JP2003082668A - Vegetation and greening method for slope face - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a greening method offering sufficient weather resistance, easy handing during storage, carrying and work execution permitting material laying on a slope face in a stable state and widened choices for vegetation base materials. SOLUTION: An earth retaining sheet 1 having an adequate width is folded and overlapped at predetermined intervals, its root portion is sewed, flat portions 11 with predetermined length 11 and folded portions 12 are formed alternately, an insulation sheet 5 is inserted to the inner surface of the folded portion 12, the folded portion 12 is laid with a horizontal rod member 2 inserted to the inner side of the folded portion 12, or the horizontal rod member 2 inserted after laying, next the folded portion 12 is moved upward and fixed to the head portion of an anchor 6 where the horizontal rod member 2 is protruded to the face of slope 3, a pocket 13 is formed with the folded portion 12 and a flat portion 11 facing to the folded portion 12, and plants 8 are grown by filling the vegetation base material 7 in the pocket 13.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for greening a slope, particularly a slope that is relatively steep and difficult to green as it is.

[0002]

2. Description of the Related Art Conventionally, as one of greening methods for a steep slope, a method of filling a vegetation base material into a pocket formed by using a soil retaining sheet or a wire mesh on the slope is disclosed in, for example, No. 71533, JP-A-7-3799,
It is presented in Japanese Patent Laid-Open No. 9-78588.

As disclosed in Japanese Utility Model Laid-Open No. 6-71533, as shown in FIG. 8, a pocket is formed on the back side of a wire net with a retaining sheet or a fishing net, and the pocket is laid on the slope. The above-mentioned pockets are filled with a vegetation base material, and the one disclosed in Japanese Patent Application Laid-Open No. 7-3799 discloses a method in which rods are provided at predetermined intervals on a line suspended from the shoulder as shown in FIG. The method of attaching a soil retaining sheet to a pocket, fixing it by hanging it in a pocket, and filling the pocket with a vegetation base material, and the method disclosed in Japanese Patent Application Laid-Open No. 9-78588 are as shown in FIG. The ropes are sequentially attached to the tops of anchors etc. driven into the surface and extended laterally while floating from the slope, forming a pocket between the upper rope and the lower rope. Stretch a net and fill the pockets with vegetation base material. It is intended to.

[0004]

However, according to the conventional greening method of forming pockets on the slope, the soil retaining sheet forming the pockets is a single layer, so that when the strength is not sufficient, the vegetation filled inside is filled. It tears due to the weight of the base material,
There was a problem of cutting. This is because, in particular, the soil retaining sheet itself must be made of a material and a structure through which the roots of the plant can penetrate, and further, it will be deteriorated with time due to the ultraviolet rays of the irradiated sunlight.
It is also possible to cover the surface of the soil retaining sheet with a heat insulating material for the purpose of protecting the vegetation base material in the pocket from freezing and thawing to improve weatherability, but the heat insulating material is generally a thin polyethylene sheet. Since it is formed of a sheet made of a material that is weak against ultraviolet rays, there is a problem that the deterioration is rapid and the heat insulating effect is lost promptly.

Further, since the anchor is first installed on the slope and then the soil retaining sheet is laid, the anchor portion of the laid soil retaining sheet is in a protruding state, which is poorly fitted and the opening of the pocket portion becomes narrow. There is a drawback that.

Further, as disclosed in Japanese Utility Model Laid-Open No. 6-71533, when a pocket is formed on the back surface of a wire net, it is difficult to handle because it is bulky as a whole when it is stored and transported as a roll. Since the grain size of the vegetation base material depends on the mesh, it is necessary to prepare a grain size that can pass through beforehand, and it is not possible to use coarse grain such as soil generated at the site, and workability is reduced. It is both bad and economically disadvantageous.

Furthermore, as disclosed in Japanese Unexamined Patent Publication No. 7-3799, in the case where bar members are attached at predetermined intervals to the rope suspended from the shoulder and the earth retaining sheet is suspended and fixed in a pocket shape. Has a problem that the load is concentrated on the anchor installed on the shoulder, and in particular, Japanese Patent Laid-Open No. 7-3
In the case of construction on site with a steep slope, such as those presented in Japanese Patent Publication No. 799 and Japanese Patent Laid-Open No. 9-78588, not only is installation difficult, but a stop that stops vertical and horizontal members. There was also a problem that many special tools such as metal fittings had to be used.

The present invention is intended to improve the method for greening the slope using the conventional pockets, which has sufficient weather resistance and is easy to handle during storage and transportation, and further during construction. It is intended to provide a method for planting a slope surface, which has many advantages such as being able to be laid on the slope surface in a stable state and having a wide selection of vegetation base materials.

[0009]

In order to solve the above-mentioned problems, the present invention is to fold and sew a soil retaining sheet having an appropriate width at predetermined intervals and sew it, thereby forming a flat portion and a bent portion of a predetermined length. And is alternately formed and is laid on the slope with the horizontal bar inserted inside the bent part, or the horizontal bar is inserted after laying, and then the bent part is moved upward. The horizontal bar member is moved and fixed by the head of an anchor projecting from the slope, and a pocket is formed by the bent portion and the flat portion facing the bent portion, and the vegetation base material is filled in the pocket. It is characterized by growing a plant by doing.

By using the bent portion of the soil retaining sheet in the front portion of the pocket formed of the soil retaining sheet, the front portion of the pocket is folded back to form a double structure, thereby improving durability and weather resistance. . Also, because it is done by fixing the horizontal bar inserted inside the bent part at the top of the anchor installed on the slope, not only special tools such as fasteners are not required, but also the laying work is easy. In addition, since the opening of the pocket is wide open, it is not necessary to use a vegetation base material having a predetermined particle size.

Further, in the present invention, when the heat insulating sheet is inserted on the inner surface of the bent portion of the soil retaining sheet, the heat insulating sheet can be attached by a simple operation.
Since the attached heat insulating sheet is shielded by the bent portion of the soil retaining sheet and is not directly irradiated with sunlight, it is possible to effectively prevent the sun rays from being deteriorated by ultraviolet rays.

Further, when the folded portion of the soil retaining sheet is folded a plurality of times, when the surface of the folded portion of the soil retaining sheet forming the pocket is covered with the reinforcing sheet, the soil retaining sheet forming the pocket is formed. When the surface of the bent portion of the sheet is covered with the reinforcing agent, the durability and weather resistance of the pocket can be further improved.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, embodiments of the present invention will be described in detail with reference to the drawings.

1 to 3 show a preferred example of a preferred embodiment of the present invention. As shown in FIG. 1, for example, hemp or polyester fiber having an appropriate thickness is used as a material and is formed by a Russell weave. A soil retaining sheet 1 having a suitable width and length, which is made of a sheet material through which a root of a plant can penetrate, is folded and folded at predetermined intervals and the root portion is sewn, and a flat portion 11 having a predetermined length is bent. The parts 12 are formed alternately and the horizontal bar 2 is inserted in the inner top of the bent part. The horizontal bar 2 may be inserted at the time of construction, and in this case, it is convenient for storage in a warehouse or transportation to the site.

When constructing the slope 3, the soil retaining sheet 1 is first laid on the slope 3 from the shoulder 31 to the slope 32 as shown in FIG. 2 (B). At this time, a heat insulating sheet made of, for example, a polyethylene sheet is stored in the folded portion 12 of the soil retaining sheet 1, and FIG.
As shown in (A), a wire mesh 4 having an appropriate mesh is pre-tensioned on the surface of the slope 3, so that the soil retaining sheet 1 can be obtained.
Can be prevented from sliding down. In addition, wire mesh 4
Has a role to reinforce the slope, but is not always necessary depending on, for example, the slope angle of the slope and the stability of the soil.

Next, as shown in FIGS. 2 (C) and 3, each bent portion 12 is moved upward to penetrate the flat bar 11 at a predetermined distance from the portion of the horizontal bar 2. The head of the anchor 6 protruding from the slope 3 is fixed to each other by sewing or tightening with a string or the like to form the pocket 13 with the bent portion 12 and the flat portion 11 facing the bent portion 12. Therefore, there is no need for a special stopper or the like for fixing the soil retaining sheet to a wire net or a cord like the conventional one.

In this embodiment, since the anchor 6 penetrates the soil retaining sheet 1 and is projected on the slope 3, the anchor portion of the soil retaining sheet laid on the slope 3 is in a protruding state and the fit is poor. There is no need to worry about narrowing the opening of the pocket.

Further, the soil retaining sheet 1 is supported on the slope 3 by a large number of anchors 6 protruding on the slope 3 at appropriate intervals in the vertical and horizontal directions, so that the load is not concentrated on a part thereof. , It is laid on the slope 3 in an extremely stable state.
In addition, the number of anchors 6 and the installation location can be appropriately selected according to the situation of the ground, which is economical in terms of labor and tools.

Then, as shown in FIG. 2 (D), each pocket 13 is filled with a vegetation base material 7 and various mixed seeds are sown in the vegetation base material 7, or the vegetation base material 7 is sown. The seeds 8 are mixed in advance to grow the plants 8 as shown in FIG. 2 (E) for greening.

The present embodiment constructed as described above is
By forming the bent portion 12 that forms the front surface of the pocket 13, that is, by folding it back into a double structure, it is possible to improve the durability against earth pressure, weight, etc. and the weather resistance due to ultraviolet rays from sunlight. Moreover, since the heat insulating sheet 5 is inserted into the inner surface of the bent portion 12 of the soil retaining sheet 1, the heat insulating sheet 5 can be attached by a simple operation, and the attached heat insulating sheet 5 can be bent from the soil retaining sheet 1. Since the light is not shielded by the portion 12 and the sunlight is not directly irradiated, it is possible to effectively prevent the deterioration of the sun rays due to the ultraviolet rays.

FIG. 4 shows a different embodiment of the soil retaining seal 1 of the present invention, which is different in that the bent portion 12 is bent a plurality of times. Furthermore,
In the present embodiment, the front side is formed longer when laid on the slope, and when installed as shown in FIG. 5, the long portion 14 is wound inside and sewn, and the top portion susceptible to ultraviolet rays is tripled. It is covered and protected.

6 and 7 show a further different embodiment of the present invention. The one shown in FIG.
For example, a case where a reinforcing sheet 9 made of a highly durable sheet such as a tent is covered on the surface of the bent portion 12 of the soil retaining sheet 1 having the pockets 13 is shown. The bent portion 12 of the sheet 1 can be protected for a long period of time. In particular, when a material having poor water permeability such as a tent is used, the pocket 1 may be formed due to freezing and melting of the vegetation base material filled inside the bent portion 12.
It is also possible to omit the heat insulating sheet 5 (see FIG. 3) installed for the purpose of protecting the vegetation base material 7 in 3 and improving weatherability.

In addition, as shown in FIG. 7, the soil retaining sheet 1 laid on the slope 3 is covered with a reinforcing agent 10 such as cement milk containing an adhesive made of resin or emulsion to cover the surface of the folded portion 12 with the soil retaining sheet 1. This is to protect the bent portion 12 of the sheet 1 for a long period of time, and the soil retention sheet 1 constructed as shown in the figure may be sprayed with a reinforcing agent to solidify it. You may keep it.

[0024]

As described above, the present invention not only excels in durability and weather resistance by folding back the front part of the pocket, but also requires a special tool such as a stopper. Without doing so, the laying work is easy, and since the opening of the pocket is wide open, it is not necessary to use a vegetation base material with a predetermined grain size whose grain size is adjusted.

Further, the heat insulating sheet can be attached by a simple work of inserting it, and the attached heat insulating sheet is shielded from light by the bent portion of the soil retaining sheet and is not directly irradiated with sunlight. It is possible to effectively prevent deterioration of light rays due to ultraviolet rays.

Further, the bent portion of the soil retaining sheet is folded many times, the reinforcing sheet is covered on the surface of the folded portion of the soil retaining sheet forming the pocket, and the folding of the soil retaining sheet forming the pocket is folded. By covering the surface of the curved portion with a reinforcing agent, it is possible to further improve durability and weather resistance.

[Brief description of drawings]

FIG. 1 is a side end view of a soil retaining sheet used in an embodiment of the present invention.

FIG. 2 is an explanatory diagram showing a construction order in the embodiment of the present invention using the soil retaining sheet shown in FIG.

FIG. 3 is an explanatory perspective view of a slope formed by the construction order shown in FIG.

FIG. 4 is a side end view showing a different embodiment of the soil retaining sheet of the present invention.

FIG. 5 is an explanatory diagram showing a construction example using the soil retaining sheet shown in FIG.

FIG. 6 is an explanatory diagram showing another embodiment of the present invention.

FIG. 7 is an explanatory diagram showing still another embodiment of the present invention.

FIG. 8 is an explanatory diagram showing a conventional example.

FIG. 9 is an explanatory diagram showing another conventional example.

FIG. 10 is an explanatory diagram showing still another conventional example.

[Explanation of symbols]

1 soil retaining sheet, 2 horizontal bar material, 3 slopes, 5 heat insulation sheet, 6 anchor, 7 vegetation base material, 9 reinforcement sheet, 1
0 reinforcing agent, 11 flat part, 12 bent part, 13 pocket

Claims (4)

[Claims] 1. A soil retaining sheet having an appropriate width is fold-folded at predetermined intervals and a root portion thereof is sewn to alternately form flat parts and bent parts of a predetermined length, and the bent parts. Insert the heat insulating sheet on the inner surface and lay it with the horizontal bar inserted inside the bent part, or insert the horizontal bar after laying, then move the bent part upward. Then, the horizontal bar portion is fixed by the head of an anchor protruding on the slope, a pocket is formed by the bent portion and the flat portion facing, and the pocket is filled with a vegetation base material. A method for planting slopes, which is characterized by growing plants. 2. The method for greening a slope surface according to claim 1, wherein the bent portion of the soil retaining sheet is bent a plurality of times. 3. The method for greening a slope according to claim 1, wherein the surface of the bent portion of the soil retaining sheet forming the pocket is covered with a reinforcing sheet. 4. The method for greening a slope according to claim 1, wherein the surface of the bent portion of the soil retaining sheet forming the pocket is covered with a reinforcing agent.