part that could not be stepped on by either a car or motorcycle is a bicycle As a result of visual observation of the surface condition of the lawn after about 3 hours have passed since the running of all the vehicles, both the natural turf 6 and the artificial turf 3 were not crushed. , 3 is the vehicle running above It has been confirmed that keeping the same state as before.

DESCRIPTION OF SYMBOLS 1 Crushed stone layer 2 Water permeability improved asphalt layer 3 Artificial turf 3A Base cloth 3B Pile 4 Rubber chip 5 Turf soil 6 Natural grass

Claims (4)

  A method for constructing a lawn, characterized in that artificial turf is laid on at least one of concrete, asphalt, gravel, and soil, and natural turf is grown thereon.   2. The lawn construction method according to claim 1, wherein the artificial turf is a combination of artificial turf and rubber chips.   3. The lawn construction method according to claim 1, wherein the artificial turf is an already laid artificial lawn.   The lawn construction method according to any one of claims 1 to 3, wherein the natural turf is at least one of perennial, perennial ryegrass, Sandyville II, and Tifton.