JP2000170107A - Grass-preventing structural body - Google Patents

Abstract

PROBLEM TO BE SOLVED: To maintain good appearance and excellent durability by turning back an end portion of a grass-preventing sheet to be laid on the ground in a state of a tight contact with a concrete wall portion thereby prohibiting the growth of weeds between the wall portion and ground. SOLUTION: A glass-preventing sheet 1 is formed by unwoven fabrics, knitted goods and mesh-shaped goods consisting of synthetic fibers with a light-shielding rate of higher than 80% and a quantity of airflow of 10 to 50 cc/cm2. This grass-preventing sheet 1 is laid by embedding an end portion of the sheet 1 after excavating a boundary portion between ground 4 and a foundation structural body 2 made of concrete or asphalt, and turning back the sheet 1 in a state of tight contact with wall surface of the foundation structural body. Next, cobble (including small stone and gravel) or the like is laminated for fixation. In this case, the cobble may include a weed killer. Also, a water-permeable artificial lawn may be used for the grass removing sheet 1. And the growth of weeds from the boundary between concrete 2 and ground 4 is avoided. In this way, the grass-preventing structural body with excellent durability can be obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an excellent weed breeding inhibiting function and a durable weed control structure. More particularly, the present invention relates to a weed-proof structure comprising a foundation structure made of concrete or asphalt and a ground and a weed-proof sheet, and more particularly to a weed-proof structure having a perfect weed-proof function at its ends.

[0002]

2. Description of the Related Art Conventionally, a foundation structure made of concrete or asphalt and a grass-protection structure consisting of ground and a weed-proof sheet are placed on the edge of the foundation structure made of concrete or asphalt until the concrete. A grass sheet was laid, and the grass sheet was cut and fixed at the interface between the ground and concrete.

[0003] In such a weed-proofing structure, when a weed-proofing sheet is laid, for example, as a countermeasure against weeding in a vacant lot or the like, a weed species with strong roots emerges and propagates at the interface between the foundation structure and the ground. The fact is that the landscape is impaired.

[0004]

SUMMARY OF THE INVENTION The present invention relates to a conventional weed-proofing structure, in which weeding-out measures at the edge of a concrete or asphalt base structure are perfected.
An object of the present invention is to provide an excellent weed breeding inhibitory function and a durable weed control structure.

[0005]

Means for Solving the Problems The present invention adopts the following means in order to solve the above-mentioned problems. That is, the grass-proofing structure of the present invention has a basic structure made of concrete or asphalt. A weed prevention structure comprising a body, a ground, and a weed prevention sheet, wherein an end portion of the weed prevention sheet is folded and laid in a state of being in close contact with the concrete wall portion.

[0006]

DETAILED DESCRIPTION OF THE INVENTION The present invention addresses this problem, namely,
In the conventional weed control structure, perfect weed control on the wall (edge) of the foundation structure, and excellent weed growth inhibition function,
We study hard for the durable weedproof structure,
Surprisingly, when the weed control sheet was folded back in close contact with the wall of the foundation structure, it was found that such a problem could be solved all at once.

More specifically, the present invention specifically relates to a method for manufacturing a ground part at an interface between a wall surface of a foundation structure made of, for example, concrete or asphalt and the ground, to a depth of at least one.
After digging down about 0 cm, the end of the weed prevention sheet is brought into close contact with the concrete wall surface, and then the excavated earth and sand is buried back to provide a gap between the foundation structure wall part and the weed prevention sheet. That is, the grass sheet is folded on the ground surface and laid on the ground surface so as not to be in contact with the wall surface of the foundation structure. At this time, the grass sheet is
In the wall of the substructure, the shape is folded, and the shape in which the wall and the sheet surface are in close contact with each other is important. Further, it is preferable to effectively set the distance between the wall surface and the sheet surface of the weed prevention sheet, which is preferably at least 5 cm, more preferably 10 to 20 cm.

As the herbicidal sheet, a sheet having a penetration resistance of preferably 1 kg or more, more preferably 3 to 50 kg, particularly preferably 7 to 40 kg is used. A method for measuring such a penetration resistance will be described below.

First, a sample piece is placed on a washer having a through hole having a diameter of 7 mm, and the sample piece is pierced at a speed of 10 mm / min using a punching blade having a diameter of 6 mm opposed to the through hole. Read the resistance value. The shape of the punching blade is the same as that of the punch of the stationery, but the recess at the tip is 4.5 mm and the cutting edge angle is 4
Using five degrees, randomly measure 20 places and represent the average value.

As the weed prevention sheet of the present invention, at least one sheet selected from a nonwoven fabric, a woven or knitted fabric and a mesh, or a sheet composed of a combination thereof can be used. The term “woven or knitted fabric” as used herein mainly refers to a woven or knitted fabric, and a combination of the woven and knitted fabric, for example, an entangled weave or the like is preferably used. A combination structure with a nonwoven fabric is preferably used in view of the concealing rate and the light blocking rate. This point is the same for mesh-like objects (including net-like objects). The mesh-like material means any coarse sheet having a knotted tissue or a nodulated tissue. For example, a sheet-like material made of a woven or knitted fabric or a mesh-like material as a reinforcing material, which is composed of a nonwoven fabric, a combination of a woven fabric and a non-woven fabric, a combination of a non-woven fabric and a mesh-like material, or the like, is preferably used. As such a fiber cloth, a sheet composed of at least one selected from short fibers and long fibers made of synthetic fibers is preferably used in terms of strength.
From the viewpoint of the penetration resistance, a fabric composed of long fibers is preferably used, but a fabric composed of a nonwoven fabric is preferably used. The fineness is not particularly limited as long as it satisfies the above-described penetration resistance. However, it is preferable to use fibers having an average fineness of 1 denier or more, and more preferably an average fineness of about 1 to 15 denier. In this case, fibers obtained by mixing and using fibers of different fineness can be used in the present invention, and the above-mentioned average fineness includes such a case. It is also preferable to use fibers with a modified cross section in order to increase the light blocking ratio.

As such a weed prevention sheet, a sheet having a high light-shielding rate is preferable, and a sheet having a light-shielding rate of preferably 80% or more, more preferably 90% or more can effectively suppress the emergence of weeds. In order to maintain such a light-shielding rate, for example, when tufting, a hole is formed, so that it is necessary to close the hole with a backing agent. It is preferable to carry out the backing process with due consideration.
Therefore, as a backing agent, a dark or dark colorant, particularly a black colorant, is contained, and while maintaining the light blocking ratio, consideration is given to processing the backing partially, for example, only on the ridges of the tufting portion. Is preferred. When a high light-shielding rate is required for the herbicidal sheet itself, the sheet, in particular, the density of the fibers constituting the nonwoven fabric is preferably at least 0.3 g / cm ³ . In order to achieve such a fiber density, it is preferable to perform pressure bonding with a calender roll, and it is also possible to use an embossed roll using an emboss roll having a pressed area of 10 to 30%.

The light-shielding ratio is determined by placing a light-receiving portion on the bottom of a sealed test box having a hole having a diameter of 10 cm, and receiving light from a light source mounted directly above the sample by the light-receiving portion. The amount is measured with an illuminometer, and is calculated by the following equation using the ratio of the amount of received light before and after mounting the sample. The sample used for the test was 2
Use the one cut to the size of 0 cm x 20 cm.

Light shielding ratio (%) = (1−T ′ / T) × 100 where T: illuminance when the sample is not mounted (lux) T ′: illuminance when the sample is mounted (lux) The herbicidal sheet preferably has a water permeability of 1 × 10 ⁻³ cm / sec or more, more preferably 1 × 10 ⁻² cm / sec or more, measured according to JIS A-1218. More preferably, the air permeability measured by JIS L-1096 (Method A) is preferably 10 to 50 cc / cm ² / sec, more preferably 15 to 30 cc / cm ² / sec. As the grass sheet of the present invention, particularly preferably, 90
Those having a light-shielding rate of ９５95%, an air permeability of 15 to 25 cc / cm ² / sec, and a water permeability of 1 × 10 ^{−2 to} 5 × 10 ⁻² cm / sec are used.

[0014] The grass sheet preferably has a basis weight of 10
0-500 g / m ² , more preferably 150-300
A light sheet in the range of g / m ² but having an excellent weed control function is practical and preferable.

Further, in order to increase the light-shielding rate and further increase the herbicidal effect, the herbicidal sheet is formed of a dark-colored sheet, and the herbicidal sheet is provided with a herbicide and a fungicide. It is preferable to include at least one of insecticides and fragrances from the viewpoint of increasing the herbicidal effect. Such a herbicide can be contained as a fiber constituting a nonwoven fabric and a fiber structure by kneading, resin processing, or spraying a drug. For example, a fiber obtained by directly kneading a fiber-forming resin and using a spun fiber may be used, but a resin containing such an agent may be adhered to the fiber surface, or a non-woven fabric or a fiber structure surface may be adhered by resin processing. It may be made to be.

Further, as such a grass-proof sheet, a sheet having at least one kind of surface structure selected from a protrusion-like structure, a loop-like structure and a hair-like structure, preferably a sheet on which a pile for artificial turf is planted is used as a landscape. Used from above. Alternatively, a laminate of the bladder sheet and the artificial turf may be used. In this case, the artificial turf is preferably a water-permeable artificial turf.

To further explain these, as the above-mentioned protruding structure, for example, a structure obtained by subjecting at least the surface of the fibrous structure to embossing or wrinkling is used. Further, as the loop structure, for example, a loop pile (long fiber, short fiber) is randomly gathered, and a sheet-like material in which each loop is bonded is bonded to the nonwoven fabric, or such a loop aggregate is crimped. A sheet-like material bonded to the nonwoven fabric, a melt-extruded linear polymer deposited on the nonwoven fabric and fused,
It refers to one in which fibers are directly tufted to the nonwoven fabric to form a loop pile. Examples of the hairy structure include, for example, those obtained by raising the surface of the nonwoven fabric, those formed by tufting the cut nonwoven fabric and forming naps,
Flocked products obtained by flocking the nonwoven fabric to the nonwoven fabric, brushed or flocked products, nappied fabrics, especially carpets and artificial turf, and felts are laminated on the nonwoven fabric.

Among these surface structures, those having an artificial turf pile planted thereon and those having a laminated structure obtained by laminating an artificial turf on the fibrous structure are preferred. In the case of such a laminate, a water-permeable artificial turf is preferably used as the artificial turf in terms of air permeability and water permeability. For each of these sheets, a dark colored material is preferably used.

Further, in order to fix the grass sheet on the ground surface, a particle size of 5 to 5 is laid on the laid grass sheet.
It is preferable to stack 100 mm of gravel (including pebbles and gravel) to a thickness of 5 to 10 cm.

As the grass sheet of the present invention, a sheet having water permeability and capable of returning rainwater to the ground is used.
Normally, a grass sheet laid on a flat ground is used bare and exposed, so that the grass sheet is deteriorated in weather resistance due to ultraviolet rays, and has a life span of only about two years. Was. However, by laying the gravel on the sheet, the life of the sheet can be extended.

When the gravel is filled on the surface of the herbicidal sheet, the gravel preferably contains a herbicide. When such herbicides are contained in gravel (including pebbles and gravel), those containing herbicides mixed directly with gravel, those containing herbicides adsorbed on activated carbon or porous resin particles, Can be used in which a herbicide is mixed with a resin, and a fine powder obtained by mixing the mixture with a pebble is used. As such herbicides, those generally used and commercially available can be used.

In the present invention, a water-repellent granular material can be used instead of or together with such gravel. It is preferable to lay and laminate such a water-repellent granular material on the weed-proof sheet because the herbicidal effect can be further improved. The water-repellent granular material is constituted by coating or spraying at least one selected from a fluorine compound and a silicon compound onto a mineral particle such as at least one selected from gravel and sand. Among them, the one made of the latter silicone compound is preferably used from the viewpoint of durability.

Examples of the fluorine-based compound include polytetrafluoroethylene-based compounds and poly (meth) acrylate-based polymer compounds having a fluorocarbon group such as perfluoroalkyl or perfluoroalkenyl allyl ether in the side chain. A fluorinated polymer or copolymer having a chain can be used.

Examples of the silicon-based compound include polyalkylsiloxanes having a silanol group at the end, polymethylphenylsiloxane, polymethylvinylsiloxane, and other polyalkyl, polyalkenyl, polyarylsiloxane, methylhydrogenpolysiloxane, and copolymers thereof. Coalescence and the like can be used.

The fluorine compound and the silicon compound may be cured by further blending a curing agent or a crosslinking agent. Durability can be further improved by such curing. As such a curing agent and a crosslinking agent, for example, a silicone resin curing agent, a silane coupling agent, various metal alcoholates, various metal chelate compounds,
Isocyanate compounds, melamine resins, polyfunctional acrylic resins, urea resins and the like can be used. Of course, a polyfunctional silicon compound or a polyfunctional fluorine compound can be used in combination.

The weed control structure of the present invention will be further described with reference to the drawings. FIG. 1 is a schematic diagram showing an example of the concrete wall part weed prevention structure of the present invention.

Reference numeral 1 denotes a weed control sheet. Such a weed prevention sheet 1 is a roll-shaped winding having a width of 2 to 4 m and a length of 100 m, and a winding diameter of about 30 cm is used. This is spread on a plane. At this time, if there is a joint in the stretched sheet, it is preferable to overlap with a size of 15 cm or more. Reference numeral 2 denotes a concrete wall surface. Reference numeral 3 denotes a gutter dug down at the interface between the concrete wall surface and the ground.

Reference numeral 4 in FIG. 2 shows the earth and sand backfilled with the grass sheet bonded to the concrete wall surface in the side groove.
Reference numeral 5 denotes gravel and water-repellent particulates laminated on the grass sheet.
The role of the gravels and the water-repellent particles is used for the purpose of preventing UV-deterioration of the herbicidal sheet made of synthetic fiber and preventing germination by airborne weed seeds.

The weed control structure of the present invention is constituted by forming the surface of a structure such as a ground, a golf course, a park, a sidewalk, a sidewalk, a median strip, a parking lot, under the floor, a lake shore and a river shore. And the effect can be suitably exhibited. Here, the surface means a surface portion, and need not be the outermost surface.

[0030]

The present invention will be described in more detail with reference to the following examples.

Example 1 Polyethylene terephthalate containing 0.4% of carbon black was melt-spun at 290 ° C. on a wire mesh net conveyor to collect a black nonwoven long-fiber nonwoven web. Is mixed with a low-melting fiber of about 30 ° C. lower and press-bonded with an embossing roll at 230 ° C. at a linear pressure of 20 kg / cm to obtain a black long-fiber nonwoven sheet having a basis weight of 200 g / m ² and a thickness of 0.5 mm. Base cloth was obtained.

The grass sheet thus obtained is laid in advance in a gutter dug at the interface between the concrete wall surface and the ground in a state of being joined to the concrete wall portion downward, and then the gap in the gutter is backfilled with soil. The grass sheet is folded back and laid on flat ground.

Table 1 shows the weed emergence and propagation after 2 years per 10 m of the concrete wall surface having a weed-proof structure formed by laminating gravel thereon.

Comparative Example 1 As a conventional weeder, Table 1 shows the results of the weed emergence and propagation after two years per 10 m of the concrete wall surface when the grass sheet is laid against the concrete wall. .

[0035]

[Table 1] As is clear from Table 1, the wall length of the concrete wall 1
Two years after the grass sheet constructed per 0 m has passed, the grass sheet is laid down in advance in a gutter dug at the interface between the concrete wall surface and the ground in a state of being joined to the concrete wall downward, and then the gap between the gutters When weeds are laid back on soil and then laid on a flat ground with no weeds, no emergence of weeds is confirmed.On the other hand, when weeds are laid on the concrete wall only. Is
It was confirmed that various kinds of weeds sprout from the interface with the concrete and partially propagated, and a difference was observed in the weed control effect with the present patent method.

Example 2 Masa soil was sieved to a particle size of about 5 mm.
It is dried at 80 ° C. to give a dry soil with a water content reduced to 4% by weight. Next, 3% by weight of dimethylpolysiloxane was added to water.
The mixed liquid thus mixed is stirred with a mixer to form a micro dispersion. After the above-mentioned dry soil is immersed in this dispersion, the temperature is raised and dried. Finally, the temperature is raised to the condition of baking at 250 ° C., baking at 250 ° C. for 5 minutes, taken out, and repelled. Aqueous granules were obtained. The water-repellent granules are relatively large sand having a particle size of 1.5 to 3 mm.
It had a water permeability of 5 × 10 ^-2 cm / sec.

Next, a polyethylene terephthalate containing 0.4% of carbon black is melt-spun at 290 ° C. onto a net conveyor of a wire mesh to collect a black nonwoven web of nonwoven fabric, and the melting point of the nonwoven fabric web constituting the web is reduced. About 30 ° C
A low-melting fiber was mixed and pressed and bonded with an embossing roll at 230 ° C. at a linear pressure of 20 kg / cm.
A weedproof sheet made of a black long-fiber nonwoven fabric sheet having an m ² and a thickness of 0.5 mm was obtained.

Next, three monofilaments having a flat cross section of 600 denier of the original polypropylene containing a green pigment are aligned and twisted at a rate of 100 turns / m.
To set pile yarn.

The pile yarn was tufted on the above-mentioned grass-proof sheet under a rougher condition than a usual method, and cut into piles to prepare artificial grass. The tufting conditions at this time were a pile gauge (planting interval) of 5/8 inch, a stitch (number of pieces to be planted) 4 / inch, and a pile length after flocking of 25 mm. Next, back stitching was performed on only the stitch streaks on the back surface with a rotary screen so as to have an adhesion amount of 1200 g / m ² with SBR latex, followed by drying in a heating furnace at 130 ° C. to produce a water-permeable artificial lawn. The grass sheet of this artificial lawn strip has a penetration resistance of 1
3 kg, 100% light-shielding ratio, and 2 × 10 ^-2 cm / sec water permeability.

Next, a 2.5 m × 2.5 m sheet obtained by cutting a pile existing in a width of 5 cm around the artificial turf is removed from a concrete block by weeding in advance and leveling the ground. Embedding a 2m x 2m enclosure
The inner periphery of the enclosure was dug down 10 cm, and the grass sheet was brought into close contact with the concrete wall 5 cm below the ground surface, and the excavated earth and sand was backfilled. After this operation was performed on each of the four sides, the water-repellent granules were sprayed on the grass-proofing material at about 30 kg / m ² , and the leaves were filled so that the leaves of the artificial turf remained 2 mm.

The obtained grass-proofing structure has a surface layer composed of green leaves and water-permeable and water-repellent granules.
Upon observation, no weeds were present, and no weeds were observed near the walls of the concrete blocks. When the strength of the herbicidal sheet of the structure was measured, almost no decrease in strength was observed.

[0042]

According to the present invention, it is possible to easily provide a weed-proofing structure having a perfect weed-proofing function at the edge of a foundation structure made of concrete or the like, an excellent weed-growth inhibiting function, and an excellent durability. Can be provided.

[Brief description of the drawings]

FIG. 1 is a schematic view showing an example of a weed control structure of the present invention.

FIG. 2 is a schematic view showing an example of a weed-proof structure of the present invention, in which gravel and water-repellent granules are laminated on a weed-proof sheet.

[Explanation of symbols]

 1: Weed prevention sheet 2: Concrete 3: Gutter 4: Ground 5: Gravel or water-repellent granular material

Claims (20)

[Claims] 1. A weed control structure comprising a foundation structure made of concrete or asphalt, a ground and a weed prevention sheet, and the edge of the weed prevention sheet is folded and laid in a state of being closely contacted with the concrete wall part. A weed-proofing structure characterized by the following. 2. The weed-proofing structure according to claim 1, wherein said weed-proof sheet is folded in a state where said concrete wall surface and said sheet surface are in close contact with each other. 3. The weed control structure according to claim 1, wherein the distance between the concrete wall surface and the sheet surface is at least 5 cm. 4. The grass sheet has a penetration resistance of 1 kg or more, a light blocking ratio of 80% or more, and a water permeability of 1 × 10 ⁻³ / sec or more measured according to JIS A-1218. The weed prevention structure according to any one of claims 1 to 3. 5. The anti-weed sheet according to claim 1, wherein said weed control sheet is composed of synthetic fibers and is at least one selected from long-fiber non-woven fabric, short-fiber non-woven fabric and woven fabric. Grass structure. 6. The herbicidal structure according to claim 1, wherein the weed-proof sheet has a ventilation rate of 10 to 50 cc / cm ² / sec as measured by JIS L-1096 (Method A). body. 7. The weed control structure according to claim 1, wherein said weed control sheet is made of fibers having an average fineness of 1 denier or more. 8. The herbicidal structure according to claim 1, wherein the herbicidal sheet is a nonwoven fabric and has a basis weight of 100 to 500 g / m ² . 9. The herbicidal soil structure according to claim 1, wherein the herbicidal sheet has a penetration resistance of at least 1 kg. 10. The weed-proofing structure according to claim 1, wherein said weed-proofing sheet is a dark-colored sheet. 11. The herbicidal structure according to claim 1, wherein said herbicidal sheet contains at least one of a herbicide, a fungicide, an insect repellent, and an aromatic. 12. The weed control sheet according to claim 1, wherein said weed control sheet has at least one kind of surface structure selected from a projection structure, a loop structure and a hair structure. Structure. 13. The weed control structure according to claim 12, wherein said surface structure is obtained by planting a pile for artificial turf. 14. The weed control structure according to claim 1, wherein said weed control sheet is a laminate with artificial turf. 15. The grass-proofing structure according to claim 14, wherein the artificial turf is a water-permeable artificial turf. 16. The herbicidal structure according to any one of claims 1 to 15, wherein the herbicidal structure has a surface structure on which at least one of gravel and water-repellent particulates is laid. 17. The herbicidal structure according to claim 16, wherein the water-repellent granular material is at least one selected from a fluorine compound and a silicon compound. 18. The herbicidal soil structure according to claim 16, wherein the water-repellent granules are crosslinked or hardened. 19. The herbicidal structure according to claim 16, wherein said water-repellent granules are laminated to a thickness of at least 5 cm. 20. The weed control structure according to claim 20, wherein
20. The weedproofing structure according to any one of claims 1 to 19, comprising a surface of a structure selected from a park, a sidewalk, a sidewalk, a median strip, a parking lot, a floor below, a lake shore, and a river shore. .