JPH07155051A - Base for planting lawn grass - Google Patents

Abstract

PURPOSE:To obtain a base for planting lawn grass useful for a golf course, etc., having improved load resistance, preventing occurrence of sinking hollow without damaging growth of lawn grass by forming a specific solid netlike material and a prescribed vegetation layer on a land grading base of draining structure. CONSTITUTION:A meshed solid netlike material 9 comprising a great number of continuous yarns of a thermoplastic synthetic polymer which have 0.1-1.5mm thickness, form irregular loops, are mutually crossed, mutually bonded at crossing points and contact points of a great number of the continuous yarns of the synthetic polymer and have 200-1,000g/m<2> weight, 5-50mm apparent thickness and 30-85% transmittance of parallel light rays in the thickness direction is laid on a base 4 for planting lawn grass of draining structure. A vegetation layer 12 having 7-10cm thickness composed of mixed soil of sand 10 and peat moss/perlite obtained by mixing the sand 10 with 3-6% peat moss/perlite 11 by weight is formed on the top of the solid netlike material 9 and lawn grass 14 is planted on the vegetation layer 12 to give the objective base for planting lawn grass.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a turf grass vegetation base reinforced, more specifically, a turf grass vegetation base reinforced on a base of a road surface portion such as an outdoor playground, a corfu ground, a racetrack or a racetrack vegetation. It is about.

In order to reinforce the base of the road surface portion where turfgrass is vegetated such as various plazas and runways described above, a flexible mesh element as disclosed in, for example, JP-A-59-130909 is used as sand. There are those mixed and used as a base, or those where, for example, mosslite made of cedar bark is mixed with sand and laid to reinforce the subbase, and turfgrass is planted on the surface to form a turfgrass ground. .

[0003]

[Patent Document 1] Japanese Unexamined Patent Application Publication No. Sho 5
A method for reinforcing a roadbed by mixing a flexible mesh element with sand such as Japanese Patent Laid-Open No. 9-130909 is a mixed soil in which the mesh elements are uniformly dispersed in the sand due to the difference in specific gravity between the sand and the mesh element. It is impossible to obtain uniform reinforcement of the base of the road surface part because a dense layer and a coarse layer of mesh element or sand are generated, and strong and weak parts of the road surface base strength occur. Even if turf grass is reinforced on the ground with the base of the road surface part reinforced and vegetation of turf grass is applied, if the wheel load of a heavy object such as a horse-runner is applied to the road surface, the ground support will be weak due to weak road support, The horseshoe sinks into the base layer, destroys a part of the base layer, and causes inconvenience such as turf grass peeling.

In addition, the vegetation layer in which mothrite made of cedar bark is mixed with sand absorbs excess water in the sand and retains the water, and when the water in the sand decreases, the water in the mothlite is removed. The moisture in the sand is dispersed to maintain the moisture in the sand, and the sliding of the sand grains is suppressed by the moistness due to the moisture and the friction resistance between the moslite and the sand grains. Even if turf and vegetation are vegetated, if wheel load of heavy load is applied to the road surface, inconveniences such as depression of the ground or peeling of grass may occur.

According to the present invention, the above-mentioned inconvenience is ameliorated by strengthening the retention of water in the vegetation layer and the supporting force against the vertical load on the vegetation layer. It is intended to provide a turfgrass vegetation base on which grass root cutting is unlikely to occur.

[0006]

SUMMARY OF THE INVENTION According to the present invention, a three-dimensional net body having a high porosity and having a high pressure resistance is laid on a ground leveling base constructed in a drainage structure, and a turf grass vegetation layer is formed thereon. The above-mentioned problem is solved by. That is, the turfgrass vegetation base of the present invention comprises a drainage-structured ground base, and a large number of continuous filaments of a thermoplastic synthetic polymer having a thickness of 0.1 to 1.5 mm, which form an irregular loop and are mutually connected. And a large number of synthetic polymer continuous filaments are adhered to each other at each intersection and contact point, and the basis weight is 200 to 1000 g.
/ M ² , an apparent thickness of 5 to 50 mm, and a matte three-dimensional net body having a parallel light transmittance of 30 to 85% in the thickness direction is laid, and a weight ratio of 3 to 3 is provided on the upper surface of the three-dimensional net body. ~ 6%
The characteristic feature is that a vegetation layer having a thickness of 7 to 10 cm is formed by a mixed soil of sand and moslite obtained by mixing mosslite of No. 1 with sand, and turfgrass is vegetated in this vegetation layer.

Examples of the synthetic polymer for forming the mat-like three-dimensional network include polyolefin-based polymers such as polyethylene and polypropylene, polyester-based polymers such as polyethylene terephthalate, polyamide-based polymers such as nylon 6, nylon 6, 6 and the like. Alternatively, a copolymer can be appropriately selected and used, but polypropylene is preferable from the viewpoint of manufacturing cost and pressure resistance.

If the thickness of the continuous filaments forming the three-dimensional net is 0.1 mm or less, the strength and rigidity in the vertical direction as a reinforcing material are insufficient, and if it is 1.5 mm or more, the rigidity is excessive and the long three-dimensional net is formed. It becomes difficult to wind the body into a roll.

Further, even if the basis weight of the three-dimensional net body forming the reinforcing material is less than 200 g / m ² , the strength and rigidity in the vertical direction as the reinforcing material are insufficient, and the basis weight is 1000 g / m ^2.
If it is more than m ² , the strength and rigidity in the vertical direction increase, but the porosity decreases and it becomes a solid base, which is not suitable for vegetation of turfgrass.

The thickness of the three-dimensional net body as a reinforcing material for the turfgrass base is 5 to 50 mm, and the transmittance of parallel light rays in the thickness direction is 30 to
About 85% is good. When the thickness is 5 mm or less, the entanglement between the mesh and the sand is small and the reinforcing effect against the external force in the horizontal direction or the vertical direction cannot be exerted, and when the thickness is 50 mm or more, the bulkiness becomes excessive and the long three-dimensional mesh is formed. It becomes difficult to wind up the roll. Also, the transmittance of parallel rays is 30
% Or less, the effect of suppressing the movement of sand entangled in the reticulate body and the effect of reinforcing the base become large, but the porosity is too small to prevent the grass roots from growing and developing as rhizomes, and the parallel light transmittance is 85%. When the above conditions are satisfied, the strength of the mesh body in the vertical and horizontal directions is reduced, and the base easily sinks due to the load.

The mat-like three-dimensional network body as described above can be obtained, for example, by the method described in Japanese Patent Publication No. 63-53332.

Moslite is made of bark of cedar, and Moslite L (manufactured by Takeda Horticultural Co., Ltd.) is effective. The vegetation layer, which consists of a mixture of muslite and 3-6% moslite in sand, absorbs excess moisture in the sand and retains it, and when the moisture in the sand decreases, the moisture in moslite is released. , Moisture due to moisture in sand and frictional resistance between moslite and sand grains suppress the sliding of sand grains, and provide moisture necessary for turfgrass growth. When the mixing ratio of moslite is 3% or less, the effect of retaining water in the sand is reduced and the sand is easily dried, and when 6% or more of moslite is mixed, it is uneconomical as compared with the effect caused thereby.

If the thickness of the vegetation layer for turfgrass is less than 7 cm, the road surface becomes a solid road surface with poor cushioning property, and if the vegetation layer for turfgrass is greater than 10 cm, the reinforcing effect of the three-dimensional reticulum is unlikely to spread, resulting in horse racing. The turfgrass reinforcement base layer sinks heavily when a wheel load of a machine-like weight is applied, and the upper layer cannot withstand shear stress, leaving the turfgrass reinforcement base layer in a recessed state. Invite.

[0014]

[Function] The mosslite of mosslite mixed soil in the vegetation layer for turfgrass absorbs excess moisture in the sand and retains it, and when the moisture in the sand decreases, it diffuses the moisture in the mullite The moisture of the sand is maintained, the sliding of the sand grains is suppressed by the moistness due to the moisture and the frictional resistance between the mosslite and the sand grains, the root cutting and rot of the turf grass are prevented, and the rhizome growth of the turf grass,
Promote growth.

A three-dimensional net having a parallel light transmittance of 30 to 85% and a thickness of 5 to 50 mm enhances the load bearing capacity of the vegetation layer in the vertical direction to secure the support of heavy objects, and has a high bulkiness and an appropriate amount. The voids facilitate the filling of sand and moslite, trap the filled sand, and prevent the sand and moslite from sliding in the vertical and horizontal directions to prevent movement of mixed soil in the vegetation layer. The voids promote the growth and development of the rhizome of the turfgrass, and the rhizome of the developed turfgrass is entangled with or allowed to pass through the reticulate body, grows into a strong grass root, and serves to reinforce the ground.

[0016] The lower ground leveling base improves drainage of the vegetation layer and prevents a large amount of water from staying in the vegetation layer to eliminate root rot of the grass.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a simplified sectional view illustrating a turf grass vegetation base of the present invention. As shown in the drawing, the turf grass vegetation base of the present invention is formed on a drainage-structured leveling base (4) comprising a base ground (1), a water-permeable sheet (2) and a sand layer (3).

The above-mentioned foundation ground formed below the ground
In this embodiment, (1) is a filter layer (7) in which a drainage drain (5) is buried and gravel or crushed stone (6) is placed around it.
To form a water-permeable layer (8) of crushed stone consisting of grained soil No. 6 over a thickness of about 20 cm, and on top of this water-permeable layer (8), polyester fiber (6D × 64 mm)
It is formed by laying a water-permeable sheet material (2) of a needle punching nonwoven fabric having a thickness of about 3 mm and a basis weight of about 350 g / m ² .

Then, on the water-permeable sheet-like material (2) of the above-mentioned foundation ground (1), Aminohama sand is spread and laid over a thickness of about 40 cm to form a sand layer (3), and then a compaction roller is used. It is pressed and compacted to form a drainage-structured ground leveling base (4).

According to the present invention, a large number of synthetic materials are used as a reinforcing material on a ground level foundation (4) having a drainage structure in which a sand layer (3) is formed on a foundation ground (1) constructed as described above. Laying a mat-shaped three-dimensional netting (9) consisting of polymer continuous filaments, laying a mixed soil of sand (10) and moslite (11) on it to lay a turfgrass vegetation layer (12), It is used as a turf grass vegetation base.

FIG. 2 is a mat-like three-dimensional net body of the above-mentioned reinforcing material.
It shows (9). This three-dimensional reticulate body in the example (9)
In the, a large number of continuous filaments (13) of a thermoplastic synthetic polymer with a thickness of 1.0 mm intersect each other in an irregular loop,
The large number of synthetic polymer continuous filaments (13) are adhered to each other at each intersection and contact point, and the basis weight is about 300.
g / m ² , apparent thickness 18 mm, porosity 98%,
A bulky mat-like structure having a parallel light transmittance of 67% in the thickness direction was used.

The turfgrass vegetation layer (12) is about 5 by weight.
% Of Moslite [Takeda Horticultural Co., Ltd. product] is mixed with sand [Aminohama sand], and mixed soil of sand (10) and Moslite (11) is used, and this mixed soil is placed on the three-dimensional net body (9). It is formed by spreading and laying it over a thickness of 8 cm and pressing and compacting it using a compaction roller.

The turfgrass (14) is vegetated on the turfgrass vegetation layer (12) reinforced by the turfgrass vegetation base of the present invention, and the turfgrass grows smoothly as a result of curing for 3 months. When the horse-riding machine was installed by induction, the subsidence of the road remained only a few cm, and the part under the wheel load that was being guided returned to its normal state when the wheel load was released.

On the other hand, for comparison, a three-dimensional reticulate body is formed in the turf grass vegetation layer.
The area where (9) was not laid was created, turfgrass was vegetated in the same manner as above, and after curing for 3 months, the turfgrass was growing smoothly. As a result of installing the horse-powered machine, the road surface sunk to less than 10 cm, and even after the wheel load was released from the wheel load, a clear dent mark due to the wheel load remained. It was

[0025]

As described above, the turf grass vegetation base of the present invention has a thickness of 0.1 to 1.5 on the ground level base (4) having a drainage structure.
mm of the thermoplastic synthetic polymer have a plurality of continuous filaments (13) intersecting each other in an irregular loop, and the plurality of synthetic polymer continuous filaments (13) are mutually connected at each intersection and contact point. Adhered and have a basis weight of 200 to 1000 g / m ² ,
A mat-like three-dimensional net body (9) having an apparent thickness of 5 to 50 mm and a transmittance of parallel rays in the thickness direction of 30 to 85% is laid, and the weight ratio is set on the upper surface of the three-dimensional net body (9). 3 to 6%
The vegetation layer (12) for turfgrass vegetation having a thickness of 7 to 10 cm is formed by the mixed soil of sand and moslite in which the moslite (11) is mixed with the sand (10). (1
When turfgrass (14) is vegetated in 2), even if a large amount of rain falls, it does not stay in the turfgrass vegetation layer (12) and is sequentially drained underground, so there is no root rot due to excessive water retention. The water supplied to the vegetation layer by rainfall and watering is sand (10) and mosslite (11).
The soil is appropriately maintained by the mixed soil with, and the water retention capacity of the mothlite (11) can always secure the water necessary for the growth of the turfgrass (14) without the vegetation layer (12) being excessively dried.

In addition, at the bottom of the vegetation layer (12), a three-dimensional net body is formed.
Since (9) is laid, lateral movement of the mixed soil of sand (10) and moslite (11) in the vegetation layer (12) is prevented, and the thickness of the vegetation layer (12) due to the flow of water due to rainfall. Can be prevented, the vertical load resistance can be further improved, the supporting force for heavy objects can be secured, and the vegetation layer (12) can be given load resistance and resilience after loading.

Furthermore, the bulkiness and appropriate voids of the three-dimensional net body (9) facilitate the filling of the sand (10) and the moslite (11) and bring about the trapping effect of the filled sand and the turfgrass (14). Turfgrass that has developed and promoted the growth and development of rhizomes (14)
Since the rhizomes of the plant are entangled with or pass through the three-dimensional reticulate body (9), they can grow into a strong grass root, and the vegetation layer (12) can be reinforced to form a turfgrass road surface having a large resistance to peeling by external force.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view showing an outline of the configuration of a turf grass vegetation base of the present invention.

FIG. 2 is a partial perspective view of a three-dimensional net body that reinforces a turf grass vegetation layer.

[Explanation of symbols]

1. Basic ground with drainage structure 2. Water-permeable sheet material 3. Sand layer 4. Leveling foundation 9. Three-dimensional net body 10. Sand 1
1. Moss Light 12. Turf grass vegetation layer 13 Continuous line 14. Turfgrass

Claims (1)

[Claims] 1. A large number of continuous filaments of a thermoplastic synthetic polymer having a thickness of 0.1 to 1.5 mm intersect with each other in an irregular loop on a grounded foundation having a drainage structure. The multiple synthetic polymer continuous filaments are adhered to each other at each intersection and contact point, and the basis weight is 200 to 1000 g /
m ² , an apparent thickness of 5 to 50 mm, and a mat-like three-dimensional net body having a parallel light transmittance of 30 to 85% in the thickness direction is laid, and a weight ratio of 3 to 3 is provided on the upper surface of the three-dimensional net body. A turfgrass vegetation base characterized in that a vegetation layer having a thickness of 7 to 10 cm is formed by a mixed soil of sand and moslite in which 6% of moslite is mixed with sand, and turfgrass is vegetated in this vegetation layer.