JP3260650B2 - Waterproof vegetation base material - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water-impervious vegetation base material which is a water-impervious material on slopes, slopes and seawalls, and at the same time serves as a vegetation base for plants.

[0002]

2. Description of the Related Art Water-impervious sheets on slopes, shoulders and seawalls, or at the bottom of waste disposal sites,
For example, there is a rubber sheet or a sheet made of polyolefin or vinyl chloride, reinforced with a reinforcing material, laid on the entire surface and shielded.

For example, as described in Japanese Utility Model Application Laid-Open No. 60-14136, a vegetation net formed by tangling a wire net and a continuous filament of a thermoplastic synthetic polymer, or Japanese Unexamined Patent Publication No. Hei.
As described in -118196, a water-permeable sheet is attached to both surfaces of a water-impervious sheet, and a net is joined to one of the water-permeable sheet surfaces, and the water-permeable sheet and the net are connected to each other. There is proposed a drainage material for tunnel-covered water conveyance in which a drainage layer is formed.

[0004]

However, the vegetation mesh described in Japanese Utility Model Application Laid-Open No. 60-14136 uses a rough wire mesh having a turtle shell shape, so that the waterproof sheet is damaged, rusted or corroded. Occurs. Also, Japanese Patent Application Laid-Open No.
The drainage material for tunnel-covered water guide described in Japanese Patent No. 8196 is obtained by laminating a nonwoven fabric to a net-like body, and has no strength enough to shield sharp waste.

[0005]

According to the present invention, a large number of continuous thermoplastic synthetic polymer filaments having a diameter of 0.1 to 2.0 mm form an irregular loop on one surface of a water-impermeable sheet. A bulky three-dimensional net having a predetermined thickness, continuous in the length direction, having a parallel light transmittance of 50 to 90% and a large porosity, and joining the three-dimensional net with vegetation soil. These problems have been solved by filling.

That is, according to the present invention, on one surface of a water-impermeable sheet, a large number of continuous thermoplastic synthetic polymer filaments having a diameter of 0.1 to 2.0 mm form an irregular loop and have a predetermined thickness. While bending irregularly to form peaks and valleys,
Structure that extends from one to the other and is glued together at each intersection
And continuous in the length direction and the parallel light transmittance is 50
It is a water-shielding vegetation base material characterized by being joined with a bulky three-dimensional net having a porosity of 70 to 99% and a porosity of 70 to 99% . The three-dimensional net is filled with soil and, if necessary, fertilizer, grass and tree seeds, and a soil material mixed with a water retention material. It is constructed to maintain water-blocking and prevent vegetation greening, so that erosion such as flowing out of the soil does not occur.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION The water-impermeable sheet forming the water-impervious vegetation base of the present invention is designed to prevent rainwater from penetrating into the slopes and shoulders, and to prevent the liquid portion of the waste from penetrating into the ground and causing odor. Is a water-impermeable rubber, polyethylene, polypropylene, ethylene vinyl acetate, or other film-like sheet material having a thickness of 0.4 to 3.0 mm.
Can be used.

[0008] When the thickness is less than 0.4 mm, the impact strength is insufficient, and there is a risk of inconvenience such as tearing when the three-dimensional net is combined and integrated. When the thickness exceeds 3.0 mm, the impact strength is improved but the cost is high. Become. Preferred thickness is 1.0 to
2.0 mm.

Further, when two sheets of the above-mentioned film-like sheets are stacked, the water-shielding effect can be maintained even if one of them is damaged.

The three-dimensional network bonded to one surface of the water-impermeable sheet is a bulky three-dimensional network having a large porosity and formed by a large number of continuous synthetic polymer filaments having a diameter of 0.1 to 2.0 mm. A single melt or a composite melt of two or more thermoplastic synthetic polymers such as polyethylene, polypropylene, polyamide, and polyester can be used. However, in view of production costs, polypropylene and polyethylene having a relatively low melting point. Is convenient. Such a three-dimensional network can be produced by a known method, for example, the method described in JP-B-63-53332.

[0011] More specifically, the three-dimensional network has a predetermined thickness in the horizontal and thickness directions while many continuous filaments of the synthetic polymer having a diameter of 0.1 to 2.0 mm cross each other. Has a structure that extends from one side to the other while being irregularly bent to form a peak and a valley, and is adhered to each other at each intersection, and has an apparent thickness of 15 to 100 mm, preferably 20 to 70 mm, and a porosity. Is about 70 to 99%, preferably about 80 to 90%, and it is desirable to have a compressive strength to withstand the earth pressure while having a parallel light transmittance of 50 to 90%.

The porosity is less than 70% , the parallel light transmittance is 5
If it is less than 0%, the entangling of the continuous filaments is too good and the filling by spraying the soil for vegetation greening becomes insufficient, and there is a possibility that a cavity is formed in the reticulated body to inhibit the growth of the plant.

[0013] When the porosity is 99% ultra Etaira line light transmittance greater than 90%, vegetation elicit erosion immediately blown soil dressing insufficient strength to hold the soil dressing for vegetation greening mottled Inconveniences such as becoming

As a method for deploying and laying the water-impervious vegetation base material of the present invention, in waterproofing on a slope, a shoulder, and a seawall, the water-impervious vegetation base material is deployed with the three-dimensional net-like body surface facing upward, and the adjacent impervious material is impermeable. End faces of the conductive sheet
Alternatively, they can be superposed and fused by hot air and deployed and laid.

Further, the water-impermeable sheet and the water-impermeable sheet surface of the water-impermeable vegetation base material are spread on the upper surface of the existing water-impermeable sheet material with the three-dimensional net-like body surface of the water-impermeable vegetation base material of the present invention facing upward. It can be deployed and laid by fusing with hot air.

As a method for filling the soil into the three-dimensional net-like body, a hydroseeder method, a soil seeder method, and other commonly used methods for spraying the soil can be applied.

Further, a polymer absorber is added to the soil for vegetation greening,
It is also possible to lay by mixing a water retention material such as zeolite. In addition, watering equipment or the like can be filled on the top surface of the vegetation greening soil.

[0018]

According to the present invention, since the three-dimensional net-like body surface is arranged on the upper surface and deployed and laid, and the voids of the three-dimensional net-like body are filled with soil for soil, fertilizer, grass and tree seeds, the water is impervious. Because the water-impermeable sheet that forms the vegetation base material can maintain the water-shielding property, the soil is blown into the voids formed by the continuous filaments of the three-dimensional net-like body, and the soil is held by the continuous filaments. Erosion, such as the flow of guest soil, does not occur even on steep slopes.

Therefore, when the seeds for vegetation revegetation germinate and the vegetation prospers, the impermeable sheet is shielded from ultraviolet rays, so that deterioration can be suppressed.

In addition, if flowers are spread and laid in the vegetation, the seasonal flowers can be enjoyed and the scenery can be protected.

FIG. 1 is a partially cutaway perspective view showing a part of a water-impermeable vegetation base material (1) of the present invention, and FIG. FIG. 2 is a cross-sectional view of the water-shielding vegetation base material (1) taken along the line AA in the thickness direction.

[0022]

EXAMPLE A three-dimensional network (2) was prepared by a known method (Japanese Patent Publication No. Sho 63
A method comprising a large number of continuous filaments (4) having a diameter of about 1.1 mm and having a porosity of 98%, a parallel light transmittance of 65%, and an apparent thickness of 29 mm produced by the method described in US Pat. used. One side of the three-dimensional net (2) has a thickness of 1.5 m of ethylene / propylene vulcanized rubber.
m, basis weight 1550 g / m ² , tensile strength 250 kg / cm
^2. An impermeable sheet (3) having an elongation of 650% was bonded to form a water-impervious vegetation base material (1).

The above porosity is defined as ｛(V1−V2), where V1 (cm ³ ) is the apparent volume of the three-dimensional network, and V2 (cm ³ ) is the volume occupied by the synthetic polymer continuous filaments.
/ V1｝ × 100. V2 is T = πr ² L, where T (g) is the weight of the three-dimensional net having a predetermined area, h is the specific gravity of the synthetic polymer, 2 r (cm) is the diameter of the continuous filament, and Lcm is the total length of the filament. If L is obtained from the relationship of / h, then V2 =
πr ² L.

Example 1 The above-mentioned water-impermeable vegetation base material (1) having a width of 2 m and a length of 3 m was used as shown in FIG.
The three-dimensional net-like body (2) is deployed and laid on the inclined surface of 5% with the anchoring pile (1) around the impermeable vegetation base material (1).
At 0), it was fixed to the ground (11).

Next, the following items were prepared as guest soil. Greening base material GS Soil No. 11 (manufactured by Aiki Shoko Co., Ltd.) 156 liter china clay minosoil 120 kg caustic fertilizer 3 kg fast-acting fertilizer HYCON 700 1.6 kg Stabilizer Drobond 1 kg Water retention material Sodium polyacrylate 1 kg Seed Kentucky Falcon 150 g CRF Pen loan 150g 〃 White clover 20g

The above-mentioned soil is sufficiently stirred with a stirrer, and the thickness of the soil from the top of the three-dimensional net (2) is reduced to 5 by a soil blown seeder.
It was sprayed until it reached about cm. The soil (12) was filled into the voids of the three-dimensional net-like body, and was secured in a continuous line, and was stable on the slope (13) and the shoulder (14). Further, 600 liters of water were sprayed immediately after spraying the soil. The white clover began to germinate in about one week, and thereafter, Kentucky Falcon, CRF pen lawn, etc. germinated and grew from between the grass roots of the white clover.

[Brief description of the drawings]

FIG. 1 is a schematic perspective view of a water-impermeable vegetation base material of the present invention.

FIG. 2 is a sectional view of the water-impermeable vegetation base material of the present invention, taken along the line AA in FIG. 1;

FIG. 3 is a schematic cross-sectional view showing an example in which the water-impermeable vegetation base material of the present invention is laid on the ground.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Water-impervious vegetation base material 2 Three-dimensional net 3 Water-impermeable sheet 4 Continuous filament 5 Mountain part 6 Valley part 10 Anchor pile 11 Ground mountain 12 Guest soil 13 Slope 14 Slope

Continuing from the front page Examiner Takayoshi Fukada (56) References JP-A-5-118196 (JP, A) JP-A-51-119108 (JP, A) Japanese Utility Model Showa 57-22535 (JP, U) Japanese Utility Model Showa 60 -14136 (JP, U) JP-A-3-36029 (JP, U) JP-A-2-134828 (JP, U) JP-B 63-53332 (JP, B2) (58) Field surveyed (Int.Cl) . ^7, DB name) E02D 17/20 102 E02D 17/20 103 E02B 3/12

Claims (1)

(57) [Claims] 1. On one surface of a water-impermeable sheet, a large number of thermoplastic synthetic polymer continuous filaments having a diameter of 0.1 to 2.0 mm form an irregular loop and have a predetermined thickness. Irregular
Bends from one side to the other while forming peaks and valleys.
And a bulky three-dimensional net having a parallel light transmittance of 50-90% and a porosity of 70-99%, which is continuous in the length direction and is bonded to each other at each intersection. A water-impervious vegetation base material characterized by: