JPH0460604B2 - - Google Patents

Description

Detailed Description of the Invention (Field of Industrial Application) The present invention protects Japanese turf grass at golf courses and other various stadiums, parks, etc. from being trampled, and also prevents clogging of the turf itself. , relates to a method of planting Japanese grass to maintain the beauty of the lawn over a long period of time.

(Prior art) Background of the invention Japanese grass is a creeping plant that belongs to the genus Zoysia in the Poaceae family. It is durable, resistant to dryness, does not require much care, and has a beautiful appearance, so it has been used since the Nara period. It has been planted in gardens since then. In recent years, with the promotion of golf and other various competitions and sports, the expansion of park facilities, and the development of aviation, the demand for lawns has been increasing, and the demand for lawns has expanded, resulting in increased demand for lawns, golf courses and other athletic facilities, parks, private gardens, airports, etc. It is extremely widely used for everything from plazas in front of stations to erosion control works.

As mentioned above, grass is a relatively hardy plant, but its disadvantage is that it is easily trampled, and it is used on golf course teeing grounds, cart roads, greens; fields such as baseball fields, and lawn tennis courts. In areas that are repeatedly stepped on by many people, it is difficult to avoid the leaves and stems above the ground becoming frayed, and the ground gradually becoming hardened, resulting in clogging. In particular, inhibition of root respiration caused by clogging due to treading pressure not only increases the plant's respiration quotient and blocks the Krebs cycle of hydrous carbon, which is the main energy source for plants, but also causes root respiration due to poor drainage. This leads to a decrease in microbial resistance and, in turn, to the development of root rot.
Once this condition occurs, the plants naturally lose their vitality, and eventually the ground becomes exposed and loses its life as a lawn.

Traditionally, the method of planting Japanese grass has been to thoroughly plow the ground in the area where the planting is planned, then lay out the shikishi lawn that has been cut into sheets, fix it to the ground with bamboo skewers, and finally top it up. The method used is to spread dry soil (sand) and apply light pressure.
It takes a considerable amount of time for the bamboo skewers to become completely established, and since the bamboo skewers rot immediately, they are not resistant to pressure from people, vehicles, etc.

In view of the above-mentioned problems in lawn management, there has recently been a movement to replace natural grass with artificial grass in some sports facilities such as baseball stadiums. However, artificial grass is still a substitute, and it cannot match the texture and feel of natural grass. Not only that, but it is also expensive, and the construction itself, such as wastewater treatment, requires a large amount of money.

Problems with the Prior Art Therefore, in order to somewhat improve the damage and clogging of the lawn caused by treading pressure, etc., a large number of annular bodies r, r... as shown in Fig. 6 are connected to vertical and horizontal joints j, j...
Protective Matsutto M, which is integrated with
Attempts have been made to lay this on lawn surfaces. However, in this known pine, the runners extending from inside the annular body r are prevented from freely migrating, so the momentum of the runners cannot extend upward or laterally beyond the wall of the annular body. Unavoidably, when this happens, the running stems that extend upwards create unpleasant undulations on the flat lawn surface, while the running stems that extend into the soil spread over the soil and hinder air circulation. and impede root respiration. In addition, many of the running stems that have managed to extend horizontally are often cut or seriously damaged by being caught between the upper surface of the annular body r and the sole of the shoe.

Another proposal is to use a perforated corrugated plate structure made of a synthetic resin perforated corrugated plate fixed to a porous base material as described in Utility Model Application Publication No. 53-107543 as an underlay material for lawn fabric. However, even if this improves the ventilation to the roots of the grass, it does not improve the compaction of the roots, and it does not protect the leaves and stems of the grass, so there is a risk of friction between running and the club head. It also does not help to reduce damage to Shiba due to etc. Moreover, the greatest difficulty is that secondary processing is required for assembly.

Due to the above-mentioned circumstances, there has been no satisfactory means for protecting lawns from trampling.

(Problems to be Solved by the Invention) In view of the above circumstances, the present invention aims to protect Japanese turf grass at golf courses and other various stadiums, parks, etc. from being trampled, and at the same time, prevent clogging of the turf itself. To provide a new method for planting grass that can prevent the problem and maintain the beauty of the lawn for a long period of time.

(Means for Solving the Problems) In order to achieve the above object, the method of planting Japanese grass according to the present invention involves digging down the ground of the planned grass planting area, and placing the top and bottom portions in the excavated area. After laying a water-permeable structure made of a corrosion-resistant material having a hole or a space in between and having mechanical strength at least enough to withstand treading pressure, the top of the structure is lower than the opening surface of the excavation part. The structure is characterized by placing a lawn on top of the structure and applying top soil if necessary. Hereinafter, various matters related to the structure of the invention will be explained in terms of sections.

A: [Water-permeable structure] Here, "a water-permeable structure made of a corrosion-resistant material and having discontinuous convex portions that have at least enough mechanical strength to withstand tread pressure" means, for example, plastics, ceramics, or stainless steel. Steel: refers to a water-permeable structure with substantially discontinuous projections made of a corrosion-resistant rigid material such as aluminum, copper, zinc, or their alloys, and if it satisfies this condition, a specific It doesn't matter what the structure is. For example, as an appropriate specific structure, as shown in Fig. 1, the water-permeable structure has a shape in which zigzag plate-like units are assembled in a lattice shape, and the hypotenuses of the units allow the passage of running stems. A structure in which a hole is bored and its modification; A structure in which the water-permeable structure is composed of a forward and reverse combination of unit truncated cones with holes in the top and sides, as shown in FIG. 2; and a modification thereof; 3rd As shown in the figure, there is a structure in which a large number of hollow or solid pile-shaped protrusions are made to stand upright from the surface of a substrate with holes, and variations thereof. Supplementary explanations are given below.

The lattice-like structure 1 _A is constructed by combining unit plates 2 in a zigzag shape at equal pitches in a lattice shape, and each plate has a plurality of through holes 3, 3...
...is worn. This structure has sufficient space 4 (including holes 3) in the vertical and horizontal directions, and has sufficient mechanical strength, so it supports the growth of roots and running stems in the lawn placed on top. In addition to not hindering
Effectively prevents soil compaction due to trampling pressure. However, in terms of implementation, it is difficult to use injection molding, which is important as an industrial production means, and it is difficult to assemble unit pieces. In addition, throughout the following examples, the height of the structure is 2.
It is suitable to select from a range of about 5 cm.

The frusto-conical structure _1B has a structure in which each lattice of the lattice-like structure described above is substantially surrounded by a wall 5, and a through hole 6 is added to this wall, and geometrically, , is defined as a conjugate of regular and inverted truncated cones (truncated cones) lacking top and bottom surfaces. The through hole 7 in the top surface of each truncated cone, the through hole 6 in the wall surface of each cone, and the gap (space) 4 between each truncated cone are sufficient for the growth of grass roots and stems. give. Moreover, unlike the former, (a) it is possible to apply injection molding means, (b) it is possible to stack up to the required height, and (c) it is easy to connect each unit structure (Fig. Protrusions 8, 8... provided on each of the two adjacent sides
. . . and 9, 9 . . . are connecting members, which can be connected to the rings and protrusions of adjacent units, respectively. )
Due to the following characteristics, it is considered to be optimal at present.

The pile-like structure 1 _C has a large number of through holes 11, 11
A large number of pile-shaped protrusions 12, 12, . The protrusion 12 may be hollow. This product can also be molded in one piece by injection molding, and allows for the growth and development of roots and stems.
It has ample space for expansion. In addition,
It is also easy to add a connecting means like the above.

B: [Installation and Planting] Figure 7 shows the procedure for planting a lawn using the above structure.

First, after thoroughly tilling the soil E at the planned planting site, the soil is dug down to a depth of A+B (where A is the height of the structure; B is the thickness of the lawn L). Of course, when spreading sand, potting soil, compost, bulk, oil cake, or other filling layer for the purpose of soil improvement, dig as deep as the thickness of the layer (I in this figure).

Next, structure 1 (in the figure, structure 1
_B ) and cover it with lightly burned field soil S (Figure B).

After that, the lawn L is laid down at appropriate intervals, and top sand S' is spread on top of it to compact it, and then water is sprinkled to finish the construction (Fig. C).

In addition, if necessary, a double structure may be used in which the structure 1 is further placed on the lawn L and top dressing is spread from above. This method is time-consuming, but
The anti-tread pressure protection effect for grown grass is perfect.

(Operation) According to the method of the invention described above, since the water-permeable structure has discontinuous convex portions, a large space is formed between the lawn placed on top and the ground, which allows the roots of the Japanese grass to Since sufficient air is supplied to
Grass grows actively and quickly forms a lawn. The established grass grows by freely extending its stems and roots through the spaces and through holes inside the structure, and eventually becomes integrated with the structure. Even when vertical loads are applied by legs or wheels, the convex parts of the structure support the loads and prevent pressure from being applied to the roots and running stems, which prevents consolidation of the roots, which are the lifeblood of grass. Prevented. For this reason, even if the lawn is trampled by many people, it is less susceptible to trampling and remains active for a long time. Furthermore, since compaction is unlikely to occur, spiking work can be omitted or simplified, which is an advantage that cannot be overlooked in terms of management.

(Effects of the Invention) As explained above, the present invention protects Japanese grass lawns such as Japanese grass grasses such as Japanese grass grasses, Japanese grass grasses, and Japanese grass grasses in golf courses and other various stadiums, parks, etc. from trampling damage, and also protects the grasses themselves from being trampled. By being able to provide a new method of planting grass that can prevent clogging and maintain the beauty of the lawn for a long period of time, it can contribute to the public life and related industries.

[Brief explanation of the drawing]

FIGS. 1 to 3 are plan views A and sectional views B showing different forms of water-permeable structures that can be used in carrying out the present invention, and FIG. 4 is an explanation illustrating the implementation steps of the inventive method. FIG. 5 is a cross-sectional view illustrating the state of growth of grass after implementing the method of the invention, and FIG. 6 is a perspective view illustrating a known trample prevention device for lawns. The meanings of the symbols in the diagram are as follows: 1 _A ~ 1 _C
...Water permeable structure: 2...1 _A unit plate; 3...
1 Through hole in _A ; 5...1 Wall of unit truncated cone in _B ;
6...Through hole in 5, 7...1 Through hole in the top surface of _B ; 8 and 9...1 Connection protrusion and ring in _B ; 10...
_1C substrate; 11... _1C through hole, 12... _1C pile-like projection; 4... _1A to _1C space. M...Known protected pine; r...M's ring-shaped part, j...joint between r; E...soil, L...lawn, S...field soil, S'...top sand.

Claims (1)

[Scope of Claims] 1. A water-permeable structure made of a corrosion-resistant material, which is formed by digging into the ground of the area where Japanese grass is to be planted, and having discontinuous convex portions in the dug-out portion that have a mechanical strength that is at least strong enough to withstand tread pressure. After the structure is laid so that the top of its convex part is lower than the opening surface of the digging part, a lawn is placed on top of the structure, and if necessary, top soil is further applied. How to plant Japanese grass. 2. Claim 1, wherein the water-permeable structure has a shape in which zigzag plate-like units are assembled in a lattice shape, and holes are bored in the oblique sides of the units to allow the passage of running stems. Or the method described in paragraph 2. 3. The method according to claim 1 or 2, wherein the water-permeable structure is composed of a forward and reverse combination of unit truncated cones having holes at the top and sides. 4. The method according to claim 1, wherein the corrosion-resistant material is plastic.