JPH03262827A - Slope protection net and working method thereof - Google Patents

Abstract

PURPOSE:To produce such effects as tree-planting, prevention of disasters, or the like by fitting beltlike bodies in which one or more kinds out of fertilizer, soil improving materials, soil erosion preventive materials, or the like are held, on one side or on both sides of a protection net extended over a face of slope. CONSTITUTION:A protection net 1 is extended over a slope face 3, and on one side or on both sides thereof, beltlike bodies 2 in which one or more kinds selected out of fertilizer, soil improving materials, soil erosion preventive materials, or the like are held are fitted at appropriate intervals. And anchor pins 4, anchoring nails 5 are driven so as to penetrate through the beltlike bodies 2, so that a protection net 1 together with the beltlike bodies 2 is anchored on the slope face 3. As the materials for the beltlike bodes 2, any of the mats or the like consisting of woven fabric, nonwoven fabric, natural fibers or synthetic fibers may be used, and as the holding method of fertilizer or the like, any of impregnation, adhesion, sandwiching, covering, confinement in bag bodies, or the like may be used.

Description

Detailed Description of the Invention [Industrial Application Field] The present invention is directed to a protection system installed on a slope in order to prevent the seed spraying substrate sprayed onto the slope from flowing out and erosion of the slope. It concerns nets and their construction methods.

[Conventional technology] Seed spraying, which is a typical slope protection method using vegetation materials, is a construction method in which a seed spraying base material made of seeds, fertilizer, soil, wood fiber, erosion prevention material, etc. is sprayed onto the slope. , - On many slopes with slopes higher than windows, in order to prevent the seed spraying substrate from flowing out and slope erosion, first deploy a protective net on the slope and attach anchor pins or pegs to the slope. A tool is driven in to anchor the slope, and a seed spraying base material is sprayed onto the slope.

However, since this protective net is formed with a coarse mesh so as not to mask the slope too much, the connection between the protective net and the anchor stopper is poor, and the protective net may be torn at the anchor stop, or the anchor stopper may be torn. Sometimes it came off. Therefore, in order to deal with these problems, the following protection nets have been considered in the past.

(1) ``A net for preventing the collapse of slopes in which a horizontal striped pattern is formed by repeating the opening and closing of the net at appropriate intervals'' disclosed in Japanese Patent Application Laid-Open No. 59-88540 is An attempt was made to prevent the mesh from tearing and the anchor from coming off by driving the anchor into the critical area.

(2) ``A net for preventing landslides formed by weaving tape at appropriate intervals at least in the lateral direction of the net'' disclosed in Japanese Patent Application Laid-open No. 60-238526 is a method in which an anchor stopper is attached to the tape. The aim is to achieve the same effect by typing. The tape is made of a material such as polyethylene or polypropylene and has a width of 5 to 25 mm.

(3) As shown in Japanese Patent Application Laid-Open No. 60-242221, "After a net is spread out on a slope, band-shaped pressure bands are attached at appropriate intervals at least in the lateral direction of the net, and the pressure bands are The landslide prevention method, which is characterized by driving an anchoring device such as a peg through the rope and fixing it to the slope together with the rope, is aimed at a similar effect. ``Plate-shaped materials such as paper, cloth, plastic, and metal can be used, and the medium size is 5 to 50 m.
"Use a material with a diameter of about m.

[Problems to be Solved by the Invention] However, the dense portion of the net in the conventional example (1), the tape in the conventional example (2), and the pressure band in the conventional example (3) are all mainly made of a protective net. (It only prevents the mesh from breaking and the anchor anchor from coming off, and does not have any fertilizing effect, soil improvement effect, or erosion prevention effect on slopes. Because these materials were used to replace the slope surface for a long period of time after construction, seed establishment, germination, and growth were hindered in the areas where the slopes were constructed, resulting in horizontal stripes on the slope where no plants could grow. There was also the problem that the net structure of conventional example (1), in which the mesh was repeatedly made thinner and thinner, had a problem in that the manufacturing cost was quite high.

The purpose of the present invention is to solve the above-mentioned problems and prevent the tearing of the protective net and the detachment of the anchor anchor while suppressing cost increases, as well as to have a fertilizing effect on slopes, a soil improvement effect, and an erosion prevention effect. To provide a new slope protection net and its construction method that exhibits one or more of the following effects and does not leave any areas on the slope where plants cannot grow.

[Means for Solving the Problems] In order to achieve the above object, the following measures were taken in the present invention.

First, in the slope protection net according to claim 1, strips carrying one or more types selected from fertilizers, soil improvement materials, and erosion prevention materials are arranged in horizontal stripes at appropriate intervals on one or both sides of the protection net. It is configured so that it can be attached. Here, "carrying J" means impregnation, adhesion, clamping, hanging, sealing in a bag, etc. In addition, "striped material" includes woven fabric,
Examples include nonwoven fabrics (including felt), mats made of natural fibers such as coconut fibers loosened and hardened with a binder, and mats made of synthetic fibers similarly hardened with a binder (for example, oil-absorbing mats used at sea).

Furthermore, in the slope protection net according to claim 2, the band-shaped body is made of a perishable material or a water-soluble material. Here, examples of the "perishable material" include nonwoven or woven fabrics made of natural fibers or synthetic fibers that are decomposed by microorganisms in the soil, and mats made of the above-mentioned coconuts. Further, as the "water-soluble material", water-soluble paper can be exemplified.

Next, the method for constructing a slope protection net according to claim 3 is as follows:
A protective net consisting of strips carrying one or more types of fertilizers, soil improvement materials, or erosion prevention materials attached at appropriate intervals on one or both sides is spread out on the slope, and the strips are penetrated. A measure was taken to anchor the protective net together with the strip on the slope by driving an anchor stopper.

Further, the method for constructing a slope protection net according to claim 4 includes:
In addition to deploying a protective net on the slope, strips carrying one or more types selected from fertilizers, soil improvement materials, or erosion prevention materials are attached to one or both sides of the protective net at appropriate intervals, and the strips are A measure was taken to anchor the protective net together with the strip on the slope by driving an anchor stopper through it.

[Function] According to the slope protection net according to claim 1 or the construction method according to claim 3 or 4, even if a normal protective net having a substantially constant weave is used, the belt-shaped body that allows the anchor stopper to pass through can be obtained. The presence of the protective net can prevent the protective net from tearing and the anchor stopper from coming off. In addition, when a protective net is constructed on a slope and then a seed spraying base material is sprayed, the protective net and strip effectively prevent the sprayed seed spraying base material from flowing out and the slope from being eroded by rainwater, etc. To prevent. Furthermore, since one or more of the fertilizers, soil improvement materials, or erosion prevention materials supported on the strips gradually leaches out due to rainwater, etc., one or more of the fertilizers, soil improvement materials, or erosion prevention materials supported on the slope can be applied to the slope. Demonstrate.

Further, according to the slope protection net according to claim 2, in addition to the above-mentioned effect, the band-like body rots in a short period of time after construction, and dissolves in public water and disappears, so that the site where the band-like body was Plants will also grow.

[Examples] Examples embodying the present invention will be described below with reference to FIGS. 1 to 6.

The protective net 1 of this embodiment has a plurality of strips 2 attached to one side (or both sides as shown in FIG. 6) in a horizontal stripe pattern at predetermined intervals.

A coarse net is used for the protective net 1, but its material, weaving method, knotted or knotless mesh, etc. are not particularly limited. Knotted or knotless nets formed by knitting twisted yarns made of synthetic fibers such as nylon or polyethylene, or nets formed by welding linear bodies or thin tubes made of synthetic resins such as nylon or polyethylene in a lattice shape. For example, the protective net 1 of this embodiment is a knotless net made of polyethylene twisted yarn.

Further, the shape of the eyes of the protective net 1 is not particularly limited, and may be square or hexagonal, for example, but the size of the eyes is 10 to 5.
Preferably, it is 0 mm. If it is less than 10, the proportion that prevents the seed spraying base material from adhering to the slope will increase, and 5
This is because if the thickness exceeds 0 mm, the effect of preventing the outflow of the seed-sprayed substrate and erosion of the slope will be weakened. However, the size of the eyes may be approximately constant throughout the protective net 1, and the size of the eyes may be approximately constant throughout the protective net 1, and the size of the eyes may be approximately constant over the entire protective net 1.
Since there is no need to repeat the spacing and spacing as in 1), cost increases can be suppressed.

Next, for the band-shaped body 2, it is also possible to use a woven fabric or non-woven fabric made of general synthetic fibers that will last a long time after construction, but the perishable material that disappears in a short period of time or It is preferable to use a material made of a water-soluble material because it does not create any areas on the slope where plants cannot grow. Further, in terms of structure, it is preferable to use a material that can easily support fertilizers and the like, which will be described later, between the fibers, and for example, non-woven fabric, felt, etc. are most suitable. The band-like body 2 of this example was made of a nonwoven fabric or felt made of natural fibers such as cotton.

Moreover, the width of the strip 2 is preferably 20 to 50 mm.

If it is less than 20m, it will be difficult to penetrate the anchor stopper, and 50mm
This is because, if it exceeds this amount, the rate at which the seed-sprayed substrate is prevented from adhering to the slope increases. Although the thickness of the strip 2 is not particularly limited, it is generally 2 to 30 mm. The attachment interval of the strip 2 to the protective net 1 is 400 to 1000 mm.
is preferred. If it is less than 400 nm, the rate of interference with the adhesion of the seed spraying base material to the slope will increase, and if it exceeds 1000 nm, the distance between the anchoring devices will become too large, resulting in a decrease in anchoring performance, and the seed spraying by the strip 2 will be hindered. This is because the effect of preventing base material outflow and slope erosion will be weakened.

Examples of means for attaching the strip 2 to the protective net 1 include adhesive bonding, thermal welding, and fastening with strings, metal fittings, and the like.

The strip 2 of this example was adhered with an adhesive.

Next, one or more types selected from fertilizer, soil improvement material, and erosion prevention material are supported on the strip 2, and in this example, all three types are supported. Here, "support" has a broad meaning as described above, and for example, it can be impregnated with a liquid and dried, or supported by adhering or sandwiching a granular material.

The fertilizer can be appropriately selected from various known fertilizers depending on the type of seeds and the condition of the slope soil. It was impregnated and dried to support it.

The soil improving material can be appropriately selected from various known soil improving materials depending on the type of seeds, the condition of the slope soil, etc. In this example, a liquid pH adjusting material was used in the strip 2. It was impregnated and dried to support it.

The above-mentioned erosion prevention material can also be appropriately selected from various known erosion prevention materials depending on the condition of the slope soil, etc. In this example, the strip 2 is impregnated with a liquid water-soluble emulsion and dried. It was made to carry.

The protective net 1 configured as described above has a width of 50 to 30 mm.
It is in the form of a 0 cn band and is shipped wrapped in a roll for convenience during transportation.

To install this protective net 1 on a slope 3, as shown in Figs. An anchoring device such as an anchor pin 4 or a peg 5 may be driven through the protective net 1 along with the strip 2 to anchor it to the slope 3. As shown in FIG. 5, the protective net 1 may be spread out on the slope 3 with the strip 2 facing upward, and this may be easier to work with. Alternatively, as shown in FIG. 6, a protective net 1 having strips 2 attached to both sides may be developed.

The presence of the band-shaped body 2 can prevent the protective net 1 from tearing and the anchor pins 4 and the like from coming off. In this embodiment, a thick anchor pin 4 is driven through the strip 2 near the intersection of the protective net (2) (it does not matter if it is slightly shifted), and the protective net 1 is inserted in the area where the strip 2 is not present. A thin peg 5 is driven through the intersection of the eyes.

Subsequently, as shown in FIG. 3, a seed spraying base material 6 made of seeds, fertilizer, soil, wood fibers, erosion prevention material, etc. may be sprayed onto the slope 3. The protective net 1 and the band-shaped body 2 effectively prevent the sprayed seed spraying substrate 6 from flowing out and the slope surface 3 from being eroded by rainwater or the like.

In addition, after the above construction, as shown by the arrow in Fig. 3, the fertilizer, soil improvement material, or erosion prevention material supported on the strip 2 gradually leaches out due to rainwater, etc., and the fertilization effect on the slope 3. ,
Since the soil improvement effect or the erosion prevention effect is exhibited, the germination and growth of seeds are promoted, the plants 7 grow quickly as shown in FIG. 4, and the erosion of the slope 3 is more effectively prevented.

Furthermore, since the strip 2 of this embodiment uses a nonwoven fabric or felt made of natural fibers as a perishable material, the strip 2 will deteriorate as shown in FIG. 4 after 6 to 30 months have passed after construction. rot and disappear.

Therefore, the plants 7 will grow in the areas where the strips 2 were, so there will not be any areas on the slope 3 where the plants 7 will not grow as in the past.

In addition, as another method of constructing the protective net 1, it is also possible to transport the protective net 1 and the strip 2 separately to the construction site and connect them at the construction site. In other words, a protective net 1 is placed on the slope 3 at the construction site.
At the same time, strips 2 are attached to the protective net 2 at appropriate intervals, and anchor pins 4 and the like are driven through the strips 2. This construction method also provides the same effects as the construction method described above.

It should be noted that the present invention is not limited to the configuration of the above-mentioned embodiments, and can be modified and embodied as desired without departing from the spirit of the invention.

[Effects of the Invention] Since the present invention is configured as described above, it has the following excellent effects.

According to the slope protection net according to claim 1 or the construction method according to claim 3 or 4, it is possible not only to prevent the protection net from tearing and the anchor stopper from coming off, while suppressing cost increase, but also to prevent the protection net from tearing and the anchor stopper from coming off. It can exhibit one or more of the following effects: fertilization effect, soil improvement effect, or erosion prevention effect on the surface.

Further, according to the slope protection net according to claim 2, in addition to the above-mentioned effects, uniform greening and disaster prevention can be achieved without creating any areas without plants on the slope.

[Brief explanation of drawings]

Figure 1 is a perspective view showing an embodiment of a protective net embodying the present invention, Figure 2 is a front view of the same embodiment installed on a slope, Figure 3 is a sectional view immediately after construction, and Figure 4 is a cross-sectional view immediately after construction. The figure is a cross-sectional view when the strip disappears after construction, FIG. 5 is another cross-sectional view immediately after construction, and FIG. 6 is still another cross-sectional view immediately after construction. 1...Protection net 2...Strip body, 3...Slope surface,
4...Anchor pin, 5...Peg,
6... Seed spraying base material.

Claims (1)

[Scope of Claims] 1. A slope surface in which strips carrying one or more types selected from fertilizers, soil improvement materials, and erosion prevention materials are attached in horizontal stripes at appropriate intervals on one or both sides of a protective net. protection net. 2. The slope protection net according to claim 1, wherein the strip is made of a perishable material or a water-soluble material. 3. A protective net consisting of strips carrying one or more selected from fertilizers, soil improvement materials, or erosion prevention materials attached at appropriate intervals on one or both sides is spread out on the slope, and the strips are penetrated. A method for constructing a protective net for a slope, in which the protective net is anchored on the slope together with the belt-shaped body by driving in an anchoring tool. 4. Deploy a protective net on the slope, and attach strips carrying at least one type selected from fertilizer, soil improvement material, or erosion prevention material at appropriate intervals on one or both sides of the protective net. A method of constructing a protective net for a slope, in which the protective net is anchored on the slope together with the belt-shaped body by driving an anchoring tool through the body.