JPH0892962A - Net for sheathing and execution method thereof - Google Patents

Abstract

PURPOSE: To promote the fixation of turf and grass and to prevent the remaining of foreign matters by adding calcium carbonate to polyurethane as a main material, and by forming a net to hydrolyze the net for the stabilizing period of a top face. CONSTITUTION: A net 1 is formed of a material obtained by adding calcium carbonate or starch, etc., to polyurethane as a main material. Net stoppers 1a using polyurethane as a main material is formed. A plurality of the nets 1 are connected through the net stoppers 1a at the time of the execution of works to form a net for sheathing, and the net for sheathing is disposed on a soil surface such as the face of a slope in tension. Accordingly, turf and grass grow, the nets 1 are hydrolyzed, the fixation of turf, etc., is promoted and reinforced, and the face of the slope can be reinforced under a natural state.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an earth retaining net which is stretched on an embankment slope or a slope of a golf course or the like to prevent collapse and a construction method thereof.

[0002]

2. Description of the Related Art Conventionally, a porous rubber sheet or a porous plastic material connected in a block shape is stretched or covered on a slope or slope of an embankment and is fixed to each other or to the soil surface with a wire or a nail. . Above that, lawns and grass are planted on the soil surface to prevent the slope from collapsing.

However, rubber and plastic are difficult to corrode,
Has a semi-permanent life. Further, there is a problem that the above-mentioned rubber sheet and plastic material may interfere with the growth and breeding of lawns and grasses, or the construction of changing terrain.

Polyurethane has a property of being easily hydrolyzed originally, and therefore, an inhibitor is added to prevent it, but it is not used for soil protection.

[0005]

DISCLOSURE OF THE INVENTION The present invention covers the slopes and slopes of an embankment, and when a slope or slope is stable, a soil retaining net for planting lawns or grass on the soil surface decomposes and disappears, and The lawn and grass fertilizers are applied to the surface, and the life of the earth retaining net due to hydrolysis is terminated at various stable times of the soil surface, and the soil surface is prevented from collapsing without ending the life before stabilization. The purpose is to

[0006]

In order to achieve the above-mentioned object, the present invention is a net mainly composed of polyurethane, which is formed by adding calcium carbonate to accelerate hydrolysis of polyurethane. Soil protection net according to the above invention, which is equipped with a mesh stopper mainly made of polyurethane. Instead of the above calcium carbonate, starch, fertilizer, etc. are mixed together. The earth retaining net according to the above-mentioned first, second or third invention in which starch, fertilizer and the like are mixed. A net mainly made of polyurethane, in which the amount of calcium carbonate added to the polyurethane is adjusted to hydrolyze the polyurethane. It is constructed by the method of constructing earth retaining nets, which is characterized by controlling the life of the soil.

[0007]

In the present invention, lawn or grass is planted on the slope or slope of the embankment or cut-off surface, which is covered with a net, or after the net is stretched on the slope or slope, the lawn or grass is covered and planted. The mesh is connected to each other with a fastener, or the fastener is pierced on a slope or a slope to fix the mesh to the ground. In this way, the lawn or grass grows from the mesh, or the root enters the ground through the mesh and the net is covered with the lawn or grass.

Until the lawn or grass is fully alive and the soil surface is stable and the slope or slope is stable, the net and the stopper serve to prevent the slope and slope from collapsing. The fastener hydrolyzes and the fertilizer in the net promotes the growth of lawns and grass.

[0009]

EXAMPLE A rod-shaped plastic material 2 having an outer diameter of 8 to 10 mm,
2'is arranged in the weft and the intersections 2 "are welded to each other to form an integral mesh 1. The mesh 1'has a length of 15 to 20 mm.

The above-mentioned plastic materials 2 and 2'are mainly composed of polyurethane, and calcium carbonate, starch, fertilizer or the like is added to accelerate hydrolysis of polyurethane.
Further, calcium carbonate can be used together with starch, fertilizer and the like.

In order to connect the above nets 1, a plurality of nets 1 and 1 can be stretched over the soil surface 4 in a wide range by using the net stopper 1a shown in FIG.

Polyurethane alone disintegrates into pieces when heated and held at 200 ° C. for 4 hours, whereas
Approximately 3 hours with 10% by weight calcium carbonate,
If 20% is added, it disintegrates in about 2 hours and decomposes in soil to oxygen, hydrogen and nitrogen.

Comparing at room temperature, it is 4
It decomposes in 00 days, but when added 10% by weight, 300 days,
Decomposes in 200 days with the addition of 20% by weight.

When this is used for the earth retaining net 1, the life of the net 1 can be freely controlled by checking the rooting of the grass or the grass 5. When decomposed, it becomes a sponge and returns to the soil (Fig. 7).

The above decomposition can be promoted also by starch, synthetic fertilizers and the like, and it can be promoted by mixing and adding it with calcium carbonate. The amount thereof can be appropriately determined depending on the properties of the grass or grass 5, Acts as a fertilizer for grass or grass 5 during or after decomposition.

Of course, the mesh stopper 1a shown in FIG. 4 is not decomposed and remains in the same manner as described above. Incidentally, 2a is a sponge-like decomposed piece of the plastic material 1 or 1 '.

[0017]

EFFECTS OF THE INVENTION Since the present invention is constructed as described above, not only can the earth-stopping net and the net-stopping tool strengthen the slopes, slopes, etc. to provide earth-stopping, but also hydrolysis after turf or grass growth. However, it has the effect of promoting and strengthening the settlement of grass and grass on slopes and ridges, without the risk of leaving a hard net of foreign matter at the base of grass and grass and strengthening the golf course and other slopes or slopes to a natural state. is there.

[Brief description of drawings]

FIG. 1 is a side view of a slope or slope using the earth retaining net of the present invention.

FIG. 2 is a front view of FIG.

FIG. 3 is a plan view of FIG.

FIG. 4 is a front view of the mesh stopper.

FIG. 5 is a perspective view of a state of being spread on a slope.

FIG. 6 is a perspective view in a state of just before disassembly.

FIG. 7 is a view showing a sponge-like disassembled state.

[Explanation of symbols]

 1 mesh 1a mesh stopper

Claims (5)

[Claims] 1. An earth retaining net which is mainly made of polyurethane and which is formed by adding calcium carbonate to accelerate hydrolysis of polyurethane. 2. The earth retaining net according to claim 1, further comprising a mesh stopper mainly made of polyurethane. 3. The earth retaining net according to claim 1, wherein starch, fertilizer or the like is mixed in place of the calcium carbonate. 4. The earth retaining net according to claim 1, wherein starch, fertilizer and the like are mixed with the calcium carbonate. 5. A mesh mainly composed of polyurethane,
A method for constructing a soil stop net characterized by controlling the life of polyurethane by hydrolysis by adjusting the amount of calcium carbonate added to polyurethane.